Merge remote-tracking branch 'upstream/dev' into wiki

220 files changed, 8245 insertions, 7196 deletions

diff --git a/vendor/sabre/dav/.travis.yml b/vendor/sabre/dav/.travis.yml
index 48c88b169..a9189c981 100644
--- a/vendor/sabre/dav/.travis.yml
+++ b/vendor/sabre/dav/.travis.yml
@@ -3,12 +3,6 @@ php:
   - 5.5
   - 5.6
   - 7
-  - hhvm
-
-matrix:
-  fast_finish: true
-  allow_failures:
-      - php: hhvm
 
 env:
   matrix:
@@ -17,17 +11,25 @@ env:
 
 services:
   - mysql
+  - postgresql
 
 sudo: false
 
-cache: vendor
-
 before_script:
-  - mysql -e 'create database sabredav'
+  - mysql -e 'create database sabredav_test'
+  - psql -c "create database sabredav_test" -U postgres
+  - psql -c "create user sabredav with PASSWORD 'sabredav';GRANT ALL PRIVILEGES ON DATABASE sabredav_test TO sabredav" -U postgres
+  - phpenv config-rm xdebug.ini; true
   #  - composer self-update
-  - composer update --prefer-source $LOWEST_DEPS
+  - composer update --prefer-dist $LOWEST_DEPS
+
+# addons:
+#    postgresql: "9.5"
 
 script:
-  - ./bin/phpunit --configuration tests/phpunit.xml $TEST_DEPS
+  - ./bin/phpunit --configuration tests/phpunit.xml.dist $TEST_DEPS
   - ./bin/sabre-cs-fixer fix lib/ --dry-run --diff
 
+cache:
+  directories:
+    - $HOME/.composer/cache
diff --git a/vendor/sabre/dav/CHANGELOG.md b/vendor/sabre/dav/CHANGELOG.md
index f719c8e1a..d8a3898c3 100644
--- a/vendor/sabre/dav/CHANGELOG.md
+++ b/vendor/sabre/dav/CHANGELOG.md
@@ -1,6 +1,106 @@
 ChangeLog
 =========
 
+3.2.0 (2016-06-27)
+------------------
+
+* The default ACL rules allow an unauthenticated user to read information
+  about nodes that don't have their own ACL defined. This was a security
+  problem.
+* The zip release ships with [sabre/vobject 4.1.0][vobj],
+  [sabre/http 4.2.1][http], [sabre/event 3.0.0][evnt],
+  [sabre/uri 1.1.0][uri] and [sabre/xml 1.4.2][xml].
+
+
+3.2.0-beta1 (2016-05-20)
+------------------------
+
+* #833: Calendars throw exceptions when the sharing plugin is not enabled.
+* #834: Return vCards exactly as they were stored if we don't need to convert
+  in between versions.
+* The zip release ships with [sabre/vobject 4.1.0][vobj],
+  [sabre/http 4.2.1][http], [sabre/event 3.0.0][evnt],
+  [sabre/uri 1.1.0][uri] and [sabre/xml 1.4.1][xml].
+
+
+3.2.0-alpha1 (2016-05-09)
+-------------------------
+
+* Database changes for CalDAV. If you are using the CalDAV PDO backends, you
+  must migrate. Run `./bin/migrateto32.php` for more info.
+* Support for WebDAV Resource Sharing, an upcoming standard.
+* Added support for sharing in the CalDAV PDO backend! Users can now invite
+  others to their calendar and give them read/read-write access!
+* #397: Support for PSR-3. You can now log exceptions with your favourite
+  psr3-compatible logging tool.
+* #825: Actual proper, tested support for PostgreSQL. We require version 9.5.
+* Removed database migration script for sabre/dav 1.7. To update from that
+  version you now first need to update to sabre/dav 3.1.
+* Removed deprecated function: `Sabre\DAV\Auth\Plugin::getCurrentUser()`.
+* #774: Fixes for getting free disk space on Windows.
+* #803: Major changes in the sharing API. If you were using an old sabre/dav
+  sharing api, head to the website for more detailed migration notes.
+* #657: Support for optional auth using `{DAV:}unauthorized` and `{DAV:}all`
+  privileges. This allows you to assign a privilege to a resource, allowing
+  non-authenticated users to access it. For instance, this could allow you
+  to create a public read-only collection.
+* #812 #814: ICS/VCF exporter now includes a more useful filename in its
+  `Content-Disposition` header. (@Xenopathic).
+* #801: BC break: If you were using the `Href` object before, it's behavior
+  now changed a bit, and `LocalHref` was added to replace the old, default
+  behavior of `Href`. See the migration doc for more info.
+* Removed `Sabre\DAVACL\Plugin::$allowAccessToNodesWithoutACL` setting.
+  Instead, you can provide a set of default ACL rules with
+  `Sabre\DAVACL\Plugin::setDefaultAcl()`.
+* Introduced `Sabre\DAVACL\ACLTrait` which contains a default implementation
+  of `Sabre\DAV\IACL` with some sane defaults. We're using this trait all over
+  the place now, reducing the amount of boilerplate.
+* Plugins can now control the "Supported Privilege Set".
+* Added Sharing, ICSExport and VCFExport plugins to `groupwareserver.php`
+  example.
+* The `{DAV:}all` privilege is now no longer abstract, so it can be assigned
+  directly. We're using the `{DAV:}all` privilege now in a lot of cases where
+  we before assigned both `{DAV:}read` and `{DAV:}write`.
+* Resources that are not collections no longer support the `{DAV:}bind` and
+  `{DAV:}unbind` privileges.
+* Corrected the CalDAV-scheduling related privileges.
+* Doing an `UNLOCK` no longer requires the `{DAV:}write-content` privilege.
+* Added a new `getPrincipalByUri` plugin event. Allowing plugins to request
+  quickly where a principal lives on a server.
+* Renamed `phpunit.xml` to `phpunit.xml.dist` to make local modifications easy.
+* Functionality from `IShareableCalendar` is merged into `ISharedCalendar`.
+* #751: Fixed XML responses from failing `MKCOL` requests.
+* #600: Support for `principal-match` ACL `REPORT`.
+* #599: Support for `acl-principal-prop-set` ACL `REPORT`.
+* #798: Added an index on `firstoccurence` field in MySQL CalDAV backend. This
+  should speed up common calendar-query requests.
+* #759: DAV\Client is now able to actually correctly resolve relative urls.
+* #671: We are no longer checking the `read-free-busy` privilege on individual
+  calendars during freebusy operations in the scheduling plugin. Instead, we
+  check the `schedule-query-freebusy` privilege on the target users' inbox,
+  which validates access for the entire account, per the spec.
+* The zip release ships with [sabre/vobject 4.1.0][vobj],
+  [sabre/http 4.2.1][http], [sabre/event 3.0.0][evnt],
+  [sabre/uri 1.1.0][uri] and [sabre/xml 1.4.1][xml].
+
+
+3.1.5 (????-??-??)
+------------------
+
+* Fixed: Creating a new calendar on some MySQL configurations caused an error.
+
+
+3.1.4 (2016-05-28)
+------------------
+
+* #834: Backport from `master`: Return vCards exactly as they were stored if
+  we don't need to convert in between versions. This should speed up many
+  large addressbook syncs sometimes up to 50%.
+* The zip release ships with [sabre/vobject 4.1.0][vobj],
+  [sabre/http 4.2.1][http], [sabre/event 3.0.0][evnt],
+  [sabre/uri 1.1.0][uri] and [sabre/xml 1.4.2][xml].
+
+
 3.1.3 (2016-04-06)
 ------------------
 
diff --git a/vendor/sabre/dav/README.md b/vendor/sabre/dav/README.md
index 278187b55..8edcd4073 100644
--- a/vendor/sabre/dav/README.md
+++ b/vendor/sabre/dav/README.md
@@ -1,10 +1,10 @@
-![sabre's logo](http://sabre.io/img/logo.png) SabreDAV
-======================================================
+![sabre's logo](http://sabre.io/img/logo.png) sabre/dav
+=======================================================
 
 Introduction
 ------------
 
-SabreDAV is the most popular WebDAV framework for PHP. Use it to create WebDAV, CalDAV and CardDAV servers.
+sabre/dav is the most popular WebDAV framework for PHP. Use it to create WebDAV, CalDAV and CardDAV servers.
 
 Full documentation can be found on the website:
 
@@ -16,6 +16,7 @@ Build status
 | branch       | status | minimum PHP version |
 | ------------ | ------ | ------------------- |
 | master       | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=master)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.5 |
+| 3.1          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=3.0)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.5 |
 | 3.0          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=3.0)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.4 |
 | 2.1          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=2.1)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.4 |
 | 2.0          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=2.0)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.4 |
@@ -23,6 +24,12 @@ Build status
 | 1.7          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=1.7)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.3 |
 | 1.6          | [![Build Status](https://travis-ci.org/fruux/sabre-dav.svg?branch=1.6)](https://travis-ci.org/fruux/sabre-dav) | PHP 5.3 |
 
+Documentation
+-------------
+
+* [Introduction](http://sabre.io/dav/).
+* [Installation](http://sabre.io/dav/install/).
+
 Made at fruux
 -------------
 
diff --git a/vendor/sabre/dav/bin/build.php b/vendor/sabre/dav/bin/build.php
index 82b1e7530..c4ba20941 100755..100644
--- a/vendor/sabre/dav/bin/build.php
+++ b/vendor/sabre/dav/bin/build.php
@@ -110,7 +110,7 @@ function test() {
 
     echo "  Running all unittests.\n";
     echo "  This may take a while.\n\n";
-    system(__DIR__ . '/phpunit --configuration ' . $baseDir . '/tests/phpunit.xml --stop-on-failure', $code);
+    system(__DIR__ . '/phpunit --configuration ' . $baseDir . '/tests/phpunit.xml.dist --stop-on-failure', $code);
     if ($code != 0) {
         echo "PHPUnit reported error code $code\n";
         die(1);
diff --git a/vendor/sabre/dav/bin/googlecode_upload.py b/vendor/sabre/dav/bin/googlecode_upload.py
index caafd5ded..caafd5ded 100755..100644
--- a/vendor/sabre/dav/bin/googlecode_upload.py
+++ b/vendor/sabre/dav/bin/googlecode_upload.py
diff --git a/vendor/sabre/dav/bin/migrateto17.php b/vendor/sabre/dav/bin/migrateto17.php
deleted file mode 100755
index a1173c584..000000000
--- a/vendor/sabre/dav/bin/migrateto17.php
+++ /dev/null
@@ -1,284 +0,0 @@
-#!/usr/bin/env php
-<?php
-
-echo "SabreDAV migrate script for version 1.7\n";
-
-if ($argc < 2) {
-
-    echo <<<HELLO
-
-This script help you migrate from a pre-1.7 database to 1.7 and later\n
-Both the 'calendarobjects' and 'calendars' tables will be upgraded.
-
-If you do not have this table, or don't use the default PDO CalDAV backend
-it's pointless to run this script.
-
-Keep in mind that some processing will be done on every single record of this
-table and in addition, ALTER TABLE commands will be executed.
-If you have a large calendarobjects table, this may mean that this process
-takes a while.
-
-Usage:
-
-php {$argv[0]} [pdo-dsn] [username] [password]
-
-For example:
-
-php {$argv[0]} "mysql:host=localhost;dbname=sabredav" root password
-php {$argv[0]} sqlite:data/sabredav.db
-
-HELLO;
-
-    exit();
-
-}
-
-// There's a bunch of places where the autoloader could be, so we'll try all of
-// them.
-$paths = [
-    __DIR__ . '/../vendor/autoload.php',
-    __DIR__ . '/../../../autoload.php',
-];
-
-foreach ($paths as $path) {
-    if (file_exists($path)) {
-        include $path;
-        break;
-    }
-}
-
-$dsn = $argv[1];
-$user = isset($argv[2]) ? $argv[2] : null;
-$pass = isset($argv[3]) ? $argv[3] : null;
-
-echo "Connecting to database: " . $dsn . "\n";
-
-$pdo = new PDO($dsn, $user, $pass);
-$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
-$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
-
-echo "Validating existing table layout\n";
-
-// The only cross-db way to do this, is to just fetch a single record.
-$row = $pdo->query("SELECT * FROM calendarobjects LIMIT 1")->fetch();
-
-if (!$row) {
-    echo "Error: This database did not have any records in the calendarobjects table, you should just recreate the table.\n";
-    exit(-1);
-}
-
-$requiredFields = [
-    'id',
-    'calendardata',
-    'uri',
-    'calendarid',
-    'lastmodified',
-];
-
-foreach ($requiredFields as $requiredField) {
-    if (!array_key_exists($requiredField, $row)) {
-        echo "Error: The current 'calendarobjects' table was missing a field we expected to exist.\n";
-        echo "For safety reasons, this process is stopped.\n";
-        exit(-1);
-    }
-}
-
-$fields17 = [
-    'etag',
-    'size',
-    'componenttype',
-    'firstoccurence',
-    'lastoccurence',
-];
-
-$found = 0;
-foreach ($fields17 as $field) {
-    if (array_key_exists($field, $row)) {
-        $found++;
-    }
-}
-
-if ($found === 0) {
-    echo "The database had the 1.6 schema. Table will now be altered.\n";
-    echo "This may take some time for large tables\n";
-
-    switch ($pdo->getAttribute(PDO::ATTR_DRIVER_NAME)) {
-
-        case 'mysql' :
-
-            $pdo->exec(<<<SQL
-ALTER TABLE calendarobjects
-ADD etag VARCHAR(32),
-ADD size INT(11) UNSIGNED,
-ADD componenttype VARCHAR(8),
-ADD firstoccurence INT(11) UNSIGNED,
-ADD lastoccurence INT(11) UNSIGNED
-SQL
-        );
-            break;
-            case 'sqlite' :
-                $pdo->exec('ALTER TABLE calendarobjects ADD etag text');
-                $pdo->exec('ALTER TABLE calendarobjects ADD size integer');
-                $pdo->exec('ALTER TABLE calendarobjects ADD componenttype TEXT');
-                $pdo->exec('ALTER TABLE calendarobjects ADD firstoccurence integer');
-                $pdo->exec('ALTER TABLE calendarobjects ADD lastoccurence integer');
-                break;
-
-        default :
-            die('This upgrade script does not support this driver (' . $pdo->getAttribute(PDO::ATTR_DRIVER_NAME) . ")\n");
-
-    }
-    echo "Database schema upgraded.\n";
-
-} elseif ($found === 5) {
-
-    echo "Database already had the 1.7 schema\n";
-
-} else {
-
-    echo "The database had $found out of 5 from the changes for 1.7. This is scary and unusual, so we have to abort.\n";
-    echo "You can manually try to upgrade the schema, and then run this script again.\n";
-    exit(-1);
-
-}
-
-echo "Now, we need to parse every record and pull out some information.\n";
-
-$result = $pdo->query('SELECT id, calendardata FROM calendarobjects');
-$stmt = $pdo->prepare('UPDATE calendarobjects SET etag = ?, size = ?, componenttype = ?, firstoccurence = ?, lastoccurence = ? WHERE id = ?');
-
-echo "Total records found: " . $result->rowCount() . "\n";
-$done = 0;
-$total = $result->rowCount();
-while ($row = $result->fetch()) {
-
-    try {
-        $newData = getDenormalizedData($row['calendardata']);
-    } catch (Exception $e) {
-        echo "===\nException caught will trying to parser calendarobject.\n";
-        echo "Error message: " . $e->getMessage() . "\n";
-        echo "Record id: " . $row['id'] . "\n";
-        echo "This record is ignored, you should inspect it to see if there's anything wrong.\n===\n";
-        continue;
-    }
-    $stmt->execute([
-        $newData['etag'],
-        $newData['size'],
-        $newData['componentType'],
-        $newData['firstOccurence'],
-        $newData['lastOccurence'],
-        $row['id'],
-    ]);
-    $done++;
-
-    if ($done % 500 === 0) {
-        echo "Completed: $done / $total\n";
-    }
-}
-echo "Completed: $done / $total\n";
-
-echo "Checking the calendars table needs changes.\n";
-$row = $pdo->query("SELECT * FROM calendars LIMIT 1")->fetch();
-
-if (array_key_exists('transparent', $row)) {
-
-    echo "The calendars table is already up to date\n";
-
-} else {
-
-    echo "Adding the 'transparent' field to the calendars table\n";
-
-    switch ($pdo->getAttribute(PDO::ATTR_DRIVER_NAME)) {
-
-        case 'mysql' :
-            $pdo->exec("ALTER TABLE calendars ADD transparent TINYINT(1) NOT NULL DEFAULT '0'");
-            break;
-        case 'sqlite' :
-            $pdo->exec("ALTER TABLE calendars ADD transparent bool");
-            break;
-
-        default :
-            die('This upgrade script does not support this driver (' . $pdo->getAttribute(PDO::ATTR_DRIVER_NAME) . ")\n");
-
-    }
-
-}
-
-echo "Process completed!\n";
-
-/**
- * Parses some information from calendar objects, used for optimized
- * calendar-queries.
- *
- * Blantently copied from Sabre\CalDAV\Backend\PDO
- *
- * Returns an array with the following keys:
- *   * etag
- *   * size
- *   * componentType
- *   * firstOccurence
- *   * lastOccurence
- *
- * @param string $calendarData
- * @return array
- */
-function getDenormalizedData($calendarData) {
-
-    $vObject = \Sabre\VObject\Reader::read($calendarData);
-    $componentType = null;
-    $component = null;
-    $firstOccurence = null;
-    $lastOccurence = null;
-    foreach ($vObject->getComponents() as $component) {
-        if ($component->name !== 'VTIMEZONE') {
-            $componentType = $component->name;
-            break;
-        }
-    }
-    if (!$componentType) {
-        throw new \Sabre\DAV\Exception\BadRequest('Calendar objects must have a VJOURNAL, VEVENT or VTODO component');
-    }
-    if ($componentType === 'VEVENT') {
-        $firstOccurence = $component->DTSTART->getDateTime()->getTimeStamp();
-        // Finding the last occurence is a bit harder
-        if (!isset($component->RRULE)) {
-            if (isset($component->DTEND)) {
-                $lastOccurence = $component->DTEND->getDateTime()->getTimeStamp();
-            } elseif (isset($component->DURATION)) {
-                $endDate = clone $component->DTSTART->getDateTime();
-                $endDate->add(\Sabre\VObject\DateTimeParser::parse($component->DURATION->value));
-                $lastOccurence = $endDate->getTimeStamp();
-            } elseif (!$component->DTSTART->hasTime()) {
-                $endDate = clone $component->DTSTART->getDateTime();
-                $endDate->modify('+1 day');
-                $lastOccurence = $endDate->getTimeStamp();
-            } else {
-                $lastOccurence = $firstOccurence;
-            }
-        } else {
-            $it = new \Sabre\VObject\Recur\EventIterator($vObject, (string)$component->UID);
-            $maxDate = new DateTime(\Sabre\CalDAV\Backend\PDO::MAX_DATE);
-            if ($it->isInfinite()) {
-                $lastOccurence = $maxDate->getTimeStamp();
-            } else {
-                $end = $it->getDtEnd();
-                while ($it->valid() && $end < $maxDate) {
-                    $end = $it->getDtEnd();
-                    $it->next();
-
-                }
-                $lastOccurence = $end->getTimeStamp();
-            }
-
-        }
-    }
-
-    return [
-        'etag'           => md5($calendarData),
-        'size'           => strlen($calendarData),
-        'componentType'  => $componentType,
-        'firstOccurence' => $firstOccurence,
-        'lastOccurence'  => $lastOccurence,
-    ];
-
-}
diff --git a/vendor/sabre/dav/bin/migrateto20.php b/vendor/sabre/dav/bin/migrateto20.php
index 77236804f..77236804f 100755..100644
--- a/vendor/sabre/dav/bin/migrateto20.php
+++ b/vendor/sabre/dav/bin/migrateto20.php
diff --git a/vendor/sabre/dav/bin/migrateto21.php b/vendor/sabre/dav/bin/migrateto21.php
index f42c4cf88..c81ee5cca 100755..100644
--- a/vendor/sabre/dav/bin/migrateto21.php
+++ b/vendor/sabre/dav/bin/migrateto21.php
@@ -169,10 +169,6 @@ switch ($driver) {
 )
 ');
         break;
-        $pdo->exec('
-            CREATE INDEX principaluri_uri ON calendarsubscriptions (principaluri, uri);
-        ');
-        break;
 }
 
 echo "Done.\n";
diff --git a/vendor/sabre/dav/bin/migrateto30.php b/vendor/sabre/dav/bin/migrateto30.php
index 9ca77c13c..9ca77c13c 100755..100644
--- a/vendor/sabre/dav/bin/migrateto30.php
+++ b/vendor/sabre/dav/bin/migrateto30.php
diff --git a/vendor/sabre/dav/bin/migrateto32.php b/vendor/sabre/dav/bin/migrateto32.php
new file mode 100644
index 000000000..7567aeb60
--- /dev/null
+++ b/vendor/sabre/dav/bin/migrateto32.php
@@ -0,0 +1,268 @@
+#!/usr/bin/env php
+<?php
+
+echo "SabreDAV migrate script for version 3.2\n";
+
+if ($argc < 2) {
+
+    echo <<<HELLO
+
+This script help you migrate from a 3.1 database to 3.2 and later
+
+Changes:
+* Created a new calendarinstances table to support calendar sharing.
+* Remove a lot of columns from calendars.
+
+Keep in mind that ALTER TABLE commands will be executed. If you have a large
+dataset this may mean that this process takes a while.
+
+Make a back-up first. This script has been tested, but the amount of
+potential variants are extremely high, so it's impossible to deal with every
+possible situation.
+
+In the worst case, you will lose all your data. This is not an overstatement.
+
+Lastly, if you are upgrading from an older version than 3.1, make sure you run
+the earlier migration script first. Migration scripts must be ran in order.
+
+Usage:
+
+php {$argv[0]} [pdo-dsn] [username] [password]
+
+For example:
+
+php {$argv[0]} "mysql:host=localhost;dbname=sabredav" root password
+php {$argv[0]} sqlite:data/sabredav.db
+
+HELLO;
+
+    exit();
+
+}
+
+// There's a bunch of places where the autoloader could be, so we'll try all of
+// them.
+$paths = [
+    __DIR__ . '/../vendor/autoload.php',
+    __DIR__ . '/../../../autoload.php',
+];
+
+foreach ($paths as $path) {
+    if (file_exists($path)) {
+        include $path;
+        break;
+    }
+}
+
+$dsn = $argv[1];
+$user = isset($argv[2]) ? $argv[2] : null;
+$pass = isset($argv[3]) ? $argv[3] : null;
+
+$backupPostfix = time();
+
+echo "Connecting to database: " . $dsn . "\n";
+
+$pdo = new PDO($dsn, $user, $pass);
+$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
+
+$driver = $pdo->getAttribute(PDO::ATTR_DRIVER_NAME);
+
+switch ($driver) {
+
+    case 'mysql' :
+        echo "Detected MySQL.\n";
+        break;
+    case 'sqlite' :
+        echo "Detected SQLite.\n";
+        break;
+    default :
+        echo "Error: unsupported driver: " . $driver . "\n";
+        die(-1);
+}
+
+echo "Creating 'calendarinstances'\n";
+$addValueType = false;
+try {
+    $result = $pdo->query('SELECT * FROM calendarinstances LIMIT 1');
+    $result->fetch(\PDO::FETCH_ASSOC);
+    echo "calendarinstances exists. Assuming this part of the migration has already been done.\n";
+} catch (Exception $e) {
+    echo "calendarinstances does not yet exist. Creating table and migrating data.\n";
+
+    switch ($driver) {
+        case 'mysql' :
+            $pdo->exec(<<<SQL
+CREATE TABLE calendarinstances (
+    id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+    calendarid INTEGER UNSIGNED NOT NULL,
+    principaluri VARBINARY(100),
+    access TINYINT(1) NOT NULL DEFAULT '1' COMMENT '1 = owner, 2 = read, 3 = readwrite',
+    displayname VARCHAR(100),
+    uri VARBINARY(200),
+    description TEXT,
+    calendarorder INT(11) UNSIGNED NOT NULL DEFAULT '0',
+    calendarcolor VARBINARY(10),
+    timezone TEXT,
+    transparent TINYINT(1) NOT NULL DEFAULT '0',
+    share_href VARBINARY(100),
+    share_displayname VARCHAR(100),
+    share_invitestatus TINYINT(1) NOT NULL DEFAULT '2' COMMENT '1 = noresponse, 2 = accepted, 3 = declined, 4 = invalid',
+    UNIQUE(principaluri, uri),
+    UNIQUE(calendarid, principaluri),
+    UNIQUE(calendarid, share_href)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+SQL
+        );
+            $pdo->exec("
+INSERT INTO calendarinstances
+    (
+        calendarid,
+        principaluri,
+        access,
+        displayname,
+        uri,
+        description,
+        calendarorder,
+        calendarcolor,
+        transparent
+    )
+SELECT
+    id,
+    principaluri,
+    1,
+    displayname,
+    uri,
+    description,
+    calendarorder,
+    calendarcolor,
+    transparent
+FROM calendars
+");
+            break;
+        case 'sqlite' :
+            $pdo->exec(<<<SQL
+CREATE TABLE calendarinstances (
+    id integer primary key asc NOT NULL,
+    calendarid integer,
+    principaluri text,
+    access integer COMMENT '1 = owner, 2 = read, 3 = readwrite' NOT NULL DEFAULT '1',
+    displayname text,
+    uri text NOT NULL,
+    description text,
+    calendarorder integer,
+    calendarcolor text,
+    timezone text,
+    transparent bool,
+    share_href text,
+    share_displayname text,
+    share_invitestatus integer DEFAULT '2',
+    UNIQUE (principaluri, uri),
+    UNIQUE (calendarid, principaluri),
+    UNIQUE (calendarid, share_href)
+);
+SQL
+        );
+            $pdo->exec("
+INSERT INTO calendarinstances
+    (
+        calendarid,
+        principaluri,
+        access,
+        displayname,
+        uri,
+        description,
+        calendarorder,
+        calendarcolor,
+        transparent
+    )
+SELECT
+    id,
+    principaluri,
+    1,
+    displayname,
+    uri,
+    description,
+    calendarorder,
+    calendarcolor,
+    transparent
+FROM calendars
+");
+            break;
+    }
+
+}
+try {
+    $result = $pdo->query('SELECT * FROM calendars LIMIT 1');
+    $row = $result->fetch(\PDO::FETCH_ASSOC);
+
+    if (!$row) {
+        echo "Source table is empty.\n";
+        $migrateCalendars = true;
+    }
+
+    $columnCount = count($row);
+    if ($columnCount === 3) {
+        echo "The calendars table has 3 columns already. Assuming this part of the migration was already done.\n";
+        $migrateCalendars = false;
+    } else {
+        echo "The calendars table has " . $columnCount . " columns.\n";
+        $migrateCalendars = true;
+    }
+
+} catch (Exception $e) {
+    echo "calendars table does not exist. This is a major problem. Exiting.\n";
+    exit(-1);
+}
+
+if ($migrateCalendars) {
+
+    $calendarBackup = 'calendars_3_1_' . $backupPostfix;
+    echo "Backing up 'calendars' to '", $calendarBackup, "'\n";
+
+    switch ($driver) {
+        case 'mysql' :
+            $pdo->exec('RENAME TABLE calendars TO ' . $calendarBackup);
+            break;
+        case 'sqlite' :
+            $pdo->exec('ALTER TABLE calendars RENAME TO ' . $calendarBackup);
+            break;
+
+    }
+
+    echo "Creating new calendars table.\n";
+    switch ($driver) {
+        case 'mysql' :
+            $pdo->exec(<<<SQL
+CREATE TABLE calendars (
+    id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+    synctoken INTEGER UNSIGNED NOT NULL DEFAULT '1',
+    components VARBINARY(21)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
+SQL
+);
+            break;
+        case 'sqlite' :
+            $pdo->exec(<<<SQL
+CREATE TABLE calendars (
+    id integer primary key asc NOT NULL,
+    synctoken integer DEFAULT 1 NOT NULL,
+    components text NOT NULL
+);
+SQL
+        );
+            break;
+
+    }
+
+    echo "Migrating data from old to new table\n";
+
+    $pdo->exec(<<<SQL
+INSERT INTO calendars (id, synctoken, components) SELECT id, synctoken, COALESCE(components,"VEVENT,VTODO,VJOURNAL") as components FROM $calendarBackup
+SQL
+    );
+
+}
+
+
+echo "Upgrade to 3.2 schema completed.\n";
diff --git a/vendor/sabre/dav/bin/naturalselection b/vendor/sabre/dav/bin/naturalselection
index 52720e31e..7e20439c1 100755
--- a/vendor/sabre/dav/bin/naturalselection
+++ b/vendor/sabre/dav/bin/naturalselection
@@ -107,7 +107,7 @@ def main():
     parser.add_option(
         '-m', '--min-erase',
         help="Minimum number of bytes to erase when the threshold is reached. " +
-            "Setting this option higher will reduce the amount of times the cache directory will need to be scanned. " +
+            "Setting this option higher will reduce the number of times the cache directory will need to be scanned. " +
             "(the default is 1073741824, which is 1GB.)",
         type="int",
         dest="min_erase",
diff --git a/vendor/sabre/dav/bin/sabredav.php b/vendor/sabre/dav/bin/sabredav.php
index 950075d1a..950075d1a 100755..100644
--- a/vendor/sabre/dav/bin/sabredav.php
+++ b/vendor/sabre/dav/bin/sabredav.php
diff --git a/vendor/sabre/dav/examples/addressbookserver.php b/vendor/sabre/dav/examples/addressbookserver.php
deleted file mode 100644
index 6d1c9b26c..000000000
--- a/vendor/sabre/dav/examples/addressbookserver.php
+++ /dev/null
@@ -1,57 +0,0 @@
-<?php
-
-/*
-
-Addressbook/CardDAV server example
-
-This server features CardDAV support
-
-*/
-
-// settings
-date_default_timezone_set('Canada/Eastern');
-
-// Make sure this setting is turned on and reflect the root url for your WebDAV server.
-// This can be for example the root / or a complete path to your server script
-$baseUri = '/';
-
-/* Database */
-$pdo = new PDO('sqlite:data/db.sqlite');
-$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
-
-//Mapping PHP errors to exceptions
-function exception_error_handler($errno, $errstr, $errfile, $errline) {
-    throw new ErrorException($errstr, 0, $errno, $errfile, $errline);
-}
-set_error_handler("exception_error_handler");
-
-// Autoloader
-require_once 'vendor/autoload.php';
-
-// Backends
-$authBackend      = new Sabre\DAV\Auth\Backend\PDO($pdo);
-$principalBackend = new Sabre\DAVACL\PrincipalBackend\PDO($pdo);
-$carddavBackend   = new Sabre\CardDAV\Backend\PDO($pdo);
-//$caldavBackend    = new Sabre\CalDAV\Backend\PDO($pdo);
-
-// Setting up the directory tree //
-$nodes = [
-    new Sabre\DAVACL\PrincipalCollection($principalBackend),
-//    new Sabre\CalDAV\CalendarRoot($authBackend, $caldavBackend),
-    new Sabre\CardDAV\AddressBookRoot($principalBackend, $carddavBackend),
-];
-
-// The object tree needs in turn to be passed to the server class
-$server = new Sabre\DAV\Server($nodes);
-$server->setBaseUri($baseUri);
-
-// Plugins
-$server->addPlugin(new Sabre\DAV\Auth\Plugin($authBackend));
-$server->addPlugin(new Sabre\DAV\Browser\Plugin());
-//$server->addPlugin(new Sabre\CalDAV\Plugin());
-$server->addPlugin(new Sabre\CardDAV\Plugin());
-$server->addPlugin(new Sabre\DAVACL\Plugin());
-$server->addPlugin(new Sabre\DAV\Sync\Plugin());
-
-// And off we go!
-$server->exec();
diff --git a/vendor/sabre/dav/examples/sql/mysql.addressbook.sql b/vendor/sabre/dav/examples/sql/mysql.addressbook.sql
deleted file mode 100644
index 9ec88babe..000000000
--- a/vendor/sabre/dav/examples/sql/mysql.addressbook.sql
+++ /dev/null
@@ -1,28 +0,0 @@
-CREATE TABLE addressbooks (
-    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    principaluri VARBINARY(255),
-    displayname VARCHAR(255),
-    uri VARBINARY(200),
-    description TEXT,
-    synctoken INT(11) UNSIGNED NOT NULL DEFAULT '1',
-    UNIQUE(principaluri(100), uri(100))
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
-
-CREATE TABLE cards (
-    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    addressbookid INT(11) UNSIGNED NOT NULL,
-    carddata MEDIUMBLOB,
-    uri VARBINARY(200),
-    lastmodified INT(11) UNSIGNED,
-    etag VARBINARY(32),
-    size INT(11) UNSIGNED NOT NULL
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
-
-CREATE TABLE addressbookchanges (
-    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    uri VARBINARY(200) NOT NULL,
-    synctoken INT(11) UNSIGNED NOT NULL,
-    addressbookid INT(11) UNSIGNED NOT NULL,
-    operation TINYINT(1) NOT NULL,
-    INDEX addressbookid_synctoken (addressbookid, synctoken)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
diff --git a/vendor/sabre/dav/examples/sql/mysql.calendars.sql b/vendor/sabre/dav/examples/sql/mysql.calendars.sql
deleted file mode 100644
index d41f11076..000000000
--- a/vendor/sabre/dav/examples/sql/mysql.calendars.sql
+++ /dev/null
@@ -1,64 +0,0 @@
-CREATE TABLE calendarobjects (
-    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    calendardata MEDIUMBLOB,
-    uri VARBINARY(200),
-    calendarid INTEGER UNSIGNED NOT NULL,
-    lastmodified INT(11) UNSIGNED,
-    etag VARBINARY(32),
-    size INT(11) UNSIGNED NOT NULL,
-    componenttype VARBINARY(8),
-    firstoccurence INT(11) UNSIGNED,
-    lastoccurence INT(11) UNSIGNED,
-    uid VARBINARY(200),
-    UNIQUE(calendarid, uri)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
-
-CREATE TABLE calendars (
-    id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    principaluri VARBINARY(100),
-    displayname VARCHAR(100),
-    uri VARBINARY(200),
-    synctoken INTEGER UNSIGNED NOT NULL DEFAULT '1',
-    description TEXT,
-    calendarorder INT(11) UNSIGNED NOT NULL DEFAULT '0',
-    calendarcolor VARBINARY(10),
-    timezone TEXT,
-    components VARBINARY(21),
-    transparent TINYINT(1) NOT NULL DEFAULT '0',
-    UNIQUE(principaluri, uri)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
-
-CREATE TABLE calendarchanges (
-    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    uri VARBINARY(200) NOT NULL,
-    synctoken INT(11) UNSIGNED NOT NULL,
-    calendarid INT(11) UNSIGNED NOT NULL,
-    operation TINYINT(1) NOT NULL,
-    INDEX calendarid_synctoken (calendarid, synctoken)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
-
-CREATE TABLE calendarsubscriptions (
-    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    uri VARBINARY(200) NOT NULL,
-    principaluri VARBINARY(100) NOT NULL,
-    source TEXT,
-    displayname VARCHAR(100),
-    refreshrate VARCHAR(10),
-    calendarorder INT(11) UNSIGNED NOT NULL DEFAULT '0',
-    calendarcolor VARBINARY(10),
-    striptodos TINYINT(1) NULL,
-    stripalarms TINYINT(1) NULL,
-    stripattachments TINYINT(1) NULL,
-    lastmodified INT(11) UNSIGNED,
-    UNIQUE(principaluri, uri)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
-
-CREATE TABLE schedulingobjects (
-    id INT(11) UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    principaluri VARBINARY(255),
-    calendardata MEDIUMBLOB,
-    uri VARBINARY(200),
-    lastmodified INT(11) UNSIGNED,
-    etag VARBINARY(32),
-    size INT(11) UNSIGNED NOT NULL
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
diff --git a/vendor/sabre/dav/examples/sql/mysql.locks.sql b/vendor/sabre/dav/examples/sql/mysql.locks.sql
deleted file mode 100644
index 96a3a88d9..000000000
--- a/vendor/sabre/dav/examples/sql/mysql.locks.sql
+++ /dev/null
@@ -1,12 +0,0 @@
-CREATE TABLE locks (
-    id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    owner VARCHAR(100),
-    timeout INTEGER UNSIGNED,
-    created INTEGER,
-    token VARBINARY(100),
-    scope TINYINT,
-    depth TINYINT,
-    uri VARBINARY(1000),
-    INDEX(token),
-    INDEX(uri(100))
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
diff --git a/vendor/sabre/dav/examples/sql/mysql.principals.sql b/vendor/sabre/dav/examples/sql/mysql.principals.sql
deleted file mode 100644
index ea0d16a27..000000000
--- a/vendor/sabre/dav/examples/sql/mysql.principals.sql
+++ /dev/null
@@ -1,20 +0,0 @@
-CREATE TABLE principals (
-    id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    uri VARBINARY(200) NOT NULL,
-    email VARBINARY(80),
-    displayname VARCHAR(80),
-    UNIQUE(uri)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
-
-CREATE TABLE groupmembers (
-    id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    principal_id INTEGER UNSIGNED NOT NULL,
-    member_id INTEGER UNSIGNED NOT NULL,
-    UNIQUE(principal_id, member_id)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
-
-INSERT INTO principals (uri,email,displayname) VALUES
-('principals/admin', 'admin@example.org','Administrator'),
-('principals/admin/calendar-proxy-read', null, null),
-('principals/admin/calendar-proxy-write', null, null);
-
diff --git a/vendor/sabre/dav/examples/sql/mysql.users.sql b/vendor/sabre/dav/examples/sql/mysql.users.sql
deleted file mode 100644
index 22ac312d5..000000000
--- a/vendor/sabre/dav/examples/sql/mysql.users.sql
+++ /dev/null
@@ -1,9 +0,0 @@
-CREATE TABLE users (
-    id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-    username VARBINARY(50),
-    digesta1 VARBINARY(32),
-    UNIQUE(username)
-) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
-
-INSERT INTO users (username,digesta1) VALUES
-('admin',  '87fd274b7b6c01e48d7c2f965da8ddf7');
diff --git a/vendor/sabre/dav/examples/sql/pgsql.addressbook.sql b/vendor/sabre/dav/examples/sql/pgsql.addressbook.sql
deleted file mode 100644
index ef2cc5b9a..000000000
--- a/vendor/sabre/dav/examples/sql/pgsql.addressbook.sql
+++ /dev/null
@@ -1,52 +0,0 @@
-CREATE TABLE addressbooks (
-    id SERIAL NOT NULL,
-    principaluri VARCHAR(255),
-    displayname VARCHAR(255),
-    uri VARCHAR(200),
-    description TEXT,
-    synctoken INTEGER NOT NULL DEFAULT 1
-);
-
-ALTER TABLE ONLY addressbooks
-    ADD CONSTRAINT addressbooks_pkey PRIMARY KEY (id);
-
-CREATE UNIQUE INDEX addressbooks_ukey
-    ON addressbooks USING btree (principaluri, uri);
-
-CREATE TABLE cards (
-    id SERIAL NOT NULL,
-    addressbookid INTEGER NOT NULL,
-    carddata TEXT,
-    uri VARCHAR(200),
-    lastmodified INTEGER,
-    etag VARCHAR(32),
-    size INTEGER NOT NULL
-);
-
-ALTER TABLE ONLY cards
-    ADD CONSTRAINT cards_pkey PRIMARY KEY (id);
-
-CREATE UNIQUE INDEX cards_ukey
-    ON cards USING btree (addressbookid, uri);
-
-ALTER TABLE ONLY cards
-    ADD CONSTRAINT cards_addressbookid_fkey FOREIGN KEY (addressbookid) REFERENCES addressbooks(id)
-        ON DELETE CASCADE;
-
-CREATE TABLE addressbookchanges (
-    id SERIAL NOT NULL,
-    uri VARCHAR(200) NOT NULL,
-    synctoken INTEGER NOT NULL,
-    addressbookid INTEGER NOT NULL,
-    operation SMALLINT NOT NULL
-);
-
-ALTER TABLE ONLY addressbookchanges
-    ADD CONSTRAINT addressbookchanges_pkey PRIMARY KEY (id);
-
-CREATE INDEX addressbookchanges_addressbookid_synctoken_ix
-    ON addressbookchanges USING btree (addressbookid, synctoken);
-
-ALTER TABLE ONLY addressbookchanges
-    ADD CONSTRAINT addressbookchanges_addressbookid_fkey FOREIGN KEY (addressbookid) REFERENCES addressbooks(id)
-        ON DELETE CASCADE;
diff --git a/vendor/sabre/dav/examples/sql/pgsql.calendars.sql b/vendor/sabre/dav/examples/sql/pgsql.calendars.sql
deleted file mode 100644
index d31084b86..000000000
--- a/vendor/sabre/dav/examples/sql/pgsql.calendars.sql
+++ /dev/null
@@ -1,93 +0,0 @@
-CREATE TABLE calendars (
-    id SERIAL NOT NULL,
-    principaluri VARCHAR(100),
-    displayname VARCHAR(100),
-    uri VARCHAR(200),
-    synctoken INTEGER NOT NULL DEFAULT 1,
-    description TEXT,
-    calendarorder INTEGER NOT NULL DEFAULT 0,
-    calendarcolor VARCHAR(10),
-    timezone TEXT,
-    components VARCHAR(20),
-    uid VARCHAR(200),
-    transparent SMALLINT NOT NULL DEFAULT '0'
-);
-
-ALTER TABLE ONLY calendars
-    ADD CONSTRAINT calendars_pkey PRIMARY KEY (id);
-
-CREATE UNIQUE INDEX calendars_ukey
-    ON calendars USING btree (principaluri, uri);
-
-CREATE TABLE calendarobjects (
-    id SERIAL NOT NULL,
-    calendardata TEXT,
-    uri VARCHAR(200),
-    calendarid INTEGER NOT NULL,
-    lastmodified INTEGER,
-    etag VARCHAR(32),
-    size INTEGER NOT NULL,
-    componenttype VARCHAR(8),
-    firstoccurence INTEGER,
-    lastoccurence INTEGER,
-    uid VARCHAR(200)
-);
-
-ALTER TABLE ONLY calendarobjects
-    ADD CONSTRAINT calendarobjects_pkey PRIMARY KEY (id);
-
-CREATE UNIQUE INDEX calendarobjects_ukey
-    ON calendarobjects USING btree (calendarid, uri);
-
-ALTER TABLE ONLY calendarobjects
-    ADD CONSTRAINT calendarobjects_calendarid_fkey FOREIGN KEY (calendarid) REFERENCES calendars(id)
-        ON DELETE CASCADE;
-
-CREATE TABLE calendarsubscriptions (
-    id SERIAL NOT NULL,
-    uri VARCHAR(200) NOT NULL,
-    principaluri VARCHAR(100) NOT NULL,
-    source TEXT,
-    displayname VARCHAR(100),
-    refreshrate VARCHAR(10),
-    calendarorder INTEGER NOT NULL DEFAULT 0,
-    calendarcolor VARCHAR(10),
-    striptodos SMALLINT NULL,
-    stripalarms SMALLINT NULL,
-    stripattachments SMALLINT NULL,
-    lastmodified INTEGER
-);
-
-ALTER TABLE ONLY calendarsubscriptions
-    ADD CONSTRAINT calendarsubscriptions_pkey PRIMARY KEY (id);
-
-CREATE UNIQUE INDEX calendarsubscriptions_ukey
-    ON calendarsubscriptions USING btree (principaluri, uri);
-
-CREATE TABLE calendarchanges (
-    id SERIAL NOT NULL,
-    uri VARCHAR(200) NOT NULL,
-    synctoken INTEGER NOT NULL,
-    calendarid INTEGER NOT NULL,
-    operation SMALLINT NOT NULL DEFAULT 0
-);
-
-ALTER TABLE ONLY calendarchanges
-    ADD CONSTRAINT calendarchanges_pkey PRIMARY KEY (id);
-
-CREATE INDEX calendarchanges_calendarid_synctoken_ix
-    ON calendarchanges USING btree (calendarid, synctoken);
-
-ALTER TABLE ONLY calendarchanges
-    ADD CONSTRAINT calendarchanges_calendar_fk FOREIGN KEY (calendarid) REFERENCES calendars(id)
-        ON DELETE CASCADE;
-
-CREATE TABLE schedulingobjects (
-    id SERIAL NOT NULL,
-    principaluri VARCHAR(255),
-    calendardata BYTEA,
-    uri VARCHAR(200),
-    lastmodified INTEGER,
-    etag VARCHAR(32),
-    size INTEGER NOT NULL
-);
diff --git a/vendor/sabre/dav/examples/sql/pgsql.locks.sql b/vendor/sabre/dav/examples/sql/pgsql.locks.sql
deleted file mode 100644
index 0290528ce..000000000
--- a/vendor/sabre/dav/examples/sql/pgsql.locks.sql
+++ /dev/null
@@ -1,19 +0,0 @@
-CREATE TABLE locks (
-    id SERIAL NOT NULL,
-    owner VARCHAR(100),
-    timeout INTEGER,
-    created INTEGER,
-    token VARCHAR(100),
-    scope SMALLINT,
-    depth SMALLINT,
-    uri TEXT
-);
-
-ALTER TABLE ONLY locks
-    ADD CONSTRAINT locks_pkey PRIMARY KEY (id);
-
-CREATE INDEX locks_token_ix
-    ON locks USING btree (token);
-
-CREATE INDEX locks_uri_ix
-    ON locks USING btree (uri);
diff --git a/vendor/sabre/dav/examples/sql/pgsql.principals.sql b/vendor/sabre/dav/examples/sql/pgsql.principals.sql
deleted file mode 100644
index 9157acde0..000000000
--- a/vendor/sabre/dav/examples/sql/pgsql.principals.sql
+++ /dev/null
@@ -1,38 +0,0 @@
-CREATE TABLE principals (
-    id SERIAL NOT NULL,
-    uri VARCHAR(200) NOT NULL,
-    email VARCHAR(80),
-    displayname VARCHAR(80)
-);
-
-ALTER TABLE ONLY principals
-    ADD CONSTRAINT principals_pkey PRIMARY KEY (id);
-
-CREATE UNIQUE INDEX principals_ukey
-    ON principals USING btree (uri);
-
-CREATE TABLE groupmembers (
-    id SERIAL NOT NULL,
-    principal_id INTEGER NOT NULL,
-    member_id INTEGER NOT NULL
-);
-
-ALTER TABLE ONLY groupmembers
-    ADD CONSTRAINT groupmembers_pkey PRIMARY KEY (id);
-
-CREATE UNIQUE INDEX groupmembers_ukey
-    ON groupmembers USING btree (principal_id, member_id);
-
-ALTER TABLE ONLY groupmembers
-    ADD CONSTRAINT groupmembers_principal_id_fkey FOREIGN KEY (principal_id) REFERENCES principals(id)
-        ON DELETE CASCADE;
-
-ALTER TABLE ONLY groupmembers
-    ADD CONSTRAINT groupmembers_member_id_id_fkey FOREIGN KEY (member_id) REFERENCES principals(id)
-        ON DELETE CASCADE;
-
-INSERT INTO principals (uri,email,displayname) VALUES
-('principals/admin', 'admin@example.org','Administrator'),
-('principals/admin/calendar-proxy-read', null, null),
-('principals/admin/calendar-proxy-write', null, null);
-
diff --git a/vendor/sabre/dav/examples/sql/pgsql.users.sql b/vendor/sabre/dav/examples/sql/pgsql.users.sql
deleted file mode 100644
index 9d6047b8c..000000000
--- a/vendor/sabre/dav/examples/sql/pgsql.users.sql
+++ /dev/null
@@ -1,14 +0,0 @@
-CREATE TABLE users (
-    id SERIAL NOT NULL,
-    username VARCHAR(50),
-    digesta1 VARCHAR(32)
-);
-
-ALTER TABLE ONLY users
-    ADD CONSTRAINT users_pkey PRIMARY KEY (id);
-
-CREATE UNIQUE INDEX users_ukey
-    ON users USING btree (username);
-
-INSERT INTO users (username,digesta1) VALUES
-('admin',  '87fd274b7b6c01e48d7c2f965da8ddf7');
diff --git a/vendor/sabre/dav/examples/sql/sqlite.addressbooks.sql b/vendor/sabre/dav/examples/sql/sqlite.addressbooks.sql
deleted file mode 100644
index 0baed8bfb..000000000
--- a/vendor/sabre/dav/examples/sql/sqlite.addressbooks.sql
+++ /dev/null
@@ -1,28 +0,0 @@
-CREATE TABLE addressbooks (
-    id integer primary key asc NOT NULL,
-    principaluri text NOT NULL,
-    displayname text,
-    uri text NOT NULL,
-    description text,
-    synctoken integer DEFAULT 1 NOT NULL
-);
-
-CREATE TABLE cards (
-    id integer primary key asc NOT NULL,
-    addressbookid integer NOT NULL,
-    carddata blob,
-    uri text NOT NULL,
-    lastmodified integer,
-    etag text,
-    size integer
-);
-
-CREATE TABLE addressbookchanges (
-    id integer primary key asc NOT NULL,
-    uri text,
-    synctoken integer NOT NULL,
-    addressbookid integer NOT NULL,
-    operation integer NOT NULL
-);
-
-CREATE INDEX addressbookid_synctoken ON addressbookchanges (addressbookid, synctoken);
diff --git a/vendor/sabre/dav/examples/sql/sqlite.calendars.sql b/vendor/sabre/dav/examples/sql/sqlite.calendars.sql
deleted file mode 100644
index a8654032d..000000000
--- a/vendor/sabre/dav/examples/sql/sqlite.calendars.sql
+++ /dev/null
@@ -1,64 +0,0 @@
-CREATE TABLE calendarobjects (
-    id integer primary key asc NOT NULL,
-    calendardata blob NOT NULL,
-    uri text NOT NULL,
-    calendarid integer NOT NULL,
-    lastmodified integer NOT NULL,
-    etag text NOT NULL,
-    size integer NOT NULL,
-    componenttype text,
-    firstoccurence integer,
-    lastoccurence integer,
-    uid text
-);
-
-CREATE TABLE calendars (
-    id integer primary key asc NOT NULL,
-    principaluri text NOT NULL,
-    displayname text,
-    uri text NOT NULL,
-    synctoken integer DEFAULT 1 NOT NULL,
-    description text,
-    calendarorder integer,
-    calendarcolor text,
-    timezone text,
-    components text NOT NULL,
-    transparent bool
-);
-
-CREATE TABLE calendarchanges (
-    id integer primary key asc NOT NULL,
-    uri text,
-    synctoken integer NOT NULL,
-    calendarid integer NOT NULL,
-    operation integer NOT NULL
-);
-
-CREATE INDEX calendarid_synctoken ON calendarchanges (calendarid, synctoken);
-
-CREATE TABLE calendarsubscriptions (
-    id integer primary key asc NOT NULL,
-    uri text NOT NULL,
-    principaluri text NOT NULL,
-    source text NOT NULL,
-    displayname text,
-    refreshrate text,
-    calendarorder integer,
-    calendarcolor text,
-    striptodos bool,
-    stripalarms bool,
-    stripattachments bool,
-    lastmodified int
-);
-
-CREATE TABLE schedulingobjects (
-    id integer primary key asc NOT NULL,
-    principaluri text NOT NULL,
-    calendardata blob,
-    uri text NOT NULL,
-    lastmodified integer,
-    etag text NOT NULL,
-    size integer NOT NULL
-);
-
-CREATE INDEX principaluri_uri ON calendarsubscriptions (principaluri, uri);
diff --git a/vendor/sabre/dav/examples/sql/sqlite.locks.sql b/vendor/sabre/dav/examples/sql/sqlite.locks.sql
deleted file mode 100644
index 622baea42..000000000
--- a/vendor/sabre/dav/examples/sql/sqlite.locks.sql
+++ /dev/null
@@ -1,12 +0,0 @@
-BEGIN TRANSACTION;
-CREATE TABLE locks (
-	id integer primary key asc NOT NULL,
-	owner text,
-	timeout integer,
-	created integer,
-	token text,
-	scope integer,
-	depth integer,
-	uri text
-);
-COMMIT;
diff --git a/vendor/sabre/dav/examples/sql/sqlite.principals.sql b/vendor/sabre/dav/examples/sql/sqlite.principals.sql
deleted file mode 100644
index 4105156f8..000000000
--- a/vendor/sabre/dav/examples/sql/sqlite.principals.sql
+++ /dev/null
@@ -1,20 +0,0 @@
-CREATE TABLE principals (
-    id INTEGER PRIMARY KEY ASC NOT NULL,
-    uri TEXT NOT NULL,
-    email TEXT,
-    displayname TEXT,
-    UNIQUE(uri)
-);
-
-CREATE TABLE groupmembers (
-    id INTEGER PRIMARY KEY ASC NOT NULL,
-    principal_id INTEGER NOT NULL,
-    member_id INTEGER NOT NULL,
-    UNIQUE(principal_id, member_id)
-);
-
-
-INSERT INTO principals (uri,email,displayname) VALUES ('principals/admin', 'admin@example.org','Administrator');
-INSERT INTO principals (uri,email,displayname) VALUES ('principals/admin/calendar-proxy-read', null, null);
-INSERT INTO principals (uri,email,displayname) VALUES ('principals/admin/calendar-proxy-write', null, null);
-
diff --git a/vendor/sabre/dav/examples/sql/sqlite.users.sql b/vendor/sabre/dav/examples/sql/sqlite.users.sql
deleted file mode 100644
index 5597b058a..000000000
--- a/vendor/sabre/dav/examples/sql/sqlite.users.sql
+++ /dev/null
@@ -1,9 +0,0 @@
-CREATE TABLE users (
-	id integer primary key asc NOT NULL,
-	username TEXT NOT NULL,
-	digesta1 TEXT NOT NULL,
-	UNIQUE(username)
-);
-
-INSERT INTO users (username,digesta1) VALUES
-('admin',  '87fd274b7b6c01e48d7c2f965da8ddf7');
diff --git a/vendor/sabre/dav/examples/webserver/apache2_htaccess.conf b/vendor/sabre/dav/examples/webserver/apache2_htaccess.conf
deleted file mode 100644
index c5f29ba80..000000000
--- a/vendor/sabre/dav/examples/webserver/apache2_htaccess.conf
+++ /dev/null
@@ -1,16 +0,0 @@
-RewriteEngine On
-# This makes every request go to server.php
-RewriteRule (.*) server.php [L]
-
-# Output buffering needs to be off, to prevent high memory usage
-php_flag output_buffering off
-
-# This is also to prevent high memory usage
-php_flag always_populate_raw_post_data off
-
-# This is almost a given, but magic quotes is *still* on on some
-# linux distributions
-php_flag magic_quotes_gpc off
-
-# SabreDAV is not compatible with mbstring function overloading
-php_flag mbstring.func_overload off
diff --git a/vendor/sabre/dav/examples/webserver/apache2_vhost.conf b/vendor/sabre/dav/examples/webserver/apache2_vhost.conf
deleted file mode 100644
index 74289641e..000000000
--- a/vendor/sabre/dav/examples/webserver/apache2_vhost.conf
+++ /dev/null
@@ -1,29 +0,0 @@
-# This is a sample configuration to setup a dedicated Apache vhost for WebDAV.
-#
-# The main thing that should be configured is the servername, and the path to
-# your SabreDAV installation (DocumentRoot).
-#
-# This configuration assumed mod_php5 is used, as it sets a few default php
-# settings as well.
-<VirtualHost *:*>
-
-    # Don't forget to change the server name
-    # ServerName dav.example.org
-
-    # The DocumentRoot is also required
-    # DocumentRoot /home/sabredav/
-
-    RewriteEngine On
-    # This makes every request go to server.php
-    RewriteRule ^/(.*)$ /server.php [L]
-
-    # Output buffering needs to be off, to prevent high memory usage
-    php_flag output_buffering off
-
-    # This is also to prevent high memory usage
-    php_flag always_populate_raw_post_data off
-
-    # SabreDAV is not compatible with mbstring function overloading
-    php_flag mbstring.func_overload off
-
-</VirtualHost *:*>
diff --git a/vendor/sabre/dav/examples/webserver/apache2_vhost_cgi.conf b/vendor/sabre/dav/examples/webserver/apache2_vhost_cgi.conf
deleted file mode 100644
index 607254c6e..000000000
--- a/vendor/sabre/dav/examples/webserver/apache2_vhost_cgi.conf
+++ /dev/null
@@ -1,21 +0,0 @@
-# This is a sample configuration to setup a dedicated Apache vhost for WebDAV.
-#
-# The main thing that should be configured is the servername, and the path to
-# your SabreDAV installation (DocumentRoot).
-#
-# This configuration assumes CGI or FastCGI is used.
-<VirtualHost *:*>
-
-    # Don't forget to change the server name
-    # ServerName dav.example.org
-
-    # The DocumentRoot is also required
-    # DocumentRoot /home/sabredav/
-
-    # This makes every request go to server.php. This also makes sure
-    # the Authentication information is available. If your server script is
-    # not called server.php, be sure to change it.
-    RewriteEngine On
-    RewriteRule ^/(.*)$ /server.php [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
-
-</VirtualHost *:*>
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/BackendInterface.php b/vendor/sabre/dav/lib/CalDAV/Backend/BackendInterface.php
index 7513fb60d..bd8ee7602 100644
--- a/vendor/sabre/dav/lib/CalDAV/Backend/BackendInterface.php
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/BackendInterface.php
@@ -44,10 +44,12 @@ interface BackendInterface {
      * If the creation was a success, an id must be returned that can be used to
      * reference this calendar in other methods, such as updateCalendar.
      *
+     * The id can be any type, including ints, strings, objects or array.
+     *
      * @param string $principalUri
      * @param string $calendarUri
      * @param array $properties
-     * @return void
+     * @return mixed
      */
     function createCalendar($principalUri, $calendarUri, array $properties);
 
@@ -63,7 +65,7 @@ interface BackendInterface {
      *
      * Read the PropPatch documentation for more info and examples.
      *
-     * @param string $path
+     * @param mixed $calendarId
      * @param \Sabre\DAV\PropPatch $propPatch
      * @return void
      */
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/NotificationSupport.php b/vendor/sabre/dav/lib/CalDAV/Backend/NotificationSupport.php
index 19b9b22a7..9c00a89ef 100644
--- a/vendor/sabre/dav/lib/CalDAV/Backend/NotificationSupport.php
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/NotificationSupport.php
@@ -43,4 +43,19 @@ interface NotificationSupport extends BackendInterface {
      */
     function deleteNotification($principalUri, NotificationInterface $notification);
 
+    /**
+     * This method is called when a user replied to a request to share.
+     *
+     * If the user chose to accept the share, this method should return the
+     * newly created calendar url.
+     *
+     * @param string href The sharee who is replying (often a mailto: address)
+     * @param int status One of the SharingPlugin::STATUS_* constants
+     * @param string $calendarUri The url to the calendar thats being shared
+     * @param string $inReplyTo The unique id this message is a response to
+     * @param string $summary A description of the reply
+     * @return null|string
+     */
+    function shareReply($href, $status, $calendarUri, $inReplyTo, $summary = null);
+
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/PDO.php b/vendor/sabre/dav/lib/CalDAV/Backend/PDO.php
index 76b69dc6e..95f1d49a6 100644
--- a/vendor/sabre/dav/lib/CalDAV/Backend/PDO.php
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/PDO.php
@@ -2,10 +2,11 @@
 
 namespace Sabre\CalDAV\Backend;
 
-use Sabre\VObject;
 use Sabre\CalDAV;
 use Sabre\DAV;
 use Sabre\DAV\Exception\Forbidden;
+use Sabre\VObject;
+use Sabre\DAV\Xml\Element\Sharee;
 
 /**
  * PDO CalDAV backend
@@ -17,7 +18,12 @@ use Sabre\DAV\Exception\Forbidden;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, SchedulingSupport {
+class PDO extends AbstractBackend
+    implements
+        SyncSupport,
+        SubscriptionSupport,
+        SchedulingSupport,
+        SharingSupport {
 
     /**
      * We need to specify a max date, because we need to stop *somewhere*
@@ -44,6 +50,16 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
     public $calendarTableName = 'calendars';
 
     /**
+     * The table name that will be used for calendars instances.
+     *
+     * A single calendar can have multiple instances, if the calendar is
+     * shared.
+     *
+     * @var string
+     */
+    public $calendarInstancesTableName = 'calendarinstances';
+
+    /**
      * The table name that will be used for calendar objects
      *
      * @var string
@@ -140,16 +156,23 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
     function getCalendarsForUser($principalUri) {
 
         $fields = array_values($this->propertyMap);
-        $fields[] = 'id';
+        $fields[] = 'calendarid';
         $fields[] = 'uri';
         $fields[] = 'synctoken';
         $fields[] = 'components';
         $fields[] = 'principaluri';
         $fields[] = 'transparent';
+        $fields[] = 'access';
 
         // Making fields a comma-delimited list
         $fields = implode(', ', $fields);
-        $stmt = $this->pdo->prepare("SELECT " . $fields . " FROM " . $this->calendarTableName . " WHERE principaluri = ? ORDER BY calendarorder ASC");
+        $stmt = $this->pdo->prepare(<<<SQL
+SELECT {$this->calendarInstancesTableName}.id as id, $fields FROM {$this->calendarInstancesTableName}
+    LEFT JOIN {$this->calendarTableName} ON
+        {$this->calendarInstancesTableName}.calendarid = {$this->calendarTableName}.id
+WHERE principaluri = ? ORDER BY calendarorder ASC
+SQL
+        );
         $stmt->execute([$principalUri]);
 
         $calendars = [];
@@ -161,15 +184,27 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
             }
 
             $calendar = [
-                'id'                                                                 => $row['id'],
+                'id'                                                                 => [(int)$row['calendarid'], (int)$row['id']],
                 'uri'                                                                => $row['uri'],
                 'principaluri'                                                       => $row['principaluri'],
                 '{' . CalDAV\Plugin::NS_CALENDARSERVER . '}getctag'                  => 'http://sabre.io/ns/sync/' . ($row['synctoken'] ? $row['synctoken'] : '0'),
                 '{http://sabredav.org/ns}sync-token'                                 => $row['synctoken'] ? $row['synctoken'] : '0',
                 '{' . CalDAV\Plugin::NS_CALDAV . '}supported-calendar-component-set' => new CalDAV\Xml\Property\SupportedCalendarComponentSet($components),
                 '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp'         => new CalDAV\Xml\Property\ScheduleCalendarTransp($row['transparent'] ? 'transparent' : 'opaque'),
+                'share-resource-uri'                                                 => '/ns/share/' . $row['calendarid'],
             ];
 
+            $calendar['share-access'] = (int)$row['access'];
+            // 1 = owner, 2 = readonly, 3 = readwrite
+            if ($row['access'] > 1) {
+                // We need to find more information about the original owner.
+                //$stmt2 = $this->pdo->prepare('SELECT principaluri FROM ' . $this->calendarInstancesTableName . ' WHERE access = 1 AND id = ?');
+                //$stmt2->execute([$row['id']]);
+
+                // read-only is for backwards compatbility. Might go away in
+                // the future.
+                $calendar['read-only'] = (int)$row['access'] === \Sabre\DAV\Sharing\Plugin::ACCESS_READ;
+            }
 
             foreach ($this->propertyMap as $xmlName => $dbName) {
                 $calendar[$xmlName] = $row[$dbName];
@@ -199,31 +234,38 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
         $fieldNames = [
             'principaluri',
             'uri',
-            'synctoken',
             'transparent',
+            'calendarid',
         ];
         $values = [
             ':principaluri' => $principalUri,
             ':uri'          => $calendarUri,
-            ':synctoken'    => 1,
             ':transparent'  => 0,
         ];
 
-        // Default value
+
         $sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
-        $fieldNames[] = 'components';
         if (!isset($properties[$sccs])) {
-            $values[':components'] = 'VEVENT,VTODO';
+            // Default value
+            $components = 'VEVENT,VTODO';
         } else {
             if (!($properties[$sccs] instanceof CalDAV\Xml\Property\SupportedCalendarComponentSet)) {
                 throw new DAV\Exception('The ' . $sccs . ' property must be of type: \Sabre\CalDAV\Xml\Property\SupportedCalendarComponentSet');
             }
-            $values[':components'] = implode(',', $properties[$sccs]->getValue());
+            $components = implode(',', $properties[$sccs]->getValue());
         }
         $transp = '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp';
         if (isset($properties[$transp])) {
-            $values[':transparent'] = $properties[$transp]->getValue() === 'transparent';
+            $values[':transparent'] = $properties[$transp]->getValue() === 'transparent' ? 1 : 0;
         }
+        $stmt = $this->pdo->prepare("INSERT INTO " . $this->calendarTableName . " (synctoken, components) VALUES (1, ?)");
+        $stmt->execute([$components]);
+
+        $calendarId = $this->pdo->lastInsertId(
+            $this->calendarTableName . '_id_seq'
+        );
+
+        $values[':calendarid'] = $calendarId;
 
         foreach ($this->propertyMap as $xmlName => $dbName) {
             if (isset($properties[$xmlName])) {
@@ -233,10 +275,14 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
             }
         }
 
-        $stmt = $this->pdo->prepare("INSERT INTO " . $this->calendarTableName . " (" . implode(', ', $fieldNames) . ") VALUES (" . implode(', ', array_keys($values)) . ")");
+        $stmt = $this->pdo->prepare("INSERT INTO " . $this->calendarInstancesTableName . " (" . implode(', ', $fieldNames) . ") VALUES (" . implode(', ', array_keys($values)) . ")");
+
         $stmt->execute($values);
 
-        return $this->pdo->lastInsertId();
+        return [
+            $calendarId,
+            $this->pdo->lastInsertId($this->calendarInstancesTableName . '_id_seq')
+        ];
 
     }
 
@@ -252,16 +298,21 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
      *
      * Read the PropPatch documenation for more info and examples.
      *
-     * @param string $calendarId
+     * @param mixed $calendarId
      * @param \Sabre\DAV\PropPatch $propPatch
      * @return void
      */
     function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch) {
 
+        if (!is_array($calendarId)) {
+            throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
+        }
+        list($calendarId, $instanceId) = $calendarId;
+
         $supportedProperties = array_keys($this->propertyMap);
         $supportedProperties[] = '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp';
 
-        $propPatch->handle($supportedProperties, function($mutations) use ($calendarId) {
+        $propPatch->handle($supportedProperties, function($mutations) use ($calendarId, $instanceId) {
             $newValues = [];
             foreach ($mutations as $propertyName => $propertyValue) {
 
@@ -282,8 +333,8 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
                 $valuesSql[] = $fieldName . ' = ?';
             }
 
-            $stmt = $this->pdo->prepare("UPDATE " . $this->calendarTableName . " SET " . implode(', ', $valuesSql) . " WHERE id = ?");
-            $newValues['id'] = $calendarId;
+            $stmt = $this->pdo->prepare("UPDATE " . $this->calendarInstancesTableName . " SET " . implode(', ', $valuesSql) . " WHERE id = ?");
+            $newValues['id'] = $instanceId;
             $stmt->execute(array_values($newValues));
 
             $this->addChange($calendarId, "", 2);
@@ -297,19 +348,49 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
     /**
      * Delete a calendar and all it's objects
      *
-     * @param string $calendarId
+     * @param mixed $calendarId
      * @return void
      */
     function deleteCalendar($calendarId) {
 
-        $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ?');
-        $stmt->execute([$calendarId]);
+        if (!is_array($calendarId)) {
+            throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
+        }
+        list($calendarId, $instanceId) = $calendarId;
 
-        $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarTableName . ' WHERE id = ?');
-        $stmt->execute([$calendarId]);
+        $stmt = $this->pdo->prepare('SELECT access FROM ' . $this->calendarInstancesTableName . ' where id = ?');
+        $stmt->execute([$instanceId]);
+        $access = (int)$stmt->fetchColumn();
+
+        if ($access === \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER) {
+
+            /**
+             * If the user is the owner of the calendar, we delete all data and all
+             * instances.
+             **/
+            $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ?');
+            $stmt->execute([$calendarId]);
+
+            $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarChangesTableName . ' WHERE calendarid = ?');
+            $stmt->execute([$calendarId]);
+
+            $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarInstancesTableName . ' WHERE calendarid = ?');
+            $stmt->execute([$calendarId]);
+
+            $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarTableName . ' WHERE id = ?');
+            $stmt->execute([$calendarId]);
+
+        } else {
+
+            /**
+             * If it was an instance of a shared calendar, we only delete that
+             * instance.
+             */
+            $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarInstancesTableName . ' WHERE id = ?');
+            $stmt->execute([$instanceId]);
+
+        }
 
-        $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarChangesTableName . ' WHERE calendarid = ?');
-        $stmt->execute([$calendarId]);
 
     }
 
@@ -341,11 +422,16 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
      * used/fetched to determine these numbers. If both are specified the
      * amount of times this is needed is reduced by a great degree.
      *
-     * @param string $calendarId
+     * @param mixed $calendarId
      * @return array
      */
     function getCalendarObjects($calendarId) {
 
+        if (!is_array($calendarId)) {
+            throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
+        }
+        list($calendarId, $instanceId) = $calendarId;
+
         $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size, componenttype FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ?');
         $stmt->execute([$calendarId]);
 
@@ -354,9 +440,8 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
             $result[] = [
                 'id'           => $row['id'],
                 'uri'          => $row['uri'],
-                'lastmodified' => $row['lastmodified'],
+                'lastmodified' => (int)$row['lastmodified'],
                 'etag'         => '"' . $row['etag'] . '"',
-                'calendarid'   => $row['calendarid'],
                 'size'         => (int)$row['size'],
                 'component'    => strtolower($row['componenttype']),
             ];
@@ -378,12 +463,17 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
      *
      * This method must return null if the object did not exist.
      *
-     * @param string $calendarId
+     * @param mixed $calendarId
      * @param string $objectUri
      * @return array|null
      */
     function getCalendarObject($calendarId, $objectUri) {
 
+        if (!is_array($calendarId)) {
+            throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
+        }
+        list($calendarId, $instanceId) = $calendarId;
+
         $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size, calendardata, componenttype FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ? AND uri = ?');
         $stmt->execute([$calendarId, $objectUri]);
         $row = $stmt->fetch(\PDO::FETCH_ASSOC);
@@ -393,9 +483,8 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
         return [
             'id'            => $row['id'],
             'uri'           => $row['uri'],
-            'lastmodified'  => $row['lastmodified'],
+            'lastmodified'  => (int)$row['lastmodified'],
             'etag'          => '"' . $row['etag'] . '"',
-            'calendarid'    => $row['calendarid'],
             'size'          => (int)$row['size'],
             'calendardata'  => $row['calendardata'],
             'component'     => strtolower($row['componenttype']),
@@ -417,6 +506,11 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
      */
     function getMultipleCalendarObjects($calendarId, array $uris) {
 
+        if (!is_array($calendarId)) {
+            throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
+        }
+        list($calendarId, $instanceId) = $calendarId;
+
         $query = 'SELECT id, uri, lastmodified, etag, calendarid, size, calendardata, componenttype FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ? AND uri IN (';
         // Inserting a whole bunch of question marks
         $query .= implode(',', array_fill(0, count($uris), '?'));
@@ -431,9 +525,8 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
             $result[] = [
                 'id'           => $row['id'],
                 'uri'          => $row['uri'],
-                'lastmodified' => $row['lastmodified'],
+                'lastmodified' => (int)$row['lastmodified'],
                 'etag'         => '"' . $row['etag'] . '"',
-                'calendarid'   => $row['calendarid'],
                 'size'         => (int)$row['size'],
                 'calendardata' => $row['calendardata'],
                 'component'    => strtolower($row['componenttype']),
@@ -465,6 +558,11 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
      */
     function createCalendarObject($calendarId, $objectUri, $calendarData) {
 
+        if (!is_array($calendarId)) {
+            throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
+        }
+        list($calendarId, $instanceId) = $calendarId;
+
         $extraData = $this->getDenormalizedData($calendarData);
 
         $stmt = $this->pdo->prepare('INSERT INTO ' . $this->calendarObjectTableName . ' (calendarid, uri, calendardata, lastmodified, etag, size, componenttype, firstoccurence, lastoccurence, uid) VALUES (?,?,?,?,?,?,?,?,?,?)');
@@ -506,6 +604,11 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
      */
     function updateCalendarObject($calendarId, $objectUri, $calendarData) {
 
+        if (!is_array($calendarId)) {
+            throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
+        }
+        list($calendarId, $instanceId) = $calendarId;
+
         $extraData = $this->getDenormalizedData($calendarData);
 
         $stmt = $this->pdo->prepare('UPDATE ' . $this->calendarObjectTableName . ' SET calendardata = ?, lastmodified = ?, etag = ?, size = ?, componenttype = ?, firstoccurence = ?, lastoccurence = ?, uid = ? WHERE calendarid = ? AND uri = ?');
@@ -583,6 +686,10 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
                 }
 
             }
+            
+            // Ensure Occurence values are positive
+            if ($firstOccurence < 0) $firstOccurence = 0;
+            if ($lastOccurence < 0) $lastOccurence = 0;
         }
 
         // Destroy circular references to PHP will GC the object.
@@ -604,12 +711,17 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
      *
      * The object uri is only the basename, or filename and not a full path.
      *
-     * @param string $calendarId
+     * @param mixed $calendarId
      * @param string $objectUri
      * @return void
      */
     function deleteCalendarObject($calendarId, $objectUri) {
 
+        if (!is_array($calendarId)) {
+            throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
+        }
+        list($calendarId, $instanceId) = $calendarId;
+
         $stmt = $this->pdo->prepare('DELETE FROM ' . $this->calendarObjectTableName . ' WHERE calendarid = ? AND uri = ?');
         $stmt->execute([$calendarId, $objectUri]);
 
@@ -665,12 +777,17 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
      * This specific implementation (for the PDO) backend optimizes filters on
      * specific components, and VEVENT time-ranges.
      *
-     * @param string $calendarId
+     * @param mixed $calendarId
      * @param array $filters
      * @return array
      */
     function calendarQuery($calendarId, array $filters) {
 
+        if (!is_array($calendarId)) {
+            throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
+        }
+        list($calendarId, $instanceId) = $calendarId;
+
         $componentType = null;
         $requirePostFilter = true;
         $timeRange = null;
@@ -766,14 +883,14 @@ class PDO extends AbstractBackend implements SyncSupport, SubscriptionSupport, S
 
         $query = <<<SQL
 SELECT
-    calendars.uri AS calendaruri, calendarobjects.uri as objecturi
+    calendar_instances.uri AS calendaruri, calendarobjects.uri as objecturi
 FROM
     $this->calendarObjectTableName AS calendarobjects
 LEFT JOIN
-    $this->calendarTableName AS calendars
-    ON calendarobjects.calendarid = calendars.id
+    $this->calendarInstancesTableName AS calendar_instances
+    ON calendarobjects.calendarid = calendar_instances.calendarid
 WHERE
-    calendars.principaluri = ?
+    calendar_instances.principaluri = ?
     AND
     calendarobjects.uid = ?
 SQL;
@@ -837,7 +954,7 @@ SQL;
      *
      * The limit is 'suggestive'. You are free to ignore it.
      *
-     * @param string $calendarId
+     * @param mixed $calendarId
      * @param string $syncToken
      * @param int $syncLevel
      * @param int $limit
@@ -845,6 +962,11 @@ SQL;
      */
     function getChangesForCalendar($calendarId, $syncToken, $syncLevel, $limit = null) {
 
+        if (!is_array($calendarId)) {
+            throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
+        }
+        list($calendarId, $instanceId) = $calendarId;
+
         // Current synctoken
         $stmt = $this->pdo->prepare('SELECT synctoken FROM ' . $this->calendarTableName . ' WHERE id = ?');
         $stmt->execute([ $calendarId ]);
@@ -1043,7 +1165,9 @@ SQL;
         $stmt = $this->pdo->prepare("INSERT INTO " . $this->calendarSubscriptionsTableName . " (" . implode(', ', $fieldNames) . ") VALUES (" . implode(', ', array_keys($values)) . ")");
         $stmt->execute($values);
 
-        return $this->pdo->lastInsertId();
+        return $this->pdo->lastInsertId(
+            $this->calendarSubscriptionsTableName . '_id_seq'
+        );
 
     }
 
@@ -1207,4 +1331,179 @@ SQL;
 
     }
 
+    /**
+     * Updates the list of shares.
+     *
+     * @param mixed $calendarId
+     * @param \Sabre\DAV\Xml\Element\Sharee[] $sharees
+     * @return void
+     */
+    function updateInvites($calendarId, array $sharees) {
+
+        if (!is_array($calendarId)) {
+            throw new \InvalidArgumentException('The value passed to $calendarId is expected to be an array with a calendarId and an instanceId');
+        }
+        $currentInvites = $this->getInvites($calendarId);
+        list($calendarId, $instanceId) = $calendarId;
+
+        $removeStmt = $this->pdo->prepare("DELETE FROM " . $this->calendarInstancesTableName . " WHERE calendarid = ? AND share_href = ? AND access IN (2,3)");
+        $updateStmt = $this->pdo->prepare("UPDATE " . $this->calendarInstancesTableName . " SET access = ?, share_displayname = ?, share_invitestatus = ? WHERE calendarid = ? AND share_href = ?");
+
+        $insertStmt = $this->pdo->prepare('
+INSERT INTO ' . $this->calendarInstancesTableName . '
+    (
+        calendarid,
+        principaluri,
+        access,
+        displayname,
+        uri,
+        description,
+        calendarorder,
+        calendarcolor,
+        timezone,
+        transparent,
+        share_href,
+        share_displayname,
+        share_invitestatus
+    )
+    SELECT
+        ?,
+        ?,
+        ?,
+        displayname,
+        ?,
+        description,
+        calendarorder,
+        calendarcolor,
+        timezone,
+        1,
+        ?,
+        ?,
+        ?
+    FROM ' . $this->calendarInstancesTableName . ' WHERE id = ?');
+
+        foreach ($sharees as $sharee) {
+
+            if ($sharee->access === \Sabre\DAV\Sharing\Plugin::ACCESS_NOACCESS) {
+                // if access was set no NOACCESS, it means access for an
+                // existing sharee was removed.
+                $removeStmt->execute([$calendarId, $sharee->href]);
+                continue;
+            }
+
+            if (is_null($sharee->principal)) {
+                // If the server could not determine the principal automatically,
+                // we will mark the invite status as invalid.
+                $sharee->inviteStatus = \Sabre\DAV\Sharing\Plugin::INVITE_INVALID;
+            } else {
+                // Because sabre/dav does not yet have an invitation system,
+                // every invite is automatically accepted for now.
+                $sharee->inviteStatus = \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED;
+            }
+
+            foreach ($currentInvites as $oldSharee) {
+
+                if ($oldSharee->href === $sharee->href) {
+                    // This is an update
+                    $sharee->properties = array_merge(
+                        $oldSharee->properties,
+                        $sharee->properties
+                    );
+                    $updateStmt->execute([
+                        $sharee->access,
+                        isset($sharee->properties['{DAV:}displayname']) ? $sharee->properties['{DAV:}displayname'] : null,
+                        $sharee->inviteStatus ?: $oldSharee->inviteStatus,
+                        $calendarId,
+                        $sharee->href
+                    ]);
+                    continue 2;
+                }
+
+            }
+            // If we got here, it means it was a new sharee
+            $insertStmt->execute([
+                $calendarId,
+                $sharee->principal,
+                $sharee->access,
+                \Sabre\DAV\UUIDUtil::getUUID(),
+                $sharee->href,
+                isset($sharee->properties['{DAV:}displayname']) ? $sharee->properties['{DAV:}displayname'] : null,
+                $sharee->inviteStatus ?: \Sabre\DAV\Sharing\Plugin::INVITE_NORESPONSE,
+                $instanceId
+            ]);
+
+        }
+
+    }
+
+    /**
+     * Returns the list of people whom a calendar is shared with.
+     *
+     * Every item in the returned list must be a Sharee object with at
+     * least the following properties set:
+     *   $href
+     *   $shareAccess
+     *   $inviteStatus
+     *
+     * and optionally:
+     *   $properties
+     *
+     * @param mixed $calendarId
+     * @return \Sabre\DAV\Xml\Element\Sharee[]
+     */
+    function getInvites($calendarId) {
+
+        if (!is_array($calendarId)) {
+            throw new \InvalidArgumentException('The value passed to getInvites() is expected to be an array with a calendarId and an instanceId');
+        }
+        list($calendarId, $instanceId) = $calendarId;
+
+        $query = <<<SQL
+SELECT
+    principaluri,
+    access,
+    share_href,
+    share_displayname,
+    share_invitestatus
+FROM {$this->calendarInstancesTableName}
+WHERE
+    calendarid = ?
+SQL;
+
+        $stmt = $this->pdo->prepare($query);
+        $stmt->execute([$calendarId]);
+
+        $result = [];
+        while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+
+            $result[] = new Sharee([
+                'href'   => isset($row['share_href']) ? $row['share_href'] : \Sabre\HTTP\encodePath($row['principaluri']),
+                'access' => (int)$row['access'],
+                /// Everyone is always immediately accepted, for now.
+                'inviteStatus' => (int)$row['share_invitestatus'],
+                'properties'   =>
+                    !empty($row['share_displayname'])
+                    ?  [ '{DAV:}displayname' => $row['share_displayname'] ]
+                    : [],
+                'principal' => $row['principaluri'],
+            ]);
+
+        }
+        return $result;
+
+    }
+
+    /**
+     * Publishes a calendar
+     *
+     * @param mixed $calendarId
+     * @param bool $value
+     * @return void
+     */
+    function setPublishStatus($calendarId, $value) {
+
+        throw new \Sabre\DAV\Exception\NotImplemented('Not implemented');
+
+    }
+
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/SharingSupport.php b/vendor/sabre/dav/lib/CalDAV/Backend/SharingSupport.php
index 6a11b0ab1..8b6e074e0 100644
--- a/vendor/sabre/dav/lib/CalDAV/Backend/SharingSupport.php
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/SharingSupport.php
@@ -5,231 +5,48 @@ namespace Sabre\CalDAV\Backend;
 /**
  * Adds support for sharing features to a CalDAV server.
  *
- * Note: This feature is experimental, and may change in between different
- * SabreDAV versions.
+ * CalDAV backends that implement this interface, must make the following
+ * modifications to getCalendarsForUser:
  *
- * Early warning: Currently SabreDAV provides no implementation for this. This
- * is, because in it's current state there is no elegant way to do this.
- * The problem lies in the fact that a real CalDAV server with sharing support
- * would first need email support (with invite notifications), and really also
- * a browser-frontend that allows people to accept or reject these shares.
- *
- * In addition, the CalDAV backends are currently kept as independent as
- * possible, and should not be aware of principals, email addresses or
- * accounts.
- *
- * Adding an implementation for Sharing to standard-sabredav would contradict
- * these goals, so for this reason this is currently not implemented, although
- * it may very well in the future; but probably not before SabreDAV 2.0.
- *
- * The interface works however, so if you implement all this, and do it
- * correctly sharing _will_ work. It's not particularly easy, and I _urge you_
- * to make yourself acquainted with the following document first:
- *
- * https://trac.calendarserver.org/browser/CalendarServer/trunk/doc/Extensions/caldav-sharing.txt
- *
- * An overview
- * ===========
- *
- * Implementing this interface will allow a user to share his or her calendars
- * to other users. Effectively, when a calendar is shared the calendar will
- * show up in both the Sharer's and Sharee's calendar-home root.
- * This interface adds a few methods that ensure that this happens, and there
- * are also a number of new requirements in the base-class you must now follow.
- *
- *
- * How it works
- * ============
- *
- * When a user shares a calendar, the updateShares() method will be called with
- * a list of sharees that are now added, and a list of sharees that have been
- * removed.
- * Removal is instant, but when a sharee is added the sharee first gets a
- * chance to accept or reject the invitation for a share.
- *
- * After a share is accepted, the calendar will be returned from
- * getUserCalendars for both the sharer, and the sharee.
- *
- * If the sharee deletes the calendar, only their share gets deleted. When the
- * owner deletes a calendar, it will be removed for everybody.
- *
- *
- * Notifications
- * =============
- *
- * During all these sharing operations, a lot of notifications are sent back
- * and forward.
- *
- * Whenever the list of sharees for a calendar has been changed (they have been
- * added, removed or modified) all sharees should get a notification for this
- * change.
- * This notification is always represented by:
- *
- * Sabre\CalDAV\Notifications\Notification\Invite
- *
- * In the case of an invite, the sharee may reply with an 'accept' or
- * 'decline'. These are always represented by:
- *
- * Sabre\CalDAV\Notifications\Notification\InviteReply
- *
- *
- * Calendar access by sharees
- * ==========================
- *
- * As mentioned earlier, shared calendars must now also be returned for
- * getCalendarsForUser for sharees. A few things change though.
- *
- * The following properties must be specified:
- *
- * 1. {http://calendarserver.org/ns/}shared-url
- *
- * This property MUST contain the url to the original calendar, that is.. the
- * path to the calendar from the owner.
- *
- * 2. {http://sabredav.org/ns}owner-principal
- *
- * This is a url to to the principal who is sharing the calendar.
- *
- * 3. {http://sabredav.org/ns}read-only
- *
- * This should be either 0 or 1, depending on if the user has read-only or
- * read-write access to the calendar.
- *
- * Only when this is done, the calendar will correctly be marked as a calendar
- * that's shared to him, thus allowing clients to display the correct interface
- * and ACL enforcement.
- *
- * If a sharee deletes their calendar, only their instance of the calendar
- * should be deleted, the original should still exists.
- * Pretty much any 'dead' WebDAV properties on these shared calendars should be
- * specific to a user. This means that if the displayname is changed by a
- * sharee, the original is not affected. This is also true for:
- *   * The description
- *   * The color
- *   * The order
- *   * And any other dead properties.
- *
- * Properties like a ctag should not be different for multiple instances of the
- * calendar.
- *
- * Lastly, objects *within* calendars should also have user-specific data. The
- * two things that are user-specific are:
- *   * VALARM objects
- *   * The TRANSP property
- *
- * This _also_ implies that if a VALARM is deleted by a sharee for some event,
- * this has no effect on the original VALARM.
- *
- * Understandably, the this last requirement is one of the hardest.
- * Realisticly, I can see people ignoring this part of the spec, but that could
- * cause a different set of issues.
- *
- *
- * Publishing
- * ==========
- *
- * When a user publishes a url, the server should generate a 'publish url'.
- * This is a read-only url, anybody can use to consume the calendar feed.
- *
- * Calendars are in one of two states:
- *   * published
- *   * unpublished
- *
- * If a calendar is published, the following property should be returned
- * for each calendar in getCalendarsForUser.
- *
- * {http://calendarserver.org/ns/}publish-url
- *
- * This element should contain a {DAV:}href element, which points to the
- * public url that does not require authentication. Unlike every other href,
- * this url must be absolute.
- *
- * Ideally, the following property is always returned
- *
- * {http://calendarserver.org/ns/}pre-publish-url
- *
- * This property should contain the url that the calendar _would_ have, if it
- * were to be published. iCal uses this to display the url, before the user
- * will actually publish it.
- *
- *
- * Selectively disabling publish or share feature
- * ==============================================
- *
- * If Sabre\CalDAV\Property\AllowedSharingModes is returned from
- * getCalendarsForUser, this allows the server to specify whether either sharing,
- * or publishing is supported.
- *
- * This allows a client to determine in advance which features are available,
- * and update the interface appropriately. If this property is not returned by
- * the backend, the SharingPlugin automatically injects it and assumes both
- * features are available.
+ * 1. Return shared calendars for users.
+ * 2. For every calendar, return calendar-resource-uri. This strings is a URI or
+ *    relative URI reference that must be unique for every calendar, but
+ *    identical for every instance of the same shared calenar.
+ * 3. For every calenar, you must return a share-access element. This element
+ *    should contain one of the Sabre\DAV\Sharing\Plugin:ACCESS_* contants and
+ *    indicates the access level the user has.
  *
  * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface SharingSupport extends NotificationSupport {
+interface SharingSupport extends BackendInterface {
 
     /**
      * Updates the list of shares.
      *
-     * The first array is a list of people that are to be added to the
-     * calendar.
-     *
-     * Every element in the add array has the following properties:
-     *   * href - A url. Usually a mailto: address
-     *   * commonName - Usually a first and last name, or false
-     *   * summary - A description of the share, can also be false
-     *   * readOnly - A boolean value
-     *
-     * Every element in the remove array is just the address string.
-     *
-     * Note that if the calendar is currently marked as 'not shared' by and
-     * this method is called, the calendar should be 'upgraded' to a shared
-     * calendar.
-     *
      * @param mixed $calendarId
-     * @param array $add
-     * @param array $remove
+     * @param \Sabre\DAV\Xml\Element\Sharee[] $sharees
      * @return void
      */
-    function updateShares($calendarId, array $add, array $remove);
+    function updateInvites($calendarId, array $sharees);
 
     /**
      * Returns the list of people whom this calendar is shared with.
      *
-     * Every element in this array should have the following properties:
-     *   * href - Often a mailto: address
-     *   * commonName - Optional, for example a first + last name
-     *   * status - See the Sabre\CalDAV\SharingPlugin::STATUS_ constants.
-     *   * readOnly - boolean
-     *   * summary - Optional, a description for the share
+     * Every item in the returned list must be a Sharee object with at
+     * least the following properties set:
+     *   $href
+     *   $shareAccess
+     *   $inviteStatus
      *
-     * This method may be called by either the original instance of the
-     * calendar, as well as the shared instances. In the case of the shared
-     * instances, it is perfectly acceptable to return an empty array in case
-     * there are privacy concerns.
+     * and optionally:
+     *   $properties
      *
      * @param mixed $calendarId
-     * @return array
-     */
-    function getShares($calendarId);
-
-    /**
-     * This method is called when a user replied to a request to share.
-     *
-     * If the user chose to accept the share, this method should return the
-     * newly created calendar url.
-     *
-     * @param string href The sharee who is replying (often a mailto: address)
-     * @param int status One of the SharingPlugin::STATUS_* constants
-     * @param string $calendarUri The url to the calendar thats being shared
-     * @param string $inReplyTo The unique id this message is a response to
-     * @param string $summary A description of the reply
-     * @return null|string
+     * @return \Sabre\DAV\Xml\Element\Sharee[]
      */
-    function shareReply($href, $status, $calendarUri, $inReplyTo, $summary = null);
+    function getInvites($calendarId);
 
     /**
      * Publishes a calendar
diff --git a/vendor/sabre/dav/lib/CalDAV/Backend/SimplePDO.php b/vendor/sabre/dav/lib/CalDAV/Backend/SimplePDO.php
new file mode 100644
index 000000000..f8238ea9a
--- /dev/null
+++ b/vendor/sabre/dav/lib/CalDAV/Backend/SimplePDO.php
@@ -0,0 +1,296 @@
+<?php
+
+namespace Sabre\CalDAV\Backend;
+
+use Sabre\CalDAV;
+use Sabre\DAV;
+
+/**
+ * Simple PDO CalDAV backend.
+ *
+ * This class is basically the most minmum example to get a caldav backend up
+ * and running. This class uses the following schema (MySQL example):
+ *
+ * CREATE TABLE simple_calendars (
+ *    id INT UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+ *    uri VARBINARY(200) NOT NULL,
+ *    principaluri VARBINARY(200) NOT NULL
+ * );
+ *
+ * CREATE TABLE simple_calendarobjects (
+ *    id INT UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
+ *    calendarid INT UNSIGNED NOT NULL,
+ *    uri VARBINARY(200) NOT NULL,
+ *    calendardata MEDIUMBLOB
+ * )
+ *
+ * To make this class work, you absolutely need to have the PropertyStorage
+ * plugin enabled.
+ *
+ * @copyright Copyright (C) 2007-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class SimplePDO extends AbstractBackend {
+
+    /**
+     * pdo
+     *
+     * @var \PDO
+     */
+    protected $pdo;
+
+    /**
+     * Creates the backend
+     *
+     * @param \PDO $pdo
+     */
+    function __construct(\PDO $pdo) {
+
+        $this->pdo = $pdo;
+
+    }
+
+    /**
+     * Returns a list of calendars for a principal.
+     *
+     * Every project is an array with the following keys:
+     *  * id, a unique id that will be used by other functions to modify the
+     *    calendar. This can be the same as the uri or a database key.
+     *  * uri. This is just the 'base uri' or 'filename' of the calendar.
+     *  * principaluri. The owner of the calendar. Almost always the same as
+     *    principalUri passed to this method.
+     *
+     * Furthermore it can contain webdav properties in clark notation. A very
+     * common one is '{DAV:}displayname'.
+     *
+     * Many clients also require:
+     * {urn:ietf:params:xml:ns:caldav}supported-calendar-component-set
+     * For this property, you can just return an instance of
+     * Sabre\CalDAV\Xml\Property\SupportedCalendarComponentSet.
+     *
+     * If you return {http://sabredav.org/ns}read-only and set the value to 1,
+     * ACL will automatically be put in read-only mode.
+     *
+     * @param string $principalUri
+     * @return array
+     */
+    function getCalendarsForUser($principalUri) {
+
+        // Making fields a comma-delimited list
+        $stmt = $this->pdo->prepare("SELECT id, uri FROM simple_calendars WHERE principaluri = ? ORDER BY id ASC");
+        $stmt->execute([$principalUri]);
+
+        $calendars = [];
+        while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+
+            $calendars[] = [
+                'id'           => $row['id'],
+                'uri'          => $row['uri'],
+                'principaluri' => $principalUri,
+            ];
+
+        }
+
+        return $calendars;
+
+    }
+
+    /**
+     * Creates a new calendar for a principal.
+     *
+     * If the creation was a success, an id must be returned that can be used
+     * to reference this calendar in other methods, such as updateCalendar.
+     *
+     * @param string $principalUri
+     * @param string $calendarUri
+     * @param array $properties
+     * @return string
+     */
+    function createCalendar($principalUri, $calendarUri, array $properties) {
+
+        $stmt = $this->pdo->prepare("INSERT INTO simple_calendars (principaluri, uri) VALUES (?, ?)");
+        $stmt->execute([$principalUri, $calendarUri]);
+
+        return $this->pdo->lastInsertId();
+
+    }
+
+    /**
+     * Delete a calendar and all it's objects
+     *
+     * @param string $calendarId
+     * @return void
+     */
+    function deleteCalendar($calendarId) {
+
+        $stmt = $this->pdo->prepare('DELETE FROM simple_calendarobjects WHERE calendarid = ?');
+        $stmt->execute([$calendarId]);
+
+        $stmt = $this->pdo->prepare('DELETE FROM simple_calendars WHERE id = ?');
+        $stmt->execute([$calendarId]);
+
+    }
+
+    /**
+     * Returns all calendar objects within a calendar.
+     *
+     * Every item contains an array with the following keys:
+     *   * calendardata - The iCalendar-compatible calendar data
+     *   * uri - a unique key which will be used to construct the uri. This can
+     *     be any arbitrary string, but making sure it ends with '.ics' is a
+     *     good idea. This is only the basename, or filename, not the full
+     *     path.
+     *   * lastmodified - a timestamp of the last modification time
+     *   * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
+     *   '  "abcdef"')
+     *   * size - The size of the calendar objects, in bytes.
+     *   * component - optional, a string containing the type of object, such
+     *     as 'vevent' or 'vtodo'. If specified, this will be used to populate
+     *     the Content-Type header.
+     *
+     * Note that the etag is optional, but it's highly encouraged to return for
+     * speed reasons.
+     *
+     * The calendardata is also optional. If it's not returned
+     * 'getCalendarObject' will be called later, which *is* expected to return
+     * calendardata.
+     *
+     * If neither etag or size are specified, the calendardata will be
+     * used/fetched to determine these numbers. If both are specified the
+     * amount of times this is needed is reduced by a great degree.
+     *
+     * @param string $calendarId
+     * @return array
+     */
+    function getCalendarObjects($calendarId) {
+
+        $stmt = $this->pdo->prepare('SELECT id, uri, calendardata FROM simple_calendarobjects WHERE calendarid = ?');
+        $stmt->execute([$calendarId]);
+
+        $result = [];
+        foreach ($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
+            $result[] = [
+                'id'           => $row['id'],
+                'uri'          => $row['uri'],
+                'etag'         => '"' . md5($row['calendardata']) . '"',
+                'calendarid'   => $calendarId,
+                'size'         => strlen($row['calendardata']),
+                'calendardata' => $row['calendardata'],
+            ];
+        }
+
+        return $result;
+
+    }
+
+    /**
+     * Returns information from a single calendar object, based on it's object
+     * uri.
+     *
+     * The object uri is only the basename, or filename and not a full path.
+     *
+     * The returned array must have the same keys as getCalendarObjects. The
+     * 'calendardata' object is required here though, while it's not required
+     * for getCalendarObjects.
+     *
+     * This method must return null if the object did not exist.
+     *
+     * @param string $calendarId
+     * @param string $objectUri
+     * @return array|null
+     */
+    function getCalendarObject($calendarId, $objectUri) {
+
+        $stmt = $this->pdo->prepare('SELECT id, uri, calendardata FROM simple_calendarobjects WHERE calendarid = ? AND uri = ?');
+        $stmt->execute([$calendarId, $objectUri]);
+        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
+
+        if (!$row) return null;
+
+        return [
+            'id'            => $row['id'],
+            'uri'           => $row['uri'],
+            'etag'          => '"' . md5($row['calendardata']) . '"',
+            'calendarid'    => $calendarId,
+            'size'          => strlen($row['calendardata']),
+            'calendardata'  => $row['calendardata'],
+         ];
+
+    }
+
+    /**
+     * Creates a new calendar object.
+     *
+     * The object uri is only the basename, or filename and not a full path.
+     *
+     * It is possible return an etag from this function, which will be used in
+     * the response to this PUT request. Note that the ETag must be surrounded
+     * by double-quotes.
+     *
+     * However, you should only really return this ETag if you don't mangle the
+     * calendar-data. If the result of a subsequent GET to this object is not
+     * the exact same as this request body, you should omit the ETag.
+     *
+     * @param mixed $calendarId
+     * @param string $objectUri
+     * @param string $calendarData
+     * @return string|null
+     */
+    function createCalendarObject($calendarId, $objectUri, $calendarData) {
+
+        $stmt = $this->pdo->prepare('INSERT INTO simple_calendarobjects (calendarid, uri, calendardata) VALUES (?,?,?)');
+        $stmt->execute([
+            $calendarId,
+            $objectUri,
+            $calendarData
+        ]);
+
+        return '"' . md5($calendarData) . '"';
+
+    }
+
+    /**
+     * Updates an existing calendarobject, based on it's uri.
+     *
+     * The object uri is only the basename, or filename and not a full path.
+     *
+     * It is possible return an etag from this function, which will be used in
+     * the response to this PUT request. Note that the ETag must be surrounded
+     * by double-quotes.
+     *
+     * However, you should only really return this ETag if you don't mangle the
+     * calendar-data. If the result of a subsequent GET to this object is not
+     * the exact same as this request body, you should omit the ETag.
+     *
+     * @param mixed $calendarId
+     * @param string $objectUri
+     * @param string $calendarData
+     * @return string|null
+     */
+    function updateCalendarObject($calendarId, $objectUri, $calendarData) {
+
+        $stmt = $this->pdo->prepare('UPDATE simple_calendarobjects SET calendardata = ? WHERE calendarid = ? AND uri = ?');
+        $stmt->execute([$calendarData, $calendarId, $objectUri]);
+
+        return '"' . md5($calendarData) . '"';
+
+    }
+
+    /**
+     * Deletes an existing calendar object.
+     *
+     * The object uri is only the basename, or filename and not a full path.
+     *
+     * @param string $calendarId
+     * @param string $objectUri
+     * @return void
+     */
+    function deleteCalendarObject($calendarId, $objectUri) {
+
+        $stmt = $this->pdo->prepare('DELETE FROM simple_calendarobjects WHERE calendarid = ? AND uri = ?');
+        $stmt->execute([$calendarId, $objectUri]);
+
+    }
+
+}
diff --git a/vendor/sabre/dav/lib/CalDAV/Calendar.php b/vendor/sabre/dav/lib/CalDAV/Calendar.php
index ff8e19b15..90ace0d21 100644
--- a/vendor/sabre/dav/lib/CalDAV/Calendar.php
+++ b/vendor/sabre/dav/lib/CalDAV/Calendar.php
@@ -18,6 +18,8 @@ use Sabre\DAV\PropPatch;
  */
 class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection, DAV\IMultiGet {
 
+    use DAVACL\ACLTrait;
+
     /**
      * This is an array with calendar information
      *
@@ -86,7 +88,7 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
 
         foreach ($this->calendarInfo as $propName => $propValue) {
 
-            if ($propName[0] === '{')
+            if (!is_null($propValue) && $propName[0] === '{')
                 $response[$propName] = $this->calendarInfo[$propName];
 
         }
@@ -227,7 +229,7 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
     /**
      * Returns the last modification date as a unix timestamp.
      *
-     * @return void
+     * @return null
      */
     function getLastModified() {
 
@@ -249,19 +251,6 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
     }
 
     /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
-
-    /**
      * Returns a list of ACE's for this node.
      *
      * Each ACE has the following properties:
@@ -360,50 +349,6 @@ class Calendar implements ICalendar, DAV\IProperties, DAV\Sync\ISyncCollection,
 
     }
 
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new DAV\Exception\MethodNotAllowed('Changing ACL is not yet supported');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See \Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        $default = DAVACL\Plugin::getDefaultSupportedPrivilegeSet();
-
-        // We need to inject 'read-free-busy' in the tree, aggregated under
-        // {DAV:}read.
-        foreach ($default['aggregates'] as &$agg) {
-
-            if ($agg['privilege'] !== '{DAV:}read') continue;
-
-            $agg['aggregates'][] = [
-                'privilege' => '{' . Plugin::NS_CALDAV . '}read-free-busy',
-            ];
-
-        }
-        return $default;
-
-    }
 
     /**
      * Performs a calendar-query on the contents of this calendar.
diff --git a/vendor/sabre/dav/lib/CalDAV/CalendarHome.php b/vendor/sabre/dav/lib/CalDAV/CalendarHome.php
index a53f829e2..0a4bfb68f 100644
--- a/vendor/sabre/dav/lib/CalDAV/CalendarHome.php
+++ b/vendor/sabre/dav/lib/CalDAV/CalendarHome.php
@@ -22,6 +22,8 @@ use Sabre\HTTP\URLUtil;
  */
 class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
 
+    use DAVACL\ACLTrait;
+
     /**
      * CalDAV backend
      *
@@ -147,11 +149,7 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
         foreach ($this->caldavBackend->getCalendarsForUser($this->principalInfo['uri']) as $calendar) {
             if ($calendar['uri'] === $name) {
                 if ($this->caldavBackend instanceof Backend\SharingSupport) {
-                    if (isset($calendar['{http://calendarserver.org/ns/}shared-url'])) {
-                        return new SharedCalendar($this->caldavBackend, $calendar);
-                    } else {
-                        return new ShareableCalendar($this->caldavBackend, $calendar);
-                    }
+                    return new SharedCalendar($this->caldavBackend, $calendar);
                 } else {
                     return new Calendar($this->caldavBackend, $calendar);
                 }
@@ -198,11 +196,7 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
         $objs = [];
         foreach ($calendars as $calendar) {
             if ($this->caldavBackend instanceof Backend\SharingSupport) {
-                if (isset($calendar['{http://calendarserver.org/ns/}shared-url'])) {
-                    $objs[] = new SharedCalendar($this->caldavBackend, $calendar);
-                } else {
-                    $objs[] = new ShareableCalendar($this->caldavBackend, $calendar);
-                }
+                $objs[] = new SharedCalendar($this->caldavBackend, $calendar);
             } else {
                 $objs[] = new Calendar($this->caldavBackend, $calendar);
             }
@@ -278,11 +272,9 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
     }
 
     /**
-     * Returns the owner principal
+     * Returns the owner of the calendar home.
      *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
+     * @return string
      */
     function getOwner() {
 
@@ -291,19 +283,6 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
     }
 
     /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
-
-    /**
      * Returns a list of ACE's for this node.
      *
      * Each ACE has the following properties:
@@ -348,37 +327,6 @@ class CalendarHome implements DAV\IExtendedCollection, DAVACL\IACL {
 
     }
 
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new DAV\Exception\MethodNotAllowed('Changing ACL is not yet supported');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
 
     /**
      * This method is called when a user replied to a request to share.
diff --git a/vendor/sabre/dav/lib/CalDAV/CalendarObject.php b/vendor/sabre/dav/lib/CalDAV/CalendarObject.php
index 393ca4cbd..001b35112 100644
--- a/vendor/sabre/dav/lib/CalDAV/CalendarObject.php
+++ b/vendor/sabre/dav/lib/CalDAV/CalendarObject.php
@@ -11,6 +11,8 @@ namespace Sabre\CalDAV;
  */
 class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\DAVACL\IACL {
 
+    use \Sabre\DAVACL\ACLTrait;
+
     /**
      * Sabre\CalDAV\Backend\BackendInterface
      *
@@ -192,19 +194,6 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
     }
 
     /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
-
-    /**
      * Returns a list of ACE's for this node.
      *
      * Each ACE has the following properties:
@@ -226,22 +215,12 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
         // The default ACL
         return [
             [
-                'privilege' => '{DAV:}read',
-                'principal' => $this->calendarInfo['principaluri'],
-                'protected' => true,
-            ],
-            [
-                'privilege' => '{DAV:}write',
+                'privilege' => '{DAV:}all',
                 'principal' => $this->calendarInfo['principaluri'],
                 'protected' => true,
             ],
             [
-                'privilege' => '{DAV:}read',
-                'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
-                'protected' => true,
-            ],
-            [
-                'privilege' => '{DAV:}write',
+                'privilege' => '{DAV:}all',
                 'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
                 'protected' => true,
             ],
@@ -255,36 +234,4 @@ class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\
 
     }
 
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new \Sabre\DAV\Exception\MethodNotAllowed('Changing ACL is not yet supported');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See \Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/ICSExportPlugin.php b/vendor/sabre/dav/lib/CalDAV/ICSExportPlugin.php
index 8c296d50f..a3a824c71 100644
--- a/vendor/sabre/dav/lib/CalDAV/ICSExportPlugin.php
+++ b/vendor/sabre/dav/lib/CalDAV/ICSExportPlugin.php
@@ -170,13 +170,13 @@ class ICSExportPlugin extends DAV\ServerPlugin {
     protected function generateResponse($path, $start, $end, $expand, $componentType, $format, $properties, ResponseInterface $response) {
 
         $calDataProp = '{' . Plugin::NS_CALDAV . '}calendar-data';
+        $calendarNode = $this->server->tree->getNodeForPath($path);
 
         $blobs = [];
         if ($start || $end || $componentType) {
 
             // If there was a start or end filter, we need to enlist
             // calendarQuery for speed.
-            $calendarNode = $this->server->tree->getNodeForPath($path);
             $queryResult = $calendarNode->calendarQuery([
                 'name'         => 'VCALENDAR',
                 'comp-filters' => [
@@ -246,17 +246,29 @@ class ICSExportPlugin extends DAV\ServerPlugin {
             $mergedCalendar = $mergedCalendar->expand($start, $end, $calendarTimeZone);
         }
 
-        $response->setHeader('Content-Type', $format);
+        $filenameExtension = '.ics';
 
         switch ($format) {
             case 'text/calendar' :
                 $mergedCalendar = $mergedCalendar->serialize();
+                $filenameExtension = '.ics';
                 break;
             case 'application/calendar+json' :
                 $mergedCalendar = json_encode($mergedCalendar->jsonSerialize());
+                $filenameExtension = '.json';
                 break;
         }
 
+        $filename = preg_replace(
+            '/[^a-zA-Z0-9-_ ]/um',
+            '',
+            $calendarNode->getName()
+        );
+        $filename .= '-' . date('Y-m-d') . $filenameExtension;
+
+        $response->setHeader('Content-Disposition', 'attachment; filename="' . $filename . '"');
+        $response->setHeader('Content-Type', $format);
+
         $response->setStatus(200);
         $response->setBody($mergedCalendar);
 
@@ -272,11 +284,11 @@ class ICSExportPlugin extends DAV\ServerPlugin {
     function mergeObjects(array $properties, array $inputObjects) {
 
         $calendar = new VObject\Component\VCalendar();
-        $calendar->version = '2.0';
+        $calendar->VERSION = '2.0';
         if (DAV\Server::$exposeVersion) {
-            $calendar->prodid = '-//SabreDAV//SabreDAV ' . DAV\Version::VERSION . '//EN';
+            $calendar->PRODID = '-//SabreDAV//SabreDAV ' . DAV\Version::VERSION . '//EN';
         } else {
-            $calendar->prodid = '-//SabreDAV//SabreDAV//EN';
+            $calendar->PRODID = '-//SabreDAV//SabreDAV//EN';
         }
         if (isset($properties['{DAV:}displayname'])) {
             $calendar->{'X-WR-CALNAME'} = $properties['{DAV:}displayname'];
diff --git a/vendor/sabre/dav/lib/CalDAV/IShareableCalendar.php b/vendor/sabre/dav/lib/CalDAV/IShareableCalendar.php
deleted file mode 100644
index cfda91a55..000000000
--- a/vendor/sabre/dav/lib/CalDAV/IShareableCalendar.php
+++ /dev/null
@@ -1,48 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-/**
- * This interface represents a Calendar that can be shared with other users.
- *
- * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-interface IShareableCalendar extends ICalendar {
-
-    /**
-     * Updates the list of shares.
-     *
-     * The first array is a list of people that are to be added to the
-     * calendar.
-     *
-     * Every element in the add array has the following properties:
-     *   * href - A url. Usually a mailto: address
-     *   * commonName - Usually a first and last name, or false
-     *   * summary - A description of the share, can also be false
-     *   * readOnly - A boolean value
-     *
-     * Every element in the remove array is just the address string.
-     *
-     * @param array $add
-     * @param array $remove
-     * @return void
-     */
-    function updateShares(array $add, array $remove);
-
-    /**
-     * Returns the list of people whom this calendar is shared with.
-     *
-     * Every element in this array should have the following properties:
-     *   * href - Often a mailto: address
-     *   * commonName - Optional, for example a first + last name
-     *   * status - See the Sabre\CalDAV\SharingPlugin::STATUS_ constants.
-     *   * readOnly - boolean
-     *   * summary - Optional, a description for the share
-     *
-     * @return array
-     */
-    function getShares();
-
-}
diff --git a/vendor/sabre/dav/lib/CalDAV/ISharedCalendar.php b/vendor/sabre/dav/lib/CalDAV/ISharedCalendar.php
index 84442ac21..15f3b5335 100644
--- a/vendor/sabre/dav/lib/CalDAV/ISharedCalendar.php
+++ b/vendor/sabre/dav/lib/CalDAV/ISharedCalendar.php
@@ -2,6 +2,8 @@
 
 namespace Sabre\CalDAV;
 
+use Sabre\DAV\Sharing\ISharedNode;
+
 /**
  * This interface represents a Calendar that is shared by a different user.
  *
@@ -9,28 +11,16 @@ namespace Sabre\CalDAV;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-interface ISharedCalendar extends ICalendar {
-
-    /**
-     * This method should return the url of the owners' copy of the shared
-     * calendar.
-     *
-     * @return string
-     */
-    function getSharedUrl();
+interface ISharedCalendar extends ISharedNode {
 
     /**
-     * Returns the list of people whom this calendar is shared with.
+     * Marks this calendar as published.
      *
-     * Every element in this array should have the following properties:
-     *   * href - Often a mailto: address
-     *   * commonName - Optional, for example a first + last name
-     *   * status - See the Sabre\CalDAV\SharingPlugin::STATUS_ constants.
-     *   * readOnly - boolean
-     *   * summary - Optional, a description for the share
+     * Publishing a calendar should automatically create a read-only, public,
+     * subscribable calendar.
      *
-     * @return array
+     * @param bool $value
+     * @return void
      */
-    function getShares();
-
+    function setPublishStatus($value);
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Notifications/Collection.php b/vendor/sabre/dav/lib/CalDAV/Notifications/Collection.php
index 1fcc1171c..5fda61dfa 100644
--- a/vendor/sabre/dav/lib/CalDAV/Notifications/Collection.php
+++ b/vendor/sabre/dav/lib/CalDAV/Notifications/Collection.php
@@ -22,6 +22,8 @@ use Sabre\DAVACL;
  */
 class Collection extends DAV\Collection implements ICollection, DAVACL\IACL {
 
+    use DAVACL\ACLTrait;
+
     /**
      * The notification backend
      *
@@ -96,78 +98,4 @@ class Collection extends DAV\Collection implements ICollection, DAVACL\IACL {
 
     }
 
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
-
-    /**
-     * Returns a list of ACE's for this node.
-     *
-     * Each ACE has the following properties:
-     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
-     *     currently the only supported privileges
-     *   * 'principal', a url to the principal who owns the node
-     *   * 'protected' (optional), indicating that this ACE is not allowed to
-     *      be updated.
-     *
-     * @return array
-     */
-    function getACL() {
-
-        return [
-            [
-                'principal' => $this->getOwner(),
-                'privilege' => '{DAV:}read',
-                'protected' => true,
-            ],
-            [
-                'principal' => $this->getOwner(),
-                'privilege' => '{DAV:}write',
-                'protected' => true,
-            ]
-        ];
-
-    }
-
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's as an array argument.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new DAV\Exception\NotImplemented('Updating ACLs is not implemented here');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Notifications/Node.php b/vendor/sabre/dav/lib/CalDAV/Notifications/Node.php
index 47e78d5de..11df0c94b 100644
--- a/vendor/sabre/dav/lib/CalDAV/Notifications/Node.php
+++ b/vendor/sabre/dav/lib/CalDAV/Notifications/Node.php
@@ -20,6 +20,8 @@ use Sabre\DAVACL;
  */
 class Node extends DAV\File implements INode, DAVACL\IACL {
 
+    use DAVACL\ACLTrait;
+
     /**
      * The notification backend
      *
@@ -116,78 +118,4 @@ class Node extends DAV\File implements INode, DAVACL\IACL {
 
     }
 
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
-
-    /**
-     * Returns a list of ACE's for this node.
-     *
-     * Each ACE has the following properties:
-     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
-     *     currently the only supported privileges
-     *   * 'principal', a url to the principal who owns the node
-     *   * 'protected' (optional), indicating that this ACE is not allowed to
-     *      be updated.
-     *
-     * @return array
-     */
-    function getACL() {
-
-        return [
-            [
-                'principal' => $this->getOwner(),
-                'privilege' => '{DAV:}read',
-                'protected' => true,
-            ],
-            [
-                'principal' => $this->getOwner(),
-                'privilege' => '{DAV:}write',
-                'protected' => true,
-            ]
-        ];
-
-    }
-
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's as an array argument.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new DAV\Exception\NotImplemented('Updating ACLs is not implemented here');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Plugin.php b/vendor/sabre/dav/lib/CalDAV/Plugin.php
index 663490023..71ba75206 100644
--- a/vendor/sabre/dav/lib/CalDAV/Plugin.php
+++ b/vendor/sabre/dav/lib/CalDAV/Plugin.php
@@ -5,8 +5,9 @@ namespace Sabre\CalDAV;
 use DateTimeZone;
 use Sabre\DAV;
 use Sabre\DAV\Exception\BadRequest;
+use Sabre\DAV\INode;
 use Sabre\DAV\MkCol;
-use Sabre\DAV\Xml\Property\Href;
+use Sabre\DAV\Xml\Property\LocalHref;
 use Sabre\DAVACL;
 use Sabre\VObject;
 use Sabre\HTTP;
@@ -186,6 +187,7 @@ class Plugin extends DAV\ServerPlugin {
         $server->on('beforeCreateFile',    [$this, 'beforeCreateFile']);
         $server->on('beforeWriteContent',  [$this, 'beforeWriteContent']);
         $server->on('afterMethod:GET',     [$this, 'httpAfterGET']);
+        $server->on('getSupportedPrivilegeSet', [$this, 'getSupportedPrivilegeSet']);
 
         $server->xml->namespaceMap[self::NS_CALDAV] = 'cal';
         $server->xml->namespaceMap[self::NS_CALENDARSERVER] = 'cs';
@@ -233,9 +235,10 @@ class Plugin extends DAV\ServerPlugin {
      *
      * @param string $reportName
      * @param mixed $report
+     * @param mixed $path
      * @return bool
      */
-    function report($reportName, $report) {
+    function report($reportName, $report, $path) {
 
         switch ($reportName) {
             case '{' . self::NS_CALDAV . '}calendar-multiget' :
@@ -341,7 +344,7 @@ class Plugin extends DAV\ServerPlugin {
 
                 $calendarHomePath = $this->getCalendarHomeForPrincipal($principalUrl);
                 if (is_null($calendarHomePath)) return null;
-                return new Href($calendarHomePath . '/');
+                return new LocalHref($calendarHomePath . '/');
 
             });
             // The calendar-user-address-set property is basically mapped to
@@ -349,7 +352,7 @@ class Plugin extends DAV\ServerPlugin {
             $propFind->handle('{' . self::NS_CALDAV . '}calendar-user-address-set', function() use ($node) {
                 $addresses = $node->getAlternateUriSet();
                 $addresses[] = $this->server->getBaseUri() . $node->getPrincipalUrl() . '/';
-                return new Href($addresses, false);
+                return new LocalHref($addresses);
             });
             // For some reason somebody thought it was a good idea to add
             // another one of these properties. We're supporting it too.
@@ -394,8 +397,8 @@ class Plugin extends DAV\ServerPlugin {
 
                 }
 
-                $propFind->set($propRead, new Href($readList));
-                $propFind->set($propWrite, new Href($writeList));
+                $propFind->set($propRead, new LocalHref($readList));
+                $propFind->set($propWrite, new LocalHref($writeList));
 
             }
 
@@ -821,11 +824,7 @@ class Plugin extends DAV\ServerPlugin {
             $data = stream_get_contents($data);
         }
 
-        $before = md5($data);
-        // Converting the data to unicode, if needed.
-        $data = DAV\StringUtil::ensureUTF8($data);
-
-        if ($before !== md5($data)) $modified = true;
+        $before = $data;
 
         try {
 
@@ -865,7 +864,7 @@ class Plugin extends DAV\ServerPlugin {
         }
 
         $foundType = null;
-        $foundUID = null;
+
         foreach ($vobj->getComponents() as $component) {
             switch ($component->name) {
                 case 'VTIMEZONE' :
@@ -873,31 +872,59 @@ class Plugin extends DAV\ServerPlugin {
                 case 'VEVENT' :
                 case 'VTODO' :
                 case 'VJOURNAL' :
-                    if (is_null($foundType)) {
-                        $foundType = $component->name;
-                        if (!in_array($foundType, $supportedComponents)) {
-                            throw new Exception\InvalidComponentType('This calendar only supports ' . implode(', ', $supportedComponents) . '. We found a ' . $foundType);
-                        }
-                        if (!isset($component->UID)) {
-                            throw new DAV\Exception\BadRequest('Every ' . $component->name . ' component must have an UID');
-                        }
-                        $foundUID = (string)$component->UID;
-                    } else {
-                        if ($foundType !== $component->name) {
-                            throw new DAV\Exception\BadRequest('A calendar object must only contain 1 component. We found a ' . $component->name . ' as well as a ' . $foundType);
-                        }
-                        if ($foundUID !== (string)$component->UID) {
-                            throw new DAV\Exception\BadRequest('Every ' . $component->name . ' in this object must have identical UIDs');
-                        }
-                    }
+                    $foundType = $component->name;
                     break;
-                default :
-                    throw new DAV\Exception\BadRequest('You are not allowed to create components of type: ' . $component->name . ' here');
+            }
+
+        }
+
+        if (!$foundType || !in_array($foundType, $supportedComponents)) {
+            throw new Exception\InvalidComponentType('iCalendar objects must at least have a component of type ' . implode(', ', $supportedComponents));
+        }
+
+        $options = VObject\Node::PROFILE_CALDAV;
+        $prefer = $this->server->getHTTPPrefer();
+
+        if ($prefer['handling'] !== 'strict') {
+            $options |= VObject\Node::REPAIR;
+        }
+
+        $messages = $vobj->validate($options);
 
+        $highestLevel = 0;
+        $warningMessage = null;
+
+        // $messages contains a list of problems with the vcard, along with
+        // their severity.
+        foreach ($messages as $message) {
+
+            if ($message['level'] > $highestLevel) {
+                // Recording the highest reported error level.
+                $highestLevel = $message['level'];
+                $warningMessage = $message['message'];
             }
+            switch ($message['level']) {
+
+                case 1 :
+                    // Level 1 means that there was a problem, but it was repaired.
+                    $modified = true;
+                    break;
+                case 2 :
+                    // Level 2 means a warning, but not critical
+                    break;
+                case 3 :
+                    // Level 3 means a critical error
+                    throw new DAV\Exception\UnsupportedMediaType('Validation error in iCalendar: ' . $message['message']);
+
+            }
+
+        }
+        if ($warningMessage) {
+            $response->setHeader(
+                'X-Sabre-Ew-Gross',
+                'iCalendar validation warning: ' . $warningMessage
+            );
         }
-        if (!$foundType)
-            throw new DAV\Exception\BadRequest('iCalendar object must contain at least 1 of VEVENT, VTODO or VJOURNAL');
 
         // We use an extra variable to allow event handles to tell us wether
         // the object was modified or not.
@@ -917,12 +944,12 @@ class Plugin extends DAV\ServerPlugin {
             ]
         );
 
-        if ($subModified) {
+        if ($modified || $subModified) {
             // An event handler told us that it modified the object.
             $data = $vobj->serialize();
 
             // Using md5 to figure out if there was an *actual* change.
-            if (!$modified && $before !== md5($data)) {
+            if (!$modified && strcmp($data, $before) !== 0) {
                 $modified = true;
             }
 
@@ -933,6 +960,22 @@ class Plugin extends DAV\ServerPlugin {
 
     }
 
+    /**
+     * This method is triggered whenever a subsystem reqeuests the privileges
+     * that are supported on a particular node.
+     *
+     * @param INode $node
+     * @param array $supportedPrivilegeSet
+     */
+    function getSupportedPrivilegeSet(INode $node, array &$supportedPrivilegeSet) {
+
+        if ($node instanceof ICalendar) {
+            $supportedPrivilegeSet['{DAV:}read']['aggregates']['{' . self::NS_CALDAV . '}read-free-busy'] = [
+                'abstract'   => false,
+                'aggregates' => [],
+            ];
+        }
+    }
 
     /**
      * This method is used to generate HTML output for the
diff --git a/vendor/sabre/dav/lib/CalDAV/Schedule/Inbox.php b/vendor/sabre/dav/lib/CalDAV/Schedule/Inbox.php
index 13212565e..6b374ea3f 100644
--- a/vendor/sabre/dav/lib/CalDAV/Schedule/Inbox.php
+++ b/vendor/sabre/dav/lib/CalDAV/Schedule/Inbox.php
@@ -17,6 +17,8 @@ use Sabre\VObject;
  */
 class Inbox extends DAV\Collection implements IInbox {
 
+    use DAVACL\ACLTrait;
+
     /**
      * CalDAV backend
      *
@@ -119,19 +121,6 @@ class Inbox extends DAV\Collection implements IInbox {
     }
 
     /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
-
-    /**
      * Returns a list of ACE's for this node.
      *
      * Each ACE has the following properties:
@@ -167,58 +156,11 @@ class Inbox extends DAV\Collection implements IInbox {
                 'protected' => true,
             ],
             [
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-deliver-invite',
+                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-deliver',
                 'principal' => '{DAV:}authenticated',
                 'protected' => true,
             ],
-            [
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-deliver-reply',
-                'principal' => '{DAV:}authenticated',
-                'protected' => true,
-            ],
-        ];
-
-    }
-
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new DAV\Exception\MethodNotAllowed('You\'re not allowed to update the ACL');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        $ns = '{' . CalDAV\Plugin::NS_CALDAV . '}';
-
-        $default = DAVACL\Plugin::getDefaultSupportedPrivilegeSet();
-        $default['aggregates'][] = [
-            'privilege'  => $ns . 'schedule-deliver',
-            'aggregates' => [
-               ['privilege' => $ns . 'schedule-deliver-invite'],
-               ['privilege' => $ns . 'schedule-deliver-reply'],
-            ],
         ];
-        return $default;
 
     }
 
diff --git a/vendor/sabre/dav/lib/CalDAV/Schedule/Outbox.php b/vendor/sabre/dav/lib/CalDAV/Schedule/Outbox.php
index dabaee2ca..29eefa744 100644
--- a/vendor/sabre/dav/lib/CalDAV/Schedule/Outbox.php
+++ b/vendor/sabre/dav/lib/CalDAV/Schedule/Outbox.php
@@ -19,6 +19,8 @@ use Sabre\DAVACL;
  */
 class Outbox extends DAV\Collection implements IOutbox {
 
+    use DAVACL\ACLTrait;
+
     /**
      * The principal Uri
      *
@@ -75,19 +77,6 @@ class Outbox extends DAV\Collection implements IOutbox {
     }
 
     /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
-
-    /**
      * Returns a list of ACE's for this node.
      *
      * Each ACE has the following properties:
@@ -103,12 +92,7 @@ class Outbox extends DAV\Collection implements IOutbox {
 
         return [
             [
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-query-freebusy',
-                'principal' => $this->getOwner(),
-                'protected' => true,
-            ],
-            [
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-post-vevent',
+                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-send',
                 'principal' => $this->getOwner(),
                 'protected' => true,
             ],
@@ -118,12 +102,7 @@ class Outbox extends DAV\Collection implements IOutbox {
                 'protected' => true,
             ],
             [
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-query-freebusy',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
-                'protected' => true,
-            ],
-            [
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-post-vevent',
+                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-send',
                 'principal' => $this->getOwner() . '/calendar-proxy-write',
                 'protected' => true,
             ],
@@ -141,44 +120,4 @@ class Outbox extends DAV\Collection implements IOutbox {
 
     }
 
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new DAV\Exception\MethodNotAllowed('You\'re not allowed to update the ACL');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        $default = DAVACL\Plugin::getDefaultSupportedPrivilegeSet();
-        $default['aggregates'][] = [
-            'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-query-freebusy',
-        ];
-        $default['aggregates'][] = [
-            'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-post-vevent',
-        ];
-
-        return $default;
-
-    }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Schedule/Plugin.php b/vendor/sabre/dav/lib/CalDAV/Schedule/Plugin.php
index 827d6209b..47511140f 100644
--- a/vendor/sabre/dav/lib/CalDAV/Schedule/Plugin.php
+++ b/vendor/sabre/dav/lib/CalDAV/Schedule/Plugin.php
@@ -5,10 +5,12 @@ namespace Sabre\CalDAV\Schedule;
 use DateTimeZone;
 use Sabre\DAV\Server;
 use Sabre\DAV\ServerPlugin;
+use Sabre\DAV\Sharing;
 use Sabre\DAV\PropFind;
 use Sabre\DAV\PropPatch;
 use Sabre\DAV\INode;
 use Sabre\DAV\Xml\Property\Href;
+use Sabre\DAV\Xml\Property\LocalHref;
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 use Sabre\VObject;
@@ -100,12 +102,13 @@ class Plugin extends ServerPlugin {
     function initialize(Server $server) {
 
         $this->server = $server;
-        $server->on('method:POST',          [$this, 'httpPost']);
-        $server->on('propFind',             [$this, 'propFind']);
-        $server->on('propPatch',            [$this, 'propPatch']);
-        $server->on('calendarObjectChange', [$this, 'calendarObjectChange']);
-        $server->on('beforeUnbind',         [$this, 'beforeUnbind']);
-        $server->on('schedule',             [$this, 'scheduleLocalDelivery']);
+        $server->on('method:POST',              [$this, 'httpPost']);
+        $server->on('propFind',                 [$this, 'propFind']);
+        $server->on('propPatch',                [$this, 'propPatch']);
+        $server->on('calendarObjectChange',     [$this, 'calendarObjectChange']);
+        $server->on('beforeUnbind',             [$this, 'beforeUnbind']);
+        $server->on('schedule',                 [$this, 'scheduleLocalDelivery']);
+        $server->on('getSupportedPrivilegeSet', [$this, 'getSupportedPrivilegeSet']);
 
         $ns = '{' . self::NS_CALDAV . '}';
 
@@ -215,7 +218,7 @@ class Plugin extends ServerPlugin {
                 }
                 $outboxPath = $calendarHomePath . '/outbox/';
 
-                return new Href($outboxPath);
+                return new LocalHref($outboxPath);
 
             });
             // schedule-inbox-URL property
@@ -227,7 +230,7 @@ class Plugin extends ServerPlugin {
                 }
                 $inboxPath = $calendarHomePath . '/inbox/';
 
-                return new Href($inboxPath);
+                return new LocalHref($inboxPath);
 
             });
 
@@ -245,18 +248,28 @@ class Plugin extends ServerPlugin {
 
                 $result = $this->server->getPropertiesForPath($calendarHomePath, [
                     '{DAV:}resourcetype',
+                    '{DAV:}share-access',
                     $sccs,
                 ], 1);
 
                 foreach ($result as $child) {
-                    if (!isset($child[200]['{DAV:}resourcetype']) || !$child[200]['{DAV:}resourcetype']->is('{' . self::NS_CALDAV . '}calendar') || $child[200]['{DAV:}resourcetype']->is('{http://calendarserver.org/ns/}shared')) {
-                        // Node is either not a calendar or a shared instance.
+                    if (!isset($child[200]['{DAV:}resourcetype']) || !$child[200]['{DAV:}resourcetype']->is('{' . self::NS_CALDAV . '}calendar')) {
+                        // Node is either not a calendar
                         continue;
                     }
+                    if (isset($child[200]['{DAV:}share-access'])) {
+                        $shareAccess = $child[200]['{DAV:}share-access']->getValue();
+                        if ($shareAccess !== Sharing\Plugin::ACCESS_NOTSHARED && $shareAccess !== Sharing\Plugin::ACCESS_SHAREDOWNER) {
+                            // Node is a shared node, not owned by the relevant
+                            // user.
+                            continue;
+                        }
+
+                    }
                     if (!isset($child[200][$sccs]) || in_array('VEVENT', $child[200][$sccs]->getValue())) {
                         // Either there is no supported-calendar-component-set
                         // (which is fine) or we found one that supports VEVENT.
-                        return new Href($child['href']);
+                        return new LocalHref($child['href']);
                     }
                 }
 
@@ -492,7 +505,7 @@ class Plugin extends ServerPlugin {
         }
 
         if (!$aclPlugin->checkPrivileges($inboxPath, $caldavNS . $privilege, DAVACL\Plugin::R_PARENT, false)) {
-            $iTipMessage->scheduleStatus = '3.8;organizer did not have the ' . $privilege . ' privilege on the attendees inbox';
+            $iTipMessage->scheduleStatus = '3.8;insufficient privileges: ' . $privilege . ' is required on the recipient schedule inbox.';
             return;
         }
 
@@ -561,6 +574,65 @@ class Plugin extends ServerPlugin {
     }
 
     /**
+     * This method is triggered whenever a subsystem requests the privileges
+     * that are supported on a particular node.
+     *
+     * We need to add a number of privileges for scheduling purposes.
+     *
+     * @param INode $node
+     * @param array $supportedPrivilegeSet
+     */
+    function getSupportedPrivilegeSet(INode $node, array &$supportedPrivilegeSet) {
+
+        $ns = '{' . self::NS_CALDAV . '}';
+        if ($node instanceof IOutbox) {
+            $supportedPrivilegeSet[$ns . 'schedule-send'] = [
+                'abstract'   => false,
+                'aggregates' => [
+                    $ns . 'schedule-send-invite' => [
+                        'abstract'   => false,
+                        'aggregates' => [],
+                    ],
+                    $ns . 'schedule-send-reply' => [
+                        'abstract'   => false,
+                        'aggregates' => [],
+                    ],
+                    $ns . 'schedule-send-freebusy' => [
+                        'abstract'   => false,
+                        'aggregates' => [],
+                    ],
+                    // Privilege from an earlier scheduling draft, but still
+                    // used by some clients.
+                    $ns . 'schedule-post-vevent' => [
+                        'abstract'   => false,
+                        'aggregates' => [],
+                    ],
+                ]
+            ];
+        }
+        if ($node instanceof IInbox) {
+            $supportedPrivilegeSet[$ns . 'schedule-deliver'] = [
+                'abstract'   => false,
+                'aggregates' => [
+                    $ns . 'schedule-deliver-invite' => [
+                        'abstract'   => false,
+                        'aggregates' => [],
+                    ],
+                    $ns . 'schedule-deliver-reply' => [
+                        'abstract'   => false,
+                        'aggregates' => [],
+                    ],
+                    $ns . 'schedule-query-freebusy' => [
+                        'abstract'   => false,
+                        'aggregates' => [],
+                    ],
+                ]
+            ];
+        }
+
+    }
+
+    /**
      * This method looks at an old iCalendar object, a new iCalendar object and
      * starts sending scheduling messages based on the changes.
      *
@@ -647,7 +719,7 @@ class Plugin extends ServerPlugin {
     /**
      * This method handles POST requests to the schedule-outbox.
      *
-     * Currently, two types of requests are support:
+     * Currently, two types of requests are supported:
      *   * FREEBUSY requests from RFC 6638
      *   * Simple iTIP messages from draft-desruisseaux-caldav-sched-04
      *
@@ -699,7 +771,7 @@ class Plugin extends ServerPlugin {
 
         if ($componentType === 'VFREEBUSY' && $method === 'REQUEST') {
 
-            $acl && $acl->checkPrivileges($outboxPath, '{' . self::NS_CALDAV . '}schedule-query-freebusy');
+            $acl && $acl->checkPrivileges($outboxPath, '{' . self::NS_CALDAV . '}schedule-send-freebusy');
             $this->handleFreeBusyRequest($outboxNode, $vObject, $request, $response);
 
             // Destroy circular references so PHP can GC the object.
@@ -727,7 +799,7 @@ class Plugin extends ServerPlugin {
     protected function handleFreeBusyRequest(IOutbox $outbox, VObject\Component $vObject, RequestInterface $request, ResponseInterface $response) {
 
         $vFreeBusy = $vObject->VFREEBUSY;
-        $organizer = $vFreeBusy->organizer;
+        $organizer = $vFreeBusy->ORGANIZER;
 
         $organizer = (string)$organizer;
 
@@ -863,6 +935,9 @@ class Plugin extends ServerPlugin {
         $homeSet = $result[0][200][$caldavNS . 'calendar-home-set']->getHref();
         $inboxUrl = $result[0][200][$caldavNS . 'schedule-inbox-URL']->getHref();
 
+        // Do we have permission?
+        $aclPlugin->checkPrivileges($inboxUrl, $caldavNS . 'schedule-query-freebusy');
+
         // Grabbing the calendar list
         $objects = [];
         $calendarTimeZone = new DateTimeZone('UTC');
@@ -882,8 +957,6 @@ class Plugin extends ServerPlugin {
                 continue;
             }
 
-            $aclPlugin->checkPrivileges($homeSet . $node->getName(), $caldavNS . 'read-free-busy');
-
             if (isset($props[$ctz])) {
                 $vtimezoneObj = VObject\Reader::read($props[$ctz]);
                 $calendarTimeZone = $vtimezoneObj->VTIMEZONE->getTimeZone();
diff --git a/vendor/sabre/dav/lib/CalDAV/Schedule/SchedulingObject.php b/vendor/sabre/dav/lib/CalDAV/Schedule/SchedulingObject.php
index a36646e6c..6d9d3d5ec 100644
--- a/vendor/sabre/dav/lib/CalDAV/Schedule/SchedulingObject.php
+++ b/vendor/sabre/dav/lib/CalDAV/Schedule/SchedulingObject.php
@@ -134,22 +134,12 @@ class SchedulingObject extends \Sabre\CalDAV\CalendarObject implements IScheduli
         // The default ACL
         return [
             [
-                'privilege' => '{DAV:}read',
-                'principal' => $this->objectData['principaluri'],
-                'protected' => true,
-            ],
-            [
-                'privilege' => '{DAV:}write',
-                'principal' => $this->objectData['principaluri'],
-                'protected' => true,
-            ],
-            [
-                'privilege' => '{DAV:}read',
-                'principal' => $this->objectData['principaluri'] . '/calendar-proxy-write',
+                'privilege' => '{DAV:}all',
+                'principal' => '{DAV:}owner',
                 'protected' => true,
             ],
             [
-                'privilege' => '{DAV:}write',
+                'privilege' => '{DAV:}all',
                 'principal' => $this->objectData['principaluri'] . '/calendar-proxy-write',
                 'protected' => true,
             ],
diff --git a/vendor/sabre/dav/lib/CalDAV/ShareableCalendar.php b/vendor/sabre/dav/lib/CalDAV/ShareableCalendar.php
deleted file mode 100644
index c11695d5f..000000000
--- a/vendor/sabre/dav/lib/CalDAV/ShareableCalendar.php
+++ /dev/null
@@ -1,72 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-/**
- * This object represents a CalDAV calendar that can be shared with other
- * users.
- *
- * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class ShareableCalendar extends Calendar implements IShareableCalendar {
-
-    /**
-     * Updates the list of shares.
-     *
-     * The first array is a list of people that are to be added to the
-     * calendar.
-     *
-     * Every element in the add array has the following properties:
-     *   * href - A url. Usually a mailto: address
-     *   * commonName - Usually a first and last name, or false
-     *   * summary - A description of the share, can also be false
-     *   * readOnly - A boolean value
-     *
-     * Every element in the remove array is just the address string.
-     *
-     * @param array $add
-     * @param array $remove
-     * @return void
-     */
-    function updateShares(array $add, array $remove) {
-
-        $this->caldavBackend->updateShares($this->calendarInfo['id'], $add, $remove);
-
-    }
-
-    /**
-     * Returns the list of people whom this calendar is shared with.
-     *
-     * Every element in this array should have the following properties:
-     *   * href - Often a mailto: address
-     *   * commonName - Optional, for example a first + last name
-     *   * status - See the Sabre\CalDAV\SharingPlugin::STATUS_ constants.
-     *   * readOnly - boolean
-     *   * summary - Optional, a description for the share
-     *
-     * @return array
-     */
-    function getShares() {
-
-        return $this->caldavBackend->getShares($this->calendarInfo['id']);
-
-    }
-
-    /**
-     * Marks this calendar as published.
-     *
-     * Publishing a calendar should automatically create a read-only, public,
-     * subscribable calendar.
-     *
-     * @param bool $value
-     * @return void
-     */
-    function setPublishStatus($value) {
-
-        $this->caldavBackend->setPublishStatus($this->calendarInfo['id'], $value);
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/CalDAV/SharedCalendar.php b/vendor/sabre/dav/lib/CalDAV/SharedCalendar.php
index 7973eff9c..7a77616e3 100644
--- a/vendor/sabre/dav/lib/CalDAV/SharedCalendar.php
+++ b/vendor/sabre/dav/lib/CalDAV/SharedCalendar.php
@@ -2,6 +2,8 @@
 
 namespace Sabre\CalDAV;
 
+use Sabre\DAV\Sharing\Plugin as SPlugin;
+
 /**
  * This object represents a CalDAV calendar that is shared by a different user.
  *
@@ -12,50 +14,84 @@ namespace Sabre\CalDAV;
 class SharedCalendar extends Calendar implements ISharedCalendar {
 
     /**
-     * Constructor
+     * Returns the 'access level' for the instance of this shared resource.
+     *
+     * The value should be one of the Sabre\DAV\Sharing\Plugin::ACCESS_
+     * constants.
      *
-     * @param Backend\BackendInterface $caldavBackend
-     * @param array $calendarInfo
+     * @return int
      */
-    function __construct(Backend\BackendInterface $caldavBackend, $calendarInfo) {
-
-        $required = [
-            '{http://calendarserver.org/ns/}shared-url',
-            '{http://sabredav.org/ns}owner-principal',
-            '{http://sabredav.org/ns}read-only',
-        ];
-        foreach ($required as $r) {
-            if (!isset($calendarInfo[$r])) {
-                throw new \InvalidArgumentException('The ' . $r . ' property must be specified for SharedCalendar(s)');
-            }
-        }
+    function getShareAccess() {
 
-        parent::__construct($caldavBackend, $calendarInfo);
+        return isset($this->calendarInfo['share-access']) ? $this->calendarInfo['share-access'] : SPlugin::ACCESS_NOTSHARED;
 
     }
 
     /**
-     * This method should return the url of the owners' copy of the shared
-     * calendar.
+     * This function must return a URI that uniquely identifies the shared
+     * resource. This URI should be identical across instances, and is
+     * also used in several other XML bodies to connect invites to
+     * resources.
+     *
+     * This may simply be a relative reference to the original shared instance,
+     * but it could also be a urn. As long as it's a valid URI and unique.
      *
      * @return string
      */
-    function getSharedUrl() {
+    function getShareResourceUri() {
+
+        return $this->calendarInfo['share-resource-uri'];
+
+    }
+
+    /**
+     * Updates the list of sharees.
+     *
+     * Every item must be a Sharee object.
+     *
+     * @param \Sabre\DAV\Xml\Element\Sharee[] $sharees
+     * @return void
+     */
+    function updateInvites(array $sharees) {
 
-        return $this->calendarInfo['{http://calendarserver.org/ns/}shared-url'];
+        $this->caldavBackend->updateInvites($this->calendarInfo['id'], $sharees);
 
     }
 
     /**
-     * Returns the owner principal
+     * Returns the list of people whom this resource is shared with.
+     *
+     * Every item in the returned array must be a Sharee object with
+     * at least the following properties set:
+     *
+     * * $href
+     * * $shareAccess
+     * * $inviteStatus
      *
-     * This must be a url to a principal, or null if there's no owner
+     * and optionally:
      *
-     * @return string|null
+     * * $properties
+     *
+     * @return \Sabre\DAV\Xml\Element\Sharee[]
      */
-    function getOwner() {
+    function getInvites() {
 
-        return $this->calendarInfo['{http://sabredav.org/ns}owner-principal'];
+        return $this->caldavBackend->getInvites($this->calendarInfo['id']);
+
+    }
+
+    /**
+     * Marks this calendar as published.
+     *
+     * Publishing a calendar should automatically create a read-only, public,
+     * subscribable calendar.
+     *
+     * @param bool $value
+     * @return void
+     */
+    function setPublishStatus($value) {
+
+        $this->caldavBackend->setPublishStatus($this->calendarInfo['id'], $value);
 
     }
 
@@ -73,32 +109,72 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      */
     function getACL() {
 
-        // The top-level ACL only contains access information for the true
-        // owner of the calendar, so we need to add the information for the
-        // sharee.
-        $acl = parent::getACL();
-        $acl[] = [
-            'privilege' => '{DAV:}read',
-            'principal' => $this->calendarInfo['principaluri'],
-            'protected' => true,
-        ];
-        if ($this->calendarInfo['{http://sabredav.org/ns}read-only']) {
-            $acl[] = [
-                'privilege' => '{DAV:}write-properties',
-                'principal' => $this->calendarInfo['principaluri'],
-                'protected' => true,
-            ];
-        } else {
-            $acl[] = [
-                'privilege' => '{DAV:}write',
-                'principal' => $this->calendarInfo['principaluri'],
-                'protected' => true,
-            ];
+        $acl = [];
+
+        switch ($this->getShareAccess()) {
+            case SPlugin::ACCESS_NOTSHARED :
+            case SPlugin::ACCESS_SHAREDOWNER :
+                $acl[] = [
+                    'privilege' => '{DAV:}share',
+                    'principal' => $this->calendarInfo['principaluri'],
+                    'protected' => true,
+                ];
+                $acl[] = [
+                    'privilege' => '{DAV:}share',
+                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
+                    'protected' => true,
+                ];
+                // No break intentional!
+            case SPlugin::ACCESS_READWRITE :
+                $acl[] = [
+                    'privilege' => '{DAV:}write',
+                    'principal' => $this->calendarInfo['principaluri'],
+                    'protected' => true,
+                ];
+                $acl[] = [
+                    'privilege' => '{DAV:}write',
+                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
+                    'protected' => true,
+                ];
+                // No break intentional!
+            case SPlugin::ACCESS_READ :
+                $acl[] = [
+                    'privilege' => '{DAV:}write-properties',
+                    'principal' => $this->calendarInfo['principaluri'],
+                    'protected' => true,
+                ];
+                $acl[] = [
+                    'privilege' => '{DAV:}write-properties',
+                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
+                    'protected' => true,
+                ];
+                $acl[] = [
+                    'privilege' => '{DAV:}read',
+                    'principal' => $this->calendarInfo['principaluri'],
+                    'protected' => true,
+                ];
+                $acl[] = [
+                    'privilege' => '{DAV:}read',
+                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-read',
+                    'protected' => true,
+                ];
+                $acl[] = [
+                    'privilege' => '{DAV:}read',
+                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
+                    'protected' => true,
+                ];
+                $acl[] = [
+                    'privilege' => '{' . Plugin::NS_CALDAV . '}read-free-busy',
+                    'principal' => '{DAV:}authenticated',
+                    'protected' => true,
+                ];
+                break;
         }
         return $acl;
 
     }
 
+
     /**
      * This method returns the ACL's for calendar objects in this calendar.
      * The result of this method automatically gets passed to the
@@ -108,40 +184,45 @@ class SharedCalendar extends Calendar implements ISharedCalendar {
      */
     function getChildACL() {
 
-        $acl = parent::getChildACL();
-        $acl[] = [
-            'privilege' => '{DAV:}read',
-            'principal' => $this->calendarInfo['principaluri'],
-            'protected' => true,
-        ];
-
-        if (!$this->calendarInfo['{http://sabredav.org/ns}read-only']) {
-            $acl[] = [
-                'privilege' => '{DAV:}write',
-                'principal' => $this->calendarInfo['principaluri'],
-                'protected' => true,
-            ];
+        $acl = [];
+
+        switch ($this->getShareAccess()) {
+            case SPlugin::ACCESS_NOTSHARED :
+                // No break intentional
+            case SPlugin::ACCESS_SHAREDOWNER :
+                // No break intentional
+            case SPlugin::ACCESS_READWRITE:
+                $acl[] = [
+                    'privilege' => '{DAV:}write',
+                    'principal' => $this->calendarInfo['principaluri'],
+                    'protected' => true,
+                ];
+                $acl[] = [
+                    'privilege' => '{DAV:}write',
+                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
+                    'protected' => true,
+                ];
+                // No break intentional
+            case SPlugin::ACCESS_READ:
+                $acl[] = [
+                    'privilege' => '{DAV:}read',
+                    'principal' => $this->calendarInfo['principaluri'],
+                    'protected' => true,
+                ];
+                $acl[] = [
+                    'privilege' => '{DAV:}read',
+                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
+                    'protected' => true,
+                ];
+                $acl[] = [
+                    'privilege' => '{DAV:}read',
+                    'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-read',
+                    'protected' => true,
+                ];
+                break;
         }
-        return $acl;
-
-    }
 
-
-    /**
-     * Returns the list of people whom this calendar is shared with.
-     *
-     * Every element in this array should have the following properties:
-     *   * href - Often a mailto: address
-     *   * commonName - Optional, for example a first + last name
-     *   * status - See the Sabre\CalDAV\SharingPlugin::STATUS_ constants.
-     *   * readOnly - boolean
-     *   * summary - Optional, a description for the share
-     *
-     * @return array
-     */
-    function getShares() {
-
-        return $this->caldavBackend->getShares($this->calendarInfo['id']);
+        return $acl;
 
     }
 
diff --git a/vendor/sabre/dav/lib/CalDAV/SharingPlugin.php b/vendor/sabre/dav/lib/CalDAV/SharingPlugin.php
index 5154fb1de..6f7df02bc 100644
--- a/vendor/sabre/dav/lib/CalDAV/SharingPlugin.php
+++ b/vendor/sabre/dav/lib/CalDAV/SharingPlugin.php
@@ -4,6 +4,7 @@ namespace Sabre\CalDAV;
 
 use Sabre\DAV;
 use Sabre\DAV\Xml\Property\Href;
+use Sabre\DAV\Xml\Property\LocalHref;
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 
@@ -26,15 +27,6 @@ use Sabre\HTTP\ResponseInterface;
 class SharingPlugin extends DAV\ServerPlugin {
 
     /**
-     * These are the various status constants used by sharing-messages.
-     */
-    const STATUS_ACCEPTED = 1;
-    const STATUS_DECLINED = 2;
-    const STATUS_DELETED = 3;
-    const STATUS_NORESPONSE = 4;
-    const STATUS_INVALID = 5;
-
-    /**
      * Reference to SabreDAV server object.
      *
      * @var Sabre\DAV\Server
@@ -83,7 +75,10 @@ class SharingPlugin extends DAV\ServerPlugin {
     function initialize(DAV\Server $server) {
 
         $this->server = $server;
-        $server->resourceTypeMapping['Sabre\\CalDAV\\ISharedCalendar'] = '{' . Plugin::NS_CALENDARSERVER . '}shared';
+
+        if (is_null($this->server->getPlugin('sharing'))) {
+            throw new \LogicException('The generic "sharing" plugin must be loaded before the caldav sharing plugin. Call $server->addPlugin(new \Sabre\DAV\Sharing\Plugin()); before this one.');
+        }
 
         array_push(
             $this->server->protectedProperties,
@@ -114,24 +109,8 @@ class SharingPlugin extends DAV\ServerPlugin {
      */
     function propFindEarly(DAV\PropFind $propFind, DAV\INode $node) {
 
-        if ($node instanceof IShareableCalendar) {
-
-            $propFind->handle('{' . Plugin::NS_CALENDARSERVER . '}invite', function() use ($node) {
-                return new Xml\Property\Invite(
-                    $node->getShares()
-                );
-            });
-
-        }
-
         if ($node instanceof ISharedCalendar) {
 
-            $propFind->handle('{' . Plugin::NS_CALENDARSERVER . '}shared-url', function() use ($node) {
-                return new Href(
-                    $node->getSharedUrl()
-                );
-            });
-
             $propFind->handle('{' . Plugin::NS_CALENDARSERVER . '}invite', function() use ($node) {
 
                 // Fetching owner information
@@ -158,7 +137,7 @@ class SharingPlugin extends DAV\ServerPlugin {
                 }
 
                 return new Xml\Property\Invite(
-                    $node->getShares(),
+                    $node->getInvites(),
                     $ownerInfo
                 );
 
@@ -179,10 +158,18 @@ class SharingPlugin extends DAV\ServerPlugin {
      */
     function propFindLate(DAV\PropFind $propFind, DAV\INode $node) {
 
-        if ($node instanceof IShareableCalendar) {
+        if ($node instanceof ISharedCalendar) {
+            $shareAccess = $node->getShareAccess();
             if ($rt = $propFind->get('{DAV:}resourcetype')) {
-                if (count($node->getShares()) > 0) {
-                    $rt->add('{' . Plugin::NS_CALENDARSERVER . '}shared-owner');
+                switch ($shareAccess) {
+                    case \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER :
+                        $rt->add('{' . Plugin::NS_CALENDARSERVER . '}shared-owner');
+                        break;
+                    case \Sabre\DAV\Sharing\Plugin::ACCESS_READ :
+                    case \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE :
+                        $rt->add('{' . Plugin::NS_CALENDARSERVER . '}shared');
+                        break;
+
                 }
             }
             $propFind->handle('{' . Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes', function() {
@@ -211,21 +198,24 @@ class SharingPlugin extends DAV\ServerPlugin {
     function propPatch($path, DAV\PropPatch $propPatch) {
 
         $node = $this->server->tree->getNodeForPath($path);
-        if (!$node instanceof IShareableCalendar)
+        if (!$node instanceof ISharedCalendar)
             return;
 
-        $propPatch->handle('{DAV:}resourcetype', function($value) use ($node) {
-            if ($value->is('{' . Plugin::NS_CALENDARSERVER . '}shared-owner')) return false;
-            $shares = $node->getShares();
-            $remove = [];
-            foreach ($shares as $share) {
-                $remove[] = $share['href'];
-            }
-            $node->updateShares([], $remove);
+        if ($node->getShareAccess() === \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER || $node->getShareAccess() === \Sabre\DAV\Sharing\Plugin::ACCESS_NOTSHARED) {
 
-            return true;
+            $propPatch->handle('{DAV:}resourcetype', function($value) use ($node) {
+                if ($value->is('{' . Plugin::NS_CALENDARSERVER . '}shared-owner')) return false;
+                $shares = $node->getInvites();
+                foreach ($shares as $share) {
+                    $share->access = DAV\Sharing\Plugin::ACCESS_NOACCESS;
+                }
+                $node->updateInvites($shares);
 
-        });
+                return true;
+
+            });
+
+        }
 
     }
 
@@ -267,26 +257,12 @@ class SharingPlugin extends DAV\ServerPlugin {
 
         switch ($documentType) {
 
-            // Dealing with the 'share' document, which modified invitees on a
-            // calendar.
+            // Both the DAV:share-resource and CALENDARSERVER:share requests
+            // behave identically.
             case '{' . Plugin::NS_CALENDARSERVER . '}share' :
 
-                // We can only deal with IShareableCalendar objects
-                if (!$node instanceof IShareableCalendar) {
-                    return;
-                }
-
-                $this->server->transactionType = 'post-calendar-share';
-
-                // Getting ACL info
-                $acl = $this->server->getPlugin('acl');
-
-                // If there's no ACL support, we allow everything
-                if ($acl) {
-                    $acl->checkPrivileges($path, '{DAV:}write');
-                }
-
-                $node->updateShares($message->set, $message->remove);
+                $sharingPlugin = $this->server->getPlugin('sharing');
+                $sharingPlugin->shareResource($path, $message->sharees);
 
                 $response->setStatus(200);
                 // Adding this because sending a response body may cause issues,
@@ -328,11 +304,11 @@ class SharingPlugin extends DAV\ServerPlugin {
                 $response->setHeader('X-Sabre-Status', 'everything-went-well');
 
                 if ($url) {
-                    $writer = $this->server->xml->getWriter($this->server->getBaseUri());
+                    $writer = $this->server->xml->getWriter();
                     $writer->openMemory();
                     $writer->startDocument();
                     $writer->startElement('{' . Plugin::NS_CALENDARSERVER . '}shared-as');
-                    $writer->write(new Href($url));
+                    $writer->write(new LocalHref($url));
                     $writer->endElement();
                     $response->setHeader('Content-Type', 'application/xml');
                     $response->setBody($writer->outputMemory());
@@ -345,7 +321,7 @@ class SharingPlugin extends DAV\ServerPlugin {
             case '{' . Plugin::NS_CALENDARSERVER . '}publish-calendar' :
 
                 // We can only deal with IShareableCalendar objects
-                if (!$node instanceof IShareableCalendar) {
+                if (!$node instanceof ISharedCalendar) {
                     return;
                 }
                 $this->server->transactionType = 'post-publish-calendar';
@@ -355,7 +331,7 @@ class SharingPlugin extends DAV\ServerPlugin {
 
                 // If there's no ACL support, we allow everything
                 if ($acl) {
-                    $acl->checkPrivileges($path, '{DAV:}write');
+                    $acl->checkPrivileges($path, '{DAV:}share');
                 }
 
                 $node->setPublishStatus(true);
@@ -373,7 +349,7 @@ class SharingPlugin extends DAV\ServerPlugin {
             case '{' . Plugin::NS_CALENDARSERVER . '}unpublish-calendar' :
 
                 // We can only deal with IShareableCalendar objects
-                if (!$node instanceof IShareableCalendar) {
+                if (!$node instanceof ISharedCalendar) {
                     return;
                 }
                 $this->server->transactionType = 'post-unpublish-calendar';
@@ -383,7 +359,7 @@ class SharingPlugin extends DAV\ServerPlugin {
 
                 // If there's no ACL support, we allow everything
                 if ($acl) {
-                    $acl->checkPrivileges($path, '{DAV:}write');
+                    $acl->checkPrivileges($path, '{DAV:}share');
                 }
 
                 $node->setPublishStatus(false);
diff --git a/vendor/sabre/dav/lib/CalDAV/Subscriptions/Subscription.php b/vendor/sabre/dav/lib/CalDAV/Subscriptions/Subscription.php
index ee53da2c6..3bb3451f3 100644
--- a/vendor/sabre/dav/lib/CalDAV/Subscriptions/Subscription.php
+++ b/vendor/sabre/dav/lib/CalDAV/Subscriptions/Subscription.php
@@ -5,8 +5,8 @@ namespace Sabre\CalDAV\Subscriptions;
 use Sabre\DAV\Collection;
 use Sabre\DAV\Xml\Property\Href;
 use Sabre\DAV\PropPatch;
-use Sabre\DAV\Exception\MethodNotAllowed;
 use Sabre\DAVACL\IACL;
+use Sabre\DAVACL\ACLTrait;
 use Sabre\CalDAV\Backend\SubscriptionSupport;
 
 /**
@@ -20,6 +20,8 @@ use Sabre\CalDAV\Backend\SubscriptionSupport;
  */
 class Subscription extends Collection implements ISubscription, IACL {
 
+    use ACLTrait;
+
     /**
      * caldavBackend
      *
@@ -144,7 +146,7 @@ class Subscription extends Collection implements ISubscription, IACL {
      * The Server class will filter out the extra.
      *
      * @param array $properties
-     * @return void
+     * @return array
      */
     function getProperties($properties) {
 
@@ -154,7 +156,7 @@ class Subscription extends Collection implements ISubscription, IACL {
 
             switch ($prop) {
                 case '{http://calendarserver.org/ns/}source' :
-                    $r[$prop] = new Href($this->subscriptionInfo['source'], false);
+                    $r[$prop] = new Href($this->subscriptionInfo['source']);
                     break;
                 default :
                     if (array_key_exists($prop, $this->subscriptionInfo)) {
@@ -183,19 +185,6 @@ class Subscription extends Collection implements ISubscription, IACL {
     }
 
     /**
-     * Returns a group principal.
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
-
-    /**
      * Returns a list of ACE's for this node.
      *
      * Each ACE has the following properties:
@@ -211,22 +200,12 @@ class Subscription extends Collection implements ISubscription, IACL {
 
         return [
             [
-                'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner(),
-                'protected' => true,
-            ],
-            [
-                'privilege' => '{DAV:}write',
+                'privilege' => '{DAV:}all',
                 'principal' => $this->getOwner(),
                 'protected' => true,
             ],
             [
-                'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
-                'protected' => true,
-            ],
-            [
-                'privilege' => '{DAV:}write',
+                'privilege' => '{DAV:}all',
                 'principal' => $this->getOwner() . '/calendar-proxy-write',
                 'protected' => true,
             ],
@@ -239,36 +218,4 @@ class Subscription extends Collection implements ISubscription, IACL {
 
     }
 
-    /**
-     * Updates the ACL.
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new MethodNotAllowed('Changing ACL is not yet supported');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See \Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/Invite.php b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/Invite.php
index 7fb022e33..1ca64f3e8 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/Invite.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/Invite.php
@@ -5,6 +5,7 @@ namespace Sabre\CalDAV\Xml\Notification;
 use Sabre\Xml\Writer;
 use Sabre\CalDAV\SharingPlugin as SharingPlugin;
 use Sabre\CalDAV;
+use Sabre\DAV;
 
 /**
  * This class represents the cs:invite-notification notification element.
@@ -210,16 +211,10 @@ class Invite implements NotificationInterface {
 
         switch ($this->type) {
 
-            case SharingPlugin::STATUS_ACCEPTED :
+            case DAV\Sharing\Plugin::INVITE_ACCEPTED :
                 $writer->writeElement($cs . 'invite-accepted');
                 break;
-            case SharingPlugin::STATUS_DECLINED :
-                $writer->writeElement($cs . 'invite-declined');
-                break;
-            case SharingPlugin::STATUS_DELETED :
-                $writer->writeElement($cs . 'invite-deleted');
-                break;
-            case SharingPlugin::STATUS_NORESPONSE :
+            case DAV\Sharing\Plugin::INVITE_NORESPONSE :
                 $writer->writeElement($cs . 'invite-noresponse');
                 break;
 
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/InviteReply.php b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/InviteReply.php
index 945323fed..51bfc178a 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Notification/InviteReply.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Notification/InviteReply.php
@@ -5,6 +5,7 @@ namespace Sabre\CalDAV\Xml\Notification;
 use Sabre\Xml\Writer;
 use Sabre\CalDAV;
 use Sabre\CalDAV\SharingPlugin;
+use Sabre\DAV;
 
 /**
  * This class represents the cs:invite-reply notification element.
@@ -162,10 +163,10 @@ class InviteReply implements NotificationInterface {
 
         switch ($this->type) {
 
-            case SharingPlugin::STATUS_ACCEPTED :
+            case DAV\Sharing\Plugin::INVITE_ACCEPTED :
                 $writer->writeElement($cs . 'invite-accepted');
                 break;
-            case SharingPlugin::STATUS_DECLINED :
+            case DAV\Sharing\Plugin::INVITE_DECLINED :
                 $writer->writeElement($cs . 'invite-declined');
                 break;
 
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/Invite.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/Invite.php
index 3ee053214..40ff6b936 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/Invite.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/Invite.php
@@ -2,11 +2,10 @@
 
 namespace Sabre\CalDAV\Xml\Property;
 
-use Sabre\Xml\Element;
-use Sabre\Xml\Reader;
+use Sabre\Xml\XmlSerializable;
 use Sabre\Xml\Writer;
 use Sabre\CalDAV\Plugin;
-use Sabre\CalDAV\SharingPlugin;
+use Sabre\DAV;
 
 /**
  * Invite property
@@ -20,53 +19,23 @@ use Sabre\CalDAV\SharingPlugin;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Invite implements Element {
+class Invite implements XmlSerializable {
 
     /**
      * The list of users a calendar has been shared to.
      *
-     * @var array
+     * @var Sharee[]
      */
-    protected $users;
-
-    /**
-     * The organizer contains information about the person who shared the
-     * object.
-     *
-     * @var array
-     */
-    protected $organizer;
+    protected $sharees;
 
     /**
      * Creates the property.
      *
-     * Users is an array. Each element of the array has the following
-     * properties:
-     *
-     *   * href - Often a mailto: address
-     *   * commonName - Optional, for example a first and lastname for a user.
-     *   * status - One of the SharingPlugin::STATUS_* constants.
-     *   * readOnly - true or false
-     *   * summary - Optional, description of the share
-     *
-     * The organizer key is optional to specify. It's only useful when a
-     * 'sharee' requests the sharing information.
-     *
-     * The organizer may have the following properties:
-     *   * href - Often a mailto: address.
-     *   * commonName - Optional human-readable name.
-     *   * firstName - Optional first name.
-     *   * lastName - Optional last name.
-     *
-     * If you wonder why these two structures are so different, I guess a
-     * valid answer is that the current spec is still a draft.
-     *
-     * @param array $users
+     * @param Sharee[] $sharees
      */
-    function __construct(array $users, array $organizer = null) {
+    function __construct(array $sharees) {
 
-        $this->users = $users;
-        $this->organizer = $organizer;
+        $this->sharees = $sharees;
 
     }
 
@@ -77,7 +46,7 @@ class Invite implements Element {
      */
     function getValue() {
 
-        return $this->users;
+        return $this->sharees;
 
     }
 
@@ -104,149 +73,55 @@ class Invite implements Element {
 
         $cs = '{' . Plugin::NS_CALENDARSERVER . '}';
 
-        if (!is_null($this->organizer)) {
-
-            $writer->startElement($cs . 'organizer');
-            $writer->writeElement('{DAV:}href', $this->organizer['href']);
-
-            if (isset($this->organizer['commonName']) && $this->organizer['commonName']) {
-                $writer->writeElement($cs . 'common-name', $this->organizer['commonName']);
-            }
-            if (isset($this->organizer['firstName']) && $this->organizer['firstName']) {
-                $writer->writeElement($cs . 'first-name', $this->organizer['firstName']);
-            }
-            if (isset($this->organizer['lastName']) && $this->organizer['lastName']) {
-                $writer->writeElement($cs . 'last-name', $this->organizer['lastName']);
-            }
-            $writer->endElement(); // organizer
+        foreach ($this->sharees as $sharee) {
 
-        }
-
-        foreach ($this->users as $user) {
-
-            $writer->startElement($cs . 'user');
-            $writer->writeElement('{DAV:}href', $user['href']);
-            if (isset($user['commonName']) && $user['commonName']) {
-                $writer->writeElement($cs . 'common-name', $user['commonName']);
-            }
-            switch ($user['status']) {
-
-                case SharingPlugin::STATUS_ACCEPTED :
-                    $writer->writeElement($cs . 'invite-accepted');
-                    break;
-                case SharingPlugin::STATUS_DECLINED :
-                    $writer->writeElement($cs . 'invite-declined');
-                    break;
-                case SharingPlugin::STATUS_NORESPONSE :
-                    $writer->writeElement($cs . 'invite-noresponse');
-                    break;
-                case SharingPlugin::STATUS_INVALID :
-                    $writer->writeElement($cs . 'invite-invalid');
-                    break;
-            }
-
-            $writer->startElement($cs . 'access');
-            if ($user['readOnly']) {
-                $writer->writeElement($cs . 'read');
+            if ($sharee->access === \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER) {
+                $writer->startElement($cs . 'organizer');
             } else {
-                $writer->writeElement($cs . 'read-write');
-            }
-            $writer->endElement(); // access
-
-            if (isset($user['summary']) && $user['summary']) {
-                $writer->writeElement($cs . 'summary', $user['summary']);
-            }
-
-            $writer->endElement(); //user
-
-        }
-
-    }
-
-    /**
-     * The deserialize method is called during xml parsing.
-     *
-     * This method is called statictly, this is because in theory this method
-     * may be used as a type of constructor, or factory method.
-     *
-     * Often you want to return an instance of the current class, but you are
-     * free to return other data as well.
-     *
-     * You are responsible for advancing the reader to the next element. Not
-     * doing anything will result in a never-ending loop.
-     *
-     * If you just want to skip parsing for this element altogether, you can
-     * just call $reader->next();
-     *
-     * $reader->parseInnerTree() will parse the entire sub-tree, and advance to
-     * the next element.
-     *
-     * @param Reader $reader
-     * @return mixed
-     */
-    static function xmlDeserialize(Reader $reader) {
-
-        $cs = '{' . Plugin::NS_CALENDARSERVER . '}';
-
-        $users = [];
-
-        foreach ($reader->parseInnerTree() as $elem) {
+                $writer->startElement($cs . 'user');
 
-            if ($elem['name'] !== $cs . 'user')
-                continue;
-
-            $user = [
-                'href'       => null,
-                'commonName' => null,
-                'readOnly'   => null,
-                'summary'    => null,
-                'status'     => null,
-            ];
-
-            foreach ($elem['value'] as $userElem) {
-
-                switch ($userElem['name']) {
-                    case $cs . 'invite-accepted' :
-                        $user['status'] = SharingPlugin::STATUS_ACCEPTED;
-                        break;
-                    case $cs . 'invite-declined' :
-                        $user['status'] = SharingPlugin::STATUS_DECLINED;
+                switch ($sharee->inviteStatus) {
+                    case DAV\Sharing\Plugin::INVITE_ACCEPTED :
+                        $writer->writeElement($cs . 'invite-accepted');
                         break;
-                    case $cs . 'invite-noresponse' :
-                        $user['status'] = SharingPlugin::STATUS_NORESPONSE;
+                    case DAV\Sharing\Plugin::INVITE_DECLINED :
+                        $writer->writeElement($cs . 'invite-declined');
                         break;
-                    case $cs . 'invite-invalid' :
-                        $user['status'] = SharingPlugin::STATUS_INVALID;
+                    case DAV\Sharing\Plugin::INVITE_NORESPONSE :
+                        $writer->writeElement($cs . 'invite-noresponse');
                         break;
-                    case '{DAV:}href' :
-                        $user['href'] = $userElem['value'];
+                    case DAV\Sharing\Plugin::INVITE_INVALID :
+                        $writer->writeElement($cs . 'invite-invalid');
                         break;
-                    case $cs . 'common-name' :
-                        $user['commonName'] = $userElem['value'];
-                        break;
-                    case $cs . 'access' :
-                        foreach ($userElem['value'] as $accessHref) {
-                            if ($accessHref['name'] === $cs . 'read') {
-                                $user['readOnly'] = true;
-                            }
-                        }
+                }
+
+                $writer->startElement($cs . 'access');
+                switch ($sharee->access) {
+                    case DAV\Sharing\Plugin::ACCESS_READWRITE :
+                        $writer->writeElement($cs . 'read-write');
                         break;
-                    case $cs . 'summary' :
-                        $user['summary'] = $userElem['value'];
+                    case DAV\Sharing\Plugin::ACCESS_READ :
+                        $writer->writeElement($cs . 'read');
                         break;
 
                 }
+                $writer->endElement(); // access
 
             }
-            if (!$user['status']) {
-                throw new \InvalidArgumentException('Every user must have one of cs:invite-accepted, cs:invite-declined, cs:invite-noresponse or cs:invite-invalid');
-            }
 
-            $users[] = $user;
+            $href = new \Sabre\DAV\Xml\Property\Href($sharee->href);
+            $href->xmlSerialize($writer);
 
-        }
+            if (isset($sharee->properties['{DAV:}displayname'])) {
+                $writer->writeElement($cs . 'common-name', $sharee->properties['{DAV:}displayname']);
+            }
+            if ($sharee->comment) {
+                $writer->writeElement($cs . 'summary', $sharee->comment);
+            }
+            $writer->endElement(); // organizer or user
 
-        return new self($users);
+        }
 
     }
+
 }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Property/ScheduleCalendarTransp.php b/vendor/sabre/dav/lib/CalDAV/Xml/Property/ScheduleCalendarTransp.php
index 4a253e008..a82b8eff7 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Property/ScheduleCalendarTransp.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Property/ScheduleCalendarTransp.php
@@ -4,8 +4,8 @@ namespace Sabre\CalDAV\Xml\Property;
 
 use Sabre\Xml\Element;
 use Sabre\Xml\Reader;
+use Sabre\Xml\Deserializer;
 use Sabre\Xml\Writer;
-use Sabre\Xml\Element\Elements;
 use Sabre\CalDAV\Plugin;
 
 /**
@@ -116,23 +116,13 @@ class ScheduleCalendarTransp implements Element {
      */
     static function xmlDeserialize(Reader $reader) {
 
-        $elems = Elements::xmlDeserialize($reader);
+        $elems = Deserializer\enum($reader, Plugin::NS_CALDAV);
 
-        $value = null;
-
-        foreach ($elems as $elem) {
-            switch ($elem) {
-                case '{' . Plugin::NS_CALDAV . '}opaque' :
-                    $value = self::OPAQUE;
-                    break;
-                case '{' . Plugin::NS_CALDAV . '}transparent' :
-                    $value = self::TRANSPARENT;
-                    break;
-            }
+        if (in_array('transparent', $elems)) {
+            $value = self::TRANSPARENT;
+        } else {
+            $value = self::OPAQUE;
         }
-        if (is_null($value))
-           return null;
-
         return new self($value);
 
     }
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/InviteReply.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/InviteReply.php
index ec627156f..2ecf6c2bb 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/InviteReply.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/InviteReply.php
@@ -2,12 +2,13 @@
 
 namespace Sabre\CalDAV\Xml\Request;
 
+use Sabre\CalDAV\Plugin;
+use Sabre\CalDAV\SharingPlugin;
+use Sabre\DAV;
+use Sabre\DAV\Exception\BadRequest;
 use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
 use Sabre\Xml\Element\KeyValue;
-use Sabre\DAV\Exception\BadRequest;
-use Sabre\CalDAV\Plugin;
-use Sabre\CalDAV\SharingPlugin;
 
 /**
  * Invite-reply POST request parser
@@ -121,10 +122,10 @@ class InviteReply implements XmlDeserializable {
                     }
                     break;
                 case '{' . Plugin::NS_CALENDARSERVER . '}invite-accepted' :
-                    $status = SharingPlugin::STATUS_ACCEPTED;
+                    $status = DAV\Sharing\Plugin::INVITE_ACCEPTED;
                     break;
                 case '{' . Plugin::NS_CALENDARSERVER . '}invite-declined' :
-                    $status = SharingPlugin::STATUS_DECLINED;
+                    $status = DAV\Sharing\Plugin::INVITE_DECLINED;
                     break;
                 case '{' . Plugin::NS_CALENDARSERVER . '}in-reply-to' :
                     $inReplyTo = $value;
diff --git a/vendor/sabre/dav/lib/CalDAV/Xml/Request/Share.php b/vendor/sabre/dav/lib/CalDAV/Xml/Request/Share.php
index dacc5dc94..b5d9a133c 100644
--- a/vendor/sabre/dav/lib/CalDAV/Xml/Request/Share.php
+++ b/vendor/sabre/dav/lib/CalDAV/Xml/Request/Share.php
@@ -2,9 +2,10 @@
 
 namespace Sabre\CalDAV\Xml\Request;
 
+use Sabre\CalDAV\Plugin;
+use Sabre\DAV\Xml\Element\Sharee;
 use Sabre\Xml\Reader;
 use Sabre\Xml\XmlDeserializable;
-use Sabre\CalDAV\Plugin;
 
 /**
  * Share POST request parser
@@ -20,37 +21,20 @@ use Sabre\CalDAV\Plugin;
 class Share implements XmlDeserializable {
 
     /**
-     * The list of new people added or updated.
-     *
-     * Every element has the following keys:
-     * 1. href - An email address
-     * 2. commonName - Some name
-     * 3. summary - An optional description of the share
-     * 4. readOnly - true or false
-     *
-     * @var array
-     */
-    public $set = [];
-
-    /**
-     * List of people removed from the share list.
-     *
-     * The list is a flat list of email addresses (including mailto:).
+     * The list of new people added or updated or removed from the share.
      *
-     * @var array
+     * @var Sharee[]
      */
-    public $remove = [];
+    public $sharees = [];
 
     /**
      * Constructor
      *
-     * @param array $set
-     * @param array $remove
+     * @param Sharee[] $sharees
      */
-    function __construct(array $set, array $remove) {
+    function __construct(array $sharees) {
 
-        $this->set = $set;
-        $this->remove = $remove;
+        $this->sharees = $sharees;
 
     }
 
@@ -77,13 +61,12 @@ class Share implements XmlDeserializable {
      */
     static function xmlDeserialize(Reader $reader) {
 
-        $elems = $reader->parseInnerTree([
+        $elems = $reader->parseGetElements([
             '{' . Plugin::NS_CALENDARSERVER . '}set'    => 'Sabre\\Xml\\Element\\KeyValue',
             '{' . Plugin::NS_CALENDARSERVER . '}remove' => 'Sabre\\Xml\\Element\\KeyValue',
         ]);
 
-        $set = [];
-        $remove = [];
+        $sharees = [];
 
         foreach ($elems as $elem) {
             switch ($elem['name']) {
@@ -94,22 +77,34 @@ class Share implements XmlDeserializable {
                     $sumElem = '{' . Plugin::NS_CALENDARSERVER . '}summary';
                     $commonName = '{' . Plugin::NS_CALENDARSERVER . '}common-name';
 
-                    $set[] = [
+                    $properties = [];
+                    if (isset($sharee[$commonName])) {
+                        $properties['{DAV:}displayname'] = $sharee[$commonName];
+                    }
+
+                    $access = array_key_exists('{' . Plugin::NS_CALENDARSERVER . '}read-write', $sharee)
+                        ? \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE
+                        : \Sabre\DAV\Sharing\Plugin::ACCESS_READ;
+
+                    $sharees[] = new Sharee([
                         'href'       => $sharee['{DAV:}href'],
-                        'commonName' => isset($sharee[$commonName]) ? $sharee[$commonName] : null,
-                        'summary'    => isset($sharee[$sumElem]) ? $sharee[$sumElem] : null,
-                        'readOnly'   => !array_key_exists('{' . Plugin::NS_CALENDARSERVER . '}read-write', $sharee),
-                    ];
+                        'properties' => $properties,
+                        'access'     => $access,
+                        'comment'    => isset($sharee[$sumElem]) ? $sharee[$sumElem] : null
+                    ]);
                     break;
 
                 case '{' . Plugin::NS_CALENDARSERVER . '}remove' :
-                    $remove[] = $elem['value']['{DAV:}href'];
+                    $sharees[] = new Sharee([
+                        'href'   => $elem['value']['{DAV:}href'],
+                        'access' => \Sabre\DAV\Sharing\Plugin::ACCESS_NOACCESS
+                    ]);
                     break;
 
             }
         }
 
-        return new self($set, $remove);
+        return new self($sharees);
 
     }
 
diff --git a/vendor/sabre/dav/lib/CardDAV/AddressBook.php b/vendor/sabre/dav/lib/CardDAV/AddressBook.php
index 70bec8760..6dd098618 100644
--- a/vendor/sabre/dav/lib/CardDAV/AddressBook.php
+++ b/vendor/sabre/dav/lib/CardDAV/AddressBook.php
@@ -16,6 +16,8 @@ use Sabre\DAVACL;
  */
 class AddressBook extends DAV\Collection implements IAddressBook, DAV\IProperties, DAVACL\IACL, DAV\Sync\ISyncCollection, DAV\IMultiGet {
 
+    use DAVACL\ACLTrait;
+
     /**
      * This is an array with addressbook information
      *
@@ -236,48 +238,6 @@ class AddressBook extends DAV\Collection implements IAddressBook, DAV\IPropertie
 
     }
 
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
-
-    /**
-     * Returns a list of ACE's for this node.
-     *
-     * Each ACE has the following properties:
-     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
-     *     currently the only supported privileges
-     *   * 'principal', a url to the principal who owns the node
-     *   * 'protected' (optional), indicating that this ACE is not allowed to
-     *      be updated.
-     *
-     * @return array
-     */
-    function getACL() {
-
-        return [
-            [
-                'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner(),
-                'protected' => true,
-            ],
-            [
-                'privilege' => '{DAV:}write',
-                'principal' => $this->getOwner(),
-                'protected' => true,
-            ],
-
-        ];
-
-    }
 
     /**
      * This method returns the ACL's for card nodes in this address book.
@@ -290,12 +250,7 @@ class AddressBook extends DAV\Collection implements IAddressBook, DAV\IPropertie
 
         return [
             [
-                'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner(),
-                'protected' => true,
-            ],
-            [
-                'privilege' => '{DAV:}write',
+                'privilege' => '{DAV:}all',
                 'principal' => $this->getOwner(),
                 'protected' => true,
             ],
@@ -303,37 +258,6 @@ class AddressBook extends DAV\Collection implements IAddressBook, DAV\IPropertie
 
     }
 
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new DAV\Exception\MethodNotAllowed('Changing ACL is not yet supported');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
 
     /**
      * This method returns the current sync-token for this collection.
diff --git a/vendor/sabre/dav/lib/CardDAV/AddressBookHome.php b/vendor/sabre/dav/lib/CardDAV/AddressBookHome.php
index ebc251832..888a44a40 100644
--- a/vendor/sabre/dav/lib/CardDAV/AddressBookHome.php
+++ b/vendor/sabre/dav/lib/CardDAV/AddressBookHome.php
@@ -18,6 +18,8 @@ use Sabre\Uri;
  */
 class AddressBookHome extends DAV\Collection implements DAV\IExtendedCollection, DAVACL\IACL {
 
+    use DAVACL\ACLTrait;
+
     /**
      * Principal uri
      *
@@ -186,78 +188,4 @@ class AddressBookHome extends DAV\Collection implements DAV\IExtendedCollection,
 
     }
 
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
-
-    /**
-     * Returns a list of ACE's for this node.
-     *
-     * Each ACE has the following properties:
-     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
-     *     currently the only supported privileges
-     *   * 'principal', a url to the principal who owns the node
-     *   * 'protected' (optional), indicating that this ACE is not allowed to
-     *      be updated.
-     *
-     * @return array
-     */
-    function getACL() {
-
-        return [
-            [
-                'privilege' => '{DAV:}read',
-                'principal' => $this->principalUri,
-                'protected' => true,
-            ],
-            [
-                'privilege' => '{DAV:}write',
-                'principal' => $this->principalUri,
-                'protected' => true,
-            ],
-        ];
-
-    }
-
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new DAV\Exception\MethodNotAllowed('Changing ACL is not yet supported');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Backend/BackendInterface.php b/vendor/sabre/dav/lib/CardDAV/Backend/BackendInterface.php
index b9691b906..54e42b899 100644
--- a/vendor/sabre/dav/lib/CardDAV/Backend/BackendInterface.php
+++ b/vendor/sabre/dav/lib/CardDAV/Backend/BackendInterface.php
@@ -55,12 +55,15 @@ interface BackendInterface {
     function updateAddressBook($addressBookId, \Sabre\DAV\PropPatch $propPatch);
 
     /**
-     * Creates a new address book
+     * Creates a new address book.
+     *
+     * This method should return the id of the new address book. The id can be
+     * in any format, including ints, strings, arrays or objects.
      *
      * @param string $principalUri
      * @param string $url Just the 'basename' of the url.
      * @param array $properties
-     * @return void
+     * @return mixed
      */
     function createAddressBook($principalUri, $url, array $properties);
 
diff --git a/vendor/sabre/dav/lib/CardDAV/Backend/PDO.php b/vendor/sabre/dav/lib/CardDAV/Backend/PDO.php
index 5509ddc02..7c3feff93 100644
--- a/vendor/sabre/dav/lib/CardDAV/Backend/PDO.php
+++ b/vendor/sabre/dav/lib/CardDAV/Backend/PDO.php
@@ -128,7 +128,7 @@ class PDO extends AbstractBackend implements SyncSupport {
                 } else {
                     $query .= ', ';
                 }
-                $query .= ' `' . $key . '` = :' . $key . ' ';
+                $query .= ' ' . $key . ' = :' . $key . ' ';
             }
             $query .= ' WHERE id = :addressbookid';
 
@@ -180,7 +180,9 @@ class PDO extends AbstractBackend implements SyncSupport {
         $query = 'INSERT INTO ' . $this->addressBooksTableName . ' (uri, displayname, description, principaluri, synctoken) VALUES (:uri, :displayname, :description, :principaluri, 1)';
         $stmt = $this->pdo->prepare($query);
         $stmt->execute($values);
-        return $this->pdo->lastInsertId();
+        return $this->pdo->lastInsertId(
+            $this->addressBooksTableName . '_id_seq'
+        );
 
     }
 
@@ -230,6 +232,7 @@ class PDO extends AbstractBackend implements SyncSupport {
         $result = [];
         while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
             $row['etag'] = '"' . $row['etag'] . '"';
+            $row['lastmodified'] = (int)$row['lastmodified'];
             $result[] = $row;
         }
         return $result;
@@ -258,6 +261,7 @@ class PDO extends AbstractBackend implements SyncSupport {
         if (!$result) return false;
 
         $result['etag'] = '"' . $result['etag'] . '"';
+        $result['lastmodified'] = (int)$result['lastmodified'];
         return $result;
 
     }
@@ -286,6 +290,7 @@ class PDO extends AbstractBackend implements SyncSupport {
         $result = [];
         while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
             $row['etag'] = '"' . $row['etag'] . '"';
+            $row['lastmodified'] = (int)$row['lastmodified'];
             $result[] = $row;
         }
         return $result;
diff --git a/vendor/sabre/dav/lib/CardDAV/Card.php b/vendor/sabre/dav/lib/CardDAV/Card.php
index 8da672502..0a040be6b 100644
--- a/vendor/sabre/dav/lib/CardDAV/Card.php
+++ b/vendor/sabre/dav/lib/CardDAV/Card.php
@@ -14,6 +14,8 @@ use Sabre\DAV;
  */
 class Card extends DAV\File implements ICard, DAVACL\IACL {
 
+    use DAVACL\ACLTrait;
+
     /**
      * CardDAV backend
      *
@@ -181,18 +183,6 @@ class Card extends DAV\File implements ICard, DAVACL\IACL {
 
     }
 
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
 
     /**
      * Returns a list of ACE's for this node.
@@ -215,12 +205,7 @@ class Card extends DAV\File implements ICard, DAVACL\IACL {
 
         return [
             [
-                'privilege' => '{DAV:}read',
-                'principal' => $this->addressBookInfo['principaluri'],
-                'protected' => true,
-            ],
-            [
-                'privilege' => '{DAV:}write',
+                'privilege' => '{DAV:}all',
                 'principal' => $this->addressBookInfo['principaluri'],
                 'protected' => true,
             ],
@@ -228,36 +213,4 @@ class Card extends DAV\File implements ICard, DAVACL\IACL {
 
     }
 
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new DAV\Exception\MethodNotAllowed('Changing ACL is not yet supported');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
 }
diff --git a/vendor/sabre/dav/lib/CardDAV/Plugin.php b/vendor/sabre/dav/lib/CardDAV/Plugin.php
index b8bded098..0507df100 100644
--- a/vendor/sabre/dav/lib/CardDAV/Plugin.php
+++ b/vendor/sabre/dav/lib/CardDAV/Plugin.php
@@ -4,7 +4,7 @@ namespace Sabre\CardDAV;
 
 use Sabre\DAV;
 use Sabre\DAV\Exception\ReportNotSupported;
-use Sabre\DAV\Xml\Property\Href;
+use Sabre\DAV\Xml\Property\LocalHref;
 use Sabre\DAVACL;
 use Sabre\HTTP;
 use Sabre\HTTP\RequestInterface;
@@ -156,11 +156,11 @@ class Plugin extends DAV\ServerPlugin {
             $path = $propFind->getPath();
 
             $propFind->handle('{' . self::NS_CARDDAV . '}addressbook-home-set', function() use ($path) {
-                return new Href($this->getAddressBookHomeForPrincipal($path) . '/');
+                return new LocalHref($this->getAddressBookHomeForPrincipal($path) . '/');
             });
 
             if ($this->directories) $propFind->handle('{' . self::NS_CARDDAV . '}directory-gateway', function() {
-                return new Href($this->directories);
+                return new LocalHref($this->directories);
             });
 
         }
@@ -334,12 +334,7 @@ class Plugin extends DAV\ServerPlugin {
             $data = stream_get_contents($data);
         }
 
-        $before = md5($data);
-
-        // Converting the data to unicode, if needed.
-        $data = DAV\StringUtil::ensureUTF8($data);
-
-        if (md5($data) !== $before) $modified = true;
+        $before = $data;
 
         try {
 
@@ -366,11 +361,56 @@ class Plugin extends DAV\ServerPlugin {
             throw new DAV\Exception\UnsupportedMediaType('This collection can only support vcard objects.');
         }
 
-        if (!isset($vobj->UID)) {
-            // No UID in vcards is invalid, but we'll just add it in anyway.
-            $vobj->add('UID', DAV\UUIDUtil::getUUID());
+        $options = VObject\Node::PROFILE_CARDDAV;
+        $prefer = $this->server->getHTTPPrefer();
+
+        if ($prefer['handling'] !== 'strict') {
+            $options |= VObject\Node::REPAIR;
+        }
+
+        $messages = $vobj->validate($options);
+
+        $highestLevel = 0;
+        $warningMessage = null;
+
+        // $messages contains a list of problems with the vcard, along with
+        // their severity.
+        foreach ($messages as $message) {
+
+            if ($message['level'] > $highestLevel) {
+                // Recording the highest reported error level.
+                $highestLevel = $message['level'];
+                $warningMessage = $message['message'];
+            }
+
+            switch ($message['level']) {
+
+                case 1 :
+                    // Level 1 means that there was a problem, but it was repaired.
+                    $modified = true;
+                    break;
+                case 2 :
+                    // Level 2 means a warning, but not critical
+                    break;
+                case 3 :
+                    // Level 3 means a critical error
+                    throw new DAV\Exception\UnsupportedMediaType('Validation error in vCard: ' . $message['message']);
+
+            }
+
+        }
+        if ($warningMessage) {
+            $this->server->httpResponse->setHeader(
+                'X-Sabre-Ew-Gross',
+                'vCard validation warning: ' . $warningMessage
+            );
+
+            // Re-serializing object.
             $data = $vobj->serialize();
-            $modified = true;
+            if (!$modified && strcmp($data, $before) !== 0) {
+                // This ensures that the system does not send an ETag back.
+                $modified = true;
+            }
         }
 
         // Destroy circular references to PHP will GC the object.
@@ -803,33 +843,49 @@ class Plugin extends DAV\ServerPlugin {
     /**
      * Converts a vcard blob to a different version, or jcard.
      *
-     * @param string $data
+     * @param string|resource $data
      * @param string $target
      * @return string
      */
     protected function convertVCard($data, $target) {
 
-        $data = VObject\Reader::read($data);
-        switch ($target) {
-            default :
-            case 'vcard3' :
-                $data = $data->convert(VObject\Document::VCARD30);
-                $newResult = $data->serialize();
-                break;
-            case 'vcard4' :
-                $data = $data->convert(VObject\Document::VCARD40);
-                $newResult = $data->serialize();
-                break;
-            case 'jcard' :
-                $data = $data->convert(VObject\Document::VCARD40);
-                $newResult = json_encode($data->jsonSerialize());
-                break;
-
+        if (is_resource($data)) {
+            $data = stream_get_contents($data);
         }
-        // Destroy circular references to PHP will GC the object.
-        $data->destroy();
+        $input = VObject\Reader::read($data);
+        $output = null;
+        try {
 
-        return $newResult;
+            switch ($target) {
+                default :
+                case 'vcard3' :
+                    if ($input->getDocumentType() === VObject\Document::VCARD30) {
+                        // Do nothing
+                        return $data;
+                    }
+                    $output = $input->convert(VObject\Document::VCARD30);
+                    return $output->serialize();
+                case 'vcard4' :
+                    if ($input->getDocumentType() === VObject\Document::VCARD40) {
+                        // Do nothing
+                        return $data;
+                    }
+                    $output = $input->convert(VObject\Document::VCARD40);
+                    return $output->serialize();
+                case 'jcard' :
+                    $output = $input->convert(VObject\Document::VCARD40);
+                    return json_encode($output);
+
+            }
+
+        } finally {
+
+            // Destroy circular references to PHP will GC the object.
+            $input->destroy();
+            if (!is_null($output)) {
+                $output->destroy();
+            }
+        }
 
     }
 
diff --git a/vendor/sabre/dav/lib/CardDAV/VCFExportPlugin.php b/vendor/sabre/dav/lib/CardDAV/VCFExportPlugin.php
index de8b3bb84..d015589ad 100644
--- a/vendor/sabre/dav/lib/CardDAV/VCFExportPlugin.php
+++ b/vendor/sabre/dav/lib/CardDAV/VCFExportPlugin.php
@@ -70,14 +70,34 @@ class VCFExportPlugin extends DAV\ServerPlugin {
             $aclPlugin->checkPrivileges($path, '{DAV:}read');
         }
 
-        $response->setHeader('Content-Type', 'text/directory');
-        $response->setStatus(200);
-
         $nodes = $this->server->getPropertiesForPath($path, [
             '{' . Plugin::NS_CARDDAV . '}address-data',
         ], 1);
 
-        $response->setBody($this->generateVCF($nodes));
+        $format = 'text/directory';
+
+        $output = null;
+        $filenameExtension = null;
+
+        switch ($format) {
+            case 'text/directory':
+                $output = $this->generateVCF($nodes);
+                $filenameExtension = '.vcf';
+                break;
+        }
+
+        $filename = preg_replace(
+            '/[^a-zA-Z0-9-_ ]/um',
+            '',
+            $node->getName()
+        );
+        $filename .= '-' . date('Y-m-d') . $filenameExtension;
+
+        $response->setHeader('Content-Disposition', 'attachment; filename="' . $filename . '"');
+        $response->setHeader('Content-Type', $format);
+
+        $response->setStatus(200);
+        $response->setBody($output);
 
         // Returning false to break the event chain
         return false;
diff --git a/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractDigest.php b/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractDigest.php
index 0251decc1..85c5f30d5 100644
--- a/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractDigest.php
+++ b/vendor/sabre/dav/lib/DAV/Auth/Backend/AbstractDigest.php
@@ -155,8 +155,14 @@ abstract class AbstractDigest implements BackendInterface {
             $response
         );
         $auth->init();
+
+        $oldStatus = $response->getStatus() ?: 200;
         $auth->requireLogin();
 
+        // Preventing the digest utility from modifying the http status code,
+        // this should be handled by the main plugin.
+        $response->setStatus($oldStatus);
+
     }
 
 }
diff --git a/vendor/sabre/dav/lib/DAV/Auth/Backend/File.php b/vendor/sabre/dav/lib/DAV/Auth/Backend/File.php
index 6756e68df..3a687d747 100644
--- a/vendor/sabre/dav/lib/DAV/Auth/Backend/File.php
+++ b/vendor/sabre/dav/lib/DAV/Auth/Backend/File.php
@@ -25,7 +25,7 @@ class File extends AbstractDigest {
     /**
      * Creates the backend object.
      *
-     * If the filename argument is passed in, it will parse out the specified file fist.
+     * If the filename argument is passed in, it will parse out the specified file first.
      *
      * @param string|null $filename
      */
diff --git a/vendor/sabre/dav/lib/DAV/Auth/Plugin.php b/vendor/sabre/dav/lib/DAV/Auth/Plugin.php
index 818d8a4ad..4b5f35ac3 100644
--- a/vendor/sabre/dav/lib/DAV/Auth/Plugin.php
+++ b/vendor/sabre/dav/lib/DAV/Auth/Plugin.php
@@ -4,7 +4,6 @@ namespace Sabre\DAV\Auth;
 
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
-use Sabre\HTTP\URLUtil;
 use Sabre\DAV\Exception\NotAuthenticated;
 use Sabre\DAV\Server;
 use Sabre\DAV\ServerPlugin;
@@ -26,6 +25,20 @@ use Sabre\DAV\ServerPlugin;
 class Plugin extends ServerPlugin {
 
     /**
+     * By default this plugin will require that the user is authenticated,
+     * and refuse any access if the user is not authenticated.
+     *
+     * If this setting is set to false, we let the user through, whether they
+     * are authenticated or not.
+     *
+     * This is useful if you want to allow both authenticated and
+     * unauthenticated access to your server.
+     *
+     * @param bool
+     */
+    public $autoRequireLogin = true;
+
+    /**
      * authentication backends
      */
     protected $backends;
@@ -108,27 +121,6 @@ class Plugin extends ServerPlugin {
     }
 
     /**
-     * Returns the current username.
-     *
-     * This method is deprecated and is only kept for backwards compatibility
-     * purposes. Please switch to getCurrentPrincipal().
-     *
-     * @deprecated Will be removed in a future version!
-     * @return string|null
-     */
-    function getCurrentUser() {
-
-        // We just do a 'basename' on the principal to give back a sane value
-        // here.
-        list(, $userName) = URLUtil::splitPath(
-            $this->getCurrentPrincipal()
-        );
-
-        return $userName;
-
-    }
-
-    /**
      * This method is called before any HTTP method and forces users to be authenticated
      *
      * @param RequestInterface $request
@@ -154,6 +146,50 @@ class Plugin extends ServerPlugin {
             return;
 
         }
+
+        $authResult = $this->check($request, $response);
+
+        if ($authResult[0]) {
+            // Auth was successful
+            $this->currentPrincipal = $authResult[1];
+            $this->loginFailedReasons = null;
+            return;
+        }
+
+
+
+        // If we got here, it means that no authentication backend was
+        // successful in authenticating the user.
+        $this->currentPrincipal = null;
+        $this->loginFailedReasons = $authResult[1];
+
+        if ($this->autoRequireLogin) {
+            $this->challenge($request, $response);
+            throw new NotAuthenticated(implode(', ', $authResult[1]));
+        }
+
+    }
+
+    /**
+     * Checks authentication credentials, and logs the user in if possible.
+     *
+     * This method returns an array. The first item in the array is a boolean
+     * indicating if login was successful.
+     *
+     * If login was successful, the second item in the array will contain the
+     * current principal url/path of the logged in user.
+     *
+     * If login was not successful, the second item in the array will contain a
+     * an array with strings. The strings are a list of reasons why login was
+     * unsuccesful. For every auth backend there will be one reason, so usually
+     * there's just one.
+     *
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     * @return array
+     */
+    function check(RequestInterface $request, ResponseInterface $response) {
+
         if (!$this->backends) {
             throw new \Sabre\DAV\Exception('No authentication backends were configured on this server.');
         }
@@ -172,20 +208,56 @@ class Plugin extends ServerPlugin {
             if ($result[0]) {
                 $this->currentPrincipal = $result[1];
                 // Exit early
-                return;
+                return [true, $result[1]];
             }
             $reasons[] = $result[1];
 
         }
 
-        // If we got here, it means that no authentication backend was
-        // successful in authenticating the user.
-        $this->currentPrincipal = null;
+        return [false, $reasons];
+
+    }
+
+    /**
+     * This method sends authentication challenges to the user.
+     *
+     * This method will for example cause a HTTP Basic backend to set a
+     * WWW-Authorization header, indicating to the client that it should
+     * authenticate.
+     *
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     * @return array
+     */
+    function challenge(RequestInterface $request, ResponseInterface $response) {
 
         foreach ($this->backends as $backend) {
             $backend->challenge($request, $response);
         }
-        throw new NotAuthenticated(implode(', ', $reasons));
+
+    }
+
+    /**
+     * List of reasons why login failed for the last login operation.
+     *
+     * @var string[]|null
+     */
+    protected $loginFailedReasons;
+
+    /**
+     * Returns a list of reasons why login was unsuccessful.
+     *
+     * This method will return the login failed reasons for the last login
+     * operation. One for each auth backend.
+     *
+     * This method returns null if the last authentication attempt was
+     * successful, or if there was no authentication attempt yet.
+     *
+     * @return string[]|null
+     */
+    function getLoginFailedReasons() {
+
+        return $this->loginFailedReasons;
 
     }
 
diff --git a/vendor/sabre/dav/lib/DAV/Browser/Plugin.php b/vendor/sabre/dav/lib/DAV/Browser/Plugin.php
index 07ca6c3e5..49359a045 100644
--- a/vendor/sabre/dav/lib/DAV/Browser/Plugin.php
+++ b/vendor/sabre/dav/lib/DAV/Browser/Plugin.php
@@ -48,7 +48,7 @@ class Plugin extends DAV\ServerPlugin {
     public $uninterestingProperties = [
         '{DAV:}supportedlock',
         '{DAV:}acl-restrictions',
-        '{DAV:}supported-privilege-set',
+//        '{DAV:}supported-privilege-set',
         '{DAV:}supported-method-set',
     ];
 
@@ -112,7 +112,7 @@ class Plugin extends DAV\ServerPlugin {
         $getVars = $request->getQueryParameters();
 
         // CSP headers
-        $this->server->httpResponse->setHeader('Content-Security-Policy', "img-src 'self'; style-src 'self';");
+        $this->server->httpResponse->setHeader('Content-Security-Policy', "default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';");
 
         $sabreAction = isset($getVars['sabreAction']) ? $getVars['sabreAction'] : null;
 
@@ -354,7 +354,7 @@ class Plugin extends DAV\ServerPlugin {
 
         $output = '';
         if ($this->enablePost) {
-            $this->server->emit('onHTMLActionsPanel', [$node, &$output]);
+            $this->server->emit('onHTMLActionsPanel', [$node, &$output, $path]);
         }
 
         if ($output) {
@@ -368,7 +368,7 @@ class Plugin extends DAV\ServerPlugin {
 
         $html .= $this->generateFooter();
 
-        $this->server->httpResponse->setHeader('Content-Security-Policy', "img-src 'self'; style-src 'self';");
+        $this->server->httpResponse->setHeader('Content-Security-Policy', "default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';");
 
         return $html;
 
@@ -477,7 +477,7 @@ HTML;
 
         $version = DAV\Version::VERSION;
         return <<<HTML
-<footer>Generated by SabreDAV $version (c)2007-2015 <a href="http://sabre.io/">http://sabre.io/</a></footer>
+<footer>Generated by SabreDAV $version (c)2007-2016 <a href="http://sabre.io/">http://sabre.io/</a></footer>
 </body>
 </html>
 HTML;
@@ -493,9 +493,10 @@ HTML;
      *
      * @param DAV\INode $node
      * @param mixed $output
+     * @param string $path
      * @return void
      */
-    function htmlActionsPanel(DAV\INode $node, &$output) {
+    function htmlActionsPanel(DAV\INode $node, &$output, $path) {
 
         if (!$node instanceof DAV\ICollection)
             return;
diff --git a/vendor/sabre/dav/lib/DAV/Browser/assets/sabredav.css b/vendor/sabre/dav/lib/DAV/Browser/assets/sabredav.css
index c9ab2c74f..8869597f0 100644
--- a/vendor/sabre/dav/lib/DAV/Browser/assets/sabredav.css
+++ b/vendor/sabre/dav/lib/DAV/Browser/assets/sabredav.css
@@ -96,12 +96,12 @@ header a {
   vertical-align: middle;
   border: 0;
 }
-input, button {
+input, button, select {
     font: inherit;
     color: inherit;
 }
 
-input[type=text] {
+input[type=text], select {
   border: 1px solid #bbbbbb;
   line-height: 22px;
   padding: 5px 10px;
@@ -200,7 +200,7 @@ section table {
     line-height: 40px;
 }
 
-.actions input[type=text] {
+.actions input[type=text], select {
     width: 450px;
 }
 
diff --git a/vendor/sabre/dav/lib/DAV/Client.php b/vendor/sabre/dav/lib/DAV/Client.php
index d46b397b6..08d5d4702 100644
--- a/vendor/sabre/dav/lib/DAV/Client.php
+++ b/vendor/sabre/dav/lib/DAV/Client.php
@@ -3,6 +3,7 @@
 namespace Sabre\DAV;
 
 use Sabre\HTTP;
+use Sabre\Uri;
 
 /**
  * SabreDAV DAV client
@@ -387,20 +388,10 @@ class Client extends HTTP\Client {
      */
     function getAbsoluteUrl($url) {
 
-        // If the url starts with http:// or https://, the url is already absolute.
-        if (preg_match('/^http(s?):\/\//', $url)) {
-            return $url;
-        }
-
-        // If the url starts with a slash, we must calculate the url based off
-        // the root of the base url.
-        if (strpos($url, '/') === 0) {
-            $parts = parse_url($this->baseUri);
-            return $parts['scheme'] . '://' . $parts['host'] . (isset($parts['port']) ? ':' . $parts['port'] : '') . $url;
-        }
-
-        // Otherwise...
-        return $this->baseUri . $url;
+        return Uri\resolve(
+            $this->baseUri,
+            $url
+        );
 
     }
 
diff --git a/vendor/sabre/dav/lib/DAV/CorePlugin.php b/vendor/sabre/dav/lib/DAV/CorePlugin.php
index 3a70b2a7e..a1b052915 100644
--- a/vendor/sabre/dav/lib/DAV/CorePlugin.php
+++ b/vendor/sabre/dav/lib/DAV/CorePlugin.php
@@ -50,6 +50,8 @@ class CorePlugin extends ServerPlugin {
         $server->on('propFind',         [$this, 'propFindNode'], 120);
         $server->on('propFind',         [$this, 'propFindLate'], 200);
 
+        $server->on('exception',        [$this, 'exception']);
+
     }
 
     /**
@@ -844,10 +846,8 @@ class CorePlugin extends ServerPlugin {
         if ($node instanceof IProperties && $propertyNames = $propFind->get404Properties()) {
 
             $nodeProperties = $node->getProperties($propertyNames);
-            foreach ($propertyNames as $propertyName) {
-                if (array_key_exists($propertyName, $nodeProperties)) {
-                    $propFind->set($propertyName, $nodeProperties[$propertyName], 200);
-                }
+            foreach ($nodeProperties as $propertyName => $propertyValue) {
+                $propFind->set($propertyName, $propertyValue, 200);
             }
 
         }
@@ -905,6 +905,38 @@ class CorePlugin extends ServerPlugin {
     }
 
     /**
+     * Listens for exception events, and automatically logs them.
+     *
+     * @param Exception $e
+     */
+    function exception($e) {
+
+        $logLevel = \Psr\Log\LogLevel::CRITICAL;
+        if ($e instanceof \Sabre\DAV\Exception) {
+            // If it's a standard sabre/dav exception, it means we have a http
+            // status code available.
+            $code = $e->getHTTPCode();
+
+            if ($code >= 400 && $code < 500) {
+                // user error
+                $logLevel = \Psr\Log\LogLevel::INFO;
+            } else {
+                // Server-side error. We mark it's as an error, but it's not
+                // critical.
+                $logLevel = \Psr\Log\LogLevel::ERROR;
+            }
+        }
+
+        $this->server->getLogger()->log(
+            $logLevel,
+            'Uncaught exception',
+            [
+                'exception' => $e,
+            ]
+        );
+    }
+
+    /**
      * Returns a bunch of meta-data about the plugin.
      *
      * Providing this information is optional, and is mainly displayed by the
diff --git a/vendor/sabre/dav/lib/DAV/FS/Directory.php b/vendor/sabre/dav/lib/DAV/FS/Directory.php
index 963e5554c..362f7a411 100644
--- a/vendor/sabre/dav/lib/DAV/FS/Directory.php
+++ b/vendor/sabre/dav/lib/DAV/FS/Directory.php
@@ -140,10 +140,10 @@ class Directory extends Node implements DAV\ICollection, DAV\IQuota {
      * @return array
      */
     function getQuotaInfo() {
-
+        $absolute = realpath($this->path);
         return [
-            disk_total_space($this->path) - disk_free_space($this->path),
-            disk_free_space($this->path)
+            disk_total_space($absolute) - disk_free_space($absolute),
+            disk_free_space($absolute)
         ];
 
     }
diff --git a/vendor/sabre/dav/lib/DAV/FSExt/Directory.php b/vendor/sabre/dav/lib/DAV/FSExt/Directory.php
index 648079e26..dd5f992db 100644
--- a/vendor/sabre/dav/lib/DAV/FSExt/Directory.php
+++ b/vendor/sabre/dav/lib/DAV/FSExt/Directory.php
@@ -131,12 +131,7 @@ class Directory extends Node implements DAV\ICollection, DAV\IQuota, DAV\IMoveTa
 
         foreach ($iterator as $entry) {
 
-            $node = $entry->getFilename();
-
-            if ($node === '.sabredav')
-                continue;
-
-            $nodes[] = $this->getChild($node);
+            $nodes[] = $this->getChild($entry->getFilename());
 
         }
         return $nodes;
@@ -153,9 +148,6 @@ class Directory extends Node implements DAV\ICollection, DAV\IQuota, DAV\IMoveTa
         // Deleting all children
         foreach ($this->getChildren() as $child) $child->delete();
 
-        // Removing resource info, if its still around
-        if (file_exists($this->path . '/.sabredav')) unlink($this->path . '/.sabredav');
-
         // Removing the directory itself
         rmdir($this->path);
 
diff --git a/vendor/sabre/dav/lib/DAV/File.php b/vendor/sabre/dav/lib/DAV/File.php
index e0a0391db..675956b22 100644
--- a/vendor/sabre/dav/lib/DAV/File.php
+++ b/vendor/sabre/dav/lib/DAV/File.php
@@ -15,12 +15,24 @@ namespace Sabre\DAV;
 abstract class File extends Node implements IFile {
 
     /**
-     * Updates the data
+     * Replaces the contents of the file.
      *
-     * data is a readable stream resource.
+     * The data argument is a readable stream resource.
      *
-     * @param resource $data
-     * @return void
+     * After a succesful put operation, you may choose to return an ETag. The
+     * etag must always be surrounded by double-quotes. These quotes must
+     * appear in the actual string you're returning.
+     *
+     * Clients may use the ETag from a PUT request to later on make sure that
+     * when they update the file, the contents haven't changed in the mean
+     * time.
+     *
+     * If you don't plan to store the file byte-by-byte, and you return a
+     * different object on a subsequent GET you are strongly recommended to not
+     * return an ETag, and just return null.
+     *
+     * @param string|resource $data
+     * @return string|null
      */
     function put($data) {
 
diff --git a/vendor/sabre/dav/lib/DAV/ICollection.php b/vendor/sabre/dav/lib/DAV/ICollection.php
index 390d9b741..7793070d3 100644
--- a/vendor/sabre/dav/lib/DAV/ICollection.php
+++ b/vendor/sabre/dav/lib/DAV/ICollection.php
@@ -54,14 +54,14 @@ interface ICollection extends INode {
      * exist.
      *
      * @param string $name
-     * @return DAV\INode
+     * @return INode
      */
     function getChild($name);
 
     /**
      * Returns an array with all the child nodes
      *
-     * @return DAV\INode[]
+     * @return INode[]
      */
     function getChildren();
 
diff --git a/vendor/sabre/dav/lib/DAV/IFile.php b/vendor/sabre/dav/lib/DAV/IFile.php
index e16a3a58a..37e7cd33c 100644
--- a/vendor/sabre/dav/lib/DAV/IFile.php
+++ b/vendor/sabre/dav/lib/DAV/IFile.php
@@ -32,7 +32,7 @@ interface IFile extends INode {
      * different object on a subsequent GET you are strongly recommended to not
      * return an ETag, and just return null.
      *
-     * @param resource $data
+     * @param resource|data $data
      * @return string|null
      */
     function put($data);
diff --git a/vendor/sabre/dav/lib/DAV/INode.php b/vendor/sabre/dav/lib/DAV/INode.php
index b5e6cb9ef..bb884934d 100644
--- a/vendor/sabre/dav/lib/DAV/INode.php
+++ b/vendor/sabre/dav/lib/DAV/INode.php
@@ -36,9 +36,10 @@ interface INode {
     function setName($name);
 
     /**
-     * Returns the last modification time, as a unix timestamp
+     * Returns the last modification time, as a unix timestamp. Return null
+     * if the information is not available.
      *
-     * @return int
+     * @return int|null
      */
     function getLastModified();
 
diff --git a/vendor/sabre/dav/lib/DAV/PropertyStorage/Backend/PDO.php b/vendor/sabre/dav/lib/DAV/PropertyStorage/Backend/PDO.php
index 910e4979d..2fe843884 100644
--- a/vendor/sabre/dav/lib/DAV/PropertyStorage/Backend/PDO.php
+++ b/vendor/sabre/dav/lib/DAV/PropertyStorage/Backend/PDO.php
@@ -88,6 +88,9 @@ class PDO implements BackendInterface {
         $stmt->execute([$path]);
 
         while ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
+            if (gettype($row['value']) === 'resource') {
+                $row['value'] = stream_get_contents($row['value']);
+            }
             switch ($row['valuetype']) {
                 case null :
                 case self::VT_STRING :
@@ -121,7 +124,26 @@ class PDO implements BackendInterface {
 
         $propPatch->handleRemaining(function($properties) use ($path) {
 
-            $updateStmt = $this->pdo->prepare("REPLACE INTO " . $this->tableName . " (path, name, valuetype, value) VALUES (?, ?, ?, ?)");
+
+            if ($this->pdo->getAttribute(\PDO::ATTR_DRIVER_NAME) === 'pgsql') {
+
+                $updateSql = <<<SQL
+INSERT INTO {$this->tableName} (path, name, valuetype, value)
+VALUES (:path, :name, :valuetype, :value)
+ON CONFLICT (path, name)
+DO UPDATE SET valuetype = :valuetype, value = :value
+SQL;
+
+
+            } else {
+                $updateSql = <<<SQL
+REPLACE INTO {$this->tableName} (path, name, valuetype, value)
+VALUES (:path, :name, :valuetype, :value)
+SQL;
+
+            }
+
+            $updateStmt = $this->pdo->prepare($updateSql);
             $deleteStmt = $this->pdo->prepare("DELETE FROM " . $this->tableName . " WHERE path = ? AND name = ?");
 
             foreach ($properties as $name => $value) {
@@ -136,7 +158,14 @@ class PDO implements BackendInterface {
                         $valueType = self::VT_OBJECT;
                         $value = serialize($value);
                     }
-                    $updateStmt->execute([$path, $name, $valueType, $value]);
+
+                    $updateStmt->bindParam('path', $path, \PDO::PARAM_STR);
+                    $updateStmt->bindParam('name', $name, \PDO::PARAM_STR);
+                    $updateStmt->bindParam('valuetype', $valueType, \PDO::PARAM_INT);
+                    $updateStmt->bindParam('value', $value, \PDO::PARAM_LOB);
+
+                    $updateStmt->execute();
+
                 } else {
                     $deleteStmt->execute([$path, $name]);
                 }
diff --git a/vendor/sabre/dav/lib/DAV/Server.php b/vendor/sabre/dav/lib/DAV/Server.php
index b37652812..024b7a557 100644
--- a/vendor/sabre/dav/lib/DAV/Server.php
+++ b/vendor/sabre/dav/lib/DAV/Server.php
@@ -8,6 +8,10 @@ use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 use Sabre\HTTP\URLUtil;
 use Sabre\Uri;
+use Psr\Log\LoggerAwareInterface;
+use Psr\Log\LoggerAwareTrait;
+use Psr\Log\LoggerInterface;
+use Psr\Log\NullLogger;
 
 /**
  * Main DAV server class
@@ -16,7 +20,9 @@ use Sabre\Uri;
  * @author Evert Pot (http://evertpot.com/)
  * @license http://sabre.io/license/ Modified BSD License
  */
-class Server extends EventEmitter {
+class Server extends EventEmitter implements LoggerAwareInterface {
+
+    use LoggerAwareTrait;
 
     /**
      * Infinity is used for some request supporting the HTTP Depth header and indicates that the operation should traverse the entire tree
@@ -431,6 +437,20 @@ class Server extends EventEmitter {
     }
 
     /**
+     * Returns the PSR-3 logger objcet.
+     *
+     * @return LoggerInterface
+     */
+    function getLogger() {
+
+        if (!$this->logger) {
+            $this->logger = new NullLogger();
+        }
+        return $this->logger;
+
+    }
+
+    /**
      * Handles a http request, and execute a method based on its name
      *
      * @param RequestInterface $request
@@ -1177,9 +1197,20 @@ class Server extends EventEmitter {
 
         if (!$success) {
             $result = $mkCol->getResult();
-            // generateMkCol needs the href key to exist.
-            $result['href'] = $uri;
-            return $result;
+
+            $formattedResult = [
+                'href' => $uri,
+            ];
+
+            foreach ($result as $propertyName => $status) {
+
+                if (!isset($formattedResult[$status])) {
+                    $formattedResult[$status] = [];
+                }
+                $formattedResult[$status][$propertyName] = null;
+
+            }
+            return $formattedResult;
         }
 
         $this->tree->markDirty($parentUri);
diff --git a/vendor/sabre/dav/lib/DAV/Sharing/ISharedNode.php b/vendor/sabre/dav/lib/DAV/Sharing/ISharedNode.php
new file mode 100644
index 000000000..034aefbdc
--- /dev/null
+++ b/vendor/sabre/dav/lib/DAV/Sharing/ISharedNode.php
@@ -0,0 +1,69 @@
+<?php
+
+namespace Sabre\DAV\Sharing;
+
+use Sabre\DAV\INode;
+
+/**
+ * This interface represents a resource that has sharing capabilities, either
+ * because it's possible for an owner to share the resource, or because this is
+ * an instance of a shared resource.
+ *
+ * @copyright Copyright (C) fruux GmbH. (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+interface ISharedNode extends INode {
+
+    /**
+     * Returns the 'access level' for the instance of this shared resource.
+     *
+     * The value should be one of the Sabre\DAV\Sharing\Plugin::ACCESS_
+     * constants.
+     *
+     * @return int
+     */
+    function getShareAccess();
+
+    /**
+     * This function must return a URI that uniquely identifies the shared
+     * resource. This URI should be identical across instances, and is
+     * also used in several other XML bodies to connect invites to
+     * resources.
+     *
+     * This may simply be a relative reference to the original shared instance,
+     * but it could also be a urn. As long as it's a valid URI and unique.
+     *
+     * @return string
+     */
+    function getShareResourceUri();
+
+    /**
+     * Updates the list of sharees.
+     *
+     * Every item must be a Sharee object.
+     *
+     * @param \Sabre\DAV\Xml\Element\Sharee[] $sharees
+     * @return void
+     */
+    function updateInvites(array $sharees);
+
+    /**
+     * Returns the list of people whom this resource is shared with.
+     *
+     * Every item in the returned array must be a Sharee object with
+     * at least the following properties set:
+     *
+     * * $href
+     * * $shareAccess
+     * * $inviteStatus
+     *
+     * and optionally:
+     *
+     * * $properties
+     *
+     * @return \Sabre\DAV\Xml\Element\Sharee[]
+     */
+    function getInvites();
+
+}
diff --git a/vendor/sabre/dav/lib/DAV/Sharing/Plugin.php b/vendor/sabre/dav/lib/DAV/Sharing/Plugin.php
new file mode 100644
index 000000000..354d06a56
--- /dev/null
+++ b/vendor/sabre/dav/lib/DAV/Sharing/Plugin.php
@@ -0,0 +1,342 @@
+<?php
+
+namespace Sabre\DAV\Sharing;
+
+use Sabre\DAV\Exception\BadRequest;
+use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAV\INode;
+use Sabre\DAV\PropFind;
+use Sabre\DAV\Server;
+use Sabre\DAV\ServerPlugin;
+use Sabre\DAV\Xml\Property;
+use Sabre\DAV\Xml\Element\Sharee;
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+
+/**
+ * This plugin implements HTTP requests and properties related to:
+ *
+ * draft-pot-webdav-resource-sharing
+ *
+ * This specification allows people to share webdav resources with others.
+ *
+ * @copyright Copyright (C) 2007-2015 fruux GmbH. (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Plugin extends ServerPlugin {
+
+    const ACCESS_NOTSHARED = 0;
+    const ACCESS_SHAREDOWNER = 1;
+    const ACCESS_READ = 2;
+    const ACCESS_READWRITE = 3;
+    const ACCESS_NOACCESS = 4;
+
+    const INVITE_NORESPONSE = 1;
+    const INVITE_ACCEPTED = 2;
+    const INVITE_DECLINED = 3;
+    const INVITE_INVALID = 4;
+
+    /**
+     * Reference to SabreDAV server object.
+     *
+     * @var Sabre\DAV\Server
+     */
+    protected $server;
+
+    /**
+     * This method should return a list of server-features.
+     *
+     * This is for example 'versioning' and is added to the DAV: header
+     * in an OPTIONS response.
+     *
+     * @return array
+     */
+    function getFeatures() {
+
+        return ['resource-sharing'];
+
+    }
+
+    /**
+     * Returns a plugin name.
+     *
+     * Using this name other plugins will be able to access other plugins
+     * using \Sabre\DAV\Server::getPlugin
+     *
+     * @return string
+     */
+    function getPluginName() {
+
+        return 'sharing';
+
+    }
+
+    /**
+     * This initializes the plugin.
+     *
+     * This function is called by Sabre\DAV\Server, after
+     * addPlugin is called.
+     *
+     * This method should set up the required event subscriptions.
+     *
+     * @param Server $server
+     * @return void
+     */
+    function initialize(Server $server) {
+
+        $this->server = $server;
+
+        $server->xml->elementMap['{DAV:}share-resource'] = 'Sabre\\DAV\\Xml\\Request\\ShareResource';
+
+        array_push(
+            $server->protectedProperties,
+            '{DAV:}share-mode'
+        );
+
+        $server->on('method:POST',              [$this, 'httpPost']);
+        $server->on('propFind',                 [$this, 'propFind']);
+        $server->on('getSupportedPrivilegeSet', [$this, 'getSupportedPrivilegeSet']);
+        $server->on('onHTMLActionsPanel',       [$this, 'htmlActionsPanel']);
+        $server->on('onBrowserPostAction',      [$this, 'browserPostAction']);
+
+    }
+
+    /**
+     * Updates the list of sharees on a shared resource.
+     *
+     * The sharees  array is a list of people that are to be added modified
+     * or removed in the list of shares.
+     *
+     * @param string $path
+     * @param Sharee[] $sharees
+     * @return void
+     */
+    function shareResource($path, array $sharees) {
+
+        $node = $this->server->tree->getNodeForPath($path);
+
+        if (!$node instanceof ISharedNode) {
+
+            throw new Forbidden('Sharing is not allowed on this node');
+
+        }
+
+        // Getting ACL info
+        $acl = $this->server->getPlugin('acl');
+
+        // If there's no ACL support, we allow everything
+        if ($acl) {
+            $acl->checkPrivileges($path, '{DAV:}share');
+        }
+
+        foreach ($sharees as $sharee) {
+            // We're going to attempt to get a local principal uri for a share
+            // href by emitting the getPrincipalByUri event.
+            $principal = null;
+            $this->server->emit('getPrincipalByUri', [$sharee->href, &$principal]);
+            $sharee->principal = $principal;
+        }
+        $node->updateInvites($sharees);
+
+    }
+
+    /**
+     * This event is triggered when properties are requested for nodes.
+     *
+     * This allows us to inject any sharings-specific properties.
+     *
+     * @param PropFind $propFind
+     * @param INode $node
+     * @return void
+     */
+    function propFind(PropFind $propFind, INode $node) {
+
+        if ($node instanceof ISharedNode) {
+
+            $propFind->handle('{DAV:}share-access', function() use ($node) {
+
+                return new Property\ShareAccess($node->getShareAccess());
+
+            });
+            $propFind->handle('{DAV:}invite', function() use ($node) {
+
+                return new Property\Invite($node->getInvites());
+
+            });
+            $propFind->handle('{DAV:}share-resource-uri', function() use ($node) {
+
+                return new Property\Href($node->getShareResourceUri());
+
+            });
+
+        }
+
+    }
+
+    /**
+     * We intercept this to handle POST requests on shared resources
+     *
+     * @param RequestInterface $request
+     * @param ResponseInterface $response
+     * @return null|bool
+     */
+    function httpPost(RequestInterface $request, ResponseInterface $response) {
+
+        $path = $request->getPath();
+        $contentType = $request->getHeader('Content-Type');
+
+        // We're only interested in the davsharing content type.
+        if (strpos($contentType, 'application/davsharing+xml') === false) {
+            return;
+        }
+
+        $message = $this->server->xml->parse(
+            $request->getBody(),
+            $request->getUrl(),
+            $documentType
+        );
+
+        switch ($documentType) {
+
+            case '{DAV:}share-resource':
+
+                $this->shareResource($path, $message->sharees);
+                $response->setStatus(200);
+                // Adding this because sending a response body may cause issues,
+                // and I wanted some type of indicator the response was handled.
+                $response->setHeader('X-Sabre-Status', 'everything-went-well');
+
+                // Breaking the event chain
+                return false;
+
+            default :
+                throw new BadRequest('Unexpected document type: ' . $documentType . ' for this Content-Type');
+
+        }
+
+    }
+
+    /**
+     * This method is triggered whenever a subsystem reqeuests the privileges
+     * hat are supported on a particular node.
+     *
+     * We need to add a number of privileges for scheduling purposes.
+     *
+     * @param INode $node
+     * @param array $supportedPrivilegeSet
+     */
+    function getSupportedPrivilegeSet(INode $node, array &$supportedPrivilegeSet) {
+
+        if ($node instanceof ISharedNode) {
+            $supportedPrivilegeSet['{DAV:}share'] = [
+                'abstract'   => false,
+                'aggregates' => [],
+            ];
+        }
+    }
+
+    /**
+     * Returns a bunch of meta-data about the plugin.
+     *
+     * Providing this information is optional, and is mainly displayed by the
+     * Browser plugin.
+     *
+     * The description key in the returned array may contain html and will not
+     * be sanitized.
+     *
+     * @return array
+     */
+    function getPluginInfo() {
+
+        return [
+            'name'        => $this->getPluginName(),
+            'description' => 'This plugin implements WebDAV resource sharing',
+            'link'        => 'https://github.com/evert/webdav-sharing'
+        ];
+
+    }
+
+    /**
+     * This method is used to generate HTML output for the
+     * DAV\Browser\Plugin.
+     *
+     * @param INode $node
+     * @param string $output
+     * @param string $path
+     * @return bool|null
+     */
+    function htmlActionsPanel(INode $node, &$output, $path) {
+
+        if (!$node instanceof ISharedNode) {
+            return;
+        }
+
+        $aclPlugin = $this->server->getPlugin('acl');
+        if ($aclPlugin) {
+            if (!$aclPlugin->checkPrivileges($path, '{DAV:}share', \Sabre\DAVACL\Plugin::R_PARENT, false)) {
+                // Sharing is not permitted, we will not draw this interface.
+                return;
+            }
+        }
+
+        $output .= '<tr><td colspan="2"><form method="post" action="">
+            <h3>Share this resource</h3>
+            <input type="hidden" name="sabreAction" value="share" />
+            <label>Share with (uri):</label> <input type="text" name="href" placeholder="mailto:user@example.org"/><br />
+            <label>Access</label>
+                <select name="access">
+                    <option value="readwrite">Read-write</option>
+                    <option value="read">Read-only</option>
+                    <option value="no-access">Revoke access</option>
+                </select><br />
+             <input type="submit" value="share" />
+            </form>
+            </td></tr>';
+
+    }
+
+    /**
+     * This method is triggered for POST actions generated by the browser
+     * plugin.
+     *
+     * @param string $path
+     * @param string $action
+     * @param array $postVars
+     */
+    function browserPostAction($path, $action, $postVars) {
+
+        if ($action !== 'share') {
+            return;
+        }
+
+        if (empty($postVars['href'])) {
+            throw new BadRequest('The "href" POST parameter is required');
+        }
+        if (empty($postVars['access'])) {
+            throw new BadRequest('The "access" POST parameter is required');
+        }
+
+        $accessMap = [
+            'readwrite' => self::ACCESS_READWRITE,
+            'read'      => self::ACCESS_READ,
+            'no-access' => self::ACCESS_NOACCESS,
+        ];
+
+        if (!isset($accessMap[$postVars['access']])) {
+            throw new BadRequest('The "access" POST must be readwrite, read or no-access');
+        }
+        $sharee = new Sharee([
+            'href'   => $postVars['href'],
+            'access' => $accessMap[$postVars['access']],
+        ]);
+
+        $this->shareResource(
+            $path,
+            [$sharee]
+        );
+        return false;
+
+    }
+
+}
diff --git a/vendor/sabre/dav/lib/DAV/Tree.php b/vendor/sabre/dav/lib/DAV/Tree.php
index 4563f7c72..5d2792503 100644
--- a/vendor/sabre/dav/lib/DAV/Tree.php
+++ b/vendor/sabre/dav/lib/DAV/Tree.php
@@ -229,7 +229,7 @@ class Tree {
         // flushing the entire cache
         $path = trim($path, '/');
         foreach ($this->cache as $nodePath => $node) {
-            if ($nodePath == $path || strpos($nodePath, $path . '/') === 0)
+            if ($path === '' || $nodePath == $path || strpos($nodePath, $path . '/') === 0)
                 unset($this->cache[$nodePath]);
 
         }
diff --git a/vendor/sabre/dav/lib/DAV/Version.php b/vendor/sabre/dav/lib/DAV/Version.php
index f9331943a..2fda85db8 100644
--- a/vendor/sabre/dav/lib/DAV/Version.php
+++ b/vendor/sabre/dav/lib/DAV/Version.php
@@ -14,6 +14,6 @@ class Version {
     /**
      * Full version number
      */
-    const VERSION = '3.1.3';
+    const VERSION = '3.2.0';
 
 }
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Element/Sharee.php b/vendor/sabre/dav/lib/DAV/Xml/Element/Sharee.php
new file mode 100644
index 000000000..dcfd7bd2e
--- /dev/null
+++ b/vendor/sabre/dav/lib/DAV/Xml/Element/Sharee.php
@@ -0,0 +1,199 @@
+<?php
+
+namespace Sabre\DAV\Xml\Element;
+
+use Sabre\DAV\Exception\BadRequest;
+use Sabre\DAV\Sharing\Plugin;
+use Sabre\DAV\Xml\Property\Href;
+use Sabre\DAV\Xml\Property\ShareAccess;
+use Sabre\Xml\Deserializer;
+use Sabre\Xml\Element;
+use Sabre\Xml\Reader;
+use Sabre\Xml\Writer;
+
+/**
+ * This class represents the {DAV:}sharee element.
+ *
+ * @copyright Copyright (C) fruux GmbH. (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Sharee implements Element {
+
+    /**
+     * A URL. Usually a mailto: address, could also be a principal url.
+     * This uniquely identifies the sharee.
+     *
+     * @var string
+     */
+    public $href;
+
+    /**
+     * A local principal path. The server will do its best to locate the
+     * principal uri based on the given uri. If we could find a local matching
+     * principal uri, this property will contain the value.
+     *
+     * @var string|null
+     */
+    public $principal;
+
+    /**
+     * A list of WebDAV properties that describe the sharee. This might for
+     * example contain a {DAV:}displayname with the real name of the user.
+     *
+     * @var array
+     */
+    public $properties = [];
+
+    /**
+     * Share access level. One of the Sabre\DAV\Sharing\Plugin::ACCESS
+     * constants.
+     *
+     * Can be one of:
+     *
+     * ACCESS_READ
+     * ACCESS_READWRITE
+     * ACCESS_SHAREDOWNER
+     * ACCESS_NOACCESS
+     *
+     * depending on context.
+     *
+     * @var int
+     */
+    public $access;
+
+    /**
+     * When a sharee is originally invited to a share, the sharer may add
+     * a comment. This will be placed in this property.
+     *
+     * @var string
+     */
+    public $comment;
+
+    /**
+     * The status of the invite, should be one of the
+     * Sabre\DAV\Sharing\Plugin::INVITE constants.
+     *
+     * @var int
+     */
+    public $inviteStatus;
+
+    /**
+     * Creates the object
+     *
+     * $properties will be used to populate all internal properties.
+     *
+     * @param array $properties
+     */
+    function __construct(array $properties = []) {
+
+        foreach ($properties as $k => $v) {
+
+            if (property_exists($this, $k)) {
+                $this->$k = $v;
+            } else {
+                throw new \InvalidArgumentException('Unknown property: ' . $k);
+            }
+
+        }
+
+    }
+
+    /**
+     * The xmlSerialize method is called during xml writing.
+     *
+     * Use the $writer argument to write its own xml serialization.
+     *
+     * An important note: do _not_ create a parent element. Any element
+     * implementing XmlSerializble should only ever write what's considered
+     * its 'inner xml'.
+     *
+     * The parent of the current element is responsible for writing a
+     * containing element.
+     *
+     * This allows serializers to be re-used for different element names.
+     *
+     * If you are opening new elements, you must also close them again.
+     *
+     * @param Writer $writer
+     * @return void
+     */
+    function xmlSerialize(Writer $writer) {
+
+
+        $writer->write([
+            new Href($this->href),
+            '{DAV:}prop'         => $this->properties,
+            '{DAV:}share-access' => new ShareAccess($this->access),
+        ]);
+        switch ($this->inviteStatus) {
+            case Plugin::INVITE_NORESPONSE :
+                $writer->writeElement('{DAV:}invite-noresponse');
+                break;
+            case Plugin::INVITE_ACCEPTED :
+                $writer->writeElement('{DAV:}invite-accepted');
+                break;
+            case Plugin::INVITE_DECLINED :
+                $writer->writeElement('{DAV:}invite-declined');
+                break;
+            case Plugin::INVITE_INVALID :
+                $writer->writeElement('{DAV:}invite-invalid');
+                break;
+        }
+
+    }
+
+    /**
+     * The deserialize method is called during xml parsing.
+     *
+     * This method is called statictly, this is because in theory this method
+     * may be used as a type of constructor, or factory method.
+     *
+     * Often you want to return an instance of the current class, but you are
+     * free to return other data as well.
+     *
+     * You are responsible for advancing the reader to the next element. Not
+     * doing anything will result in a never-ending loop.
+     *
+     * If you just want to skip parsing for this element altogether, you can
+     * just call $reader->next();
+     *
+     * $reader->parseInnerTree() will parse the entire sub-tree, and advance to
+     * the next element.
+     *
+     * @param Reader $reader
+     * @return mixed
+     */
+    static function xmlDeserialize(Reader $reader) {
+
+        // Temporarily override configuration
+        $reader->pushContext();
+        $reader->elementMap['{DAV:}share-access'] = 'Sabre\DAV\Xml\Property\ShareAccess';
+        $reader->elementMap['{DAV:}prop'] = 'Sabre\Xml\Deserializer\keyValue';
+
+        $elems = Deserializer\keyValue($reader, 'DAV:');
+
+        // Restore previous configuration
+        $reader->popContext();
+
+        $sharee = new self();
+        if (!isset($elems['href'])) {
+            throw new BadRequest('Every {DAV:}sharee must have a {DAV:}href child-element');
+        }
+        $sharee->href = $elems['href'];
+
+        if (isset($elems['prop'])) {
+            $sharee->properties = $elems['prop'];
+        }
+        if (isset($elems['comment'])) {
+            $sharee->comment = $elems['comment'];
+        }
+        if (!isset($elems['share-access'])) {
+            throw new BadRequest('Every {DAV:}sharee must have a {DAV:}share-access child element');
+        }
+        $sharee->access = $elems['share-access']->getValue();
+        return $sharee;
+
+    }
+
+}
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/Href.php b/vendor/sabre/dav/lib/DAV/Xml/Property/Href.php
index 538e98d0f..0027f72e1 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Property/Href.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/Href.php
@@ -7,6 +7,7 @@ use Sabre\DAV\Browser\HtmlOutputHelper;
 use Sabre\Xml\Element;
 use Sabre\Xml\Reader;
 use Sabre\Xml\Writer;
+use Sabre\Uri;
 
 /**
  * Href property
@@ -32,13 +33,6 @@ class Href implements Element, HtmlOutput {
     protected $hrefs;
 
     /**
-     * Automatically prefix the url with the server base directory
-     *
-     * @var bool
-     */
-    protected $autoPrefix = true;
-
-    /**
      * Constructor
      *
      * You must either pass a string for a single href, or an array of hrefs.
@@ -47,16 +41,13 @@ class Href implements Element, HtmlOutput {
      * and not relative to the servers base uri.
      *
      * @param string|string[] $href
-     * @param bool $autoPrefix
      */
-    function __construct($hrefs, $autoPrefix = true) {
+    function __construct($hrefs) {
 
         if (is_string($hrefs)) {
             $hrefs = [$hrefs];
         }
         $this->hrefs = $hrefs;
-        $this->autoPrefix = $autoPrefix;
-
 
     }
 
@@ -104,9 +95,7 @@ class Href implements Element, HtmlOutput {
     function xmlSerialize(Writer $writer) {
 
         foreach ($this->getHrefs() as $href) {
-            if ($this->autoPrefix) {
-                $href = $writer->contextUri . \Sabre\HTTP\encodePath($href);
-            }
+            $href = Uri\resolve($writer->contextUri, $href);
             $writer->writeElement('{DAV:}href', $href);
         }
 
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/Invite.php b/vendor/sabre/dav/lib/DAV/Xml/Property/Invite.php
new file mode 100644
index 000000000..0616ff113
--- /dev/null
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/Invite.php
@@ -0,0 +1,70 @@
+<?php
+
+namespace Sabre\DAV\Xml\Property;
+
+use Sabre\DAV\Sharing\Sharee;
+use Sabre\Xml\XmlSerializable;
+use Sabre\Xml\Writer;
+
+/**
+ * This class represents the {DAV:}invite property.
+ *
+ * This property is defined here:
+ * https://tools.ietf.org/html/draft-pot-webdav-resource-sharing-03#section-4.4.2
+ *
+ * This property is used by clients to determine who currently has access to
+ * a shared resource, what their access level is and what their invite status
+ * is.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Invite implements XmlSerializable {
+
+    /**
+     * A list of sharees
+     *
+     * @var Sharee[]
+     */
+    public $sharees = [];
+
+    /**
+     * Creates the property.
+     *
+     * @param Sharee[] $sharees
+     */
+    function __construct(array $sharees) {
+
+        $this->sharees = $sharees;
+
+    }
+
+    /**
+     * The xmlSerialize method is called during xml writing.
+     *
+     * Use the $writer argument to write its own xml serialization.
+     *
+     * An important note: do _not_ create a parent element. Any element
+     * implementing XmlSerializble should only ever write what's considered
+     * its 'inner xml'.
+     *
+     * The parent of the current element is responsible for writing a
+     * containing element.
+     *
+     * This allows serializers to be re-used for different element names.
+     *
+     * If you are opening new elements, you must also close them again.
+     *
+     * @param Writer $writer
+     * @return void
+     */
+    function xmlSerialize(Writer $writer) {
+
+        foreach ($this->sharees as $sharee) {
+            $writer->writeElement('{DAV:}sharee', $sharee);
+        }
+
+    }
+
+}
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/LocalHref.php b/vendor/sabre/dav/lib/DAV/Xml/Property/LocalHref.php
new file mode 100644
index 000000000..76a27b95d
--- /dev/null
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/LocalHref.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace Sabre\DAV\Xml\Property;
+
+use Sabre\HTTP;
+
+/**
+ * LocalHref property
+ *
+ * Like the Href property, this element represents {DAV:}href. The difference
+ * is that this is used stricly for paths on the server. The LocalHref property
+ * will prepare the path so it's a valid URI.
+ *
+ * These two objects behave identically:
+ *    new LocalHref($path)
+ *    new Href(\Sabre\HTTP\encodePath($path))
+ *
+ * LocalPath basically ensures that your spaces are %20, and everything that
+ * needs to be is uri encoded.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class LocalHref extends Href {
+
+    /**
+     * Constructor
+     *
+     * You must either pass a string for a single href, or an array of hrefs.
+     *
+     * If auto-prefix is set to false, the hrefs will be treated as absolute
+     * and not relative to the servers base uri.
+     *
+     * @param string|string[] $href
+     */
+    function __construct($hrefs) {
+
+        parent::__construct(array_map(
+            function($href) {
+                return \Sabre\HTTP\encodePath($href);
+            },
+            (array)$hrefs
+        ));
+
+    }
+
+}
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/ShareAccess.php b/vendor/sabre/dav/lib/DAV/Xml/Property/ShareAccess.php
new file mode 100644
index 000000000..a3fc6b0e1
--- /dev/null
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/ShareAccess.php
@@ -0,0 +1,143 @@
+<?php
+
+namespace Sabre\DAV\Xml\Property;
+
+use Sabre\DAV\Sharing\Plugin as SharingPlugin;
+use Sabre\DAV\Exception\BadRequest;
+use Sabre\Xml\Element;
+use Sabre\Xml\Reader;
+use Sabre\Xml\Writer;
+
+/**
+ * This class represents the {DAV:}share-access property.
+ *
+ * This property is defined here:
+ * https://tools.ietf.org/html/draft-pot-webdav-resource-sharing-03#section-4.4.1
+ *
+ * This property is used to indicate if a resource is a shared resource, and
+ * whether the instance of the shared resource is the original instance, or
+ * an instance belonging to a sharee.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class ShareAccess implements Element {
+
+    /**
+     * Either SHARED or SHAREDOWNER
+     *
+     * @var int
+     */
+    protected $value;
+
+    /**
+     * Creates the property.
+     *
+     * The constructor value must be one of the
+     * \Sabre\DAV\Sharing\Plugin::ACCESS_ constants.
+     *
+     * @param int $shareAccess
+     */
+    function __construct($shareAccess) {
+
+        $this->value = $shareAccess;
+
+    }
+
+    /**
+     * Returns the current value.
+     *
+     * @return int
+     */
+    function getValue() {
+
+        return $this->value;
+
+    }
+
+    /**
+     * The xmlSerialize method is called during xml writing.
+     *
+     * Use the $writer argument to write its own xml serialization.
+     *
+     * An important note: do _not_ create a parent element. Any element
+     * implementing XmlSerializble should only ever write what's considered
+     * its 'inner xml'.
+     *
+     * The parent of the current element is responsible for writing a
+     * containing element.
+     *
+     * This allows serializers to be re-used for different element names.
+     *
+     * If you are opening new elements, you must also close them again.
+     *
+     * @param Writer $writer
+     * @return void
+     */
+    function xmlSerialize(Writer $writer) {
+
+        switch ($this->value) {
+
+            case SharingPlugin::ACCESS_NOTSHARED :
+                $writer->writeElement('{DAV:}not-shared');
+                break;
+            case SharingPlugin::ACCESS_SHAREDOWNER :
+                $writer->writeElement('{DAV:}shared-owner');
+                break;
+            case SharingPlugin::ACCESS_READ :
+                $writer->writeElement('{DAV:}read');
+                break;
+            case SharingPlugin::ACCESS_READWRITE :
+                $writer->writeElement('{DAV:}read-write');
+                break;
+            case SharingPlugin::ACCESS_NOACCESS :
+                $writer->writeElement('{DAV:}no-access');
+                break;
+
+        }
+
+    }
+
+    /**
+     * The deserialize method is called during xml parsing.
+     *
+     * This method is called statictly, this is because in theory this method
+     * may be used as a type of constructor, or factory method.
+     *
+     * Often you want to return an instance of the current class, but you are
+     * free to return other data as well.
+     *
+     * You are responsible for advancing the reader to the next element. Not
+     * doing anything will result in a never-ending loop.
+     *
+     * If you just want to skip parsing for this element altogether, you can
+     * just call $reader->next();
+     *
+     * $reader->parseInnerTree() will parse the entire sub-tree, and advance to
+     * the next element.
+     *
+     * @param Reader $reader
+     * @return mixed
+     */
+    static function xmlDeserialize(Reader $reader) {
+
+        $elems = $reader->parseInnerTree();
+        foreach ($elems as $elem) {
+            switch ($elem['name']) {
+                case '{DAV:}not-shared' :
+                    return new self(SharingPlugin::ACCESS_NOTSHARED);
+                case '{DAV:}shared-owner' :
+                    return new self(SharingPlugin::ACCESS_SHAREDOWNER);
+                case '{DAV:}read' :
+                    return new self(SharingPlugin::ACCESS_READ);
+                case '{DAV:}read-write' :
+                    return new self(SharingPlugin::ACCESS_READWRITE);
+                case '{DAV:}no-access' :
+                    return new self(SharingPlugin::ACCESS_NOACCESS);
+            }
+        }
+        throw new BadRequest('Invalid value for {DAV:}share-access element');
+
+    }
+}
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedMethodSet.php b/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedMethodSet.php
index 56b418db6..7641f3739 100644
--- a/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedMethodSet.php
+++ b/vendor/sabre/dav/lib/DAV/Xml/Property/SupportedMethodSet.php
@@ -32,16 +32,11 @@ class SupportedMethodSet implements XmlSerializable, HtmlOutput {
     /**
      * Creates the property
      *
-     * Any reports passed in the constructor
-     * should be valid report-types in clark-notation.
-     *
-     * Either a string or an array of strings must be passed.
-     *
-     * @param string|string[] $methods
+     * @param string[] $methods
      */
-    function __construct($methods = null) {
+    function __construct(array $methods) {
 
-        $this->methods = (array)$methods;
+        $this->methods = $methods;
 
     }
 
diff --git a/vendor/sabre/dav/lib/DAV/Xml/Request/ShareResource.php b/vendor/sabre/dav/lib/DAV/Xml/Request/ShareResource.php
new file mode 100644
index 000000000..965e5857c
--- /dev/null
+++ b/vendor/sabre/dav/lib/DAV/Xml/Request/ShareResource.php
@@ -0,0 +1,81 @@
+<?php
+
+namespace Sabre\DAV\Xml\Request;
+
+use Sabre\Xml\Reader;
+use Sabre\Xml\XmlDeserializable;
+use Sabre\DAV\Xml\Element\Sharee;
+
+/**
+ * ShareResource request parser.
+ *
+ * This class parses the {DAV:}share-resource POST request as defined in:
+ *
+ * https://tools.ietf.org/html/draft-pot-webdav-resource-sharing-01#section-5.3.2.1
+ *
+ * @copyright Copyright (C) 2007-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://www.rooftopsolutions.nl/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class ShareResource implements XmlDeserializable {
+
+    /**
+     * The list of new people added or updated or removed from the share.
+     *
+     * @var Sharee[]
+     */
+    public $sharees = [];
+
+    /**
+     * Constructor
+     *
+     * @param Sharee[] $sharees
+     */
+    function __construct(array $sharees) {
+
+        $this->sharees = $sharees;
+
+    }
+
+    /**
+     * The deserialize method is called during xml parsing.
+     *
+     * This method is called statictly, this is because in theory this method
+     * may be used as a type of constructor, or factory method.
+     *
+     * Often you want to return an instance of the current class, but you are
+     * free to return other data as well.
+     *
+     * You are responsible for advancing the reader to the next element. Not
+     * doing anything will result in a never-ending loop.
+     *
+     * If you just want to skip parsing for this element altogether, you can
+     * just call $reader->next();
+     *
+     * $reader->parseInnerTree() will parse the entire sub-tree, and advance to
+     * the next element.
+     *
+     * @param Reader $reader
+     * @return mixed
+     */
+    static function xmlDeserialize(Reader $reader) {
+
+        $elems = $reader->parseInnerTree([
+            '{DAV:}sharee'       => 'Sabre\DAV\Xml\Element\Sharee',
+            '{DAV:}share-access' => 'Sabre\DAV\Xml\Property\ShareAccess',
+            '{DAV:}prop'         => 'Sabre\Xml\Deserializer\keyValue',
+        ]);
+
+        $sharees = [];
+
+        foreach ($elems as $elem) {
+            if ($elem['name'] !== '{DAV:}sharee') continue;
+            $sharees[] = $elem['value'];
+
+        }
+
+        return new self($sharees);
+
+    }
+
+}
diff --git a/vendor/sabre/dav/lib/DAVACL/ACLTrait.php b/vendor/sabre/dav/lib/DAVACL/ACLTrait.php
new file mode 100644
index 000000000..602654a2e
--- /dev/null
+++ b/vendor/sabre/dav/lib/DAVACL/ACLTrait.php
@@ -0,0 +1,100 @@
+<?php
+
+namespace Sabre\DAVACL;
+
+/**
+ * This trait is a default implementation of the IACL interface.
+ *
+ * In many cases you only want to implement 1 or to of the IACL functions,
+ * this trait allows you to be a bit lazier.
+ *
+ * By default this trait grants all privileges to the owner of the resource.
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (https://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+trait ACLTrait {
+
+    /**
+     * Returns the owner principal
+     *
+     * This must be a url to a principal, or null if there's no owner
+     *
+     * @return string|null
+     */
+    function getOwner() {
+
+        return null;
+
+    }
+
+    /**
+     * Returns a group principal
+     *
+     * This must be a url to a principal, or null if there's no owner
+     *
+     * @return string|null
+     */
+    function getGroup() {
+
+        return null;
+
+    }
+
+    /**
+     * Returns a list of ACE's for this node.
+     *
+     * Each ACE has the following properties:
+     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
+     *     currently the only supported privileges
+     *   * 'principal', a url to the principal who owns the node
+     *   * 'protected' (optional), indicating that this ACE is not allowed to
+     *      be updated.
+     *
+     * @return array
+     */
+    function getACL() {
+
+        return [
+            [
+                'privilege' => '{DAV:}all',
+                'principal' => '{DAV:}owner',
+                'protected' => true,
+            ]
+        ];
+
+    }
+
+    /**
+     * Updates the ACL
+     *
+     * This method will receive a list of new ACE's as an array argument.
+     *
+     * @param array $acl
+     * @return void
+     */
+    function setACL(array $acl) {
+
+        throw new \Sabre\DAV\Exception\Forbidden('Setting ACL is not supported on this node');
+    }
+
+    /**
+     * Returns the list of supported privileges for this node.
+     *
+     * The returned data structure is a list of nested privileges.
+     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
+     * standard structure.
+     *
+     * If null is returned from this method, the default privilege set is used,
+     * which is fine for most common usecases.
+     *
+     * @return array|null
+     */
+    function getSupportedPrivilegeSet() {
+
+        return null;
+
+    }
+
+}
diff --git a/vendor/sabre/dav/lib/DAVACL/AbstractPrincipalCollection.php b/vendor/sabre/dav/lib/DAVACL/AbstractPrincipalCollection.php
index 460f78981..9d2026380 100644
--- a/vendor/sabre/dav/lib/DAVACL/AbstractPrincipalCollection.php
+++ b/vendor/sabre/dav/lib/DAVACL/AbstractPrincipalCollection.php
@@ -110,7 +110,7 @@ abstract class AbstractPrincipalCollection extends DAV\Collection implements IPr
      *
      * @param string $name
      * @throws DAV\Exception\NotFound
-     * @return IPrincipal
+     * @return DAV\INode
      */
     function getChild($name) {
 
diff --git a/vendor/sabre/dav/lib/DAVACL/FS/Collection.php b/vendor/sabre/dav/lib/DAVACL/FS/Collection.php
index 5fab4768c..1c08b43b1 100644
--- a/vendor/sabre/dav/lib/DAVACL/FS/Collection.php
+++ b/vendor/sabre/dav/lib/DAVACL/FS/Collection.php
@@ -3,6 +3,7 @@
 namespace Sabre\DAVACL\FS;
 
 use Sabre\DAV\FSExt\Directory as BaseCollection;
+use Sabre\DAVACL\ACLTrait;
 use Sabre\DAVACL\IACL;
 use Sabre\DAV\Exception\Forbidden;
 use Sabre\DAV\Exception\NotFound;
@@ -16,6 +17,8 @@ use Sabre\DAV\Exception\NotFound;
  */
 class Collection extends BaseCollection implements IACL {
 
+    use ACLTrait;
+
     /**
      * A list of ACL rules.
      *
@@ -52,8 +55,8 @@ class Collection extends BaseCollection implements IACL {
      * exist.
      *
      * @param string $name
-     * @throws DAV\Exception\NotFound
-     * @return DAV\INode
+     * @throws NotFound
+     * @return \Sabre\DAV\INode
      */
     function getChild($name) {
 
@@ -88,19 +91,6 @@ class Collection extends BaseCollection implements IACL {
     }
 
     /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
-
-    /**
      * Returns a list of ACE's for this node.
      *
      * Each ACE has the following properties:
@@ -118,36 +108,4 @@ class Collection extends BaseCollection implements IACL {
 
     }
 
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's as an array argument.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new Forbidden('Setting ACL is not allowed here');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/FS/File.php b/vendor/sabre/dav/lib/DAVACL/FS/File.php
index 0d549528b..387597bf7 100644
--- a/vendor/sabre/dav/lib/DAVACL/FS/File.php
+++ b/vendor/sabre/dav/lib/DAVACL/FS/File.php
@@ -4,7 +4,7 @@ namespace Sabre\DAVACL\FS;
 
 use Sabre\DAV\FSExt\File as BaseFile;
 use Sabre\DAVACL\IACL;
-use Sabre\DAV\Exception\Forbidden;
+use Sabre\DAVACL\ACLTrait;
 
 /**
  * This is an ACL-enabled file node.
@@ -15,6 +15,8 @@ use Sabre\DAV\Exception\Forbidden;
  */
 class File extends BaseFile implements IACL {
 
+    use ACLTrait;
+
     /**
      * A list of ACL rules.
      *
@@ -58,19 +60,6 @@ class File extends BaseFile implements IACL {
     }
 
     /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
-
-    /**
      * Returns a list of ACE's for this node.
      *
      * Each ACE has the following properties:
@@ -88,36 +77,4 @@ class File extends BaseFile implements IACL {
 
     }
 
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's as an array argument.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new Forbidden('Setting ACL is not allowed here');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/FS/HomeCollection.php b/vendor/sabre/dav/lib/DAVACL/FS/HomeCollection.php
index c27616770..9e21353ea 100644
--- a/vendor/sabre/dav/lib/DAVACL/FS/HomeCollection.php
+++ b/vendor/sabre/dav/lib/DAVACL/FS/HomeCollection.php
@@ -2,8 +2,8 @@
 
 namespace Sabre\DAVACL\FS;
 
-use Sabre\DAV\Exception\Forbidden;
 use Sabre\DAVACL\AbstractPrincipalCollection;
+use Sabre\DAVACL\ACLTrait;
 use Sabre\DAVACL\IACL;
 use Sabre\DAVACL\PrincipalBackend\BackendInterface;
 use Sabre\Uri;
@@ -21,6 +21,8 @@ use Sabre\Uri;
  */
 class HomeCollection extends AbstractPrincipalCollection implements IACL {
 
+    use ACLTrait;
+
     /**
      * Name of this collection.
      *
@@ -70,20 +72,15 @@ class HomeCollection extends AbstractPrincipalCollection implements IACL {
      * supplied by the authentication backend.
      *
      * @param array $principalInfo
-     * @return void
+     * @return \Sabre\DAVACL\INode
      */
     function getChildForPrincipal(array $principalInfo) {
 
         $owner = $principalInfo['uri'];
         $acl = [
             [
-                'privilege' => '{DAV:}read',
-                'principal' => $owner,
-                'protected' => true,
-            ],
-            [
-                'privilege' => '{DAV:}write',
-                'principal' => $owner,
+                'privilege' => '{DAV:}all',
+                'principal' => '{DAV:}owner',
                 'protected' => true,
             ],
         ];
@@ -103,31 +100,6 @@ class HomeCollection extends AbstractPrincipalCollection implements IACL {
 
     }
 
-    /**
-     * Returns the owner principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getOwner() {
-
-        return null;
-
-    }
-
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
 
     /**
      * Returns a list of ACE's for this node.
@@ -153,36 +125,4 @@ class HomeCollection extends AbstractPrincipalCollection implements IACL {
 
     }
 
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's as an array argument.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new Forbidden('Setting ACL is not allowed here');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/IACL.php b/vendor/sabre/dav/lib/DAVACL/IACL.php
index 81908d08f..f7a138665 100644
--- a/vendor/sabre/dav/lib/DAVACL/IACL.php
+++ b/vendor/sabre/dav/lib/DAVACL/IACL.php
@@ -71,5 +71,4 @@ interface IACL extends DAV\INode {
      */
     function getSupportedPrivilegeSet();
 
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Plugin.php b/vendor/sabre/dav/lib/DAVACL/Plugin.php
index 601dffecc..8e912309e 100644
--- a/vendor/sabre/dav/lib/DAVACL/Plugin.php
+++ b/vendor/sabre/dav/lib/DAVACL/Plugin.php
@@ -4,7 +4,11 @@ namespace Sabre\DAVACL;
 
 use Sabre\DAV;
 use Sabre\DAV\INode;
+use Sabre\DAV\Xml\Property\Href;
 use Sabre\DAV\Exception\BadRequest;
+use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\Exception\NotAuthenticated;
+use Sabre\DAVACL\Exception\NeedPrivileges;
 use Sabre\HTTP\RequestInterface;
 use Sabre\HTTP\ResponseInterface;
 use Sabre\Uri;
@@ -64,18 +68,6 @@ class Plugin extends DAV\ServerPlugin {
     ];
 
     /**
-     * By default ACL is only enforced for nodes that have ACL support (the
-     * ones that implement IACL). For any other node, access is
-     * always granted.
-     *
-     * To override this behaviour you can turn this setting off. This is useful
-     * if you plan to fully support ACL in the entire tree.
-     *
-     * @var bool
-     */
-    public $allowAccessToNodesWithoutACL = true;
-
-    /**
      * By default nodes that are inaccessible by the user, can still be seen
      * in directory listings (PROPFIND on parent with Depth: 1)
      *
@@ -109,6 +101,18 @@ class Plugin extends DAV\ServerPlugin {
     public $adminPrincipals = [];
 
     /**
+     * The ACL plugin allows privileges to be assigned to users that are not
+     * logged in. To facilitate that, it modifies the auth plugin's behavior
+     * to only require login when a privileged operation was denied.
+     *
+     * Unauthenticated access can be considered a security concern, so it's
+     * possible to turn this feature off to harden the server's security.
+     *
+     * @var bool
+     */
+    public $allowUnauthenticatedAccess = true;
+
+    /**
      * Returns a list of features added by this plugin.
      *
      * This list is used in the response of a HTTP OPTIONS request.
@@ -161,6 +165,7 @@ class Plugin extends DAV\ServerPlugin {
 
         return [
             '{DAV:}expand-property',
+            '{DAV:}principal-match',
             '{DAV:}principal-property-search',
             '{DAV:}principal-search-property-set',
         ];
@@ -179,7 +184,8 @@ class Plugin extends DAV\ServerPlugin {
      * @param array|string $privileges
      * @param int $recursion
      * @param bool $throwExceptions if set to false, this method won't throw exceptions.
-     * @throws Sabre\DAVACL\Exception\NeedPrivileges
+     * @throws NeedPrivileges
+     * @throws NotAuthenticated
      * @return bool
      */
     function checkPrivileges($uri, $privileges, $recursion = self::R_PARENT, $throwExceptions = true) {
@@ -188,18 +194,6 @@ class Plugin extends DAV\ServerPlugin {
 
         $acl = $this->getCurrentUserPrivilegeSet($uri);
 
-        if (is_null($acl)) {
-            if ($this->allowAccessToNodesWithoutACL) {
-                return true;
-            } else {
-                if ($throwExceptions)
-                    throw new Exception\NeedPrivileges($uri, $privileges);
-                else
-                    return false;
-
-            }
-        }
-
         $failed = [];
         foreach ($privileges as $priv) {
 
@@ -210,10 +204,22 @@ class Plugin extends DAV\ServerPlugin {
         }
 
         if ($failed) {
-            if ($throwExceptions)
-                throw new Exception\NeedPrivileges($uri, $failed);
-            else
+            if ($this->allowUnauthenticatedAccess && is_null($this->getCurrentUserPrincipal())) {
+                // We are not authenticated. Kicking in the Auth plugin.
+                $authPlugin = $this->server->getPlugin('auth');
+                $reasons = $authPlugin->getLoginFailedReasons();
+                $authPlugin->challenge(
+                    $this->server->httpRequest,
+                    $this->server->httpResponse
+                );
+                throw new notAuthenticated(implode(', ', $reasons) . '. Login was needed for privilege: ' . implode(', ', $failed) . ' on ' . $uri);
+            }
+            if ($throwExceptions) {
+
+                throw new NeedPrivileges($uri, $failed);
+            } else {
                 return false;
+            }
         }
         return true;
 
@@ -229,10 +235,11 @@ class Plugin extends DAV\ServerPlugin {
      */
     function getCurrentUserPrincipal() {
 
-        $authPlugin = $this->server->getPlugin('auth');
-        if (is_null($authPlugin)) return null;
         /** @var $authPlugin Sabre\DAV\Auth\Plugin */
-
+        $authPlugin = $this->server->getPlugin('auth');
+        if (!$authPlugin) {
+            return null;
+        }
         return $authPlugin->getCurrentPrincipal();
 
     }
@@ -258,6 +265,51 @@ class Plugin extends DAV\ServerPlugin {
     }
 
     /**
+     * Sets the default ACL rules.
+     *
+     * These rules are used for all nodes that don't implement the IACL interface.
+     *
+     * @param array $acl
+     * @return void
+     */
+    function setDefaultAcl(array $acl) {
+
+        $this->defaultAcl = $acl;
+
+    }
+
+    /**
+     * Returns the default ACL rules.
+     *
+     * These rules are used for all nodes that don't implement the IACL interface.
+     *
+     * @param array $acl
+     * @return void
+     */
+    function getDefaultAcl() {
+
+        return $this->defaultAcl;
+
+    }
+
+    /**
+     * The default ACL rules.
+     *
+     * These rules are used for nodes that don't implement IACL. These default
+     * set of rules allow anyone to do anything, as long as they are
+     * authenticated.
+     *
+     * var array
+     */
+    protected $defaultAcl = [
+        [
+            'principal' => '{DAV:}authenticated',
+            'protected' => true,
+            'privilege' => '{DAV:}all',
+        ],
+    ];
+
+    /**
      * This array holds a cache for all the principals that are associated with
      * a single principal.
      *
@@ -311,13 +363,77 @@ class Plugin extends DAV\ServerPlugin {
     }
 
     /**
-     * Returns the supported privilege structure for this ACL plugin.
+     * Find out of a principal equals another principal.
+     *
+     * This is a quick way to find out wether a principal URI is part of a
+     * group, or any subgroups.
      *
-     * See RFC3744 for more details. Currently we default on a simple,
-     * standard structure.
+     * The first argument is the principal URI you want to check against. For
+     * example the principal group, and the second argument is the principal of
+     * which you want to find out of it is the same as the first principal, or
+     * in a member of the first principal's group or subgroups.
      *
-     * You can either get the list of privileges by a uri (path) or by
-     * specifying a Node.
+     * So the arguments are not interchangable. If principal A is in group B,
+     * passing 'B', 'A' will yield true, but 'A', 'B' is false.
+     *
+     * If the sceond argument is not passed, we will use the current user
+     * principal.
+     *
+     * @param string $checkPrincipal
+     * @param string $currentPrincipal
+     * @return bool
+     */
+    function principalMatchesPrincipal($checkPrincipal, $currentPrincipal = null) {
+
+        if (is_null($currentPrincipal)) {
+            $currentPrincipal = $this->getCurrentUserPrincipal();
+        }
+        if ($currentPrincipal === $checkPrincipal) {
+            return true;
+        }
+        return in_array(
+            $checkPrincipal,
+            $this->getPrincipalMembership($currentPrincipal)
+        );
+
+    }
+
+
+    /**
+     * Returns a tree of supported privileges for a resource.
+     *
+     * The returned array structure should be in this form:
+     *
+     * [
+     *    [
+     *       'privilege' => '{DAV:}read',
+     *       'abstract'  => false,
+     *       'aggregates' => []
+     *    ]
+     * ]
+     *
+     * Privileges can be nested using "aggregrates". Doing so means that
+     * if you assign someone the aggregrating privilege, all the
+     * sub-privileges will automatically be granted.
+     *
+     * Marking a privilege as abstract means that the privilege cannot be
+     * directly assigned, but must be assigned via the parent privilege.
+     *
+     * So a more complex version might look like this:
+     *
+     * [
+     *    [
+     *       'privilege' => '{DAV:}read',
+     *       'abstract'  => false,
+     *       'aggregates' => [
+     *          [
+     *              'privilege'  => '{DAV:}read-acl',
+     *              'abstract'   => false,
+     *              'aggregates' => [],
+     *          ]
+     *       ]
+     *    ]
+     * ]
      *
      * @param string|INode $node
      * @return array
@@ -328,73 +444,71 @@ class Plugin extends DAV\ServerPlugin {
             $node = $this->server->tree->getNodeForPath($node);
         }
 
+        $supportedPrivileges = null;
         if ($node instanceof IACL) {
-            $result = $node->getSupportedPrivilegeSet();
-
-            if ($result)
-                return $result;
+            $supportedPrivileges = $node->getSupportedPrivilegeSet();
         }
 
-        return self::getDefaultSupportedPrivilegeSet();
+        if (is_null($supportedPrivileges)) {
 
-    }
-
-    /**
-     * Returns a fairly standard set of privileges, which may be useful for
-     * other systems to use as a basis.
-     *
-     * @return array
-     */
-    static function getDefaultSupportedPrivilegeSet() {
-
-        return [
-            'privilege'  => '{DAV:}all',
-            'abstract'   => true,
-            'aggregates' => [
-                [
-                    'privilege'  => '{DAV:}read',
+            // Default
+            $supportedPrivileges = [
+                '{DAV:}read' => [
+                    'abstract'   => false,
                     'aggregates' => [
-                        [
-                            'privilege' => '{DAV:}read-acl',
-                            'abstract'  => false,
+                        '{DAV:}read-acl' => [
+                            'abstract'   => false,
+                            'aggregates' => [],
                         ],
-                        [
-                            'privilege' => '{DAV:}read-current-user-privilege-set',
-                            'abstract'  => false,
+                        '{DAV:}read-current-user-privilege-set' => [
+                            'abstract'   => false,
+                            'aggregates' => [],
                         ],
                     ],
-                ], // {DAV:}read
-                [
-                    'privilege'  => '{DAV:}write',
+                ],
+                '{DAV:}write' => [
+                    'abstract'   => false,
                     'aggregates' => [
-                        [
-                            'privilege' => '{DAV:}write-acl',
-                            'abstract'  => false,
-                        ],
-                        [
-                            'privilege' => '{DAV:}write-properties',
-                            'abstract'  => false,
-                        ],
-                        [
-                            'privilege' => '{DAV:}write-content',
-                            'abstract'  => false,
+                        '{DAV:}write-properties' => [
+                            'abstract'   => false,
+                            'aggregates' => [],
                         ],
-                        [
-                            'privilege' => '{DAV:}bind',
-                            'abstract'  => false,
+                        '{DAV:}write-content' => [
+                            'abstract'   => false,
+                            'aggregates' => [],
                         ],
-                        [
-                            'privilege' => '{DAV:}unbind',
-                            'abstract'  => false,
-                        ],
-                        [
-                            'privilege' => '{DAV:}unlock',
-                            'abstract'  => false,
+                        '{DAV:}unlock' => [
+                            'abstract'   => false,
+                            'aggregates' => [],
                         ],
                     ],
-                ], // {DAV:}write
-            ],
-        ]; // {DAV:}all
+                ],
+            ];
+            if ($node instanceof \Sabre\DAV\ICollection) {
+                $supportedPrivileges['{DAV:}write']['aggregates']['{DAV:}bind'] = [
+                    'abstract'   => false,
+                    'aggregates' => [],
+                ];
+                $supportedPrivileges['{DAV:}write']['aggregates']['{DAV:}unbind'] = [
+                    'abstract'   => false,
+                    'aggregates' => [],
+                ];
+            }
+            if ($node instanceof \Sabre\DAVACL\IACL) {
+                $supportedPrivileges['{DAV:}write']['aggregates']['{DAV:}write-acl'] = [
+                    'abstract'   => false,
+                    'aggregates' => [],
+                ];
+            }
+
+        }
+
+        $this->server->emit(
+            'getSupportedPrivilegeSet',
+            [$node, &$supportedPrivileges]
+        );
+
+        return $supportedPrivileges;
 
     }
 
@@ -414,35 +528,38 @@ class Plugin extends DAV\ServerPlugin {
      */
     final function getFlatPrivilegeSet($node) {
 
-        $privs = $this->getSupportedPrivilegeSet($node);
+        $privs = [
+            'abstract'   => false,
+            'aggregates' => $this->getSupportedPrivilegeSet($node)
+        ];
 
         $fpsTraverse = null;
-        $fpsTraverse = function($priv, $concrete, &$flat) use (&$fpsTraverse) {
+        $fpsTraverse = function($privName, $privInfo, $concrete, &$flat) use (&$fpsTraverse) {
 
             $myPriv = [
-                'privilege'  => $priv['privilege'],
-                'abstract'   => isset($priv['abstract']) && $priv['abstract'],
+                'privilege'  => $privName,
+                'abstract'   => isset($privInfo['abstract']) && $privInfo['abstract'],
                 'aggregates' => [],
-                'concrete'   => isset($priv['abstract']) && $priv['abstract'] ? $concrete : $priv['privilege'],
+                'concrete'   => isset($privInfo['abstract']) && $privInfo['abstract'] ? $concrete : $privName,
             ];
 
-            if (isset($priv['aggregates'])) {
+            if (isset($privInfo['aggregates'])) {
 
-                foreach ($priv['aggregates'] as $subPriv) {
+                foreach ($privInfo['aggregates'] as $subPrivName => $subPrivInfo) {
 
-                    $myPriv['aggregates'][] = $subPriv['privilege'];
+                    $myPriv['aggregates'][] = $subPrivName;
 
                 }
 
             }
 
-            $flat[$priv['privilege']] = $myPriv;
+            $flat[$privName] = $myPriv;
 
-            if (isset($priv['aggregates'])) {
+            if (isset($privInfo['aggregates'])) {
 
-                foreach ($priv['aggregates'] as $subPriv) {
+                foreach ($privInfo['aggregates'] as $subPrivName => $subPrivInfo) {
 
-                    $fpsTraverse($subPriv, $myPriv['concrete'], $flat);
+                    $fpsTraverse($subPrivName, $subPrivInfo, $myPriv['concrete'], $flat);
 
                 }
 
@@ -451,7 +568,7 @@ class Plugin extends DAV\ServerPlugin {
         };
 
         $flat = [];
-        $fpsTraverse($privs, null, $flat);
+        $fpsTraverse('{DAV:}all', $privs, null, $flat);
 
         return $flat;
 
@@ -467,13 +584,13 @@ class Plugin extends DAV\ServerPlugin {
      * @param string|DAV\INode $node
      * @return array
      */
-    function getACL($node) {
+    function getAcl($node) {
 
         if (is_string($node)) {
             $node = $this->server->tree->getNodeForPath($node);
         }
         if (!$node instanceof IACL) {
-            return null;
+            return $this->getDefaultAcl();
         }
         $acl = $node->getACL();
         foreach ($this->adminPrincipals as $adminPrincipal) {
@@ -506,12 +623,10 @@ class Plugin extends DAV\ServerPlugin {
 
         $acl = $this->getACL($node);
 
-        if (is_null($acl)) return null;
-
-        $principals = $this->getCurrentUserPrincipals();
-
         $collected = [];
 
+        $isAuthenticated = $this->getCurrentUserPrincipal() !== null;
+
         foreach ($acl as $ace) {
 
             $principal = $ace['principal'];
@@ -520,7 +635,7 @@ class Plugin extends DAV\ServerPlugin {
 
                 case '{DAV:}owner' :
                     $owner = $node->getOwner();
-                    if ($owner && in_array($owner, $principals)) {
+                    if ($owner && $this->principalMatchesPrincipal($owner)) {
                         $collected[] = $ace;
                     }
                     break;
@@ -528,21 +643,25 @@ class Plugin extends DAV\ServerPlugin {
 
                 // 'all' matches for every user
                 case '{DAV:}all' :
+                    $collected[] = $ace;
+                    break;
 
-                // 'authenticated' matched for every user that's logged in.
-                // Since it's not possible to use ACL while not being logged
-                // in, this is also always true.
                 case '{DAV:}authenticated' :
-                    $collected[] = $ace;
+                    // Authenticated users only
+                    if ($isAuthenticated) {
+                        $collected[] = $ace;
+                    }
                     break;
 
-                // 'unauthenticated' can never occur either, so we simply
-                // ignore these.
                 case '{DAV:}unauthenticated' :
+                    // Unauthenticated users only
+                    if (!$isAuthenticated) {
+                        $collected[] = $ace;
+                    }
                     break;
 
                 default :
-                    if (in_array($ace['principal'], $principals)) {
+                    if ($this->principalMatchesPrincipal($ace['principal'])) {
                         $collected[] = $ace;
                     }
                     break;
@@ -561,6 +680,11 @@ class Plugin extends DAV\ServerPlugin {
             $current = array_pop($collected);
             $collected2[] = $current['privilege'];
 
+            if (!isset($flat[$current['privilege']])) {
+                // Ignoring privileges that are not in the supported-privileges list.
+                $this->server->getLogger()->debug('A node has the "' . $current['privilege'] . '" in its ACL list, but this privilege was not reported in the supportedPrivilegeSet list. This will be ignored.');
+                continue;
+            }
             foreach ($flat[$current['privilege']]['aggregates'] as $subPriv) {
                 $collected2[] = $subPriv;
                 $collected[] = $flat[$subPriv];
@@ -587,7 +711,13 @@ class Plugin extends DAV\ServerPlugin {
         $collections = $this->principalCollectionSet;
         foreach ($collections as $collection) {
 
-            $principalCollection = $this->server->tree->getNodeForPath($collection);
+            try {
+                $principalCollection = $this->server->tree->getNodeForPath($collection);
+            } catch (NotFound $e) {
+                // Ignore and move on
+                continue;
+            }
+
             if (!$principalCollection instanceof IPrincipalCollection) {
                 // Not a principal collection, we're simply going to ignore
                 // this.
@@ -673,6 +803,14 @@ class Plugin extends DAV\ServerPlugin {
      */
     function initialize(DAV\Server $server) {
 
+        if ($this->allowUnauthenticatedAccess) {
+            $authPlugin = $server->getPlugin('auth');
+            if (!$authPlugin) {
+                throw new \Exception('The Auth plugin must be loaded before the ACL plugin if you want to allow unauthenticated access.');
+            }
+            $authPlugin->autoRequireLogin = false;
+        }
+
         $this->server = $server;
         $server->on('propFind',            [$this, 'propFind'], 20);
         $server->on('beforeMethod',        [$this, 'beforeMethod'], 20);
@@ -683,6 +821,14 @@ class Plugin extends DAV\ServerPlugin {
         $server->on('report',              [$this, 'report']);
         $server->on('method:ACL',          [$this, 'httpAcl']);
         $server->on('onHTMLActionsPanel',  [$this, 'htmlActionsPanel']);
+        $server->on('getPrincipalByUri',  function($principal, &$uri) {
+
+            $uri = $this->getPrincipalByUri($principal);
+
+            // Break event chain
+            if ($uri) return false;
+
+        });
 
         array_push($server->protectedProperties,
             '{DAV:}alternate-URI-set',
@@ -707,9 +853,11 @@ class Plugin extends DAV\ServerPlugin {
         // class.
         $server->xml->elementMap['{DAV:}group-member-set'] = 'Sabre\\DAV\\Xml\\Property\\Href';
         $server->xml->elementMap['{DAV:}acl'] = 'Sabre\\DAVACL\\Xml\\Property\\Acl';
+        $server->xml->elementMap['{DAV:}acl-principal-prop-set'] = 'Sabre\\DAVACL\\Xml\\Request\\AclPrincipalPropSetReport';
         $server->xml->elementMap['{DAV:}expand-property'] = 'Sabre\\DAVACL\\Xml\\Request\\ExpandPropertyReport';
         $server->xml->elementMap['{DAV:}principal-property-search'] = 'Sabre\\DAVACL\\Xml\\Request\\PrincipalPropertySearchReport';
         $server->xml->elementMap['{DAV:}principal-search-property-set'] = 'Sabre\\DAVACL\\Xml\\Request\\PrincipalSearchPropertySetReport';
+        $server->xml->elementMap['{DAV:}principal-match'] = 'Sabre\\DAVACL\\Xml\\Request\\PrincipalMatchReport';
 
     }
 
@@ -743,7 +891,6 @@ class Plugin extends DAV\ServerPlugin {
 
             case 'PUT' :
             case 'LOCK' :
-            case 'UNLOCK' :
                 // This method requires the write-content priv if the node
                 // already exists, and bind on the parent if the node is being
                 // created.
@@ -751,6 +898,9 @@ class Plugin extends DAV\ServerPlugin {
                 $this->checkPrivileges($path, '{DAV:}write-content');
                 break;
 
+            case 'UNLOCK' :
+                // Unlock is always allowed at the moment.
+                break;
 
             case 'PROPPATCH' :
                 $this->checkPrivileges($path, '{DAV:}write-properties');
@@ -774,7 +924,6 @@ class Plugin extends DAV\ServerPlugin {
                 // If MOVE is used beforeUnbind will also be used to check if
                 // the sourcenode can be deleted.
                 $this->checkPrivileges($path, '{DAV:}read', self::R_RECURSIVE);
-
                 break;
 
         }
@@ -864,24 +1013,24 @@ class Plugin extends DAV\ServerPlugin {
         if ($node instanceof IPrincipal) {
 
             $propFind->handle('{DAV:}alternate-URI-set', function() use ($node) {
-                return new DAV\Xml\Property\Href($node->getAlternateUriSet());
+                return new Href($node->getAlternateUriSet());
             });
             $propFind->handle('{DAV:}principal-URL', function() use ($node) {
-                return new DAV\Xml\Property\Href($node->getPrincipalUrl() . '/');
+                return new Href($node->getPrincipalUrl() . '/');
             });
             $propFind->handle('{DAV:}group-member-set', function() use ($node) {
                 $members = $node->getGroupMemberSet();
                 foreach ($members as $k => $member) {
                     $members[$k] = rtrim($member, '/') . '/';
                 }
-                return new DAV\Xml\Property\Href($members);
+                return new Href($members);
             });
             $propFind->handle('{DAV:}group-membership', function() use ($node) {
                 $members = $node->getGroupMembership();
                 foreach ($members as $k => $member) {
                     $members[$k] = rtrim($member, '/') . '/';
                 }
-                return new DAV\Xml\Property\Href($members);
+                return new Href($members);
             });
             $propFind->handle('{DAV:}displayname', [$node, 'getDisplayName']);
 
@@ -892,7 +1041,7 @@ class Plugin extends DAV\ServerPlugin {
             $val = $this->principalCollectionSet;
             // Ensuring all collections end with a slash
             foreach ($val as $k => $v) $val[$k] = $v . '/';
-            return new DAV\Xml\Property\Href($val);
+            return new Href($val);
 
         });
         $propFind->handle('{DAV:}current-user-principal', function() {
@@ -910,9 +1059,7 @@ class Plugin extends DAV\ServerPlugin {
                 $propFind->set('{DAV:}current-user-privilege-set', null, 403);
             } else {
                 $val = $this->getCurrentUserPrivilegeSet($node);
-                if (!is_null($val)) {
-                    return new Xml\Property\CurrentUserPrivilegeSet($val);
-                }
+                return new Xml\Property\CurrentUserPrivilegeSet($val);
             }
         });
         $propFind->handle('{DAV:}acl', function() use ($node, $propFind, $path) {
@@ -921,9 +1068,7 @@ class Plugin extends DAV\ServerPlugin {
                 $propFind->set('{DAV:}acl', null, 403);
             } else {
                 $acl = $this->getACL($node);
-                if (!is_null($acl)) {
-                    return new Xml\Property\Acl($this->getACL($node));
-                }
+                return new Xml\Property\Acl($this->getACL($node));
             }
         });
         $propFind->handle('{DAV:}acl-restrictions', function() {
@@ -933,7 +1078,7 @@ class Plugin extends DAV\ServerPlugin {
         /* Adding ACL properties */
         if ($node instanceof IACL) {
             $propFind->handle('{DAV:}owner', function() use ($node) {
-                return new DAV\Xml\Property\Href($node->getOwner() . '/');
+                return new Href($node->getOwner() . '/');
             });
         }
 
@@ -952,7 +1097,7 @@ class Plugin extends DAV\ServerPlugin {
         $propPatch->handle('{DAV:}group-member-set', function($value) use ($path) {
             if (is_null($value)) {
                 $memberSet = [];
-            } elseif ($value instanceof DAV\Xml\Property\Href) {
+            } elseif ($value instanceof Href) {
                 $memberSet = array_map(
                     [$this->server, 'calculateUri'],
                     $value->getHrefs()
@@ -990,15 +1135,23 @@ class Plugin extends DAV\ServerPlugin {
 
             case '{DAV:}principal-property-search' :
                 $this->server->transactionType = 'report-principal-property-search';
-                $this->principalPropertySearchReport($report);
+                $this->principalPropertySearchReport($path, $report);
                 return false;
             case '{DAV:}principal-search-property-set' :
                 $this->server->transactionType = 'report-principal-search-property-set';
-                $this->principalSearchPropertySetReport($report);
+                $this->principalSearchPropertySetReport($path, $report);
                 return false;
             case '{DAV:}expand-property' :
                 $this->server->transactionType = 'report-expand-property';
-                $this->expandPropertyReport($report);
+                $this->expandPropertyReport($path, $report);
+                return false;
+            case '{DAV:}principal-match' :
+                $this->server->transactionType = 'report-principal-match';
+                $this->principalMatchReport($path, $report);
+                return false;
+            case '{DAV:}acl-principal-prop-set' :
+                $this->server->transactionType = 'acl-principal-prop-set';
+                $this->aclPrincipalPropSetReport($path, $report);
                 return false;
 
         }
@@ -1073,7 +1226,7 @@ class Plugin extends DAV\ServerPlugin {
             // Looking up the principal
             try {
                 $principal = $this->server->tree->getNodeForPath($newAce['principal']);
-            } catch (DAV\Exception\NotFound $e) {
+            } catch (NotFound $e) {
                 throw new Exception\NotRecognizedPrincipal('The specified principal (' . $newAce['principal'] . ') does not exist');
             }
             if (!($principal instanceof IPrincipal)) {
@@ -1095,7 +1248,110 @@ class Plugin extends DAV\ServerPlugin {
     /* Reports {{{ */
 
     /**
-     * The expand-property report is defined in RFC3253 section 3-8.
+     * The principal-match report is defined in RFC3744, section 9.3.
+     *
+     * This report allows a client to figure out based on the current user,
+     * or a principal URL, the principal URL and principal URLs of groups that
+     * principal belongs to.
+     *
+     * @param string $path
+     * @param Xml\Request\PrincipalMatchReport $report
+     * @return void
+     */
+    protected function principalMatchReport($path, Xml\Request\PrincipalMatchReport $report) {
+
+        $depth = $this->server->getHTTPDepth(0);
+        if ($depth !== 0) {
+            throw new BadRequest('The principal-match report is only defined on Depth: 0');
+        }
+
+        $currentPrincipals = $this->getCurrentUserPrincipals();
+
+        $result = [];
+
+        if ($report->type === Xml\Request\PrincipalMatchReport::SELF) {
+
+            // Finding all principals under the request uri that match the
+            // current principal.
+            foreach ($currentPrincipals as $currentPrincipal) {
+
+                if ($currentPrincipal === $path || strpos($currentPrincipal, $path . '/') === 0) {
+                    $result[] = $currentPrincipal;
+                }
+
+            }
+
+        } else {
+
+            // We need to find all resources that have a property that matches
+            // one of the current principals.
+            $candidates = $this->server->getPropertiesForPath(
+                $path,
+                [$report->principalProperty],
+                1
+            );
+
+            foreach ($candidates as $candidate) {
+
+                if (!isset($candidate[200][$report->principalProperty])) {
+                    continue;
+                }
+
+                $hrefs = $candidate[200][$report->principalProperty];
+
+                if (!$hrefs instanceof Href) {
+                    continue;
+                }
+
+                foreach ($hrefs->getHrefs() as $href) {
+                    if (in_array(trim($href, '/'), $currentPrincipals)) {
+                        $result[] = $candidate['href'];
+                        continue 2;
+                    }
+                }
+            }
+
+        }
+
+        $responses = [];
+
+        foreach ($result as $item) {
+
+            $properties = [];
+
+            if ($report->properties) {
+
+                $foo = $this->server->getPropertiesForPath($item, $report->properties);
+                $foo = $foo[0];
+                $item = $foo['href'];
+                unset($foo['href']);
+                $properties = $foo;
+
+            }
+
+            $responses[] = new DAV\Xml\Element\Response(
+                $item,
+                $properties,
+                '200'
+            );
+
+        }
+
+        $this->server->httpResponse->setHeader('Content-Type', 'application/xml; charset=utf-8');
+        $this->server->httpResponse->setStatus(207);
+        $this->server->httpResponse->setBody(
+            $this->server->xml->write(
+                '{DAV:}multistatus',
+                $responses,
+                $this->server->getBaseUri()
+            )
+        );
+
+
+    }
+
+    /**
+     * The expand-property report is defined in RFC3253 section 3.8.
      *
      * This report is very similar to a standard PROPFIND. The difference is
      * that it has the additional ability to look at properties containing a
@@ -1105,15 +1361,15 @@ class Plugin extends DAV\ServerPlugin {
      * Other rfc's, such as ACL rely on this report, so it made sense to put
      * it in this plugin.
      *
+     * @param string $path
      * @param Xml\Request\ExpandPropertyReport $report
      * @return void
      */
-    protected function expandPropertyReport($report) {
+    protected function expandPropertyReport($path, $report) {
 
         $depth = $this->server->getHTTPDepth(0);
-        $requestUri = $this->server->getRequestUri();
 
-        $result = $this->expandProperties($requestUri, $report->properties, $depth);
+        $result = $this->expandProperties($path, $report->properties, $depth);
 
         $xml = $this->server->xml->write(
             '{DAV:}multistatus',
@@ -1187,10 +1443,11 @@ class Plugin extends DAV\ServerPlugin {
      * of properties the client may search on, using the
      * {DAV:}principal-property-search report.
      *
+     * @param string $path
      * @param Xml\Request\PrincipalSearchPropertySetReport $report
      * @return void
      */
-    protected function principalSearchPropertySetReport($report) {
+    protected function principalSearchPropertySetReport($path, $report) {
 
         $httpDepth = $this->server->getHTTPDepth(0);
         if ($httpDepth !== 0) {
@@ -1241,14 +1498,14 @@ class Plugin extends DAV\ServerPlugin {
      * clients to search for groups of principals, based on the value of one
      * or more properties.
      *
+     * @param string $path
      * @param Xml\Request\PrincipalPropertySearchReport $report
      * @return void
      */
-    protected function principalPropertySearchReport($report) {
+    protected function principalPropertySearchReport($path, Xml\Request\PrincipalPropertySearchReport $report) {
 
-        $uri = null;
-        if (!$report->applyToPrincipalCollectionSet) {
-            $uri = $this->server->httpRequest->getPath();
+        if ($report->applyToPrincipalCollectionSet) {
+            $path = null;
         }
         if ($this->server->getHttpDepth('0') !== 0) {
             throw new BadRequest('Depth must be 0');
@@ -1256,7 +1513,7 @@ class Plugin extends DAV\ServerPlugin {
         $result = $this->principalSearch(
             $report->searchProperties,
             $report->properties,
-            $uri,
+            $path,
             $report->test
         );
 
@@ -1269,6 +1526,64 @@ class Plugin extends DAV\ServerPlugin {
 
     }
 
+    /**
+     * aclPrincipalPropSet REPORT
+     *
+     * This method is responsible for handling the {DAV:}acl-principal-prop-set
+     * REPORT, as defined in:
+     *
+     * https://tools.ietf.org/html/rfc3744#section-9.2
+     *
+     * This REPORT allows a user to quickly fetch information about all
+     * principals specified in the access control list. Most commonly this
+     * is used to for example generate a UI with ACL rules, allowing you
+     * to show names for principals for every entry.
+     *
+     * @param string $path
+     * @param Xml\Request\AclPrincipalPropSetReport $report
+     * @return void
+     */
+    protected function aclPrincipalPropSetReport($path, Xml\Request\AclPrincipalPropSetReport $report) {
+
+        if ($this->server->getHTTPDepth(0) !== 0) {
+            throw new BadRequest('The {DAV:}acl-principal-prop-set REPORT only supports Depth 0');
+        }
+
+        // Fetching ACL rules for the given path. We're using the property
+        // API and not the local getACL, because it will ensure that all
+        // business rules and restrictions are applied.
+        $acl = $this->server->getProperties($path, '{DAV:}acl');
+
+        if (!$acl || !isset($acl['{DAV:}acl'])) {
+            throw new Forbidden('Could not fetch ACL rules for this path');
+        }
+
+        $principals = [];
+        foreach ($acl['{DAV:}acl']->getPrivileges() as $ace) {
+
+            if ($ace['principal'][0] === '{') {
+                // It's not a principal, it's one of the special rules such as {DAV:}authenticated
+                continue;
+            }
+
+            $principals[] = $ace['principal'];
+
+        }
+
+        $properties = $this->server->getPropertiesForMultiplePaths(
+            $principals,
+            $report->properties
+        );
+
+        $this->server->httpResponse->setStatus(207);
+        $this->server->httpResponse->setHeader('Content-Type', 'application/xml; charset=utf-8');
+        $this->server->httpResponse->setBody(
+            $this->server->generateMultiStatus($properties)
+        );
+
+    }
+
+
     /* }}} */
 
     /**
diff --git a/vendor/sabre/dav/lib/DAVACL/Principal.php b/vendor/sabre/dav/lib/DAVACL/Principal.php
index 16375d3fc..6ebb30907 100644
--- a/vendor/sabre/dav/lib/DAVACL/Principal.php
+++ b/vendor/sabre/dav/lib/DAVACL/Principal.php
@@ -22,6 +22,8 @@ use Sabre\HTTP\URLUtil;
  */
 class Principal extends DAV\Node implements IPrincipal, DAV\IProperties, IACL {
 
+    use ACLTrait;
+
     /**
      * Struct with principal information.
      *
@@ -216,73 +218,4 @@ class Principal extends DAV\Node implements IPrincipal, DAV\IProperties, IACL {
 
     }
 
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-
-        return null;
-
-    }
-
-    /**
-     * Returns a list of ACE's for this node.
-     *
-     * Each ACE has the following properties:
-     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
-     *     currently the only supported privileges
-     *   * 'principal', a url to the principal who owns the node
-     *   * 'protected' (optional), indicating that this ACE is not allowed to
-     *      be updated.
-     *
-     * @return array
-     */
-    function getACL() {
-
-        return [
-            [
-                'privilege' => '{DAV:}read',
-                'principal' => '{DAV:}authenticated',
-                'protected' => true,
-            ],
-        ];
-
-    }
-
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new DAV\Exception\MethodNotAllowed('Updating ACLs is not allowed here');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/PDO.php b/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/PDO.php
index 01b7a175c..a491dc88f 100644
--- a/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/PDO.php
+++ b/vendor/sabre/dav/lib/DAVACL/PrincipalBackend/PDO.php
@@ -300,7 +300,7 @@ class PDO extends AbstractBackend implements CreatePrincipalSupport {
         $value = null;
         $scheme = null;
         list($scheme, $value) = explode(":", $uri, 2);
-        if ($value == null) return null;
+        if (empty($value)) return null;
 
         $uri = null;
         switch ($scheme){
diff --git a/vendor/sabre/dav/lib/DAVACL/PrincipalCollection.php b/vendor/sabre/dav/lib/DAVACL/PrincipalCollection.php
index 54911e7b5..d8a90153a 100644
--- a/vendor/sabre/dav/lib/DAVACL/PrincipalCollection.php
+++ b/vendor/sabre/dav/lib/DAVACL/PrincipalCollection.php
@@ -3,7 +3,6 @@
 namespace Sabre\DAVACL;
 
 use Sabre\DAV\Exception\InvalidResourceType;
-use Sabre\DAV\Exception\Forbidden;
 use Sabre\DAV\IExtendedCollection;
 use Sabre\DAV\MkCol;
 
@@ -19,6 +18,8 @@ use Sabre\DAV\MkCol;
  */
 class PrincipalCollection extends AbstractPrincipalCollection implements IExtendedCollection, IACL {
 
+    use ACLTrait;
+
     /**
      * This method returns a node for a principal.
      *
@@ -73,28 +74,6 @@ class PrincipalCollection extends AbstractPrincipalCollection implements IExtend
     }
 
     /**
-     * Returns the owner principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getOwner() {
-        return null;
-    }
-
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    function getGroup() {
-        return null;
-    }
-
-    /**
      * Returns a list of ACE's for this node.
      *
      * Each ACE has the following properties:
@@ -116,36 +95,4 @@ class PrincipalCollection extends AbstractPrincipalCollection implements IExtend
         ];
     }
 
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's as an array argument.
-     *
-     * @param array $acl
-     * @return void
-     */
-    function setACL(array $acl) {
-
-        throw new Forbidden('Updating ACLs is not allowed on this node');
-
-    }
-
-    /**
-     * Returns the list of supported privileges for this node.
-     *
-     * The returned data structure is a list of nested privileges.
-     * See Sabre\DAVACL\Plugin::getDefaultSupportedPrivilegeSet for a simple
-     * standard structure.
-     *
-     * If null is returned from this method, the default privilege set is used,
-     * which is fine for most common usecases.
-     *
-     * @return array|null
-     */
-    function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
 }
diff --git a/vendor/sabre/dav/lib/DAVACL/Xml/Property/SupportedPrivilegeSet.php b/vendor/sabre/dav/lib/DAVACL/Xml/Property/SupportedPrivilegeSet.php
index 572bed4dd..55e7783ae 100644
--- a/vendor/sabre/dav/lib/DAVACL/Xml/Property/SupportedPrivilegeSet.php
+++ b/vendor/sabre/dav/lib/DAVACL/Xml/Property/SupportedPrivilegeSet.php
@@ -73,7 +73,7 @@ class SupportedPrivilegeSet implements XmlSerializable, HtmlOutput {
      */
     function xmlSerialize(Writer $writer) {
 
-        $this->serializePriv($writer, $this->privileges);
+        $this->serializePriv($writer, '{DAV:}all', [ 'aggregates' => $this->privileges]);
 
     }
 
@@ -93,9 +93,9 @@ class SupportedPrivilegeSet implements XmlSerializable, HtmlOutput {
      */
     function toHtml(HtmlOutputHelper $html) {
 
-        $traverse = function($priv) use (&$traverse, $html) {
+        $traverse = function($privName, $priv) use (&$traverse, $html) {
             echo "<li>";
-            echo $html->xmlName($priv['privilege']);
+            echo $html->xmlName($privName);
             if (isset($priv['abstract']) && $priv['abstract']) {
                 echo " <i>(abstract)</i>";
             }
@@ -104,8 +104,8 @@ class SupportedPrivilegeSet implements XmlSerializable, HtmlOutput {
             }
             if (isset($priv['aggregates'])) {
                 echo "\n<ul>\n";
-                foreach ($priv['aggregates'] as $subPriv) {
-                    $traverse($subPriv);
+                foreach ($priv['aggregates'] as $subPrivName => $subPriv) {
+                    $traverse($subPrivName, $subPriv);
                 }
                 echo "</ul>";
             }
@@ -114,7 +114,7 @@ class SupportedPrivilegeSet implements XmlSerializable, HtmlOutput {
 
         ob_start();
         echo "<ul class=\"tree\">";
-        $traverse($this->getValue());
+        $traverse('{DAV:}all', [ 'aggregates' => $this->getValue() ]);
         echo "</ul>\n";
 
         return ob_get_clean();
@@ -132,12 +132,12 @@ class SupportedPrivilegeSet implements XmlSerializable, HtmlOutput {
      * @param array $privilege
      * @return void
      */
-    private function serializePriv(Writer $writer, $privilege) {
+    private function serializePriv(Writer $writer, $privName, $privilege) {
 
         $writer->startElement('{DAV:}supported-privilege');
 
         $writer->startElement('{DAV:}privilege');
-        $writer->writeElement($privilege['privilege']);
+        $writer->writeElement($privName);
         $writer->endElement(); // privilege
 
         if (!empty($privilege['abstract'])) {
@@ -147,8 +147,8 @@ class SupportedPrivilegeSet implements XmlSerializable, HtmlOutput {
             $writer->writeElement('{DAV:}description', $privilege['description']);
         }
         if (isset($privilege['aggregates'])) {
-            foreach ($privilege['aggregates'] as $subPrivilege) {
-                $this->serializePriv($writer, $subPrivilege);
+            foreach ($privilege['aggregates'] as $subPrivName => $subPrivilege) {
+                $this->serializePriv($writer, $subPrivName, $subPrivilege);
             }
         }
 
diff --git a/vendor/sabre/dav/lib/DAVACL/Xml/Request/AclPrincipalPropSetReport.php b/vendor/sabre/dav/lib/DAVACL/Xml/Request/AclPrincipalPropSetReport.php
new file mode 100644
index 000000000..f01c1e6ab
--- /dev/null
+++ b/vendor/sabre/dav/lib/DAVACL/Xml/Request/AclPrincipalPropSetReport.php
@@ -0,0 +1,67 @@
+<?php
+
+namespace Sabre\DAVACL\Xml\Request;
+
+use Sabre\Xml\XmlDeserializable;
+use Sabre\Xml\Reader;
+use Sabre\Xml\Deserializer;
+
+/**
+ * AclPrincipalPropSet request parser.
+ *
+ * This class parses the {DAV:}acl-principal-prop-set REPORT, as defined in:
+ *
+ * https://tools.ietf.org/html/rfc3744#section-9.2
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (https://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class AclPrincipalPropSetReport implements XmlDeserializable {
+
+    public $properties = [];
+
+    /**
+     * The deserialize method is called during xml parsing.
+     *
+     * This method is called statictly, this is because in theory this method
+     * may be used as a type of constructor, or factory method.
+     *
+     * Often you want to return an instance of the current class, but you are
+     * free to return other data as well.
+     *
+     * You are responsible for advancing the reader to the next element. Not
+     * doing anything will result in a never-ending loop.
+     *
+     * If you just want to skip parsing for this element altogether, you can
+     * just call $reader->next();
+     *
+     * $reader->parseInnerTree() will parse the entire sub-tree, and advance to
+     * the next element.
+     *
+     * @param Reader $reader
+     * @return mixed
+     */
+    static function xmlDeserialize(Reader $reader) {
+       
+        $reader->pushContext();
+        $reader->elementMap['{DAV:}prop'] = 'Sabre\Xml\Deserializer\enum';
+
+        $elems = Deserializer\keyValue(
+            $reader,
+            'DAV:'
+        );
+
+        $reader->popContext();
+
+        $report = new self();
+
+        if (!empty($elems['prop'])) {
+            $report->properties = $elems['prop'];
+        }
+
+        return $report;
+
+    }
+
+}
diff --git a/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalMatchReport.php b/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalMatchReport.php
new file mode 100644
index 000000000..5c4e88189
--- /dev/null
+++ b/vendor/sabre/dav/lib/DAVACL/Xml/Request/PrincipalMatchReport.php
@@ -0,0 +1,107 @@
+<?php
+
+namespace Sabre\DAVACL\Xml\Request;
+
+use Sabre\Xml\XmlDeserializable;
+use Sabre\Xml\Reader;
+use Sabre\Xml\Deserializer;
+
+/**
+ * PrincipalMatchReport request parser.
+ *
+ * This class parses the {DAV:}principal-match REPORT, as defined
+ * in:
+ *
+ * https://tools.ietf.org/html/rfc3744#section-9.3
+ *
+ * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class PrincipalMatchReport implements XmlDeserializable {
+
+    /**
+     * Report on a list of principals that match the current principal.
+     */
+    const SELF = 1;
+
+    /**
+     * Report on a property on resources, such as {DAV:}owner, that match the current principal.
+     */
+    const PRINCIPAL_PROPERTY = 2;
+
+    /**
+     * Must be SELF or PRINCIPAL_PROPERTY
+     *
+     * @var int
+     */
+    public $type;
+
+    /**
+     * List of properties that are being requested for matching resources.
+     *
+     * @var string[]
+     */
+    public $properties = [];
+
+    /**
+     * If $type = PRINCIPAL_PROPERTY, which WebDAV property we should compare
+     * to the current principal.
+     *
+     * @var string
+     */
+    public $principalProperty;
+
+    /**
+     * The deserialize method is called during xml parsing.
+     *
+     * This method is called statictly, this is because in theory this method
+     * may be used as a type of constructor, or factory method.
+     *
+     * Often you want to return an instance of the current class, but you are
+     * free to return other data as well.
+     *
+     * You are responsible for advancing the reader to the next element. Not
+     * doing anything will result in a never-ending loop.
+     *
+     * If you just want to skip parsing for this element altogether, you can
+     * just call $reader->next();
+     *
+     * $reader->parseInnerTree() will parse the entire sub-tree, and advance to
+     * the next element.
+     *
+     * @param Reader $reader
+     * @return mixed
+     */
+    static function xmlDeserialize(Reader $reader) {
+
+        $reader->pushContext();
+        $reader->elementMap['{DAV:}prop'] = 'Sabre\Xml\Deserializer\enum';
+
+        $elems = Deserializer\keyValue(
+            $reader,
+            'DAV:'
+        );
+
+        $reader->popContext();
+
+        $principalMatch = new self();
+
+        if (array_key_exists('self', $elems)) {
+            $principalMatch->type = self::SELF;
+        }
+
+        if (array_key_exists('principal-property', $elems)) {
+            $principalMatch->type = self::PRINCIPAL_PROPERTY;
+            $principalMatch->principalProperty = $elems['principal-property'][0]['name'];
+        }
+
+        if (!empty($elems['prop'])) {
+            $principalMatch->properties = $elems['prop'];
+        }
+
+        return $principalMatch;
+
+    }
+
+}
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/AbstractPDOTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/AbstractPDOTest.php
index 25f8b1794..2a00f7925 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/AbstractPDOTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/AbstractPDOTest.php
@@ -5,11 +5,30 @@ namespace Sabre\CalDAV\Backend;
 use Sabre\CalDAV;
 use Sabre\DAV;
 use Sabre\DAV\PropPatch;
+use Sabre\DAV\Xml\Element\Sharee;
 
 abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
+    use DAV\DbTestHelperTrait;
+
     protected $pdo;
 
+    function setUp() {
+
+        $this->dropTables([
+            'calendarobjects',
+            'calendars',
+            'calendarinstances',
+            'calendarchanges',
+            'calendarsubscriptions',
+            'schedulingobjects',
+        ]);
+        $this->createSchema('calendars');
+
+        $this->pdo = $this->getDb();
+
+    }
+
     function testConstruct() {
 
         $backend = new PDO($this->pdo);
@@ -42,11 +61,11 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $calendars = $backend->getCalendarsForUser('principals/user2');
 
         $elementCheck = [
-            'id'                                                      => $returnedId,
             'uri'                                                     => 'somerandomid',
             '{DAV:}displayname'                                       => 'Hello!',
             '{urn:ietf:params:xml:ns:caldav}calendar-description'     => '',
             '{urn:ietf:params:xml:ns:caldav}schedule-calendar-transp' => new CalDAV\Xml\Property\ScheduleCalendarTransp('transparent'),
+            'share-access'                                            => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
         ];
 
         $this->assertInternalType('array', $calendars);
@@ -110,6 +129,27 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
     }
 
     /**
+     * @depends testConstruct
+     * @expectedException \InvalidArgumentException
+     */
+    function testUpdateCalendarBadId() {
+
+        $backend = new PDO($this->pdo);
+
+        //Creating a new calendar
+        $newId = $backend->createCalendar('principals/user2', 'somerandomid', []);
+
+        $propPatch = new PropPatch([
+            '{DAV:}displayname'                                       => 'myCalendar',
+            '{urn:ietf:params:xml:ns:caldav}schedule-calendar-transp' => new CalDAV\Xml\Property\ScheduleCalendarTransp('transparent'),
+        ]);
+
+        // Updating the calendar
+        $backend->updateCalendar('raaaa', $propPatch);
+
+    }
+
+    /**
      * @depends testUpdateCalendarAndFetch
      */
     function testUpdateCalendarUnknownProperty() {
@@ -156,6 +196,22 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
     /**
      * @depends testCreateCalendarAndFetch
+     * @expectedException \InvalidArgumentException
+     */
+    function testDeleteCalendarBadID() {
+
+        $backend = new PDO($this->pdo);
+        $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', [
+            '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => new CalDAV\Xml\Property\SupportedCalendarComponentSet(['VEVENT']),
+            '{DAV:}displayname'                                               => 'Hello!',
+        ]);
+
+        $backend->deleteCalendar('bad-id');
+
+    }
+
+    /**
+     * @depends testCreateCalendarAndFetch
      * @expectedException \Sabre\DAV\Exception
      */
     function testCreateCalendarIncorrectComponentSet() {;
@@ -178,7 +234,13 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $backend->createCalendarObject($returnedId, 'random-id', $object);
 
-        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = "random-id"');
+        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = \'random-id\'');
+
+        $row = $result->fetch(\PDO::FETCH_ASSOC);
+        if (is_resource($row['calendardata'])) {
+            $row['calendardata'] = stream_get_contents($row['calendardata']);
+        }
+
         $this->assertEquals([
             'etag'           => md5($object),
             'size'           => strlen($object),
@@ -186,7 +248,7 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             'firstoccurence' => strtotime('20120101'),
             'lastoccurence'  => strtotime('20120101') + (3600 * 24),
             'componenttype'  => 'VEVENT',
-        ], $result->fetch(\PDO::FETCH_ASSOC));
+        ], $row);
 
     }
     function testGetMultipleObjects() {
@@ -207,7 +269,6 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
                 'size'         => strlen($object),
                 'calendardata' => $object,
                 'lastmodified' => null,
-                'calendarid'   => $returnedId,
             ],
             [
                 'id'           => 2,
@@ -216,7 +277,6 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
                 'size'         => strlen($object),
                 'calendardata' => $object,
                 'lastmodified' => null,
-                'calendarid'   => $returnedId,
             ],
         ];
 
@@ -224,12 +284,22 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         foreach ($check as $index => $props) {
 
-            foreach ($props as $key => $value) {
+            foreach ($props as $key => $expected) {
+
+                $actual = $result[$index][$key];
+
+                switch ($key) {
+                    case 'lastmodified' :
+                        $this->assertInternalType('int', $actual);
+                        break;
+                    case 'calendardata' :
+                        if (is_resource($actual)) {
+                            $actual = stream_get_contents($actual);
+                        }
+                        // no break intentional
+                    default :
+                        $this->assertEquals($expected, $actual);
 
-                if ($key !== 'lastmodified') {
-                    $this->assertEquals($value, $result[$index][$key]);
-                } else {
-                    $this->assertTrue(isset($result[$index][$key]));
                 }
 
             }
@@ -239,6 +309,17 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
     }
 
     /**
+     * @depends testGetMultipleObjects
+     * @expectedException \InvalidArgumentException
+     */
+    function testGetMultipleObjectsBadId() {
+
+        $backend = new PDO($this->pdo);
+        $backend->getMultipleCalendarObjects('bad-id', ['foo-bar']);
+
+    }
+
+    /**
      * @expectedException Sabre\DAV\Exception\BadRequest
      * @depends testCreateCalendarObject
      */
@@ -265,7 +346,13 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $backend->createCalendarObject($returnedId, 'random-id', $object);
 
-        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = "random-id"');
+        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = \'random-id\'');
+
+        $row = $result->fetch(\PDO::FETCH_ASSOC);
+        if (is_resource($row['calendardata'])) {
+            $row['calendardata'] = stream_get_contents($row['calendardata']);
+        }
+
         $this->assertEquals([
             'etag'           => md5($object),
             'size'           => strlen($object),
@@ -273,10 +360,26 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             'firstoccurence' => strtotime('20120101'),
             'lastoccurence'  => strtotime('20120101') + (3600 * 48),
             'componenttype'  => 'VEVENT',
-        ], $result->fetch(\PDO::FETCH_ASSOC));
+        ], $row);
+
+    }
+
+    /**
+     * @depends testCreateCalendarObject
+     * @expectedException \InvalidArgumentException
+     */
+    function testCreateCalendarObjectBadId() {
+
+        $backend = new PDO($this->pdo);
+        $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
+
+        $object = "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART;VALUE=DATE:20120101\r\nDURATION:P2D\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n";
+
+        $backend->createCalendarObject('bad-id', 'random-id', $object);
 
     }
 
+
     /**
      * @depends testCreateCalendarObject
      */
@@ -289,7 +392,12 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $backend->createCalendarObject($returnedId, 'random-id', $object);
 
-        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = "random-id"');
+        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = \'random-id\'');
+        $row = $result->fetch(\PDO::FETCH_ASSOC);
+        if (is_resource($row['calendardata'])) {
+            $row['calendardata'] = stream_get_contents($row['calendardata']);
+        }
+
         $this->assertEquals([
             'etag'           => md5($object),
             'size'           => strlen($object),
@@ -297,7 +405,7 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             'firstoccurence' => strtotime('2012-01-01 10:00:00'),
             'lastoccurence'  => strtotime('2012-01-01 10:00:00'),
             'componenttype'  => 'VEVENT',
-        ], $result->fetch(\PDO::FETCH_ASSOC));
+        ], $row);
 
     }
 
@@ -313,7 +421,12 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $backend->createCalendarObject($returnedId, 'random-id', $object);
 
-        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = "random-id"');
+        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = \'random-id\'');
+        $row = $result->fetch(\PDO::FETCH_ASSOC);
+        if (is_resource($row['calendardata'])) {
+            $row['calendardata'] = stream_get_contents($row['calendardata']);
+        }
+
         $this->assertEquals([
             'etag'           => md5($object),
             'size'           => strlen($object),
@@ -321,7 +434,7 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             'firstoccurence' => strtotime('2012-01-01 10:00:00'),
             'lastoccurence'  => strtotime('2012-01-01 11:00:00'),
             'componenttype'  => 'VEVENT',
-        ], $result->fetch(\PDO::FETCH_ASSOC));
+        ], $row);
 
     }
 
@@ -337,7 +450,12 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $backend->createCalendarObject($returnedId, 'random-id', $object);
 
-        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = "random-id"');
+        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = \'random-id\'');
+        $row = $result->fetch(\PDO::FETCH_ASSOC);
+        if (is_resource($row['calendardata'])) {
+            $row['calendardata'] = stream_get_contents($row['calendardata']);
+        }
+
         $this->assertEquals([
             'etag'           => md5($object),
             'size'           => strlen($object),
@@ -345,7 +463,7 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             'firstoccurence' => strtotime('2012-01-01 10:00:00'),
             'lastoccurence'  => strtotime(PDO::MAX_DATE),
             'componenttype'  => 'VEVENT',
-        ], $result->fetch(\PDO::FETCH_ASSOC));
+        ], $row);
 
     }
 
@@ -361,7 +479,12 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $backend->createCalendarObject($returnedId, 'random-id', $object);
 
-        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = "random-id"');
+        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = \'random-id\'');
+        $row = $result->fetch(\PDO::FETCH_ASSOC);
+        if (is_resource($row['calendardata'])) {
+            $row['calendardata'] = stream_get_contents($row['calendardata']);
+        }
+
         $this->assertEquals([
             'etag'           => md5($object),
             'size'           => strlen($object),
@@ -369,7 +492,7 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             'firstoccurence' => strtotime('2012-01-01 10:00:00'),
             'lastoccurence'  => strtotime('2012-01-01 11:00:00') + (3600 * 24 * 999),
             'componenttype'  => 'VEVENT',
-        ], $result->fetch(\PDO::FETCH_ASSOC));
+        ], $row);
 
     }
 
@@ -385,7 +508,12 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $backend->createCalendarObject($returnedId, 'random-id', $object);
 
-        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = "random-id"');
+        $result = $this->pdo->query('SELECT etag, size, calendardata, firstoccurence, lastoccurence, componenttype FROM calendarobjects WHERE uri = \'random-id\'');
+        $row = $result->fetch(\PDO::FETCH_ASSOC);
+        if (is_resource($row['calendardata'])) {
+            $row['calendardata'] = stream_get_contents($row['calendardata']);
+        }
+
         $this->assertEquals([
             'etag'           => md5($object),
             'size'           => strlen($object),
@@ -393,7 +521,7 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             'firstoccurence' => null,
             'lastoccurence'  => null,
             'componenttype'  => 'VTODO',
-        ], $result->fetch(\PDO::FETCH_ASSOC));
+        ], $row);
 
     }
 
@@ -408,17 +536,38 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $object = "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART;VALUE=DATE:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n";
         $backend->createCalendarObject($returnedId, 'random-id', $object);
 
-        $data = $backend->getCalendarObjects($returnedId, 'random-id');
+        $data = $backend->getCalendarObjects($returnedId);
 
         $this->assertEquals(1, count($data));
         $data = $data[0];
 
-        $this->assertEquals($returnedId, $data['calendarid']);
         $this->assertEquals('random-id', $data['uri']);
         $this->assertEquals(strlen($object), $data['size']);
 
+    }
+
+    /**
+     * @depends testGetCalendarObjects
+     * @expectedException \InvalidArgumentException
+     */
+    function testGetCalendarObjectsBadId() {
+
+        $backend = new PDO($this->pdo);
+        $backend->getCalendarObjects('bad-id');
 
     }
+
+    /**
+     * @depends testGetCalendarObjects
+     * @expectedException \InvalidArgumentException
+     */
+    function testGetCalendarObjectBadId() {
+
+        $backend = new PDO($this->pdo);
+        $backend->getCalendarObject('bad-id', 'foo-bar');
+
+    }
+
     /**
      * @depends testCreateCalendarObject
      */
@@ -455,14 +604,28 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $data = $backend->getCalendarObject($returnedId, 'random-id');
 
+        if (is_resource($data['calendardata'])) {
+            $data['calendardata'] = stream_get_contents($data['calendardata']);
+        }
+
         $this->assertEquals($object2, $data['calendardata']);
-        $this->assertEquals($returnedId, $data['calendarid']);
         $this->assertEquals('random-id', $data['uri']);
 
 
     }
 
     /**
+     * @depends testUpdateCalendarObject
+     * @expectedException \InvalidArgumentException
+     */
+    function testUpdateCalendarObjectBadId() {
+
+        $backend = new PDO($this->pdo);
+        $backend->updateCalendarObject('bad-id', 'object-id', 'objectdata');
+
+    }
+
+    /**
      * @depends testCreateCalendarObject
      */
     function testDeleteCalendarObject() {
@@ -479,6 +642,21 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
     }
 
+    /**
+     * @depends testDeleteCalendarObject
+     * @expectedException \InvalidArgumentException
+     */
+    function testDeleteCalendarObjectBadId() {
+
+        $backend = new PDO($this->pdo);
+        $returnedId = $backend->createCalendar('principals/user2', 'somerandomid', []);
+
+        $object = "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART;VALUE=DATE:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n";
+        $backend->createCalendarObject($returnedId, 'random-id', $object);
+        $backend->deleteCalendarObject('bad-id', 'random-id');
+
+    }
+
     function testCalendarQueryNoResult() {
 
         $abstract = new PDO($this->pdo);
@@ -499,15 +677,42 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         ];
 
         $this->assertEquals([
-        ], $abstract->calendarQuery(1, $filters));
+        ], $abstract->calendarQuery([1, 1], $filters));
+
+    }
+
+    /**
+     * @expectedException \InvalidArgumentException
+     * @depends testCalendarQueryNoResult
+     */
+    function testCalendarQueryBadId() {
+
+        $abstract = new PDO($this->pdo);
+        $filters = [
+            'name'         => 'VCALENDAR',
+            'comp-filters' => [
+                [
+                    'name'           => 'VJOURNAL',
+                    'comp-filters'   => [],
+                    'prop-filters'   => [],
+                    'is-not-defined' => false,
+                    'time-range'     => null,
+                ],
+            ],
+            'prop-filters'   => [],
+            'is-not-defined' => false,
+            'time-range'     => null,
+        ];
+
+        $abstract->calendarQuery('bad-id', $filters);
 
     }
 
     function testCalendarQueryTodo() {
 
         $backend = new PDO($this->pdo);
-        $backend->createCalendarObject(1, "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject(1, "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $filters = [
             'name'         => 'VCALENDAR',
@@ -527,14 +732,14 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertEquals([
             "todo",
-        ], $backend->calendarQuery(1, $filters));
+        ], $backend->calendarQuery([1, 1], $filters));
 
     }
     function testCalendarQueryTodoNotMatch() {
 
         $backend = new PDO($this->pdo);
-        $backend->createCalendarObject(1, "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject(1, "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $filters = [
             'name'         => 'VCALENDAR',
@@ -561,15 +766,15 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         ];
 
         $this->assertEquals([
-        ], $backend->calendarQuery(1, $filters));
+        ], $backend->calendarQuery([1, 1], $filters));
 
     }
 
     function testCalendarQueryNoFilter() {
 
         $backend = new PDO($this->pdo);
-        $backend->createCalendarObject(1, "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject(1, "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $filters = [
             'name'           => 'VCALENDAR',
@@ -579,7 +784,7 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
             'time-range'     => null,
         ];
 
-        $result = $backend->calendarQuery(1, $filters);
+        $result = $backend->calendarQuery([1, 1], $filters);
         $this->assertTrue(in_array('todo', $result));
         $this->assertTrue(in_array('event', $result));
 
@@ -588,9 +793,9 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
     function testCalendarQueryTimeRange() {
 
         $backend = new PDO($this->pdo);
-        $backend->createCalendarObject(1, "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject(1, "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART;VALUE=DATE:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject(1, "event2", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART;VALUE=DATE:20120103\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART;VALUE=DATE:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], "event2", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART;VALUE=DATE:20120103\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $filters = [
             'name'         => 'VCALENDAR',
@@ -613,15 +818,15 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertEquals([
             "event2",
-        ], $backend->calendarQuery(1, $filters));
+        ], $backend->calendarQuery([1, 1], $filters));
 
     }
     function testCalendarQueryTimeRangeNoEnd() {
 
         $backend = new PDO($this->pdo);
-        $backend->createCalendarObject(1, "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject(1, "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
-        $backend->createCalendarObject(1, "event2", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120103\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], "todo", "BEGIN:VCALENDAR\r\nBEGIN:VTODO\r\nEND:VTODO\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], "event", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120101\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $backend->createCalendarObject([1, 1], "event2", "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nDTSTART:20120103\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $filters = [
             'name'         => 'VCALENDAR',
@@ -644,7 +849,7 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertEquals([
             "event2",
-        ], $backend->calendarQuery(1, $filters));
+        ], $backend->calendarQuery([1, 1], $filters));
 
     }
 
@@ -694,6 +899,22 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         ], $result);
     }
 
+    /**
+     * @depends testGetChanges
+     * @expectedException \InvalidArgumentException
+     */
+    function testGetChangesBadId() {
+
+        $backend = new PDO($this->pdo);
+        $id = $backend->createCalendar(
+            'principals/user1',
+            'bla',
+            []
+        );
+        $backend->getChangesForCalendar('bad-id', null, 1);
+
+    }
+
     function testCreateSubscriptions() {
 
         $props = [
@@ -862,6 +1083,9 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $result = $backend->getSchedulingObject('principals/user1', 'schedule1.ics');
         foreach ($expected as $k => $v) {
             $this->assertArrayHasKey($k, $result);
+            if (is_resource($result[$k])) {
+                $result[$k] = stream_get_contents($result[$k]);
+            }
             $this->assertEquals($v, $result[$k]);
         }
 
@@ -870,6 +1094,9 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(1, count($results));
         $result = $results[0];
         foreach ($expected as $k => $v) {
+            if (is_resource($result[$k])) {
+                $result[$k] = stream_get_contents($result[$k]);
+            }
             $this->assertEquals($v, $result[$k]);
         }
 
@@ -880,4 +1107,325 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
     }
 
+    function testGetInvites() {
+
+        $backend = new PDO($this->pdo);
+
+        // creating a new calendar
+        $backend->createCalendar('principals/user1', 'somerandomid', []);
+        $calendar = $backend->getCalendarsForUser('principals/user1')[0];
+
+        $result = $backend->getInvites($calendar['id']);
+        $expected = [
+            new Sharee([
+                'href'         => 'principals/user1',
+                'principal'    => 'principals/user1',
+                'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
+                'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
+            ])
+        ];
+
+        $this->assertEquals($expected, $result);
+
+    }
+
+    /**
+     * @depends testGetInvites
+     * @expectedException \InvalidArgumentException
+     */
+    function testGetInvitesBadId() {
+
+        $backend = new PDO($this->pdo);
+
+        // creating a new calendar
+        $backend->createCalendar('principals/user1', 'somerandomid', []);
+        $calendar = $backend->getCalendarsForUser('principals/user1')[0];
+
+        $backend->getInvites('bad-id');
+
+    }
+
+    /**
+     * @depends testCreateCalendarAndFetch
+     */
+    function testUpdateInvites() {
+
+        $backend = new PDO($this->pdo);
+
+        // creating a new calendar
+        $backend->createCalendar('principals/user1', 'somerandomid', []);
+        $calendar = $backend->getCalendarsForUser('principals/user1')[0];
+
+        $ownerSharee = new Sharee([
+            'href'         => 'principals/user1',
+            'principal'    => 'principals/user1',
+            'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
+            'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
+        ]);
+
+        // Add a new invite
+        $backend->updateInvites(
+            $calendar['id'],
+            [
+                new Sharee([
+                    'href'         => 'mailto:user@example.org',
+                    'principal'    => 'principals/user2',
+                    'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+                    'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
+                    'properties'   => ['{DAV:}displayname' => 'User 2'],
+                ])
+            ]
+        );
+
+        $result = $backend->getInvites($calendar['id']);
+        $expected = [
+            $ownerSharee,
+            new Sharee([
+                'href'         => 'mailto:user@example.org',
+                'principal'    => 'principals/user2',
+                'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+                'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
+                'properties'   => [
+                    '{DAV:}displayname' => 'User 2',
+                ],
+            ])
+        ];
+        $this->assertEquals($expected, $result);
+
+        // Checking calendar_instances too
+        $expectedCalendar = [
+            'id'                                     => [1,2],
+            'principaluri'                           => 'principals/user2',
+            '{http://calendarserver.org/ns/}getctag' => 'http://sabre.io/ns/sync/1',
+            '{http://sabredav.org/ns}sync-token'     => '1',
+            'share-access'                           => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+            'read-only'                              => true,
+            'share-resource-uri'                     => '/ns/share/1',
+        ];
+        $calendars = $backend->getCalendarsForUser('principals/user2');
+
+        foreach ($expectedCalendar as $k => $v) {
+            $this->assertEquals(
+                $v,
+                $calendars[0][$k],
+                "Key " . $k . " in calendars array did not have the expected value."
+            );
+        }
+
+
+        // Updating an invite
+        $backend->updateInvites(
+            $calendar['id'],
+            [
+                new Sharee([
+                    'href'         => 'mailto:user@example.org',
+                    'principal'    => 'principals/user2',
+                    'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE,
+                    'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
+                ])
+            ]
+        );
+
+        $result = $backend->getInvites($calendar['id']);
+        $expected = [
+            $ownerSharee,
+            new Sharee([
+                'href'         => 'mailto:user@example.org',
+                'principal'    => 'principals/user2',
+                'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE,
+                'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
+                'properties'   => [
+                    '{DAV:}displayname' => 'User 2',
+                ],
+            ])
+        ];
+        $this->assertEquals($expected, $result);
+
+        // Removing an invite
+        $backend->updateInvites(
+            $calendar['id'],
+            [
+                new Sharee([
+                    'href'         => 'mailto:user@example.org',
+                    'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_NOACCESS,
+                ])
+            ]
+        );
+
+        $result = $backend->getInvites($calendar['id']);
+        $expected = [
+            $ownerSharee
+        ];
+        $this->assertEquals($expected, $result);
+
+        // Preventing the owner share from being removed
+        $backend->updateInvites(
+            $calendar['id'],
+            [
+                new Sharee([
+                    'href'         => 'principals/user2',
+                    'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_NOACCESS,
+                ])
+            ]
+        );
+
+        $result = $backend->getInvites($calendar['id']);
+        $expected = [
+            new Sharee([
+                'href'         => 'principals/user1',
+                'principal'    => 'principals/user1',
+                'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
+                'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
+            ]),
+        ];
+        $this->assertEquals($expected, $result);
+
+    }
+
+    /**
+     * @depends testUpdateInvites
+     * @expectedException \InvalidArgumentException
+     */
+    function testUpdateInvitesBadId() {
+
+        $backend = new PDO($this->pdo);
+        // Add a new invite
+        $backend->updateInvites(
+            'bad-id',
+            []
+        );
+
+    }
+
+    /**
+     * @depends testUpdateInvites
+     */
+    function testUpdateInvitesNoPrincipal() {
+
+        $backend = new PDO($this->pdo);
+
+        // creating a new calendar
+        $backend->createCalendar('principals/user1', 'somerandomid', []);
+        $calendar = $backend->getCalendarsForUser('principals/user1')[0];
+
+        $ownerSharee = new Sharee([
+            'href'         => 'principals/user1',
+            'principal'    => 'principals/user1',
+            'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
+            'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
+        ]);
+
+        // Add a new invite
+        $backend->updateInvites(
+            $calendar['id'],
+            [
+                new Sharee([
+                    'href'         => 'mailto:user@example.org',
+                    'principal'    => null,
+                    'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+                    'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
+                    'properties'   => ['{DAV:}displayname' => 'User 2'],
+                ])
+            ]
+        );
+
+        $result = $backend->getInvites($calendar['id']);
+        $expected = [
+            $ownerSharee,
+            new Sharee([
+                'href'         => 'mailto:user@example.org',
+                'principal'    => null,
+                'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+                'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_INVALID,
+                'properties'   => [
+                    '{DAV:}displayname' => 'User 2',
+                ],
+            ])
+        ];
+        $this->assertEquals($expected, $result, null, 0.0, 10, true); // Last argument is $canonicalize = true, which allows us to compare, ignoring the order, because it's different between MySQL and Sqlite.
+
+    }
+
+    /**
+     * @depends testUpdateInvites
+     */
+    function testDeleteSharedCalendar() {
+
+        $backend = new PDO($this->pdo);
+
+        // creating a new calendar
+        $backend->createCalendar('principals/user1', 'somerandomid', []);
+        $calendar = $backend->getCalendarsForUser('principals/user1')[0];
+
+        $ownerSharee = new Sharee([
+            'href'         => 'principals/user1',
+            'principal'    => 'principals/user1',
+            'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
+            'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
+        ]);
+
+        // Add a new invite
+        $backend->updateInvites(
+            $calendar['id'],
+            [
+                new Sharee([
+                    'href'         => 'mailto:user@example.org',
+                    'principal'    => 'principals/user2',
+                    'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+                    'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
+                    'properties'   => ['{DAV:}displayname' => 'User 2'],
+                ])
+            ]
+        );
+
+        $expectedCalendar = [
+            'id'                                     => [1,2],
+            'principaluri'                           => 'principals/user2',
+            '{http://calendarserver.org/ns/}getctag' => 'http://sabre.io/ns/sync/1',
+            '{http://sabredav.org/ns}sync-token'     => '1',
+            'share-access'                           => \Sabre\DAV\Sharing\Plugin::ACCESS_READ,
+            'read-only'                              => true,
+            'share-resource-uri'                     => '/ns/share/1',
+        ];
+        $calendars = $backend->getCalendarsForUser('principals/user2');
+
+        foreach ($expectedCalendar as $k => $v) {
+            $this->assertEquals(
+                $v,
+                $calendars[0][$k],
+                "Key " . $k . " in calendars array did not have the expected value."
+            );
+        }
+
+        // Removing the shared calendar.
+        $backend->deleteCalendar($calendars[0]['id']);
+
+        $this->assertEquals(
+            [],
+            $backend->getCalendarsForUser('principals/user2')
+        );
+
+        $result = $backend->getInvites($calendar['id']);
+        $expected = [
+            new Sharee([
+                'href'         => 'principals/user1',
+                'principal'    => 'principals/user1',
+                'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER,
+                'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_ACCEPTED,
+            ]),
+        ];
+        $this->assertEquals($expected, $result);
+
+    }
+
+    /**
+     * @expectedException \Sabre\DAV\Exception\NotImplemented
+     */
+    function testSetPublishStatus() {
+
+        $backend = new PDO($this->pdo);
+        $backend->setPublishStatus([1, 1], true);
+
+    }
+
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/Mock.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/Mock.php
index 4412e5531..d4dcc07dc 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/Mock.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/Mock.php
@@ -82,6 +82,46 @@ class Mock extends AbstractBackend {
     }
 
     /**
+     * Updates properties for a calendar.
+     *
+     * The list of mutations is stored in a Sabre\DAV\PropPatch object.
+     * To do the actual updates, you must tell this object which properties
+     * you're going to process with the handle() method.
+     *
+     * Calling the handle method is like telling the PropPatch object "I
+     * promise I can handle updating this property".
+     *
+     * Read the PropPatch documentation for more info and examples.
+     *
+     * @param mixed $calendarId
+     * @param \Sabre\DAV\PropPatch $propPatch
+     * @return void
+     */
+    function updateCalendar($calendarId, \Sabre\DAV\PropPatch $propPatch) {
+
+        $propPatch->handleRemaining(function($props) use ($calendarId) {
+
+            foreach ($this->calendars as $k => $calendar) {
+
+                if ($calendar['id'] === $calendarId) {
+                    foreach ($props as $propName => $propValue) {
+                        if (is_null($propValue)) {
+                            unset($this->calendars[$k][$propName]);
+                        } else {
+                            $this->calendars[$k][$propName] = $propValue;
+                        }
+                    }
+                    return true;
+
+                }
+
+            }
+
+        });
+
+    }
+
+    /**
      * Delete a calendar and all it's objects
      *
      * @param string $calendarId
@@ -139,18 +179,22 @@ class Mock extends AbstractBackend {
      * Returns information from a single calendar object, based on it's object
      * uri.
      *
+     * The object uri is only the basename, or filename and not a full path.
+     *
      * The returned array must have the same keys as getCalendarObjects. The
      * 'calendardata' object is required here though, while it's not required
      * for getCalendarObjects.
      *
-     * @param string $calendarId
+     * This method must return null if the object did not exist.
+     *
+     * @param mixed $calendarId
      * @param string $objectUri
-     * @return array
+     * @return array|null
      */
     function getCalendarObject($calendarId, $objectUri) {
 
         if (!isset($this->calendarData[$calendarId][$objectUri])) {
-            throw new DAV\Exception\NotFound('Object could not be found');
+            return null;
         }
         $object = $this->calendarData[$calendarId][$objectUri];
         $object['calendarid'] = $calendarId;
@@ -207,8 +251,7 @@ class Mock extends AbstractBackend {
      */
     function deleteCalendarObject($calendarId, $objectUri) {
 
-        throw new Exception('Not implemented');
-
+        unset($this->calendarData[$calendarId][$objectUri]);
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOMySQLTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOMySQLTest.php
index c215ca171..e068ff1e7 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOMySQLTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOMySQLTest.php
@@ -2,38 +2,8 @@
 
 namespace Sabre\CalDAV\Backend;
 
-require_once 'Sabre/TestUtil.php';
-require_once 'Sabre/CalDAV/TestUtil.php';
-require_once 'Sabre/CalDAV/Backend/AbstractPDOTest.php';
-
 class PDOMySQLTest extends AbstractPDOTest {
 
-    function setup() {
-
-        if (!SABRE_HASMYSQL) $this->markTestSkipped('MySQL driver is not available, or not properly configured');
-        $pdo = \Sabre\TestUtil::getMySQLDB();
-        if (!$pdo) $this->markTestSkipped('Could not connect to mysql database');
-
-        $pdo->query('DROP TABLE IF EXISTS calendarobjects, calendars, calendarchanges, calendarsubscriptions, schedulingobjects');
-
-        $queries = explode(
-            ';',
-            file_get_contents(__DIR__ . '/../../../../examples/sql/mysql.calendars.sql')
-        );
-
-        foreach ($queries as $query) {
-            $query = trim($query, " \r\n\t");
-            if ($query)
-                $pdo->exec($query);
-        }
-        $this->pdo = $pdo;
-
-    }
-
-    function teardown() {
-
-        $this->pdo = null;
-
-    }
+    public $driver = 'mysql';
 
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOSqliteTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOSqliteTest.php
index 4074259f2..90ad5a171 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOSqliteTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Backend/PDOSqliteTest.php
@@ -2,36 +2,8 @@
 
 namespace Sabre\CalDAV\Backend;
 
-use Sabre\CalDAV;
-
-require_once 'Sabre/CalDAV/Backend/AbstractPDOTest.php';
-
 class PDOSqliteTest extends AbstractPDOTest {
 
-    function setup() {
-
-        if (!SABRE_HASSQLITE) $this->markTestSkipped('SQLite driver is not available');
-
-        if (file_exists(SABRE_TEMPDIR . '/testdb.sqlite'))
-            unlink(SABRE_TEMPDIR . '/testdb.sqlite');
-
-        $pdo = new \PDO('sqlite:' . SABRE_TEMPDIR . '/testdb.sqlite');
-        $pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
-
-        // Yup this is definitely not 'fool proof', but good enough for now.
-        $queries = explode(';', file_get_contents(__DIR__ . '/../../../../examples/sql/sqlite.calendars.sql'));
-        foreach ($queries as $query) {
-            $pdo->exec($query);
-        }
-        $this->pdo = $pdo;
-
-    }
-
-    function teardown() {
-
-        $this->pdo = null;
-        unlink(SABRE_TEMPDIR . '/testdb.sqlite');
-
-    }
+    public $driver = 'sqlite';
 
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarObjectTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarObjectTest.php
index 9fc1eee4c..0d98922ff 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarObjectTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarObjectTest.php
@@ -1,7 +1,6 @@
 <?php
 
 namespace Sabre\CalDAV;
-use Sabre\DAVACL;
 
 require_once 'Sabre/CalDAV/TestUtil.php';
 
@@ -19,11 +18,10 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
 
     function setup() {
 
-        if (!SABRE_HASSQLITE) $this->markTestSkipped('SQLite driver is not available');
         $this->backend = TestUtil::getBackend();
 
         $calendars = $this->backend->getCalendarsForUser('principals/user1');
-        $this->assertEquals(2,count($calendars));
+        $this->assertEquals(2, count($calendars));
         $this->calendar = new Calendar($this->backend, $calendars[0]);
 
     }
@@ -40,10 +38,10 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
         $children = $this->calendar->getChildren();
         $this->assertTrue($children[0] instanceof CalendarObject);
 
-        $this->assertInternalType('string',$children[0]->getName());
-        $this->assertInternalType('string',$children[0]->get());
-        $this->assertInternalType('string',$children[0]->getETag());
-        $this->assertEquals('text/calendar; charset=utf-8; component=vevent', $children[0]->getContentType());
+        $this->assertInternalType('string', $children[0]->getName());
+        $this->assertInternalType('string', $children[0]->get());
+        $this->assertInternalType('string', $children[0]->getETag());
+        $this->assertEquals('text/calendar; charset=utf-8', $children[0]->getContentType());
 
     }
 
@@ -53,9 +51,9 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
     function testInvalidArg1() {
 
         $obj = new CalendarObject(
-            new Backend\Mock(array(),array()),
-            array(),
-            array()
+            new Backend\Mock([], []),
+            [],
+            []
         );
 
     }
@@ -66,9 +64,9 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
     function testInvalidArg2() {
 
         $obj = new CalendarObject(
-            new Backend\Mock(array(),array()),
-            array(),
-            array('calendarid' => '1')
+            new Backend\Mock([], []),
+            [],
+            ['calendarid' => '1']
         );
 
     }
@@ -96,7 +94,7 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
         $this->assertTrue($children[0] instanceof CalendarObject);
         $newData = TestUtil::getTestCalendarData();
 
-        $stream = fopen('php://temp','r+');
+        $stream = fopen('php://temp', 'r+');
         fwrite($stream, $newData);
         rewind($stream);
         $children[0]->put($stream);
@@ -117,7 +115,7 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
         $obj->delete();
 
         $children2 =  $this->calendar->getChildren();
-        $this->assertEquals(count($children)-1, count($children2));
+        $this->assertEquals(count($children) - 1, count($children2));
 
     }
 
@@ -132,7 +130,7 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
         $obj = $children[0];
 
         $lastMod = $obj->getLastModified();
-        $this->assertTrue(is_int($lastMod) || ctype_digit($lastMod));
+        $this->assertTrue(is_int($lastMod) || ctype_digit($lastMod) || is_null($lastMod));
 
     }
 
@@ -173,33 +171,33 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
 
     function testGetACL() {
 
-        $expected = array(
-            array(
+        $expected = [
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/user1',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/user1/calendar-proxy-write',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/user1/calendar-proxy-read',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}write',
                 'principal' => 'principals/user1',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}write',
                 'principal' => 'principals/user1/calendar-proxy-write',
                 'protected' => true,
-            ),
-        );
+            ],
+        ];
 
         $children = $this->calendar->getChildren();
         $this->assertTrue($children[0] instanceof CalendarObject);
@@ -213,40 +211,30 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
 
         $backend = new Backend\Mock([], []);
         $calendarObject = new CalendarObject($backend, ['principaluri' => 'principals/user1'], ['calendarid' => 1, 'uri' => 'foo']);
-        $expected = array(
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/user1',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
+        $expected = [
+            [
+                'privilege' => '{DAV:}all',
                 'principal' => 'principals/user1',
                 'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
+            ],
+            [
+                'privilege' => '{DAV:}all',
                 'principal' => 'principals/user1/calendar-proxy-write',
                 'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => 'principals/user1/calendar-proxy-write',
-                'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/user1/calendar-proxy-read',
                 'protected' => true,
-            ),
-        );
+            ],
+        ];
         $this->assertEquals($expected, $calendarObject->getACL());
 
 
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\MethodNotAllowed
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
     function testSetACL() {
 
@@ -254,7 +242,7 @@ class CalendarObjectTest extends \PHPUnit_Framework_TestCase {
         $this->assertTrue($children[0] instanceof CalendarObject);
 
         $obj = $children[0];
-        $obj->setACL(array());
+        $obj->setACL([]);
 
     }
 
@@ -306,15 +294,15 @@ END:VCALENDAR";
 
     function testGetRefetch() {
 
-        $backend = new Backend\Mock(array(), array(
-            1 => array(
-                'foo' => array(
+        $backend = new Backend\Mock([], [
+            1 => [
+                'foo' => [
                     'calendardata' => 'foo',
-                    'uri' => 'foo'
-                ),
-            )
-        ));
-        $obj = new CalendarObject($backend, array('id' => 1), array('uri' => 'foo'));
+                    'uri'          => 'foo'
+                ],
+            ]
+        ]);
+        $obj = new CalendarObject($backend, ['id' => 1], ['uri' => 'foo']);
 
         $this->assertEquals('foo', $obj->get());
 
@@ -322,15 +310,15 @@ END:VCALENDAR";
 
     function testGetEtag1() {
 
-        $objectInfo = array(
+        $objectInfo = [
             'calendardata' => 'foo',
-            'uri' => 'foo',
-            'etag' => 'bar',
-            'calendarid' => 1
-        );
+            'uri'          => 'foo',
+            'etag'         => 'bar',
+            'calendarid'   => 1
+        ];
 
-        $backend = new Backend\Mock(array(), array());
-        $obj = new CalendarObject($backend, array(), $objectInfo);
+        $backend = new Backend\Mock([], []);
+        $obj = new CalendarObject($backend, [], $objectInfo);
 
         $this->assertEquals('bar', $obj->getETag());
 
@@ -338,14 +326,14 @@ END:VCALENDAR";
 
     function testGetEtag2() {
 
-        $objectInfo = array(
+        $objectInfo = [
             'calendardata' => 'foo',
-            'uri' => 'foo',
-            'calendarid' => 1
-        );
+            'uri'          => 'foo',
+            'calendarid'   => 1
+        ];
 
-        $backend = new Backend\Mock(array(), array());
-        $obj = new CalendarObject($backend, array(), $objectInfo);
+        $backend = new Backend\Mock([], []);
+        $obj = new CalendarObject($backend, [], $objectInfo);
 
         $this->assertEquals('"' . md5('foo') . '"', $obj->getETag());
 
@@ -353,42 +341,42 @@ END:VCALENDAR";
 
     function testGetSupportedPrivilegesSet() {
 
-        $objectInfo = array(
+        $objectInfo = [
             'calendardata' => 'foo',
-            'uri' => 'foo',
-            'calendarid' => 1
-        );
+            'uri'          => 'foo',
+            'calendarid'   => 1
+        ];
 
-        $backend = new Backend\Mock(array(), array());
-        $obj = new CalendarObject($backend, array(), $objectInfo);
+        $backend = new Backend\Mock([], []);
+        $obj = new CalendarObject($backend, [], $objectInfo);
         $this->assertNull($obj->getSupportedPrivilegeSet());
 
     }
 
     function testGetSize1() {
 
-        $objectInfo = array(
+        $objectInfo = [
             'calendardata' => 'foo',
-            'uri' => 'foo',
-            'calendarid' => 1
-        );
+            'uri'          => 'foo',
+            'calendarid'   => 1
+        ];
 
-        $backend = new Backend\Mock(array(), array());
-        $obj = new CalendarObject($backend, array(), $objectInfo);
+        $backend = new Backend\Mock([], []);
+        $obj = new CalendarObject($backend, [], $objectInfo);
         $this->assertEquals(3, $obj->getSize());
 
     }
 
     function testGetSize2() {
 
-        $objectInfo = array(
-            'uri' => 'foo',
+        $objectInfo = [
+            'uri'        => 'foo',
             'calendarid' => 1,
-            'size' => 4,
-        );
+            'size'       => 4,
+        ];
 
-        $backend = new Backend\Mock(array(), array());
-        $obj = new CalendarObject($backend, array(), $objectInfo);
+        $backend = new Backend\Mock([], []);
+        $obj = new CalendarObject($backend, [], $objectInfo);
         $this->assertEquals(4, $obj->getSize());
 
     }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryVAlarmTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryVAlarmTest.php
index 9de24d3aa..ca06d8ffa 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryVAlarmTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryVAlarmTest.php
@@ -26,32 +26,32 @@ class CalendarQueryVAlarmTest extends \PHPUnit_Framework_TestCase {
 
         $vcalendar->add($vevent);
 
-        $filter = array(
-            'name' => 'VCALENDAR',
+        $filter = [
+            'name'           => 'VCALENDAR',
             'is-not-defined' => false,
-            'time-range' => null,
-            'prop-filters' => array(),
-            'comp-filters' => array(
-                array(
-                    'name' => 'VEVENT',
+            'time-range'     => null,
+            'prop-filters'   => [],
+            'comp-filters'   => [
+                [
+                    'name'           => 'VEVENT',
                     'is-not-defined' => false,
-                    'time-range' => null,
-                    'prop-filters' => array(),
-                    'comp-filters' => array(
-                        array(
-                            'name' => 'VALARM',
+                    'time-range'     => null,
+                    'prop-filters'   => [],
+                    'comp-filters'   => [
+                        [
+                            'name'           => 'VALARM',
                             'is-not-defined' => false,
-                            'prop-filters' => array(),
-                            'comp-filters' => array(),
-                            'time-range' => array(
+                            'prop-filters'   => [],
+                            'comp-filters'   => [],
+                            'time-range'     => [
                                 'start' => new \DateTime('2012-05-10'),
-                                'end' => new \DateTime('2012-05-20'),
-                            ),
-                        ),
-                    ),
-                ),
-            ),
-        );
+                                'end'   => new \DateTime('2012-05-20'),
+                            ],
+                        ],
+                    ],
+                ],
+            ],
+        ];
 
         $validator = new CalendarQueryValidator();
         $this->assertTrue($validator->validate($vcalendar, $filter));
@@ -87,32 +87,32 @@ class CalendarQueryVAlarmTest extends \PHPUnit_Framework_TestCase {
 
         $vcalendar->add($vevent);
 
-        $filter = array(
-            'name' => 'VCALENDAR',
+        $filter = [
+            'name'           => 'VCALENDAR',
             'is-not-defined' => false,
-            'time-range' => null,
-            'prop-filters' => array(),
-            'comp-filters' => array(
-                array(
-                    'name' => 'VEVENT',
+            'time-range'     => null,
+            'prop-filters'   => [],
+            'comp-filters'   => [
+                [
+                    'name'           => 'VEVENT',
                     'is-not-defined' => false,
-                    'time-range' => null,
-                    'prop-filters' => array(),
-                    'comp-filters' => array(
-                        array(
-                            'name' => 'VALARM',
+                    'time-range'     => null,
+                    'prop-filters'   => [],
+                    'comp-filters'   => [
+                        [
+                            'name'           => 'VALARM',
                             'is-not-defined' => false,
-                            'prop-filters' => array(),
-                            'comp-filters' => array(),
-                            'time-range' => array(
+                            'prop-filters'   => [],
+                            'comp-filters'   => [],
+                            'time-range'     => [
                                 'start' => new \DateTime('2011-12-10'),
-                                'end' => new \DateTime('2011-12-20'),
-                            ),
-                        ),
-                    ),
-                ),
-            ),
-        );
+                                'end'   => new \DateTime('2011-12-20'),
+                            ],
+                        ],
+                    ],
+                ],
+            ],
+        ];
 
         $validator = new CalendarQueryValidator();
         $this->assertTrue($validator->validate($vcalendar, $filter));
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryValidatorTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryValidatorTest.php
index 9822e82e2..4c2558a9b 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryValidatorTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarQueryValidatorTest.php
@@ -1,8 +1,8 @@
 <?php
 
 namespace Sabre\CalDAV;
+
 use Sabre\VObject;
-use Sabre\DAV;
 
 class CalendarQueryValidatorTest extends \PHPUnit_Framework_TestCase {
 
@@ -29,17 +29,17 @@ ICS;
 
         // Wrapping filter in a VCALENDAR component filter, as this is always
         // there anyway.
-        $filters = array(
-            'name' => 'VCALENDAR',
-            'comp-filters' => array($filters),
-            'prop-filters' => array(),
+        $filters = [
+            'name'           => 'VCALENDAR',
+            'comp-filters'   => [$filters],
+            'prop-filters'   => [],
             'is-not-defined' => false,
-            'time-range' => null,
-        );
+            'time-range'     => null,
+        ];
 
         $vObject = VObject\Reader::read($icalObject);
 
-        switch($outcome) {
+        switch ($outcome) {
             case 0 :
                 $this->assertFalse($validator->validate($vObject, $filters));
                 break;
@@ -392,13 +392,13 @@ END:VEVENT
 END:VCALENDAR
 yow;
 
-        $filter1 = array(
-            'name' => 'VEVENT',
-            'comp-filters' => array(),
-            'prop-filters' => array(),
+        $filter1 = [
+            'name'           => 'VEVENT',
+            'comp-filters'   => [],
+            'prop-filters'   => [],
             'is-not-defined' => false,
-            'time-range' => null,
-        );
+            'time-range'     => null,
+        ];
         $filter2 = $filter1;
         $filter2['name'] = 'VTODO';
 
@@ -410,25 +410,25 @@ yow;
         $filter4['is-not-defined'] = true;
 
         $filter5 = $filter1;
-        $filter5['comp-filters'] = array(
-            array(
-                'name' => 'VALARM',
+        $filter5['comp-filters'] = [
+            [
+                'name'           => 'VALARM',
                 'is-not-defined' => false,
-                'comp-filters' => array(),
-                'prop-filters' => array(),
-                'time-range' => null,
-            ),
-        );
+                'comp-filters'   => [],
+                'prop-filters'   => [],
+                'time-range'     => null,
+            ],
+        ];
         $filter6 = $filter1;
-        $filter6['prop-filters'] = array(
-            array(
-                'name' => 'SUMMARY',
+        $filter6['prop-filters'] = [
+            [
+                'name'           => 'SUMMARY',
                 'is-not-defined' => false,
-                'param-filters' => array(),
-                'time-range' => null,
-                'text-match' => null,
-            ),
-        );
+                'param-filters'  => [],
+                'time-range'     => null,
+                'text-match'     => null,
+            ],
+        ];
         $filter7 = $filter6;
         $filter7['prop-filters'][0]['name'] = 'DESCRIPTION';
 
@@ -443,21 +443,21 @@ yow;
 
         // Param filters
         $filter11 = $filter1;
-        $filter11['prop-filters'] = array(
-            array(
-                'name' => 'DTSTART',
+        $filter11['prop-filters'] = [
+            [
+                'name'           => 'DTSTART',
                 'is-not-defined' => false,
-                'param-filters' => array(
-                    array(
-                        'name' => 'VALUE',
+                'param-filters'  => [
+                    [
+                        'name'           => 'VALUE',
                         'is-not-defined' => false,
-                        'text-match' => null,
-                    ),
-                ),
+                        'text-match'     => null,
+                    ],
+                ],
                 'time-range' => null,
                 'text-match' => null,
-            ),
-        );
+            ],
+        ];
 
         $filter12 = $filter11;
         $filter12['prop-filters'][0]['param-filters'][0]['name'] = 'TZID';
@@ -470,11 +470,11 @@ yow;
 
         // Param text filter
         $filter15 = $filter11;
-        $filter15['prop-filters'][0]['param-filters'][0]['text-match'] = array(
-            'collation' => 'i;ascii-casemap',
-            'value' => 'dAtE',
+        $filter15['prop-filters'][0]['param-filters'][0]['text-match'] = [
+            'collation'        => 'i;ascii-casemap',
+            'value'            => 'dAtE',
             'negate-condition' => false,
-        );
+        ];
         $filter16 = $filter15;
         $filter16['prop-filters'][0]['param-filters'][0]['text-match']['collation'] = 'i;octet';
 
@@ -487,31 +487,31 @@ yow;
 
         // prop + text
         $filter19 = $filter5;
-        $filter19['comp-filters'][0]['prop-filters'] = array(
-            array(
-                'name' => 'action',
+        $filter19['comp-filters'][0]['prop-filters'] = [
+            [
+                'name'           => 'action',
                 'is-not-defined' => false,
-                'time-range' => null,
-                'param-filters' => array(),
-                'text-match' => array(
-                    'collation' => 'i;ascii-casemap',
-                    'value' => 'display',
+                'time-range'     => null,
+                'param-filters'  => [],
+                'text-match'     => [
+                    'collation'        => 'i;ascii-casemap',
+                    'value'            => 'display',
                     'negate-condition' => false,
-                ),
-            ),
-        );
+                ],
+            ],
+        ];
 
         // Time range
-        $filter20 = array(
-            'name' => 'VEVENT',
-            'comp-filters' => array(),
-            'prop-filters' => array(),
+        $filter20 = [
+            'name'           => 'VEVENT',
+            'comp-filters'   => [],
+            'prop-filters'   => [],
             'is-not-defined' => false,
-            'time-range' => array(
+            'time-range'     => [
                'start' => new \DateTime('2011-01-01 10:00:00', new \DateTimeZone('GMT')),
-               'end' => new \DateTime('2011-01-01 13:00:00', new \DateTimeZone('GMT')),
-            ),
-        );
+               'end'   => new \DateTime('2011-01-01 13:00:00', new \DateTimeZone('GMT')),
+            ],
+        ];
         // Time range, no end date
         $filter21 = $filter20;
         $filter21['time-range']['end'] = null;
@@ -522,105 +522,105 @@ yow;
 
         // Time range, other dates
         $filter23 = $filter20;
-        $filter23['time-range'] = array(
+        $filter23['time-range'] = [
            'start' => new \DateTime('2011-02-01 10:00:00', new \DateTimeZone('GMT')),
-           'end' => new \DateTime('2011-02-01 13:00:00', new \DateTimeZone('GMT')),
-        );
+           'end'   => new \DateTime('2011-02-01 13:00:00', new \DateTimeZone('GMT')),
+        ];
         // Time range
-        $filter24 = array(
-            'name' => 'VTODO',
-            'comp-filters' => array(),
-            'prop-filters' => array(),
+        $filter24 = [
+            'name'           => 'VTODO',
+            'comp-filters'   => [],
+            'prop-filters'   => [],
             'is-not-defined' => false,
-            'time-range' => array(
+            'time-range'     => [
                'start' => new \DateTime('2011-01-01 12:45:00', new \DateTimeZone('GMT')),
-               'end' => new \DateTime('2011-01-01 13:15:00', new \DateTimeZone('GMT')),
-            ),
-        );
+               'end'   => new \DateTime('2011-01-01 13:15:00', new \DateTimeZone('GMT')),
+            ],
+        ];
         // Time range, other dates (1 month in the future)
         $filter25 = $filter24;
-        $filter25['time-range'] = array(
+        $filter25['time-range'] = [
            'start' => new \DateTime('2011-02-01 10:00:00', new \DateTimeZone('GMT')),
-           'end' => new \DateTime('2011-02-01 13:00:00', new \DateTimeZone('GMT')),
-        );
+           'end'   => new \DateTime('2011-02-01 13:00:00', new \DateTimeZone('GMT')),
+        ];
         $filter26 = $filter24;
-        $filter26['time-range'] = array(
+        $filter26['time-range'] = [
            'start' => new \DateTime('2011-01-01 11:45:00', new \DateTimeZone('GMT')),
-           'end' => new \DateTime('2011-01-01 12:15:00', new \DateTimeZone('GMT')),
-       );
+           'end'   => new \DateTime('2011-01-01 12:15:00', new \DateTimeZone('GMT')),
+       ];
 
         // Time range for VJOURNAL
-        $filter27 = array(
-            'name' => 'VJOURNAL',
-            'comp-filters' => array(),
-            'prop-filters' => array(),
+        $filter27 = [
+            'name'           => 'VJOURNAL',
+            'comp-filters'   => [],
+            'prop-filters'   => [],
             'is-not-defined' => false,
-            'time-range' => array(
+            'time-range'     => [
                'start' => new \DateTime('2011-01-01 12:45:00', new \DateTimeZone('GMT')),
-               'end' => new \DateTime('2011-01-01 13:15:00', new \DateTimeZone('GMT')),
-            ),
-        );
+               'end'   => new \DateTime('2011-01-01 13:15:00', new \DateTimeZone('GMT')),
+            ],
+        ];
         $filter28 = $filter27;
-        $filter28['time-range'] = array(
+        $filter28['time-range'] = [
            'start' => new \DateTime('2011-01-01 11:45:00', new \DateTimeZone('GMT')),
-           'end' => new \DateTime('2011-01-01 12:15:00', new \DateTimeZone('GMT')),
-        );
+           'end'   => new \DateTime('2011-01-01 12:15:00', new \DateTimeZone('GMT')),
+        ];
         // Time range for VFREEBUSY
-        $filter29 = array(
-            'name' => 'VFREEBUSY',
-            'comp-filters' => array(),
-            'prop-filters' => array(),
+        $filter29 = [
+            'name'           => 'VFREEBUSY',
+            'comp-filters'   => [],
+            'prop-filters'   => [],
             'is-not-defined' => false,
-            'time-range' => array(
+            'time-range'     => [
                'start' => new \DateTime('2011-01-01 12:45:00', new \DateTimeZone('GMT')),
-               'end' => new \DateTime('2011-01-01 13:15:00', new \DateTimeZone('GMT')),
-            ),
-        );
+               'end'   => new \DateTime('2011-01-01 13:15:00', new \DateTimeZone('GMT')),
+            ],
+        ];
         // Time range filter on property
-        $filter30 = array(
-            'name' => 'VEVENT',
-            'comp-filters' => array(),
-            'prop-filters' => array(
-                array(
-                    'name' => 'DTSTART',
+        $filter30 = [
+            'name'         => 'VEVENT',
+            'comp-filters' => [],
+            'prop-filters' => [
+                [
+                    'name'           => 'DTSTART',
                     'is-not-defined' => false,
-                    'param-filters' => array(),
-                    'time-range' => array(
+                    'param-filters'  => [],
+                    'time-range'     => [
                        'start' => new \DateTime('2011-01-01 10:00:00', new \DateTimeZone('GMT')),
-                       'end' => new \DateTime('2011-01-01 13:00:00', new \DateTimeZone('GMT')),
-                   ),
+                       'end'   => new \DateTime('2011-01-01 13:00:00', new \DateTimeZone('GMT')),
+                   ],
                     'text-match' => null,
-               ),
-            ),
+               ],
+            ],
             'is-not-defined' => false,
-            'time-range' => null,
-        );
+            'time-range'     => null,
+        ];
 
         // Time range for alarm
-        $filter31 = array(
-            'name' => 'VEVENT',
-            'prop-filters' => array(),
-            'comp-filters' => array(
-                array(
-                    'name' => 'VALARM',
+        $filter31 = [
+            'name'         => 'VEVENT',
+            'prop-filters' => [],
+            'comp-filters' => [
+                [
+                    'name'           => 'VALARM',
                     'is-not-defined' => false,
-                    'comp-filters' => array(),
-                    'prop-filters' => array(),
-                    'time-range' => array(
+                    'comp-filters'   => [],
+                    'prop-filters'   => [],
+                    'time-range'     => [
                        'start' => new \DateTime('2011-01-01 10:45:00', new \DateTimeZone('GMT')),
-                       'end' => new \DateTime('2011-01-01 11:15:00', new \DateTimeZone('GMT')),
-                    ),
+                       'end'   => new \DateTime('2011-01-01 11:15:00', new \DateTimeZone('GMT')),
+                    ],
                     'text-match' => null,
-               ),
-            ),
+               ],
+            ],
             'is-not-defined' => false,
-            'time-range' => null,
-        );
+            'time-range'     => null,
+        ];
         $filter32 = $filter31;
-        $filter32['comp-filters'][0]['time-range'] = array(
+        $filter32['comp-filters'][0]['time-range'] = [
            'start' => new \DateTime('2011-01-01 11:45:00', new \DateTimeZone('GMT')),
-           'end' => new \DateTime('2011-01-01 12:15:00', new \DateTimeZone('GMT')),
-       );
+           'end'   => new \DateTime('2011-01-01 12:15:00', new \DateTimeZone('GMT')),
+       ];
 
         $filter33 = $filter31;
         $filter33['name'] = 'VTODO';
@@ -632,194 +632,194 @@ yow;
         $filter36['name'] = 'VJOURNAL';
 
         // Time range filter on non-datetime property
-        $filter37 = array(
-            'name' => 'VEVENT',
-            'comp-filters' => array(),
-            'prop-filters' => array(
-                array(
-                    'name' => 'SUMMARY',
+        $filter37 = [
+            'name'         => 'VEVENT',
+            'comp-filters' => [],
+            'prop-filters' => [
+                [
+                    'name'           => 'SUMMARY',
                     'is-not-defined' => false,
-                    'param-filters' => array(),
-                    'time-range' => array(
+                    'param-filters'  => [],
+                    'time-range'     => [
                        'start' => new \DateTime('2011-01-01 10:00:00', new \DateTimeZone('GMT')),
-                       'end' => new \DateTime('2011-01-01 13:00:00', new \DateTimeZone('GMT')),
-                   ),
+                       'end'   => new \DateTime('2011-01-01 13:00:00', new \DateTimeZone('GMT')),
+                   ],
                     'text-match' => null,
-               ),
-            ),
+               ],
+            ],
             'is-not-defined' => false,
-            'time-range' => null,
-        );
+            'time-range'     => null,
+        ];
 
-        $filter38 = array(
-            'name' => 'VEVENT',
-            'comp-filters' => array(),
-            'prop-filters' => array(),
+        $filter38 = [
+            'name'           => 'VEVENT',
+            'comp-filters'   => [],
+            'prop-filters'   => [],
             'is-not-defined' => false,
-            'time-range' => array(
+            'time-range'     => [
                 'start' => new \DateTime('2012-07-01 00:00:00', new \DateTimeZone('UTC')),
-                'end' => new \DateTime('2012-08-01 00:00:00', new \DateTimeZone('UTC')),
-            )
-        );
-        $filter39 = array(
-            'name' => 'VEVENT',
-            'comp-filters' => array(
-                array(
-                    'name' => 'VALARM',
-                    'comp-filters' => array(),
-                    'prop-filters' => array(),
+                'end'   => new \DateTime('2012-08-01 00:00:00', new \DateTimeZone('UTC')),
+            ]
+        ];
+        $filter39 = [
+            'name'         => 'VEVENT',
+            'comp-filters' => [
+                [
+                    'name'           => 'VALARM',
+                    'comp-filters'   => [],
+                    'prop-filters'   => [],
                     'is-not-defined' => false,
-                    'time-range' => array(
+                    'time-range'     => [
                         'start' => new \DateTime('2012-09-01 00:00:00', new \DateTimeZone('UTC')),
-                        'end' => new \DateTime('2012-10-01 00:00:00', new \DateTimeZone('UTC')),
-                    )
-                ),
-            ),
-            'prop-filters' => array(),
+                        'end'   => new \DateTime('2012-10-01 00:00:00', new \DateTimeZone('UTC')),
+                    ]
+                ],
+            ],
+            'prop-filters'   => [],
             'is-not-defined' => false,
-            'time-range' => null,
-        );
+            'time-range'     => null,
+        ];
 
-        return array(
+        return [
 
             // Component check
 
-            array($blob1, $filter1, 1),
-            array($blob1, $filter2, 0),
-            array($blob1, $filter3, 0),
-            array($blob1, $filter4, 1),
+            [$blob1, $filter1, 1],
+            [$blob1, $filter2, 0],
+            [$blob1, $filter3, 0],
+            [$blob1, $filter4, 1],
 
             // Subcomponent check (4)
-            array($blob1, $filter5, 0),
-            array($blob2, $filter5, 1),
+            [$blob1, $filter5, 0],
+            [$blob2, $filter5, 1],
 
             // Property checki (6)
-            array($blob1, $filter6, 1),
-            array($blob1, $filter7, 0),
-            array($blob1, $filter8, 0),
-            array($blob1, $filter9, 1),
+            [$blob1, $filter6, 1],
+            [$blob1, $filter7, 0],
+            [$blob1, $filter8, 0],
+            [$blob1, $filter9, 1],
 
             // Subcomponent + property (10)
-            array($blob2, $filter10, 1),
+            [$blob2, $filter10, 1],
 
             // Param filter (11)
-            array($blob3, $filter11, 1),
-            array($blob3, $filter12, 0),
-            array($blob3, $filter13, 0),
-            array($blob3, $filter14, 1),
+            [$blob3, $filter11, 1],
+            [$blob3, $filter12, 0],
+            [$blob3, $filter13, 0],
+            [$blob3, $filter14, 1],
 
             // Param + text (15)
-            array($blob3, $filter15, 1),
-            array($blob3, $filter16, 0),
-            array($blob3, $filter17, 0),
-            array($blob3, $filter18, 1),
+            [$blob3, $filter15, 1],
+            [$blob3, $filter16, 0],
+            [$blob3, $filter17, 0],
+            [$blob3, $filter18, 1],
 
             // Prop + text (19)
-            array($blob2, $filter19, 1),
+            [$blob2, $filter19, 1],
 
             // Incorrect object (vcard) (20)
-            array($blob4, $filter1, -1),
+            [$blob4, $filter1, -1],
 
             // Time-range for event (21)
-            array($blob5, $filter20, 1),
-            array($blob6, $filter20, 1),
-            array($blob7, $filter20, 1),
-            array($blob8, $filter20, 1),
+            [$blob5, $filter20, 1],
+            [$blob6, $filter20, 1],
+            [$blob7, $filter20, 1],
+            [$blob8, $filter20, 1],
 
-            array($blob5, $filter21, 1),
-            array($blob5, $filter22, 1),
+            [$blob5, $filter21, 1],
+            [$blob5, $filter22, 1],
 
-            array($blob5, $filter23, 0),
-            array($blob6, $filter23, 0),
-            array($blob7, $filter23, 0),
-            array($blob8, $filter23, 0),
+            [$blob5, $filter23, 0],
+            [$blob6, $filter23, 0],
+            [$blob7, $filter23, 0],
+            [$blob8, $filter23, 0],
 
             // Time-range for todo (31)
-            array($blob9, $filter24, 1),
-            array($blob9, $filter25, 0),
-            array($blob9, $filter26, 1),
-            array($blob10, $filter24, 1),
-            array($blob10, $filter25, 0),
-            array($blob10, $filter26, 1),
+            [$blob9, $filter24, 1],
+            [$blob9, $filter25, 0],
+            [$blob9, $filter26, 1],
+            [$blob10, $filter24, 1],
+            [$blob10, $filter25, 0],
+            [$blob10, $filter26, 1],
 
-            array($blob11, $filter24, 0),
-            array($blob11, $filter25, 0),
-            array($blob11, $filter26, 1),
+            [$blob11, $filter24, 0],
+            [$blob11, $filter25, 0],
+            [$blob11, $filter26, 1],
 
-            array($blob12, $filter24, 1),
-            array($blob12, $filter25, 0),
-            array($blob12, $filter26, 0),
+            [$blob12, $filter24, 1],
+            [$blob12, $filter25, 0],
+            [$blob12, $filter26, 0],
 
-            array($blob13, $filter24, 1),
-            array($blob13, $filter25, 0),
-            array($blob13, $filter26, 1),
+            [$blob13, $filter24, 1],
+            [$blob13, $filter25, 0],
+            [$blob13, $filter26, 1],
 
-            array($blob14, $filter24, 1),
-            array($blob14, $filter25, 0),
-            array($blob14, $filter26, 0),
+            [$blob14, $filter24, 1],
+            [$blob14, $filter25, 0],
+            [$blob14, $filter26, 0],
 
-            array($blob15, $filter24, 1),
-            array($blob15, $filter25, 1),
-            array($blob15, $filter26, 1),
+            [$blob15, $filter24, 1],
+            [$blob15, $filter25, 1],
+            [$blob15, $filter26, 1],
 
-            array($blob16, $filter24, 1),
-            array($blob16, $filter25, 1),
-            array($blob16, $filter26, 1),
+            [$blob16, $filter24, 1],
+            [$blob16, $filter25, 1],
+            [$blob16, $filter26, 1],
 
             // Time-range for journals (55)
-            array($blob17, $filter27, 0),
-            array($blob17, $filter28, 0),
-            array($blob18, $filter27, 0),
-            array($blob18, $filter28, 1),
-            array($blob19, $filter27, 1),
-            array($blob19, $filter28, 1),
+            [$blob17, $filter27, 0],
+            [$blob17, $filter28, 0],
+            [$blob18, $filter27, 0],
+            [$blob18, $filter28, 1],
+            [$blob19, $filter27, 1],
+            [$blob19, $filter28, 1],
 
             // Time-range for free-busy (61)
-            array($blob20, $filter29, -1),
+            [$blob20, $filter29, -1],
 
             // Time-range on property (62)
-            array($blob5, $filter30, 1),
-            array($blob3, $filter37, -1),
-            array($blob3, $filter30, 0),
+            [$blob5, $filter30, 1],
+            [$blob3, $filter37, -1],
+            [$blob3, $filter30, 0],
 
             // Time-range on alarm in vevent (65)
-            array($blob21, $filter31, 1),
-            array($blob21, $filter32, 0),
-            array($blob22, $filter31, 1),
-            array($blob22, $filter32, 0),
-            array($blob23, $filter31, 1),
-            array($blob23, $filter32, 0),
-            array($blob24, $filter31, 1),
-            array($blob24, $filter32, 0),
-            array($blob25, $filter31, 1),
-            array($blob25, $filter32, 0),
-            array($blob26, $filter31, 1),
-            array($blob26, $filter32, 0),
+            [$blob21, $filter31, 1],
+            [$blob21, $filter32, 0],
+            [$blob22, $filter31, 1],
+            [$blob22, $filter32, 0],
+            [$blob23, $filter31, 1],
+            [$blob23, $filter32, 0],
+            [$blob24, $filter31, 1],
+            [$blob24, $filter32, 0],
+            [$blob25, $filter31, 1],
+            [$blob25, $filter32, 0],
+            [$blob26, $filter31, 1],
+            [$blob26, $filter32, 0],
 
             // Time-range on alarm for vtodo (77)
-            array($blob27, $filter33, 1),
-            array($blob27, $filter34, 0),
+            [$blob27, $filter33, 1],
+            [$blob27, $filter34, 0],
 
             // Time-range on alarm for vjournal (79)
-            array($blob28, $filter35, -1),
-            array($blob28, $filter36, -1),
+            [$blob28, $filter35, -1],
+            [$blob28, $filter36, -1],
 
             // Time-range on alarm with duration (81)
-            array($blob29, $filter31, 1),
-            array($blob29, $filter32, 0),
-            array($blob30, $filter31, 0),
-            array($blob30, $filter32, 0),
+            [$blob29, $filter31, 1],
+            [$blob29, $filter32, 0],
+            [$blob30, $filter31, 0],
+            [$blob30, $filter32, 0],
 
             // Time-range with RRULE (85)
-            array($blob31, $filter20, 1),
-            array($blob32, $filter20, 0),
+            [$blob31, $filter20, 1],
+            [$blob32, $filter20, 0],
 
             // Bug reported on mailing list, related to all-day events (87)
             //array($blob33, $filter38, 1),
 
             // Event in timerange, but filtered alarm is in the far future (88).
-            array($blob34, $filter39, 0),
-        );
+            [$blob34, $filter39, 0],
+        ];
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarTest.php
index ea744d2cf..df85b6ded 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/CalendarTest.php
@@ -3,7 +3,6 @@
 namespace Sabre\CalDAV;
 
 use Sabre\DAV\PropPatch;
-use Sabre\DAVACL;
 
 require_once 'Sabre/CalDAV/TestUtil.php';
 
@@ -25,8 +24,6 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
 
     function setup() {
 
-        if (!SABRE_HASSQLITE) $this->markTestSkipped('SQLite driver is not available');
-
         $this->backend = TestUtil::getBackend();
 
         $this->calendars = $this->backend->getCalendarsForUser('principals/user1');
@@ -63,7 +60,7 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
         $this->assertEquals(true, $result);
 
         $calendars2 = $this->backend->getCalendarsForUser('principals/user1');
-        $this->assertEquals('NewName',$calendars2[0]['{DAV:}displayname']);
+        $this->assertEquals('NewName', $calendars2[0]['{DAV:}displayname']);
 
     }
 
@@ -72,15 +69,15 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
      */
     function testGetProperties() {
 
-        $question = array(
+        $question = [
             '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set',
-        );
+        ];
 
         $result = $this->calendar->getProperties($question);
 
-        foreach($question as $q) $this->assertArrayHasKey($q,$result);
+        foreach ($question as $q) $this->assertArrayHasKey($q, $result);
 
-        $this->assertEquals(array('VEVENT','VTODO'), $result['{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set']->getValue());
+        $this->assertEquals(['VEVENT', 'VTODO'], $result['{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set']->getValue());
 
     }
 
@@ -100,7 +97,7 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
     function testGetChildren() {
 
         $children = $this->calendar->getChildren();
-        $this->assertEquals(1,count($children));
+        $this->assertEquals(1, count($children));
 
         $this->assertTrue($children[0] instanceof CalendarObject);
 
@@ -145,11 +142,11 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
 
     function testCreateFile() {
 
-        $file = fopen('php://memory','r+');
-        fwrite($file,TestUtil::getTestCalendarData());
+        $file = fopen('php://memory', 'r+');
+        fwrite($file, TestUtil::getTestCalendarData());
         rewind($file);
 
-        $this->calendar->createFile('hello',$file);
+        $this->calendar->createFile('hello', $file);
 
         $file = $this->calendar->getChild('hello');
         $this->assertTrue($file instanceof CalendarObject);
@@ -158,12 +155,12 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
 
     function testCreateFileNoSupportedComponents() {
 
-        $file = fopen('php://memory','r+');
-        fwrite($file,TestUtil::getTestCalendarData());
+        $file = fopen('php://memory', 'r+');
+        fwrite($file, TestUtil::getTestCalendarData());
         rewind($file);
 
         $calendar = new Calendar($this->backend, $this->calendars[1]);
-        $calendar->createFile('hello',$file);
+        $calendar->createFile('hello', $file);
 
         $file = $calendar->getChild('hello');
         $this->assertTrue($file instanceof CalendarObject);
@@ -180,7 +177,7 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
 
     function testGetOwner() {
 
-        $this->assertEquals('principals/user1',$this->calendar->getOwner());
+        $this->assertEquals('principals/user1', $this->calendar->getOwner());
 
     }
 
@@ -192,98 +189,68 @@ class CalendarTest extends \PHPUnit_Framework_TestCase {
 
     function testGetACL() {
 
-        $expected = array(
-            array(
+        $expected = [
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/user1',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/user1/calendar-proxy-write',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/user1/calendar-proxy-read',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{' . Plugin::NS_CALDAV . '}read-free-busy',
                 'principal' => '{DAV:}authenticated',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}write',
                 'principal' => 'principals/user1',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}write',
                 'principal' => 'principals/user1/calendar-proxy-write',
                 'protected' => true,
-            ),
-        );
+            ],
+        ];
         $this->assertEquals($expected, $this->calendar->getACL());
 
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\MethodNotAllowed
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
     function testSetACL() {
 
-        $this->calendar->setACL(array());
-
-    }
-
-    function testGetSupportedPrivilegesSet() {
-
-        $result = $this->calendar->getSupportedPrivilegeSet();
-
-        $this->assertEquals(
-            '{' . Plugin::NS_CALDAV . '}read-free-busy',
-            $result['aggregates'][0]['aggregates'][2]['privilege']
-        );
+        $this->calendar->setACL([]);
 
     }
 
     function testGetSyncToken() {
 
-        $this->assertEquals(2, $this->calendar->getSyncToken());
-
-    }
-    function testGetSyncToken2() {
-
-        $calendar = new Calendar(new Backend\Mock([],[]), [
-            '{DAV:}sync-token' => 2
-        ]);
-        $this->assertEquals(2, $this->calendar->getSyncToken());
+        $this->assertNull($this->calendar->getSyncToken());
 
     }
 
     function testGetSyncTokenNoSyncSupport() {
 
-        $calendar = new Calendar(new Backend\Mock([],[]), []);
+        $calendar = new Calendar(new Backend\Mock([], []), []);
         $this->assertNull($calendar->getSyncToken());
 
     }
 
     function testGetChanges() {
 
-        $this->assertEquals([
-            'syncToken' => 2,
-            'modified'  => [],
-            'deleted'   => [],
-            'added'     => ['UUID-2345'],
-        ], $this->calendar->getChanges(1, 1));
+        $this->assertNull($this->calendar->getChanges(1, 1));
 
     }
 
-    function testGetChangesNoSyncSupport() {
-
-        $calendar = new Calendar(new Backend\Mock([],[]), []);
-        $this->assertNull($calendar->getChanges(1,null));
-
-    }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDoubleEventsTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDoubleEventsTest.php
index b64fb122a..3a22e03d4 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDoubleEventsTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/ExpandEventsDoubleEventsTest.php
@@ -19,18 +19,18 @@ class ExpandEventsDoubleEventsTest extends \Sabre\DAVServerTest {
 
     protected $setupCalDAV = true;
 
-    protected $caldavCalendars = array(
-        array(
-            'id' => 1,
-            'name' => 'Calendar',
+    protected $caldavCalendars = [
+        [
+            'id'           => 1,
+            'name'         => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri' => 'calendar1',
-        )
-    );
+            'uri'          => 'calendar1',
+        ]
+    ];
 
-    protected $caldavCalendarObjects = array(
-        1 => array(
-           'event.ics' => array(
+    protected $caldavCalendarObjects = [
+        1 => [
+           'event.ics' => [
                 'calendardata' => 'BEGIN:VCALENDAR
 VERSION:2.0
 BEGIN:VEVENT
@@ -50,17 +50,17 @@ RECURRENCE-ID;TZID=Europe/Berlin:20120208T181500
 END:VEVENT
 END:VCALENDAR
 ',
-            ),
-        ),
-    );
+            ],
+        ],
+    ];
 
     function testExpand() {
 
         $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_METHOD' => 'REPORT',
+            'REQUEST_METHOD'    => 'REPORT',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-            'REQUEST_URI' => '/calendars/user1/calendar1',
-            'HTTP_DEPTH' => '1',
+            'REQUEST_URI'       => '/calendars/user1/calendar1',
+            'HTTP_DEPTH'        => '1',
         ]);
 
         $request->setBody('<?xml version="1.0" encoding="utf-8" ?>
@@ -88,12 +88,12 @@ END:VCALENDAR
             $start = strpos($response->body, 'BEGIN:VCALENDAR'),
             strpos($response->body, 'END:VCALENDAR') - $start + 13
         );
-        $body = str_replace('&#13;','',$body);
+        $body = str_replace('&#13;', '', $body);
 
         $vObject = VObject\Reader::read($body);
 
         // We only expect 3 events
-        $this->assertEquals(3, count($vObject->VEVENT),'We got 6 events instead of 3. Output: ' . $body);
+        $this->assertEquals(3, count($vObject->VEVENT), 'We got 6 events instead of 3. Output: ' . $body);
 
         // TZID should be gone
         $this->assertFalse(isset($vObject->VEVENT->DTSTART['TZID']));
@@ -101,4 +101,3 @@ END:VCALENDAR
     }
 
 }
-
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/FreeBusyReportTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/FreeBusyReportTest.php
index 84f05f3c0..7a756774f 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/FreeBusyReportTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/FreeBusyReportTest.php
@@ -3,7 +3,6 @@
 namespace Sabre\CalDAV;
 
 use Sabre\DAV;
-use Sabre\DAVACL;
 use Sabre\HTTP;
 
 require_once 'Sabre/CalDAV/Backend/Mock.php';
@@ -31,8 +30,8 @@ END:VEVENT
 END:VCALENDAR
 ics;
 
-        $obj2 = fopen('php://memory','r+');
-        fwrite($obj2,<<<ics
+        $obj2 = fopen('php://memory', 'r+');
+        fwrite($obj2, <<<ics
 BEGIN:VCALENDAR
 BEGIN:VEVENT
 DTSTART:20121005T120000Z
@@ -55,18 +54,18 @@ ics;
         $calendarData = [
             1 => [
                 'obj1' => [
-                    'calendarid' => 1,
-                    'uri' => 'event1.ics',
+                    'calendarid'   => 1,
+                    'uri'          => 'event1.ics',
                     'calendardata' => $obj1,
                 ],
                 'obj2' => [
-                    'calendarid' => 1,
-                    'uri' => 'event2.ics',
+                    'calendarid'   => 1,
+                    'uri'          => 'event2.ics',
                     'calendardata' => $obj2
                 ],
                 'obj3' => [
-                    'calendarid' => 1,
-                    'uri' => 'event3.ics',
+                    'calendarid'   => 1,
+                    'uri'          => 'event3.ics',
                     'calendardata' => $obj3
                 ]
             ],
@@ -76,9 +75,9 @@ ics;
         $caldavBackend = new Backend\Mock([], $calendarData);
 
         $calendar = new Calendar($caldavBackend, [
-            'id' => 1,
-            'uri' => 'calendar',
-            'principaluri' => 'principals/user1',
+            'id'                                           => 1,
+            'uri'                                          => 'calendar',
+            'principaluri'                                 => 'principals/user1',
             '{' . Plugin::NS_CALDAV . '}calendar-timezone' => "BEGIN:VCALENDAR\r\nBEGIN:VTIMEZONE\r\nTZID:Europe/Berlin\r\nEND:VTIMEZONE\r\nEND:VCALENDAR",
         ]);
 
@@ -105,13 +104,13 @@ ics;
 XML;
 
         $report = $this->server->xml->parse($reportXML, null, $rootElem);
-        $this->plugin->report($rootElem, $report);
+        $this->plugin->report($rootElem, $report, null);
 
         $this->assertEquals(200, $this->server->httpResponse->status);
         $this->assertEquals('text/calendar', $this->server->httpResponse->getHeader('Content-Type'));
-        $this->assertTrue(strpos($this->server->httpResponse->body, 'BEGIN:VFREEBUSY')!==false);
-        $this->assertTrue(strpos($this->server->httpResponse->body, '20111005T120000Z/20111005T130000Z')!==false);
-        $this->assertTrue(strpos($this->server->httpResponse->body, '20111006T100000Z/20111006T110000Z')!==false);
+        $this->assertTrue(strpos($this->server->httpResponse->body, 'BEGIN:VFREEBUSY') !== false);
+        $this->assertTrue(strpos($this->server->httpResponse->body, '20111005T120000Z/20111005T130000Z') !== false);
+        $this->assertTrue(strpos($this->server->httpResponse->body, '20111006T100000Z/20111006T110000Z') !== false);
 
     }
 
@@ -127,7 +126,6 @@ XML;
 XML;
 
         $report = $this->server->xml->parse($reportXML, null, $rootElem);
-        $this->plugin->report($rootElem, $report);
 
     }
 
@@ -136,9 +134,9 @@ XML;
      */
     function testFreeBusyReportWrongNode() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_URI' => '/',
-        ));
+        ]);
         $this->server->httpRequest = $request;
 
         $reportXML = <<<XML
@@ -149,7 +147,7 @@ XML;
 XML;
 
         $report = $this->server->xml->parse($reportXML, null, $rootElem);
-        $this->plugin->report($rootElem, $report);
+        $this->plugin->report($rootElem, $report, null);
 
     }
 
@@ -170,7 +168,7 @@ XML;
 XML;
 
         $report = $this->server->xml->parse($reportXML, null, $rootElem);
-        $this->plugin->report($rootElem, $report);
+        $this->plugin->report($rootElem, $report, null);
 
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/GetEventsByTimerangeTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/GetEventsByTimerangeTest.php
index c3c97e8f6..5fd8d29a1 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/GetEventsByTimerangeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/GetEventsByTimerangeTest.php
@@ -75,7 +75,7 @@ END:VCALENDAR
 
         $response = $this->request($request);
 
-        $this->assertTrue(strpos($response->body, 'BEGIN:VCALENDAR')!==false);
+        $this->assertTrue(strpos($response->body, 'BEGIN:VCALENDAR') !== false);
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/ICSExportPluginTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/ICSExportPluginTest.php
index c123bd0c1..9719529fb 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/ICSExportPluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/ICSExportPluginTest.php
@@ -7,657 +7,380 @@ use Sabre\HTTP;
 use Sabre\VObject;
 use Sabre\DAVACL;
 
-require_once 'Sabre/CalDAV/TestUtil.php';
-require_once 'Sabre/HTTP/ResponseMock.php';
+class ICSExportPluginTest extends \Sabre\DAVServerTest {
 
-class ICSExportPluginTest extends \PHPUnit_Framework_TestCase {
+    protected $setupCalDAV = true;
+
+    protected $icsExportPlugin;
 
     function setUp() {
 
-        if (!SABRE_HASSQLITE) $this->markTestSkipped('SQLite driver is not available');
+        parent::setUp();
+        $this->icsExportPlugin = new ICSExportPlugin();
+        $this->server->addPlugin(
+            $this->icsExportPlugin
+        );
 
-    }
+        $id = $this->caldavBackend->createCalendar(
+            'principals/admin',
+            'UUID-123467',
+            [
+                '{DAV:}displayname'                         => 'Hello!',
+                '{http://apple.com/ns/ical/}calendar-color' => '#AA0000FF',
+            ]
+        );
 
-    function testInit() {
+        $this->caldavBackend->createCalendarObject(
+            $id,
+            'event-1',
+            <<<ICS
+BEGIN:VCALENDAR
+BEGIN:VTIMEZONE
+TZID:Europe/Amsterdam
+END:VTIMEZONE
+BEGIN:VEVENT
+UID:event-1
+DTSTART;TZID=Europe/Amsterdam:20151020T000000
+END:VEVENT
+END:VCALENDAR
+ICS
+        );
+        $this->caldavBackend->createCalendarObject(
+            $id,
+            'todo-1',
+            <<<ICS
+BEGIN:VCALENDAR
+BEGIN:VTODO
+UID:todo-1
+END:VTODO
+END:VCALENDAR
+ICS
+        );
 
-        $p = new ICSExportPlugin();
-        $s = new DAV\Server();
-        $s->addPlugin($p);
-        $this->assertEquals($p, $s->getPlugin('ics-export'));
-        $this->assertEquals('ics-export', $p->getPluginInfo()['name']);
 
     }
 
-    function testBeforeMethod() {
+    function testInit() {
 
-        $cbackend = TestUtil::getBackend();
-
-        $props = [
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
-            '{DAV:}displayname' => 'Hello!',
-            '{http://apple.com/ns/ical/}calendar-color' => '#AA0000FF',
-        ];
-        $tree = [
-            new Calendar($cbackend,$props),
-        ];
-
-        $p = new ICSExportPlugin();
-
-        $s = new DAV\Server($tree);
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
-
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export',
-            'REQUEST_METHOD' => 'GET',
-        ]);
-
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
-
-        $this->assertFalse($p->httpGet($h, $s->httpResponse));
-
-        $this->assertEquals(200, $s->httpResponse->status);
-        $this->assertEquals([
-            'Content-Type' => ['text/calendar'],
-        ], $s->httpResponse->getHeaders());
-
-        $obj = VObject\Reader::read($s->httpResponse->body);
-
-        $this->assertEquals(7,count($obj->children()));
-        $this->assertEquals(1,count($obj->VERSION));
-        $this->assertEquals(1,count($obj->CALSCALE));
-        $this->assertEquals(1,count($obj->PRODID));
-        $this->assertTrue(strpos((string)$obj->PRODID, DAV\Version::VERSION)!==false);
-        $this->assertEquals(1,count($obj->VTIMEZONE));
-        $this->assertEquals(1,count($obj->VEVENT));
-        $this->assertEquals("Hello!", $obj->{"X-WR-CALNAME"});
-        $this->assertEquals("#AA0000FF", $obj->{"X-APPLE-CALENDAR-COLOR"});
+        $this->assertEquals(
+            $this->icsExportPlugin,
+            $this->server->getPlugin('ics-export')
+        );
+        $this->assertEquals($this->icsExportPlugin, $this->server->getPlugin('ics-export'));
+        $this->assertEquals('ics-export', $this->icsExportPlugin->getPluginInfo()['name']);
 
     }
-    function testBeforeMethodNoVersion() {
 
-        if (!SABRE_HASSQLITE) $this->markTestSkipped('SQLite driver is not available');
-        $cbackend = TestUtil::getBackend();
+    function testBeforeMethod() {
 
-        $props = [
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
-        ];
-        $tree = [
-            new Calendar($cbackend,$props),
-        ];
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export'
+        );
 
-        $p = new ICSExportPlugin();
+        $response = $this->request($request);
 
-        $s = new DAV\Server($tree);
+        $this->assertEquals(200, $response->getStatus());
+        $this->assertEquals('text/calendar', $response->getHeader('Content-Type'));
 
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
+        $obj = VObject\Reader::read($response->body);
 
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export',
-            'REQUEST_METHOD' => 'GET',
-        ]);
+        $this->assertEquals(8, count($obj->children()));
+        $this->assertEquals(1, count($obj->VERSION));
+        $this->assertEquals(1, count($obj->CALSCALE));
+        $this->assertEquals(1, count($obj->PRODID));
+        $this->assertTrue(strpos((string)$obj->PRODID, DAV\Version::VERSION) !== false);
+        $this->assertEquals(1, count($obj->VTIMEZONE));
+        $this->assertEquals(1, count($obj->VEVENT));
+        $this->assertEquals("Hello!", $obj->{"X-WR-CALNAME"});
+        $this->assertEquals("#AA0000FF", $obj->{"X-APPLE-CALENDAR-COLOR"});
 
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
+    }
+    function testBeforeMethodNoVersion() {
 
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export'
+        );
         DAV\Server::$exposeVersion = false;
-        $this->assertFalse($p->httpGet($h, $s->httpResponse));
+        $response = $this->request($request);
         DAV\Server::$exposeVersion = true;
 
-        $this->assertEquals(200, $s->httpResponse->status);
-        $this->assertEquals([
-            'Content-Type' => ['text/calendar'],
-        ], $s->httpResponse->getHeaders());
+        $this->assertEquals(200, $response->getStatus());
+        $this->assertEquals('text/calendar', $response->getHeader('Content-Type'));
 
-        $obj = VObject\Reader::read($s->httpResponse->body);
+        $obj = VObject\Reader::read($response->body);
 
-        $this->assertEquals(5,count($obj->children()));
-        $this->assertEquals(1,count($obj->VERSION));
-        $this->assertEquals(1,count($obj->CALSCALE));
-        $this->assertEquals(1,count($obj->PRODID));
-        $this->assertFalse(strpos((string)$obj->PRODID, DAV\Version::VERSION)!==false);
-        $this->assertEquals(1,count($obj->VTIMEZONE));
-        $this->assertEquals(1,count($obj->VEVENT));
+        $this->assertEquals(8, count($obj->children()));
+        $this->assertEquals(1, count($obj->VERSION));
+        $this->assertEquals(1, count($obj->CALSCALE));
+        $this->assertEquals(1, count($obj->PRODID));
+        $this->assertFalse(strpos((string)$obj->PRODID, DAV\Version::VERSION) !== false);
+        $this->assertEquals(1, count($obj->VTIMEZONE));
+        $this->assertEquals(1, count($obj->VEVENT));
 
     }
 
     function testBeforeMethodNoExport() {
 
-        $p = new ICSExportPlugin();
-
-        $s = new DAV\Server();
-        $s->addPlugin($p);
-
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467',
-            'REQUEST_METHOD' => 'GET',
-        ]);
-        $this->assertNull($p->httpGet($h, $s->httpResponse));
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467'
+        );
+        $response = new HTTP\Response();
+        $this->assertNull($this->icsExportPlugin->httpGet($request, $response));
 
     }
 
     function testACLIntegrationBlocked() {
 
-        $cbackend = TestUtil::getBackend();
-
-        $props = array(
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
+        $aclPlugin = new DAVACL\Plugin();
+        $aclPlugin->allowUnauthenticatedAccess = false;
+        $this->server->addPlugin(
+            $aclPlugin
         );
-        $tree = array(
-            new Calendar($cbackend,$props),
-        );
-
-        $p = new ICSExportPlugin();
-
-        $s = new DAV\Server($tree);
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
-        $s->addPlugin(new DAVACL\Plugin());
-
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export',
-        ]);
 
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
-
-        $p->httpGet($h, $s->httpResponse);
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export'
+        );
 
-        // If the ACL system blocked this request, the effect will be that
-        // there's no response, because the calendar information could not be
-        // fetched.
-        $this->assertNull($s->httpResponse->getStatus());
+        $this->request($request, 403);
 
     }
 
     function testACLIntegrationNotBlocked() {
 
-        $cbackend = TestUtil::getBackend();
-        $pbackend = new DAVACL\PrincipalBackend\Mock();
-
-        $props = array(
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
+        $aclPlugin = new DAVACL\Plugin();
+        $aclPlugin->allowUnauthenticatedAccess = false;
+        $this->server->addPlugin(
+            $aclPlugin
         );
-        $tree = array(
-            new Calendar($cbackend,$props),
-            new DAVACL\PrincipalCollection($pbackend),
+        $this->server->addPlugin(
+            new Plugin()
         );
 
-        $p = new ICSExportPlugin();
+        $this->autoLogin('admin');
 
-        $s = new DAV\Server($tree);
-        $s->sapi = new HTTP\SapiMock();
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
-        $s->addPlugin(new DAVACL\Plugin());
-        $s->addPlugin(new DAV\Auth\Plugin(new DAV\Auth\Backend\Mock(),'SabreDAV'));
-
-        // Forcing login
-        $s->getPlugin('acl')->adminPrincipals = array('principals/admin');
-
-
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export',
-            'REQUEST_METHOD' => 'GET',
-        ]);
-
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
-
-        $s->exec();
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export'
+        );
 
-        $this->assertEquals(200, $s->httpResponse->status,'Invalid status received. Response body: '. $s->httpResponse->body);
-        $this->assertEquals(array(
-            'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['text/calendar'],
-        ), $s->httpResponse->getHeaders());
+        $response = $this->request($request, 200);
+        $this->assertEquals('text/calendar', $response->getHeader('Content-Type'));
 
-        $obj = VObject\Reader::read($s->httpResponse->body);
+        $obj = VObject\Reader::read($response->body);
 
-        $this->assertEquals(5,count($obj->children()));
-        $this->assertEquals(1,count($obj->VERSION));
-        $this->assertEquals(1,count($obj->CALSCALE));
-        $this->assertEquals(1,count($obj->PRODID));
-        $this->assertEquals(1,count($obj->VTIMEZONE));
-        $this->assertEquals(1,count($obj->VEVENT));
+        $this->assertEquals(8, count($obj->children()));
+        $this->assertEquals(1, count($obj->VERSION));
+        $this->assertEquals(1, count($obj->CALSCALE));
+        $this->assertEquals(1, count($obj->PRODID));
+        $this->assertTrue(strpos((string)$obj->PRODID, DAV\Version::VERSION) !== false);
+        $this->assertEquals(1, count($obj->VTIMEZONE));
+        $this->assertEquals(1, count($obj->VEVENT));
 
     }
 
     function testBadStartParam() {
 
-        $cbackend = TestUtil::getBackend();
-        $pbackend = new DAVACL\PrincipalBackend\Mock();
-
-        $props = array(
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
-        );
-        $tree = array(
-            new Calendar($cbackend,$props),
-            new DAVACL\PrincipalCollection($pbackend),
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export&start=foo'
         );
-
-        $p = new ICSExportPlugin();
-
-        $s = new DAV\Server($tree);
-        $s->sapi = new HTTP\SapiMock();
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
-
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export&start=foo',
-            'REQUEST_METHOD' => 'GET',
-        ]);
-
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
-
-        $s->exec();
-
-        $this->assertEquals(400, $s->httpResponse->status,'Invalid status received. Response body: '. $s->httpResponse->body);
+        $this->request($request, 400);
 
     }
 
     function testBadEndParam() {
 
-        $cbackend = TestUtil::getBackend();
-        $pbackend = new DAVACL\PrincipalBackend\Mock();
-
-        $props = array(
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export&end=foo'
         );
-        $tree = array(
-            new Calendar($cbackend,$props),
-            new DAVACL\PrincipalCollection($pbackend),
-        );
-
-        $p = new ICSExportPlugin();
-
-        $s = new DAV\Server($tree);
-        $s->sapi = new HTTP\SapiMock();
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
-
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export&end=foo',
-            'REQUEST_METHOD' => 'GET',
-        ]);
-
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
-
-        $s->exec();
-
-        $this->assertEquals(400, $s->httpResponse->status,'Invalid status received. Response body: '. $s->httpResponse->body);
+        $this->request($request, 400);
 
     }
 
     function testFilterStartEnd() {
 
-        $cbackend = TestUtil::getBackend();
-        $pbackend = new DAVACL\PrincipalBackend\Mock();
-
-        $props = array(
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export&start=1&end=2'
         );
-        $tree = array(
-            new Calendar($cbackend,$props),
-            new DAVACL\PrincipalCollection($pbackend),
-        );
-
-        $p = new ICSExportPlugin();
-
-        $s = new DAV\Server($tree);
-        $s->sapi = new HTTP\SapiMock();
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
-
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export&start=1&end=2',
-            'REQUEST_METHOD' => 'GET',
-        ]);
+        $response = $this->request($request, 200);
 
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
+        $obj = VObject\Reader::read($response->getBody());
 
-        $s->exec();
-
-        $this->assertEquals(200, $s->httpResponse->status,'Invalid status received. Response body: '. $s->httpResponse->body);
-        $obj = VObject\Reader::read($s->httpResponse->body);
-
-        $this->assertEquals(0,count($obj->VTIMEZONE));
-        $this->assertEquals(0,count($obj->VEVENT));
+        $this->assertEquals(0, count($obj->VTIMEZONE));
+        $this->assertEquals(0, count($obj->VEVENT));
 
     }
 
     function testExpandNoStart() {
 
-        $cbackend = TestUtil::getBackend();
-        $pbackend = new DAVACL\PrincipalBackend\Mock();
-
-        $props = array(
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export&expand=1&end=2'
         );
-        $tree = array(
-            new Calendar($cbackend,$props),
-            new DAVACL\PrincipalCollection($pbackend),
-        );
-
-        $p = new ICSExportPlugin();
-
-        $s = new DAV\Server($tree);
-        $s->sapi = new HTTP\SapiMock();
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
-
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export&expand=1&end=1',
-            'REQUEST_METHOD' => 'GET',
-        ]);
-
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
-
-        $s->exec();
-
-        $this->assertEquals(400, $s->httpResponse->status,'Invalid status received. Response body: '. $s->httpResponse->body);
+        $this->request($request, 400);
 
     }
 
     function testExpand() {
 
-        $cbackend = TestUtil::getBackend();
-        $pbackend = new DAVACL\PrincipalBackend\Mock();
-
-        $props = array(
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export&start=1&end=2000000000&expand=1'
         );
-        $tree = array(
-            new Calendar($cbackend,$props),
-            new DAVACL\PrincipalCollection($pbackend),
-        );
-
-        $p = new ICSExportPlugin();
-
-        $s = new DAV\Server($tree);
-        $s->sapi = new HTTP\SapiMock();
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
-
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export&start=1&end=2000000000&expand=1',
-            'REQUEST_METHOD' => 'GET',
-        ]);
+        $response = $this->request($request, 200);
 
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
+        $obj = VObject\Reader::read($response->getBody());
 
-        $s->exec();
-
-        $this->assertEquals(200, $s->httpResponse->status,'Invalid status received. Response body: '. $s->httpResponse->body);
-        $obj = VObject\Reader::read($s->httpResponse->body);
-
-        $this->assertEquals(0,count($obj->VTIMEZONE));
-        $this->assertEquals(1,count($obj->VEVENT));
+        $this->assertEquals(0, count($obj->VTIMEZONE));
+        $this->assertEquals(1, count($obj->VEVENT));
 
     }
 
     function testJCal() {
 
-        $cbackend = TestUtil::getBackend();
-        $pbackend = new DAVACL\PrincipalBackend\Mock();
-
-        $props = array(
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export',
+            ['Accept' => 'application/calendar+json']
         );
-        $tree = array(
-            new Calendar($cbackend,$props),
-            new DAVACL\PrincipalCollection($pbackend),
-        );
-
-        $p = new ICSExportPlugin();
-
-        $s = new DAV\Server($tree);
-        $s->sapi = new HTTP\SapiMock();
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
-
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export',
-            'REQUEST_METHOD' => 'GET',
-            'HTTP_ACCEPT' => 'application/calendar+json',
-        ]);
 
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
-
-        $s->exec();
-
-        $this->assertEquals(200, $s->httpResponse->status,'Invalid status received. Response body: '. $s->httpResponse->body);
-        $this->assertEquals('application/calendar+json', $s->httpResponse->getHeader('Content-Type'));
+        $response = $this->request($request, 200);
+        $this->assertEquals('application/calendar+json', $response->getHeader('Content-Type'));
 
     }
 
     function testJCalInUrl() {
 
-        $cbackend = TestUtil::getBackend();
-        $pbackend = new DAVACL\PrincipalBackend\Mock();
-
-        $props = array(
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
-        );
-        $tree = array(
-            new Calendar($cbackend,$props),
-            new DAVACL\PrincipalCollection($pbackend),
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export&accept=jcal'
         );
 
-        $p = new ICSExportPlugin();
-
-        $s = new DAV\Server($tree);
-        $s->sapi = new HTTP\SapiMock();
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
-
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export&accept=jcal',
-            'REQUEST_METHOD' => 'GET',
-        ]);
-
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
-
-        $s->exec();
-
-        $this->assertEquals(200, $s->httpResponse->status,'Invalid status received. Response body: '. $s->httpResponse->body);
-        $this->assertEquals('application/calendar+json', $s->httpResponse->getHeader('Content-Type'));
+        $response = $this->request($request, 200);
+        $this->assertEquals('application/calendar+json', $response->getHeader('Content-Type'));
 
     }
 
     function testNegotiateDefault() {
 
-        $cbackend = TestUtil::getBackend();
-        $pbackend = new DAVACL\PrincipalBackend\Mock();
-
-        $props = array(
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
-        );
-        $tree = array(
-            new Calendar($cbackend,$props),
-            new DAVACL\PrincipalCollection($pbackend),
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export',
+            ['Accept' => 'text/plain']
         );
 
-        $p = new ICSExportPlugin();
-
-        $s = new DAV\Server($tree);
-        $s->sapi = new HTTP\SapiMock();
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
-
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export',
-            'REQUEST_METHOD' => 'GET',
-            'HTTP_ACCEPT' => 'text/plain',
-        ]);
-
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
-
-        $s->exec();
-
-        $this->assertEquals(200, $s->httpResponse->status,'Invalid status received. Response body: '. $s->httpResponse->body);
-        $this->assertEquals('text/calendar', $s->httpResponse->getHeader('Content-Type'));
+        $response = $this->request($request, 200);
+        $this->assertEquals('text/calendar', $response->getHeader('Content-Type'));
 
     }
 
     function testFilterComponentVEVENT() {
 
-        $cbackend = TestUtil::getBackend();
-        $pbackend = new DAVACL\PrincipalBackend\Mock();
-
-        $props = array(
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
-        );
-        // add a todo to the calendar (see /tests/Sabre/TestUtil)
-        $cbackend->createCalendarObject(1, 'UUID-3456', TestUtil::getTestTODO());
-
-        $tree = array(
-            new Calendar($cbackend,$props),
-            new DAVACL\PrincipalCollection($pbackend),
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export&componentType=VEVENT'
         );
 
-        $p = new ICSExportPlugin();
+        $response = $this->request($request, 200);
 
-        $s = new DAV\Server($tree);
-        $s->sapi = new HTTP\SapiMock();
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
-
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export&componentType=VEVENT',
-            'REQUEST_METHOD' => 'GET',
-        ]);
-
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
-
-        $s->exec();
-
-        $this->assertEquals(200, $s->httpResponse->status,'Invalid status received. Response body: '. $s->httpResponse->body);
-        $obj = VObject\Reader::read($s->httpResponse->body);
-
-        $this->assertEquals(1,count($obj->VTIMEZONE));
-        $this->assertEquals(1,count($obj->VEVENT));
-        $this->assertEquals(0,count($obj->VTODO));
+        $obj = VObject\Reader::read($response->body);
+        $this->assertEquals(1, count($obj->VTIMEZONE));
+        $this->assertEquals(1, count($obj->VEVENT));
+        $this->assertEquals(0, count($obj->VTODO));
 
     }
 
     function testFilterComponentVTODO() {
 
-        $cbackend = TestUtil::getBackend();
-        $pbackend = new DAVACL\PrincipalBackend\Mock();
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export&componentType=VTODO'
+        );
 
-        $props = [
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
-        ];
-        // add a todo to the calendar (see /tests/Sabre/TestUtil)
-        $cbackend->createCalendarObject(1, 'UUID-3456', TestUtil::getTestTODO());
+        $response = $this->request($request, 200);
 
-        $tree = [
-            new Calendar($cbackend,$props),
-            new DAVACL\PrincipalCollection($pbackend),
-        ];
+        $obj = VObject\Reader::read($response->body);
 
-        $p = new ICSExportPlugin();
+        $this->assertEquals(0, count($obj->VTIMEZONE));
+        $this->assertEquals(0, count($obj->VEVENT));
+        $this->assertEquals(1, count($obj->VTODO));
 
-        $s = new DAV\Server($tree);
-        $s->sapi = new HTTP\SapiMock();
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
+    }
 
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export&componentType=VTODO',
-            'REQUEST_METHOD' => 'GET',
-        ]);
+    function testFilterComponentBadComponent() {
 
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export&componentType=VVOODOO'
+        );
 
-        $s->exec();
+        $response = $this->request($request, 400);
 
-        $this->assertEquals(200, $s->httpResponse->status,'Invalid status received. Response body: '. $s->httpResponse->body);
-        $obj = VObject\Reader::read($s->httpResponse->body);
+    }
 
-        $this->assertEquals(0,count($obj->VTIMEZONE));
-        $this->assertEquals(0,count($obj->VEVENT));
-        $this->assertEquals(1,count($obj->VTODO));
+    function testContentDisposition() {
 
-    }
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export'
+        );
 
-    function testFilterComponentBadComponent() {
+        $response = $this->request($request, 200);
+        $this->assertEquals('text/calendar', $response->getHeader('Content-Type'));
+        $this->assertEquals(
+            'attachment; filename="UUID-123467-' . date('Y-m-d') . '.ics"',
+            $response->getHeader('Content-Disposition')
+        );
 
-        $cbackend = TestUtil::getBackend();
-        $pbackend = new DAVACL\PrincipalBackend\Mock();
+    }
 
-        $props = [
-            'uri'=>'UUID-123467',
-            'principaluri' => 'admin',
-            'id' => 1,
-        ];
-        // add a todo to the calendar (see /tests/Sabre/TestUtil)
-        $cbackend->createCalendarObject(1, 'UUID-3456', TestUtil::getTestTODO());
+    function testContentDispositionJson() {
 
-        $tree = [
-            new Calendar($cbackend,$props),
-            new DAVACL\PrincipalCollection($pbackend),
-        ];
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-123467?export',
+            ['Accept' => 'application/calendar+json']
+        );
 
-        $p = new ICSExportPlugin();
+        $response = $this->request($request, 200);
+        $this->assertEquals('application/calendar+json', $response->getHeader('Content-Type'));
+        $this->assertEquals(
+            'attachment; filename="UUID-123467-' . date('Y-m-d') . '.json"',
+            $response->getHeader('Content-Disposition')
+        );
 
-        $s = new DAV\Server($tree);
-        $s->sapi = new HTTP\SapiMock();
-        $s->addPlugin($p);
-        $s->addPlugin(new Plugin());
+    }
 
-        $h = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/UUID-123467?export&componentType=VVOODOO',
-            'REQUEST_METHOD' => 'GET',
-        ]);
+    function testContentDispositionBadChars() {
 
-        $s->httpRequest = $h;
-        $s->httpResponse = new HTTP\ResponseMock();
+        $this->caldavBackend->createCalendar(
+            'principals/admin',
+            'UUID-b_ad"(ch)ars',
+            [
+                '{DAV:}displayname'                         => 'Test bad characters',
+                '{http://apple.com/ns/ical/}calendar-color' => '#AA0000FF',
+            ]
+        );
 
-        $s->exec();
+        $request = new HTTP\Request(
+            'GET',
+            '/calendars/admin/UUID-b_ad"(ch)ars?export',
+            ['Accept' => 'application/calendar+json']
+        );
 
-        $this->assertEquals(400, $s->httpResponse->status,'Invalid status received. Response body: '. $s->httpResponse->body);
+        $response = $this->request($request, 200);
+        $this->assertEquals('application/calendar+json', $response->getHeader('Content-Type'));
+        $this->assertEquals(
+            'attachment; filename="UUID-b_adchars-' . date('Y-m-d') . '.json"',
+            $response->getHeader('Content-Disposition')
+        );
 
     }
+
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue166Test.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue166Test.php
index f925224f2..a1a9b7c04 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue166Test.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue166Test.php
@@ -1,8 +1,8 @@
 <?php
 
 namespace Sabre\CalDAV;
+
 use Sabre\VObject;
-use Sabre\DAV;
 
 class Issue166Test extends \PHPUnit_Framework_TestCase {
 
@@ -37,26 +37,26 @@ HI;
 
         $validator = new CalendarQueryValidator();
 
-        $filters = array(
-            'name' => 'VCALENDAR',
-            'comp-filters' => array(
-                array(
-                    'name' => 'VEVENT',
-                    'comp-filters' => array(),
-                    'prop-filters' => array(),
+        $filters = [
+            'name'         => 'VCALENDAR',
+            'comp-filters' => [
+                [
+                    'name'           => 'VEVENT',
+                    'comp-filters'   => [],
+                    'prop-filters'   => [],
                     'is-not-defined' => false,
-                    'time-range' => array(
+                    'time-range'     => [
                         'start' => new \DateTime('2011-12-01'),
                         'end'   => new \DateTime('2012-02-01'),
-                    ),
-                ),
-            ),
-            'prop-filters' => array(),
+                    ],
+                ],
+            ],
+            'prop-filters'   => [],
             'is-not-defined' => false,
-            'time-range' => null,
-        );
+            'time-range'     => null,
+        ];
         $input = VObject\Reader::read($input);
-        $this->assertTrue($validator->validate($input,$filters));
+        $this->assertTrue($validator->validate($input, $filters));
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue172Test.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue172Test.php
index ce6d364f6..e2b85c2bc 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue172Test.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue172Test.php
@@ -1,8 +1,8 @@
 <?php
 
 namespace Sabre\CalDAV;
+
 use Sabre\VObject;
-use Sabre\DAV;
 
 class Issue172Test extends \PHPUnit_Framework_TestCase {
 
@@ -18,24 +18,24 @@ END:VEVENT
 END:VCALENDAR
 HI;
         $validator = new CalendarQueryValidator();
-        $filters = array(
-            'name' => 'VCALENDAR',
-            'comp-filters' => array(
-                array(
-                    'name' => 'VEVENT',
-                    'comp-filters' => array(),
-                    'prop-filters' => array(),
+        $filters = [
+            'name'         => 'VCALENDAR',
+            'comp-filters' => [
+                [
+                    'name'           => 'VEVENT',
+                    'comp-filters'   => [],
+                    'prop-filters'   => [],
                     'is-not-defined' => false,
-                    'time-range' => array(
+                    'time-range'     => [
                         'start' => new \DateTime('2012-01-18 21:00:00 GMT-08:00'),
                         'end'   => new \DateTime('2012-01-18 21:00:00 GMT-08:00'),
-                    ),
-                ),
-            ),
-            'prop-filters' => array(),
-        );
+                    ],
+                ],
+            ],
+            'prop-filters' => [],
+        ];
         $input = VObject\Reader::read($input);
-        $this->assertTrue($validator->validate($input,$filters));
+        $this->assertTrue($validator->validate($input, $filters));
     }
 
     // Pacific Standard Time, translates to America/Los_Angeles (GMT-8 in January)
@@ -65,24 +65,24 @@ END:VEVENT
 END:VCALENDAR
 HI;
         $validator = new CalendarQueryValidator();
-        $filters = array(
-            'name' => 'VCALENDAR',
-            'comp-filters' => array(
-                array(
-                    'name' => 'VEVENT',
-                    'comp-filters' => array(),
-                    'prop-filters' => array(),
+        $filters = [
+            'name'         => 'VCALENDAR',
+            'comp-filters' => [
+                [
+                    'name'           => 'VEVENT',
+                    'comp-filters'   => [],
+                    'prop-filters'   => [],
                     'is-not-defined' => false,
-                    'time-range' => array(
+                    'time-range'     => [
                         'start' => new \DateTime('2012-01-13 10:30:00 GMT-08:00'),
                         'end'   => new \DateTime('2012-01-13 10:30:00 GMT-08:00'),
-                    ),
-                ),
-            ),
-            'prop-filters' => array(),
-        );
+                    ],
+                ],
+            ],
+            'prop-filters' => [],
+        ];
         $input = VObject\Reader::read($input);
-        $this->assertTrue($validator->validate($input,$filters));
+        $this->assertTrue($validator->validate($input, $filters));
     }
 
     // X-LIC-LOCATION, translates to America/Los_Angeles (GMT-8 in January)
@@ -113,23 +113,23 @@ END:VEVENT
 END:VCALENDAR
 HI;
         $validator = new CalendarQueryValidator();
-        $filters = array(
-            'name' => 'VCALENDAR',
-            'comp-filters' => array(
-                array(
-                    'name' => 'VEVENT',
-                    'comp-filters' => array(),
-                    'prop-filters' => array(),
+        $filters = [
+            'name'         => 'VCALENDAR',
+            'comp-filters' => [
+                [
+                    'name'           => 'VEVENT',
+                    'comp-filters'   => [],
+                    'prop-filters'   => [],
                     'is-not-defined' => false,
-                    'time-range' => array(
+                    'time-range'     => [
                         'start' => new \DateTime('2012-01-13 10:30:00 GMT-08:00'),
                         'end'   => new \DateTime('2012-01-13 10:30:00 GMT-08:00'),
-                    ),
-                ),
-            ),
-            'prop-filters' => array(),
-        );
+                    ],
+                ],
+            ],
+            'prop-filters' => [],
+        ];
         $input = VObject\Reader::read($input);
-        $this->assertTrue($validator->validate($input,$filters));
+        $this->assertTrue($validator->validate($input, $filters));
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue205Test.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue205Test.php
index 4a53fcbe2..ce40a90b0 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue205Test.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue205Test.php
@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\CalDAV;
+
 use Sabre\HTTP;
 use Sabre\VObject;
 
@@ -15,18 +16,18 @@ class Issue205Test extends \Sabre\DAVServerTest {
 
     protected $setupCalDAV = true;
 
-    protected $caldavCalendars = array(
-        array(
-            'id' => 1,
-            'name' => 'Calendar',
+    protected $caldavCalendars = [
+        [
+            'id'           => 1,
+            'name'         => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri' => 'calendar1',
-        )
-    );
+            'uri'          => 'calendar1',
+        ]
+    ];
 
-    protected $caldavCalendarObjects = array(
-        1 => array(
-            'event.ics' => array(
+    protected $caldavCalendarObjects = [
+        1 => [
+            'event.ics' => [
                 'calendardata' => 'BEGIN:VCALENDAR
 VERSION:2.0
 BEGIN:VEVENT
@@ -44,18 +45,18 @@ END:VALARM
 END:VEVENT
 END:VCALENDAR
 ',
-            ),
-        ),
-    );
+            ],
+        ],
+    ];
 
     function testIssue205() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'REPORT',
+        $request = HTTP\Sapi::createFromServerArray([
+            'REQUEST_METHOD'    => 'REPORT',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-            'REQUEST_URI' => '/calendars/user1/calendar1',
-            'HTTP_DEPTH' => '1',
-        ));
+            'REQUEST_URI'       => '/calendars/user1/calendar1',
+            'HTTP_DEPTH'        => '1',
+        ]);
 
         $request->setBody('<?xml version="1.0" encoding="utf-8" ?>
 <C:calendar-query xmlns:D="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav">
@@ -87,7 +88,7 @@ END:VCALENDAR
             $start = strpos($response->body, 'BEGIN:VCALENDAR'),
             strpos($response->body, 'END:VCALENDAR') - $start + 13
         );
-        $body = str_replace('&#13;','',$body);
+        $body = str_replace('&#13;', '', $body);
 
         $vObject = VObject\Reader::read($body);
 
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue211Test.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue211Test.php
index f291e5e57..950629fd8 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue211Test.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue211Test.php
@@ -1,8 +1,8 @@
 <?php
 
 namespace Sabre\CalDAV;
+
 use Sabre\HTTP;
-use Sabre\VObject;
 
 /**
  * This unittest is created to check for an endless loop in Sabre\CalDAV\CalendarQueryValidator
@@ -15,18 +15,18 @@ class Issue211Test extends \Sabre\DAVServerTest {
 
     protected $setupCalDAV = true;
 
-    protected $caldavCalendars = array(
-        array(
-            'id' => 1,
-            'name' => 'Calendar',
+    protected $caldavCalendars = [
+        [
+            'id'           => 1,
+            'name'         => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri' => 'calendar1',
-        )
-    );
+            'uri'          => 'calendar1',
+        ]
+    ];
 
-    protected $caldavCalendarObjects = array(
-        1 => array(
-            'event.ics' => array(
+    protected $caldavCalendarObjects = [
+        1 => [
+            'event.ics' => [
                 'calendardata' => 'BEGIN:VCALENDAR
 VERSION:2.0
 BEGIN:VEVENT
@@ -49,18 +49,18 @@ END:VALARM
 END:VEVENT
 END:VCALENDAR
 ',
-            ),
-        ),
-    );
+            ],
+        ],
+    ];
 
     function testIssue211() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'REPORT',
+        $request = HTTP\Sapi::createFromServerArray([
+            'REQUEST_METHOD'    => 'REPORT',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-            'REQUEST_URI' => '/calendars/user1/calendar1',
-            'HTTP_DEPTH' => '1',
-        ));
+            'REQUEST_URI'       => '/calendars/user1/calendar1',
+            'HTTP_DEPTH'        => '1',
+        ]);
 
         $request->setBody('<?xml version="1.0" encoding="utf-8" ?>
 <C:calendar-query xmlns:D="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav">
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue220Test.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue220Test.php
index 7b5dbfe63..c3c0b5b48 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue220Test.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue220Test.php
@@ -15,18 +15,18 @@ class Issue220Test extends \Sabre\DAVServerTest {
 
     protected $setupCalDAV = true;
 
-    protected $caldavCalendars = array(
-        array(
-            'id' => 1,
-            'name' => 'Calendar',
+    protected $caldavCalendars = [
+        [
+            'id'           => 1,
+            'name'         => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri' => 'calendar1',
-        )
-    );
+            'uri'          => 'calendar1',
+        ]
+    ];
 
-    protected $caldavCalendarObjects = array(
-        1 => array(
-            'event.ics' => array(
+    protected $caldavCalendarObjects = [
+        1 => [
+            'event.ics' => [
                 'calendardata' => 'BEGIN:VCALENDAR
 VERSION:2.0
 BEGIN:VEVENT
@@ -59,18 +59,18 @@ UID:b64f14c5-dccc-4eda-947f-bdb1f763fbcd
 END:VEVENT
 END:VCALENDAR
 ',
-            ),
-        ),
-    );
+            ],
+        ],
+    ];
 
     function testIssue220() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'REPORT',
+        $request = HTTP\Sapi::createFromServerArray([
+            'REQUEST_METHOD'    => 'REPORT',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-            'REQUEST_URI' => '/calendars/user1/calendar1',
-            'HTTP_DEPTH' => '1',
-        ));
+            'REQUEST_URI'       => '/calendars/user1/calendar1',
+            'HTTP_DEPTH'        => '1',
+        ]);
 
         $request->setBody('<?xml version="1.0" encoding="utf-8" ?>
 <C:calendar-query xmlns:D="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav">
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue228Test.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue228Test.php
index ccc6b303a..d0783701d 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Issue228Test.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Issue228Test.php
@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\CalDAV;
+
 use Sabre\HTTP;
 
 /**
@@ -14,18 +15,18 @@ class Issue228Test extends \Sabre\DAVServerTest {
 
     protected $setupCalDAV = true;
 
-    protected $caldavCalendars = array(
-        array(
-            'id' => 1,
-            'name' => 'Calendar',
+    protected $caldavCalendars = [
+        [
+            'id'           => 1,
+            'name'         => 'Calendar',
             'principaluri' => 'principals/user1',
-            'uri' => 'calendar1',
-        )
-    );
+            'uri'          => 'calendar1',
+        ]
+    ];
 
-    protected $caldavCalendarObjects = array(
-        1 => array(
-            'event.ics' => array(
+    protected $caldavCalendarObjects = [
+        1 => [
+            'event.ics' => [
                 'calendardata' => 'BEGIN:VCALENDAR
 VERSION:2.0
 BEGIN:VEVENT
@@ -38,18 +39,18 @@ TRANSP:TRANSPARENT
 END:VEVENT
 END:VCALENDAR
 ',
-            ),
-        ),
-    );
+            ],
+        ],
+    ];
 
     function testIssue228() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'REPORT',
+        $request = HTTP\Sapi::createFromServerArray([
+            'REQUEST_METHOD'    => 'REPORT',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-            'REQUEST_URI' => '/calendars/user1/calendar1',
-            'HTTP_DEPTH' => '1',
-        ));
+            'REQUEST_URI'       => '/calendars/user1/calendar1',
+            'HTTP_DEPTH'        => '1',
+        ]);
 
         $request->setBody('<?xml version="1.0" encoding="utf-8" ?>
 <C:calendar-query xmlns:D="DAV:" xmlns:C="urn:ietf:params:xml:ns:caldav">
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/CollectionTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/CollectionTest.php
index 68035184f..6585f85c3 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/CollectionTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/CollectionTest.php
@@ -14,13 +14,13 @@ class CollectionTest extends \PHPUnit_Framework_TestCase {
 
         $this->principalUri = 'principals/user1';
 
-        $this->notification = new CalDAV\Xml\Notification\SystemStatus(1,'"1"');
+        $this->notification = new CalDAV\Xml\Notification\SystemStatus(1, '"1"');
 
-        $this->caldavBackend = new CalDAV\Backend\MockSharing(array(),array(), array(
-            'principals/user1' => array(
+        $this->caldavBackend = new CalDAV\Backend\MockSharing([], [], [
+            'principals/user1' => [
                 $this->notification
-            )
-        )); 
+            ]
+        ]);
 
         return new Collection($this->caldavBackend, $this->principalUri);
 
@@ -31,9 +31,9 @@ class CollectionTest extends \PHPUnit_Framework_TestCase {
         $col = $this->getInstance();
         $this->assertEquals('notifications', $col->getName());
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             new Node($this->caldavBackend, $this->principalUri, $this->notification)
-        ), $col->getChildren()); 
+        ], $col->getChildren());
 
     }
 
@@ -54,30 +54,25 @@ class CollectionTest extends \PHPUnit_Framework_TestCase {
     function testGetACL() {
 
         $col = $this->getInstance();
-        $expected = array(
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => $this->principalUri,
+        $expected = [
+            [
+                'privilege' => '{DAV:}all',
+                'principal' => '{DAV:}owner',
                 'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => $this->principalUri,
-                'protected' => true,
-            ),
-        );
+            ],
+        ];
 
         $this->assertEquals($expected, $col->getACL());
 
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\NotImplemented
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
     function testSetACL() {
 
         $col = $this->getInstance();
-        $col->setACL(array());
+        $col->setACL([]);
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/NodeTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/NodeTest.php
index d546116fc..6c6e02da8 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/NodeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Notifications/NodeTest.php
@@ -13,7 +13,7 @@ class NodeTest extends \PHPUnit_Framework_TestCase {
 
         $principalUri = 'principals/user1';
 
-        $this->systemStatus = new CalDAV\Xml\Notification\SystemStatus(1,'"1"');
+        $this->systemStatus = new CalDAV\Xml\Notification\SystemStatus(1, '"1"');
 
         $this->caldavBackend = new CalDAV\Backend\MockSharing([], [], [
             'principals/user1' => [
@@ -51,7 +51,7 @@ class NodeTest extends \PHPUnit_Framework_TestCase {
 
         $node = $this->getInstance();
         $node->delete();
-        $this->assertEquals(array(), $this->caldavBackend->getNotificationsForPrincipal('principals/user1'));
+        $this->assertEquals([], $this->caldavBackend->getNotificationsForPrincipal('principals/user1'));
 
     }
 
@@ -65,30 +65,25 @@ class NodeTest extends \PHPUnit_Framework_TestCase {
     function testGetACL() {
 
         $node = $this->getInstance();
-        $expected = array(
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/user1',
+        $expected = [
+            [
+                'privilege' => '{DAV:}all',
+                'principal' => '{DAV:}owner',
                 'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => 'principals/user1',
-                'protected' => true,
-            ),
-        );
+            ],
+        ];
 
         $this->assertEquals($expected, $node->getACL());
 
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\NotImplemented
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
     function testSetACL() {
 
         $node = $this->getInstance();
-        $node->setACL(array());
+        $node->setACL([]);
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/PluginTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/PluginTest.php
index 138012ffa..8d538dee5 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/PluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/PluginTest.php
@@ -81,12 +81,14 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
         $this->server->addPlugin($this->plugin);
 
         // Adding ACL plugin
-        $this->server->addPlugin(new DAVACL\Plugin());
+        $aclPlugin = new DAVACL\Plugin();
+        $aclPlugin->allowUnauthenticatedAccess = false;
+        $this->server->addPlugin($aclPlugin);
 
         // Adding Auth plugin, and ensuring that we are logged in.
         $authBackend = new DAV\Auth\Backend\Mock();
         $authBackend->setPrincipal('principals/user1');
-        $authPlugin = new DAV\Auth\Plugin($authBackend, 'SabreDAV');
+        $authPlugin = new DAV\Auth\Plugin($authBackend);
         $authPlugin->beforeMethod(new \Sabre\HTTP\Request(), new \Sabre\HTTP\Response());
         $this->server->addPlugin($authPlugin);
 
@@ -480,8 +482,9 @@ END:VCALENDAR';
         $this->assertInstanceOf('\\Sabre\\DAV\\Xml\\Property\\SupportedReportSet', $prop);
         $value = [
             '{DAV:}expand-property',
+            '{DAV:}principal-match',
             '{DAV:}principal-property-search',
-            '{DAV:}principal-search-property-set'
+            '{DAV:}principal-search-property-set',
         ];
         $this->assertEquals($value, $prop->getValue());
 
@@ -508,6 +511,7 @@ END:VCALENDAR';
             '{urn:ietf:params:xml:ns:caldav}calendar-query',
             '{urn:ietf:params:xml:ns:caldav}free-busy-query',
             '{DAV:}expand-property',
+            '{DAV:}principal-match',
             '{DAV:}principal-property-search',
             '{DAV:}principal-search-property-set'
         ];
@@ -533,6 +537,7 @@ END:VCALENDAR';
         $value = [
             '{DAV:}sync-collection',
             '{DAV:}expand-property',
+            '{DAV:}principal-match',
             '{DAV:}principal-property-search',
             '{DAV:}principal-search-property-set',
         ];
@@ -719,7 +724,7 @@ XML;
             '</c:calendar-query>';
 
         $request = new HTTP\Request('REPORT', '/calendars/user1/UUID-123467', [
-            'Depth' => '0',
+            'Depth'      => '0',
             'User-Agent' => 'MSFT-WP/8.10.14219 (gzip)',
         ]);
 
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/CollectionTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/CollectionTest.php
index 625f64211..23c248825 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/CollectionTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/CollectionTest.php
@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\CalDAV\Principal;
+
 use Sabre\DAVACL;
 
 class CollectionTest extends \PHPUnit_Framework_TestCase {
@@ -9,9 +10,9 @@ class CollectionTest extends \PHPUnit_Framework_TestCase {
 
         $back = new DAVACL\PrincipalBackend\Mock();
         $col = new Collection($back);
-        $r = $col->getChildForPrincipal(array(
+        $r = $col->getChildForPrincipal([
             'uri' => 'principals/admin',
-        ));
+        ]);
         $this->assertInstanceOf('Sabre\\CalDAV\\Principal\\User', $r);
 
     }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyReadTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyReadTest.php
index 1ee999a92..fe07f0131 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyReadTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyReadTest.php
@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\CalDAV\Principal;
+
 use Sabre\DAVACL;
 
 class ProxyReadTest extends \PHPUnit_Framework_TestCase {
@@ -10,9 +11,9 @@ class ProxyReadTest extends \PHPUnit_Framework_TestCase {
     function getInstance() {
 
         $backend = new DAVACL\PrincipalBackend\Mock();
-        $principal = new ProxyRead($backend, array(
+        $principal = new ProxyRead($backend, [
             'uri' => 'principal/user',
-        ));
+        ]);
         $this->backend = $backend;
         return $principal;
 
@@ -61,7 +62,7 @@ class ProxyReadTest extends \PHPUnit_Framework_TestCase {
     function testGetAlternateUriSet() {
 
         $i = $this->getInstance();
-        $this->assertEquals(array(), $i->getAlternateUriSet());
+        $this->assertEquals([], $i->getAlternateUriSet());
 
     }
 
@@ -75,25 +76,25 @@ class ProxyReadTest extends \PHPUnit_Framework_TestCase {
     function testGetGroupMemberSet() {
 
         $i = $this->getInstance();
-        $this->assertEquals(array(), $i->getGroupMemberSet());
+        $this->assertEquals([], $i->getGroupMemberSet());
 
     }
 
     function testGetGroupMembership() {
 
         $i = $this->getInstance();
-        $this->assertEquals(array(), $i->getGroupMembership());
+        $this->assertEquals([], $i->getGroupMembership());
 
     }
 
     function testSetGroupMemberSet() {
 
         $i = $this->getInstance();
-        $i->setGroupMemberSet(array('principals/foo'));
+        $i->setGroupMemberSet(['principals/foo']);
 
-        $expected = array(
-            $i->getPrincipalUrl() => array('principals/foo')
-        );
+        $expected = [
+            $i->getPrincipalUrl() => ['principals/foo']
+        ];
 
         $this->assertEquals($expected, $this->backend->groupMembers);
 
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyWriteTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyWriteTest.php
index c0186ff0d..6cdb9b30e 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyWriteTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/ProxyWriteTest.php
@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\CalDAV\Principal;
+
 use Sabre\DAVACL;
 
 class ProxyWriteTest extends ProxyReadTest {
@@ -8,9 +9,9 @@ class ProxyWriteTest extends ProxyReadTest {
     function getInstance() {
 
         $backend = new DAVACL\PrincipalBackend\Mock();
-        $principal = new ProxyWrite($backend, array(
+        $principal = new ProxyWrite($backend, [
             'uri' => 'principal/user',
-        ));
+        ]);
         $this->backend = $backend;
         return $principal;
 
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/UserTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/UserTest.php
index 37b5eae97..420bb3b1a 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/UserTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Principal/UserTest.php
@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\CalDAV\Principal;
+
 use Sabre\DAVACL;
 
 class UserTest extends \PHPUnit_Framework_TestCase {
@@ -8,18 +9,18 @@ class UserTest extends \PHPUnit_Framework_TestCase {
     function getInstance() {
 
         $backend = new DAVACL\PrincipalBackend\Mock();
-        $backend->addPrincipal(array(
+        $backend->addPrincipal([
             'uri' => 'principals/user/calendar-proxy-read',
-        ));
-        $backend->addPrincipal(array(
+        ]);
+        $backend->addPrincipal([
             'uri' => 'principals/user/calendar-proxy-write',
-        ));
-        $backend->addPrincipal(array(
+        ]);
+        $backend->addPrincipal([
             'uri' => 'principals/user/random',
-        ));
-        return new User($backend, array(
+        ]);
+        return new User($backend, [
             'uri' => 'principals/user',
-        ));
+        ]);
 
     }
 
@@ -100,23 +101,23 @@ class UserTest extends \PHPUnit_Framework_TestCase {
 
     function testGetACL() {
 
-        $expected = array(
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => '{DAV:}authenticated',
+        $expected = [
+            [
+                'privilege' => '{DAV:}all',
+                'principal' => '{DAV:}owner',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/user/calendar-proxy-read',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/user/calendar-proxy-write',
                 'protected' => true,
-            ),
-        );
+            ],
+        ];
 
         $u = $this->getInstance();
         $this->assertEquals($expected, $u->getACL());
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/Schedule/OutboxTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/Schedule/OutboxTest.php
index 933c7157b..04d4b1237 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/Schedule/OutboxTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/Schedule/OutboxTest.php
@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\CalDAV\Schedule;
+
 use Sabre\CalDAV;
 use Sabre\DAV;
 
@@ -10,80 +11,38 @@ class OutboxTest extends \PHPUnit_Framework_TestCase {
 
         $outbox = new Outbox('principals/user1');
         $this->assertEquals('outbox', $outbox->getName());
-        $this->assertEquals(array(), $outbox->getChildren());
+        $this->assertEquals([], $outbox->getChildren());
         $this->assertEquals('principals/user1', $outbox->getOwner());
         $this->assertEquals(null, $outbox->getGroup());
 
-        $this->assertEquals(array(
-            array(
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-query-freebusy',
-                'principal' => 'principals/user1',
-                'protected' => true,
-            ),
-
-            array(
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-post-vevent',
+        $this->assertEquals([
+            [
+                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-send',
                 'principal' => 'principals/user1',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/user1',
                 'protected' => true,
-            ),
-            array(
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-query-freebusy',
+            ],
+            [
+                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-send',
                 'principal' => 'principals/user1/calendar-proxy-write',
                 'protected' => true,
-            ),
-            array(
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-post-vevent',
-                'principal' => 'principals/user1/calendar-proxy-write',
-                'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/user1/calendar-proxy-read',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/user1/calendar-proxy-write',
                 'protected' => true,
-            ),
-        ), $outbox->getACL());
-
-        $ok = false;
-        try {
-            $outbox->setACL(array());
-        } catch (DAV\Exception\MethodNotAllowed $e) {
-            $ok = true;
-        }
-        if (!$ok) {
-            $this->fail('Exception was not emitted');
-        }
-
-    }
-
-    function testGetSupportedPrivilegeSet() {
-
-        $outbox = new Outbox('principals/user1');
-        $r = $outbox->getSupportedPrivilegeSet();
-
-        $ok = 0;
-        foreach($r['aggregates'] as $priv) {
-
-            if ($priv['privilege'] == '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-query-freebusy') {
-                $ok++;
-            }
-            if ($priv['privilege'] == '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-post-vevent') {
-                $ok++;
-            }
-        }
-
-        $this->assertEquals(2, $ok, "We're missing one or more privileges");
+            ],
+        ], $outbox->getACL());
 
     }
 
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/ShareableCalendarTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/ShareableCalendarTest.php
deleted file mode 100644
index 15b869d50..000000000
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/ShareableCalendarTest.php
+++ /dev/null
@@ -1,60 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-use Sabre\DAVACL;
-
-class ShareableCalendarTest extends \PHPUnit_Framework_TestCase {
-
-    protected $backend;
-    protected $instance;
-
-    function setUp() {
-
-        $props = array(
-            'id' => 1,
-        );
-
-        $this->backend = new Backend\MockSharing(
-            array($props)
-        );
-        $this->backend->updateShares(1, array(
-            array(
-                'href' => 'mailto:removeme@example.org',
-                'commonName' => 'To be removed',
-                'readOnly' => true,
-            ),
-        ), array());
-
-        $this->instance = new ShareableCalendar($this->backend, $props);
-
-    }
-
-    function testUpdateShares() {
-
-        $this->instance->updateShares(array(
-            array(
-                'href' => 'mailto:test@example.org',
-                'commonName' => 'Foo Bar',
-                'summary' => 'Booh',
-                'readOnly' => false,
-            ),
-        ), array('mailto:removeme@example.org'));
-
-        $this->assertEquals(array(array(
-            'href' => 'mailto:test@example.org',
-            'commonName' => 'Foo Bar',
-            'summary' => 'Booh',
-            'readOnly' => false,
-            'status' => SharingPlugin::STATUS_NORESPONSE,
-        )), $this->instance->getShares());
-
-    }
-
-    function testPublish() {
-
-        $this->assertNull($this->instance->setPublishStatus(true));
-        $this->assertNull($this->instance->setPublishStatus(false));
-
-    }
-}
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/SharedCalendarTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/SharedCalendarTest.php
index 337b658f4..f71c19523 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/SharedCalendarTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/SharedCalendarTest.php
@@ -2,7 +2,8 @@
 
 namespace Sabre\CalDAV;
 
-use Sabre\DAVACL;
+use Sabre\DAV\Sharing;
+use Sabre\DAV\Xml\Element\Sharee;
 
 class SharedCalendarTest extends \PHPUnit_Framework_TestCase {
 
@@ -11,96 +12,95 @@ class SharedCalendarTest extends \PHPUnit_Framework_TestCase {
     function getInstance(array $props = null) {
 
         if (is_null($props)) {
-            $props = array(
-                'id' => 1,
+            $props = [
+                'id'                                        => 1,
                 '{http://calendarserver.org/ns/}shared-url' => 'calendars/owner/original',
-                '{http://sabredav.org/ns}owner-principal' => 'principals/owner',
-                '{http://sabredav.org/ns}read-only' => false,
-                'principaluri' => 'principals/sharee',
-            );
+                '{http://sabredav.org/ns}owner-principal'   => 'principals/owner',
+                '{http://sabredav.org/ns}read-only'         => false,
+                'share-access'                              => Sharing\Plugin::ACCESS_READWRITE,
+                'principaluri'                              => 'principals/sharee',
+            ];
         }
 
         $this->backend = new Backend\MockSharing(
-            array($props),
-            array(),
-            array()
+            [$props],
+            [],
+            []
         );
-        $this->backend->updateShares(1, array(
-            array(
-                'href' => 'mailto:removeme@example.org',
-                'commonName' => 'To be removed',
-                'readOnly' => true,
-            ),
-        ), array());
+
+        $sharee = new Sharee();
+        $sharee->href = 'mailto:removeme@example.org';
+        $sharee->properties['{DAV:}displayname'] = 'To be removed';
+        $sharee->access = Sharing\Plugin::ACCESS_READ;
+        $this->backend->updateInvites(1, [$sharee]);
 
         return new SharedCalendar($this->backend, $props);
 
     }
 
-    function testGetSharedUrl() {
-        $this->assertEquals('calendars/owner/original', $this->getInstance()->getSharedUrl());
-    }
+    function testGetInvites() {
 
-    function testGetShares() {
+        $sharee = new Sharee();
+        $sharee->href = 'mailto:removeme@example.org';
+        $sharee->properties['{DAV:}displayname'] = 'To be removed';
+        $sharee->access = Sharing\Plugin::ACCESS_READ;
+        $sharee->inviteStatus = Sharing\Plugin::INVITE_NORESPONSE;
 
-        $this->assertEquals(array(array(
-            'href' => 'mailto:removeme@example.org',
-            'commonName' => 'To be removed',
-            'readOnly' => true,
-            'status' => SharingPlugin::STATUS_NORESPONSE,
-        )), $this->getInstance()->getShares());
+        $this->assertEquals(
+            [$sharee],
+            $this->getInstance()->getInvites()
+        );
 
     }
 
     function testGetOwner() {
-        $this->assertEquals('principals/owner', $this->getInstance()->getOwner());
+        $this->assertEquals('principals/sharee', $this->getInstance()->getOwner());
     }
 
     function testGetACL() {
 
-        $expected = array(
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/owner',
+        $expected = [
+            [
+                'privilege' => '{DAV:}write',
+                'principal' => 'principals/sharee',
                 'protected' => true,
-            ),
-
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/owner/calendar-proxy-write',
+            ],
+            [
+                'privilege' => '{DAV:}write',
+                'principal' => 'principals/sharee/calendar-proxy-write',
                 'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/owner/calendar-proxy-read',
+            ],
+            [
+                'privilege' => '{DAV:}write-properties',
+                'principal' => 'principals/sharee',
                 'protected' => true,
-            ),
-            array(
-                'privilege' => '{' . Plugin::NS_CALDAV . '}read-free-busy',
-                'principal' => '{DAV:}authenticated',
+            ],
+            [
+                'privilege' => '{DAV:}write-properties',
+                'principal' => 'principals/sharee/calendar-proxy-write',
                 'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => 'principals/owner',
+            ],
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => 'principals/sharee',
                 'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => 'principals/owner/calendar-proxy-write',
+            ],
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => 'principals/sharee/calendar-proxy-read',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
-                'principal' => 'principals/sharee',
+                'principal' => 'principals/sharee/calendar-proxy-write',
                 'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => 'principals/sharee',
+            ],
+            [
+                'privilege' => '{' . Plugin::NS_CALDAV . '}read-free-busy',
+                'principal' => '{DAV:}authenticated',
                 'protected' => true,
-            ),
-        );
+            ],
+        ];
 
         $this->assertEquals($expected, $this->getInstance()->getACL());
 
@@ -108,96 +108,69 @@ class SharedCalendarTest extends \PHPUnit_Framework_TestCase {
 
     function testGetChildACL() {
 
-        $expected = array(
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/owner',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/owner/calendar-proxy-write',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/owner/calendar-proxy-read',
-                'protected' => true,
-            ),
-            array(
+        $expected = [
+            [
                 'privilege' => '{DAV:}write',
-                'principal' => 'principals/owner',
+                'principal' => 'principals/sharee',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}write',
-                'principal' => 'principals/owner/calendar-proxy-write',
+                'principal' => 'principals/sharee/calendar-proxy-write',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/sharee',
                 'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => 'principals/sharee',
+            ],
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => 'principals/sharee/calendar-proxy-write',
                 'protected' => true,
-            ),
-        );
+            ],
+            [
+                'privilege' => '{DAV:}read',
+                'principal' => 'principals/sharee/calendar-proxy-read',
+                'protected' => true,
+            ],
+
+        ];
 
         $this->assertEquals($expected, $this->getInstance()->getChildACL());
 
     }
 
-    function testGetChildACLReadOnly() {
+    function testUpdateInvites() {
 
-        $expected = array(
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/owner',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/owner/calendar-proxy-write',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/owner/calendar-proxy-read',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/sharee',
-                'protected' => true,
-            ),
-        );
+        $instance = $this->getInstance();
+        $newSharees = [
+            new Sharee(),
+            new Sharee()
+        ];
+        $newSharees[0]->href = 'mailto:test@example.org';
+        $newSharees[0]->properties['{DAV:}displayname'] = 'Foo Bar';
+        $newSharees[0]->comment = 'Booh';
+        $newSharees[0]->access = Sharing\Plugin::ACCESS_READWRITE;
 
-        $props = array(
-            'id' => 1,
-            '{http://calendarserver.org/ns/}shared-url' => 'calendars/owner/original',
-            '{http://sabredav.org/ns}owner-principal' => 'principals/owner',
-            '{http://sabredav.org/ns}read-only' => true,
-            'principaluri' => 'principals/sharee',
-        );
-        $this->assertEquals($expected, $this->getInstance($props)->getChildACL());
+        $newSharees[1]->href = 'mailto:removeme@example.org';
+        $newSharees[1]->access = Sharing\Plugin::ACCESS_NOACCESS;
+
+        $instance->updateInvites($newSharees);
+
+        $expected = [
+            clone $newSharees[0]
+        ];
+        $expected[0]->inviteStatus = Sharing\Plugin::INVITE_NORESPONSE;
+        $this->assertEquals($expected, $instance->getInvites());
 
     }
 
-    /**
-     * @expectedException InvalidArgumentException
-     */
-    public function testCreateInstanceMissingArg() {
+    function testPublish() {
 
-        $this->getInstance(array(
-            'id' => 1,
-            '{http://calendarserver.org/ns/}shared-url' => 'calendars/owner/original',
-            '{http://sabredav.org/ns}read-only' => false,
-            'principaluri' => 'principals/sharee',
-        ));
+        $instance = $this->getInstance();
+        $this->assertNull($instance->setPublishStatus(true));
+        $this->assertNull($instance->setPublishStatus(false));
 
     }
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/SharingPluginTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/SharingPluginTest.php
index b4270da7d..6e9e88419 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/SharingPluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/SharingPluginTest.php
@@ -3,6 +3,7 @@
 namespace Sabre\CalDAV;
 
 use Sabre\DAV;
+use Sabre\DAV\Xml\Element\Sharee;
 use Sabre\HTTP;
 
 class SharingPluginTest extends \Sabre\DAVServerTest {
@@ -14,31 +15,28 @@ class SharingPluginTest extends \Sabre\DAVServerTest {
 
     function setUp() {
 
-        $this->caldavCalendars = array(
-            array(
+        $this->caldavCalendars = [
+            [
                 'principaluri' => 'principals/user1',
-                'id' => 1,
-                'uri' => 'cal1',
-            ),
-            array(
+                'id'           => 1,
+                'uri'          => 'cal1',
+            ],
+            [
                 'principaluri' => 'principals/user1',
-                'id' => 2,
-                'uri' => 'cal2',
-                '{' . Plugin::NS_CALENDARSERVER . '}shared-url' => 'calendars/user1/cal2',
-                '{http://sabredav.org/ns}owner-principal' => 'principals/user2',
-                '{http://sabredav.org/ns}read-only' => 'true',
-            ),
-            array(
+                'id'           => 2,
+                'uri'          => 'cal2',
+                'share-access' => \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE,
+            ],
+            [
                 'principaluri' => 'principals/user1',
-                'id' => 3,
-                'uri' => 'cal3',
-            ),
-        );
+                'id'           => 3,
+                'uri'          => 'cal3',
+            ],
+        ];
 
         parent::setUp();
 
         // Making the logged in user an admin, for full access:
-        $this->aclPlugin->adminPrincipals[] = 'principals/user1';
         $this->aclPlugin->adminPrincipals[] = 'principals/user2';
 
     }
@@ -53,9 +51,21 @@ class SharingPluginTest extends \Sabre\DAVServerTest {
 
     }
 
+    /**
+     * @expectedException \LogicException
+     */
+    function testSetupWithoutCoreSharingPlugin() {
+
+        $server = new DAV\Server();
+        $server->addPlugin(
+            new SharingPlugin()
+        );
+
+    }
+
     function testGetFeatures() {
 
-        $this->assertEquals(array('calendarserver-sharing'), $this->caldavSharingPlugin->getFeatures());
+        $this->assertEquals(['calendarserver-sharing'], $this->caldavSharingPlugin->getFeatures());
 
     }
 
@@ -63,10 +73,10 @@ class SharingPluginTest extends \Sabre\DAVServerTest {
 
         // Forcing the server to authenticate:
         $this->authPlugin->beforeMethod(new HTTP\Request(), new HTTP\Response());
-        $props = $this->server->getProperties('calendars/user1/cal1', array(
+        $props = $this->server->getProperties('calendars/user1/cal1', [
             '{' . Plugin::NS_CALENDARSERVER . '}invite',
             '{' . Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes',
-        ));
+        ]);
 
         $this->assertInstanceOf('Sabre\\CalDAV\\Xml\\Property\\Invite', $props['{' . Plugin::NS_CALENDARSERVER . '}invite']);
         $this->assertInstanceOf('Sabre\\CalDAV\\Xml\\Property\\AllowedSharingModes', $props['{' . Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes']);
@@ -75,56 +85,55 @@ class SharingPluginTest extends \Sabre\DAVServerTest {
 
     function testBeforeGetSharedCalendar() {
 
-        $props = $this->server->getProperties('calendars/user1/cal2', array(
+        $props = $this->server->getProperties('calendars/user1/cal2', [
             '{' . Plugin::NS_CALENDARSERVER . '}shared-url',
             '{' . Plugin::NS_CALENDARSERVER . '}invite',
-        ));
+        ]);
 
         $this->assertInstanceOf('Sabre\\CalDAV\\Xml\\Property\\Invite', $props['{' . Plugin::NS_CALENDARSERVER . '}invite']);
-        $this->assertInstanceOf('Sabre\\DAV\\Xml\\Property\\Href', $props['{' . Plugin::NS_CALENDARSERVER . '}shared-url']);
+        //$this->assertInstanceOf('Sabre\\DAV\\Xml\\Property\\Href', $props['{' . Plugin::NS_CALENDARSERVER . '}shared-url']);
 
     }
 
-    function testUpdateProperties() {
+    function testUpdateResourceType() {
 
-        $this->caldavBackend->updateShares(1,
-            array(
-                array(
+        $this->caldavBackend->updateInvites(1,
+            [
+                new Sharee([
                     'href' => 'mailto:joe@example.org',
-                ),
-            ),
-            array()
+                ])
+            ]
         );
-        $result = $this->server->updateProperties('calendars/user1/cal1', array(
+        $result = $this->server->updateProperties('calendars/user1/cal1', [
             '{DAV:}resourcetype' => new DAV\Xml\Property\ResourceType(['{DAV:}collection'])
-        ));
+        ]);
 
         $this->assertEquals([
             '{DAV:}resourcetype' => 200
         ], $result);
 
-        $this->assertEquals(0, count($this->caldavBackend->getShares(1)));
+        $this->assertEquals(0, count($this->caldavBackend->getInvites(1)));
 
     }
 
     function testUpdatePropertiesPassThru() {
 
-        $result = $this->server->updateProperties('calendars/user1/cal3', array(
+        $result = $this->server->updateProperties('calendars/user1/cal3', [
             '{DAV:}foo' => 'bar',
-        ));
+        ]);
 
-        $this->assertEquals(array(
-            '{DAV:}foo' => 403,
-        ), $result);
+        $this->assertEquals([
+            '{DAV:}foo' => 200,
+        ], $result);
 
     }
 
     function testUnknownMethodNoPOST() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PATCH',
             'REQUEST_URI'    => '/',
-        ));
+        ]);
 
         $response = $this->request($request);
 
@@ -134,11 +143,11 @@ class SharingPluginTest extends \Sabre\DAVServerTest {
 
     function testUnknownMethodNoXML() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'POST',
             'REQUEST_URI'    => '/',
             'CONTENT_TYPE'   => 'text/plain',
-        ));
+        ]);
 
         $response = $this->request($request);
 
@@ -148,11 +157,11 @@ class SharingPluginTest extends \Sabre\DAVServerTest {
 
     function testUnknownMethodNoNode() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'POST',
             'REQUEST_URI'    => '/foo',
             'CONTENT_TYPE'   => 'text/xml',
-        ));
+        ]);
 
         $response = $this->request($request);
 
@@ -162,11 +171,7 @@ class SharingPluginTest extends \Sabre\DAVServerTest {
 
     function testShareRequest() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'POST',
-            'REQUEST_URI'    => '/calendars/user1/cal1',
-            'CONTENT_TYPE'   => 'text/xml',
-        ));
+        $request = new HTTP\Request('POST', '/calendars/user1/cal1', ['Content-Type' => 'text/xml']);
 
         $xml = <<<RRR
 <?xml version="1.0"?>
@@ -184,19 +189,28 @@ RRR;
 
         $request->setBody($xml);
 
-        $response = $this->request($request);
-        $this->assertEquals(200, $response->status, $response->body);
+        $response = $this->request($request, 200);
+
+        $this->assertEquals(
+            [
+                new Sharee([
+                    'href'         => 'mailto:joe@example.org',
+                    'properties'   => [
+                        '{DAV:}displayname' => 'Joe Shmoe',
+                    ],
+                    'access'       => \Sabre\DAV\Sharing\Plugin::ACCESS_READWRITE,
+                    'inviteStatus' => \Sabre\DAV\Sharing\Plugin::INVITE_NORESPONSE,
+                    'comment'      => '',
+                ]),
+            ],
+            $this->caldavBackend->getInvites(1)
+        );
 
-        $this->assertEquals(array(array(
-            'href' => 'mailto:joe@example.org',
-            'commonName' => 'Joe Shmoe',
-            'readOnly' => false,
-            'status' => SharingPlugin::STATUS_NORESPONSE,
-            'summary' => '',
-        )), $this->caldavBackend->getShares(1));
+        // Wiping out tree cache
+        $this->server->tree->markDirty('');
 
         // Verifying that the calendar is now marked shared.
-        $props = $this->server->getProperties('calendars/user1/cal1', array('{DAV:}resourcetype'));
+        $props = $this->server->getProperties('calendars/user1/cal1', ['{DAV:}resourcetype']);
         $this->assertTrue(
             $props['{DAV:}resourcetype']->is('{http://calendarserver.org/ns/}shared-owner')
         );
@@ -205,11 +219,11 @@ RRR;
 
     function testShareRequestNoShareableCalendar() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'POST',
-            'REQUEST_URI'    => '/calendars/user1/cal2',
-            'CONTENT_TYPE'   => 'text/xml',
-        ));
+        $request = new HTTP\Request(
+            'POST',
+            '/calendars/user1/cal2',
+            ['Content-Type' => 'text/xml']
+        );
 
         $xml = '<?xml version="1.0"?>
 <cs:share xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:">
@@ -226,18 +240,17 @@ RRR;
 
         $request->setBody($xml);
 
-        $response = $this->request($request);
-        $this->assertEquals(501, $response->status, $response->body);
+        $response = $this->request($request, 403);
 
     }
 
     function testInviteReply() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'POST',
             'REQUEST_URI'    => '/calendars/user1',
             'CONTENT_TYPE'   => 'text/xml',
-        ));
+        ]);
 
         $xml = '<?xml version="1.0"?>
 <cs:invite-reply xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:">
@@ -254,11 +267,11 @@ RRR;
 
     function testInviteBadXML() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'POST',
             'REQUEST_URI'    => '/calendars/user1',
             'CONTENT_TYPE'   => 'text/xml',
-        ));
+        ]);
 
         $xml = '<?xml version="1.0"?>
 <cs:invite-reply xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:">
@@ -272,11 +285,11 @@ RRR;
 
     function testInviteWrongUrl() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'POST',
             'REQUEST_URI'    => '/calendars/user1/cal1',
             'CONTENT_TYPE'   => 'text/xml',
-        ));
+        ]);
 
         $xml = '<?xml version="1.0"?>
 <cs:invite-reply xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:">
@@ -295,11 +308,7 @@ RRR;
 
     function testPublish() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'POST',
-            'REQUEST_URI'    => '/calendars/user1/cal1',
-            'CONTENT_TYPE'   => 'text/xml',
-        ));
+        $request = new HTTP\Request('POST', '/calendars/user1/cal1', ['Content-Type' => 'text/xml']);
 
         $xml = '<?xml version="1.0"?>
 <cs:publish-calendar xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:" />
@@ -312,13 +321,14 @@ RRR;
 
     }
 
+
     function testUnpublish() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'POST',
-            'REQUEST_URI'    => '/calendars/user1/cal1',
-            'CONTENT_TYPE'   => 'text/xml',
-        ));
+        $request = new HTTP\Request(
+            'POST',
+            '/calendars/user1/cal1',
+            ['Content-Type' => 'text/xml']
+        );
 
         $xml = '<?xml version="1.0"?>
 <cs:unpublish-calendar xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:" />
@@ -333,49 +343,46 @@ RRR;
 
     function testPublishWrongUrl() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'POST',
-            'REQUEST_URI'    => '/calendars/user1/cal2',
-            'CONTENT_TYPE'   => 'text/xml',
-        ));
+        $request = new HTTP\Request(
+            'POST',
+            '/calendars/user1',
+            ['Content-Type' => 'text/xml']
+        );
 
         $xml = '<?xml version="1.0"?>
 <cs:publish-calendar xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:" />
 ';
 
         $request->setBody($xml);
-
-        $response = $this->request($request);
-        $this->assertEquals(501, $response->status, $response->body);
+        $this->request($request, 501);
 
     }
 
     function testUnpublishWrongUrl() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'POST',
-            'REQUEST_URI'    => '/calendars/user1/cal2',
-            'CONTENT_TYPE'   => 'text/xml',
-        ));
-
+        $request = new HTTP\Request(
+            'POST',
+            '/calendars/user1',
+            ['Content-Type' => 'text/xml']
+        );
         $xml = '<?xml version="1.0"?>
 <cs:unpublish-calendar xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:" />
 ';
 
         $request->setBody($xml);
 
-        $response = $this->request($request);
-        $this->assertEquals(501, $response->status, $response->body);
+        $this->request($request, 501);
 
     }
 
     function testUnknownXmlDoc() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'POST',
-            'REQUEST_URI'    => '/calendars/user1/cal2',
-            'CONTENT_TYPE'   => 'text/xml',
-        ));
+
+        $request = new HTTP\Request(
+            'POST',
+            '/calendars/user1/cal2',
+            ['Content-Type' => 'text/xml']
+        );
 
         $xml = '<?xml version="1.0"?>
 <cs:foo-bar xmlns:cs="' . Plugin::NS_CALENDARSERVER . '" xmlns:d="DAV:" />';
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/TestUtil.php b/vendor/sabre/dav/tests/Sabre/CalDAV/TestUtil.php
index 19acea200..673d39c0a 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/TestUtil.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/TestUtil.php
@@ -6,48 +6,29 @@ class TestUtil {
 
     static function getBackend() {
 
-        $backend = new Backend\PDO(self::getSQLiteDB());
-        return $backend;
-
-    }
-
-    static function getSQLiteDB() {
-
-        if (file_exists(SABRE_TEMPDIR . '/testdb.sqlite'))
-            unlink(SABRE_TEMPDIR . '/testdb.sqlite');
-
-        $pdo = new \PDO('sqlite:' . SABRE_TEMPDIR . '/testdb.sqlite');
-        $pdo->setAttribute(\PDO::ATTR_ERRMODE,\PDO::ERRMODE_EXCEPTION);
-
-        // Yup this is definitely not 'fool proof', but good enough for now.
-        $queries = explode(';', file_get_contents(__DIR__ . '/../../../examples/sql/sqlite.calendars.sql'));
-        foreach($queries as $query) {
-            $pdo->exec($query);
-        }
-        // Inserting events through a backend class.
-        $backend = new Backend\PDO($pdo);
+        $backend = new Backend\Mock();
         $calendarId = $backend->createCalendar(
             'principals/user1',
             'UUID-123467',
-            array(
-                '{DAV:}displayname' => 'user1 calendar',
+            [
+                '{DAV:}displayname'                                   => 'user1 calendar',
                 '{urn:ietf:params:xml:ns:caldav}calendar-description' => 'Calendar description',
-                '{http://apple.com/ns/ical/}calendar-order' => '1',
-                '{http://apple.com/ns/ical/}calendar-color' => '#FF0000',
-            )
+                '{http://apple.com/ns/ical/}calendar-order'           => '1',
+                '{http://apple.com/ns/ical/}calendar-color'           => '#FF0000',
+            ]
         );
         $backend->createCalendar(
             'principals/user1',
             'UUID-123468',
-            array(
-                '{DAV:}displayname' => 'user1 calendar2',
+            [
+                '{DAV:}displayname'                                   => 'user1 calendar2',
                 '{urn:ietf:params:xml:ns:caldav}calendar-description' => 'Calendar description',
-                '{http://apple.com/ns/ical/}calendar-order' => '1',
-                '{http://apple.com/ns/ical/}calendar-color' => '#FF0000',
-            )
+                '{http://apple.com/ns/ical/}calendar-order'           => '1',
+                '{http://apple.com/ns/ical/}calendar-color'           => '#FF0000',
+            ]
         );
         $backend->createCalendarObject($calendarId, 'UUID-2345', self::getTestCalendarData());
-        return $pdo;
+        return $backend;
 
     }
 
@@ -80,37 +61,37 @@ TRANSP:TRANSPARENT
 SUMMARY:Something here
 DTSTAMP:20100228T130202Z';
 
-        switch($type) {
+        switch ($type) {
             case 1 :
-                $calendarData.="\nDTSTART;TZID=Asia/Seoul:20100223T060000\nDTEND;TZID=Asia/Seoul:20100223T070000\n";
+                $calendarData .= "\nDTSTART;TZID=Asia/Seoul:20100223T060000\nDTEND;TZID=Asia/Seoul:20100223T070000\n";
                 break;
             case 2 :
-                $calendarData.="\nDTSTART:20100223T060000\nDTEND:20100223T070000\n";
+                $calendarData .= "\nDTSTART:20100223T060000\nDTEND:20100223T070000\n";
                 break;
             case 3 :
-                $calendarData.="\nDTSTART;VALUE=DATE:20100223\nDTEND;VALUE=DATE:20100223\n";
+                $calendarData .= "\nDTSTART;VALUE=DATE:20100223\nDTEND;VALUE=DATE:20100223\n";
                 break;
             case 4 :
-                $calendarData.="\nDTSTART;TZID=Asia/Seoul:20100223T060000\nDURATION:PT1H\n";
+                $calendarData .= "\nDTSTART;TZID=Asia/Seoul:20100223T060000\nDURATION:PT1H\n";
                 break;
             case 5 :
-                $calendarData.="\nDTSTART;TZID=Asia/Seoul:20100223T060000\nDURATION:-P5D\n";
+                $calendarData .= "\nDTSTART;TZID=Asia/Seoul:20100223T060000\nDURATION:-P5D\n";
                 break;
             case 6 :
-                $calendarData.="\nDTSTART;VALUE=DATE:20100223\n";
+                $calendarData .= "\nDTSTART;VALUE=DATE:20100223\n";
                 break;
             case 7 :
-                $calendarData.="\nDTSTART;VALUE=DATETIME:20100223T060000\n";
+                $calendarData .= "\nDTSTART;VALUE=DATETIME:20100223T060000\n";
                 break;
 
             // No DTSTART, so intentionally broken
             case 'X' :
-                $calendarData.="\n";
+                $calendarData .= "\n";
                 break;
         }
 
 
-        $calendarData.='ATTENDEE;PARTSTAT=NEEDS-ACTION:mailto:lisa@example.com
+        $calendarData .= 'ATTENDEE;PARTSTAT=NEEDS-ACTION:mailto:lisa@example.com
 SEQUENCE:2
 END:VEVENT
 END:VCALENDAR';
@@ -121,7 +102,7 @@ END:VCALENDAR';
 
     static function getTestTODO($type = 'due') {
 
-        switch($type) {
+        switch ($type) {
 
             case 'due' :
                 $extra = "DUE:20100104T000000Z";
diff --git a/vendor/sabre/dav/tests/Sabre/CalDAV/ValidateICalTest.php b/vendor/sabre/dav/tests/Sabre/CalDAV/ValidateICalTest.php
index be166d9e6..629df90c1 100644
--- a/vendor/sabre/dav/tests/Sabre/CalDAV/ValidateICalTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CalDAV/ValidateICalTest.php
@@ -21,20 +21,20 @@ class ValidateICalTest extends \PHPUnit_Framework_TestCase {
 
     function setUp() {
 
-        $calendars = array(
-            array(
-                'id' => 'calendar1',
-                'principaluri' => 'principals/admin',
-                'uri' => 'calendar1',
-                '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => new Xml\Property\SupportedCalendarComponentSet( ['VEVENT','VTODO','VJOURNAL'] ),
-            ),
-            array(
-                'id' => 'calendar2',
-                'principaluri' => 'principals/admin',
-                'uri' => 'calendar2',
-                '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => new Xml\Property\SupportedCalendarComponentSet( ['VTODO','VJOURNAL'] ),
-            )
-        );
+        $calendars = [
+            [
+                'id'                                                              => 'calendar1',
+                'principaluri'                                                    => 'principals/admin',
+                'uri'                                                             => 'calendar1',
+                '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => new Xml\Property\SupportedCalendarComponentSet(['VEVENT', 'VTODO', 'VJOURNAL']),
+            ],
+            [
+                'id'                                                              => 'calendar2',
+                'principaluri'                                                    => 'principals/admin',
+                'uri'                                                             => 'calendar2',
+                '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set' => new Xml\Property\SupportedCalendarComponentSet(['VTODO', 'VJOURNAL']),
+            ]
+        ];
 
         $this->calBackend = new Backend\Mock($calendars, []);
         $principalBackend = new DAVACL\PrincipalBackend\Mock();
@@ -66,10 +66,10 @@ class ValidateICalTest extends \PHPUnit_Framework_TestCase {
 
     function testCreateFile() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
-        ));
+            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+        ]);
 
         $response = $this->request($request);
 
@@ -79,66 +79,168 @@ class ValidateICalTest extends \PHPUnit_Framework_TestCase {
 
     function testCreateFileValid() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
-        ));
-        $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $request = new HTTP\Request(
+            'PUT',
+            '/calendars/admin/calendar1/blabla.ics',
+            ['Prefer' => 'handling=strict']
+        );
+
+        $ics = <<<ICS
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:foo
+BEGIN:VEVENT
+UID:foo
+DTSTAMP:20160406T052348Z
+DTSTART:20160706T140000Z
+END:VEVENT
+END:VCALENDAR
+ICS;
+
+        $request->setBody($ics);
 
         $response = $this->request($request);
 
         $this->assertEquals(201, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Length' => ['0'],
-            'ETag' => ['"' . md5("BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n") . '"'],
-        ), $response->getHeaders());
+            'Content-Length'  => ['0'],
+            'ETag'            => ['"' . md5($ics) . '"'],
+        ], $response->getHeaders());
 
-        $expected = array(
+        $expected = [
             'uri'          => 'blabla.ics',
-            'calendardata' => "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n",
+            'calendardata' => $ics,
             'calendarid'   => 'calendar1',
             'lastmodified' => null,
+        ];
+
+        $this->assertEquals($expected, $this->calBackend->getCalendarObject('calendar1', 'blabla.ics'));
+
+    }
+
+    function testCreateFileNoVersion() {
+
+        $request = new HTTP\Request(
+            'PUT',
+            '/calendars/admin/calendar1/blabla.ics',
+            ['Prefer' => 'handling=strict']
         );
 
-        $this->assertEquals($expected, $this->calBackend->getCalendarObject('calendar1','blabla.ics'));
+        $ics = <<<ICS
+BEGIN:VCALENDAR
+PRODID:foo
+BEGIN:VEVENT
+UID:foo
+DTSTAMP:20160406T052348Z
+DTSTART:20160706T140000Z
+END:VEVENT
+END:VCALENDAR
+ICS;
+
+        $request->setBody($ics);
+
+        $response = $this->request($request);
+
+        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
 
     }
 
-    function testCreateFileNoComponents() {
+    function testCreateFileNoVersionFixed() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
-        ));
-        $request->setBody("BEGIN:VCALENDAR\r\nEND:VCALENDAR\r\n");
+        $request = new HTTP\Request(
+            'PUT',
+            '/calendars/admin/calendar1/blabla.ics',
+            ['Prefer' => 'handling=lenient']
+        );
+
+        $ics = <<<ICS
+BEGIN:VCALENDAR
+PRODID:foo
+BEGIN:VEVENT
+UID:foo
+DTSTAMP:20160406T052348Z
+DTSTART:20160706T140000Z
+END:VEVENT
+END:VCALENDAR
+ICS;
+
+        $request->setBody($ics);
 
         $response = $this->request($request);
 
-        $this->assertEquals(400, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
+        $this->assertEquals(201, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
+        $this->assertEquals([
+            'X-Sabre-Version'  => [DAV\Version::VERSION],
+            'Content-Length'   => ['0'],
+            'X-Sabre-Ew-Gross' => ['iCalendar validation warning: VERSION MUST appear exactly once in a VCALENDAR component'],
+        ], $response->getHeaders());
+
+        $ics = <<<ICS
+BEGIN:VCALENDAR\r
+VERSION:2.0\r
+PRODID:foo\r
+BEGIN:VEVENT\r
+UID:foo\r
+DTSTAMP:20160406T052348Z\r
+DTSTART:20160706T140000Z\r
+END:VEVENT\r
+END:VCALENDAR\r
+
+ICS;
+
+        $expected = [
+            'uri'          => 'blabla.ics',
+            'calendardata' => $ics,
+            'calendarid'   => 'calendar1',
+            'lastmodified' => null,
+        ];
+
+        $this->assertEquals($expected, $this->calBackend->getCalendarObject('calendar1', 'blabla.ics'));
+
+    }
+
+    function testCreateFileNoComponents() {
+
+        $request = new HTTP\Request(
+            'PUT',
+            '/calendars/admin/calendar1/blabla.ics',
+            ['Prefer' => 'handling=strict']
+        );
+        $ics = <<<ICS
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:foo
+END:VCALENDAR
+ICS;
+
+        $request->setBody($ics);
+
+        $response = $this->request($request);
+        $this->assertEquals(403, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
 
     }
 
     function testCreateFileNoUID() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
-        ));
+            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+        ]);
         $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
 
-        $this->assertEquals(400, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
+        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
 
     }
 
     function testCreateFileVCard() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
-        ));
+            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+        ]);
         $request->setBody("BEGIN:VCARD\r\nEND:VCARD\r\n");
 
         $response = $this->request($request);
@@ -149,53 +251,53 @@ class ValidateICalTest extends \PHPUnit_Framework_TestCase {
 
     function testCreateFile2Components() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
-        ));
+            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+        ]);
         $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nBEGIN:VJOURNAL\r\nUID:foo\r\nEND:VJOURNAL\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
 
-        $this->assertEquals(400, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
+        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
 
     }
 
     function testCreateFile2UIDS() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
-        ));
+            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+        ]);
         $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VTIMEZONE\r\nEND:VTIMEZONE\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nBEGIN:VEVENT\r\nUID:bar\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
 
-        $this->assertEquals(400, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
+        $this->assertEquals(415, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
 
     }
 
     function testCreateFileWrongComponent() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
-        ));
+            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+        ]);
         $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VTIMEZONE\r\nEND:VTIMEZONE\r\nBEGIN:VFREEBUSY\r\nUID:foo\r\nEND:VFREEBUSY\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
 
-        $this->assertEquals(400, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
+        $this->assertEquals(403, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
 
     }
 
     function testUpdateFile() {
 
-        $this->calBackend->createCalendarObject('calendar1','blabla.ics','foo');
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $this->calBackend->createCalendarObject('calendar1', 'blabla.ics', 'foo');
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
-        ));
+            'REQUEST_URI'    => '/calendars/admin/calendar1/blabla.ics',
+        ]);
 
         $response = $this->request($request);
 
@@ -205,35 +307,45 @@ class ValidateICalTest extends \PHPUnit_Framework_TestCase {
 
     function testUpdateFileParsableBody() {
 
-        $this->calBackend->createCalendarObject('calendar1','blabla.ics','foo');
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
-        ));
-        $body = "BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n";
-        $request->setBody($body);
-
+        $this->calBackend->createCalendarObject('calendar1', 'blabla.ics', 'foo');
+        $request = new HTTP\Request(
+            'PUT',
+            '/calendars/admin/calendar1/blabla.ics'
+        );
+        $ics = <<<ICS
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:foo
+BEGIN:VEVENT
+UID:foo
+DTSTAMP:20160406T052348Z
+DTSTART:20160706T140000Z
+END:VEVENT
+END:VCALENDAR
+ICS;
+
+        $request->setBody($ics);
         $response = $this->request($request);
 
         $this->assertEquals(204, $response->status);
 
-        $expected = array(
+        $expected = [
             'uri'          => 'blabla.ics',
-            'calendardata' => $body,
+            'calendardata' => $ics,
             'calendarid'   => 'calendar1',
             'lastmodified' => null,
-        );
+        ];
 
-        $this->assertEquals($expected, $this->calBackend->getCalendarObject('calendar1','blabla.ics'));
+        $this->assertEquals($expected, $this->calBackend->getCalendarObject('calendar1', 'blabla.ics'));
 
     }
 
     function testCreateFileInvalidComponent() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/calendars/admin/calendar2/blabla.ics',
-        ));
+            'REQUEST_URI'    => '/calendars/admin/calendar2/blabla.ics',
+        ]);
         $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VTIMEZONE\r\nEND:VTIMEZONE\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
@@ -244,11 +356,11 @@ class ValidateICalTest extends \PHPUnit_Framework_TestCase {
 
     function testUpdateFileInvalidComponent() {
 
-        $this->calBackend->createCalendarObject('calendar2','blabla.ics','foo');
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $this->calBackend->createCalendarObject('calendar2', 'blabla.ics', 'foo');
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/calendars/admin/calendar2/blabla.ics',
-        ));
+            'REQUEST_URI'    => '/calendars/admin/calendar2/blabla.ics',
+        ]);
         $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VTIMEZONE\r\nEND:VTIMEZONE\r\nBEGIN:VEVENT\r\nUID:foo\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
@@ -266,11 +378,24 @@ class ValidateICalTest extends \PHPUnit_Framework_TestCase {
      */
     function testCreateFileModified() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/calendars/admin/calendar1/blabla.ics',
-        ));
-        $request->setBody("BEGIN:VCALENDAR\r\nBEGIN:VEVENT\r\nUID:foo\r\nSUMMARY:Meeting in M\xfcnster\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n");
+        $request = new HTTP\Request(
+            'PUT',
+            '/calendars/admin/calendar1/blabla.ics'
+        );
+        $ics = <<<ICS
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:foo
+BEGIN:VEVENT
+UID:foo
+SUMMARY:Meeting in M\xfcnster
+DTSTAMP:20160406T052348Z
+DTSTART:20160706T140000Z
+END:VEVENT
+END:VCALENDAR
+ICS;
+
+        $request->setBody($ics);
 
         $response = $this->request($request);
 
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/AbstractPluginTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/AbstractPluginTest.php
index a123099a0..552e2ba77 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/AbstractPluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/AbstractPluginTest.php
@@ -26,13 +26,13 @@ abstract class AbstractPluginTest extends \PHPUnit_Framework_TestCase {
         $this->backend = new Backend\Mock();
         $principalBackend = new DAVACL\PrincipalBackend\Mock();
 
-        $tree = array(
+        $tree = [
             new AddressBookRoot($principalBackend, $this->backend),
             new DAVACL\PrincipalCollection($principalBackend)
-        );
+        ];
 
         $this->plugin = new Plugin();
-        $this->plugin->directories = array('directory');
+        $this->plugin->directories = ['directory'];
         $this->server = new DAV\Server($tree);
         $this->server->sapi = new HTTP\SapiMock();
         $this->server->addPlugin($this->plugin);
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookQueryTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookQueryTest.php
index 478f6beb5..2c3171bf3 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookQueryTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookQueryTest.php
@@ -12,11 +12,11 @@ class AddressBookQueryTest extends AbstractPluginTest {
 
     function testQuery() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'REPORT',
-            'REQUEST_URI' => '/addressbooks/user1/book1',
-            'HTTP_DEPTH' => '1',
-        ));
+        $request = new HTTP\Request(
+            'REPORT',
+            '/addressbooks/user1/book1',
+            ['Depth' => '1']
+        );
 
         $request->setBody(
 '<?xml version="1.0"?>
@@ -40,33 +40,33 @@ class AddressBookQueryTest extends AbstractPluginTest {
         $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
 
         // using the client for parsing
-        $client = new DAV\Client(array('baseUri'=>'/'));
+        $client = new DAV\Client(['baseUri' => '/']);
 
         $result = $client->parseMultiStatus($response->body);
 
-        $this->assertEquals(array(
-            '/addressbooks/user1/book1/card1' => array(
-                200 => array(
+        $this->assertEquals([
+            '/addressbooks/user1/book1/card1' => [
+                200 => [
                     '{DAV:}getetag' => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
-                ),
-             ),
-            '/addressbooks/user1/book1/card2' => array(
-                404 => array(
+                ],
+             ],
+            '/addressbooks/user1/book1/card2' => [
+                404 => [
                     '{DAV:}getetag' => null,
-                ),
-            )
-        ), $result);
+                ],
+            ]
+        ], $result);
 
 
     }
 
     function testQueryDepth0() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'REPORT',
-            'REQUEST_URI' => '/addressbooks/user1/book1/card1',
-            'HTTP_DEPTH' => '0',
-        ));
+        $request = new HTTP\Request(
+            'REPORT',
+            '/addressbooks/user1/book1/card1',
+            ['Depth' => '0']
+        );
 
         $request->setBody(
 '<?xml version="1.0"?>
@@ -90,28 +90,28 @@ class AddressBookQueryTest extends AbstractPluginTest {
         $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
 
         // using the client for parsing
-        $client = new DAV\Client(array('baseUri'=>'/'));
+        $client = new DAV\Client(['baseUri' => '/']);
 
         $result = $client->parseMultiStatus($response->body);
 
-        $this->assertEquals(array(
-            '/addressbooks/user1/book1/card1' => array(
-                200 => array(
+        $this->assertEquals([
+            '/addressbooks/user1/book1/card1' => [
+                200 => [
                     '{DAV:}getetag' => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
-                ),
-             ),
-        ), $result);
+                ],
+             ],
+        ], $result);
 
 
     }
 
     function testQueryNoMatch() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'REPORT',
-            'REQUEST_URI' => '/addressbooks/user1/book1',
-            'HTTP_DEPTH' => '1',
-        ));
+        $request = new HTTP\Request(
+            'REPORT',
+            '/addressbooks/user1/book1',
+            ['Depth' => '1']
+        );
 
         $request->setBody(
 '<?xml version="1.0"?>
@@ -135,21 +135,21 @@ class AddressBookQueryTest extends AbstractPluginTest {
         $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
 
         // using the client for parsing
-        $client = new DAV\Client(array('baseUri'=>'/'));
+        $client = new DAV\Client(['baseUri' => '/']);
 
         $result = $client->parseMultiStatus($response->body);
 
-        $this->assertEquals(array(), $result);
+        $this->assertEquals([], $result);
 
     }
 
     function testQueryLimit() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'REPORT',
-            'REQUEST_URI' => '/addressbooks/user1/book1',
-            'HTTP_DEPTH' => '1',
-        ));
+            'REQUEST_URI'    => '/addressbooks/user1/book1',
+            'HTTP_DEPTH'     => '1',
+        ]);
 
         $request->setBody(
 '<?xml version="1.0"?>
@@ -174,17 +174,17 @@ class AddressBookQueryTest extends AbstractPluginTest {
         $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
 
         // using the client for parsing
-        $client = new DAV\Client(array('baseUri'=>'/'));
+        $client = new DAV\Client(['baseUri' => '/']);
 
         $result = $client->parseMultiStatus($response->body);
 
-        $this->assertEquals(array(
-            '/addressbooks/user1/book1/card1' => array(
-                200 => array(
-                    '{DAV:}getetag' => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD"). '"',
-                ),
-             ),
-        ), $result);
+        $this->assertEquals([
+            '/addressbooks/user1/book1/card1' => [
+                200 => [
+                    '{DAV:}getetag' => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
+                ],
+             ],
+        ], $result);
 
 
     }
@@ -217,20 +217,20 @@ class AddressBookQueryTest extends AbstractPluginTest {
         $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
 
         // using the client for parsing
-        $client = new DAV\Client(array('baseUri'=>'/'));
+        $client = new DAV\Client(['baseUri' => '/']);
 
         $result = $client->parseMultiStatus($response->body);
 
         $vobjVersion = \Sabre\VObject\Version::VERSION;
 
-        $this->assertEquals(array(
-            '/addressbooks/user1/book1/card1' => array(
-                200 => array(
-                    '{DAV:}getetag' => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD"). '"',
+        $this->assertEquals([
+            '/addressbooks/user1/book1/card1' => [
+                200 => [
+                    '{DAV:}getetag'                                => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
                     '{urn:ietf:params:xml:ns:carddav}address-data' => '["vcard",[["version",{},"text","4.0"],["prodid",{},"text","-\/\/Sabre\/\/Sabre VObject ' . $vobjVersion . '\/\/EN"],["uid",{},"text","12345"]]]',
-                ),
-             ),
-        ), $result);
+                ],
+             ],
+        ], $result);
 
     }
 
@@ -262,20 +262,20 @@ class AddressBookQueryTest extends AbstractPluginTest {
         $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
 
         // using the client for parsing
-        $client = new DAV\Client(array('baseUri'=>'/'));
+        $client = new DAV\Client(['baseUri' => '/']);
 
         $result = $client->parseMultiStatus($response->body);
 
         $vobjVersion = \Sabre\VObject\Version::VERSION;
 
-        $this->assertEquals(array(
-            '/addressbooks/user1/book1/card1' => array(
-                200 => array(
-                    '{DAV:}getetag' => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD"). '"',
+        $this->assertEquals([
+            '/addressbooks/user1/book1/card1' => [
+                200 => [
+                    '{DAV:}getetag'                                => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
                     '{urn:ietf:params:xml:ns:carddav}address-data' => "BEGIN:VCARD\r\nVERSION:4.0\r\nPRODID:-//Sabre//Sabre VObject $vobjVersion//EN\r\nUID:12345\r\nEND:VCARD\r\n",
-                ),
-             ),
-        ), $result);
+                ],
+             ],
+        ], $result);
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookTest.php
index fe8ba9025..1a36fd10c 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/AddressBookTest.php
@@ -4,10 +4,10 @@ namespace Sabre\CardDAV;
 
 use Sabre\DAV\PropPatch;
 
-require_once 'Sabre/CardDAV/Backend/Mock.php';
-
 class AddressBookTest extends \PHPUnit_Framework_TestCase {
 
+    use \Sabre\DAV\DbTestHelperTrait;
+
     /**
      * @var Sabre\CardDAV\AddressBook
      */
@@ -19,12 +19,12 @@ class AddressBookTest extends \PHPUnit_Framework_TestCase {
         $this->backend = new Backend\Mock();
         $this->ab = new AddressBook(
             $this->backend,
-            array(
-                'uri' => 'book1',
-                'id' => 'foo',
+            [
+                'uri'               => 'book1',
+                'id'                => 'foo',
                 '{DAV:}displayname' => 'd-name',
-                'principaluri' => 'principals/user1',
-            )
+                'principaluri'      => 'principals/user1',
+            ]
         );
 
     }
@@ -73,10 +73,10 @@ class AddressBookTest extends \PHPUnit_Framework_TestCase {
 
     function testCreateFile() {
 
-        $file = fopen('php://memory','r+');
-        fwrite($file,'foo');
+        $file = fopen('php://memory', 'r+');
+        fwrite($file, 'foo');
         rewind($file);
-        $this->ab->createFile('card2',$file);
+        $this->ab->createFile('card2', $file);
 
         $this->assertEquals('foo', $this->backend->cards['foo']['card2']);
 
@@ -85,7 +85,7 @@ class AddressBookTest extends \PHPUnit_Framework_TestCase {
     function testDelete() {
 
         $this->ab->delete();
-        $this->assertEquals(array(), $this->backend->addressBooks);
+        $this->assertEquals([], $this->backend->addressBooks);
 
     }
 
@@ -118,10 +118,10 @@ class AddressBookTest extends \PHPUnit_Framework_TestCase {
 
     function testGetProperties() {
 
-        $props = $this->ab->getProperties(array('{DAV:}displayname'));
-        $this->assertEquals(array(
+        $props = $this->ab->getProperties(['{DAV:}displayname']);
+        $this->assertEquals([
             '{DAV:}displayname' => 'd-name',
-        ), $props);
+        ], $props);
 
     }
 
@@ -129,27 +129,22 @@ class AddressBookTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertEquals('principals/user1', $this->ab->getOwner());
         $this->assertNull($this->ab->getGroup());
-        $this->assertEquals(array(
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/user1',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => 'principals/user1',
+        $this->assertEquals([
+            [
+                'privilege' => '{DAV:}all',
+                'principal' => '{DAV:}owner',
                 'protected' => true,
-            ),
-        ), $this->ab->getACL());
+            ],
+        ], $this->ab->getACL());
 
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\MethodNotAllowed
+     * @expectedException Sabre\DAV\Exception\Forbidden
      */
     function testSetACL() {
 
-       $this->ab->setACL(array());
+       $this->ab->setACL([]);
 
     }
 
@@ -168,45 +163,32 @@ class AddressBookTest extends \PHPUnit_Framework_TestCase {
     }
     function testGetChangesNoSyncSupport() {
 
-        $this->assertNull($this->ab->getChanges(1,null));
+        $this->assertNull($this->ab->getChanges(1, null));
 
     }
 
     function testGetSyncToken() {
 
-        if (!SABRE_HASSQLITE) {
-            $this->markTestSkipped('Sqlite is required for this test to run');
-        }
-        $ab = new AddressBook(TestUtil::getBackend(), [ 'id' => 1, '{DAV:}sync-token' => 2]);
+        $this->driver = 'sqlite';
+        $this->dropTables(['addressbooks', 'cards', 'addressbookchanges']);
+        $this->createSchema('addressbooks');
+        $backend = new Backend\PDO(
+            $this->getPDO()
+        );
+        $ab = new AddressBook($backend, [ 'id' => 1, '{DAV:}sync-token' => 2]);
         $this->assertEquals(2, $ab->getSyncToken());
-        TestUtil::deleteSQLiteDB();
     }
 
     function testGetSyncToken2() {
 
-        if (!SABRE_HASSQLITE) {
-            $this->markTestSkipped('Sqlite is required for this test to run');
-        }
-        $ab = new AddressBook(TestUtil::getBackend(), [ 'id' => 1, '{http://sabredav.org/ns}sync-token' => 2]);
+        $this->driver = 'sqlite';
+        $this->dropTables(['addressbooks', 'cards', 'addressbookchanges']);
+        $this->createSchema('addressbooks');
+        $backend = new Backend\PDO(
+            $this->getPDO()
+        );
+        $ab = new AddressBook($backend, [ 'id' => 1, '{http://sabredav.org/ns}sync-token' => 2]);
         $this->assertEquals(2, $ab->getSyncToken());
-        TestUtil::deleteSQLiteDB();
     }
 
-    function testGetChanges() {
-
-        if (!SABRE_HASSQLITE) {
-            $this->markTestSkipped('Sqlite is required for this test to run');
-        }
-        $ab = new AddressBook(TestUtil::getBackend(), [ 'id' => 1, '{DAV:}sync-token' => 2]);
-        $this->assertEquals([
-            'syncToken' => 2,
-            'modified' => [],
-            'deleted' => [],
-            'added' => ['UUID-2345'],
-        ], $ab->getChanges(1, 1));
-        TestUtil::deleteSQLiteDB();
-
-    }
-
-
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/AbstractPDOTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/AbstractPDOTest.php
index d2ec278be..f62bfb1ae 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/AbstractPDOTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/AbstractPDOTest.php
@@ -7,52 +7,55 @@ use Sabre\DAV\PropPatch;
 
 abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
+    use \Sabre\DAV\DbTestHelperTrait;
+
     /**
      * @var CardDAV\Backend\PDO
      */
     protected $backend;
 
-    /**
-     * @abstract
-     * @return PDO
-     */
-    abstract function getPDO();
-
-    public function setUp() {
+    function setUp() {
 
+        $this->dropTables([
+            'addressbooks',
+            'cards',
+            'addressbookchanges',
+        ]);
+        $this->createSchema('addressbooks');
         $pdo = $this->getPDO();
+
         $this->backend = new PDO($pdo);
-        $pdo->exec('INSERT INTO addressbooks (principaluri, displayname, uri, description, synctoken) VALUES ("principals/user1", "book1", "book1", "addressbook 1", 1)');
-        $pdo->exec('INSERT INTO cards (addressbookid, carddata, uri, lastmodified, etag, size) VALUES (1, "card1", "card1", 0, "' . md5('card1') . '", 5)');
+        $pdo->exec("INSERT INTO addressbooks (principaluri, displayname, uri, description, synctoken) VALUES ('principals/user1', 'book1', 'book1', 'addressbook 1', 1)");
+        $pdo->exec("INSERT INTO cards (addressbookid, carddata, uri, lastmodified, etag, size) VALUES (1, 'card1', 'card1', 0, '" . md5('card1') . "', 5)");
 
     }
 
-    public function testGetAddressBooksForUser() {
+    function testGetAddressBooksForUser() {
 
         $result = $this->backend->getAddressBooksForUser('principals/user1');
 
-        $expected = array(
-            array(
-                'id' => 1,
-                'uri' => 'book1',
-                'principaluri' => 'principals/user1',
-                '{DAV:}displayname' => 'book1',
+        $expected = [
+            [
+                'id'                                                          => 1,
+                'uri'                                                         => 'book1',
+                'principaluri'                                                => 'principals/user1',
+                '{DAV:}displayname'                                           => 'book1',
                 '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'addressbook 1',
-                '{http://calendarserver.org/ns/}getctag' => 1,
-                '{http://sabredav.org/ns}sync-token' => 1
-            )
-        );
+                '{http://calendarserver.org/ns/}getctag'                      => 1,
+                '{http://sabredav.org/ns}sync-token'                          => 1
+            ]
+        ];
 
         $this->assertEquals($expected, $result);
 
     }
 
-    public function testUpdateAddressBookInvalidProp() {
+    function testUpdateAddressBookInvalidProp() {
 
         $propPatch = new PropPatch([
-            '{DAV:}displayname' => 'updated',
+            '{DAV:}displayname'                                           => 'updated',
             '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'updated',
-            '{DAV:}foo' => 'bar',
+            '{DAV:}foo'                                                   => 'bar',
         ]);
 
         $this->backend->updateAddressBook(1, $propPatch);
@@ -62,23 +65,23 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $result = $this->backend->getAddressBooksForUser('principals/user1');
 
-        $expected = array(
-            array(
-                'id' => 1,
-                'uri' => 'book1',
-                'principaluri' => 'principals/user1',
-                '{DAV:}displayname' => 'book1',
+        $expected = [
+            [
+                'id'                                                          => 1,
+                'uri'                                                         => 'book1',
+                'principaluri'                                                => 'principals/user1',
+                '{DAV:}displayname'                                           => 'book1',
                 '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'addressbook 1',
-                '{http://calendarserver.org/ns/}getctag' => 1,
-                '{http://sabredav.org/ns}sync-token' => 1
-            )
-        );
+                '{http://calendarserver.org/ns/}getctag'                      => 1,
+                '{http://sabredav.org/ns}sync-token'                          => 1
+            ]
+        ];
 
         $this->assertEquals($expected, $result);
 
     }
 
-    public function testUpdateAddressBookNoProps() {
+    function testUpdateAddressBookNoProps() {
 
         $propPatch = new PropPatch([
         ]);
@@ -89,27 +92,27 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $result = $this->backend->getAddressBooksForUser('principals/user1');
 
-        $expected = array(
-            array(
-                'id' => 1,
-                'uri' => 'book1',
-                'principaluri' => 'principals/user1',
-                '{DAV:}displayname' => 'book1',
+        $expected = [
+            [
+                'id'                                                          => 1,
+                'uri'                                                         => 'book1',
+                'principaluri'                                                => 'principals/user1',
+                '{DAV:}displayname'                                           => 'book1',
                 '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'addressbook 1',
-                '{http://calendarserver.org/ns/}getctag' => 1,
-                '{http://sabredav.org/ns}sync-token' => 1
-            )
-        );
+                '{http://calendarserver.org/ns/}getctag'                      => 1,
+                '{http://sabredav.org/ns}sync-token'                          => 1
+            ]
+        ];
 
         $this->assertEquals($expected, $result);
 
 
     }
 
-    public function testUpdateAddressBookSuccess() {
+    function testUpdateAddressBookSuccess() {
 
         $propPatch = new PropPatch([
-            '{DAV:}displayname' => 'updated',
+            '{DAV:}displayname'                                           => 'updated',
             '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'updated',
         ]);
 
@@ -120,104 +123,108 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $result = $this->backend->getAddressBooksForUser('principals/user1');
 
-        $expected = array(
-            array(
-                'id' => 1,
-                'uri' => 'book1',
-                'principaluri' => 'principals/user1',
-                '{DAV:}displayname' => 'updated',
+        $expected = [
+            [
+                'id'                                                          => 1,
+                'uri'                                                         => 'book1',
+                'principaluri'                                                => 'principals/user1',
+                '{DAV:}displayname'                                           => 'updated',
                 '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'updated',
-                '{http://calendarserver.org/ns/}getctag' => 2,
-                '{http://sabredav.org/ns}sync-token' => 2
-            )
-        );
+                '{http://calendarserver.org/ns/}getctag'                      => 2,
+                '{http://sabredav.org/ns}sync-token'                          => 2
+            ]
+        ];
 
         $this->assertEquals($expected, $result);
 
 
     }
 
-    public function testDeleteAddressBook() {
+    function testDeleteAddressBook() {
 
         $this->backend->deleteAddressBook(1);
 
-        $this->assertEquals(array(), $this->backend->getAddressBooksForUser('principals/user1'));
+        $this->assertEquals([], $this->backend->getAddressBooksForUser('principals/user1'));
 
     }
 
     /**
      * @expectedException Sabre\DAV\Exception\BadRequest
      */
-    public function testCreateAddressBookUnsupportedProp() {
+    function testCreateAddressBookUnsupportedProp() {
 
-        $this->backend->createAddressBook('principals/user1','book2', array(
+        $this->backend->createAddressBook('principals/user1', 'book2', [
             '{DAV:}foo' => 'bar',
-        ));
+        ]);
 
     }
 
-    public function testCreateAddressBookSuccess() {
+    function testCreateAddressBookSuccess() {
 
-        $this->backend->createAddressBook('principals/user1','book2', array(
-            '{DAV:}displayname' => 'book2',
+        $this->backend->createAddressBook('principals/user1', 'book2', [
+            '{DAV:}displayname'                                           => 'book2',
             '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'addressbook 2',
-        ));
-
-        $expected = array(
-            array(
-                'id' => 1,
-                'uri' => 'book1',
-                'principaluri' => 'principals/user1',
-                '{DAV:}displayname' => 'book1',
+        ]);
+
+        $expected = [
+            [
+                'id'                                                          => 1,
+                'uri'                                                         => 'book1',
+                'principaluri'                                                => 'principals/user1',
+                '{DAV:}displayname'                                           => 'book1',
                 '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'addressbook 1',
-                '{http://calendarserver.org/ns/}getctag' => 1,
-                '{http://sabredav.org/ns}sync-token' => 1,
-            ),
-            array(
-                'id' => 2,
-                'uri' => 'book2',
-                'principaluri' => 'principals/user1',
-                '{DAV:}displayname' => 'book2',
+                '{http://calendarserver.org/ns/}getctag'                      => 1,
+                '{http://sabredav.org/ns}sync-token'                          => 1,
+            ],
+            [
+                'id'                                                          => 2,
+                'uri'                                                         => 'book2',
+                'principaluri'                                                => 'principals/user1',
+                '{DAV:}displayname'                                           => 'book2',
                 '{' . CardDAV\Plugin::NS_CARDDAV . '}addressbook-description' => 'addressbook 2',
-                '{http://calendarserver.org/ns/}getctag' => 1,
-                '{http://sabredav.org/ns}sync-token' => 1,
-            )
-        );
+                '{http://calendarserver.org/ns/}getctag'                      => 1,
+                '{http://sabredav.org/ns}sync-token'                          => 1,
+            ]
+        ];
         $result = $this->backend->getAddressBooksForUser('principals/user1');
         $this->assertEquals($expected, $result);
 
     }
 
-    public function testGetCards() {
+    function testGetCards() {
 
         $result = $this->backend->getCards(1);
 
-        $expected = array(
-            array(
-                'id' => 1,
-                'uri' => 'card1',
+        $expected = [
+            [
+                'id'           => 1,
+                'uri'          => 'card1',
                 'lastmodified' => 0,
-                'etag' => '"' . md5('card1') . '"',
-                'size' => 5
-            )
-        );
+                'etag'         => '"' . md5('card1') . '"',
+                'size'         => 5
+            ]
+        ];
 
         $this->assertEquals($expected, $result);
 
     }
 
-    public function testGetCard() {
+    function testGetCard() {
 
-        $result = $this->backend->getCard(1,'card1');
+        $result = $this->backend->getCard(1, 'card1');
 
-        $expected = array(
-            'id' => 1,
-            'uri' => 'card1',
-            'carddata' => 'card1',
+        $expected = [
+            'id'           => 1,
+            'uri'          => 'card1',
+            'carddata'     => 'card1',
             'lastmodified' => 0,
-            'etag' => '"' . md5('card1') . '"',
-            'size' => 5
-        );
+            'etag'         => '"' . md5('card1') . '"',
+            'size'         => 5
+        ];
+
+        if (is_resource($result['carddata'])) {
+            $result['carddata'] = stream_get_contents($result['carddata']);
+        }
 
         $this->assertEquals($expected, $result);
 
@@ -226,13 +233,16 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
     /**
      * @depends testGetCard
      */
-    public function testCreateCard() {
+    function testCreateCard() {
 
         $result = $this->backend->createCard(1, 'card2', 'data2');
         $this->assertEquals('"' . md5('data2') . '"', $result);
-        $result = $this->backend->getCard(1,'card2');
+        $result = $this->backend->getCard(1, 'card2');
         $this->assertEquals(2, $result['id']);
         $this->assertEquals('card2', $result['uri']);
+        if (is_resource($result['carddata'])) {
+            $result['carddata'] = stream_get_contents($result['carddata']);
+        }
         $this->assertEquals('data2', $result['carddata']);
 
     }
@@ -240,41 +250,52 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
     /**
      * @depends testCreateCard
      */
-    public function testGetMultiple() {
+    function testGetMultiple() {
 
         $result = $this->backend->createCard(1, 'card2', 'data2');
         $result = $this->backend->createCard(1, 'card3', 'data3');
         $check = [
             [
-                'id' => 1,
-                'uri' => 'card1',
-                'carddata' => 'card1',
+                'id'           => 1,
+                'uri'          => 'card1',
+                'carddata'     => 'card1',
                 'lastmodified' => 0,
             ],
             [
-                'id' => 2,
-                'uri' => 'card2',
-                'carddata' => 'data2',
+                'id'           => 2,
+                'uri'          => 'card2',
+                'carddata'     => 'data2',
                 'lastmodified' => time(),
             ],
             [
-                'id' => 3,
-                'uri' => 'card3',
-                'carddata' => 'data3',
+                'id'           => 3,
+                'uri'          => 'card3',
+                'carddata'     => 'data3',
                 'lastmodified' => time(),
             ],
         ];
 
-        $result = $this->backend->getMultipleCards(1, ['card1','card2','card3']);
+        $result = $this->backend->getMultipleCards(1, ['card1', 'card2', 'card3']);
+
+        foreach ($check as $index => $node) {
 
-        foreach($check as $index=>$node) {
+            foreach ($node as $k => $v) {
 
-            foreach($node as $k=>$v) {
+                $expected = $v;
+                $actual = $result[$index][$k];
 
-                if ($k!=='lastmodified') {
-                    $this->assertEquals($v, $result[$index][$k]);
-                } else {
-                    $this->assertTrue(isset($result[$index][$k]));
+                switch ($k) {
+                    case 'lastmodified' :
+                        $this->assertInternalType('int', $actual);
+                        break;
+                    case 'carddata' :
+                        if (is_resource($actual)) {
+                            $actual = stream_get_contents($actual);
+                        }
+                        // No break intended.
+                    default :
+                        $this->assertEquals($expected, $actual);
+                        break;
                 }
 
             }
@@ -287,13 +308,16 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
     /**
      * @depends testGetCard
      */
-    public function testUpdateCard() {
+    function testUpdateCard() {
 
         $result = $this->backend->updateCard(1, 'card1', 'newdata');
         $this->assertEquals('"' . md5('newdata') . '"', $result);
 
-        $result = $this->backend->getCard(1,'card1');
+        $result = $this->backend->getCard(1, 'card1');
         $this->assertEquals(1, $result['id']);
+        if (is_resource($result['carddata'])) {
+            $result['carddata'] = stream_get_contents($result['carddata']);
+        }
         $this->assertEquals('newdata', $result['carddata']);
 
     }
@@ -301,10 +325,10 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
     /**
      * @depends testGetCard
      */
-    public function testDeleteCard() {
+    function testDeleteCard() {
 
         $this->backend->deleteCard(1, 'card1');
-        $result = $this->backend->getCard(1,'card1');
+        $result = $this->backend->getCard(1, 'card1');
         $this->assertFalse($result);
 
     }
@@ -347,4 +371,3 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
     }
 }
-
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/Mock.php b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/Mock.php
index 3f96d3c5d..840b898e8 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/Mock.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/Mock.php
@@ -13,24 +13,24 @@ class Mock extends AbstractBackend {
         $this->cards = $cards;
 
         if (is_null($this->addressBooks)) {
-            $this->addressBooks = array(
-                array(
-                    'id' => 'foo',
-                    'uri' => 'book1',
-                    'principaluri' => 'principals/user1',
+            $this->addressBooks = [
+                [
+                    'id'                => 'foo',
+                    'uri'               => 'book1',
+                    'principaluri'      => 'principals/user1',
                     '{DAV:}displayname' => 'd-name',
-                ),
-            );
+                ],
+            ];
 
-            $card2 = fopen('php://memory','r+');
-            fwrite($card2,"BEGIN:VCARD\nVERSION:3.0\nUID:45678\nEND:VCARD");
+            $card2 = fopen('php://memory', 'r+');
+            fwrite($card2, "BEGIN:VCARD\nVERSION:3.0\nUID:45678\nEND:VCARD");
             rewind($card2);
-            $this->cards = array(
-                'foo' => array(
+            $this->cards = [
+                'foo' => [
                     'card1' => "BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD",
                     'card2' => $card2,
-                ),
-            );
+                ],
+            ];
         }
 
     }
@@ -38,8 +38,8 @@ class Mock extends AbstractBackend {
 
     function getAddressBooksForUser($principalUri) {
 
-        $books = array();
-        foreach($this->addressBooks as $book) {
+        $books = [];
+        foreach ($this->addressBooks as $book) {
             if ($book['principaluri'] === $principalUri) {
                 $books[] = $book;
             }
@@ -64,14 +64,14 @@ class Mock extends AbstractBackend {
      * @param \Sabre\DAV\PropPatch $propPatch
      * @return void
      */
-    public function updateAddressBook($addressBookId, \Sabre\DAV\PropPatch $propPatch) {
+    function updateAddressBook($addressBookId, \Sabre\DAV\PropPatch $propPatch) {
 
-        foreach($this->addressBooks as &$book) {
+        foreach ($this->addressBooks as &$book) {
             if ($book['id'] !== $addressBookId)
                 continue;
 
             $propPatch->handleRemaining(function($mutations) use (&$book) {
-                foreach($mutations as $key=>$value) {
+                foreach ($mutations as $key => $value) {
                     $book[$key] = $value;
                 }
                 return true;
@@ -83,17 +83,17 @@ class Mock extends AbstractBackend {
 
     function createAddressBook($principalUri, $url, array $properties) {
 
-        $this->addressBooks[] = array_merge($properties, array(
-            'id' => $url,
-            'uri' => $url,
+        $this->addressBooks[] = array_merge($properties, [
+            'id'           => $url,
+            'uri'          => $url,
             'principaluri' => $principalUri,
-        ));
+        ]);
 
     }
 
     function deleteAddressBook($addressBookId) {
 
-        foreach($this->addressBooks as $key=>$value) {
+        foreach ($this->addressBooks as $key => $value) {
             if ($value['id'] === $addressBookId)
                 unset($this->addressBooks[$key]);
         }
@@ -101,41 +101,142 @@ class Mock extends AbstractBackend {
 
     }
 
+    /**
+     * Returns all cards for a specific addressbook id.
+     *
+     * This method should return the following properties for each card:
+     *   * carddata - raw vcard data
+     *   * uri - Some unique url
+     *   * lastmodified - A unix timestamp
+     *
+     * It's recommended to also return the following properties:
+     *   * etag - A unique etag. This must change every time the card changes.
+     *   * size - The size of the card in bytes.
+     *
+     * If these last two properties are provided, less time will be spent
+     * calculating them. If they are specified, you can also ommit carddata.
+     * This may speed up certain requests, especially with large cards.
+     *
+     * @param mixed $addressbookId
+     * @return array
+     */
     function getCards($addressBookId) {
 
-        $cards = array();
-        foreach($this->cards[$addressBookId] as $uri=>$data) {
-            $cards[] = array(
-                'uri' => $uri,
-                'carddata' => $data,
-            );
+        $cards = [];
+        foreach ($this->cards[$addressBookId] as $uri => $data) {
+            if (is_resource($data)) {
+                $cards[] = [
+                    'uri'      => $uri,
+                    'carddata' => $data,
+                ];
+            } else {
+                $cards[] = [
+                    'uri'      => $uri,
+                    'carddata' => $data,
+                    'etag'     => '"' . md5($data) . '"',
+                    'size'     => strlen($data)
+                ];
+            }
         }
         return $cards;
 
     }
 
+    /**
+     * Returns a specfic card.
+     *
+     * The same set of properties must be returned as with getCards. The only
+     * exception is that 'carddata' is absolutely required.
+     *
+     * If the card does not exist, you must return false.
+     *
+     * @param mixed $addressBookId
+     * @param string $cardUri
+     * @return array
+     */
     function getCard($addressBookId, $cardUri) {
 
         if (!isset($this->cards[$addressBookId][$cardUri])) {
             return false;
         }
 
-        return array(
-            'uri' => $cardUri,
-            'carddata' => $this->cards[$addressBookId][$cardUri],
-        );
+        $data = $this->cards[$addressBookId][$cardUri];
+        return [
+            'uri'      => $cardUri,
+            'carddata' => $data,
+            'etag'     => '"' . md5($data) . '"',
+            'size'     => strlen($data)
+        ];
 
     }
 
+    /**
+     * Creates a new card.
+     *
+     * The addressbook id will be passed as the first argument. This is the
+     * same id as it is returned from the getAddressBooksForUser method.
+     *
+     * The cardUri is a base uri, and doesn't include the full path. The
+     * cardData argument is the vcard body, and is passed as a string.
+     *
+     * It is possible to return an ETag from this method. This ETag is for the
+     * newly created resource, and must be enclosed with double quotes (that
+     * is, the string itself must contain the double quotes).
+     *
+     * You should only return the ETag if you store the carddata as-is. If a
+     * subsequent GET request on the same card does not have the same body,
+     * byte-by-byte and you did return an ETag here, clients tend to get
+     * confused.
+     *
+     * If you don't return an ETag, you can just return null.
+     *
+     * @param mixed $addressBookId
+     * @param string $cardUri
+     * @param string $cardData
+     * @return string|null
+     */
     function createCard($addressBookId, $cardUri, $cardData) {
 
+        if (is_resource($cardData)) {
+            $cardData = stream_get_contents($cardData);
+        }
         $this->cards[$addressBookId][$cardUri] = $cardData;
+        return '"' . md5($cardData) . '"';
 
     }
 
+    /**
+     * Updates a card.
+     *
+     * The addressbook id will be passed as the first argument. This is the
+     * same id as it is returned from the getAddressBooksForUser method.
+     *
+     * The cardUri is a base uri, and doesn't include the full path. The
+     * cardData argument is the vcard body, and is passed as a string.
+     *
+     * It is possible to return an ETag from this method. This ETag should
+     * match that of the updated resource, and must be enclosed with double
+     * quotes (that is: the string itself must contain the actual quotes).
+     *
+     * You should only return the ETag if you store the carddata as-is. If a
+     * subsequent GET request on the same card does not have the same body,
+     * byte-by-byte and you did return an ETag here, clients tend to get
+     * confused.
+     *
+     * If you don't return an ETag, you can just return null.
+     *
+     * @param mixed $addressBookId
+     * @param string $cardUri
+     * @param string $cardData
+     * @return string|null
+     */
     function updateCard($addressBookId, $cardUri, $cardData) {
 
+        if (is_resource($cardData)) {
+            $cardData = stream_get_contents($cardData);
+        }
         $this->cards[$addressBookId][$cardUri] = $cardData;
+        return '"' . md5($cardData) . '"';
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOMySQLTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOMySQLTest.php
index 38cb655d0..c1b0e274e 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOMySQLTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOMySQLTest.php
@@ -2,35 +2,8 @@
 
 namespace Sabre\CardDAV\Backend;
 
-require_once 'Sabre/TestUtil.php';
-
 class PDOMySQLTest extends AbstractPDOTest {
 
-    /**
-     * @return PDO
-     */
-    public function getPDO() {
-
-        if (!SABRE_HASMYSQL) $this->markTestSkipped('MySQL driver is not available, or not properly configured');
-
-        $pdo = \Sabre\TestUtil::getMySQLDB();
-        if (!$pdo) $this->markTestSkipped('Could not connect to MySQL database');
-
-        $pdo->query("DROP TABLE IF EXISTS addressbooks, cards, addressbookchanges");
-
-        $queries = explode(
-            ';',
-            file_get_contents(__DIR__ . '/../../../../examples/sql/mysql.addressbook.sql')
-        );
-
-        foreach($queries as $query) {
-            $query = trim($query," \r\n\t");
-            if ($query)
-                $pdo->exec($query);
-        }
-        return $pdo;
-
-    }
+    public $driver = 'mysql';
 
 }
-
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOSqliteTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOSqliteTest.php
index 5a4a7a327..b187c4d78 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOSqliteTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/Backend/PDOSqliteTest.php
@@ -2,53 +2,8 @@
 
 namespace Sabre\CardDAV\Backend;
 
-require_once 'Sabre/TestUtil.php';
-
 class PDOSqliteTest extends AbstractPDOTest {
 
-    function tearDown() {
-
-        if (file_exists(SABRE_TEMPDIR . '/pdobackend')) unlink(SABRE_TEMPDIR . '/pdobackend');
-        if (file_exists(SABRE_TEMPDIR . '/pdobackend2')) unlink(SABRE_TEMPDIR . '/pdobackend2');
-
-    }
-
-    /**
-     * @return PDO
-     */
-    function getPDO() {
-
-        return self::getSQLite();
-
-    }
-
-    /**
-     * @return PDO
-     */
-    static function getSQLite() {
-
-        if (!SABRE_HASSQLITE) $this->markTestSkipped('SQLite driver is not available');
-        $pdo = new \PDO('sqlite:'.SABRE_TEMPDIR.'/pdobackend');
-        $pdo->setAttribute(\PDO::ATTR_ERRMODE,\PDO::ERRMODE_EXCEPTION);
-
-        $pdo->query("DROP TABLE IF EXISTS addressbooks");
-        $pdo->query("DROP TABLE IF EXISTS addressbookchanges");
-        $pdo->query("DROP TABLE IF EXISTS cards");
-
-        $queries = explode(
-            ';',
-            file_get_contents(__DIR__ . '/../../../../examples/sql/sqlite.addressbooks.sql')
-        );
-
-        foreach($queries as $query) {
-            $query = trim($query," \r\n\t");
-            if ($query)
-                $pdo->exec($query);
-        }
-
-        return $pdo;
-
-    }
+    public $driver = 'sqlite';
 
 }
-
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/CardTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/CardTest.php
index cf8dbab0c..cb7d152c3 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/CardTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/CardTest.php
@@ -18,16 +18,16 @@ class CardTest extends \PHPUnit_Framework_TestCase {
         $this->backend = new Backend\Mock();
         $this->card = new Card(
             $this->backend,
-            array(
-                'uri' => 'book1',
-                'id' => 'foo',
+            [
+                'uri'          => 'book1',
+                'id'           => 'foo',
                 'principaluri' => 'principals/user1',
-            ),
-            array(
-                'uri' => 'card1',
+            ],
+            [
+                'uri'           => 'card1',
                 'addressbookid' => 'foo',
-                'carddata' => 'card',
-            )
+                'carddata'      => 'card',
+            ]
         );
 
     }
@@ -42,15 +42,15 @@ class CardTest extends \PHPUnit_Framework_TestCase {
 
         $this->card = new Card(
             $this->backend,
-            array(
-                'uri' => 'book1',
-                'id' => 'foo',
+            [
+                'uri'          => 'book1',
+                'id'           => 'foo',
                 'principaluri' => 'principals/user1',
-            ),
-            array(
-                'uri' => 'card1',
+            ],
+            [
+                'uri'           => 'card1',
                 'addressbookid' => 'foo',
-            )
+            ]
         );
         $result = $this->card->get();
         $this->assertEquals("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD", $result);
@@ -63,7 +63,7 @@ class CardTest extends \PHPUnit_Framework_TestCase {
      */
     function testPut() {
 
-        $file = fopen('php://memory','r+');
+        $file = fopen('php://memory', 'r+');
         fwrite($file, 'newdata');
         rewind($file);
         $this->card->put($file);
@@ -88,7 +88,7 @@ class CardTest extends \PHPUnit_Framework_TestCase {
 
     function testGetETag() {
 
-        $this->assertEquals('"' . md5('card') . '"' , $this->card->getETag());
+        $this->assertEquals('"' . md5('card') . '"', $this->card->getETag());
 
     }
 
@@ -96,19 +96,19 @@ class CardTest extends \PHPUnit_Framework_TestCase {
 
         $card = new Card(
             $this->backend,
-            array(
-                'uri' => 'book1',
-                'id' => 'foo',
+            [
+                'uri'          => 'book1',
+                'id'           => 'foo',
                 'principaluri' => 'principals/user1',
-            ),
-            array(
-                'uri' => 'card1',
+            ],
+            [
+                'uri'           => 'card1',
                 'addressbookid' => 'foo',
-                'carddata' => 'card',
-                'etag' => '"blabla"',
-            )
+                'carddata'      => 'card',
+                'etag'          => '"blabla"',
+            ]
         );
-        $this->assertEquals('"blabla"' , $card->getETag());
+        $this->assertEquals('"blabla"', $card->getETag());
 
     }
 
@@ -129,17 +129,17 @@ class CardTest extends \PHPUnit_Framework_TestCase {
 
         $card = new Card(
             $this->backend,
-            array(
-                'uri' => 'book1',
-                'id' => 'foo',
+            [
+                'uri'          => 'book1',
+                'id'           => 'foo',
                 'principaluri' => 'principals/user1',
-            ),
-            array(
-                'uri' => 'card1',
+            ],
+            [
+                'uri'           => 'card1',
                 'addressbookid' => 'foo',
-                'etag' => '"blabla"',
-                'size' => 4,
-            )
+                'etag'          => '"blabla"',
+                'size'          => 4,
+            ]
         );
         $this->assertEquals(4, $card->getSize());
 
@@ -149,58 +149,53 @@ class CardTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertEquals('principals/user1', $this->card->getOwner());
         $this->assertNull($this->card->getGroup());
-        $this->assertEquals(array(
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => 'principals/user1',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
+        $this->assertEquals([
+            [
+                'privilege' => '{DAV:}all',
                 'principal' => 'principals/user1',
                 'protected' => true,
-            ),
-        ), $this->card->getACL());
+            ],
+        ], $this->card->getACL());
 
     }
     function testOverrideACL() {
 
         $card = new Card(
             $this->backend,
-            array(
-                'uri' => 'book1',
-                'id' => 'foo',
+            [
+                'uri'          => 'book1',
+                'id'           => 'foo',
                 'principaluri' => 'principals/user1',
-            ),
-            array(
-                'uri' => 'card1',
+            ],
+            [
+                'uri'           => 'card1',
                 'addressbookid' => 'foo',
-                'carddata' => 'card',
-                'acl' => array(
-                    array(
+                'carddata'      => 'card',
+                'acl'           => [
+                    [
                         'privilege' => '{DAV:}read',
                         'principal' => 'principals/user1',
                         'protected' => true,
-                    ),
-                ),
-            )
+                    ],
+                ],
+            ]
         );
-        $this->assertEquals(array(
-            array(
+        $this->assertEquals([
+            [
                 'privilege' => '{DAV:}read',
                 'principal' => 'principals/user1',
                 'protected' => true,
-            ),
-        ), $card->getACL());
+            ],
+        ], $card->getACL());
 
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\MethodNotAllowed
+     * @expectedException Sabre\DAV\Exception\Forbidden
      */
     function testSetACL() {
 
-       $this->card->setACL(array());
+       $this->card->setACL([]);
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/IDirectoryTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/IDirectoryTest.php
index 431cd2524..4796a131f 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/IDirectoryTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/IDirectoryTest.php
@@ -8,15 +8,15 @@ class IDirectoryTest extends \PHPUnit_Framework_TestCase {
 
     function testResourceType() {
 
-        $tree = array(
+        $tree = [
             new DirectoryMock('directory')
-        );
+        ];
 
         $server = new DAV\Server($tree);
         $plugin = new Plugin();
         $server->addPlugin($plugin);
 
-        $props = $server->getProperties('directory', array('{DAV:}resourcetype'));
+        $props = $server->getProperties('directory', ['{DAV:}resourcetype']);
         $this->assertTrue($props['{DAV:}resourcetype']->is('{' . Plugin::NS_CARDDAV . '}directory'));
 
     }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/MultiGetTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/MultiGetTest.php
index b0ee45880..d79239d0f 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/MultiGetTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/MultiGetTest.php
@@ -11,10 +11,10 @@ class MultiGetTest extends AbstractPluginTest {
 
     function testMultiGet() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'REPORT',
-            'REQUEST_URI' => '/addressbooks/user1/book1',
-        ));
+            'REQUEST_URI'    => '/addressbooks/user1/book1',
+        ]);
 
         $request->setBody(
 '<?xml version="1.0"?>
@@ -37,27 +37,27 @@ class MultiGetTest extends AbstractPluginTest {
         $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
 
         // using the client for parsing
-        $client = new DAV\Client(array('baseUri'=>'/'));
+        $client = new DAV\Client(['baseUri' => '/']);
 
         $result = $client->parseMultiStatus($response->body);
 
-        $this->assertEquals(array(
-            '/addressbooks/user1/book1/card1' => array(
-                200 => array(
-                    '{DAV:}getetag' => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
-                    '{urn:ietf:params:xml:ns:carddav}address-data' => "BEGIN:VCARD\r\nVERSION:3.0\r\nUID:12345\r\nEND:VCARD\r\n",
-                )
-            )
-        ), $result);
+        $this->assertEquals([
+            '/addressbooks/user1/book1/card1' => [
+                200 => [
+                    '{DAV:}getetag'                                => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
+                    '{urn:ietf:params:xml:ns:carddav}address-data' => "BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD",
+                ]
+            ]
+        ], $result);
 
     }
 
     function testMultiGetVCard4() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'REPORT',
-            'REQUEST_URI' => '/addressbooks/user1/book1',
-        ));
+            'REQUEST_URI'    => '/addressbooks/user1/book1',
+        ]);
 
         $request->setBody(
 '<?xml version="1.0"?>
@@ -80,20 +80,20 @@ class MultiGetTest extends AbstractPluginTest {
         $this->assertEquals(207, $response->status, 'Incorrect status code. Full response body:' . $response->body);
 
         // using the client for parsing
-        $client = new DAV\Client(array('baseUri'=>'/'));
+        $client = new DAV\Client(['baseUri' => '/']);
 
         $result = $client->parseMultiStatus($response->body);
 
         $prodId = "PRODID:-//Sabre//Sabre VObject " . \Sabre\VObject\Version::VERSION . "//EN";
 
-        $this->assertEquals(array(
-            '/addressbooks/user1/book1/card1' => array(
-                200 => array(
-                    '{DAV:}getetag' => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
+        $this->assertEquals([
+            '/addressbooks/user1/book1/card1' => [
+                200 => [
+                    '{DAV:}getetag'                                => '"' . md5("BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD") . '"',
                     '{urn:ietf:params:xml:ns:carddav}address-data' => "BEGIN:VCARD\r\nVERSION:4.0\r\n$prodId\r\nUID:12345\r\nEND:VCARD\r\n",
-                )
-            )
-        ), $result);
+                ]
+            ]
+        ], $result);
 
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/PluginTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/PluginTest.php
index 9c916350e..6962e7830 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/PluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/PluginTest.php
@@ -3,7 +3,6 @@
 namespace Sabre\CardDAV;
 
 use Sabre\DAV;
-use Sabre\DAV\Xml\Property\Href;
 
 class PluginTest extends AbstractPluginTest {
 
@@ -18,23 +17,23 @@ class PluginTest extends AbstractPluginTest {
 
     function testSupportedReportSet() {
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             '{' . Plugin::NS_CARDDAV . '}addressbook-multiget',
             '{' . Plugin::NS_CARDDAV . '}addressbook-query',
-        ), $this->plugin->getSupportedReportSet('addressbooks/user1/book1'));
+        ], $this->plugin->getSupportedReportSet('addressbooks/user1/book1'));
 
     }
 
     function testSupportedReportSetEmpty() {
 
-        $this->assertEquals(array(
-        ), $this->plugin->getSupportedReportSet(''));
+        $this->assertEquals([
+        ], $this->plugin->getSupportedReportSet(''));
 
     }
 
     function testAddressBookHomeSet() {
 
-        $result = $this->server->getProperties('principals/user1', array('{' . Plugin::NS_CARDDAV . '}addressbook-home-set'));
+        $result = $this->server->getProperties('principals/user1', ['{' . Plugin::NS_CARDDAV . '}addressbook-home-set']);
 
         $this->assertEquals(1, count($result));
         $this->assertTrue(isset($result['{' . Plugin::NS_CARDDAV . '}addressbook-home-set']));
@@ -44,11 +43,11 @@ class PluginTest extends AbstractPluginTest {
 
     function testDirectoryGateway() {
 
-        $result = $this->server->getProperties('principals/user1', array('{' . Plugin::NS_CARDDAV . '}directory-gateway'));
+        $result = $this->server->getProperties('principals/user1', ['{' . Plugin::NS_CARDDAV . '}directory-gateway']);
 
         $this->assertEquals(1, count($result));
         $this->assertTrue(isset($result['{' . Plugin::NS_CARDDAV . '}directory-gateway']));
-        $this->assertEquals(array('directory'), $result['{' . Plugin::NS_CARDDAV . '}directory-gateway']->getHrefs());
+        $this->assertEquals(['directory'], $result['{' . Plugin::NS_CARDDAV . '}directory-gateway']->getHrefs());
 
     }
 
@@ -64,7 +63,7 @@ class PluginTest extends AbstractPluginTest {
         $r = $this->server->emit('onHTMLActionsPanel', [$this->server->tree->getNodeForPath('addressbooks/user1'), &$output]);
         $this->assertFalse($r);
 
-        $this->assertTrue(!!strpos($output,'Display name'));
+        $this->assertTrue(!!strpos($output, 'Display name'));
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/SogoStripContentTypeTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/SogoStripContentTypeTest.php
index f828cc25b..0ba4fd669 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/SogoStripContentTypeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/SogoStripContentTypeTest.php
@@ -5,44 +5,44 @@ namespace Sabre\CardDAV;
 use Sabre\HTTP;
 use Sabre\DAV\PropFind;
 
-class SogoStripContentType extends \Sabre\DAVServerTest {
+class SogoStripContentTypeTest extends \Sabre\DAVServerTest {
 
     protected $setupCardDAV = true;
-    protected $carddavAddressBooks = array(
-        array(
-            'id'  => 1,
-            'uri' => 'book1',
+    protected $carddavAddressBooks = [
+        [
+            'id'           => 1,
+            'uri'          => 'book1',
             'principaluri' => 'principals/user1',
-        ),
-    );
-    protected $carddavCards = array(
-        1 => array(
+        ],
+    ];
+    protected $carddavCards = [
+        1 => [
             'card1.vcf' => "BEGIN:VCARD\nVERSION:3.0\nUID:12345\nEND:VCARD",
-        ),
-    );
+        ],
+    ];
 
     function testDontStrip() {
 
-        $result = $this->server->getProperties('addressbooks/user1/book1/card1.vcf',array('{DAV:}getcontenttype'));
-        $this->assertEquals(array(
+        $result = $this->server->getProperties('addressbooks/user1/book1/card1.vcf', ['{DAV:}getcontenttype']);
+        $this->assertEquals([
             '{DAV:}getcontenttype' => 'text/vcard; charset=utf-8'
-        ), $result);
+        ], $result);
 
     }
     function testStrip() {
 
-        $this->server->httpRequest = HTTP\Sapi::createFromServerArray(array(
+        $this->server->httpRequest = HTTP\Sapi::createFromServerArray([
             'HTTP_USER_AGENT' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 Lightning/1.2.1',
-        ));
-        $result = $this->server->getProperties('addressbooks/user1/book1/card1.vcf',array('{DAV:}getcontenttype'));
-        $this->assertEquals(array(
+        ]);
+        $result = $this->server->getProperties('addressbooks/user1/book1/card1.vcf', ['{DAV:}getcontenttype']);
+        $this->assertEquals([
             '{DAV:}getcontenttype' => 'text/x-vcard'
-        ), $result);
+        ], $result);
 
     }
     function testDontTouchOtherMimeTypes() {
 
-        $this->server->httpRequest = new HTTP\Request('GET','/addressbooks/user1/book1/card1.vcf', [
+        $this->server->httpRequest = new HTTP\Request('GET', '/addressbooks/user1/book1/card1.vcf', [
             'User-Agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 Lightning/1.2.1',
         ]);
 
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/TestUtil.php b/vendor/sabre/dav/tests/Sabre/CardDAV/TestUtil.php
index c9cc10d35..ec8a3501e 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/TestUtil.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/TestUtil.php
@@ -2,8 +2,6 @@
 
 namespace Sabre\CardDAV;
 
-use PDO;
-
 class TestUtil {
 
     static function getBackend() {
@@ -22,18 +20,18 @@ class TestUtil {
         $addressbookId = $backend->createAddressBook(
             'principals/user1',
             'UUID-123467',
-            array(
-                '{DAV:}displayname' => 'user1 addressbook',
+            [
+                '{DAV:}displayname'                                       => 'user1 addressbook',
                 '{urn:ietf:params:xml:ns:carddav}addressbook-description' => 'AddressBook description',
-            )
+            ]
         );
         $backend->createAddressBook(
             'principals/user1',
             'UUID-123468',
-            array(
-                '{DAV:}displayname' => 'user1 addressbook2',
+            [
+                '{DAV:}displayname'                                       => 'user1 addressbook2',
                 '{urn:ietf:params:xml:ns:carddav}addressbook-description' => 'AddressBook description',
-            )
+            ]
         );
         $backend->createCard($addressbookId, 'UUID-2345', self::getTestCardData());
         return $pdo;
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/VCFExportTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/VCFExportTest.php
index 71fde719d..82d82fadd 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/VCFExportTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/VCFExportTest.php
@@ -10,21 +10,21 @@ class VCFExportTest extends \Sabre\DAVServerTest {
     protected $autoLogin = 'user1';
     protected $setupACL = true;
 
-    protected $carddavAddressBooks = array(
-        array(
-            'id' => 'book1',
-            'uri' => 'book1',
+    protected $carddavAddressBooks = [
+        [
+            'id'           => 'book1',
+            'uri'          => 'book1',
             'principaluri' => 'principals/user1',
-        )
-    );
-    protected $carddavCards = array(
-        'book1' => array(
+        ]
+    ];
+    protected $carddavCards = [
+        'book1' => [
             "card1" => "BEGIN:VCARD\r\nFN:Person1\r\nEND:VCARD\r\n",
             "card2" => "BEGIN:VCARD\r\nFN:Person2\r\nEND:VCARD",
             "card3" => "BEGIN:VCARD\r\nFN:Person3\r\nEND:VCARD\r\n",
             "card4" => "BEGIN:VCARD\nFN:Person4\nEND:VCARD\n",
-        )
-    );
+        ]
+    ];
 
     function setUp() {
 
@@ -50,11 +50,11 @@ class VCFExportTest extends \Sabre\DAVServerTest {
 
     function testExport() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_URI' => '/addressbooks/user1/book1?export',
-            'QUERY_STRING' => 'export',
+        $request = HTTP\Sapi::createFromServerArray([
+            'REQUEST_URI'    => '/addressbooks/user1/book1?export',
+            'QUERY_STRING'   => 'export',
             'REQUEST_METHOD' => 'GET',
-        ));
+        ]);
 
         $response = $this->request($request);
         $this->assertEquals(200, $response->status, $response->body);
@@ -73,7 +73,7 @@ FN:Person4
 END:VCARD
 ";
         // We actually expected windows line endings
-        $expected = str_replace("\n","\r\n", $expected);
+        $expected = str_replace("\n", "\r\n", $expected);
 
         $this->assertEquals($expected, $response->body);
 
@@ -89,4 +89,47 @@ END:VCARD
 
     }
 
+    function testContentDisposition() {
+
+        $request = new HTTP\Request(
+            'GET',
+            '/addressbooks/user1/book1?export'
+        );
+
+        $response = $this->request($request, 200);
+        $this->assertEquals('text/directory', $response->getHeader('Content-Type'));
+        $this->assertEquals(
+            'attachment; filename="book1-' . date('Y-m-d') . '.vcf"',
+            $response->getHeader('Content-Disposition')
+        );
+
+    }
+
+    function testContentDispositionBadChars() {
+
+        $this->carddavBackend->createAddressBook(
+            'principals/user1',
+            'book-b_ad"(ch)ars',
+            []
+        );
+        $this->carddavBackend->createCard(
+            'book-b_ad"(ch)ars',
+            'card1',
+            "BEGIN:VCARD\r\nFN:Person1\r\nEND:VCARD\r\n"
+        );
+
+        $request = new HTTP\Request(
+            'GET',
+            '/addressbooks/user1/book-b_ad"(ch)ars?export'
+        );
+
+        $response = $this->request($request, 200);
+        $this->assertEquals('text/directory', $response->getHeader('Content-Type'));
+        $this->assertEquals(
+            'attachment; filename="book-b_adchars-' . date('Y-m-d') . '.vcf"',
+            $response->getHeader('Content-Disposition')
+        );
+
+    }
+
 }
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateFilterTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateFilterTest.php
index c87716c10..57ac21b4a 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateFilterTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateFilterTest.php
@@ -48,35 +48,35 @@ HELLO;
 
         // Check if TITLE is defined
         $filter1 =
-            array('name' => 'title', 'is-not-defined' => false, 'param-filters' => array(), 'text-matches' => array());
+            ['name' => 'title', 'is-not-defined' => false, 'param-filters' => [], 'text-matches' => []];
 
         // Check if FOO is defined
         $filter2 =
-            array('name' => 'foo', 'is-not-defined' => false, 'param-filters' => array(), 'text-matches' => array());
+            ['name' => 'foo', 'is-not-defined' => false, 'param-filters' => [], 'text-matches' => []];
 
         // Check if TITLE is not defined
         $filter3 =
-            array('name' => 'title', 'is-not-defined' => true, 'param-filters' => array(), 'text-matches' => array());
+            ['name' => 'title', 'is-not-defined' => true, 'param-filters' => [], 'text-matches' => []];
 
         // Check if FOO is not defined
         $filter4 =
-            array('name' => 'foo', 'is-not-defined' => true, 'param-filters' => array(), 'text-matches' => array());
+            ['name' => 'foo', 'is-not-defined' => true, 'param-filters' => [], 'text-matches' => []];
 
         // Check if TEL[TYPE] is defined
         $filter5 =
-            array(
-                'name' => 'tel',
+            [
+                'name'           => 'tel',
                 'is-not-defined' => false,
-                'test' => 'anyof',
-                'param-filters' => array(
-                    array(
-                        'name' => 'type',
+                'test'           => 'anyof',
+                'param-filters'  => [
+                    [
+                        'name'           => 'type',
                         'is-not-defined' => false,
-                        'text-match' => null
-                    ),
-                ),
-                'text-matches' => array(),
-            );
+                        'text-match'     => null
+                    ],
+                ],
+                'text-matches' => [],
+            ];
 
         // Check if TEL[FOO] is defined
         $filter6 = $filter5;
@@ -101,20 +101,20 @@ HELLO;
 
         // Check if URL contains 'google'
         $filter11 =
-            array(
-                'name' => 'url',
+            [
+                'name'           => 'url',
                 'is-not-defined' => false,
-                'test' => 'anyof',
-                'param-filters' => array(),
-                'text-matches' => array(
-                    array(
-                        'match-type' => 'contains',
-                        'value' => 'google',
+                'test'           => 'anyof',
+                'param-filters'  => [],
+                'text-matches'   => [
+                    [
+                        'match-type'       => 'contains',
+                        'value'            => 'google',
                         'negate-condition' => false,
-                        'collation' => 'i;octet',
-                    ),
-                ),
-            );
+                        'collation'        => 'i;octet',
+                    ],
+                ],
+            ];
 
         // Check if URL contains 'bing'
         $filter12 = $filter11;
@@ -131,12 +131,12 @@ HELLO;
 
         // Param filter with text
         $filter15 = $filter5;
-        $filter15['param-filters'][0]['text-match'] = array(
-            'match-type' => 'contains',
-            'value' => 'WORK',
-            'collation' => 'i;octet',
+        $filter15['param-filters'][0]['text-match'] = [
+            'match-type'       => 'contains',
+            'value'            => 'WORK',
+            'collation'        => 'i;octet',
             'negate-condition' => false,
-        );
+        ];
         $filter16 = $filter15;
         $filter16['param-filters'][0]['text-match']['negate-condition'] = true;
 
@@ -144,60 +144,60 @@ HELLO;
         // Param filter + text filter
         $filter17 = $filter5;
         $filter17['test'] = 'anyof';
-        $filter17['text-matches'][] = array(
-            'match-type' => 'contains',
-            'value' => '444',
-            'collation' => 'i;octet',
+        $filter17['text-matches'][] = [
+            'match-type'       => 'contains',
+            'value'            => '444',
+            'collation'        => 'i;octet',
             'negate-condition' => false,
-        );
+        ];
 
         $filter18 = $filter17;
         $filter18['text-matches'][0]['negate-condition'] = true;
 
         $filter18['test'] = 'allof';
 
-        return array(
+        return [
 
             // Basic filters
-            array($body1, array($filter1), 'anyof',true),
-            array($body1, array($filter2), 'anyof',false),
-            array($body1, array($filter3), 'anyof',false),
-            array($body1, array($filter4), 'anyof',true),
+            [$body1, [$filter1], 'anyof',true],
+            [$body1, [$filter2], 'anyof',false],
+            [$body1, [$filter3], 'anyof',false],
+            [$body1, [$filter4], 'anyof',true],
 
             // Combinations
-            array($body1, array($filter1, $filter2), 'anyof',true),
-            array($body1, array($filter1, $filter2), 'allof',false),
-            array($body1, array($filter1, $filter4), 'anyof',true),
-            array($body1, array($filter1, $filter4), 'allof',true),
-            array($body1, array($filter2, $filter3), 'anyof',false),
-            array($body1, array($filter2, $filter3), 'allof',false),
+            [$body1, [$filter1, $filter2], 'anyof',true],
+            [$body1, [$filter1, $filter2], 'allof',false],
+            [$body1, [$filter1, $filter4], 'anyof',true],
+            [$body1, [$filter1, $filter4], 'allof',true],
+            [$body1, [$filter2, $filter3], 'anyof',false],
+            [$body1, [$filter2, $filter3], 'allof',false],
 
             // Basic parameters
-            array($body1, array($filter5), 'anyof', true, 'TEL;TYPE is defined, so this should return true'),
-            array($body1, array($filter6), 'anyof', false, 'TEL;FOO is not defined, so this should return false'),
+            [$body1, [$filter5], 'anyof', true, 'TEL;TYPE is defined, so this should return true'],
+            [$body1, [$filter6], 'anyof', false, 'TEL;FOO is not defined, so this should return false'],
 
-            array($body1, array($filter7), 'anyof', false, 'TEL;TYPE is defined, so this should return false'),
-            array($body1, array($filter8), 'anyof', true, 'TEL;TYPE is not defined, so this should return true'),
+            [$body1, [$filter7], 'anyof', false, 'TEL;TYPE is defined, so this should return false'],
+            [$body1, [$filter8], 'anyof', true, 'TEL;TYPE is not defined, so this should return true'],
 
             // Combined parameters
-            array($body1, array($filter9), 'anyof', true),
-            array($body1, array($filter10), 'anyof', false),
+            [$body1, [$filter9], 'anyof', true],
+            [$body1, [$filter10], 'anyof', false],
 
             // Text-filters
-            array($body1, array($filter11), 'anyof', true),
-            array($body1, array($filter12), 'anyof', false),
-            array($body1, array($filter13), 'anyof', false),
-            array($body1, array($filter14), 'anyof', true),
+            [$body1, [$filter11], 'anyof', true],
+            [$body1, [$filter12], 'anyof', false],
+            [$body1, [$filter13], 'anyof', false],
+            [$body1, [$filter14], 'anyof', true],
 
             // Param filter with text-match
-            array($body1, array($filter15), 'anyof', true),
-            array($body1, array($filter16), 'anyof', false),
+            [$body1, [$filter15], 'anyof', true],
+            [$body1, [$filter16], 'anyof', false],
 
             // Param filter + text filter
-            array($body1, array($filter17), 'anyof', true),
-            array($body1, array($filter18), 'anyof', false),
-            array($body1, array($filter18), 'anyof', false),
-        );
+            [$body1, [$filter17], 'anyof', true],
+            [$body1, [$filter18], 'anyof', false],
+            [$body1, [$filter18], 'anyof', false],
+        ];
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateVCardTest.php b/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateVCardTest.php
index ad8495c13..dda8a0c37 100644
--- a/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateVCardTest.php
+++ b/vendor/sabre/dav/tests/Sabre/CardDAV/ValidateVCardTest.php
@@ -15,20 +15,20 @@ class ValidateVCardTest extends \PHPUnit_Framework_TestCase {
 
     function setUp() {
 
-        $addressbooks = array(
-            array(
-                'id' => 'addressbook1',
+        $addressbooks = [
+            [
+                'id'           => 'addressbook1',
                 'principaluri' => 'principals/admin',
-                'uri' => 'addressbook1',
-            )
-        );
+                'uri'          => 'addressbook1',
+            ]
+        ];
 
-        $this->cardBackend = new Backend\Mock($addressbooks,array());
+        $this->cardBackend = new Backend\Mock($addressbooks, []);
         $principalBackend = new DAVACL\PrincipalBackend\Mock();
 
-        $tree = array(
+        $tree = [
             new AddressBookRoot($principalBackend, $this->cardBackend),
-        );
+        ];
 
         $this->server = new DAV\Server($tree);
         $this->server->sapi = new HTTP\SapiMock();
@@ -42,21 +42,36 @@ class ValidateVCardTest extends \PHPUnit_Framework_TestCase {
 
     }
 
-    function request(HTTP\Request $request) {
+    function request(HTTP\Request $request, $expectedStatus = null) {
 
         $this->server->httpRequest = $request;
         $this->server->exec();
 
+        if ($expectedStatus) {
+
+            $realStatus = $this->server->httpResponse->getStatus();
+
+            $msg = '';
+            if ($realStatus !== $expectedStatus) {
+                $msg = 'Response body: ' . $this->server->httpResponse->getBodyAsString();
+            }
+            $this->assertEquals(
+                $expectedStatus,
+                $realStatus,
+                $msg
+            );
+        }
+
         return $this->server->httpResponse;
 
     }
 
     function testCreateFile() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/addressbooks/admin/addressbook1/blabla.vcf',
-        ));
+            'REQUEST_URI'    => '/addressbooks/admin/addressbook1/blabla.vcf',
+        ]);
 
         $response = $this->request($request);
 
@@ -66,38 +81,159 @@ class ValidateVCardTest extends \PHPUnit_Framework_TestCase {
 
     function testCreateFileValid() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/addressbooks/admin/addressbook1/blabla.vcf',
-        ));
-        $request->setBody("BEGIN:VCARD\r\nUID:foo\r\nEND:VCARD\r\n");
-
-        $response = $this->request($request);
+        $request = new HTTP\Request(
+            'PUT',
+            '/addressbooks/admin/addressbook1/blabla.vcf'
+        );
 
-        $this->assertEquals(201, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
-        $expected = array(
-            'uri'          => 'blabla.vcf',
-            'carddata' => "BEGIN:VCARD\r\nUID:foo\r\nEND:VCARD\r\n",
+        $vcard = <<<VCF
+BEGIN:VCARD
+VERSION:4.0
+UID:foo
+FN:Firstname LastName
+N:LastName;FirstName;;;
+END:VCARD
+VCF;
+        $request->setBody($vcard);
+
+        $response = $this->request($request, 201);
+
+        // The custom Ew header should not be set
+        $this->assertNull(
+            $response->getHeader('X-Sabre-Ew-Gross')
+        );
+        // Valid, non-auto-fixed responses should contain an ETag.
+        $this->assertTrue(
+            $response->getHeader('ETag') !== null,
+            'We did not receive an etag'
         );
 
-        $this->assertEquals($expected, $this->cardBackend->getCard('addressbook1','blabla.vcf'));
+
+        $expected = [
+            'uri'      => 'blabla.vcf',
+            'carddata' => $vcard,
+            'size'     => strlen($vcard),
+            'etag'     => '"' . md5($vcard) . '"',
+        ];
+
+        $this->assertEquals($expected, $this->cardBackend->getCard('addressbook1', 'blabla.vcf'));
 
     }
 
-    function testCreateFileNoUID() {
+    /**
+     * This test creates an intentionally broken vCard that vobject is able
+     * to automatically repair.
+     *
+     * @depends testCreateFileValid
+     */
+    function testCreateVCardAutoFix() {
 
         $request = new HTTP\Request(
             'PUT',
             '/addressbooks/admin/addressbook1/blabla.vcf'
         );
-        $request->setBody("BEGIN:VCARD\r\nEND:VCARD\r\n");
 
-        $response = $this->request($request);
+        // The error in this vcard is that there's not enough semi-colons in N
+        $vcard = <<<VCF
+BEGIN:VCARD
+VERSION:4.0
+UID:foo
+FN:Firstname LastName
+N:LastName;FirstName;;
+END:VCARD
+VCF;
 
-        $this->assertEquals(201, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
+        $request->setBody($vcard);
+
+        $response = $this->request($request, 201);
+
+        // Auto-fixed vcards should NOT return an etag
+        $this->assertNull(
+            $response->getHeader('ETag')
+        );
+
+        // We should have gotten an Ew header
+        $this->assertNotNull(
+            $response->getHeader('X-Sabre-Ew-Gross')
+        );
+
+        $expectedVCard = <<<VCF
+BEGIN:VCARD\r
+VERSION:4.0\r
+UID:foo\r
+FN:Firstname LastName\r
+N:LastName;FirstName;;;\r
+END:VCARD\r
+
+VCF;
+
+        $expected = [
+            'uri'      => 'blabla.vcf',
+            'carddata' => $expectedVCard,
+            'size'     => strlen($expectedVCard),
+            'etag'     => '"' . md5($expectedVCard) . '"',
+        ];
+
+        $this->assertEquals($expected, $this->cardBackend->getCard('addressbook1', 'blabla.vcf'));
 
-        $foo = $this->cardBackend->getCard('addressbook1','blabla.vcf');
-        $this->assertTrue(strpos($foo['carddata'],'UID')!==false);
+    }
+
+    /**
+     * This test creates an intentionally broken vCard that vobject is able
+     * to automatically repair.
+     *
+     * However, we're supplying a heading asking the server to treat the
+     * request as strict, so the server should still let the request fail.
+     *
+     * @depends testCreateFileValid
+     */
+    function testCreateVCardStrictFail() {
+
+        $request = new HTTP\Request(
+            'PUT',
+            '/addressbooks/admin/addressbook1/blabla.vcf',
+            [
+                'Prefer' => 'handling=strict',
+            ]
+        );
+
+        // The error in this vcard is that there's not enough semi-colons in N
+        $vcard = <<<VCF
+BEGIN:VCARD
+VERSION:4.0
+UID:foo
+FN:Firstname LastName
+N:LastName;FirstName;;
+END:VCARD
+VCF;
+
+        $request->setBody($vcard);
+        $this->request($request, 415);
+
+    }
+
+    function testCreateFileNoUID() {
+
+        $request = new HTTP\Request(
+            'PUT',
+            '/addressbooks/admin/addressbook1/blabla.vcf'
+        );
+        $vcard = <<<VCF
+BEGIN:VCARD
+VERSION:4.0
+FN:Firstname LastName
+N:LastName;FirstName;;;
+END:VCARD
+VCF;
+        $request->setBody($vcard);
+
+        $response = $this->request($request, 201);
+
+        $foo = $this->cardBackend->getCard('addressbook1', 'blabla.vcf');
+        $this->assertTrue(
+            strpos($foo['carddata'], 'UID') !== false,
+            print_r($foo, true)
+        );
     }
 
     function testCreateFileJson() {
@@ -106,23 +242,23 @@ class ValidateVCardTest extends \PHPUnit_Framework_TestCase {
             'PUT',
             '/addressbooks/admin/addressbook1/blabla.vcf'
         );
-        $request->setBody('[ "vcard" , [ [ "UID" , {}, "text", "foo" ] ] ]');
+        $request->setBody('[ "vcard" , [ [ "VERSION", {}, "text", "4.0"], [ "UID" , {}, "text", "foo" ], [ "FN", {}, "text", "FirstName LastName"] ] ]');
 
         $response = $this->request($request);
 
         $this->assertEquals(201, $response->status, 'Incorrect status returned! Full response body: ' . $response->body);
 
-        $foo = $this->cardBackend->getCard('addressbook1','blabla.vcf');
-        $this->assertEquals("BEGIN:VCARD\r\nUID:foo\r\nEND:VCARD\r\n", $foo['carddata']);
+        $foo = $this->cardBackend->getCard('addressbook1', 'blabla.vcf');
+        $this->assertEquals("BEGIN:VCARD\r\nVERSION:4.0\r\nUID:foo\r\nFN:FirstName LastName\r\nEND:VCARD\r\n", $foo['carddata']);
 
     }
 
     function testCreateFileVCalendar() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/addressbooks/admin/addressbook1/blabla.vcf',
-        ));
+            'REQUEST_URI'    => '/addressbooks/admin/addressbook1/blabla.vcf',
+        ]);
         $request->setBody("BEGIN:VCALENDAR\r\nEND:VCALENDAR\r\n");
 
         $response = $this->request($request);
@@ -133,40 +269,37 @@ class ValidateVCardTest extends \PHPUnit_Framework_TestCase {
 
     function testUpdateFile() {
 
-        $this->cardBackend->createCard('addressbook1','blabla.vcf','foo');
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/addressbooks/admin/addressbook1/blabla.vcf',
-        ));
-
-        $response = $this->request($request);
+        $this->cardBackend->createCard('addressbook1', 'blabla.vcf', 'foo');
+        $request = new HTTP\Request(
+            'PUT',
+            '/addressbooks/admin/addressbook1/blabla.vcf'
+        );
 
-        $this->assertEquals(415, $response->status);
+        $response = $this->request($request, 415);
 
     }
 
     function testUpdateFileParsableBody() {
 
-        $this->cardBackend->createCard('addressbook1','blabla.vcf','foo');
-        $request = HTTP\Sapi::createFromServerArray(array(
-            'REQUEST_METHOD' => 'PUT',
-            'REQUEST_URI' => '/addressbooks/admin/addressbook1/blabla.vcf',
-        ));
-        $body = "BEGIN:VCARD\r\nUID:foo\r\nEND:VCARD\r\n";
-        $request->setBody($body);
+        $this->cardBackend->createCard('addressbook1', 'blabla.vcf', 'foo');
+        $request = new HTTP\Request(
+            'PUT',
+            '/addressbooks/admin/addressbook1/blabla.vcf'
+        );
 
-        $response = $this->request($request);
+        $body = "BEGIN:VCARD\r\nVERSION:4.0\r\nUID:foo\r\nFN:FirstName LastName\r\nEND:VCARD\r\n";
+        $request->setBody($body);
 
-        $this->assertEquals(204, $response->status);
+        $response = $this->request($request, 204);
 
-        $expected = array(
+        $expected = [
             'uri'          => 'blabla.vcf',
-            'carddata' => $body,
-        );
+            'carddata'     => $body,
+            'size'         => strlen($body),
+            'etag'         => '"' . md5($body) . '"',
+        ];
 
-        $this->assertEquals($expected, $this->cardBackend->getCard('addressbook1','blabla.vcf'));
+        $this->assertEquals($expected, $this->cardBackend->getCard('addressbook1', 'blabla.vcf'));
 
     }
 }
-
-?>
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/AbstractServer.php b/vendor/sabre/dav/tests/Sabre/DAV/AbstractServer.php
index b5b8d64ee..6a8d389a0 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/AbstractServer.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/AbstractServer.php
@@ -24,7 +24,7 @@ abstract class AbstractServer extends \PHPUnit_Framework_TestCase {
         $this->server->sapi = new HTTP\SapiMock();
         $this->server->httpResponse = $this->response;
         $this->server->debugExceptions = true;
-        $this->deleteTree(SABRE_TEMPDIR,false);
+        $this->deleteTree(SABRE_TEMPDIR, false);
         file_put_contents(SABRE_TEMPDIR . '/test.txt', 'Test contents');
         mkdir(SABRE_TEMPDIR . '/dir');
         file_put_contents(SABRE_TEMPDIR . '/dir/child.txt', 'Child contents');
@@ -34,7 +34,7 @@ abstract class AbstractServer extends \PHPUnit_Framework_TestCase {
 
     function tearDown() {
 
-        $this->deleteTree(SABRE_TEMPDIR,false);
+        $this->deleteTree(SABRE_TEMPDIR, false);
 
     }
 
@@ -44,12 +44,12 @@ abstract class AbstractServer extends \PHPUnit_Framework_TestCase {
 
     }
 
-    private function deleteTree($path,$deleteRoot = true) {
+    private function deleteTree($path, $deleteRoot = true) {
 
-        foreach(scandir($path) as $node) {
+        foreach (scandir($path) as $node) {
 
-            if ($node=='.' || $node=='.svn' || $node=='..') continue;
-            $myPath = $path.'/'. $node;
+            if ($node == '.' || $node == '.svn' || $node == '..') continue;
+            $myPath = $path . '/' . $node;
             if (is_file($myPath)) {
                 unlink($myPath);
             } else {
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractBasicTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractBasicTest.php
index 7d7a59898..455403aff 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractBasicTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractBasicTest.php
@@ -2,7 +2,6 @@
 
 namespace Sabre\DAV\Auth\Backend;
 
-use Sabre\DAV;
 use Sabre\HTTP;
 
 class AbstractBasicTest extends \PHPUnit_Framework_TestCase {
@@ -22,10 +21,10 @@ class AbstractBasicTest extends \PHPUnit_Framework_TestCase {
 
     function testCheckUnknownUser() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'PHP_AUTH_USER' => 'username',
-            'PHP_AUTH_PW' => 'wrongpassword',
-        ));
+            'PHP_AUTH_PW'   => 'wrongpassword',
+        ]);
         $response = new HTTP\Response();
 
         $backend = new AbstractBasicMock();
@@ -38,10 +37,10 @@ class AbstractBasicTest extends \PHPUnit_Framework_TestCase {
 
     function testCheckSuccess() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'PHP_AUTH_USER' => 'username',
-            'PHP_AUTH_PW' => 'password',
-        ));
+            'PHP_AUTH_PW'   => 'password',
+        ]);
         $response = new HTTP\Response();
 
         $backend = new AbstractBasicMock();
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractDigestTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractDigestTest.php
index 8ef416c37..14c72aaa0 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractDigestTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractDigestTest.php
@@ -2,7 +2,6 @@
 
 namespace Sabre\DAV\Auth\Backend;
 
-use Sabre\DAV;
 use Sabre\HTTP;
 
 class AbstractDigestTest extends \PHPUnit_Framework_TestCase {
@@ -87,12 +86,12 @@ class AbstractDigestTest extends \PHPUnit_Framework_TestCase {
     function testCheck() {
 
         $digestHash = md5('HELLO:12345:1:1:auth:' . md5('GET:/'));
-        $header = 'username=user, realm=myRealm, nonce=12345, uri=/, response='.$digestHash.', opaque=1, qop=auth, nc=1, cnonce=1';
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $header = 'username=user, realm=myRealm, nonce=12345, uri=/, response=' . $digestHash . ', opaque=1, qop=auth, nc=1, cnonce=1';
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD'  => 'GET',
             'PHP_AUTH_DIGEST' => $header,
             'REQUEST_URI'     => '/',
-        ));
+        ]);
 
         $response = new HTTP\Response();
 
@@ -127,10 +126,10 @@ class AbstractDigestMock extends AbstractDigest {
 
     function getDigestHash($realm, $userName) {
 
-        switch($userName) {
+        switch ($userName) {
             case 'null' : return null;
             case 'false' : return false;
-            case 'array' : return array();
+            case 'array' : return [];
             case 'user'  : return 'HELLO';
         }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractPDOTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractPDOTest.php
index d22923d51..b14e9fa2e 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractPDOTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/AbstractPDOTest.php
@@ -2,11 +2,21 @@
 
 namespace Sabre\DAV\Auth\Backend;
 
-use Sabre\DAV;
-
 abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
-    abstract function getPDO();
+    use \Sabre\DAV\DbTestHelperTrait;
+
+    function setUp() {
+
+        $this->dropTables('users');
+        $this->createSchema('users');
+
+        $this->getPDO()->query(
+            "INSERT INTO users (username,digesta1) VALUES ('user','hash')"
+
+        );
+
+    }
 
     function testConstruct() {
 
@@ -24,11 +34,11 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
 
-        $this->assertNull($backend->getDigestHash('realm','blabla'));
+        $this->assertNull($backend->getDigestHash('realm', 'blabla'));
 
         $expected = 'hash';
 
-        $this->assertEquals($expected, $backend->getDigestHash('realm','user'));
+        $this->assertEquals($expected, $backend->getDigestHash('realm', 'user'));
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/ApacheTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/ApacheTest.php
index 697b593db..29cbc2162 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/ApacheTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/ApacheTest.php
@@ -2,7 +2,6 @@
 
 namespace Sabre\DAV\Auth\Backend;
 
-use Sabre\DAV;
 use Sabre\HTTP;
 
 class ApacheTest extends \PHPUnit_Framework_TestCase {
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/FileTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/FileTest.php
index d2e5fe49b..f694f4806 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/FileTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/FileTest.php
@@ -6,7 +6,7 @@ class FileTest extends \PHPUnit_Framework_TestCase {
 
     function tearDown() {
 
-        if (file_exists(SABRE_TEMPDIR . '/filebackend')) unlink(SABRE_TEMPDIR .'/filebackend');
+        if (file_exists(SABRE_TEMPDIR . '/filebackend')) unlink(SABRE_TEMPDIR . '/filebackend');
 
     }
 
@@ -22,20 +22,19 @@ class FileTest extends \PHPUnit_Framework_TestCase {
      */
     function testLoadFileBroken() {
 
-        file_put_contents(SABRE_TEMPDIR . '/backend','user:realm:hash');
-        $file = new File();
-        $file->loadFile(SABRE_TEMPDIR .'/backend');
+        file_put_contents(SABRE_TEMPDIR . '/backend', 'user:realm:hash');
+        $file = new File(SABRE_TEMPDIR . '/backend');
 
     }
 
     function testLoadFile() {
 
-        file_put_contents(SABRE_TEMPDIR . '/backend','user:realm:' . md5('user:realm:password'));
+        file_put_contents(SABRE_TEMPDIR . '/backend', 'user:realm:' . md5('user:realm:password'));
         $file = new File();
         $file->loadFile(SABRE_TEMPDIR . '/backend');
 
-        $this->assertFalse($file->getDigestHash('realm','blabla'));
-        $this->assertEquals(md5('user:realm:password'), $file->getDigestHash('realm','user'));
+        $this->assertFalse($file->getDigestHash('realm', 'blabla'));
+        $this->assertEquals(md5('user:realm:password'), $file->getDigestHash('realm', 'user'));
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/Mock.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/Mock.php
index a782cb74d..b30b3f143 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/Mock.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/Mock.php
@@ -2,10 +2,8 @@
 
 namespace Sabre\DAV\Auth\Backend;
 
-use
-    Sabre\DAV,
-    Sabre\HTTP\RequestInterface,
-    Sabre\HTTP\ResponseInterface;
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
 
 class Mock implements BackendInterface {
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOMySQLTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOMySQLTest.php
index 8de2be667..18f59793a 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOMySQLTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOMySQLTest.php
@@ -2,32 +2,8 @@
 
 namespace Sabre\DAV\Auth\Backend;
 
-require_once 'Sabre/TestUtil.php';
-
 class PDOMySQLTest extends AbstractPDOTest {
 
-    function getPDO() {
-
-        if (!SABRE_HASMYSQL) $this->markTestSkipped('MySQL driver is not available, or not properly configured');
-        $pdo = \Sabre\TestUtil::getMySQLDB();
-        if (!$pdo) $this->markTestSkipped('Could not connect to MySQL database');
-        $pdo->query("DROP TABLE IF EXISTS users");
-        $pdo->query(<<<SQL
-create table users (
-  id integer unsigned not null primary key auto_increment,
-  username varchar(50),
-  digesta1 varchar(32),
-  email varchar(80),
-  displayname varchar(80),
-  unique(username)
-)
-SQL
-        );
-
-        $pdo->query("INSERT INTO users (username,digesta1,email,displayname) VALUES ('user','hash','user@example.org','User')");
-
-        return $pdo;
-
-    }
+    public $driver = 'mysql';
 
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOSqliteTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOSqliteTest.php
index abfb031bb..b1f382237 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOSqliteTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/Backend/PDOSqliteTest.php
@@ -2,27 +2,8 @@
 
 namespace Sabre\DAV\Auth\Backend;
 
-require_once 'Sabre/DAV/Auth/Backend/AbstractPDOTest.php';
+class PDOSqliteTest extends AbstractPDOTest {
 
-class PDOSQLiteTest extends AbstractPDOTest {
-
-    function tearDown() {
-
-        if (file_exists(SABRE_TEMPDIR . '/pdobackend')) unlink(SABRE_TEMPDIR . '/pdobackend');
-        if (file_exists(SABRE_TEMPDIR . '/pdobackend2')) unlink(SABRE_TEMPDIR . '/pdobackend2');
-
-    }
-
-    function getPDO() {
-
-        if (!SABRE_HASSQLITE) $this->markTestSkipped('SQLite driver is not available');
-        $pdo = new \PDO('sqlite:'.SABRE_TEMPDIR.'/pdobackend');
-        $pdo->setAttribute(\PDO::ATTR_ERRMODE,\PDO::ERRMODE_EXCEPTION);
-        $pdo->query('CREATE TABLE users (username TEXT, digesta1 TEXT, email VARCHAR(80), displayname VARCHAR(80))');
-        $pdo->query('INSERT INTO users VALUES ("user","hash","user@example.org","User")');
-
-        return $pdo;
-
-    }
+    public $driver = 'sqlite';
 
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Auth/PluginTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Auth/PluginTest.php
index 0ac9e0613..b566dd757 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Auth/PluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Auth/PluginTest.php
@@ -5,13 +5,11 @@ namespace Sabre\DAV\Auth;
 use Sabre\HTTP;
 use Sabre\DAV;
 
-require_once 'Sabre/HTTP/ResponseMock.php';
-
 class PluginTest extends \PHPUnit_Framework_TestCase {
 
     function testInit() {
 
-        $fakeServer = new DAV\Server( new DAV\SimpleCollection('bla'));
+        $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
         $plugin = new Plugin(new Backend\Mock());
         $this->assertTrue($plugin instanceof Plugin);
         $fakeServer->addPlugin($plugin);
@@ -25,7 +23,7 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
      */
     function testAuthenticate() {
 
-        $fakeServer = new DAV\Server( new DAV\SimpleCollection('bla'));
+        $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
         $plugin = new Plugin(new Backend\Mock());
         $fakeServer->addPlugin($plugin);
         $this->assertTrue(
@@ -40,7 +38,7 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
      */
     function testAuthenticateFail() {
 
-        $fakeServer = new DAV\Server( new DAV\SimpleCollection('bla'));
+        $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
         $backend = new Backend\Mock();
         $backend->fail = true;
 
@@ -51,11 +49,30 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
     }
 
     /**
+     * @depends testAuthenticateFail
+     */
+    function testAuthenticateFailDontAutoRequire() {
+
+        $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
+        $backend = new Backend\Mock();
+        $backend->fail = true;
+
+        $plugin = new Plugin($backend);
+        $plugin->autoRequireLogin = false;
+        $fakeServer->addPlugin($plugin);
+        $this->assertTrue(
+            $fakeServer->emit('beforeMethod', [new HTTP\Request(), new HTTP\Response()])
+        );
+        $this->assertEquals(1, count($plugin->getLoginFailedReasons()));
+
+    }
+
+    /**
      * @depends testAuthenticate
      */
     function testMultipleBackend() {
 
-        $fakeServer = new DAV\Server( new DAV\SimpleCollection('bla'));
+        $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
         $backend1 = new Backend\Mock();
         $backend2 = new Backend\Mock();
         $backend2->fail = true;
@@ -77,7 +94,7 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
      */
     function testNoAuthBackend() {
 
-        $fakeServer = new DAV\Server( new DAV\SimpleCollection('bla'));
+        $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
 
         $plugin = new Plugin();
         $fakeServer->addPlugin($plugin);
@@ -90,7 +107,7 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
      */
     function testInvalidCheckResponse() {
 
-        $fakeServer = new DAV\Server( new DAV\SimpleCollection('bla'));
+        $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
         $backend = new Backend\Mock();
         $backend->invalidCheckResponse = true;
 
@@ -105,7 +122,7 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
      */
     function testGetCurrentPrincipal() {
 
-        $fakeServer = new DAV\Server( new DAV\SimpleCollection('bla'));
+        $fakeServer = new DAV\Server(new DAV\SimpleCollection('bla'));
         $plugin = new Plugin(new Backend\Mock());
         $fakeServer->addPlugin($plugin);
         $fakeServer->emit('beforeMethod', [new HTTP\Request(), new HTTP\Response()]);
@@ -113,18 +130,4 @@ class PluginTest extends \PHPUnit_Framework_TestCase {
 
     }
 
-    /**
-     * @depends testAuthenticate
-     */
-    function testGetCurrentUser() {
-
-        $fakeServer = new DAV\Server( new DAV\SimpleCollection('bla'));
-        $plugin = new Plugin(new Backend\Mock());
-        $fakeServer->addPlugin($plugin);
-        $fakeServer->emit('beforeMethod', [new HTTP\Request(), new HTTP\Response()]);
-        $this->assertEquals('admin', $plugin->getCurrentUser());
-
-    }
-
 }
-
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/BasicNodeTest.php b/vendor/sabre/dav/tests/Sabre/DAV/BasicNodeTest.php
index 155c785f8..ec104ec80 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/BasicNodeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/BasicNodeTest.php
@@ -7,7 +7,7 @@ class BasicNodeTest extends \PHPUnit_Framework_TestCase {
     /**
      * @expectedException Sabre\DAV\Exception\Forbidden
      */
-    public function testPut() {
+    function testPut() {
 
         $file = new FileMock();
         $file->put('hi');
@@ -17,29 +17,29 @@ class BasicNodeTest extends \PHPUnit_Framework_TestCase {
     /**
      * @expectedException Sabre\DAV\Exception\Forbidden
      */
-    public function testGet() {
+    function testGet() {
 
         $file = new FileMock();
         $file->get();
 
     }
 
-    public function testGetSize() {
+    function testGetSize() {
 
         $file = new FileMock();
-        $this->assertEquals(0,$file->getSize());
+        $this->assertEquals(0, $file->getSize());
 
     }
 
 
-    public function testGetETag() {
+    function testGetETag() {
 
         $file = new FileMock();
         $this->assertNull($file->getETag());
 
     }
 
-    public function testGetContentType() {
+    function testGetContentType() {
 
         $file = new FileMock();
         $this->assertNull($file->getContentType());
@@ -49,7 +49,7 @@ class BasicNodeTest extends \PHPUnit_Framework_TestCase {
     /**
      * @expectedException Sabre\DAV\Exception\Forbidden
      */
-    public function testDelete() {
+    function testDelete() {
 
         $file = new FileMock();
         $file->delete();
@@ -59,24 +59,24 @@ class BasicNodeTest extends \PHPUnit_Framework_TestCase {
     /**
      * @expectedException Sabre\DAV\Exception\Forbidden
      */
-    public function testSetName() {
+    function testSetName() {
 
         $file = new FileMock();
         $file->setName('hi');
 
     }
 
-    public function testGetLastModified() {
+    function testGetLastModified() {
 
         $file = new FileMock();
         // checking if lastmod is within the range of a few seconds
         $lastMod = $file->getLastModified();
-        $compareTime = ($lastMod + 1)-time();
+        $compareTime = ($lastMod + 1) - time();
         $this->assertTrue($compareTime < 3);
 
     }
 
-    public function testGetChild() {
+    function testGetChild() {
 
         $dir = new DirectoryMock();
         $file = $dir->getChild('mockfile');
@@ -84,14 +84,14 @@ class BasicNodeTest extends \PHPUnit_Framework_TestCase {
 
     }
 
-    public function testChildExists() {
+    function testChildExists() {
 
         $dir = new DirectoryMock();
         $this->assertTrue($dir->childExists('mockfile'));
 
     }
 
-    public function testChildExistsFalse() {
+    function testChildExistsFalse() {
 
         $dir = new DirectoryMock();
         $this->assertFalse($dir->childExists('mockfile2'));
@@ -101,7 +101,7 @@ class BasicNodeTest extends \PHPUnit_Framework_TestCase {
     /**
      * @expectedException Sabre\DAV\Exception\NotFound
      */
-    public function testGetChild404() {
+    function testGetChild404() {
 
         $dir = new DirectoryMock();
         $file = $dir->getChild('blabla');
@@ -111,26 +111,26 @@ class BasicNodeTest extends \PHPUnit_Framework_TestCase {
     /**
      * @expectedException Sabre\DAV\Exception\Forbidden
      */
-    public function testCreateFile() {
+    function testCreateFile() {
 
         $dir = new DirectoryMock();
-        $dir->createFile('hello','data');
+        $dir->createFile('hello', 'data');
 
     }
 
     /**
      * @expectedException Sabre\DAV\Exception\Forbidden
      */
-    public function testCreateDirectory() {
+    function testCreateDirectory() {
 
         $dir = new DirectoryMock();
         $dir->createDirectory('hello');
 
     }
 
-    public function testSimpleDirectoryConstruct() {
+    function testSimpleDirectoryConstruct() {
 
-        $dir = new SimpleCollection('simpledir',array());
+        $dir = new SimpleCollection('simpledir', []);
         $this->assertInstanceOf('Sabre\DAV\SimpleCollection', $dir);
 
     }
@@ -138,13 +138,13 @@ class BasicNodeTest extends \PHPUnit_Framework_TestCase {
     /**
      * @depends testSimpleDirectoryConstruct
      */
-    public function testSimpleDirectoryConstructChild() {
+    function testSimpleDirectoryConstructChild() {
 
         $file = new FileMock();
-        $dir = new SimpleCollection('simpledir',array($file));
+        $dir = new SimpleCollection('simpledir', [$file]);
         $file2 = $dir->getChild('mockfile');
 
-        $this->assertEquals($file,$file2);
+        $this->assertEquals($file, $file2);
 
     }
 
@@ -152,23 +152,23 @@ class BasicNodeTest extends \PHPUnit_Framework_TestCase {
      * @expectedException Sabre\DAV\Exception
      * @depends testSimpleDirectoryConstruct
      */
-    public function testSimpleDirectoryBadParam() {
+    function testSimpleDirectoryBadParam() {
 
-        $dir = new SimpleCollection('simpledir',array('string shouldn\'t be here'));
+        $dir = new SimpleCollection('simpledir', ['string shouldn\'t be here']);
 
     }
 
     /**
      * @depends testSimpleDirectoryConstruct
      */
-    public function testSimpleDirectoryAddChild() {
+    function testSimpleDirectoryAddChild() {
 
         $file = new FileMock();
         $dir = new SimpleCollection('simpledir');
         $dir->addChild($file);
         $file2 = $dir->getChild('mockfile');
 
-        $this->assertEquals($file,$file2);
+        $this->assertEquals($file, $file2);
 
     }
 
@@ -176,23 +176,23 @@ class BasicNodeTest extends \PHPUnit_Framework_TestCase {
      * @depends testSimpleDirectoryConstruct
      * @depends testSimpleDirectoryAddChild
      */
-    public function testSimpleDirectoryGetChildren() {
+    function testSimpleDirectoryGetChildren() {
 
         $file = new FileMock();
         $dir = new SimpleCollection('simpledir');
         $dir->addChild($file);
 
-        $this->assertEquals(array($file),$dir->getChildren());
+        $this->assertEquals([$file], $dir->getChildren());
 
     }
 
     /*
      * @depends testSimpleDirectoryConstruct
      */
-    public function testSimpleDirectoryGetName() {
+    function testSimpleDirectoryGetName() {
 
         $dir = new SimpleCollection('simpledir');
-        $this->assertEquals('simpledir',$dir->getName());
+        $this->assertEquals('simpledir', $dir->getName());
 
     }
 
@@ -200,7 +200,7 @@ class BasicNodeTest extends \PHPUnit_Framework_TestCase {
      * @depends testSimpleDirectoryConstruct
      * @expectedException Sabre\DAV\Exception\NotFound
      */
-    public function testSimpleDirectoryGetChild404() {
+    function testSimpleDirectoryGetChild404() {
 
         $dir = new SimpleCollection('simpledir');
         $dir->getChild('blabla');
@@ -218,7 +218,7 @@ class DirectoryMock extends Collection {
 
     function getChildren() {
 
-        return array(new FileMock());
+        return [new FileMock()];
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Browser/GuessContentTypeTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Browser/GuessContentTypeTest.php
index 157c2170a..54a3053ec 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Browser/GuessContentTypeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Browser/GuessContentTypeTest.php
@@ -11,8 +11,8 @@ class GuessContentTypeTest extends DAV\AbstractServer {
 
         parent::setUp();
         \Sabre\TestUtil::clearTempDir();
-        file_put_contents(SABRE_TEMPDIR . '/somefile.jpg','blabla');
-        file_put_contents(SABRE_TEMPDIR . '/somefile.hoi','blabla');
+        file_put_contents(SABRE_TEMPDIR . '/somefile.jpg', 'blabla');
+        file_put_contents(SABRE_TEMPDIR . '/somefile.hoi', 'blabla');
 
     }
 
@@ -24,13 +24,13 @@ class GuessContentTypeTest extends DAV\AbstractServer {
 
     function testGetProperties() {
 
-        $properties = array(
+        $properties = [
             '{DAV:}getcontenttype',
-        );
-        $result = $this->server->getPropertiesForPath('/somefile.jpg',$properties);
-        $this->assertArrayHasKey(0,$result);
-        $this->assertArrayHasKey(404,$result[0]);
-        $this->assertArrayHasKey('{DAV:}getcontenttype',$result[0][404]);
+        ];
+        $result = $this->server->getPropertiesForPath('/somefile.jpg', $properties);
+        $this->assertArrayHasKey(0, $result);
+        $this->assertArrayHasKey(404, $result[0]);
+        $this->assertArrayHasKey('{DAV:}getcontenttype', $result[0][404]);
 
     }
 
@@ -40,14 +40,14 @@ class GuessContentTypeTest extends DAV\AbstractServer {
     function testGetPropertiesPluginEnabled() {
 
         $this->server->addPlugin(new GuessContentType());
-        $properties = array(
+        $properties = [
             '{DAV:}getcontenttype',
-        );
-        $result = $this->server->getPropertiesForPath('/somefile.jpg',$properties);
-        $this->assertArrayHasKey(0,$result);
-        $this->assertArrayHasKey(200,$result[0], 'We received: ' . print_r($result,true));
-        $this->assertArrayHasKey('{DAV:}getcontenttype',$result[0][200]);
-        $this->assertEquals('image/jpeg',$result[0][200]['{DAV:}getcontenttype']);
+        ];
+        $result = $this->server->getPropertiesForPath('/somefile.jpg', $properties);
+        $this->assertArrayHasKey(0, $result);
+        $this->assertArrayHasKey(200, $result[0], 'We received: ' . print_r($result, true));
+        $this->assertArrayHasKey('{DAV:}getcontenttype', $result[0][200]);
+        $this->assertEquals('image/jpeg', $result[0][200]['{DAV:}getcontenttype']);
 
     }
 
@@ -57,14 +57,14 @@ class GuessContentTypeTest extends DAV\AbstractServer {
     function testGetPropertiesUnknown() {
 
         $this->server->addPlugin(new GuessContentType());
-        $properties = array(
+        $properties = [
             '{DAV:}getcontenttype',
-        );
-        $result = $this->server->getPropertiesForPath('/somefile.hoi',$properties);
-        $this->assertArrayHasKey(0,$result);
-        $this->assertArrayHasKey(200,$result[0]);
-        $this->assertArrayHasKey('{DAV:}getcontenttype',$result[0][200]);
-        $this->assertEquals('application/octet-stream',$result[0][200]['{DAV:}getcontenttype']);
+        ];
+        $result = $this->server->getPropertiesForPath('/somefile.hoi', $properties);
+        $this->assertArrayHasKey(0, $result);
+        $this->assertArrayHasKey(200, $result[0]);
+        $this->assertArrayHasKey('{DAV:}getcontenttype', $result[0][200]);
+        $this->assertEquals('application/octet-stream', $result[0][200]['{DAV:}getcontenttype']);
 
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Browser/MapGetToPropFindTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Browser/MapGetToPropFindTest.php
index 9d9fbb319..33c4ede96 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Browser/MapGetToPropFindTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Browser/MapGetToPropFindTest.php
@@ -18,23 +18,23 @@ class MapGetToPropFindTest extends DAV\AbstractServer {
 
     function testCollectionGet() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/',
             'REQUEST_METHOD' => 'GET',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('');
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(207, $this->response->status,'Incorrect status response received. Full response body: ' . $this->response->body);
-        $this->assertEquals(array(
+        $this->assertEquals(207, $this->response->status, 'Incorrect status response received. Full response body: ' . $this->response->body);
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-            'DAV' => ['1, 3, extended-mkcol'],
-            'Vary' => ['Brief,Prefer'],
-            ),
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'DAV'             => ['1, 3, extended-mkcol'],
+            'Vary'            => ['Brief,Prefer'],
+            ],
             $this->response->getHeaders()
          );
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Browser/PluginTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Browser/PluginTest.php
index 00beea9f2..f20c50f86 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Browser/PluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Browser/PluginTest.php
@@ -28,16 +28,16 @@ class PluginTest extends DAV\AbstractServer{
         $this->assertEquals(200, $this->response->getStatus(), "Incorrect status received. Full response body: " . $this->response->getBodyAsString());
         $this->assertEquals(
             [
-                'X-Sabre-Version' => [DAV\Version::VERSION],
-                'Content-Type' => ['text/html; charset=utf-8'],
-                'Content-Security-Policy' => ["img-src 'self'; style-src 'self';"]
+                'X-Sabre-Version'         => [DAV\Version::VERSION],
+                'Content-Type'            => ['text/html; charset=utf-8'],
+                'Content-Security-Policy' => ["default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';"]
             ],
             $this->response->getHeaders()
         );
 
         $body = $this->response->getBodyAsString();
         $this->assertTrue(strpos($body, '<title>dir') !== false, $body);
-        $this->assertTrue(strpos($body, '<a href="/dir/child.txt">')!==false);
+        $this->assertTrue(strpos($body, '<a href="/dir/child.txt">') !== false);
 
     }
 
@@ -54,16 +54,16 @@ class PluginTest extends DAV\AbstractServer{
         $this->assertEquals(200, $this->response->getStatus(), "Incorrect status received. Full response body: " . $this->response->getBodyAsString());
         $this->assertEquals(
             [
-                'X-Sabre-Version' => [DAV\Version::VERSION],
-                'Content-Type' => ['text/html; charset=utf-8'],
-                'Content-Security-Policy' => ["img-src 'self'; style-src 'self';"]
+                'X-Sabre-Version'         => [DAV\Version::VERSION],
+                'Content-Type'            => ['text/html; charset=utf-8'],
+                'Content-Security-Policy' => ["default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';"]
             ],
             $this->response->getHeaders()
         );
 
         $body = $this->response->getBodyAsString();
         $this->assertTrue(strpos($body, '<title>dir') !== false, $body);
-        $this->assertTrue(strpos($body, '<a href="/dir/child.txt">')!==false);
+        $this->assertTrue(strpos($body, '<a href="/dir/child.txt">') !== false);
 
     }
     function testCollectionGetRoot() {
@@ -75,17 +75,17 @@ class PluginTest extends DAV\AbstractServer{
         $this->assertEquals(200, $this->response->status, "Incorrect status received. Full response body: " . $this->response->getBodyAsString());
         $this->assertEquals(
             [
-                'X-Sabre-Version' => [DAV\Version::VERSION],
-                'Content-Type' => ['text/html; charset=utf-8'],
-                'Content-Security-Policy' => ["img-src 'self'; style-src 'self';"]
+                'X-Sabre-Version'         => [DAV\Version::VERSION],
+                'Content-Type'            => ['text/html; charset=utf-8'],
+                'Content-Security-Policy' => ["default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';"]
             ],
             $this->response->getHeaders()
         );
 
         $body = $this->response->getBodyAsString();
         $this->assertTrue(strpos($body, '<title>/') !== false, $body);
-        $this->assertTrue(strpos($body, '<a href="/dir/">')!==false);
-        $this->assertTrue(strpos($body, '<span class="btn disabled">')!==false);
+        $this->assertTrue(strpos($body, '<a href="/dir/">') !== false);
+        $this->assertTrue(strpos($body, '<span class="btn disabled">') !== false);
 
     }
 
@@ -122,15 +122,15 @@ class PluginTest extends DAV\AbstractServer{
 
     function testPostMkCol() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/',
             'REQUEST_METHOD' => 'POST',
-            'CONTENT_TYPE' => 'application/x-www-form-urlencoded',
-        );
-        $postVars = array(
+            'CONTENT_TYPE'   => 'application/x-www-form-urlencoded',
+        ];
+        $postVars = [
             'sabreAction' => 'mkcol',
-            'name' => 'new_collection',
-        );
+            'name'        => 'new_collection',
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setPostData($postVars);
@@ -138,10 +138,10 @@ class PluginTest extends DAV\AbstractServer{
         $this->server->exec();
 
         $this->assertEquals(302, $this->response->status);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Location' => ['/'],
-        ), $this->response->getHeaders());
+            'Location'        => ['/'],
+        ], $this->response->getHeaders());
 
         $this->assertTrue(is_dir(SABRE_TEMPDIR . '/new_collection'));
 
@@ -155,11 +155,11 @@ class PluginTest extends DAV\AbstractServer{
 
         $this->assertEquals(200, $this->response->getStatus(), 'Error: ' . $this->response->body);
         $this->assertEquals([
-            'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['image/vnd.microsoft.icon'],
-            'Content-Length' => ['4286'],
-            'Cache-Control' => ['public, max-age=1209600'],
-            'Content-Security-Policy' => ["img-src 'self'; style-src 'self';"]
+            'X-Sabre-Version'         => [DAV\Version::VERSION],
+            'Content-Type'            => ['image/vnd.microsoft.icon'],
+            'Content-Length'          => ['4286'],
+            'Cache-Control'           => ['public, max-age=1209600'],
+            'Content-Security-Policy' => ["default-src 'none'; img-src 'self'; style-src 'self'; font-src 'self';"]
         ], $this->response->getHeaders());
 
     }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ClientMock.php b/vendor/sabre/dav/tests/Sabre/DAV/ClientMock.php
index d8b53a5a1..5a48b063c 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ClientMock.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ClientMock.php
@@ -18,13 +18,13 @@ class ClientMock extends Client {
      * @param string $url
      * @return string
      */
-    public function getAbsoluteUrl($url) {
+    function getAbsoluteUrl($url) {
 
         return parent::getAbsoluteUrl($url);
 
     }
 
-    public function doRequest(RequestInterface $request) {
+    function doRequest(RequestInterface $request) {
 
         $this->request = $request;
         return $this->response;
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Exception/LockedTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Exception/LockedTest.php
index c06d6aa1f..8788475cb 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Exception/LockedTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Exception/LockedTest.php
@@ -2,9 +2,8 @@
 
 namespace Sabre\DAV\Exception;
 
-use
-    Sabre\DAV,
-    DOMDocument;
+use Sabre\DAV;
+use DOMDocument;
 
 class LockedTest extends \PHPUnit_Framework_TestCase {
 
@@ -15,7 +14,7 @@ class LockedTest extends \PHPUnit_Framework_TestCase {
         $root = $dom->createElement('d:root');
 
         $dom->appendChild($root);
-        $root->setAttribute('xmlns:d','DAV:');
+        $root->setAttribute('xmlns:d', 'DAV:');
 
         $lockInfo = new DAV\Locks\LockInfo();
         $lockInfo->uri = '/foo';
@@ -44,7 +43,7 @@ class LockedTest extends \PHPUnit_Framework_TestCase {
         $root = $dom->createElement('d:root');
 
         $dom->appendChild($root);
-        $root->setAttribute('xmlns:d','DAV:');
+        $root->setAttribute('xmlns:d', 'DAV:');
 
         $lockInfo = new DAV\Locks\LockInfo();
         $lockInfo->uri = '/foo&bar';
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ExceptionTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ExceptionTest.php
index 6d6bf5668..0eb4f3dd8 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ExceptionTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ExceptionTest.php
@@ -7,18 +7,18 @@ class ExceptionTest extends \PHPUnit_Framework_TestCase {
     function testStatus() {
 
         $e = new Exception();
-        $this->assertEquals(500,$e->getHTTPCode());
+        $this->assertEquals(500, $e->getHTTPCode());
 
     }
 
     function testExceptionStatuses() {
 
-        $c = array(
+        $c = [
             'Sabre\\DAV\\Exception\\NotAuthenticated'    => 401,
             'Sabre\\DAV\\Exception\\InsufficientStorage' => 507,
-        );
+        ];
 
-        foreach($c as $class=>$status) {
+        foreach ($c as $class => $status) {
 
             $obj = new $class();
             $this->assertEquals($status, $obj->getHTTPCode());
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/FSExt/FileTest.php b/vendor/sabre/dav/tests/Sabre/DAV/FSExt/FileTest.php
index 3708594e0..f5d65a44f 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/FSExt/FileTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/FSExt/FileTest.php
@@ -2,8 +2,6 @@
 
 namespace Sabre\DAV\FSExt;
 
-use Sabre\DAV;
-
 require_once 'Sabre/TestUtil.php';
 
 class FileTest extends \PHPUnit_Framework_TestCase {
@@ -26,12 +24,12 @@ class FileTest extends \PHPUnit_Framework_TestCase {
         $file = new File($filename);
         $result = $file->put('New contents');
 
-        $this->assertEquals('New contents',file_get_contents(SABRE_TEMPDIR . '/file.txt'));
+        $this->assertEquals('New contents', file_get_contents(SABRE_TEMPDIR . '/file.txt'));
         $this->assertEquals(
             '"' .
             sha1(
                 fileinode($filename) .
-                filesize($filename ) .
+                filesize($filename) .
                 filemtime($filename)
             ) . '"',
             $result
@@ -45,13 +43,13 @@ class FileTest extends \PHPUnit_Framework_TestCase {
         $file->put('0000000');
         $file->patch('111', 2, 3);
 
-        $this->assertEquals('0001110',file_get_contents(SABRE_TEMPDIR . '/file.txt'));
+        $this->assertEquals('0001110', file_get_contents(SABRE_TEMPDIR . '/file.txt'));
 
     }
 
     function testRangeStream() {
 
-        $stream = fopen('php://memory','r+');
+        $stream = fopen('php://memory', 'r+');
         fwrite($stream, "222");
         rewind($stream);
 
@@ -59,7 +57,7 @@ class FileTest extends \PHPUnit_Framework_TestCase {
         $file->put('0000000');
         $file->patch($stream, 2, 3);
 
-        $this->assertEquals('0002220',file_get_contents(SABRE_TEMPDIR . '/file.txt'));
+        $this->assertEquals('0002220', file_get_contents(SABRE_TEMPDIR . '/file.txt'));
 
     }
 
@@ -67,7 +65,7 @@ class FileTest extends \PHPUnit_Framework_TestCase {
     function testGet() {
 
         $file = new File(SABRE_TEMPDIR . '/file.txt');
-        $this->assertEquals('Contents',stream_get_contents($file->get()));
+        $this->assertEquals('Contents', stream_get_contents($file->get()));
 
     }
 
@@ -88,7 +86,7 @@ class FileTest extends \PHPUnit_Framework_TestCase {
             '"' .
             sha1(
                 fileinode($filename) .
-                filesize($filename ) .
+                filesize($filename) .
                 filemtime($filename)
             ) . '"',
             $file->getETag()
@@ -105,7 +103,7 @@ class FileTest extends \PHPUnit_Framework_TestCase {
     function testGetSize() {
 
         $file = new File(SABRE_TEMPDIR . '/file.txt');
-        $this->assertEquals(8,$file->getSize());
+        $this->assertEquals(8, $file->getSize());
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/FSExt/ServerTest.php b/vendor/sabre/dav/tests/Sabre/DAV/FSExt/ServerTest.php
index 63d858de1..20fca490a 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/FSExt/ServerTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/FSExt/ServerTest.php
@@ -28,7 +28,7 @@ class ServerTest extends DAV\AbstractServer{
             'Content-Type'    => ['application/octet-stream'],
             'Content-Length'  => [13],
             'Last-Modified'   => [HTTP\Util::toHTTPDate(new \DateTime('@' . filemtime($filename)))],
-            'ETag'            => ['"' . sha1(fileinode($filename ) . filesize($filename) . filemtime($filename)) . '"'],
+            'ETag'            => ['"' . sha1(fileinode($filename) . filesize($filename) . filemtime($filename)) . '"'],
             ],
             $this->response->getHeaders()
          );
@@ -50,12 +50,12 @@ class ServerTest extends DAV\AbstractServer{
             'Content-Type'    => ['application/octet-stream'],
             'Content-Length'  => [13],
             'Last-Modified'   => [HTTP\Util::toHTTPDate(new \DateTime('@' . filemtime($this->tempDir . '/test.txt')))],
-            'ETag'            => ['"' . sha1(fileinode($filename ) . filesize($filename) . filemtime($filename)) . '"'],
+            'ETag'            => ['"' . sha1(fileinode($filename) . filesize($filename) . filemtime($filename)) . '"'],
             ],
             $this->response->getHeaders()
          );
 
-        $this->assertEquals(200,$this->response->status);
+        $this->assertEquals(200, $this->response->status);
         $this->assertEquals('', $this->response->body);
 
     }
@@ -71,12 +71,12 @@ class ServerTest extends DAV\AbstractServer{
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
             'Content-Length'  => ['0'],
-            'ETag'            => ['"' . sha1(fileinode($filename ) . filesize($filename) . filemtime($filename)) . '"'],
+            'ETag'            => ['"' . sha1(fileinode($filename) . filesize($filename) . filemtime($filename)) . '"'],
         ], $this->response->getHeaders());
 
         $this->assertEquals(201, $this->response->status);
         $this->assertEquals('', $this->response->body);
-        $this->assertEquals('Testing new file',file_get_contents($filename));
+        $this->assertEquals('Testing new file', file_get_contents($filename));
 
     }
 
@@ -89,11 +89,11 @@ class ServerTest extends DAV\AbstractServer{
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ],$this->response->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $this->response->getHeaders());
 
         $this->assertEquals(412, $this->response->status);
-        $this->assertNotEquals('Testing new file',file_get_contents($this->tempDir . '/test.txt'));
+        $this->assertNotEquals('Testing new file', file_get_contents($this->tempDir . '/test.txt'));
 
     }
 
@@ -105,8 +105,8 @@ class ServerTest extends DAV\AbstractServer{
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Length' => ['0'],
-        ],$this->response->getHeaders());
+            'Content-Length'  => ['0'],
+        ], $this->response->getHeaders());
 
         $this->assertEquals(201, $this->response->status);
         $this->assertEquals('', $this->response->body);
@@ -125,7 +125,7 @@ class ServerTest extends DAV\AbstractServer{
 
         $this->assertEquals(204, $this->response->status);
         $this->assertEquals('', $this->response->body);
-        $this->assertEquals('Testing updated file',file_get_contents($this->tempDir . '/test.txt'));
+        $this->assertEquals('Testing updated file', file_get_contents($this->tempDir . '/test.txt'));
 
     }
 
@@ -137,8 +137,8 @@ class ServerTest extends DAV\AbstractServer{
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Length' => ['0'],
-        ],$this->response->getHeaders());
+            'Content-Length'  => ['0'],
+        ], $this->response->getHeaders());
 
         $this->assertEquals(204, $this->response->status);
         $this->assertEquals('', $this->response->body);
@@ -148,8 +148,8 @@ class ServerTest extends DAV\AbstractServer{
 
     function testDeleteDirectory() {
 
-        mkdir($this->tempDir.'/testcol');
-        file_put_contents($this->tempDir.'/testcol/test.txt','Hi! I\'m a file with a short lifespan');
+        mkdir($this->tempDir . '/testcol');
+        file_put_contents($this->tempDir . '/testcol/test.txt', 'Hi! I\'m a file with a short lifespan');
 
         $request = new HTTP\Request('DELETE', '/testcol');
         $this->server->httpRequest = ($request);
@@ -157,8 +157,8 @@ class ServerTest extends DAV\AbstractServer{
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Length' => ['0'],
-        ],$this->response->getHeaders());
+            'Content-Length'  => ['0'],
+        ], $this->response->getHeaders());
         $this->assertEquals(204, $this->response->status);
         $this->assertEquals('', $this->response->body);
         $this->assertFalse(file_exists($this->tempDir . '/testcol'));
@@ -172,12 +172,12 @@ class ServerTest extends DAV\AbstractServer{
         $this->server->exec();
 
         $this->assertEquals([
-            'DAV'            => ['1, 3, extended-mkcol'],
-            'MS-Author-Via'  => ['DAV'],
-            'Allow'          => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT'],
-            'Accept-Ranges'  => ['bytes'],
-            'Content-Length' => ['0'],
-            'X-Sabre-Version'=> [DAV\Version::VERSION],
+            'DAV'             => ['1, 3, extended-mkcol'],
+            'MS-Author-Via'   => ['DAV'],
+            'Allow'           => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT'],
+            'Accept-Ranges'   => ['bytes'],
+            'Content-Length'  => ['0'],
+            'X-Sabre-Version' => [DAV\Version::VERSION],
         ], $this->response->getHeaders());
 
         $this->assertEquals(200, $this->response->status);
@@ -187,7 +187,7 @@ class ServerTest extends DAV\AbstractServer{
 
     function testMove() {
 
-        mkdir($this->tempDir.'/testcol');
+        mkdir($this->tempDir . '/testcol');
 
         $request = new HTTP\Request('MOVE', '/test.txt', ['Destination' => '/testcol/test2.txt']);
         $this->server->httpRequest = ($request);
@@ -197,9 +197,9 @@ class ServerTest extends DAV\AbstractServer{
         $this->assertEquals('', $this->response->body);
 
         $this->assertEquals([
-            'Content-Length' => ['0'],
-            'X-Sabre-Version'=> [DAV\Version::VERSION],
-        ],$this->response->getHeaders());
+            'Content-Length'  => ['0'],
+            'X-Sabre-Version' => [DAV\Version::VERSION],
+        ], $this->response->getHeaders());
 
         $this->assertTrue(
             is_file($this->tempDir . '/testcol/test2.txt')
@@ -217,8 +217,8 @@ class ServerTest extends DAV\AbstractServer{
      */
     function testMoveOtherObject() {
 
-        mkdir($this->tempDir.'/tree1');
-        mkdir($this->tempDir.'/tree2');
+        mkdir($this->tempDir . '/tree1');
+        mkdir($this->tempDir . '/tree2');
 
         $tree = new DAV\Tree(new DAV\SimpleCollection('root', [
             new DAV\FS\Directory($this->tempDir . '/tree1'),
@@ -234,9 +234,9 @@ class ServerTest extends DAV\AbstractServer{
         $this->assertEquals('', $this->response->body);
 
         $this->assertEquals([
-            'Content-Length' => ['0'],
-            'X-Sabre-Version'=> [DAV\Version::VERSION],
-        ],$this->response->getHeaders());
+            'Content-Length'  => ['0'],
+            'X-Sabre-Version' => [DAV\Version::VERSION],
+        ], $this->response->getHeaders());
 
         $this->assertTrue(
             is_dir($this->tempDir . '/tree2/tree1')
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/HttpDeleteTest.php b/vendor/sabre/dav/tests/Sabre/DAV/HttpDeleteTest.php
index 6c10afa9f..bd1b33150 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/HttpDeleteTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/HttpDeleteTest.php
@@ -19,12 +19,12 @@ class HttpDeleteTest extends DAVServerTest {
      *
      * @return void
      */
-    public function setUpTree() {
+    function setUpTree() {
 
         $this->tree = new Mock\Collection('root', [
             'file1' => 'foo',
-            'dir' => [
-                'subfile' => 'bar',
+            'dir'   => [
+                'subfile'  => 'bar',
                 'subfile2' => 'baz',
             ],
         ]);
@@ -34,7 +34,7 @@ class HttpDeleteTest extends DAVServerTest {
     /**
      * A successful DELETE
      */
-    public function testDelete() {
+    function testDelete() {
 
         $request = new HTTP\Request('DELETE', '/file1');
 
@@ -49,7 +49,7 @@ class HttpDeleteTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length' => ['0'],
+                'Content-Length'  => ['0'],
             ],
             $response->getHeaders()
         );
@@ -59,7 +59,7 @@ class HttpDeleteTest extends DAVServerTest {
     /**
      * Deleting a Directory
      */
-    public function testDeleteDirectory() {
+    function testDeleteDirectory() {
 
         $request = new HTTP\Request('DELETE', '/dir');
 
@@ -74,7 +74,7 @@ class HttpDeleteTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length' => ['0'],
+                'Content-Length'  => ['0'],
             ],
             $response->getHeaders()
         );
@@ -84,7 +84,7 @@ class HttpDeleteTest extends DAVServerTest {
     /**
      * DELETE on a node that does not exist
      */
-    public function testDeleteNotFound() {
+    function testDeleteNotFound() {
 
         $request = new HTTP\Request('DELETE', '/file2');
         $response = $this->request($request);
@@ -100,7 +100,7 @@ class HttpDeleteTest extends DAVServerTest {
     /**
      * DELETE with preconditions
      */
-    public function testDeletePreconditions() {
+    function testDeletePreconditions() {
 
         $request = new HTTP\Request('DELETE', '/file1', [
             'If-Match' => '"' . md5('foo') . '"',
@@ -119,7 +119,7 @@ class HttpDeleteTest extends DAVServerTest {
     /**
      * DELETE with incorrect preconditions
      */
-    public function testDeletePreconditionsFailed() {
+    function testDeletePreconditionsFailed() {
 
         $request = new HTTP\Request('DELETE', '/file1', [
             'If-Match' => '"' . md5('bar') . '"',
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/HttpPutTest.php b/vendor/sabre/dav/tests/Sabre/DAV/HttpPutTest.php
index eddaf3f22..86480b1c2 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/HttpPutTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/HttpPutTest.php
@@ -46,8 +46,8 @@ class HttpPutTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length' => ['0'],
-                'ETag' => ['"' . md5('hello') . '"']
+                'Content-Length'  => ['0'],
+                'ETag'            => ['"' . md5('hello') . '"']
             ],
             $response->getHeaders()
         );
@@ -75,8 +75,8 @@ class HttpPutTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length' => ['0'],
-                'ETag' => ['"' . md5('bar') . '"']
+                'Content-Length'  => ['0'],
+                'ETag'            => ['"' . md5('bar') . '"']
             ],
             $response->getHeaders()
         );
@@ -109,8 +109,8 @@ class HttpPutTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length' => ['0'],
-                'ETag' => ['"' . md5('hello') . '"']
+                'Content-Length'  => ['0'],
+                'ETag'            => ['"' . md5('hello') . '"']
             ],
             $response->getHeaders()
         );
@@ -143,8 +143,8 @@ class HttpPutTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length' => ['0'],
-                'ETag' => ['"' . md5('hello') . '"'],
+                'Content-Length'  => ['0'],
+                'ETag'            => ['"' . md5('hello') . '"'],
             ],
             $response->getHeaders()
         );
@@ -196,8 +196,8 @@ class HttpPutTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length' => ['0'],
-                'ETag' => ['"' . md5('hello') . '"']
+                'Content-Length'  => ['0'],
+                'ETag'            => ['"' . md5('hello') . '"']
             ],
             $response->getHeaders()
         );
@@ -291,8 +291,8 @@ class HttpPutTest extends DAVServerTest {
         $this->assertEquals(
             [
                 'X-Sabre-Version' => [Version::VERSION],
-                'Content-Length' => ['0'],
-                'ETag' => ['"' . md5('hello') . '"'],
+                'Content-Length'  => ['0'],
+                'ETag'            => ['"' . md5('hello') . '"'],
             ],
             $response->getHeaders()
         );
@@ -334,7 +334,7 @@ class HttpPutTest extends DAVServerTest {
         $request = new HTTP\Request('PUT', '/file2', [], 'hello');
         $response = $this->request($request);
 
-        $this->assertEquals(418, $response->getStatus(), 'Incorrect status code received. Full response body: ' .$response->getBodyAsString());
+        $this->assertEquals(418, $response->getStatus(), 'Incorrect status code received. Full response body: ' . $response->getBodyAsString());
 
         $this->assertFalse(
             $this->server->tree->nodeExists('file2')
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Issue33Test.php b/vendor/sabre/dav/tests/Sabre/DAV/Issue33Test.php
index 4ccb42fbb..edd09e634 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Issue33Test.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Issue33Test.php
@@ -17,16 +17,16 @@ class Issue33Test extends \PHPUnit_Framework_TestCase {
     function testCopyMoveInfo() {
 
         $bar = new SimpleCollection('bar');
-        $root = new SimpleCollection('webdav',array($bar));
+        $root = new SimpleCollection('webdav', [$bar]);
 
         $server = new Server($root);
         $server->setBaseUri('/webdav/');
 
-        $serverVars = array(
-            'REQUEST_URI' => '/webdav/bar',
+        $serverVars = [
+            'REQUEST_URI'      => '/webdav/bar',
             'HTTP_DESTINATION' => 'http://dev2.tribalos.com/webdav/%C3%A0fo%C3%B3',
-            'HTTP_OVERWRITE' => 'F',
-        );
+            'HTTP_OVERWRITE'   => 'F',
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
 
@@ -48,19 +48,19 @@ class Issue33Test extends \PHPUnit_Framework_TestCase {
         $dir->createDirectory('bar');
 
         $tree = new Tree($dir);
-        $tree->move('bar',urldecode('%C3%A0fo%C3%B3'));
+        $tree->move('bar', urldecode('%C3%A0fo%C3%B3'));
 
         $node = $tree->getNodeForPath(urldecode('%C3%A0fo%C3%B3'));
-        $this->assertEquals(urldecode('%C3%A0fo%C3%B3'),$node->getName());
+        $this->assertEquals(urldecode('%C3%A0fo%C3%B3'), $node->getName());
 
     }
 
     function testDirName() {
 
         $dirname1 = 'bar';
-        $dirname2 = urlencode('%C3%A0fo%C3%B3');;
+        $dirname2 = urlencode('%C3%A0fo%C3%B3');
 
-        $this->assertTrue(dirname($dirname1)==dirname($dirname2));
+        $this->assertTrue(dirname($dirname1) == dirname($dirname2));
 
     }
 
@@ -71,12 +71,12 @@ class Issue33Test extends \PHPUnit_Framework_TestCase {
     function testEverything() {
 
         // Request object
-        $serverVars = array(
-            'REQUEST_METHOD' => 'MOVE',
-            'REQUEST_URI' => '/webdav/bar',
+        $serverVars = [
+            'REQUEST_METHOD'   => 'MOVE',
+            'REQUEST_URI'      => '/webdav/bar',
             'HTTP_DESTINATION' => 'http://dev2.tribalos.com/webdav/%C3%A0fo%C3%B3',
-            'HTTP_OVERWRITE' => 'F',
-        );
+            'HTTP_OVERWRITE'   => 'F',
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('');
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/AbstractTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/AbstractTest.php
index f39e9a036..bbde69097 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/AbstractTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/AbstractTest.php
@@ -31,15 +31,15 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
         $lock->timeout = 60;
         $lock->created = time();
         $lock->token = 'MY-UNIQUE-TOKEN';
-        $lock->uri ='someuri';
+        $lock->uri = 'someuri';
 
         $this->assertTrue($backend->lock('someuri', $lock));
 
         $locks = $backend->getLocks('someuri', false);
 
-        $this->assertEquals(1,count($locks));
-        $this->assertEquals('Sinterklaas',$locks[0]->owner);
-        $this->assertEquals('someuri',$locks[0]->uri);
+        $this->assertEquals(1, count($locks));
+        $this->assertEquals('Sinterklaas', $locks[0]->owner);
+        $this->assertEquals('someuri', $locks[0]->uri);
 
     }
 
@@ -61,9 +61,9 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
 
         $locks = $backend->getLocks('someuri/child', false);
 
-        $this->assertEquals(1,count($locks));
-        $this->assertEquals('Sinterklaas',$locks[0]->owner);
-        $this->assertEquals('someuri',$locks[0]->uri);
+        $this->assertEquals(1, count($locks));
+        $this->assertEquals('Sinterklaas', $locks[0]->owner);
+        $this->assertEquals('someuri', $locks[0]->uri);
 
     }
 
@@ -86,7 +86,7 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
 
         $locks = $backend->getLocks('someuri/child', false);
 
-        $this->assertEquals(0,count($locks));
+        $this->assertEquals(0, count($locks));
 
     }
 
@@ -104,13 +104,13 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
         $this->assertTrue($backend->lock('someuri/child', $lock));
 
         $locks = $backend->getLocks('someuri/child', false);
-        $this->assertEquals(1,count($locks));
+        $this->assertEquals(1, count($locks));
 
         $locks = $backend->getLocks('someuri', false);
-        $this->assertEquals(0,count($locks));
+        $this->assertEquals(0, count($locks));
 
         $locks = $backend->getLocks('someuri', true);
-        $this->assertEquals(1,count($locks));
+        $this->assertEquals(1, count($locks));
 
     }
 
@@ -135,10 +135,10 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
 
         $locks = $backend->getLocks('someuri', false);
 
-        $this->assertEquals(1,count($locks));
+        $this->assertEquals(1, count($locks));
 
-        $this->assertEquals('Santa Clause',$locks[0]->owner);
-        $this->assertEquals('someuri',$locks[0]->uri);
+        $this->assertEquals('Santa Clause', $locks[0]->owner);
+        $this->assertEquals('someuri', $locks[0]->uri);
 
     }
 
@@ -158,12 +158,12 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
         $this->assertTrue($backend->lock('someuri', $lock));
 
         $locks = $backend->getLocks('someuri', false);
-        $this->assertEquals(1,count($locks));
+        $this->assertEquals(1, count($locks));
 
-        $this->assertTrue($backend->unlock('someuri',$lock));
+        $this->assertTrue($backend->unlock('someuri', $lock));
 
         $locks = $backend->getLocks('someuri', false);
-        $this->assertEquals(0,count($locks));
+        $this->assertEquals(0, count($locks));
 
     }
 
@@ -183,13 +183,13 @@ abstract class AbstractTest extends \PHPUnit_Framework_TestCase {
         $this->assertTrue($backend->lock('someuri', $lock));
 
         $locks = $backend->getLocks('someuri', false);
-        $this->assertEquals(1,count($locks));
+        $this->assertEquals(1, count($locks));
 
         $lock->token = 'SOME-OTHER-TOKEN';
-        $this->assertFalse($backend->unlock('someuri',$lock));
+        $this->assertFalse($backend->unlock('someuri', $lock));
 
         $locks = $backend->getLocks('someuri', false);
-        $this->assertEquals(1,count($locks));
+        $this->assertEquals(1, count($locks));
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOMySQLTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOMySQLTest.php
index b6f06224c..0ba02fc8b 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOMySQLTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOMySQLTest.php
@@ -2,31 +2,8 @@
 
 namespace Sabre\DAV\Locks\Backend;
 
-require_once 'Sabre/TestUtil.php';
+class PDOMySQLTest extends PDOTest {
 
-class PDOMySQLTest extends AbstractTest {
-
-    function getBackend() {
-
-        if (!SABRE_HASMYSQL) $this->markTestSkipped('MySQL driver is not available, or it was not properly configured');
-        $pdo = \Sabre\TestUtil::getMySQLDB();
-        if (!$pdo) $this->markTestSkipped('Could not connect to MySQL database');
-        $pdo->query('DROP TABLE IF EXISTS locks;');
-        $pdo->query("
-CREATE TABLE locks (
-	id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-	owner VARCHAR(100),
-	timeout INTEGER UNSIGNED,
-	created INTEGER,
-	token VARCHAR(100),
-	scope TINYINT,
-	depth TINYINT,
-	uri text
-);");
-
-        $backend = new PDO($pdo);
-        return $backend;
-
-    }
+    public $driver = 'mysql';
 
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOTest.php
index d6336c7b2..a27eae93c 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Locks/Backend/PDOTest.php
@@ -2,27 +2,18 @@
 
 namespace Sabre\DAV\Locks\Backend;
 
-require_once 'Sabre/TestUtil.php';
-require_once 'Sabre/DAV/Locks/Backend/AbstractTest.php';
+abstract class PDOTest extends AbstractTest {
 
-class PDOTest extends AbstractTest {
+    use \Sabre\DAV\DbTestHelperTrait;
 
     function getBackend() {
 
-        if (!SABRE_HASSQLITE) $this->markTestSkipped('SQLite driver is not available');
-        \Sabre\TestUtil::clearTempDir();
-        mkdir(SABRE_TEMPDIR . '/pdolocks');
-        $pdo = new \PDO('sqlite:' . SABRE_TEMPDIR . '/pdolocks/db.sqlite');
-        $pdo->setAttribute(\PDO::ATTR_ERRMODE,\PDO::ERRMODE_EXCEPTION);
-        $pdo->query('CREATE TABLE locks ( id integer primary key asc, owner text, timeout text, created integer, token text, scope integer, depth integer, uri text)');
-        $backend = new PDO($pdo);
-        return $backend;
+        $this->dropTables('locks');
+        $this->createSchema('locks');
 
-    }
-
-    function tearDown() {
+        $pdo = $this->getPDO();
 
-        \Sabre\TestUtil::clearTempDir();
+        return new PDO($pdo);
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Locks/MSWordTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Locks/MSWordTest.php
index 23f283796..f08f19da5 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Locks/MSWordTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Locks/MSWordTest.php
@@ -62,12 +62,12 @@ class MSWordTest extends \PHPUnit_Framework_TestCase {
 
     function getLockRequest() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
            'REQUEST_METHOD'    => 'LOCK',
            'HTTP_CONTENT_TYPE' => 'application/xml',
            'HTTP_TIMEOUT'      => 'Second-3600',
            'REQUEST_URI'       => '/Nouveau%20Microsoft%20Office%20Excel%20Worksheet.xlsx',
-        ));
+        ]);
 
         $request->setBody('<D:lockinfo xmlns:D="DAV:">
     <D:lockscope>
@@ -86,12 +86,12 @@ class MSWordTest extends \PHPUnit_Framework_TestCase {
     }
     function getLockRequest2() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
            'REQUEST_METHOD'    => 'LOCK',
            'HTTP_CONTENT_TYPE' => 'application/xml',
            'HTTP_TIMEOUT'      => 'Second-3600',
            'REQUEST_URI'       => '/~$Nouveau%20Microsoft%20Office%20Excel%20Worksheet.xlsx',
-        ));
+        ]);
 
         $request->setBody('<D:lockinfo xmlns:D="DAV:">
     <D:lockscope>
@@ -111,11 +111,11 @@ class MSWordTest extends \PHPUnit_Framework_TestCase {
 
     function getPutRequest($lockToken) {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
            'REQUEST_METHOD'    => 'PUT',
            'REQUEST_URI'       => '/Nouveau%20Microsoft%20Office%20Excel%20Worksheet.xlsx',
-           'HTTP_IF'           => 'If: ('.$lockToken.')',
-        ));
+           'HTTP_IF'           => 'If: (' . $lockToken . ')',
+        ]);
         $request->setBody('FAKE BODY');
         return $request;
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Locks/PluginTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Locks/PluginTest.php
index ef0e473ae..6511d4e7d 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Locks/PluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Locks/PluginTest.php
@@ -35,13 +35,13 @@ class PluginTest extends DAV\AbstractServer {
 
     function testGetFeatures() {
 
-        $this->assertEquals(array(2),$this->locksPlugin->getFeatures());
+        $this->assertEquals([2], $this->locksPlugin->getFeatures());
 
     }
 
     function testGetHTTPMethods() {
 
-        $this->assertEquals(array('LOCK','UNLOCK'),$this->locksPlugin->getHTTPMethods(''));
+        $this->assertEquals(['LOCK', 'UNLOCK'], $this->locksPlugin->getHTTPMethods(''));
 
     }
 
@@ -51,10 +51,10 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-            ),
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+            ],
             $this->response->getHeaders()
          );
 
@@ -77,16 +77,16 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
-        $this->assertEquals(200, $this->response->status,'Got an incorrect status back. Response body: ' . $this->response->body);
+        $this->assertEquals(200, $this->response->status, 'Got an incorrect status back. Response body: ' . $this->response->body);
 
-        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/","xmlns\\1=\"urn:DAV\"",$this->response->body);
+        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", "xmlns\\1=\"urn:DAV\"", $this->response->body);
         $xml = simplexml_load_string($body);
-        $xml->registerXPathNamespace('d','urn:DAV');
+        $xml->registerXPathNamespace('d', 'urn:DAV');
 
-        $elements = array(
+        $elements = [
             '/d:prop',
             '/d:prop/d:lockdiscovery',
             '/d:prop/d:lockdiscovery/d:activelock',
@@ -101,18 +101,18 @@ class PluginTest extends DAV\AbstractServer {
             '/d:prop/d:lockdiscovery/d:activelock/d:timeout',
             '/d:prop/d:lockdiscovery/d:activelock/d:locktoken',
             '/d:prop/d:lockdiscovery/d:activelock/d:locktoken/d:href',
-        );
+        ];
 
-        foreach($elements as $elem) {
+        foreach ($elements as $elem) {
             $data = $xml->xpath($elem);
-            $this->assertEquals(1,count($data),'We expected 1 match for the xpath expression "' . $elem . '". ' . count($data) . ' were found. Full response body: ' . $this->response->body);
+            $this->assertEquals(1, count($data), 'We expected 1 match for the xpath expression "' . $elem . '". ' . count($data) . ' were found. Full response body: ' . $this->response->body);
         }
 
         $depth = $xml->xpath('/d:prop/d:lockdiscovery/d:activelock/d:depth');
-        $this->assertEquals('infinity',(string)$depth[0]);
+        $this->assertEquals('infinity', (string)$depth[0]);
 
         $token = $xml->xpath('/d:prop/d:lockdiscovery/d:activelock/d:locktoken/d:href');
-        $this->assertEquals($this->response->getHeader('Lock-Token'),'<' . (string)$token[0] . '>','Token in response body didn\'t match token in response header.');
+        $this->assertEquals($this->response->getHeader('Lock-Token'), '<' . (string)$token[0] . '>', 'Token in response body didn\'t match token in response header.');
 
     }
 
@@ -139,7 +139,7 @@ class PluginTest extends DAV\AbstractServer {
 
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
 
         $this->assertEquals(423, $this->response->status, 'Full response: ' . $this->response->body);
 
@@ -174,9 +174,9 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
 
-        $this->assertEquals(200, $this->response->status,'We received an incorrect status code. Full response body: ' . $this->response->getBody());
+        $this->assertEquals(200, $this->response->status, 'We received an incorrect status code. Full response body: ' . $this->response->getBody());
 
     }
 
@@ -209,9 +209,9 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
 
-        $this->assertEquals(423, $this->response->getStatus(),'We received an incorrect status code. Full response body: ' . $this->response->getBody());
+        $this->assertEquals(423, $this->response->getStatus(), 'We received an incorrect status code. Full response body: ' . $this->response->getBody());
 
     }
 
@@ -233,8 +233,8 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(201, $this->response->status);
 
@@ -251,7 +251,7 @@ class PluginTest extends DAV\AbstractServer {
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
+            'Content-Type'    => ['application/xml; charset=utf-8'],
             ],
             $this->response->getHeaders()
          );
@@ -271,7 +271,7 @@ class PluginTest extends DAV\AbstractServer {
 
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
+            'Content-Type'    => ['application/xml; charset=utf-8'],
             ],
             $this->response->getHeaders()
          );
@@ -298,8 +298,8 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(200, $this->response->status);
 
@@ -308,8 +308,8 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(423, $this->response->status);
 
@@ -340,10 +340,10 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpResponse = new HTTP\ResponseMock();
         $this->server->invokeMethod($request, $this->server->httpResponse);
 
-        $this->assertEquals(204,$this->server->httpResponse->status,'Got an incorrect status code. Full response body: ' . $this->response->body);
+        $this->assertEquals(204, $this->server->httpResponse->status, 'Got an incorrect status code. Full response body: ' . $this->response->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Length' => ['0'],
+            'Content-Length'  => ['0'],
             ],
             $this->server->httpResponse->getHeaders()
          );
@@ -372,17 +372,17 @@ class PluginTest extends DAV\AbstractServer {
         $lockToken = $this->server->httpResponse->getHeader('Lock-Token');
 
         // See Issue 123
-        $lockToken = trim($lockToken,'<>');
+        $lockToken = trim($lockToken, '<>');
 
         $request = new HTTP\Request('UNLOCK', '/test.txt', ['Lock-Token' => $lockToken]);
         $this->server->httpRequest = $request;
         $this->server->httpResponse = new HTTP\ResponseMock();
         $this->server->invokeMethod($request, $this->server->httpResponse);
 
-        $this->assertEquals(204, $this->server->httpResponse->status,'Got an incorrect status code. Full response body: ' . $this->response->body);
+        $this->assertEquals(204, $this->server->httpResponse->status, 'Got an incorrect status code. Full response body: ' . $this->response->body);
         $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Length' => ['0'],
+            'Content-Length'  => ['0'],
             ],
             $this->server->httpResponse->getHeaders()
          );
@@ -396,7 +396,7 @@ class PluginTest extends DAV\AbstractServer {
     function testLockRetainOwner() {
 
         $request = HTTP\Sapi::createFromServerArray([
-            'REQUEST_URI' => '/test.txt',
+            'REQUEST_URI'    => '/test.txt',
             'REQUEST_METHOD' => 'LOCK',
         ]);
         $this->server->httpRequest = $request;
@@ -412,8 +412,8 @@ class PluginTest extends DAV\AbstractServer {
         $lockToken = $this->server->httpResponse->getHeader('Lock-Token');
 
         $locks = $this->locksPlugin->getLocks('test.txt');
-        $this->assertEquals(1,count($locks));
-        $this->assertEquals('Evert',$locks[0]->owner);
+        $this->assertEquals(1, count($locks));
+        $this->assertEquals('Evert', $locks[0]->owner);
 
 
     }
@@ -423,10 +423,10 @@ class PluginTest extends DAV\AbstractServer {
      */
     function testLockPutBadToken() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/test.txt',
             'REQUEST_METHOD' => 'LOCK',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -441,24 +441,24 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/test.txt',
             'REQUEST_METHOD' => 'PUT',
-            'HTTP_IF' => '(<opaquelocktoken:token1>)',
-        );
+            'HTTP_IF'        => '(<opaquelocktoken:token1>)',
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('newbody');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         // $this->assertEquals('412 Precondition failed',$this->response->status);
         $this->assertEquals(423, $this->response->status);
@@ -470,10 +470,10 @@ class PluginTest extends DAV\AbstractServer {
      */
     function testLockDeleteParent() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/dir/child.txt',
             'REQUEST_METHOD' => 'LOCK',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -488,22 +488,22 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/dir',
             'REQUEST_METHOD' => 'DELETE',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals(423, $this->response->status);
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
 
     }
     /**
@@ -511,10 +511,10 @@ class PluginTest extends DAV\AbstractServer {
      */
     function testLockDeleteSucceed() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/dir/child.txt',
             'REQUEST_METHOD' => 'LOCK',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -529,23 +529,23 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/dir/child.txt',
             'REQUEST_METHOD' => 'DELETE',
-            'HTTP_IF' => '(' . $this->response->getHeader('Lock-Token') . ')',
-        );
+            'HTTP_IF'        => '(' . $this->response->getHeader('Lock-Token') . ')',
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
         $this->assertEquals(204, $this->response->status);
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
 
     }
 
@@ -554,10 +554,10 @@ class PluginTest extends DAV\AbstractServer {
      */
     function testLockCopyLockSource() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/dir/child.txt',
             'REQUEST_METHOD' => 'LOCK',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -572,23 +572,23 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = array(
-            'REQUEST_URI'    => '/dir/child.txt',
-            'REQUEST_METHOD' => 'COPY',
+        $serverVars = [
+            'REQUEST_URI'      => '/dir/child.txt',
+            'REQUEST_METHOD'   => 'COPY',
             'HTTP_DESTINATION' => '/dir/child2.txt',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(201, $this->response->status,'Copy must succeed if only the source is locked, but not the destination');
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
+        $this->assertEquals(201, $this->response->status, 'Copy must succeed if only the source is locked, but not the destination');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
 
     }
     /**
@@ -596,10 +596,10 @@ class PluginTest extends DAV\AbstractServer {
      */
     function testLockCopyLockDestination() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/dir/child2.txt',
             'REQUEST_METHOD' => 'LOCK',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -614,23 +614,23 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(201, $this->response->status);
 
-        $serverVars = array(
-            'REQUEST_URI'    => '/dir/child.txt',
-            'REQUEST_METHOD' => 'COPY',
+        $serverVars = [
+            'REQUEST_URI'      => '/dir/child.txt',
+            'REQUEST_METHOD'   => 'COPY',
             'HTTP_DESTINATION' => '/dir/child2.txt',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(423, $this->response->status,'Copy must succeed if only the source is locked, but not the destination');
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
+        $this->assertEquals(423, $this->response->status, 'Copy must succeed if only the source is locked, but not the destination');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
 
     }
 
@@ -639,10 +639,10 @@ class PluginTest extends DAV\AbstractServer {
      */
     function testLockMoveLockSourceLocked() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/dir/child.txt',
             'REQUEST_METHOD' => 'LOCK',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -657,23 +657,23 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = array(
-            'REQUEST_URI'    => '/dir/child.txt',
-            'REQUEST_METHOD' => 'MOVE',
+        $serverVars = [
+            'REQUEST_URI'      => '/dir/child.txt',
+            'REQUEST_METHOD'   => 'MOVE',
             'HTTP_DESTINATION' => '/dir/child2.txt',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(423, $this->response->status,'Copy must succeed if only the source is locked, but not the destination');
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
+        $this->assertEquals(423, $this->response->status, 'Copy must succeed if only the source is locked, but not the destination');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
 
     }
 
@@ -682,10 +682,10 @@ class PluginTest extends DAV\AbstractServer {
      */
     function testLockMoveLockSourceSucceed() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/dir/child.txt',
             'REQUEST_METHOD' => 'LOCK',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -700,23 +700,23 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = array(
-            'REQUEST_URI'    => '/dir/child.txt',
-            'REQUEST_METHOD' => 'MOVE',
+        $serverVars = [
+            'REQUEST_URI'      => '/dir/child.txt',
+            'REQUEST_METHOD'   => 'MOVE',
             'HTTP_DESTINATION' => '/dir/child2.txt',
-            'HTTP_IF' => '(' . $this->response->getHeader('Lock-Token') . ')',
-        );
+            'HTTP_IF'          => '(' . $this->response->getHeader('Lock-Token') . ')',
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(201, $this->response->status,'A valid lock-token was provided for the source, so this MOVE operation must succeed. Full response body: ' . $this->response->body);
+        $this->assertEquals(201, $this->response->status, 'A valid lock-token was provided for the source, so this MOVE operation must succeed. Full response body: ' . $this->response->body);
 
     }
 
@@ -725,10 +725,10 @@ class PluginTest extends DAV\AbstractServer {
      */
     function testLockMoveLockDestination() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/dir/child2.txt',
             'REQUEST_METHOD' => 'LOCK',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -743,23 +743,23 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(201, $this->response->status);
 
-        $serverVars = array(
-            'REQUEST_URI'    => '/dir/child.txt',
-            'REQUEST_METHOD' => 'MOVE',
+        $serverVars = [
+            'REQUEST_URI'      => '/dir/child.txt',
+            'REQUEST_METHOD'   => 'MOVE',
             'HTTP_DESTINATION' => '/dir/child2.txt',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(423, $this->response->status,'Copy must succeed if only the source is locked, but not the destination');
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
+        $this->assertEquals(423, $this->response->status, 'Copy must succeed if only the source is locked, but not the destination');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
 
     }
     /**
@@ -767,11 +767,11 @@ class PluginTest extends DAV\AbstractServer {
      */
     function testLockMoveLockParent() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/dir',
             'REQUEST_METHOD' => 'LOCK',
-            'HTTP_DEPTH' => 'infinite',
-        );
+            'HTTP_DEPTH'     => 'infinite',
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -786,24 +786,24 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
-        $this->assertEquals(200,$this->response->status);
+        $this->assertEquals(200, $this->response->status);
 
-        $serverVars = array(
-            'REQUEST_URI'    => '/dir/child.txt',
-            'REQUEST_METHOD' => 'MOVE',
+        $serverVars = [
+            'REQUEST_URI'      => '/dir/child.txt',
+            'REQUEST_METHOD'   => 'MOVE',
             'HTTP_DESTINATION' => '/dir/child2.txt',
-            'HTTP_IF' => '</dir> (' . $this->response->getHeader('Lock-Token') . ')',
-        );
+            'HTTP_IF'          => '</dir> (' . $this->response->getHeader('Lock-Token') . ')',
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(201, $this->response->status,'We locked the parent of both the source and destination, but the move didn\'t succeed.');
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
+        $this->assertEquals(201, $this->response->status, 'We locked the parent of both the source and destination, but the move didn\'t succeed.');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
 
     }
 
@@ -812,10 +812,10 @@ class PluginTest extends DAV\AbstractServer {
      */
     function testLockPutGoodToken() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/test.txt',
             'REQUEST_METHOD' => 'LOCK',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -830,24 +830,24 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(200, $this->response->status);
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/test.txt',
             'REQUEST_METHOD' => 'PUT',
-            'HTTP_IF' => '('.$this->response->getHeader('Lock-Token').')',
-        );
+            'HTTP_IF'        => '(' . $this->response->getHeader('Lock-Token') . ')',
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('newbody');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(204, $this->response->status);
 
@@ -871,22 +871,22 @@ class PluginTest extends DAV\AbstractServer {
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(201, $this->response->getStatus());
 
         $request = new HTTP\Request(
             'PUT',
             '/test.txt',
-            ['If' => '</unrelated.txt> ('.$this->response->getHeader('Lock-Token').')']
+            ['If' => '</unrelated.txt> (' . $this->response->getHeader('Lock-Token') . ')']
         );
         $request->setBody('newbody');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
 
         $this->assertEquals(204, $this->response->status);
 
@@ -894,11 +894,11 @@ class PluginTest extends DAV\AbstractServer {
 
     function testPutWithIncorrectETag() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/test.txt',
             'REQUEST_METHOD' => 'PUT',
-            'HTTP_IF' => '(["etag1"])',
-        );
+            'HTTP_IF'        => '(["etag1"])',
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('newbody');
@@ -920,14 +920,14 @@ class PluginTest extends DAV\AbstractServer {
         $filename = SABRE_TEMPDIR . '/test.txt';
         $etag = sha1(
             fileinode($filename) .
-            filesize($filename ) .
+            filesize($filename) .
             filemtime($filename)
         );
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/test.txt',
             'REQUEST_METHOD' => 'PUT',
-            'HTTP_IF' => '(["'.$etag.'"])',
-        );
+            'HTTP_IF'        => '(["' . $etag . '"])',
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('newbody');
@@ -939,11 +939,11 @@ class PluginTest extends DAV\AbstractServer {
 
     function testDeleteWithETagOnCollection() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/dir',
             'REQUEST_METHOD' => 'DELETE',
-            'HTTP_IF' => '(["etag1"])',
-        );
+            'HTTP_IF'        => '(["etag1"])',
+        ];
         $request = HTTP\Sapi::createFromServerArray($serverVars);
 
         $this->server->httpRequest = $request;
@@ -954,9 +954,9 @@ class PluginTest extends DAV\AbstractServer {
 
     function testGetTimeoutHeader() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'HTTP_TIMEOUT' => 'second-100',
-        ));
+        ]);
 
         $this->server->httpRequest = $request;
         $this->assertEquals(100, $this->locksPlugin->getTimeoutHeader());
@@ -965,9 +965,9 @@ class PluginTest extends DAV\AbstractServer {
 
     function testGetTimeoutHeaderTwoItems() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'HTTP_TIMEOUT' => 'second-5, infinite',
-        ));
+        ]);
 
         $this->server->httpRequest = $request;
         $this->assertEquals(5, $this->locksPlugin->getTimeoutHeader());
@@ -976,9 +976,9 @@ class PluginTest extends DAV\AbstractServer {
 
     function testGetTimeoutHeaderInfinite() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'HTTP_TIMEOUT' => 'infinite, second-5',
-        ));
+        ]);
 
         $this->server->httpRequest = $request;
         $this->assertEquals(LockInfo::TIMEOUT_INFINITE, $this->locksPlugin->getTimeoutHeader());
@@ -990,9 +990,9 @@ class PluginTest extends DAV\AbstractServer {
      */
     function testGetTimeoutHeaderInvalid() {
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'HTTP_TIMEOUT' => 'yourmom',
-        ));
+        ]);
 
         $this->server->httpRequest = $request;
         $this->locksPlugin->getTimeoutHeader();
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/Mount/PluginTest.php b/vendor/sabre/dav/tests/Sabre/DAV/Mount/PluginTest.php
index e6415792c..3213fcb1b 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/Mount/PluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/Mount/PluginTest.php
@@ -18,27 +18,27 @@ class PluginTest extends DAV\AbstractServer {
 
     function testPassThrough() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/',
             'REQUEST_METHOD' => 'GET',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(501, $this->response->status,'We expected GET to not be implemented for Directories. Response body: ' . $this->response->body);
+        $this->assertEquals(501, $this->response->status, 'We expected GET to not be implemented for Directories. Response body: ' . $this->response->body);
 
     }
 
     function testMountResponse() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/?mount',
             'REQUEST_METHOD' => 'GET',
             'QUERY_STRING'   => 'mount',
             'HTTP_HOST'      => 'example.org',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->httpRequest = ($request);
@@ -47,11 +47,11 @@ class PluginTest extends DAV\AbstractServer {
         $this->assertEquals(200, $this->response->status);
 
         $xml = simplexml_load_string($this->response->body);
-        $this->assertInstanceOf('SimpleXMLElement',$xml, 'Response was not a valid xml document. The list of errors:' . print_r(libxml_get_errors(),true) . '. xml body: ' . $this->response->body . '. What type we got: ' . gettype($xml) . ' class, if object: ' . get_class($xml));
+        $this->assertInstanceOf('SimpleXMLElement', $xml, 'Response was not a valid xml document. The list of errors:' . print_r(libxml_get_errors(), true) . '. xml body: ' . $this->response->body . '. What type we got: ' . gettype($xml) . ' class, if object: ' . get_class($xml));
 
-        $xml->registerXPathNamespace('dm','http://purl.org/NET/webdav/mount');
+        $xml->registerXPathNamespace('dm', 'http://purl.org/NET/webdav/mount');
         $url = $xml->xpath('//dm:url');
-        $this->assertEquals('http://example.org/',(string)$url[0]);
+        $this->assertEquals('http://example.org/', (string)$url[0]);
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ObjectTreeTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ObjectTreeTest.php
index 9b7eeb90c..15289ce52 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ObjectTreeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ObjectTreeTest.php
@@ -13,8 +13,8 @@ class ObjectTreeTest extends \PHPUnit_Framework_TestCase {
         \Sabre\TestUtil::clearTempDir();
         mkdir(SABRE_TEMPDIR . '/root');
         mkdir(SABRE_TEMPDIR . '/root/subdir');
-        file_put_contents(SABRE_TEMPDIR . '/root/file.txt','contents');
-        file_put_contents(SABRE_TEMPDIR . '/root/subdir/subfile.txt','subcontents');
+        file_put_contents(SABRE_TEMPDIR . '/root/file.txt', 'contents');
+        file_put_contents(SABRE_TEMPDIR . '/root/subdir/subfile.txt', 'subcontents');
         $rootNode = new FSExt\Directory(SABRE_TEMPDIR . '/root');
         $this->tree = new Tree($rootNode);
 
@@ -29,22 +29,22 @@ class ObjectTreeTest extends \PHPUnit_Framework_TestCase {
     function testGetRootNode() {
 
         $root = $this->tree->getNodeForPath('');
-        $this->assertInstanceOf('Sabre\\DAV\\FSExt\\Directory',$root);
+        $this->assertInstanceOf('Sabre\\DAV\\FSExt\\Directory', $root);
 
     }
 
     function testGetSubDir() {
 
         $root = $this->tree->getNodeForPath('subdir');
-        $this->assertInstanceOf('Sabre\\DAV\\FSExt\\Directory',$root);
+        $this->assertInstanceOf('Sabre\\DAV\\FSExt\\Directory', $root);
 
     }
 
     function testCopyFile() {
 
-       $this->tree->copy('file.txt','file2.txt');
-       $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/file2.txt'));
-       $this->assertEquals('contents',file_get_contents(SABRE_TEMPDIR.'/root/file2.txt'));
+       $this->tree->copy('file.txt', 'file2.txt');
+       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/file2.txt'));
+       $this->assertEquals('contents', file_get_contents(SABRE_TEMPDIR . '/root/file2.txt'));
 
     }
 
@@ -53,10 +53,10 @@ class ObjectTreeTest extends \PHPUnit_Framework_TestCase {
      */
     function testCopyDirectory() {
 
-       $this->tree->copy('subdir','subdir2');
-       $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/subdir2'));
-       $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/subdir2/subfile.txt'));
-       $this->assertEquals('subcontents',file_get_contents(SABRE_TEMPDIR.'/root/subdir2/subfile.txt'));
+       $this->tree->copy('subdir', 'subdir2');
+       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/subdir2'));
+       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/subdir2/subfile.txt'));
+       $this->assertEquals('subcontents', file_get_contents(SABRE_TEMPDIR . '/root/subdir2/subfile.txt'));
 
     }
 
@@ -65,10 +65,10 @@ class ObjectTreeTest extends \PHPUnit_Framework_TestCase {
      */
     function testMoveFile() {
 
-       $this->tree->move('file.txt','file2.txt');
-       $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/file2.txt'));
-       $this->assertFalse(file_exists(SABRE_TEMPDIR.'/root/file.txt'));
-       $this->assertEquals('contents',file_get_contents(SABRE_TEMPDIR.'/root/file2.txt'));
+       $this->tree->move('file.txt', 'file2.txt');
+       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/file2.txt'));
+       $this->assertFalse(file_exists(SABRE_TEMPDIR . '/root/file.txt'));
+       $this->assertEquals('contents', file_get_contents(SABRE_TEMPDIR . '/root/file2.txt'));
 
     }
 
@@ -77,10 +77,10 @@ class ObjectTreeTest extends \PHPUnit_Framework_TestCase {
      */
     function testMoveFileNewParent() {
 
-       $this->tree->move('file.txt','subdir/file2.txt');
-       $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/subdir/file2.txt'));
-       $this->assertFalse(file_exists(SABRE_TEMPDIR.'/root/file.txt'));
-       $this->assertEquals('contents',file_get_contents(SABRE_TEMPDIR.'/root/subdir/file2.txt'));
+       $this->tree->move('file.txt', 'subdir/file2.txt');
+       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/subdir/file2.txt'));
+       $this->assertFalse(file_exists(SABRE_TEMPDIR . '/root/file.txt'));
+       $this->assertEquals('contents', file_get_contents(SABRE_TEMPDIR . '/root/subdir/file2.txt'));
 
     }
 
@@ -89,11 +89,11 @@ class ObjectTreeTest extends \PHPUnit_Framework_TestCase {
      */
     function testMoveDirectory() {
 
-       $this->tree->move('subdir','subdir2');
-       $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/subdir2'));
-       $this->assertTrue(file_exists(SABRE_TEMPDIR.'/root/subdir2/subfile.txt'));
-       $this->assertFalse(file_exists(SABRE_TEMPDIR.'/root/subdir'));
-       $this->assertEquals('subcontents',file_get_contents(SABRE_TEMPDIR.'/root/subdir2/subfile.txt'));
+       $this->tree->move('subdir', 'subdir2');
+       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/subdir2'));
+       $this->assertTrue(file_exists(SABRE_TEMPDIR . '/root/subdir2/subfile.txt'));
+       $this->assertFalse(file_exists(SABRE_TEMPDIR . '/root/subdir'));
+       $this->assertEquals('subcontents', file_get_contents(SABRE_TEMPDIR . '/root/subdir2/subfile.txt'));
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/FileMock.php b/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/FileMock.php
index d6cc406be..eff1e7d67 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/FileMock.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/FileMock.php
@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\DAV\PartialUpdate;
+
 use Sabre\DAV;
 
 class FileMock implements IPatchSupport {
@@ -49,10 +50,10 @@ class FileMock implements IPatchSupport {
             $data = stream_get_contents($data);
         }
 
-        switch($rangeType) {
+        switch ($rangeType) {
 
             case 1 :
-                $this->data.=$data;
+                $this->data .= $data;
                 break;
             case 3 :
                 // Turn the offset into an offset-offset.
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/SpecificationTest.php b/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/SpecificationTest.php
index 31be2a1b1..ca8ca3f6e 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/SpecificationTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/PartialUpdate/SpecificationTest.php
@@ -16,11 +16,11 @@ class SpecificationTest extends \PHPUnit_Framework_TestCase {
 
     protected $server;
 
-    public function setUp() {
+    function setUp() {
 
-        $tree = array(
+        $tree = [
             new File(SABRE_TEMPDIR . '/foobar.txt')
-        );
+        ];
         $server = new Server($tree);
         $server->debugExceptions = true;
         $server->addPlugin(new Plugin());
@@ -31,7 +31,7 @@ class SpecificationTest extends \PHPUnit_Framework_TestCase {
 
     }
 
-    public function tearDown() {
+    function tearDown() {
 
         \Sabre\TestUtil::clearTempDir();
 
@@ -40,10 +40,10 @@ class SpecificationTest extends \PHPUnit_Framework_TestCase {
     /**
      * @dataProvider data
      */
-    public function testUpdateRange($headerValue, $httpStatus, $endResult, $contentLength = 4) {
+    function testUpdateRange($headerValue, $httpStatus, $endResult, $contentLength = 4) {
 
         $headers = [
-            'Content-Type' => 'application/x-sabredav-partialupdate',
+            'Content-Type'   => 'application/x-sabredav-partialupdate',
             'X-Update-Range' => $headerValue,
         ];
 
@@ -64,25 +64,25 @@ class SpecificationTest extends \PHPUnit_Framework_TestCase {
             $this->assertEquals($endResult, file_get_contents(SABRE_TEMPDIR . '/foobar.txt'));
         }
 
-    } 
+    }
 
-    public function data() {
+    function data() {
 
-        return array(
+        return [
             // Problems
-            array('foo',       400, null),
-            array('bytes=0-3', 411, null, 0),
-            array('bytes=4-1', 416, null),
-
-            array('bytes=0-3', 204, '----567890'),
-            array('bytes=1-4', 204, '1----67890'),
-            array('bytes=0-',  204, '----567890'),
-            array('bytes=-4',  204, '123456----'),
-            array('bytes=-2',  204, '12345678----'),
-            array('bytes=2-',  204, '12----7890'),
-            array('append',    204, '1234567890----'),
-
-        );
+            ['foo',       400, null],
+            ['bytes=0-3', 411, null, 0],
+            ['bytes=4-1', 416, null],
+
+            ['bytes=0-3', 204, '----567890'],
+            ['bytes=1-4', 204, '1----67890'],
+            ['bytes=0-',  204, '----567890'],
+            ['bytes=-4',  204, '123456----'],
+            ['bytes=-2',  204, '12345678----'],
+            ['bytes=2-',  204, '12----7890'],
+            ['append',    204, '1234567890----'],
+
+        ];
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerEventsTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerEventsTest.php
index 6ac20d2da..4c576f108 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerEventsTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerEventsTest.php
@@ -31,7 +31,9 @@ class ServerEventsTest extends AbstractServer {
 
     function testAfterResponse() {
 
-        $mock = $this->getMock('stdClass', ['afterResponseCallback']);
+        $mock = $this->getMockBuilder('stdClass')
+            ->setMethods(['afterResponseCallback'])
+            ->getMock();
         $mock->expects($this->once())->method('afterResponseCallback');
 
         $this->server->on('afterResponse', [$mock, 'afterResponseCallback']);
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerMKCOLTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerMKCOLTest.php
index e35189ec3..557eddbbc 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerMKCOLTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerMKCOLTest.php
@@ -8,20 +8,20 @@ class ServerMKCOLTest extends AbstractServer {
 
     function testMkcol() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/testcol',
             'REQUEST_METHOD' => 'MKCOL',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody("");
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Length' => ['0'],
-        ),$this->response->getHeaders());
+            'Content-Length'  => ['0'],
+        ], $this->response->getHeaders());
 
         $this->assertEquals(201, $this->response->status);
         $this->assertEquals('', $this->response->body);
@@ -34,20 +34,20 @@ class ServerMKCOLTest extends AbstractServer {
      */
     function testMKCOLUnknownBody() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/testcol',
             'REQUEST_METHOD' => 'MKCOL',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody("Hello");
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ),$this->response->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $this->response->getHeaders());
 
         $this->assertEquals(415, $this->response->status);
 
@@ -58,23 +58,23 @@ class ServerMKCOLTest extends AbstractServer {
      */
     function testMKCOLBrokenXML() {
 
-        $serverVars = array(
-            'REQUEST_URI'    => '/testcol',
-            'REQUEST_METHOD' => 'MKCOL',
+        $serverVars = [
+            'REQUEST_URI'       => '/testcol',
+            'REQUEST_METHOD'    => 'MKCOL',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody("Hello");
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ),$this->response->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $this->response->getHeaders());
 
-        $this->assertEquals(400, $this->response->getStatus(), $this->response->getBodyAsString() );
+        $this->assertEquals(400, $this->response->getStatus(), $this->response->getBodyAsString());
 
     }
 
@@ -83,21 +83,21 @@ class ServerMKCOLTest extends AbstractServer {
      */
     function testMKCOLUnknownXML() {
 
-        $serverVars = array(
-            'REQUEST_URI'    => '/testcol',
-            'REQUEST_METHOD' => 'MKCOL',
+        $serverVars = [
+            'REQUEST_URI'       => '/testcol',
+            'REQUEST_METHOD'    => 'MKCOL',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?><html></html>');
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ),$this->response->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $this->response->getHeaders());
 
         $this->assertEquals(400, $this->response->getStatus());
 
@@ -108,11 +108,11 @@ class ServerMKCOLTest extends AbstractServer {
      */
     function testMKCOLNoResourceType() {
 
-        $serverVars = array(
-            'REQUEST_URI'    => '/testcol',
-            'REQUEST_METHOD' => 'MKCOL',
+        $serverVars = [
+            'REQUEST_URI'       => '/testcol',
+            'REQUEST_METHOD'    => 'MKCOL',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -126,12 +126,12 @@ class ServerMKCOLTest extends AbstractServer {
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ),$this->response->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $this->response->getHeaders());
 
-        $this->assertEquals(400, $this->response->status, 'Wrong statuscode received. Full response body: ' .$this->response->body);
+        $this->assertEquals(400, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
 
     }
 
@@ -140,11 +140,11 @@ class ServerMKCOLTest extends AbstractServer {
      */
     function testMKCOLIncorrectResourceType() {
 
-        $serverVars = array(
-            'REQUEST_URI'    => '/testcol',
-            'REQUEST_METHOD' => 'MKCOL',
+        $serverVars = [
+            'REQUEST_URI'       => '/testcol',
+            'REQUEST_METHOD'    => 'MKCOL',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -158,12 +158,12 @@ class ServerMKCOLTest extends AbstractServer {
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ),$this->response->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $this->response->getHeaders());
 
-        $this->assertEquals(403, $this->response->status, 'Wrong statuscode received. Full response body: ' .$this->response->body);
+        $this->assertEquals(403, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
 
     }
 
@@ -172,11 +172,11 @@ class ServerMKCOLTest extends AbstractServer {
      */
     function testMKCOLSuccess() {
 
-        $serverVars = array(
-            'REQUEST_URI'    => '/testcol',
-            'REQUEST_METHOD' => 'MKCOL',
+        $serverVars = [
+            'REQUEST_URI'       => '/testcol',
+            'REQUEST_METHOD'    => 'MKCOL',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -190,12 +190,12 @@ class ServerMKCOLTest extends AbstractServer {
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Length' => ['0'],
-        ),$this->response->getHeaders());
+            'Content-Length'  => ['0'],
+        ], $this->response->getHeaders());
 
-        $this->assertEquals(201, $this->response->status, 'Wrong statuscode received. Full response body: ' .$this->response->body);
+        $this->assertEquals(201, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
 
     }
 
@@ -204,11 +204,11 @@ class ServerMKCOLTest extends AbstractServer {
      */
     function testMKCOLWhiteSpaceResourceType() {
 
-        $serverVars = array(
-            'REQUEST_URI'    => '/testcol',
-            'REQUEST_METHOD' => 'MKCOL',
+        $serverVars = [
+            'REQUEST_URI'       => '/testcol',
+            'REQUEST_METHOD'    => 'MKCOL',
             'HTTP_CONTENT_TYPE' => 'application/xml',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
@@ -224,12 +224,12 @@ class ServerMKCOLTest extends AbstractServer {
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Length' => ['0'],
-        ),$this->response->getHeaders());
+            'Content-Length'  => ['0'],
+        ], $this->response->getHeaders());
 
-        $this->assertEquals(201, $this->response->status, 'Wrong statuscode received. Full response body: ' .$this->response->body);
+        $this->assertEquals(201, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
 
     }
 
@@ -238,10 +238,10 @@ class ServerMKCOLTest extends AbstractServer {
      */
     function testMKCOLNoParent() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/testnoparent/409me',
             'REQUEST_METHOD' => 'MKCOL',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('');
@@ -249,12 +249,12 @@ class ServerMKCOLTest extends AbstractServer {
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ),$this->response->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $this->response->getHeaders());
 
-        $this->assertEquals(409, $this->response->status, 'Wrong statuscode received. Full response body: ' .$this->response->body);
+        $this->assertEquals(409, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
 
     }
 
@@ -263,10 +263,10 @@ class ServerMKCOLTest extends AbstractServer {
      */
     function testMKCOLParentIsNoCollection() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/test.txt/409me',
             'REQUEST_METHOD' => 'MKCOL',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('');
@@ -274,12 +274,12 @@ class ServerMKCOLTest extends AbstractServer {
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ),$this->response->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $this->response->getHeaders());
 
-        $this->assertEquals(409, $this->response->status, 'Wrong statuscode received. Full response body: ' .$this->response->body);
+        $this->assertEquals(409, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
 
     }
 
@@ -288,10 +288,10 @@ class ServerMKCOLTest extends AbstractServer {
      */
     function testMKCOLAlreadyExists() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/test.txt',
             'REQUEST_METHOD' => 'MKCOL',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('');
@@ -299,13 +299,13 @@ class ServerMKCOLTest extends AbstractServer {
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-            'Allow'        => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT'],
-        ),$this->response->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Allow'           => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT'],
+        ], $this->response->getHeaders());
 
-        $this->assertEquals(405, $this->response->status, 'Wrong statuscode received. Full response body: ' .$this->response->body);
+        $this->assertEquals(405, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
 
     }
 
@@ -315,13 +315,11 @@ class ServerMKCOLTest extends AbstractServer {
      */
     function testMKCOLAndProps() {
 
-        $serverVars = array(
-            'REQUEST_URI'    => '/testcol',
-            'REQUEST_METHOD' => 'MKCOL',
-            'HTTP_CONTENT_TYPE' => 'application/xml',
+        $request = new HTTP\Request(
+            'MKCOL',
+            '/testcol',
+            ['Content-Type' => 'application/xml']
         );
-
-        $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody('<?xml version="1.0"?>
 <mkcol xmlns="DAV:">
   <set>
@@ -334,12 +332,34 @@ class ServerMKCOLTest extends AbstractServer {
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(207, $this->response->status, 'Wrong statuscode received. Full response body: ' .$this->response->body);
+        $this->assertEquals(207, $this->response->status, 'Wrong statuscode received. Full response body: ' . $this->response->body);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ),$this->response->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $this->response->getHeaders());
+
+        $responseBody = $this->response->getBodyAsString();
+
+        $expected = <<<XML
+<?xml version="1.0"?>
+<d:multistatus xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns">
+ <d:response>
+  <d:href>/testcol</d:href>
+  <d:propstat>
+   <d:prop>
+    <d:displayname />
+   </d:prop>
+   <d:status>HTTP/1.1 403 Forbidden</d:status>
+  </d:propstat>
+ </d:response>
+</d:multistatus>
+XML;
+
+        $this->assertXmlStringEqualsXmlString(
+            $expected,
+            $responseBody
+        );
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerPluginTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerPluginTest.php
index ab0ad295e..fa67102cc 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerPluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerPluginTest.php
@@ -1,6 +1,7 @@
 <?php
 
 namespace Sabre\DAV;
+
 use Sabre\HTTP;
 
 require_once 'Sabre/DAV/AbstractServer.php';
@@ -28,13 +29,13 @@ class ServerPluginTest extends AbstractServer {
     function testBaseClass() {
 
         $p = new ServerPluginMock();
-        $this->assertEquals([],$p->getFeatures());
-        $this->assertEquals([],$p->getHTTPMethods(''));
+        $this->assertEquals([], $p->getFeatures());
+        $this->assertEquals([], $p->getHTTPMethods(''));
         $this->assertEquals(
             [
-                'name' => 'Sabre\DAV\ServerPluginMock',
+                'name'        => 'Sabre\DAV\ServerPluginMock',
                 'description' => null,
-                'link' => null
+                'link'        => null
             ], $p->getPluginInfo()
         );
 
@@ -42,34 +43,34 @@ class ServerPluginTest extends AbstractServer {
 
     function testOptions() {
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_URI'    => '/',
             'REQUEST_METHOD' => 'OPTIONS',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             'DAV'             => ['1, 3, extended-mkcol, drinking'],
             'MS-Author-Via'   => ['DAV'],
             'Allow'           => ['OPTIONS, GET, HEAD, DELETE, PROPFIND, PUT, PROPPATCH, COPY, MOVE, REPORT, BEER, WINE'],
             'Accept-Ranges'   => ['bytes'],
             'Content-Length'  => ['0'],
             'X-Sabre-Version' => [Version::VERSION],
-        ),$this->response->getHeaders());
+        ], $this->response->getHeaders());
 
         $this->assertEquals(200, $this->response->status);
         $this->assertEquals('', $this->response->body);
-        $this->assertEquals('OPTIONS',$this->testPlugin->beforeMethod);
+        $this->assertEquals('OPTIONS', $this->testPlugin->beforeMethod);
 
 
     }
 
     function testGetPlugin() {
 
-        $this->assertEquals($this->testPlugin,$this->server->getPlugin(get_class($this->testPlugin)));
+        $this->assertEquals($this->testPlugin, $this->server->getPlugin(get_class($this->testPlugin)));
 
     }
 
@@ -81,17 +82,17 @@ class ServerPluginTest extends AbstractServer {
 
     function testGetSupportedReportSet() {
 
-        $this->assertEquals(array(), $this->testPlugin->getSupportedReportSet('/'));
+        $this->assertEquals([], $this->testPlugin->getSupportedReportSet('/'));
 
     }
 
     function testGetPlugins() {
 
         $this->assertEquals(
-            array(
+            [
                 get_class($this->testPlugin) => $this->testPlugin,
-                'core' => $this->server->getPlugin('core'),
-            ),
+                'core'                       => $this->server->getPlugin('core'),
+            ],
             $this->server->getPlugins()
         );
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerPreconditionTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerPreconditionTest.php
index 1dc8d8a37..203cf26d9 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerPreconditionTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerPreconditionTest.php
@@ -13,7 +13,7 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
      */
     function testIfMatchNoNode() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/bar', ['If-Match' => '*']);
         $httpResponse = new HTTP\Response();
@@ -25,7 +25,7 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
      */
     function testIfMatchHasNode() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/foo', ['If-Match' => '*']);
         $httpResponse = new HTTP\Response();
@@ -38,7 +38,7 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
      */
     function testIfMatchWrongEtag() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/foo', ['If-Match' => '1234']);
         $httpResponse = new HTTP\Response();
@@ -50,7 +50,7 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
      */
     function testIfMatchCorrectEtag() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/foo', ['If-Match' => '"abc123"']);
         $httpResponse = new HTTP\Response();
@@ -65,7 +65,7 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
      */
     function testIfMatchEvolutionEtag() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/foo', ['If-Match' => '\\"abc123\\"']);
         $httpResponse = new HTTP\Response();
@@ -77,7 +77,7 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
      */
     function testIfMatchMultiple() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/foo', ['If-Match' => '"hellothere", "abc123"']);
         $httpResponse = new HTTP\Response();
@@ -89,7 +89,7 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
      */
     function testIfNoneMatchNoNode() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/bar', ['If-None-Match' => '*']);
         $httpResponse = new HTTP\Response();
@@ -102,7 +102,7 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
      */
     function testIfNoneMatchHasNode() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('POST', '/foo', ['If-None-Match' => '*']);
         $httpResponse = new HTTP\Response();
@@ -114,7 +114,7 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
      */
     function testIfNoneMatchWrongEtag() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('POST', '/foo', ['If-None-Match' => '"1234"']);
         $httpResponse = new HTTP\Response();
@@ -126,7 +126,7 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
      */
     function testIfNoneMatchWrongEtagMultiple() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('POST', '/foo', ['If-None-Match' => '"1234", "5678"']);
         $httpResponse = new HTTP\Response();
@@ -137,9 +137,9 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
     /**
      * @expectedException Sabre\DAV\Exception\PreconditionFailed
      */
-    public function testIfNoneMatchCorrectEtag() {
+    function testIfNoneMatchCorrectEtag() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('POST', '/foo', ['If-None-Match' => '"abc123"']);
         $httpResponse = new HTTP\Response();
@@ -150,9 +150,9 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
     /**
      * @expectedException Sabre\DAV\Exception\PreconditionFailed
      */
-    public function testIfNoneMatchCorrectEtagMultiple() {
+    function testIfNoneMatchCorrectEtagMultiple() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('POST', '/foo', ['If-None-Match' => '"1234, "abc123"']);
         $httpResponse = new HTTP\Response();
@@ -162,9 +162,9 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
 
     /**
      */
-    public function testIfNoneMatchCorrectEtagAsGet() {
+    function testIfNoneMatchCorrectEtagAsGet() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $httpRequest = new HTTP\Request('GET', '/foo', ['If-None-Match' => '"abc123"']);
         $server->httpResponse = new HTTP\ResponseMock();
@@ -178,9 +178,9 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
     /**
      * This was a test written for issue #515.
      */
-    public function testNoneMatchCorrectEtagEnsureSapiSent() {
+    function testNoneMatchCorrectEtagEnsureSapiSent() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
         $server->sapi = new HTTP\SapiMock();
         HTTP\SapiMock::$sent = 0;
@@ -193,7 +193,7 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
         $this->assertFalse($server->checkPreconditions($httpRequest, $server->httpResponse));
         $this->assertEquals(304, $server->httpResponse->getStatus());
         $this->assertEquals([
-            'ETag' => ['"abc123"'],
+            'ETag'            => ['"abc123"'],
             'X-Sabre-Version' => [Version::VERSION],
         ], $server->httpResponse->getHeaders());
         $this->assertEquals(1, HTTP\SapiMock::$sent);
@@ -202,35 +202,35 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
 
     /**
      */
-    public function testIfModifiedSinceUnModified() {
+    function testIfModifiedSinceUnModified() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray(array(
+        $httpRequest = HTTP\Sapi::createFromServerArray([
             'HTTP_IF_MODIFIED_SINCE' => 'Sun, 06 Nov 1994 08:49:37 GMT',
-            'REQUEST_URI'   => '/foo'
-        ));
+            'REQUEST_URI'            => '/foo'
+        ]);
         $server->httpResponse = new HTTP\ResponseMock();
         $this->assertFalse($server->checkPreconditions($httpRequest, $server->httpResponse));
 
         $this->assertEquals(304, $server->httpResponse->status);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'Last-Modified' => ['Sat, 06 Apr 1985 23:30:00 GMT'],
-        ), $server->httpResponse->getHeaders());
+        ], $server->httpResponse->getHeaders());
 
     }
 
 
     /**
      */
-    public function testIfModifiedSinceModified() {
+    function testIfModifiedSinceModified() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray(array(
+        $httpRequest = HTTP\Sapi::createFromServerArray([
             'HTTP_IF_MODIFIED_SINCE' => 'Tue, 06 Nov 1984 08:49:37 GMT',
-            'REQUEST_URI'   => '/foo'
-        ));
+            'REQUEST_URI'            => '/foo'
+        ]);
 
         $httpResponse = new HTTP\ResponseMock();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
@@ -239,14 +239,14 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
 
     /**
      */
-    public function testIfModifiedSinceInvalidDate() {
+    function testIfModifiedSinceInvalidDate() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray(array(
+        $httpRequest = HTTP\Sapi::createFromServerArray([
             'HTTP_IF_MODIFIED_SINCE' => 'Your mother',
-            'REQUEST_URI'   => '/foo'
-        ));
+            'REQUEST_URI'            => '/foo'
+        ]);
         $httpResponse = new HTTP\ResponseMock();
 
         // Invalid dates must be ignored, so this should return true
@@ -256,14 +256,14 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
 
     /**
      */
-    public function testIfModifiedSinceInvalidDate2() {
+    function testIfModifiedSinceInvalidDate2() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray(array(
+        $httpRequest = HTTP\Sapi::createFromServerArray([
             'HTTP_IF_MODIFIED_SINCE' => 'Sun, 06 Nov 1994 08:49:37 EST',
-            'REQUEST_URI'   => '/foo'
-        ));
+            'REQUEST_URI'            => '/foo'
+        ]);
         $httpResponse = new HTTP\ResponseMock();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
 
@@ -272,14 +272,14 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
 
     /**
      */
-    public function testIfUnmodifiedSinceUnModified() {
+    function testIfUnmodifiedSinceUnModified() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray(array(
+        $httpRequest = HTTP\Sapi::createFromServerArray([
             'HTTP_IF_UNMODIFIED_SINCE' => 'Sun, 06 Nov 1994 08:49:37 GMT',
-            'REQUEST_URI'   => '/foo'
-        ));
+            'REQUEST_URI'              => '/foo'
+        ]);
         $httpResponse = new HTTP\Response();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
 
@@ -289,14 +289,14 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
     /**
      * @expectedException Sabre\DAV\Exception\PreconditionFailed
      */
-    public function testIfUnmodifiedSinceModified() {
+    function testIfUnmodifiedSinceModified() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray(array(
+        $httpRequest = HTTP\Sapi::createFromServerArray([
             'HTTP_IF_UNMODIFIED_SINCE' => 'Tue, 06 Nov 1984 08:49:37 GMT',
-            'REQUEST_URI'   => '/foo'
-        ));
+            'REQUEST_URI'              => '/foo'
+        ]);
         $httpResponse = new HTTP\ResponseMock();
         $server->checkPreconditions($httpRequest, $httpResponse);
 
@@ -304,14 +304,14 @@ class ServerPreconditionsTest extends \PHPUnit_Framework_TestCase {
 
     /**
      */
-    public function testIfUnmodifiedSinceInvalidDate() {
+    function testIfUnmodifiedSinceInvalidDate() {
 
-        $root = new SimpleCollection('root',array(new ServerPreconditionsNode()));
+        $root = new SimpleCollection('root', [new ServerPreconditionsNode()]);
         $server = new Server($root);
-        $httpRequest = HTTP\Sapi::createFromServerArray(array(
+        $httpRequest = HTTP\Sapi::createFromServerArray([
             'HTTP_IF_UNMODIFIED_SINCE' => 'Sun, 06 Nov 1984 08:49:37 CET',
-            'REQUEST_URI'   => '/foo'
-        ));
+            'REQUEST_URI'              => '/foo'
+        ]);
         $httpResponse = new HTTP\ResponseMock();
         $this->assertTrue($server->checkPreconditions($httpRequest, $httpResponse));
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerSimpleTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerSimpleTest.php
index 66dde9db8..043179a00 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerSimpleTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerSimpleTest.php
@@ -463,7 +463,7 @@ class ServerSimpleTest extends AbstractServer{
      * There are certain cases where no HTTP status may be set. We need to
      * intercept these and set it to a default error message.
      */
-    function testNoHTTPSTatusSet() {
+    function testNoHTTPStatusSet() {
 
         $this->server->on('method:GET', function() { return false; }, 1);
         $this->server->httpRequest = new HTTP\Request('GET', '/');
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/ServerUpdatePropertiesTest.php b/vendor/sabre/dav/tests/Sabre/DAV/ServerUpdatePropertiesTest.php
index 7fde11b22..383f8e657 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/ServerUpdatePropertiesTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/ServerUpdatePropertiesTest.php
@@ -1,101 +1,100 @@
 <?php
 
 namespace Sabre\DAV;
-use Sabre\HTTP;
 
 class ServerUpdatePropertiesTest extends \PHPUnit_Framework_TestCase {
 
     function testUpdatePropertiesFail() {
 
-        $tree = array(
+        $tree = [
             new SimpleCollection('foo'),
-        );
+        ];
         $server = new Server($tree);
 
-        $result = $server->updateProperties('foo', array(
+        $result = $server->updateProperties('foo', [
             '{DAV:}foo' => 'bar'
-        ));
+        ]);
 
-        $expected = array(
+        $expected = [
             '{DAV:}foo' => 403,
-        );
+        ];
         $this->assertEquals($expected, $result);
 
     }
 
     function testUpdatePropertiesProtected() {
 
-        $tree = array(
+        $tree = [
             new SimpleCollection('foo'),
-        );
+        ];
         $server = new Server($tree);
 
         $server->on('propPatch', function($path, PropPatch $propPatch) {
             $propPatch->handleRemaining(function() { return true; });
         });
-        $result = $server->updateProperties('foo', array(
+        $result = $server->updateProperties('foo', [
             '{DAV:}getetag' => 'bla',
-            '{DAV:}foo' => 'bar'
-        ));
+            '{DAV:}foo'     => 'bar'
+        ]);
 
-        $expected = array(
+        $expected = [
             '{DAV:}getetag' => 403,
-            '{DAV:}foo' => 424,
-        );
+            '{DAV:}foo'     => 424,
+        ];
         $this->assertEquals($expected, $result);
 
     }
 
     function testUpdatePropertiesEventFail() {
 
-        $tree = array(
+        $tree = [
             new SimpleCollection('foo'),
-        );
+        ];
         $server = new Server($tree);
         $server->on('propPatch', function($path, PropPatch $propPatch) {
             $propPatch->setResultCode('{DAV:}foo', 404);
             $propPatch->handleRemaining(function() { return true; });
         });
 
-        $result = $server->updateProperties('foo', array(
-            '{DAV:}foo' => 'bar',
+        $result = $server->updateProperties('foo', [
+            '{DAV:}foo'  => 'bar',
             '{DAV:}foo2' => 'bla',
-        ));
+        ]);
 
-        $expected = array(
-            '{DAV:}foo' => 404,
+        $expected = [
+            '{DAV:}foo'  => 404,
             '{DAV:}foo2' => 424,
-        );
+        ];
         $this->assertEquals($expected, $result);
 
     }
 
     function testUpdatePropertiesEventSuccess() {
 
-        $tree = array(
+        $tree = [
             new SimpleCollection('foo'),
-        );
+        ];
         $server = new Server($tree);
         $server->on('propPatch', function($path, PropPatch $propPatch) {
 
             $propPatch->handle(['{DAV:}foo', '{DAV:}foo2'], function() {
                 return [
-                    '{DAV:}foo' => 200,
+                    '{DAV:}foo'  => 200,
                     '{DAV:}foo2' => 201,
                 ];
             });
 
         });
 
-        $result = $server->updateProperties('foo', array(
-            '{DAV:}foo' => 'bar',
+        $result = $server->updateProperties('foo', [
+            '{DAV:}foo'  => 'bar',
             '{DAV:}foo2' => 'bla',
-        ));
+        ]);
 
-        $expected = array(
-            '{DAV:}foo' => 200,
+        $expected = [
+            '{DAV:}foo'  => 200,
             '{DAV:}foo2' => 201,
-        );
+        ];
         $this->assertEquals($expected, $result);
 
     }
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/SimpleFileTest.php b/vendor/sabre/dav/tests/Sabre/DAV/SimpleFileTest.php
index 9b083b998..15ccfaf9e 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/SimpleFileTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/SimpleFileTest.php
@@ -6,7 +6,7 @@ class SimpleFileTest extends \PHPUnit_Framework_TestCase {
 
     function testAll() {
 
-        $file = new SimpleFile('filename.txt','contents','text/plain');
+        $file = new SimpleFile('filename.txt', 'contents', 'text/plain');
 
         $this->assertEquals('filename.txt', $file->getName());
         $this->assertEquals('contents', $file->get());
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/StringUtilTest.php b/vendor/sabre/dav/tests/Sabre/DAV/StringUtilTest.php
index 941d1f913..8888f0276 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/StringUtilTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/StringUtilTest.php
@@ -15,61 +15,61 @@ class StringUtilTest extends \PHPUnit_Framework_TestCase {
 
     function dataset() {
 
-        return array(
-            array('FOOBAR', 'FOO',    'i;octet', 'contains', true),
-            array('FOOBAR', 'foo',    'i;octet', 'contains', false),
-            array('FÖÖBAR', 'FÖÖ',    'i;octet', 'contains', true),
-            array('FÖÖBAR', 'föö',    'i;octet', 'contains', false),
-            array('FOOBAR', 'FOOBAR', 'i;octet', 'equals', true),
-            array('FOOBAR', 'fooBAR', 'i;octet', 'equals', false),
-            array('FOOBAR', 'FOO',    'i;octet', 'starts-with', true),
-            array('FOOBAR', 'foo',    'i;octet', 'starts-with', false),
-            array('FOOBAR', 'BAR',    'i;octet', 'starts-with', false),
-            array('FOOBAR', 'bar',    'i;octet', 'starts-with', false),
-            array('FOOBAR', 'FOO',    'i;octet', 'ends-with', false),
-            array('FOOBAR', 'foo',    'i;octet', 'ends-with', false),
-            array('FOOBAR', 'BAR',    'i;octet', 'ends-with', true),
-            array('FOOBAR', 'bar',    'i;octet', 'ends-with', false),
-
-            array('FOOBAR', 'FOO',    'i;ascii-casemap', 'contains', true),
-            array('FOOBAR', 'foo',    'i;ascii-casemap', 'contains', true),
-            array('FÖÖBAR', 'FÖÖ',    'i;ascii-casemap', 'contains', true),
-            array('FÖÖBAR', 'föö',    'i;ascii-casemap', 'contains', false),
-            array('FOOBAR', 'FOOBAR', 'i;ascii-casemap', 'equals', true),
-            array('FOOBAR', 'fooBAR', 'i;ascii-casemap', 'equals', true),
-            array('FOOBAR', 'FOO',    'i;ascii-casemap', 'starts-with', true),
-            array('FOOBAR', 'foo',    'i;ascii-casemap', 'starts-with', true),
-            array('FOOBAR', 'BAR',    'i;ascii-casemap', 'starts-with', false),
-            array('FOOBAR', 'bar',    'i;ascii-casemap', 'starts-with', false),
-            array('FOOBAR', 'FOO',    'i;ascii-casemap', 'ends-with', false),
-            array('FOOBAR', 'foo',    'i;ascii-casemap', 'ends-with', false),
-            array('FOOBAR', 'BAR',    'i;ascii-casemap', 'ends-with', true),
-            array('FOOBAR', 'bar',    'i;ascii-casemap', 'ends-with', true),
-
-            array('FOOBAR', 'FOO',    'i;unicode-casemap', 'contains', true),
-            array('FOOBAR', 'foo',    'i;unicode-casemap', 'contains', true),
-            array('FÖÖBAR', 'FÖÖ',    'i;unicode-casemap', 'contains', true),
-            array('FÖÖBAR', 'föö',    'i;unicode-casemap', 'contains', true),
-            array('FOOBAR', 'FOOBAR', 'i;unicode-casemap', 'equals', true),
-            array('FOOBAR', 'fooBAR', 'i;unicode-casemap', 'equals', true),
-            array('FOOBAR', 'FOO',    'i;unicode-casemap', 'starts-with', true),
-            array('FOOBAR', 'foo',    'i;unicode-casemap', 'starts-with', true),
-            array('FOOBAR', 'BAR',    'i;unicode-casemap', 'starts-with', false),
-            array('FOOBAR', 'bar',    'i;unicode-casemap', 'starts-with', false),
-            array('FOOBAR', 'FOO',    'i;unicode-casemap', 'ends-with', false),
-            array('FOOBAR', 'foo',    'i;unicode-casemap', 'ends-with', false),
-            array('FOOBAR', 'BAR',    'i;unicode-casemap', 'ends-with', true),
-            array('FOOBAR', 'bar',    'i;unicode-casemap', 'ends-with', true),
-        );
+        return [
+            ['FOOBAR', 'FOO',    'i;octet', 'contains', true],
+            ['FOOBAR', 'foo',    'i;octet', 'contains', false],
+            ['FÖÖBAR', 'FÖÖ',    'i;octet', 'contains', true],
+            ['FÖÖBAR', 'föö',    'i;octet', 'contains', false],
+            ['FOOBAR', 'FOOBAR', 'i;octet', 'equals', true],
+            ['FOOBAR', 'fooBAR', 'i;octet', 'equals', false],
+            ['FOOBAR', 'FOO',    'i;octet', 'starts-with', true],
+            ['FOOBAR', 'foo',    'i;octet', 'starts-with', false],
+            ['FOOBAR', 'BAR',    'i;octet', 'starts-with', false],
+            ['FOOBAR', 'bar',    'i;octet', 'starts-with', false],
+            ['FOOBAR', 'FOO',    'i;octet', 'ends-with', false],
+            ['FOOBAR', 'foo',    'i;octet', 'ends-with', false],
+            ['FOOBAR', 'BAR',    'i;octet', 'ends-with', true],
+            ['FOOBAR', 'bar',    'i;octet', 'ends-with', false],
+
+            ['FOOBAR', 'FOO',    'i;ascii-casemap', 'contains', true],
+            ['FOOBAR', 'foo',    'i;ascii-casemap', 'contains', true],
+            ['FÖÖBAR', 'FÖÖ',    'i;ascii-casemap', 'contains', true],
+            ['FÖÖBAR', 'föö',    'i;ascii-casemap', 'contains', false],
+            ['FOOBAR', 'FOOBAR', 'i;ascii-casemap', 'equals', true],
+            ['FOOBAR', 'fooBAR', 'i;ascii-casemap', 'equals', true],
+            ['FOOBAR', 'FOO',    'i;ascii-casemap', 'starts-with', true],
+            ['FOOBAR', 'foo',    'i;ascii-casemap', 'starts-with', true],
+            ['FOOBAR', 'BAR',    'i;ascii-casemap', 'starts-with', false],
+            ['FOOBAR', 'bar',    'i;ascii-casemap', 'starts-with', false],
+            ['FOOBAR', 'FOO',    'i;ascii-casemap', 'ends-with', false],
+            ['FOOBAR', 'foo',    'i;ascii-casemap', 'ends-with', false],
+            ['FOOBAR', 'BAR',    'i;ascii-casemap', 'ends-with', true],
+            ['FOOBAR', 'bar',    'i;ascii-casemap', 'ends-with', true],
+
+            ['FOOBAR', 'FOO',    'i;unicode-casemap', 'contains', true],
+            ['FOOBAR', 'foo',    'i;unicode-casemap', 'contains', true],
+            ['FÖÖBAR', 'FÖÖ',    'i;unicode-casemap', 'contains', true],
+            ['FÖÖBAR', 'föö',    'i;unicode-casemap', 'contains', true],
+            ['FOOBAR', 'FOOBAR', 'i;unicode-casemap', 'equals', true],
+            ['FOOBAR', 'fooBAR', 'i;unicode-casemap', 'equals', true],
+            ['FOOBAR', 'FOO',    'i;unicode-casemap', 'starts-with', true],
+            ['FOOBAR', 'foo',    'i;unicode-casemap', 'starts-with', true],
+            ['FOOBAR', 'BAR',    'i;unicode-casemap', 'starts-with', false],
+            ['FOOBAR', 'bar',    'i;unicode-casemap', 'starts-with', false],
+            ['FOOBAR', 'FOO',    'i;unicode-casemap', 'ends-with', false],
+            ['FOOBAR', 'foo',    'i;unicode-casemap', 'ends-with', false],
+            ['FOOBAR', 'BAR',    'i;unicode-casemap', 'ends-with', true],
+            ['FOOBAR', 'bar',    'i;unicode-casemap', 'ends-with', true],
+        ];
 
     }
 
     /**
      * @expectedException Sabre\DAV\Exception\BadRequest
      */
-    public function testBadCollation() {
+    function testBadCollation() {
 
-        StringUtil::textMatch('foobar','foo','blabla','contains');
+        StringUtil::textMatch('foobar', 'foo', 'blabla', 'contains');
 
     }
 
@@ -77,13 +77,13 @@ class StringUtilTest extends \PHPUnit_Framework_TestCase {
     /**
      * @expectedException Sabre\DAV\Exception\BadRequest
      */
-    public function testBadMatchType() {
+    function testBadMatchType() {
 
-        StringUtil::textMatch('foobar','foo','i;octet','booh');
+        StringUtil::textMatch('foobar', 'foo', 'i;octet', 'booh');
 
     }
 
-    public function testEnsureUTF8_ascii() {
+    function testEnsureUTF8_ascii() {
 
         $inputString = "harkema";
         $outputString = "harkema";
@@ -95,7 +95,7 @@ class StringUtilTest extends \PHPUnit_Framework_TestCase {
 
     }
 
-    public function testEnsureUTF8_latin1() {
+    function testEnsureUTF8_latin1() {
 
         $inputString = "m\xfcnster";
         $outputString = "münster";
@@ -107,7 +107,7 @@ class StringUtilTest extends \PHPUnit_Framework_TestCase {
 
     }
 
-    public function testEnsureUTF8_utf8() {
+    function testEnsureUTF8_utf8() {
 
         $inputString = "m\xc3\xbcnster";
         $outputString = "münster";
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/TemporaryFileFilterTest.php b/vendor/sabre/dav/tests/Sabre/DAV/TemporaryFileFilterTest.php
index 7122f4a01..6acd6b077 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/TemporaryFileFilterTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/TemporaryFileFilterTest.php
@@ -25,7 +25,7 @@ class TemporaryFileFilterTest extends AbstractServer {
         $this->assertEquals(201, $this->response->status);
         $this->assertEquals('0', $this->response->getHeader('Content-Length'));
 
-        $this->assertEquals('Testing new file',file_get_contents(SABRE_TEMPDIR . '/testput.txt'));
+        $this->assertEquals('Testing new file', file_get_contents(SABRE_TEMPDIR . '/testput.txt'));
 
     }
 
@@ -39,11 +39,11 @@ class TemporaryFileFilterTest extends AbstractServer {
 
         $this->assertEquals('', $this->response->body);
         $this->assertEquals(201, $this->response->status);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Temp' => ['true'],
-        ),$this->response->getHeaders());
+        ], $this->response->getHeaders());
 
-        $this->assertFalse(file_exists(SABRE_TEMPDIR . '/._testput.txt'),'._testput.txt should not exist in the regular file structure.');
+        $this->assertFalse(file_exists(SABRE_TEMPDIR . '/._testput.txt'), '._testput.txt should not exist in the regular file structure.');
 
     }
 
@@ -57,20 +57,20 @@ class TemporaryFileFilterTest extends AbstractServer {
 
         $this->assertEquals('', $this->response->body);
         $this->assertEquals(201, $this->response->status);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Temp' => ['true'],
-        ),$this->response->getHeaders());
+        ], $this->response->getHeaders());
 
-        $this->assertFalse(file_exists(SABRE_TEMPDIR . '/._testput.txt'),'._testput.txt should not exist in the regular file structure.');
+        $this->assertFalse(file_exists(SABRE_TEMPDIR . '/._testput.txt'), '._testput.txt should not exist in the regular file structure.');
 
 
         $this->server->exec();
 
         $this->assertEquals(412, $this->response->status);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Temp' => ['true'],
             'Content-Type' => ['application/xml; charset=utf-8'],
-        ),$this->response->getHeaders());
+        ], $this->response->getHeaders());
 
     }
 
@@ -83,9 +83,9 @@ class TemporaryFileFilterTest extends AbstractServer {
 
         $this->assertEquals('', $this->response->body);
         $this->assertEquals(201, $this->response->status);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Temp' => ['true'],
-        ),$this->response->getHeaders());
+        ], $this->response->getHeaders());
 
         $request = new HTTP\Request('GET', '/._testput.txt');
 
@@ -93,13 +93,13 @@ class TemporaryFileFilterTest extends AbstractServer {
         $this->server->exec();
 
         $this->assertEquals(200, $this->response->status);
-        $this->assertEquals(array(
-            'X-Sabre-Temp' => ['true'],
+        $this->assertEquals([
+            'X-Sabre-Temp'   => ['true'],
             'Content-Length' => [16],
-            'Content-Type' => ['application/octet-stream'],
-        ),$this->response->getHeaders());
+            'Content-Type'   => ['application/octet-stream'],
+        ], $this->response->getHeaders());
 
-        $this->assertEquals('Testing new file',stream_get_contents($this->response->body));
+        $this->assertEquals('Testing new file', stream_get_contents($this->response->body));
 
     }
 
@@ -125,11 +125,11 @@ class TemporaryFileFilterTest extends AbstractServer {
         $this->server->exec();
 
         $this->assertEquals(201, $this->response->status);
-        $this->assertEquals('application/xml; charset=utf-8',$this->response->getHeader('Content-Type'));
-        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/',$this->response->getHeader('Lock-Token'))===1,'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
-        $this->assertEquals('true',$this->response->getHeader('X-Sabre-Temp'));
+        $this->assertEquals('application/xml; charset=utf-8', $this->response->getHeader('Content-Type'));
+        $this->assertTrue(preg_match('/^<opaquelocktoken:(.*)>$/', $this->response->getHeader('Lock-Token')) === 1, 'We did not get a valid Locktoken back (' . $this->response->getHeader('Lock-Token') . ')');
+        $this->assertEquals('true', $this->response->getHeader('X-Sabre-Temp'));
 
-        $this->assertFalse(file_exists(SABRE_TEMPDIR . '/._testlock.txt'),'._testlock.txt should not exist in the regular file structure.');
+        $this->assertFalse(file_exists(SABRE_TEMPDIR . '/._testlock.txt'), '._testlock.txt should not exist in the regular file structure.');
 
     }
 
@@ -143,20 +143,20 @@ class TemporaryFileFilterTest extends AbstractServer {
 
         $this->assertEquals('', $this->response->body);
         $this->assertEquals(201, $this->response->status);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Temp' => ['true'],
-        ),$this->response->getHeaders());
+        ], $this->response->getHeaders());
 
         $request = new HTTP\Request('DELETE', '/._testput.txt');
         $this->server->httpRequest = $request;
         $this->server->exec();
 
-        $this->assertEquals(204, $this->response->status, "Incorrect status code received. Full body:\n". $this->response->body);
-        $this->assertEquals(array(
+        $this->assertEquals(204, $this->response->status, "Incorrect status code received. Full body:\n" . $this->response->body);
+        $this->assertEquals([
             'X-Sabre-Temp' => ['true'],
-        ),$this->response->getHeaders());
+        ], $this->response->getHeaders());
 
-        $this->assertEquals('',$this->response->body);
+        $this->assertEquals('', $this->response->body);
 
     }
 
@@ -169,30 +169,30 @@ class TemporaryFileFilterTest extends AbstractServer {
 
         $this->assertEquals('', $this->response->body);
         $this->assertEquals(201, $this->response->status);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Temp' => ['true'],
-        ),$this->response->getHeaders());
+        ], $this->response->getHeaders());
 
         $request = new HTTP\Request('PROPFIND', '/._testput.txt');
 
         $this->server->httpRequest = ($request);
         $this->server->exec();
 
-        $this->assertEquals(207, $this->response->status,'Incorrect status code returned. Body: ' . $this->response->body);
-        $this->assertEquals(array(
+        $this->assertEquals(207, $this->response->status, 'Incorrect status code returned. Body: ' . $this->response->body);
+        $this->assertEquals([
             'X-Sabre-Temp' => ['true'],
             'Content-Type' => ['application/xml; charset=utf-8'],
-        ),$this->response->getHeaders());
+        ], $this->response->getHeaders());
 
-        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/","xmlns\\1=\"urn:DAV\"",$this->response->body);
+        $body = preg_replace("/xmlns(:[A-Za-z0-9_])?=(\"|\')DAV:(\"|\')/", "xmlns\\1=\"urn:DAV\"", $this->response->body);
         $xml = simplexml_load_string($body);
-        $xml->registerXPathNamespace('d','urn:DAV');
+        $xml->registerXPathNamespace('d', 'urn:DAV');
 
         list($data) = $xml->xpath('/d:multistatus/d:response/d:href');
-        $this->assertEquals('/._testput.txt',(string)$data,'href element should have been /._testput.txt');
+        $this->assertEquals('/._testput.txt', (string)$data, 'href element should have been /._testput.txt');
 
         $data = $xml->xpath('/d:multistatus/d:response/d:propstat/d:prop/d:resourcetype');
-        $this->assertEquals(1,count($data));
+        $this->assertEquals(1, count($data));
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/TestPlugin.php b/vendor/sabre/dav/tests/Sabre/DAV/TestPlugin.php
index bb5ea6acc..619ac03fd 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/TestPlugin.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/TestPlugin.php
@@ -2,9 +2,8 @@
 
 namespace Sabre\DAV;
 
-use
-    Sabre\HTTP\RequestInterface,
-    Sabre\HTTP\ResponseInterface;
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
 
 class TestPlugin extends ServerPlugin {
 
@@ -24,7 +23,7 @@ class TestPlugin extends ServerPlugin {
 
     function initialize(Server $server) {
 
-        $server->on('beforeMethod', [$this,'beforeMethod']);
+        $server->on('beforeMethod', [$this, 'beforeMethod']);
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAV/TreeTest.php b/vendor/sabre/dav/tests/Sabre/DAV/TreeTest.php
index 9516c2390..ad33200c8 100644
--- a/vendor/sabre/dav/tests/Sabre/DAV/TreeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAV/TreeTest.php
@@ -16,18 +16,18 @@ class TreeTest extends \PHPUnit_Framework_TestCase {
     function testCopy() {
 
         $tree = new TreeMock();
-        $tree->copy('hi','hi2');
+        $tree->copy('hi', 'hi2');
 
         $this->assertArrayHasKey('hi2', $tree->getNodeForPath('')->newDirectories);
         $this->assertEquals('foobar', $tree->getNodeForPath('hi/file')->get());
-        $this->assertEquals(array('test1'=>'value'), $tree->getNodeForPath('hi/file')->getProperties(array()));
+        $this->assertEquals(['test1' => 'value'], $tree->getNodeForPath('hi/file')->getProperties([]));
 
     }
 
     function testMove() {
 
         $tree = new TreeMock();
-        $tree->move('hi','hi2');
+        $tree->move('hi', 'hi2');
 
         $this->assertEquals('hi2', $tree->getNodeForPath('hi')->getName());
         $this->assertTrue($tree->getNodeForPath('hi')->isRenamed);
@@ -37,7 +37,7 @@ class TreeTest extends \PHPUnit_Framework_TestCase {
     function testDeepMove() {
 
         $tree = new TreeMock();
-        $tree->move('hi/sub','hi2');
+        $tree->move('hi/sub', 'hi2');
 
         $this->assertArrayHasKey('hi2', $tree->getNodeForPath('')->newDirectories);
         $this->assertTrue($tree->getNodeForPath('hi/sub')->isDeleted);
@@ -56,7 +56,7 @@ class TreeTest extends \PHPUnit_Framework_TestCase {
 
         $tree = new TreeMock();
         $children = $tree->getChildren('');
-        $this->assertEquals(2,count($children));
+        $this->assertEquals(2, count($children));
         $this->assertEquals('hi', $children[0]->getName());
 
     }
@@ -85,12 +85,12 @@ class TreeTest extends \PHPUnit_Framework_TestCase {
 
 class TreeMock extends Tree {
 
-    private $nodes = array();
+    private $nodes = [];
 
     function __construct() {
 
         $file = new TreeFileTester('file');
-        $file->properties = ['test1'=>'value'];
+        $file->properties = ['test1' => 'value'];
         $file->data = 'foobar';
 
         parent::__construct(
@@ -113,8 +113,8 @@ class TreeMock extends Tree {
 
 class TreeDirectoryTester extends SimpleCollection {
 
-    public $newDirectories = array();
-    public $newFiles = array();
+    public $newDirectories = [];
+    public $newFiles = [];
     public $isDeleted = false;
     public $isRenamed = false;
 
@@ -124,7 +124,7 @@ class TreeDirectoryTester extends SimpleCollection {
 
     }
 
-    function createFile($name,$data = null) {
+    function createFile($name, $data = null) {
 
         $this->newFiles[$name] = $data;
 
@@ -132,7 +132,7 @@ class TreeDirectoryTester extends SimpleCollection {
 
     function getChild($name) {
 
-        if (isset($this->newDirectories[$name])) return new TreeDirectoryTester($name);
+        if (isset($this->newDirectories[$name])) return new self($name);
         if (isset($this->newFiles[$name])) return new TreeFileTester($name, $this->newFiles[$name]);
         return parent::getChild($name);
 
@@ -225,7 +225,7 @@ class TreeMultiGetTester extends TreeDirectoryTester implements IMultiGet {
     function getMultipleChildren(array $paths) {
 
         $result = [];
-        foreach($paths as $path) {
+        foreach ($paths as $path) {
             try {
                 $child = $this->getChild($path);
                 $result[] = $child;
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/ACLMethodTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/ACLMethodTest.php
index 4ecd42717..7d7a54d06 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/ACLMethodTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/ACLMethodTest.php
@@ -14,6 +14,7 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
 
         $acl = new Plugin();
         $server = new DAV\Server();
+        $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin($acl);
 
         $acl->httpAcl($server->httpRequest, $server->httpResponse);
@@ -21,15 +22,14 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
     }
 
     /**
-
-    /**
+     /**
      * @expectedException Sabre\DAV\Exception\MethodNotAllowed
      */
     function testNotSupportedByNode() {
 
-        $tree = array(
+        $tree = [
             new DAV\SimpleCollection('test'),
-        );
+        ];
         $acl = new Plugin();
         $server = new DAV\Server($tree);
         $server->httpRequest = new HTTP\Request();
@@ -37,6 +37,7 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
 <d:acl xmlns:d="DAV:">
 </d:acl>';
         $server->httpRequest->setBody($body);
+        $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
@@ -45,9 +46,9 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
 
     function testSuccessSimple() {
 
-        $tree = array(
-            new MockACLNode('test',array()),
-        );
+        $tree = [
+            new MockACLNode('test', []),
+        ];
         $acl = new Plugin();
         $server = new DAV\Server($tree);
         $server->httpRequest = new HTTP\Request();
@@ -57,6 +58,7 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
 <d:acl xmlns:d="DAV:">
 </d:acl>';
         $server->httpRequest->setBody($body);
+        $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin($acl);
 
         $this->assertFalse($acl->httpACL($server->httpRequest, $server->httpResponse));
@@ -68,12 +70,12 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
      */
     function testUnrecognizedPrincipal() {
 
-        $tree = array(
-            new MockACLNode('test',array()),
-        );
+        $tree = [
+            new MockACLNode('test', []),
+        ];
         $acl = new Plugin();
         $server = new DAV\Server($tree);
-        $server->httpRequest = new HTTP\Request('ACL','/test');
+        $server->httpRequest = new HTTP\Request('ACL', '/test');
         $body = '<?xml version="1.0"?>
 <d:acl xmlns:d="DAV:">
     <d:ace>
@@ -82,6 +84,7 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
     </d:ace>
 </d:acl>';
         $server->httpRequest->setBody($body);
+        $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
@@ -93,15 +96,15 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
      */
     function testUnrecognizedPrincipal2() {
 
-        $tree = array(
-            new MockACLNode('test',array()),
-            new DAV\SimpleCollection('principals',array(
+        $tree = [
+            new MockACLNode('test', []),
+            new DAV\SimpleCollection('principals', [
                 new DAV\SimpleCollection('notaprincipal'),
-            )),
-        );
+            ]),
+        ];
         $acl = new Plugin();
         $server = new DAV\Server($tree);
-        $server->httpRequest = new HTTP\Request('ACL','/test');
+        $server->httpRequest = new HTTP\Request('ACL', '/test');
         $body = '<?xml version="1.0"?>
 <d:acl xmlns:d="DAV:">
     <d:ace>
@@ -110,6 +113,7 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
     </d:ace>
 </d:acl>';
         $server->httpRequest->setBody($body);
+        $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
@@ -121,12 +125,12 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
      */
     function testUnknownPrivilege() {
 
-        $tree = array(
-            new MockACLNode('test',array()),
-        );
+        $tree = [
+            new MockACLNode('test', []),
+        ];
         $acl = new Plugin();
         $server = new DAV\Server($tree);
-        $server->httpRequest = new HTTP\Request('ACL','/test');
+        $server->httpRequest = new HTTP\Request('ACL', '/test');
         $body = '<?xml version="1.0"?>
 <d:acl xmlns:d="DAV:">
     <d:ace>
@@ -135,6 +139,7 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
     </d:ace>
 </d:acl>';
         $server->httpRequest->setBody($body);
+        $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
@@ -146,20 +151,24 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
      */
     function testAbstractPrivilege() {
 
-        $tree = array(
-            new MockACLNode('test',array()),
-        );
+        $tree = [
+            new MockACLNode('test', []),
+        ];
         $acl = new Plugin();
         $server = new DAV\Server($tree);
-        $server->httpRequest = new HTTP\Request('ACL','/test');
+        $server->on('getSupportedPrivilegeSet', function($node, &$supportedPrivilegeSet) {
+            $supportedPrivilegeSet['{DAV:}foo'] = ['abstract' => true];
+        });
+        $server->httpRequest = new HTTP\Request('ACL', '/test');
         $body = '<?xml version="1.0"?>
 <d:acl xmlns:d="DAV:">
     <d:ace>
-        <d:grant><d:privilege><d:all /></d:privilege></d:grant>
-        <d:principal><d:href>/principals/notfound</d:href></d:principal>
+        <d:grant><d:privilege><d:foo /></d:privilege></d:grant>
+        <d:principal><d:href>/principals/foo/</d:href></d:principal>
     </d:ace>
 </d:acl>';
         $server->httpRequest->setBody($body);
+        $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
@@ -171,20 +180,20 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
      */
     function testUpdateProtectedPrivilege() {
 
-        $oldACL = array(
-            array(
+        $oldACL = [
+            [
                 'principal' => 'principals/notfound',
                 'privilege' => '{DAV:}write',
                 'protected' => true,
-            ),
-        );
+            ],
+        ];
 
-        $tree = array(
-            new MockACLNode('test',$oldACL),
-        );
+        $tree = [
+            new MockACLNode('test', $oldACL),
+        ];
         $acl = new Plugin();
         $server = new DAV\Server($tree);
-        $server->httpRequest = new HTTP\Request('ACL','/test');
+        $server->httpRequest = new HTTP\Request('ACL', '/test');
         $body = '<?xml version="1.0"?>
 <d:acl xmlns:d="DAV:">
     <d:ace>
@@ -193,6 +202,7 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
     </d:ace>
 </d:acl>';
         $server->httpRequest->setBody($body);
+        $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
@@ -204,20 +214,20 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
      */
     function testUpdateProtectedPrivilege2() {
 
-        $oldACL = array(
-            array(
+        $oldACL = [
+            [
                 'principal' => 'principals/notfound',
                 'privilege' => '{DAV:}write',
                 'protected' => true,
-            ),
-        );
+            ],
+        ];
 
-        $tree = array(
-            new MockACLNode('test',$oldACL),
-        );
+        $tree = [
+            new MockACLNode('test', $oldACL),
+        ];
         $acl = new Plugin();
         $server = new DAV\Server($tree);
-        $server->httpRequest = new HTTP\Request('ACL','/test');
+        $server->httpRequest = new HTTP\Request('ACL', '/test');
         $body = '<?xml version="1.0"?>
 <d:acl xmlns:d="DAV:">
     <d:ace>
@@ -226,6 +236,7 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
     </d:ace>
 </d:acl>';
         $server->httpRequest->setBody($body);
+        $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
@@ -237,20 +248,20 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
      */
     function testUpdateProtectedPrivilege3() {
 
-        $oldACL = array(
-            array(
+        $oldACL = [
+            [
                 'principal' => 'principals/notfound',
                 'privilege' => '{DAV:}write',
                 'protected' => true,
-            ),
-        );
+            ],
+        ];
 
-        $tree = array(
-            new MockACLNode('test',$oldACL),
-        );
+        $tree = [
+            new MockACLNode('test', $oldACL),
+        ];
         $acl = new Plugin();
         $server = new DAV\Server($tree);
-        $server->httpRequest = new HTTP\Request('ACL','/test');
+        $server->httpRequest = new HTTP\Request('ACL', '/test');
         $body = '<?xml version="1.0"?>
 <d:acl xmlns:d="DAV:">
     <d:ace>
@@ -259,6 +270,7 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
     </d:ace>
 </d:acl>';
         $server->httpRequest->setBody($body);
+        $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin($acl);
 
         $acl->httpACL($server->httpRequest, $server->httpResponse);
@@ -267,28 +279,28 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
 
     function testSuccessComplex() {
 
-        $oldACL = array(
-            array(
+        $oldACL = [
+            [
                 'principal' => 'principals/foo',
                 'privilege' => '{DAV:}write',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'principal' => 'principals/bar',
                 'privilege' => '{DAV:}read',
-            ),
-        );
-
-        $tree = array(
-            $node = new MockACLNode('test',$oldACL),
-            new DAV\SimpleCollection('principals', array(
-                new MockPrincipal('foo','principals/foo'),
-                new MockPrincipal('baz','principals/baz'),
-            )),
-        );
+            ],
+        ];
+
+        $tree = [
+            $node = new MockACLNode('test', $oldACL),
+            new DAV\SimpleCollection('principals', [
+                new MockPrincipal('foo', 'principals/foo'),
+                new MockPrincipal('baz', 'principals/baz'),
+            ]),
+        ];
         $acl = new Plugin();
         $server = new DAV\Server($tree);
-        $server->httpRequest = new HTTP\Request('ACL','/test');
+        $server->httpRequest = new HTTP\Request('ACL', '/test');
         $body = '<?xml version="1.0"?>
 <d:acl xmlns:d="DAV:">
     <d:ace>
@@ -302,23 +314,24 @@ class ACLMethodTest extends \PHPUnit_Framework_TestCase {
     </d:ace>
 </d:acl>';
         $server->httpRequest->setBody($body);
+        $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin($acl);
 
 
         $this->assertFalse($acl->httpAcl($server->httpRequest, $server->httpResponse));
 
-        $this->assertEquals(array(
-            array(
+        $this->assertEquals([
+            [
                 'principal' => 'principals/foo',
                 'privilege' => '{DAV:}write',
                 'protected' => true,
-            ),
-            array(
+            ],
+            [
                 'principal' => 'principals/baz',
                 'privilege' => '{DAV:}write',
                 'protected' => false,
-            ),
-        ), $node->getACL());
+            ],
+        ], $node->getACL());
 
     }
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/AllowAccessTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/AllowAccessTest.php
index 14a80003a..f16693625 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/AllowAccessTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/AllowAccessTest.php
@@ -3,7 +3,6 @@
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
-use Sabre\HTTP;
 
 class AllowAccessTest extends \PHPUnit_Framework_TestCase {
 
@@ -14,13 +13,24 @@ class AllowAccessTest extends \PHPUnit_Framework_TestCase {
 
     function setUp() {
 
-        $nodes = array(
-            new DAV\SimpleCollection('testdir'),
-        );
+        $nodes = [
+            new DAV\Mock\Collection('testdir', [
+                'file1.txt' => 'contents',
+            ]),
+        ];
 
         $this->server = new DAV\Server($nodes);
+        $this->server->addPlugin(
+            new DAV\Auth\Plugin(
+                new DAV\Auth\Backend\Mock()
+            )
+        );
+        // Login
+        $this->server->getPlugin('auth')->beforeMethod(
+            new \Sabre\HTTP\Request(),
+            new \Sabre\HTTP\Response()
+        );
         $aclPlugin = new Plugin();
-        $aclPlugin->allowAccessToNodesWithoutACL = true;
         $this->server->addPlugin($aclPlugin);
 
     }
@@ -64,16 +74,7 @@ class AllowAccessTest extends \PHPUnit_Framework_TestCase {
     function testPUT() {
 
         $this->server->httpRequest->setMethod('PUT');
-        $this->server->httpRequest->setUrl('/testdir');
-
-        $this->assertTrue($this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]));
-
-    }
-
-    function testACL() {
-
-        $this->server->httpRequest->setMethod('ACL');
-        $this->server->httpRequest->setUrl('/testdir');
+        $this->server->httpRequest->setUrl('/testdir/file1.txt');
 
         $this->assertTrue($this->server->emit('beforeMethod', [$this->server->httpRequest, $this->server->httpResponse]));
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/BlockAccessTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/BlockAccessTest.php
index be3e9dae9..ceae9aed0 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/BlockAccessTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/BlockAccessTest.php
@@ -3,7 +3,6 @@
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
-use Sabre\HTTP;
 
 class BlockAccessTest extends \PHPUnit_Framework_TestCase {
 
@@ -21,7 +20,17 @@ class BlockAccessTest extends \PHPUnit_Framework_TestCase {
 
         $this->server = new DAV\Server($nodes);
         $this->plugin = new Plugin();
-        $this->plugin->allowAccessToNodesWithoutACL = false;
+        $this->plugin->setDefaultAcl([]);
+        $this->server->addPlugin(
+            new DAV\Auth\Plugin(
+                new DAV\Auth\Backend\Mock()
+            )
+        );
+        // Login
+        $this->server->getPlugin('auth')->beforeMethod(
+            new \Sabre\HTTP\Request(),
+            new \Sabre\HTTP\Response()
+        );
         $this->server->addPlugin($this->plugin);
 
     }
@@ -178,10 +187,10 @@ class BlockAccessTest extends \PHPUnit_Framework_TestCase {
             200 => [],
             404 => [],
             403 => [
-                '{DAV:}displayname' => null,
+                '{DAV:}displayname'      => null,
                 '{DAV:}getcontentlength' => null,
-                '{DAV:}bar' => null,
-                '{DAV:}owner' => null,
+                '{DAV:}bar'              => null,
+                '{DAV:}owner'            => null,
             ],
         ];
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/AceConflictTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/AceConflictTest.php
index fc48af67f..1cdf2949f 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/AceConflictTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/AceConflictTest.php
@@ -11,24 +11,24 @@ class AceConflictTest extends \PHPUnit_Framework_TestCase {
         $ex = new AceConflict('message');
 
         $server = new DAV\Server();
-        $dom = new \DOMDocument('1.0','utf-8');
-        $root = $dom->createElementNS('DAV:','d:root');
+        $dom = new \DOMDocument('1.0', 'utf-8');
+        $root = $dom->createElementNS('DAV:', 'd:root');
         $dom->appendChild($root);
 
         $ex->serialize($server, $root);
 
-        $xpaths = array(
-            '/d:root' => 1,
+        $xpaths = [
+            '/d:root'                   => 1,
             '/d:root/d:no-ace-conflict' => 1,
-        );
+        ];
 
         // Reloading because PHP DOM sucks
         $dom2 = new \DOMDocument('1.0', 'utf-8');
         $dom2->loadXML($dom->saveXML());
 
         $dxpath = new \DOMXPath($dom2);
-        $dxpath->registerNamespace('d','DAV:');
-        foreach($xpaths as $xpath=>$count) {
+        $dxpath->registerNamespace('d', 'DAV:');
+        foreach ($xpaths as $xpath => $count) {
 
             $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : ' . $xpath . ', we could only find ' . $dxpath->query($xpath)->length . ' elements, while we expected ' . $count);
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NeedPrivilegesExceptionTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NeedPrivilegesExceptionTest.php
index 7e66adab6..b13e7722d 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NeedPrivilegesExceptionTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NeedPrivilegesExceptionTest.php
@@ -4,41 +4,41 @@ namespace Sabre\DAVACL\Exception;
 
 use Sabre\DAV;
 
-class NeedPrivilegesTest extends \PHPUnit_Framework_TestCase {
+class NeedPrivilegesExceptionTest extends \PHPUnit_Framework_TestCase {
 
     function testSerialize() {
 
         $uri = 'foo';
-        $privileges = array(
+        $privileges = [
             '{DAV:}read',
             '{DAV:}write',
-        );
+        ];
         $ex = new NeedPrivileges($uri, $privileges);
 
         $server = new DAV\Server();
-        $dom = new \DOMDocument('1.0','utf-8');
-        $root = $dom->createElementNS('DAV:','d:root');
+        $dom = new \DOMDocument('1.0', 'utf-8');
+        $root = $dom->createElementNS('DAV:', 'd:root');
         $dom->appendChild($root);
 
         $ex->serialize($server, $root);
 
-        $xpaths = array(
-            '/d:root' => 1,
-            '/d:root/d:need-privileges' => 1,
-            '/d:root/d:need-privileges/d:resource' => 2,
-            '/d:root/d:need-privileges/d:resource/d:href' => 2,
-            '/d:root/d:need-privileges/d:resource/d:privilege' => 2,
-            '/d:root/d:need-privileges/d:resource/d:privilege/d:read' => 1,
+        $xpaths = [
+            '/d:root'                                                  => 1,
+            '/d:root/d:need-privileges'                                => 1,
+            '/d:root/d:need-privileges/d:resource'                     => 2,
+            '/d:root/d:need-privileges/d:resource/d:href'              => 2,
+            '/d:root/d:need-privileges/d:resource/d:privilege'         => 2,
+            '/d:root/d:need-privileges/d:resource/d:privilege/d:read'  => 1,
             '/d:root/d:need-privileges/d:resource/d:privilege/d:write' => 1,
-        );
+        ];
 
         // Reloading because PHP DOM sucks
         $dom2 = new \DOMDocument('1.0', 'utf-8');
         $dom2->loadXML($dom->saveXML());
 
         $dxpath = new \DOMXPath($dom2);
-        $dxpath->registerNamespace('d','DAV:');
-        foreach($xpaths as $xpath=>$count) {
+        $dxpath->registerNamespace('d', 'DAV:');
+        foreach ($xpaths as $xpath => $count) {
 
             $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : ' . $xpath . ', we could only find ' . $dxpath->query($xpath)->length . ' elements, while we expected ' . $count);
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NoAbstractTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NoAbstractTest.php
index 2406c1c38..f52b17371 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NoAbstractTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NoAbstractTest.php
@@ -11,24 +11,24 @@ class NoAbstractTest extends \PHPUnit_Framework_TestCase {
         $ex = new NoAbstract('message');
 
         $server = new DAV\Server();
-        $dom = new \DOMDocument('1.0','utf-8');
-        $root = $dom->createElementNS('DAV:','d:root');
+        $dom = new \DOMDocument('1.0', 'utf-8');
+        $root = $dom->createElementNS('DAV:', 'd:root');
         $dom->appendChild($root);
 
         $ex->serialize($server, $root);
 
-        $xpaths = array(
-            '/d:root' => 1,
+        $xpaths = [
+            '/d:root'               => 1,
             '/d:root/d:no-abstract' => 1,
-        );
+        ];
 
         // Reloading because PHP DOM sucks
         $dom2 = new \DOMDocument('1.0', 'utf-8');
         $dom2->loadXML($dom->saveXML());
 
         $dxpath = new \DOMXPath($dom2);
-        $dxpath->registerNamespace('d','DAV:');
-        foreach($xpaths as $xpath=>$count) {
+        $dxpath->registerNamespace('d', 'DAV:');
+        foreach ($xpaths as $xpath => $count) {
 
             $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : ' . $xpath . ', we could only find ' . $dxpath->query($xpath)->length . ' elements, while we expected ' . $count);
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotRecognizedPrincipalTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotRecognizedPrincipalTest.php
index 6077b0ba5..df89aaf84 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotRecognizedPrincipalTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotRecognizedPrincipalTest.php
@@ -11,24 +11,24 @@ class NotRecognizedPrincipalTest extends \PHPUnit_Framework_TestCase {
         $ex = new NotRecognizedPrincipal('message');
 
         $server = new DAV\Server();
-        $dom = new \DOMDocument('1.0','utf-8');
-        $root = $dom->createElementNS('DAV:','d:root');
+        $dom = new \DOMDocument('1.0', 'utf-8');
+        $root = $dom->createElementNS('DAV:', 'd:root');
         $dom->appendChild($root);
 
         $ex->serialize($server, $root);
 
-        $xpaths = array(
-            '/d:root' => 1,
+        $xpaths = [
+            '/d:root'                        => 1,
             '/d:root/d:recognized-principal' => 1,
-        );
+        ];
 
         // Reloading because PHP DOM sucks
         $dom2 = new \DOMDocument('1.0', 'utf-8');
         $dom2->loadXML($dom->saveXML());
 
         $dxpath = new \DOMXPath($dom2);
-        $dxpath->registerNamespace('d','DAV:');
-        foreach($xpaths as $xpath=>$count) {
+        $dxpath->registerNamespace('d', 'DAV:');
+        foreach ($xpaths as $xpath => $count) {
 
             $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : ' . $xpath . ', we could only find ' . $dxpath->query($xpath)->length . ' elements, while we expected ' . $count);
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotSupportedPrivilegeTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotSupportedPrivilegeTest.php
index 8e7b3685d..50623952b 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotSupportedPrivilegeTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/Exception/NotSupportedPrivilegeTest.php
@@ -11,24 +11,24 @@ class NotSupportedPrivilegeTest extends \PHPUnit_Framework_TestCase {
         $ex = new NotSupportedPrivilege('message');
 
         $server = new DAV\Server();
-        $dom = new \DOMDocument('1.0','utf-8');
-        $root = $dom->createElementNS('DAV:','d:root');
+        $dom = new \DOMDocument('1.0', 'utf-8');
+        $root = $dom->createElementNS('DAV:', 'd:root');
         $dom->appendChild($root);
 
         $ex->serialize($server, $root);
 
-        $xpaths = array(
-            '/d:root' => 1,
+        $xpaths = [
+            '/d:root'                           => 1,
             '/d:root/d:not-supported-privilege' => 1,
-        );
+        ];
 
         // Reloading because PHP DOM sucks
         $dom2 = new \DOMDocument('1.0', 'utf-8');
         $dom2->loadXML($dom->saveXML());
 
         $dxpath = new \DOMXPath($dom2);
-        $dxpath->registerNamespace('d','DAV:');
-        foreach($xpaths as $xpath=>$count) {
+        $dxpath->registerNamespace('d', 'DAV:');
+        foreach ($xpaths as $xpath => $count) {
 
             $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : ' . $xpath . ', we could only find ' . $dxpath->query($xpath)->length . ' elements, while we expected ' . $count);
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/ExpandPropertiesTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/ExpandPropertiesTest.php
index 5e99f2e73..91de64372 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/ExpandPropertiesTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/ExpandPropertiesTest.php
@@ -11,31 +11,38 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
 
     function getServer() {
 
-        $tree = array(
-            new DAV\Mock\PropertiesCollection('node1', [], array(
+        $tree = [
+            new DAV\Mock\PropertiesCollection('node1', [], [
                 '{http://sabredav.org/ns}simple' => 'foo',
                 '{http://sabredav.org/ns}href'   => new DAV\Xml\Property\Href('node2'),
-                '{DAV:}displayname'     => 'Node 1',
-            )),
-            new DAV\Mock\PropertiesCollection('node2', [], array(
+                '{DAV:}displayname'              => 'Node 1',
+            ]),
+            new DAV\Mock\PropertiesCollection('node2', [], [
+                '{http://sabredav.org/ns}simple'   => 'simple',
+                '{http://sabredav.org/ns}hreflist' => new DAV\Xml\Property\Href(['node1', 'node3']),
+                '{DAV:}displayname'                => 'Node 2',
+            ]),
+            new DAV\Mock\PropertiesCollection('node3', [], [
                 '{http://sabredav.org/ns}simple' => 'simple',
-                '{http://sabredav.org/ns}hreflist' => new DAV\Xml\Property\Href(['node1','node3']),
-                '{DAV:}displayname'     => 'Node 2',
-            )),
-            new DAV\Mock\PropertiesCollection('node3', [], array(
-                '{http://sabredav.org/ns}simple' => 'simple',
-                '{DAV:}displayname'     => 'Node 3',
-            )),
-        );
+                '{DAV:}displayname'              => 'Node 3',
+            ]),
+        ];
 
         $fakeServer = new DAV\Server($tree);
         $fakeServer->sapi = new HTTP\SapiMock();
         $fakeServer->debugExceptions = true;
         $fakeServer->httpResponse = new HTTP\ResponseMock();
         $plugin = new Plugin();
-        $plugin->allowAccessToNodesWithoutACL = true;
-
+        $plugin->allowUnauthenticatedAccess = false;
+        // Anyone can do anything
+        $plugin->setDefaultACL([
+            [
+                'principal' => '{DAV:}all',
+                'privilege' => '{DAV:}all',
+            ]
+        ]);
         $this->assertTrue($plugin instanceof Plugin);
+
         $fakeServer->addPlugin($plugin);
         $this->assertEquals($plugin, $fakeServer->getPlugin('acl'));
 
@@ -53,11 +60,11 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
   <d:property name="href" namespace="http://sabredav.org/ns" />
 </d:expand-property>';
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
             'HTTP_DEPTH'     => '0',
             'REQUEST_URI'    => '/node1',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody($xml);
@@ -67,38 +74,38 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
 
         $server->exec();
 
-        $this->assertEquals(207, $server->httpResponse->status,'Incorrect status code received. Full body: ' . $server->httpResponse->body);
-        $this->assertEquals(array(
+        $this->assertEquals(207, $server->httpResponse->status, 'Incorrect status code received. Full body: ' . $server->httpResponse->body);
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ), $server->httpResponse->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $server->httpResponse->getHeaders());
 
 
-        $check = array(
+        $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response' => 1,
-            '/d:multistatus/d:response/d:href' => 1,
-            '/d:multistatus/d:response/d:propstat' => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop' => 2,
+            '/d:multistatus/d:response'                                 => 1,
+            '/d:multistatus/d:response/d:href'                          => 1,
+            '/d:multistatus/d:response/d:propstat'                      => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop'               => 2,
             '/d:multistatus/d:response/d:propstat/d:prop/d:displayname' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:simple' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:href' => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:simple'      => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:href'        => 1,
             '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:href' => 1,
-        );
+        ];
 
         $xml = simplexml_load_string($server->httpResponse->body);
-        $xml->registerXPathNamespace('d','DAV:');
-        $xml->registerXPathNamespace('s','http://sabredav.org/ns');
-        foreach($check as $v1=>$v2) {
+        $xml->registerXPathNamespace('d', 'DAV:');
+        $xml->registerXPathNamespace('s', 'http://sabredav.org/ns');
+        foreach ($check as $v1 => $v2) {
 
-            $xpath = is_int($v1)?$v2:$v1;
+            $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
             if (!is_int($v1)) $count = $v2;
 
-            $this->assertEquals($count,count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response: ' . $server->httpResponse->body);
+            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response: ' . $server->httpResponse->body);
 
         }
 
@@ -116,11 +123,11 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
   </d:property>
 </d:expand-property>';
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
             'HTTP_DEPTH'     => '0',
             'REQUEST_URI'    => '/node1',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody($xml);
@@ -131,39 +138,39 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(207, $server->httpResponse->status, 'Incorrect response status received. Full response body: ' . $server->httpResponse->body);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ), $server->httpResponse->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $server->httpResponse->getHeaders());
 
 
-        $check = array(
+        $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response' => 1,
-            '/d:multistatus/d:response/d:href' => 1,
-            '/d:multistatus/d:response/d:propstat' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:href' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:href' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:propstat' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:propstat/d:prop' => 1,
+            '/d:multistatus/d:response'                                                                     => 1,
+            '/d:multistatus/d:response/d:href'                                                              => 1,
+            '/d:multistatus/d:response/d:propstat'                                                          => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop'                                                   => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:href'                                            => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response'                                 => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:href'                          => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:propstat'                      => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:propstat/d:prop'               => 1,
             '/d:multistatus/d:response/d:propstat/d:prop/s:href/d:response/d:propstat/d:prop/d:displayname' => 1,
-        );
+        ];
 
         $xml = simplexml_load_string($server->httpResponse->body);
-        $xml->registerXPathNamespace('d','DAV:');
-        $xml->registerXPathNamespace('s','http://sabredav.org/ns');
-        foreach($check as $v1=>$v2) {
+        $xml->registerXPathNamespace('d', 'DAV:');
+        $xml->registerXPathNamespace('s', 'http://sabredav.org/ns');
+        foreach ($check as $v1 => $v2) {
 
-            $xpath = is_int($v1)?$v2:$v1;
+            $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
             if (!is_int($v1)) $count = $v2;
 
-            $this->assertEquals($count,count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . ' Full response body: ' . $server->httpResponse->getBodyAsString());
+            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . ' Full response body: ' . $server->httpResponse->getBodyAsString());
 
         }
 
@@ -181,11 +188,11 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
   </d:property>
 </d:expand-property>';
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
             'HTTP_DEPTH'     => '0',
             'REQUEST_URI'    => '/node2',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody($xml);
@@ -196,39 +203,39 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(207, $server->httpResponse->status);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ), $server->httpResponse->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $server->httpResponse->getHeaders());
 
 
-        $check = array(
+        $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response' => 1,
-            '/d:multistatus/d:response/d:href' => 1,
-            '/d:multistatus/d:response/d:propstat' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response' => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:href' => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat' => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop' => 2,
+            '/d:multistatus/d:response'                                                                         => 1,
+            '/d:multistatus/d:response/d:href'                                                                  => 1,
+            '/d:multistatus/d:response/d:propstat'                                                              => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop'                                                       => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist'                                            => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response'                                 => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:href'                          => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat'                      => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop'               => 2,
             '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/d:displayname' => 2,
-        );
+        ];
 
         $xml = simplexml_load_string($server->httpResponse->body);
-        $xml->registerXPathNamespace('d','DAV:');
-        $xml->registerXPathNamespace('s','http://sabredav.org/ns');
-        foreach($check as $v1=>$v2) {
+        $xml->registerXPathNamespace('d', 'DAV:');
+        $xml->registerXPathNamespace('s', 'http://sabredav.org/ns');
+        foreach ($check as $v1 => $v2) {
 
-            $xpath = is_int($v1)?$v2:$v1;
+            $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
             if (!is_int($v1)) $count = $v2;
 
-            $this->assertEquals($count,count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result));
+            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result));
 
         }
 
@@ -249,11 +256,11 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
   </d:property>
 </d:expand-property>';
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
             'HTTP_DEPTH'     => '0',
             'REQUEST_URI'    => '/node2',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody($xml);
@@ -264,45 +271,45 @@ class ExpandPropertiesTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(207, $server->httpResponse->status);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ), $server->httpResponse->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $server->httpResponse->getHeaders());
 
 
-        $check = array(
+        $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response' => 1,
-            '/d:multistatus/d:response/d:href' => 1,
-            '/d:multistatus/d:response/d:propstat' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response' => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:href' => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat' => 3,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop' => 3,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/d:displayname' => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href' => 2,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:href' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:propstat' => 1,
-            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:propstat/d:prop' => 1,
+            '/d:multistatus/d:response'                                                                                                             => 1,
+            '/d:multistatus/d:response/d:href'                                                                                                      => 1,
+            '/d:multistatus/d:response/d:propstat'                                                                                                  => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop'                                                                                           => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist'                                                                                => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response'                                                                     => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:href'                                                              => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat'                                                          => 3,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop'                                                   => 3,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/d:displayname'                                     => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href'                                            => 2,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response'                                 => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:href'                          => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:propstat'                      => 1,
+            '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:propstat/d:prop'               => 1,
             '/d:multistatus/d:response/d:propstat/d:prop/s:hreflist/d:response/d:propstat/d:prop/s:href/d:response/d:propstat/d:prop/d:displayname' => 1,
-        );
+        ];
 
         $xml = simplexml_load_string($server->httpResponse->body);
-        $xml->registerXPathNamespace('d','DAV:');
-        $xml->registerXPathNamespace('s','http://sabredav.org/ns');
-        foreach($check as $v1=>$v2) {
+        $xml->registerXPathNamespace('d', 'DAV:');
+        $xml->registerXPathNamespace('s', 'http://sabredav.org/ns');
+        foreach ($check as $v1 => $v2) {
 
-            $xpath = is_int($v1)?$v2:$v1;
+            $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
             if (!is_int($v1)) $count = $v2;
 
-            $this->assertEquals($count,count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result));
+            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result));
 
         }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/MockACLNode.php b/vendor/sabre/dav/tests/Sabre/DAVACL/MockACLNode.php
index 7b3e8fc12..2d9744e29 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/MockACLNode.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/MockACLNode.php
@@ -3,14 +3,13 @@
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
-use Sabre\HTTP;
 
 class MockACLNode extends DAV\Node implements IACL {
 
     public $name;
     public $acl;
 
-    function __construct($name, array $acl = array()) {
+    function __construct($name, array $acl = []) {
 
         $this->name = $name;
         $this->acl = $acl;
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/MockPrincipal.php b/vendor/sabre/dav/tests/Sabre/DAVACL/MockPrincipal.php
index dd8542b8d..934906802 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/MockPrincipal.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/MockPrincipal.php
@@ -3,16 +3,15 @@
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
-use Sabre\HTTP;
 
 class MockPrincipal extends DAV\Node implements IPrincipal {
 
     public $name;
     public $principalUrl;
-    public $groupMembership = array();
-    public $groupMemberSet = array();
+    public $groupMembership = [];
+    public $groupMemberSet = [];
 
-    function __construct($name,$principalUrl,array $groupMembership = array(), array $groupMemberSet = array()) {
+    function __construct($name, $principalUrl, array $groupMembership = [], array $groupMemberSet = []) {
 
         $this->name = $name;
         $this->principalUrl = $principalUrl;
@@ -35,7 +34,7 @@ class MockPrincipal extends DAV\Node implements IPrincipal {
 
     function getAlternateUriSet() {
 
-        return array();
+        return [];
 
     }
 
@@ -63,4 +62,3 @@ class MockPrincipal extends DAV\Node implements IPrincipal {
 
     }
 }
-
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PluginAdminTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PluginAdminTest.php
index fb7516a78..8552448f5 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PluginAdminTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PluginAdminTest.php
@@ -5,7 +5,6 @@ namespace Sabre\DAVACL;
 use Sabre\DAV;
 use Sabre\HTTP;
 
-
 require_once 'Sabre/DAVACL/MockACLNode.php';
 require_once 'Sabre/HTTP/ResponseMock.php';
 
@@ -17,10 +16,10 @@ class PluginAdminTest extends \PHPUnit_Framework_TestCase {
 
         $principalBackend = new PrincipalBackend\Mock();
 
-        $tree = array(
-            new MockACLNode('adminonly', array()),
+        $tree = [
+            new MockACLNode('adminonly', []),
             new PrincipalCollection($principalBackend),
-        );
+        ];
 
         $this->server = new DAV\Server($tree);
         $this->server->sapi = new HTTP\SapiMock();
@@ -33,11 +32,11 @@ class PluginAdminTest extends \PHPUnit_Framework_TestCase {
         $plugin = new Plugin();
         $this->server->addPlugin($plugin);
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'OPTIONS',
-            'HTTP_DEPTH' => 1,
-            'REQUEST_URI' => '/adminonly',
-        ));
+            'HTTP_DEPTH'     => 1,
+            'REQUEST_URI'    => '/adminonly',
+        ]);
 
         $response = new HTTP\ResponseMock();
 
@@ -56,16 +55,16 @@ class PluginAdminTest extends \PHPUnit_Framework_TestCase {
     function testAdminAccess() {
 
         $plugin = new Plugin();
-        $plugin->adminPrincipals = array(
+        $plugin->adminPrincipals = [
             'principals/admin',
-        );
+        ];
         $this->server->addPlugin($plugin);
 
-        $request = HTTP\Sapi::createFromServerArray(array(
+        $request = HTTP\Sapi::createFromServerArray([
             'REQUEST_METHOD' => 'OPTIONS',
-            'HTTP_DEPTH' => 1,
-            'REQUEST_URI' => '/adminonly',
-        ));
+            'HTTP_DEPTH'     => 1,
+            'REQUEST_URI'    => '/adminonly',
+        ]);
 
         $response = new HTTP\ResponseMock();
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PluginPropertiesTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PluginPropertiesTest.php
index e5b7e1a3f..fb42efba7 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PluginPropertiesTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PluginPropertiesTest.php
@@ -10,6 +10,14 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
     function testPrincipalCollectionSet() {
 
         $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
+        $plugin->setDefaultACL([
+            [
+                'principal' => '{DAV:}all',
+                'privilege' => '{DAV:}all',
+            ],
+        ]);
+        //Anyone can do anything
         $plugin->principalCollectionSet = [
             'principals1',
             'principals2',
@@ -25,8 +33,8 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $result = $server->getPropertiesForPath('', $requestedProperties);
         $result = $result[0];
 
-        $this->assertEquals(1,count($result[200]));
-        $this->assertArrayHasKey('{DAV:}principal-collection-set',$result[200]);
+        $this->assertEquals(1, count($result[200]));
+        $this->assertArrayHasKey('{DAV:}principal-collection-set', $result[200]);
         $this->assertInstanceOf('Sabre\\DAV\\Xml\\Property\\Href', $result[200]['{DAV:}principal-collection-set']);
 
         $expected = [
@@ -46,6 +54,12 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $plugin = new DAV\Auth\Plugin(new DAV\Auth\Backend\Mock());
         $fakeServer->addPlugin($plugin);
         $plugin = new Plugin();
+        $plugin->setDefaultACL([
+            [
+                'principal' => '{DAV:}all',
+                'privilege' => '{DAV:}all',
+            ],
+        ]);
         $fakeServer->addPlugin($plugin);
 
 
@@ -56,8 +70,8 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $result = $fakeServer->getPropertiesForPath('', $requestedProperties);
         $result = $result[0];
 
-        $this->assertEquals(1,count($result[200]));
-        $this->assertArrayHasKey('{DAV:}current-user-principal',$result[200]);
+        $this->assertEquals(1, count($result[200]));
+        $this->assertArrayHasKey('{DAV:}current-user-principal', $result[200]);
         $this->assertInstanceOf('Sabre\DAVACL\Xml\Property\Principal', $result[200]['{DAV:}current-user-principal']);
         $this->assertEquals(Xml\Property\Principal::UNAUTHENTICATED, $result[200]['{DAV:}current-user-principal']->getType());
 
@@ -67,8 +81,8 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $result = $fakeServer->getPropertiesForPath('', $requestedProperties);
         $result = $result[0];
 
-        $this->assertEquals(1,count($result[200]));
-        $this->assertArrayHasKey('{DAV:}current-user-principal',$result[200]);
+        $this->assertEquals(1, count($result[200]));
+        $this->assertArrayHasKey('{DAV:}current-user-principal', $result[200]);
         $this->assertInstanceOf('Sabre\DAVACL\Xml\Property\Principal', $result[200]['{DAV:}current-user-principal']);
         $this->assertEquals(Xml\Property\Principal::HREF, $result[200]['{DAV:}current-user-principal']->getType());
         $this->assertEquals('principals/admin/', $result[200]['{DAV:}current-user-principal']->getHref());
@@ -78,6 +92,13 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
     function testSupportedPrivilegeSet() {
 
         $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
+        $plugin->setDefaultACL([
+            [
+                'principal' => '{DAV:}all',
+                'privilege' => '{DAV:}all',
+            ],
+        ]);
         $server = new DAV\Server();
         $server->addPlugin($plugin);
 
@@ -88,8 +109,8 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $result = $server->getPropertiesForPath('', $requestedProperties);
         $result = $result[0];
 
-        $this->assertEquals(1,count($result[200]));
-        $this->assertArrayHasKey('{DAV:}supported-privilege-set',$result[200]);
+        $this->assertEquals(1, count($result[200]));
+        $this->assertArrayHasKey('{DAV:}supported-privilege-set', $result[200]);
         $this->assertInstanceOf('Sabre\\DAVACL\\Xml\\Property\\SupportedPrivilegeSet', $result[200]['{DAV:}supported-privilege-set']);
 
         $server = new DAV\Server();
@@ -98,26 +119,25 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $result = $server->xml->write('{DAV:}root', $prop);
 
         $xpaths = [
-            '/d:root' => 1,
-            '/d:root/d:supported-privilege' => 1,
-            '/d:root/d:supported-privilege/d:privilege' => 1,
-            '/d:root/d:supported-privilege/d:privilege/d:all' => 1,
-            '/d:root/d:supported-privilege/d:abstract' => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege' => 2,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:privilege' => 2,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:privilege/d:read' => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:privilege/d:write' => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege' => 8,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege' => 8,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:read-acl' => 1,
+            '/d:root'                                                                                                                 => 1,
+            '/d:root/d:supported-privilege'                                                                                           => 1,
+            '/d:root/d:supported-privilege/d:privilege'                                                                               => 1,
+            '/d:root/d:supported-privilege/d:privilege/d:all'                                                                         => 1,
+            '/d:root/d:supported-privilege/d:abstract'                                                                                => 0,
+            '/d:root/d:supported-privilege/d:supported-privilege'                                                                     => 2,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:privilege'                                                         => 2,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:privilege/d:read'                                                  => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:privilege/d:write'                                                 => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege'                                               => 7,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege'                                   => 7,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:read-acl'                        => 1,
             '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:read-current-user-privilege-set' => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:write-content' => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:write-properties' => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:write-acl' => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:bind' => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:unbind' => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:unlock' => 1,
-            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:abstract' => 0,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:write-content'                   => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:write-properties'                => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:bind'                            => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:unbind'                          => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:privilege/d:unlock'                          => 1,
+            '/d:root/d:supported-privilege/d:supported-privilege/d:supported-privilege/d:abstract'                                    => 0,
         ];
 
 
@@ -126,10 +146,10 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $dom2->loadXML($result);
 
         $dxpath = new \DOMXPath($dom2);
-        $dxpath->registerNamespace('d','DAV:');
-        foreach($xpaths as $xpath=>$count) {
+        $dxpath->registerNamespace('d', 'DAV:');
+        foreach ($xpaths as $xpath => $count) {
 
-            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : ' . $xpath . ', we could only find ' . $dxpath->query($xpath)->length . ' elements, while we expected ' . $count. ' Full XML: ' . $result);
+            $this->assertEquals($count, $dxpath->query($xpath)->length, 'Looking for : ' . $xpath . ', we could only find ' . $dxpath->query($xpath)->length . ' elements, while we expected ' . $count . ' Full XML: ' . $result);
 
         }
 
@@ -138,6 +158,13 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
     function testACL() {
 
         $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
+        $plugin->setDefaultACL([
+            [
+                'principal' => '{DAV:}all',
+                'privilege' => '{DAV:}all',
+            ],
+        ]);
 
         $nodes = [
             new MockACLNode('foo', [
@@ -147,7 +174,7 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
                 ]
             ]),
             new DAV\SimpleCollection('principals', [
-                $principal = new MockPrincipal('admin','principals/admin'),
+                $principal = new MockPrincipal('admin', 'principals/admin'),
             ]),
 
         ];
@@ -167,8 +194,8 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $result = $server->getPropertiesForPath('foo', $requestedProperties);
         $result = $result[0];
 
-        $this->assertEquals(1,count($result[200]),'The {DAV:}acl property did not return from the list. Full list: ' . print_r($result, true));
-        $this->assertArrayHasKey('{DAV:}acl',$result[200]);
+        $this->assertEquals(1, count($result[200]), 'The {DAV:}acl property did not return from the list. Full list: ' . print_r($result, true));
+        $this->assertArrayHasKey('{DAV:}acl', $result[200]);
         $this->assertInstanceOf('Sabre\\DAVACL\\Xml\Property\\Acl', $result[200]['{DAV:}acl']);
 
     }
@@ -176,6 +203,7 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
     function testACLRestrictions() {
 
         $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
 
         $nodes = [
             new MockACLNode('foo', [
@@ -185,7 +213,7 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
                 ]
             ]),
             new DAV\SimpleCollection('principals', [
-                $principal = new MockPrincipal('admin','principals/admin'),
+                $principal = new MockPrincipal('admin', 'principals/admin'),
             ]),
 
         ];
@@ -205,8 +233,8 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         $result = $server->getPropertiesForPath('foo', $requestedProperties);
         $result = $result[0];
 
-        $this->assertEquals(1,count($result[200]),'The {DAV:}acl-restrictions property did not return from the list. Full list: ' . print_r($result, true));
-        $this->assertArrayHasKey('{DAV:}acl-restrictions',$result[200]);
+        $this->assertEquals(1, count($result[200]), 'The {DAV:}acl-restrictions property did not return from the list. Full list: ' . print_r($result, true));
+        $this->assertArrayHasKey('{DAV:}acl-restrictions', $result[200]);
         $this->assertInstanceOf('Sabre\\DAVACL\\Xml\\Property\\AclRestrictions', $result[200]['{DAV:}acl-restrictions']);
 
     }
@@ -215,7 +243,7 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
 
         $tree = [
             new DAV\SimpleCollection('principals', [
-                $principal = new MockPrincipal('user','principals/user'),
+                $principal = new MockPrincipal('user', 'principals/user'),
             ])
         ];
 
@@ -223,6 +251,13 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         //$plugin = new DAV\Auth\Plugin(new DAV\Auth\MockBackend())
         //$fakeServer->addPlugin($plugin);
         $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
+        $plugin->setDefaultACL([
+            [
+                'principal' => '{DAV:}all',
+                'privilege' => '{DAV:}all',
+            ],
+        ]);
         $fakeServer->addPlugin($plugin);
 
         $requestedProperties = [
@@ -243,7 +278,7 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
 
         $tree = [
             new DAV\SimpleCollection('principals', [
-                $principal = new MockPrincipal('user','principals/user'),
+                $principal = new MockPrincipal('user', 'principals/user'),
             ]),
         ];
 
@@ -251,6 +286,13 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         //$plugin = new DAV\Auth\Plugin(new DAV\Auth\MockBackend());
         //$fakeServer->addPlugin($plugin);
         $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
+        $plugin->setDefaultACL([
+            [
+                'principal' => '{DAV:}all',
+                'privilege' => '{DAV:}all',
+            ],
+        ]);
         $fakeServer->addPlugin($plugin);
 
         $requestedProperties = [
@@ -272,7 +314,7 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
 
         $tree = [
             new DAV\SimpleCollection('principals', [
-                $principal = new MockPrincipal('user','principals/user'),
+                $principal = new MockPrincipal('user', 'principals/user'),
             ]),
         ];
 
@@ -280,6 +322,13 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
         //$plugin = new DAV\Auth\Plugin(new DAV\Auth\MockBackend());
         //$fakeServer->addPlugin($plugin);
         $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
+        $plugin->setDefaultACL([
+            [
+                'principal' => '{DAV:}all',
+                'privilege' => '{DAV:}all',
+            ],
+        ]);
         $fakeServer->addPlugin($plugin);
 
         $requestedProperties = [
@@ -301,13 +350,20 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
 
         $tree = [
             new DAV\SimpleCollection('principals', [
-                $principal = new MockPrincipal('user','principals/user'),
+                $principal = new MockPrincipal('user', 'principals/user'),
             ]),
         ];
 
         $fakeServer = new DAV\Server($tree);
         $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
         $fakeServer->addPlugin($plugin);
+        $plugin->setDefaultACL([
+            [
+                'principal' => '{DAV:}all',
+                'privilege' => '{DAV:}all',
+            ],
+        ]);
 
         $requestedProperties = [
             '{DAV:}group-membership',
@@ -328,13 +384,20 @@ class PluginPropertiesTest extends \PHPUnit_Framework_TestCase {
 
         $tree = [
             new DAV\SimpleCollection('principals', [
-                $principal = new MockPrincipal('user','principals/user'),
+                $principal = new MockPrincipal('user', 'principals/user'),
             ]),
         ];
 
         $fakeServer = new DAV\Server($tree);
         $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
         $fakeServer->addPlugin($plugin);
+        $plugin->setDefaultACL([
+            [
+                'principal' => '{DAV:}all',
+                'privilege' => '{DAV:}all',
+            ],
+        ]);
 
         $requestedProperties = [
             '{DAV:}displayname',
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PluginUpdatePropertiesTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PluginUpdatePropertiesTest.php
index 64cedd142..0147e6a61 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PluginUpdatePropertiesTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PluginUpdatePropertiesTest.php
@@ -3,28 +3,25 @@
 namespace Sabre\DAVACL;
 
 use Sabre\DAV;
-use Sabre\HTTP;
-
-
-require_once 'Sabre/DAVACL/MockPrincipal.php';
 
 class PluginUpdatePropertiesTest extends \PHPUnit_Framework_TestCase {
 
     function testUpdatePropertiesPassthrough() {
 
-        $tree = array(
+        $tree = [
             new DAV\SimpleCollection('foo'),
-        );
+        ];
         $server = new DAV\Server($tree);
+        $server->addPlugin(new DAV\Auth\Plugin());
         $server->addPlugin(new Plugin());
 
-        $result = $server->updateProperties('foo', array(
+        $result = $server->updateProperties('foo', [
             '{DAV:}foo' => 'bar',
-        ));
+        ]);
 
-        $expected = array(
+        $expected = [
             '{DAV:}foo' => 403,
-        );
+        ];
 
         $this->assertEquals($expected, $result);
 
@@ -32,35 +29,39 @@ class PluginUpdatePropertiesTest extends \PHPUnit_Framework_TestCase {
 
     function testRemoveGroupMembers() {
 
-        $tree = array(
-            new MockPrincipal('foo','foo'),
-        );
+        $tree = [
+            new MockPrincipal('foo', 'foo'),
+        ];
         $server = new DAV\Server($tree);
-        $server->addPlugin(new Plugin());
+        $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
+        $server->addPlugin($plugin);
 
-        $result = $server->updateProperties('foo', array(
+        $result = $server->updateProperties('foo', [
             '{DAV:}group-member-set' => null,
-        ));
+        ]);
 
-        $expected = array(
+        $expected = [
             '{DAV:}group-member-set' => 204
-        );
+        ];
 
         $this->assertEquals($expected, $result);
-        $this->assertEquals(array(),$tree[0]->getGroupMemberSet());
+        $this->assertEquals([], $tree[0]->getGroupMemberSet());
 
     }
 
     function testSetGroupMembers() {
 
         $tree = [
-            new MockPrincipal('foo','foo'),
+            new MockPrincipal('foo', 'foo'),
         ];
         $server = new DAV\Server($tree);
-        $server->addPlugin(new Plugin());
+        $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
+        $server->addPlugin($plugin);
 
         $result = $server->updateProperties('foo', [
-            '{DAV:}group-member-set' => new DAV\Xml\Property\Href(['/bar','/baz'], true),
+            '{DAV:}group-member-set' => new DAV\Xml\Property\Href(['/bar', '/baz'], true),
         ]);
 
         $expected = [
@@ -68,7 +69,7 @@ class PluginUpdatePropertiesTest extends \PHPUnit_Framework_TestCase {
         ];
 
         $this->assertEquals($expected, $result);
-        $this->assertEquals(['bar', 'baz'],$tree[0]->getGroupMemberSet());
+        $this->assertEquals(['bar', 'baz'], $tree[0]->getGroupMemberSet());
 
     }
 
@@ -77,15 +78,17 @@ class PluginUpdatePropertiesTest extends \PHPUnit_Framework_TestCase {
      */
     function testSetBadValue() {
 
-        $tree = array(
-            new MockPrincipal('foo','foo'),
-        );
+        $tree = [
+            new MockPrincipal('foo', 'foo'),
+        ];
         $server = new DAV\Server($tree);
-        $server->addPlugin(new Plugin());
+        $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
+        $server->addPlugin($plugin);
 
-        $result = $server->updateProperties('foo', array(
+        $result = $server->updateProperties('foo', [
             '{DAV:}group-member-set' => new \StdClass(),
-        ));
+        ]);
 
     }
 
@@ -95,10 +98,12 @@ class PluginUpdatePropertiesTest extends \PHPUnit_Framework_TestCase {
             new DAV\SimpleCollection('foo'),
         ];
         $server = new DAV\Server($tree);
-        $server->addPlugin(new Plugin());
+        $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
+        $server->addPlugin($plugin);
 
         $result = $server->updateProperties('foo', [
-            '{DAV:}group-member-set' => new DAV\Xml\Property\Href(['/bar','/baz'],false),
+            '{DAV:}group-member-set' => new DAV\Xml\Property\Href(['/bar', '/baz'], false),
         ]);
 
         $expected = [
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/AbstractPDOTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/AbstractPDOTest.php
index 3814ebc0d..9fef3018d 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/AbstractPDOTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/AbstractPDOTest.php
@@ -5,10 +5,24 @@ namespace Sabre\DAVACL\PrincipalBackend;
 use Sabre\DAV;
 use Sabre\HTTP;
 
-
 abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
-    abstract function getPDO();
+    use DAV\DbTestHelperTrait;
+
+    function setUp() {
+
+        $this->dropTables(['principals', 'groupmembers']);
+        $this->createSchema('principals');
+
+        $pdo = $this->getPDO();
+
+        $pdo->query("INSERT INTO principals (uri,email,displayname) VALUES ('principals/user','user@example.org','User')");
+        $pdo->query("INSERT INTO principals (uri,email,displayname) VALUES ('principals/group','group@example.org','Group')");
+
+        $pdo->query("INSERT INTO groupmembers (principal_id,member_id) VALUES (5,4)");
+
+    }
+
 
     function testConstruct() {
 
@@ -26,21 +40,26 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
 
-        $expected = array(
-            array(
-                'uri' => 'principals/user',
+        $expected = [
+            [
+                'uri'                                   => 'principals/admin',
+                '{http://sabredav.org/ns}email-address' => 'admin@example.org',
+                '{DAV:}displayname'                     => 'Administrator',
+            ],
+            [
+                'uri'                                   => 'principals/user',
                 '{http://sabredav.org/ns}email-address' => 'user@example.org',
-                '{DAV:}displayname' => 'User',
-            ),
-            array(
-                'uri' => 'principals/group',
+                '{DAV:}displayname'                     => 'User',
+            ],
+            [
+                'uri'                                   => 'principals/group',
                 '{http://sabredav.org/ns}email-address' => 'group@example.org',
-                '{DAV:}displayname' => 'Group',
-            ),
-        );
+                '{DAV:}displayname'                     => 'Group',
+            ],
+        ];
 
         $this->assertEquals($expected, $backend->getPrincipalsByPrefix('principals'));
-        $this->assertEquals(array(), $backend->getPrincipalsByPrefix('foo'));
+        $this->assertEquals([], $backend->getPrincipalsByPrefix('foo'));
 
     }
 
@@ -52,12 +71,12 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
 
-        $expected = array(
-            'id' => 1,
-            'uri' => 'principals/user',
+        $expected = [
+            'id'                                    => 4,
+            'uri'                                   => 'principals/user',
             '{http://sabredav.org/ns}email-address' => 'user@example.org',
-            '{DAV:}displayname' => 'User',
-        );
+            '{DAV:}displayname'                     => 'User',
+        ];
 
         $this->assertEquals($expected, $backend->getPrincipalByPath('principals/user'));
         $this->assertEquals(null, $backend->getPrincipalByPath('foo'));
@@ -68,9 +87,9 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
-        $expected = array('principals/user');
+        $expected = ['principals/user'];
 
-        $this->assertEquals($expected,$backend->getGroupMemberSet('principals/group'));
+        $this->assertEquals($expected, $backend->getGroupMemberSet('principals/group'));
 
     }
 
@@ -78,9 +97,9 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $pdo = $this->getPDO();
         $backend = new PDO($pdo);
-        $expected = array('principals/group');
+        $expected = ['principals/group'];
 
-        $this->assertEquals($expected,$backend->getGroupMembership('principals/user'));
+        $this->assertEquals($expected, $backend->getGroupMembership('principals/user'));
 
     }
 
@@ -90,15 +109,15 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         // Start situation
         $backend = new PDO($pdo);
-        $this->assertEquals(array('principals/user'), $backend->getGroupMemberSet('principals/group'));
+        $this->assertEquals(['principals/user'], $backend->getGroupMemberSet('principals/group'));
 
         // Removing all principals
-        $backend->setGroupMemberSet('principals/group', array());
-        $this->assertEquals(array(), $backend->getGroupMemberSet('principals/group'));
+        $backend->setGroupMemberSet('principals/group', []);
+        $this->assertEquals([], $backend->getGroupMemberSet('principals/group'));
 
         // Adding principals again
-        $backend->setGroupMemberSet('principals/group', array('principals/user'));
-        $this->assertEquals(array('principals/user'), $backend->getGroupMemberSet('principals/group'));
+        $backend->setGroupMemberSet('principals/group', ['principals/user']);
+        $this->assertEquals(['principals/user'], $backend->getGroupMemberSet('principals/group'));
 
 
     }
@@ -109,17 +128,17 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $backend = new PDO($pdo);
 
-        $result = $backend->searchPrincipals('principals', array('{DAV:}blabla' => 'foo'));
-        $this->assertEquals(array(), $result);
+        $result = $backend->searchPrincipals('principals', ['{DAV:}blabla' => 'foo']);
+        $this->assertEquals([], $result);
 
-        $result = $backend->searchPrincipals('principals', array('{DAV:}displayname' => 'ou'));
-        $this->assertEquals(array('principals/group'), $result);
+        $result = $backend->searchPrincipals('principals', ['{DAV:}displayname' => 'ou']);
+        $this->assertEquals(['principals/group'], $result);
 
-        $result = $backend->searchPrincipals('principals', array('{DAV:}displayname' => 'UsEr', '{http://sabredav.org/ns}email-address' => 'USER@EXAMPLE'));
-        $this->assertEquals(array('principals/user'), $result);
+        $result = $backend->searchPrincipals('principals', ['{DAV:}displayname' => 'UsEr', '{http://sabredav.org/ns}email-address' => 'USER@EXAMPLE']);
+        $this->assertEquals(['principals/user'], $result);
 
-        $result = $backend->searchPrincipals('mom', array('{DAV:}displayname' => 'UsEr', '{http://sabredav.org/ns}email-address' => 'USER@EXAMPLE'));
-        $this->assertEquals(array(), $result);
+        $result = $backend->searchPrincipals('mom', ['{DAV:}displayname' => 'UsEr', '{http://sabredav.org/ns}email-address' => 'USER@EXAMPLE']);
+        $this->assertEquals([], $result);
 
     }
 
@@ -137,12 +156,12 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertTrue($result);
 
-        $this->assertEquals(array(
-            'id' => 1,
-            'uri' => 'principals/user',
-            '{DAV:}displayname' => 'pietje',
+        $this->assertEquals([
+            'id'                                    => 4,
+            'uri'                                   => 'principals/user',
+            '{DAV:}displayname'                     => 'pietje',
             '{http://sabredav.org/ns}email-address' => 'user@example.org',
-        ), $backend->getPrincipalByPath('principals/user'));
+        ], $backend->getPrincipalByPath('principals/user'));
 
     }
 
@@ -153,7 +172,7 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $propPatch = new DAV\PropPatch([
             '{DAV:}displayname' => 'pietje',
-            '{DAV:}unknown' => 'foo',
+            '{DAV:}unknown'     => 'foo',
         ]);
 
         $backend->updatePrincipal('principals/user', $propPatch);
@@ -161,17 +180,17 @@ abstract class AbstractPDOTest extends \PHPUnit_Framework_TestCase {
 
         $this->assertFalse($result);
 
-        $this->assertEquals(array(
+        $this->assertEquals([
             '{DAV:}displayname' => 424,
-            '{DAV:}unknown' => 403
-        ), $propPatch->getResult());
+            '{DAV:}unknown'     => 403
+        ], $propPatch->getResult());
 
-        $this->assertEquals(array(
-            'id' => '1',
-            'uri' => 'principals/user',
-            '{DAV:}displayname' => 'User',
+        $this->assertEquals([
+            'id'                                    => '4',
+            'uri'                                   => 'principals/user',
+            '{DAV:}displayname'                     => 'User',
             '{http://sabredav.org/ns}email-address' => 'user@example.org',
-        ), $backend->getPrincipalByPath('principals/user'));
+        ], $backend->getPrincipalByPath('principals/user'));
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOMySQLTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOMySQLTest.php
index 83353c86c..8779eb69f 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOMySQLTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOMySQLTest.php
@@ -2,49 +2,8 @@
 
 namespace Sabre\DAVACL\PrincipalBackend;
 
-use Sabre\DAV;
-use Sabre\HTTP;
-
-
-require_once 'Sabre/TestUtil.php';
-
 class PDOMySQLTest extends AbstractPDOTest {
 
-    function getPDO() {
-
-        if (!SABRE_HASMYSQL) $this->markTestSkipped('MySQL driver is not available, or not properly configured');
-        $pdo = \Sabre\TestUtil::getMySQLDB();
-        if (!$pdo) $this->markTestSkipped('Could not connect to MySQL database');
-        $pdo->query("DROP TABLE IF EXISTS principals");
-        $pdo->query(<<<SQL
-create table principals (
-  id integer unsigned not null primary key auto_increment,
-  uri varchar(50),
-  email varchar(80),
-  displayname VARCHAR(80),
-  vcardurl VARCHAR(80),
-  unique(uri)
-)
-SQL
-        );
-
-        $pdo->query("INSERT INTO principals (uri,email,displayname) VALUES ('principals/user','user@example.org','User')");
-        $pdo->query("INSERT INTO principals (uri,email,displayname) VALUES ('principals/group','group@example.org','Group')");
-        $pdo->query("DROP TABLE IF EXISTS groupmembers");
-        $pdo->query(<<<SQL
-CREATE TABLE groupmembers (
-  id INTEGER UNSIGNED NOT NULL PRIMARY KEY AUTO_INCREMENT,
-  principal_id INTEGER UNSIGNED NOT NULL,
-  member_id INTEGER UNSIGNED NOT NULL,
-  UNIQUE(principal_id, member_id)
-)
-SQL
-        );
-
-        $pdo->query("INSERT INTO groupmembers (principal_id,member_id) VALUES (2,1)");
-
-        return $pdo;
-
-    }
+    public $driver = 'mysql';
 
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOSqliteTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOSqliteTest.php
index f335ed51f..48454981d 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOSqliteTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalBackend/PDOSqliteTest.php
@@ -2,44 +2,8 @@
 
 namespace Sabre\DAVACL\PrincipalBackend;
 
-use Sabre\DAV;
-use Sabre\HTTP;
+class PDOSqliteTest extends AbstractPDOTest {
 
-
-require_once 'Sabre/DAV/Auth/Backend/AbstractPDOTest.php';
-
-class PDOSQLiteTest extends AbstractPDOTest {
-
-    function tearDown() {
-
-        if (file_exists(SABRE_TEMPDIR . '/pdobackend')) unlink(SABRE_TEMPDIR . '/pdobackend');
-        if (file_exists(SABRE_TEMPDIR . '/pdobackend2')) unlink(SABRE_TEMPDIR . '/pdobackend2');
-
-    }
-
-    function getPDO() {
-
-        if (!SABRE_HASSQLITE) $this->markTestSkipped('SQLite driver is not available');
-        $pdo = new \PDO('sqlite:'.SABRE_TEMPDIR.'/pdobackend');
-        $pdo->setAttribute(\PDO::ATTR_ERRMODE,\PDO::ERRMODE_EXCEPTION);
-        $pdo->query('CREATE TABLE principals (id INTEGER PRIMARY KEY ASC, uri TEXT, email VARCHAR(80), displayname VARCHAR(80))');
-        $pdo->query('INSERT INTO principals VALUES (1, "principals/user","user@example.org","User")');
-        $pdo->query('INSERT INTO principals VALUES (2, "principals/group","group@example.org","Group")');
-
-        $pdo->query(<<<SQL
-CREATE TABLE groupmembers (
-  id INTEGER PRIMARY KEY ASC,
-  principal_id INT,
-  member_id INT,
-  UNIQUE(principal_id, member_id)
-)
-SQL
-        );
-
-        $pdo->query("INSERT INTO groupmembers (principal_id,member_id) VALUES (2,1)");
-
-        return $pdo;
-
-    }
+    public $driver = 'sqlite';
 
 }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalCollectionTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalCollectionTest.php
index f51d2dcce..bcf78821b 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalCollectionTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalCollectionTest.php
@@ -2,26 +2,22 @@
 
 namespace Sabre\DAVACL;
 
-use Sabre\DAV;
-use Sabre\HTTP;
-
-
 class PrincipalCollectionTest extends \PHPUnit_Framework_TestCase {
 
-    public function testBasic() {
+    function testBasic() {
 
         $backend = new PrincipalBackend\Mock();
         $pc = new PrincipalCollection($backend);
         $this->assertTrue($pc instanceof PrincipalCollection);
 
-        $this->assertEquals('principals',$pc->getName());
+        $this->assertEquals('principals', $pc->getName());
 
     }
 
     /**
      * @depends testBasic
      */
-    public function testGetChildren() {
+    function testGetChildren() {
 
         $backend = new PrincipalBackend\Mock();
         $pc = new PrincipalCollection($backend);
@@ -29,7 +25,7 @@ class PrincipalCollectionTest extends \PHPUnit_Framework_TestCase {
         $children = $pc->getChildren();
         $this->assertTrue(is_array($children));
 
-        foreach($children as $child) {
+        foreach ($children as $child) {
             $this->assertTrue($child instanceof IPrincipal);
         }
 
@@ -39,7 +35,7 @@ class PrincipalCollectionTest extends \PHPUnit_Framework_TestCase {
      * @depends testBasic
      * @expectedException Sabre\DAV\Exception\MethodNotAllowed
      */
-    public function testGetChildrenDisable() {
+    function testGetChildrenDisable() {
 
         $backend = new PrincipalBackend\Mock();
         $pc = new PrincipalCollection($backend);
@@ -49,7 +45,7 @@ class PrincipalCollectionTest extends \PHPUnit_Framework_TestCase {
 
     }
 
-    public function testFindByUri() {
+    function testFindByUri() {
 
         $backend = new PrincipalBackend\Mock();
         $pc = new PrincipalCollection($backend);
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalPropertySearchTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalPropertySearchTest.php
index 8e4c86782..60e156d9a 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalPropertySearchTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalPropertySearchTest.php
@@ -23,6 +23,7 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $fakeServer->debugExceptions = true;
         $plugin = new MockPlugin();
         $plugin->allowAccessToNodesWithoutACL = true;
+        $plugin->allowUnauthenticatedAccess = false;
 
         $this->assertTrue($plugin instanceof Plugin);
         $fakeServer->addPlugin($plugin);
@@ -48,11 +49,11 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
   </d:prop>
 </d:principal-property-search>';
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
             'HTTP_DEPTH'     => '1',
             'REQUEST_URI'    => '/principals',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody($xml);
@@ -63,10 +64,10 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(400, $server->httpResponse->getStatus(), $server->httpResponse->getBodyAsString());
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ), $server->httpResponse->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $server->httpResponse->getHeaders());
 
     }
 
@@ -87,11 +88,11 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
   </d:prop>
 </d:principal-property-search>';
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
             'HTTP_DEPTH'     => '0',
             'REQUEST_URI'    => '/principals',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody($xml);
@@ -102,11 +103,11 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(207, $server->httpResponse->getStatus(), "Full body: " . $server->httpResponse->getBodyAsString());
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-            'Vary'         => ['Brief,Prefer'],
-        ), $server->httpResponse->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Vary'            => ['Brief,Prefer'],
+        ], $server->httpResponse->getHeaders());
 
     }
 
@@ -127,11 +128,11 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
   </d:prop>
 </d:principal-property-search>';
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
             'HTTP_DEPTH'     => '0',
             'REQUEST_URI'    => '/',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody($xml);
@@ -142,36 +143,36 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(207, $server->httpResponse->status, $server->httpResponse->body);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-            'Vary'         => ['Brief,Prefer'],
-        ), $server->httpResponse->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Vary'            => ['Brief,Prefer'],
+        ], $server->httpResponse->getHeaders());
 
 
-        $check = array(
+        $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response' => 2,
-            '/d:multistatus/d:response/d:href' => 2,
-            '/d:multistatus/d:response/d:propstat' => 4,
-            '/d:multistatus/d:response/d:propstat/d:prop' => 4,
-            '/d:multistatus/d:response/d:propstat/d:prop/d:displayname' => 2,
+            '/d:multistatus/d:response'                                      => 2,
+            '/d:multistatus/d:response/d:href'                               => 2,
+            '/d:multistatus/d:response/d:propstat'                           => 4,
+            '/d:multistatus/d:response/d:propstat/d:prop'                    => 4,
+            '/d:multistatus/d:response/d:propstat/d:prop/d:displayname'      => 2,
             '/d:multistatus/d:response/d:propstat/d:prop/d:getcontentlength' => 2,
-            '/d:multistatus/d:response/d:propstat/d:status' => 4,
-        );
+            '/d:multistatus/d:response/d:propstat/d:status'                  => 4,
+        ];
 
         $xml = simplexml_load_string($server->httpResponse->body);
-        $xml->registerXPathNamespace('d','DAV:');
-        foreach($check as $v1=>$v2) {
+        $xml->registerXPathNamespace('d', 'DAV:');
+        foreach ($check as $v1 => $v2) {
 
-            $xpath = is_int($v1)?$v2:$v1;
+            $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
             if (!is_int($v1)) $count = $v2;
 
-            $this->assertEquals($count,count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
+            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
 
         }
 
@@ -200,11 +201,11 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
   </d:prop>
 </d:principal-property-search>';
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
             'HTTP_DEPTH'     => '0',
             'REQUEST_URI'    => '/',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody($xml);
@@ -215,36 +216,36 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(207, $server->httpResponse->status, $server->httpResponse->body);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-            'Vary'         => ['Brief,Prefer'],
-        ), $server->httpResponse->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Vary'            => ['Brief,Prefer'],
+        ], $server->httpResponse->getHeaders());
 
 
-        $check = array(
+        $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response' => 0,
-            '/d:multistatus/d:response/d:href' => 0,
-            '/d:multistatus/d:response/d:propstat' => 0,
-            '/d:multistatus/d:response/d:propstat/d:prop' => 0,
-            '/d:multistatus/d:response/d:propstat/d:prop/d:displayname' => 0,
+            '/d:multistatus/d:response'                                      => 0,
+            '/d:multistatus/d:response/d:href'                               => 0,
+            '/d:multistatus/d:response/d:propstat'                           => 0,
+            '/d:multistatus/d:response/d:propstat/d:prop'                    => 0,
+            '/d:multistatus/d:response/d:propstat/d:prop/d:displayname'      => 0,
             '/d:multistatus/d:response/d:propstat/d:prop/d:getcontentlength' => 0,
-            '/d:multistatus/d:response/d:propstat/d:status' => 0,
-        );
+            '/d:multistatus/d:response/d:propstat/d:status'                  => 0,
+        ];
 
         $xml = simplexml_load_string($server->httpResponse->body);
-        $xml->registerXPathNamespace('d','DAV:');
-        foreach($check as $v1=>$v2) {
+        $xml->registerXPathNamespace('d', 'DAV:');
+        foreach ($check as $v1 => $v2) {
 
-            $xpath = is_int($v1)?$v2:$v1;
+            $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
             if (!is_int($v1)) $count = $v2;
 
-            $this->assertEquals($count,count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
+            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
 
         }
 
@@ -272,11 +273,11 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
   </d:prop>
 </d:principal-property-search>';
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
             'HTTP_DEPTH'     => '0',
             'REQUEST_URI'    => '/',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody($xml);
@@ -287,36 +288,36 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(207, $server->httpResponse->status, $server->httpResponse->body);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-            'Vary'         => ['Brief,Prefer'],
-        ), $server->httpResponse->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Vary'            => ['Brief,Prefer'],
+        ], $server->httpResponse->getHeaders());
 
 
-        $check = array(
+        $check = [
             '/d:multistatus',
-            '/d:multistatus/d:response' => 2,
-            '/d:multistatus/d:response/d:href' => 2,
-            '/d:multistatus/d:response/d:propstat' => 4,
-            '/d:multistatus/d:response/d:propstat/d:prop' => 4,
-            '/d:multistatus/d:response/d:propstat/d:prop/d:displayname' => 2,
+            '/d:multistatus/d:response'                                      => 2,
+            '/d:multistatus/d:response/d:href'                               => 2,
+            '/d:multistatus/d:response/d:propstat'                           => 4,
+            '/d:multistatus/d:response/d:propstat/d:prop'                    => 4,
+            '/d:multistatus/d:response/d:propstat/d:prop/d:displayname'      => 2,
             '/d:multistatus/d:response/d:propstat/d:prop/d:getcontentlength' => 2,
-            '/d:multistatus/d:response/d:propstat/d:status' => 4,
-        );
+            '/d:multistatus/d:response/d:propstat/d:status'                  => 4,
+        ];
 
         $xml = simplexml_load_string($server->httpResponse->body);
-        $xml->registerXPathNamespace('d','DAV:');
-        foreach($check as $v1=>$v2) {
+        $xml->registerXPathNamespace('d', 'DAV:');
+        foreach ($check as $v1 => $v2) {
 
-            $xpath = is_int($v1)?$v2:$v1;
+            $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
             if (!is_int($v1)) $count = $v2;
 
-            $this->assertEquals($count,count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
+            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
 
         }
 
@@ -337,11 +338,11 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
   </d:prop>
 </d:principal-property-search>';
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
             'HTTP_DEPTH'     => '0',
             'REQUEST_URI'    => '/',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody($xml);
@@ -352,30 +353,30 @@ class PrincipalPropertySearchTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(207, $server->httpResponse->status, $server->httpResponse->body);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-            'Vary'         => ['Brief,Prefer'],
-        ), $server->httpResponse->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+            'Vary'            => ['Brief,Prefer'],
+        ], $server->httpResponse->getHeaders());
 
 
-        $check = array(
+        $check = [
             '/d:multistatus',
             '/d:multistatus/d:response' => 0,
-        );
+        ];
 
         $xml = simplexml_load_string($server->httpResponse->body);
-        $xml->registerXPathNamespace('d','DAV:');
-        foreach($check as $v1=>$v2) {
+        $xml->registerXPathNamespace('d', 'DAV:');
+        foreach ($check as $v1 => $v2) {
 
-            $xpath = is_int($v1)?$v2:$v1;
+            $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
             if (!is_int($v1)) $count = $v2;
 
-            $this->assertEquals($count,count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
+            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
 
         }
 
@@ -386,10 +387,10 @@ class MockPlugin extends Plugin {
 
     function getCurrentUserPrivilegeSet($node) {
 
-        return array(
+        return [
             '{DAV:}read',
             '{DAV:}write',
-        );
+        ];
 
     }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalSearchPropertySetTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalSearchPropertySetTest.php
index 952dc174a..fa1314d10 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalSearchPropertySetTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalSearchPropertySetTest.php
@@ -21,6 +21,7 @@ class PrincipalSearchPropertySetTest extends \PHPUnit_Framework_TestCase {
         $fakeServer->sapi = new HTTP\SapiMock();
         $fakeServer->httpResponse = new HTTP\ResponseMock();
         $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
         $this->assertTrue($plugin instanceof Plugin);
         $fakeServer->addPlugin($plugin);
         $this->assertEquals($plugin, $fakeServer->getPlugin('acl'));
@@ -34,11 +35,11 @@ class PrincipalSearchPropertySetTest extends \PHPUnit_Framework_TestCase {
         $xml = '<?xml version="1.0"?>
 <d:principal-search-property-set xmlns:d="DAV:" />';
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
             'HTTP_DEPTH'     => '1',
             'REQUEST_URI'    => '/principals',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody($xml);
@@ -49,10 +50,10 @@ class PrincipalSearchPropertySetTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(400, $server->httpResponse->status);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ), $server->httpResponse->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $server->httpResponse->getHeaders());
 
     }
 
@@ -61,11 +62,11 @@ class PrincipalSearchPropertySetTest extends \PHPUnit_Framework_TestCase {
         $xml = '<?xml version="1.0"?>
 <d:principal-search-property-set xmlns:d="DAV:"><d:ohell /></d:principal-search-property-set>';
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
             'HTTP_DEPTH'     => '0',
             'REQUEST_URI'    => '/principals',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody($xml);
@@ -76,10 +77,10 @@ class PrincipalSearchPropertySetTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(400, $server->httpResponse->status, $server->httpResponse->body);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ), $server->httpResponse->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $server->httpResponse->getHeaders());
 
     }
 
@@ -88,11 +89,11 @@ class PrincipalSearchPropertySetTest extends \PHPUnit_Framework_TestCase {
         $xml = '<?xml version="1.0"?>
 <d:principal-search-property-set xmlns:d="DAV:"/>';
 
-        $serverVars = array(
+        $serverVars = [
             'REQUEST_METHOD' => 'REPORT',
             'HTTP_DEPTH'     => '0',
             'REQUEST_URI'    => '/principals',
-        );
+        ];
 
         $request = HTTP\Sapi::createFromServerArray($serverVars);
         $request->setBody($xml);
@@ -103,34 +104,34 @@ class PrincipalSearchPropertySetTest extends \PHPUnit_Framework_TestCase {
         $server->exec();
 
         $this->assertEquals(200, $server->httpResponse->status, $server->httpResponse->body);
-        $this->assertEquals(array(
+        $this->assertEquals([
             'X-Sabre-Version' => [DAV\Version::VERSION],
-            'Content-Type' => ['application/xml; charset=utf-8'],
-        ), $server->httpResponse->getHeaders());
+            'Content-Type'    => ['application/xml; charset=utf-8'],
+        ], $server->httpResponse->getHeaders());
 
 
-        $check = array(
+        $check = [
             '/d:principal-search-property-set',
-            '/d:principal-search-property-set/d:principal-search-property' => 2,
-            '/d:principal-search-property-set/d:principal-search-property/d:prop' => 2,
-            '/d:principal-search-property-set/d:principal-search-property/d:prop/d:displayname' => 1,
+            '/d:principal-search-property-set/d:principal-search-property'                        => 2,
+            '/d:principal-search-property-set/d:principal-search-property/d:prop'                 => 2,
+            '/d:principal-search-property-set/d:principal-search-property/d:prop/d:displayname'   => 1,
             '/d:principal-search-property-set/d:principal-search-property/d:prop/s:email-address' => 1,
-            '/d:principal-search-property-set/d:principal-search-property/d:description' => 2,
-        );
+            '/d:principal-search-property-set/d:principal-search-property/d:description'          => 2,
+        ];
 
         $xml = simplexml_load_string($server->httpResponse->body);
-        $xml->registerXPathNamespace('d','DAV:');
-        $xml->registerXPathNamespace('s','http://sabredav.org/ns');
-        foreach($check as $v1=>$v2) {
+        $xml->registerXPathNamespace('d', 'DAV:');
+        $xml->registerXPathNamespace('s', 'http://sabredav.org/ns');
+        foreach ($check as $v1 => $v2) {
 
-            $xpath = is_int($v1)?$v2:$v1;
+            $xpath = is_int($v1) ? $v2 : $v1;
 
             $result = $xml->xpath($xpath);
 
             $count = 1;
             if (!is_int($v1)) $count = $v2;
 
-            $this->assertEquals($count,count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
+            $this->assertEquals($count, count($result), 'we expected ' . $count . ' appearances of ' . $xpath . ' . We found ' . count($result) . '. Full response body: ' . $server->httpResponse->body);
 
         }
 
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalTest.php
index 03fd9d64d..20622ad17 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/PrincipalTest.php
@@ -7,10 +7,10 @@ use Sabre\HTTP;
 
 class PrincipalTest extends \PHPUnit_Framework_TestCase {
 
-    public function testConstruct() {
+    function testConstruct() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array('uri' => 'principals/admin'));
+        $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $this->assertTrue($principal instanceof Principal);
 
     }
@@ -18,65 +18,65 @@ class PrincipalTest extends \PHPUnit_Framework_TestCase {
     /**
      * @expectedException Sabre\DAV\Exception
      */
-    public function testConstructNoUri() {
+    function testConstructNoUri() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array());
+        $principal = new Principal($principalBackend, []);
 
     }
 
-    public function testGetName() {
+    function testGetName() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array('uri' => 'principals/admin'));
-        $this->assertEquals('admin',$principal->getName());
+        $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
+        $this->assertEquals('admin', $principal->getName());
 
     }
 
-    public function testGetDisplayName() {
+    function testGetDisplayName() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array('uri' => 'principals/admin'));
-        $this->assertEquals('admin',$principal->getDisplayname());
+        $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
+        $this->assertEquals('admin', $principal->getDisplayname());
 
-        $principal = new Principal($principalBackend, array(
-            'uri' => 'principals/admin',
+        $principal = new Principal($principalBackend, [
+            'uri'               => 'principals/admin',
             '{DAV:}displayname' => 'Mr. Admin'
-        ));
-        $this->assertEquals('Mr. Admin',$principal->getDisplayname());
+        ]);
+        $this->assertEquals('Mr. Admin', $principal->getDisplayname());
 
     }
 
-    public function testGetProperties() {
+    function testGetProperties() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array(
-            'uri' => 'principals/admin',
-            '{DAV:}displayname' => 'Mr. Admin',
+        $principal = new Principal($principalBackend, [
+            'uri'                                   => 'principals/admin',
+            '{DAV:}displayname'                     => 'Mr. Admin',
             '{http://www.example.org/custom}custom' => 'Custom',
             '{http://sabredav.org/ns}email-address' => 'admin@example.org',
-        ));
+        ]);
 
-        $keys = array(
+        $keys = [
             '{DAV:}displayname',
             '{http://www.example.org/custom}custom',
             '{http://sabredav.org/ns}email-address',
-        );
+        ];
         $props = $principal->getProperties($keys);
 
-        foreach($keys as $key) $this->assertArrayHasKey($key,$props);
+        foreach ($keys as $key) $this->assertArrayHasKey($key, $props);
 
-        $this->assertEquals('Mr. Admin',$props['{DAV:}displayname']);
+        $this->assertEquals('Mr. Admin', $props['{DAV:}displayname']);
 
         $this->assertEquals('admin@example.org', $props['{http://sabredav.org/ns}email-address']);
     }
 
-    public function testUpdateProperties() {
+    function testUpdateProperties() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array('uri' => 'principals/admin'));
+        $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
 
-        $propPatch = new DAV\PropPatch(array('{DAV:}yourmom' => 'test'));
+        $propPatch = new DAV\PropPatch(['{DAV:}yourmom' => 'test']);
 
         $result = $principal->propPatch($propPatch);
         $result = $propPatch->commit();
@@ -84,123 +84,123 @@ class PrincipalTest extends \PHPUnit_Framework_TestCase {
 
     }
 
-    public function testGetPrincipalUrl() {
+    function testGetPrincipalUrl() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array('uri' => 'principals/admin'));
-        $this->assertEquals('principals/admin',$principal->getPrincipalUrl());
+        $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
+        $this->assertEquals('principals/admin', $principal->getPrincipalUrl());
 
     }
 
-    public function testGetAlternateUriSet() {
+    function testGetAlternateUriSet() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array(
-            'uri' => 'principals/admin',
-            '{DAV:}displayname' => 'Mr. Admin',
+        $principal = new Principal($principalBackend, [
+            'uri'                                   => 'principals/admin',
+            '{DAV:}displayname'                     => 'Mr. Admin',
             '{http://www.example.org/custom}custom' => 'Custom',
             '{http://sabredav.org/ns}email-address' => 'admin@example.org',
-            '{DAV:}alternate-URI-set' => array(
+            '{DAV:}alternate-URI-set'               => [
                 'mailto:admin+1@example.org',
                 'mailto:admin+2@example.org',
                 'mailto:admin@example.org',
-            ),
-        ));
+            ],
+        ]);
 
-        $expected = array(
+        $expected = [
             'mailto:admin+1@example.org',
             'mailto:admin+2@example.org',
             'mailto:admin@example.org',
-        );
+        ];
 
-        $this->assertEquals($expected,$principal->getAlternateUriSet());
+        $this->assertEquals($expected, $principal->getAlternateUriSet());
 
     }
-    public function testGetAlternateUriSetEmpty() {
+    function testGetAlternateUriSetEmpty() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array(
+        $principal = new Principal($principalBackend, [
             'uri' => 'principals/admin',
-        ));
+        ]);
 
-        $expected = array();
+        $expected = [];
 
-        $this->assertEquals($expected,$principal->getAlternateUriSet());
+        $this->assertEquals($expected, $principal->getAlternateUriSet());
 
     }
 
-    public function testGetGroupMemberSet() {
+    function testGetGroupMemberSet() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array('uri' => 'principals/admin'));
-        $this->assertEquals(array(),$principal->getGroupMemberSet());
+        $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
+        $this->assertEquals([], $principal->getGroupMemberSet());
 
     }
-    public function testGetGroupMembership() {
+    function testGetGroupMembership() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array('uri' => 'principals/admin'));
-        $this->assertEquals(array(),$principal->getGroupMembership());
+        $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
+        $this->assertEquals([], $principal->getGroupMembership());
 
     }
 
-    public function testSetGroupMemberSet() {
+    function testSetGroupMemberSet() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array('uri' => 'principals/admin'));
-        $principal->setGroupMemberSet(array('principals/foo'));
+        $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
+        $principal->setGroupMemberSet(['principals/foo']);
 
-        $this->assertEquals(array(
-            'principals/admin' => array('principals/foo'),
-        ), $principalBackend->groupMembers);
+        $this->assertEquals([
+            'principals/admin' => ['principals/foo'],
+        ], $principalBackend->groupMembers);
 
     }
 
-    public function testGetOwner() {
+    function testGetOwner() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array('uri' => 'principals/admin'));
-        $this->assertEquals('principals/admin',$principal->getOwner());
+        $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
+        $this->assertEquals('principals/admin', $principal->getOwner());
 
     }
 
-    public function testGetGroup() {
+    function testGetGroup() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array('uri' => 'principals/admin'));
+        $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $this->assertNull($principal->getGroup());
 
     }
 
-    public function testGetACl() {
+    function testGetACl() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array('uri' => 'principals/admin'));
-        $this->assertEquals(array(
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => '{DAV:}authenticated',
+        $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
+        $this->assertEquals([
+            [
+                'privilege' => '{DAV:}all',
+                'principal' => '{DAV:}owner',
                 'protected' => true,
-            )
-        ),$principal->getACL());
+            ]
+        ], $principal->getACL());
 
     }
 
     /**
-     * @expectedException Sabre\DAV\Exception\MethodNotAllowed
+     * @expectedException \Sabre\DAV\Exception\Forbidden
      */
-    public function testSetACl() {
+    function testSetACl() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array('uri' => 'principals/admin'));
-        $principal->setACL(array());
+        $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
+        $principal->setACL([]);
 
     }
 
-    public function testGetSupportedPrivilegeSet() {
+    function testGetSupportedPrivilegeSet() {
 
         $principalBackend = new PrincipalBackend\Mock();
-        $principal = new Principal($principalBackend, array('uri' => 'principals/admin'));
+        $principal = new Principal($principalBackend, ['uri' => 'principals/admin']);
         $this->assertNull($principal->getSupportedPrivilegeSet());
 
     }
diff --git a/vendor/sabre/dav/tests/Sabre/DAVACL/SimplePluginTest.php b/vendor/sabre/dav/tests/Sabre/DAVACL/SimplePluginTest.php
index fb73cc16a..2de0ba6a8 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVACL/SimplePluginTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVACL/SimplePluginTest.php
@@ -5,7 +5,6 @@ namespace Sabre\DAVACL;
 use Sabre\DAV;
 use Sabre\HTTP;
 
-
 require_once 'Sabre/DAVACL/MockPrincipal.php';
 require_once 'Sabre/DAVACL/MockACLNode.php';
 
@@ -14,21 +13,22 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
     function testValues() {
 
         $aclPlugin = new Plugin();
-        $this->assertEquals('acl',$aclPlugin->getPluginName());
+        $this->assertEquals('acl', $aclPlugin->getPluginName());
         $this->assertEquals(
-            array('access-control', 'calendarserver-principal-property-search'),
+            ['access-control', 'calendarserver-principal-property-search'],
             $aclPlugin->getFeatures()
         );
 
         $this->assertEquals(
-            array(
+            [
                 '{DAV:}expand-property',
+                '{DAV:}principal-match',
                 '{DAV:}principal-property-search',
                 '{DAV:}principal-search-property-set'
-            ),
+            ],
             $aclPlugin->getSupportedReportSet(''));
 
-        $this->assertEquals(array('ACL'), $aclPlugin->getMethods(''));
+        $this->assertEquals(['ACL'], $aclPlugin->getMethods(''));
 
 
         $this->assertEquals(
@@ -39,90 +39,84 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
 
     function testGetFlatPrivilegeSet() {
 
-        $expected = array(
-            '{DAV:}all' => array(
-                'privilege' => '{DAV:}all',
-                'abstract' => true,
-                'aggregates' => array(
+        $expected = [
+            '{DAV:}all' => [
+                'privilege'  => '{DAV:}all',
+                'abstract'   => false,
+                'aggregates' => [
                     '{DAV:}read',
                     '{DAV:}write',
-                ),
-                'concrete' => null,
-            ),
-            '{DAV:}read' => array(
-                'privilege' => '{DAV:}read',
-                'abstract' => false,
-                'aggregates' => array(
+                ],
+                'concrete' => '{DAV:}all',
+            ],
+            '{DAV:}read' => [
+                'privilege'  => '{DAV:}read',
+                'abstract'   => false,
+                'aggregates' => [
                     '{DAV:}read-acl',
                     '{DAV:}read-current-user-privilege-set',
-                ),
+                ],
                 'concrete' => '{DAV:}read',
-            ),
-            '{DAV:}read-acl' => array(
-                'privilege' => '{DAV:}read-acl',
-                'abstract' => false,
-                'aggregates' => array(),
-                'concrete' => '{DAV:}read-acl',
-            ),
-            '{DAV:}read-current-user-privilege-set' => array(
-                'privilege' => '{DAV:}read-current-user-privilege-set',
-                'abstract' => false,
-                'aggregates' => array(),
-                'concrete' => '{DAV:}read-current-user-privilege-set',
-            ),
-            '{DAV:}write' => array(
-                'privilege' => '{DAV:}write',
-                'abstract' => false,
-                'aggregates' => array(
-                    '{DAV:}write-acl',
+            ],
+            '{DAV:}read-acl' => [
+                'privilege'  => '{DAV:}read-acl',
+                'abstract'   => false,
+                'aggregates' => [],
+                'concrete'   => '{DAV:}read-acl',
+            ],
+            '{DAV:}read-current-user-privilege-set' => [
+                'privilege'  => '{DAV:}read-current-user-privilege-set',
+                'abstract'   => false,
+                'aggregates' => [],
+                'concrete'   => '{DAV:}read-current-user-privilege-set',
+            ],
+            '{DAV:}write' => [
+                'privilege'  => '{DAV:}write',
+                'abstract'   => false,
+                'aggregates' => [
                     '{DAV:}write-properties',
                     '{DAV:}write-content',
+                    '{DAV:}unlock',
                     '{DAV:}bind',
                     '{DAV:}unbind',
-                    '{DAV:}unlock',
-                ),
+                ],
                 'concrete' => '{DAV:}write',
-            ),
-            '{DAV:}write-acl' => array(
-                'privilege' => '{DAV:}write-acl',
-                'abstract' => false,
-                'aggregates' => array(),
-                'concrete' => '{DAV:}write-acl',
-            ),
-            '{DAV:}write-properties' => array(
-                'privilege' => '{DAV:}write-properties',
-                'abstract' => false,
-                'aggregates' => array(),
-                'concrete' => '{DAV:}write-properties',
-            ),
-            '{DAV:}write-content' => array(
-                'privilege' => '{DAV:}write-content',
-                'abstract' => false,
-                'aggregates' => array(),
-                'concrete' => '{DAV:}write-content',
-            ),
-            '{DAV:}unlock' => array(
-                'privilege' => '{DAV:}unlock',
-                'abstract' => false,
-                'aggregates' => array(),
-                'concrete' => '{DAV:}unlock',
-            ),
-            '{DAV:}bind' => array(
-                'privilege' => '{DAV:}bind',
-                'abstract' => false,
-                'aggregates' => array(),
-                'concrete' => '{DAV:}bind',
-            ),
-            '{DAV:}unbind' => array(
-                'privilege' => '{DAV:}unbind',
-                'abstract' => false,
-                'aggregates' => array(),
-                'concrete' => '{DAV:}unbind',
-            ),
-
-        );
+            ],
+            '{DAV:}write-properties' => [
+                'privilege'  => '{DAV:}write-properties',
+                'abstract'   => false,
+                'aggregates' => [],
+                'concrete'   => '{DAV:}write-properties',
+            ],
+            '{DAV:}write-content' => [
+                'privilege'  => '{DAV:}write-content',
+                'abstract'   => false,
+                'aggregates' => [],
+                'concrete'   => '{DAV:}write-content',
+            ],
+            '{DAV:}unlock' => [
+                'privilege'  => '{DAV:}unlock',
+                'abstract'   => false,
+                'aggregates' => [],
+                'concrete'   => '{DAV:}unlock',
+            ],
+            '{DAV:}bind' => [
+                'privilege'  => '{DAV:}bind',
+                'abstract'   => false,
+                'aggregates' => [],
+                'concrete'   => '{DAV:}bind',
+            ],
+            '{DAV:}unbind' => [
+                'privilege'  => '{DAV:}unbind',
+                'abstract'   => false,
+                'aggregates' => [],
+                'concrete'   => '{DAV:}unbind',
+            ],
+
+        ];
 
         $plugin = new Plugin();
+        $plugin->allowUnauthenticatedAccess = false;
         $server = new DAV\Server();
         $server->addPlugin($plugin);
         $this->assertEquals($expected, $plugin->getFlatPrivilegeSet(''));
@@ -132,24 +126,26 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
     function testCurrentUserPrincipalsNotLoggedIn() {
 
         $acl = new Plugin();
+        $acl->allowUnauthenticatedAccess = false;
         $server = new DAV\Server();
         $server->addPlugin($acl);
 
-        $this->assertEquals(array(),$acl->getCurrentUserPrincipals());
+        $this->assertEquals([], $acl->getCurrentUserPrincipals());
 
     }
 
     function testCurrentUserPrincipalsSimple() {
 
-        $tree = array(
+        $tree = [
 
-            new DAV\SimpleCollection('principals', array(
-                new MockPrincipal('admin','principals/admin'),
-            ))
+            new DAV\SimpleCollection('principals', [
+                new MockPrincipal('admin', 'principals/admin'),
+            ])
 
-        );
+        ];
 
         $acl = new Plugin();
+        $acl->allowUnauthenticatedAccess = false;
         $server = new DAV\Server($tree);
         $server->addPlugin($acl);
 
@@ -159,24 +155,25 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
         //forcing login
         $auth->beforeMethod(new HTTP\Request(), new HTTP\Response());
 
-        $this->assertEquals(array('principals/admin'),$acl->getCurrentUserPrincipals());
+        $this->assertEquals(['principals/admin'], $acl->getCurrentUserPrincipals());
 
     }
 
     function testCurrentUserPrincipalsGroups() {
 
-        $tree = array(
+        $tree = [
 
-            new DAV\SimpleCollection('principals', array(
-                new MockPrincipal('admin','principals/admin',array('principals/administrators', 'principals/everyone')),
-                new MockPrincipal('administrators','principals/administrators',array('principals/groups'), array('principals/admin')),
-                new MockPrincipal('everyone','principals/everyone',array(), array('principals/admin')),
-                new MockPrincipal('groups','principals/groups',array(), array('principals/administrators')),
-            ))
+            new DAV\SimpleCollection('principals', [
+                new MockPrincipal('admin', 'principals/admin', ['principals/administrators', 'principals/everyone']),
+                new MockPrincipal('administrators', 'principals/administrators', ['principals/groups'], ['principals/admin']),
+                new MockPrincipal('everyone', 'principals/everyone', [], ['principals/admin']),
+                new MockPrincipal('groups', 'principals/groups', [], ['principals/administrators']),
+            ])
 
-        );
+        ];
 
         $acl = new Plugin();
+        $acl->allowUnauthenticatedAccess = false;
         $server = new DAV\Server($tree);
         $server->addPlugin($acl);
 
@@ -186,75 +183,77 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
         //forcing login
         $auth->beforeMethod(new HTTP\Request(), new HTTP\Response());
 
-        $expected = array(
+        $expected = [
             'principals/admin',
             'principals/administrators',
             'principals/everyone',
             'principals/groups',
-        );
+        ];
 
-        $this->assertEquals($expected,$acl->getCurrentUserPrincipals());
+        $this->assertEquals($expected, $acl->getCurrentUserPrincipals());
 
         // The second one should trigger the cache and be identical
-        $this->assertEquals($expected,$acl->getCurrentUserPrincipals());
+        $this->assertEquals($expected, $acl->getCurrentUserPrincipals());
 
     }
 
     function testGetACL() {
 
-        $acl = array(
-            array(
+        $acl = [
+            [
                 'principal' => 'principals/admin',
                 'privilege' => '{DAV:}read',
-            ),
-            array(
+            ],
+            [
                 'principal' => 'principals/admin',
                 'privilege' => '{DAV:}write',
-            ),
-        );
+            ],
+        ];
 
 
-        $tree = array(
-            new MockACLNode('foo',$acl),
-        );
+        $tree = [
+            new MockACLNode('foo', $acl),
+        ];
 
         $server = new DAV\Server($tree);
         $aclPlugin = new Plugin();
+        $aclPlugin->allowUnauthenticatedAccess = false;
         $server->addPlugin($aclPlugin);
 
-        $this->assertEquals($acl,$aclPlugin->getACL('foo'));
+        $this->assertEquals($acl, $aclPlugin->getACL('foo'));
 
     }
 
     function testGetCurrentUserPrivilegeSet() {
 
-        $acl = array(
-            array(
+        $acl = [
+            [
                 'principal' => 'principals/admin',
                 'privilege' => '{DAV:}read',
-            ),
-            array(
+            ],
+            [
                 'principal' => 'principals/user1',
                 'privilege' => '{DAV:}read',
-            ),
-            array(
+            ],
+            [
                 'principal' => 'principals/admin',
                 'privilege' => '{DAV:}write',
-            ),
-        );
+            ],
+        ];
 
 
-        $tree = array(
-            new MockACLNode('foo',$acl),
+        $tree = [
+            new MockACLNode('foo', $acl),
 
-            new DAV\SimpleCollection('principals', array(
-                new MockPrincipal('admin','principals/admin'),
-            )),
+            new DAV\SimpleCollection('principals', [
+                new MockPrincipal('admin', 'principals/admin'),
+            ]),
 
-        );
+        ];
 
         $server = new DAV\Server($tree);
         $aclPlugin = new Plugin();
+        $aclPlugin->allowUnauthenticatedAccess = false;
         $server->addPlugin($aclPlugin);
 
         $auth = new DAV\Auth\Plugin(new DAV\Auth\Backend\Mock());
@@ -263,52 +262,51 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
         //forcing login
         $auth->beforeMethod(new HTTP\Request(), new HTTP\Response());
 
-        $expected = array(
+        $expected = [
             '{DAV:}write',
-            '{DAV:}write-acl',
             '{DAV:}write-properties',
             '{DAV:}write-content',
-            '{DAV:}bind',
-            '{DAV:}unbind',
             '{DAV:}unlock',
+            '{DAV:}write-acl',
             '{DAV:}read',
             '{DAV:}read-acl',
             '{DAV:}read-current-user-privilege-set',
-        );
+        ];
 
-        $this->assertEquals($expected,$aclPlugin->getCurrentUserPrivilegeSet('foo'));
+        $this->assertEquals($expected, $aclPlugin->getCurrentUserPrivilegeSet('foo'));
 
     }
 
     function testCheckPrivileges() {
 
-        $acl = array(
-            array(
+        $acl = [
+            [
                 'principal' => 'principals/admin',
                 'privilege' => '{DAV:}read',
-            ),
-            array(
+            ],
+            [
                 'principal' => 'principals/user1',
                 'privilege' => '{DAV:}read',
-            ),
-            array(
+            ],
+            [
                 'principal' => 'principals/admin',
                 'privilege' => '{DAV:}write',
-            ),
-        );
+            ],
+        ];
 
 
-        $tree = array(
-            new MockACLNode('foo',$acl),
+        $tree = [
+            new MockACLNode('foo', $acl),
 
-            new DAV\SimpleCollection('principals', array(
-                new MockPrincipal('admin','principals/admin'),
-            )),
+            new DAV\SimpleCollection('principals', [
+                new MockPrincipal('admin', 'principals/admin'),
+            ]),
 
-        );
+        ];
 
         $server = new DAV\Server($tree);
         $aclPlugin = new Plugin();
+        $aclPlugin->allowUnauthenticatedAccess = false;
         $server->addPlugin($aclPlugin);
 
         $auth = new DAV\Auth\Plugin(new DAV\Auth\Backend\Mock());
@@ -317,11 +315,7 @@ class SimplePluginTest extends \PHPUnit_Framework_TestCase {
         //forcing login
         //$auth->beforeMethod('GET','/');
 
-        $this->assertFalse($aclPlugin->checkPrivileges('foo', array('{DAV:}read'), Plugin::R_PARENT, false));
+        $this->assertFalse($aclPlugin->checkPrivileges('foo', ['{DAV:}read'], Plugin::R_PARENT, false));
 
     }
 }
-
-
-
-
diff --git a/vendor/sabre/dav/tests/Sabre/DAVServerTest.php b/vendor/sabre/dav/tests/Sabre/DAVServerTest.php
index d329b5b05..35f240d23 100644
--- a/vendor/sabre/dav/tests/Sabre/DAVServerTest.php
+++ b/vendor/sabre/dav/tests/Sabre/DAVServerTest.php
@@ -27,6 +27,7 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
     protected $setupCalDAVICSExport = false;
     protected $setupLocks = false;
     protected $setupFiles = false;
+    protected $setupSharing = false;
     protected $setupPropertyStorage = false;
 
     /**
@@ -90,6 +91,13 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
     protected $locksPlugin;
 
     /**
+     * Sharing plugin.
+     *
+     * @var \Sabre\DAV\Sharing\Plugin
+     */
+    protected $sharingPlugin;
+
+    /*
      * @var Sabre\DAV\PropertyStorage\Plugin
      */
     protected $propertyStoragePlugin;
@@ -102,6 +110,12 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
 
     function setUp() {
 
+        $this->initializeEverything();
+
+    }
+
+    function initializeEverything() {
+
         $this->setUpBackends();
         $this->setUpTree();
 
@@ -113,6 +127,10 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
             $this->caldavPlugin = new CalDAV\Plugin();
             $this->server->addPlugin($this->caldavPlugin);
         }
+        if ($this->setupCalDAVSharing || $this->setupSharing) {
+            $this->sharingPlugin = new DAV\Sharing\Plugin();
+            $this->server->addPlugin($this->sharingPlugin);
+        }
         if ($this->setupCalDAVSharing) {
             $this->caldavSharingPlugin = new CalDAV\SharingPlugin();
             $this->server->addPlugin($this->caldavSharingPlugin);
@@ -132,10 +150,6 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
             $this->carddavPlugin = new CardDAV\Plugin();
             $this->server->addPlugin($this->carddavPlugin);
         }
-        if ($this->setupACL) {
-            $this->aclPlugin = new DAVACL\Plugin();
-            $this->server->addPlugin($this->aclPlugin);
-        }
         if ($this->setupLocks) {
             $this->locksPlugin = new DAV\Locks\Plugin(
                 $this->locksBackend
@@ -149,13 +163,15 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
             $this->server->addPlugin($this->propertyStoragePlugin);
         }
         if ($this->autoLogin) {
-            $authBackend = new DAV\Auth\Backend\Mock();
-            $authBackend->setPrincipal('principals/' . $this->autoLogin);
-            $this->authPlugin = new DAV\Auth\Plugin($authBackend);
-            $this->server->addPlugin($this->authPlugin);
-
-            // This will trigger the actual login procedure
-            $this->authPlugin->beforeMethod(new Request(), new Response());
+            $this->autoLogin($this->autoLogin);
+        }
+        if ($this->setupACL) {
+            $this->aclPlugin = new DAVACL\Plugin();
+            if (!$this->autoLogin) {
+                $this->aclPlugin->allowUnauthenticatedAccess = false;
+            }
+            $this->aclPlugin->adminPrincipals = ['principals/admin'];
+            $this->server->addPlugin($this->aclPlugin);
         }
 
     }
@@ -166,23 +182,55 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
      * You can either pass an instance of Sabre\HTTP\Request, or an array,
      * which will then be used as the _SERVER array.
      *
+     * If $expectedStatus is set, we'll compare it with the HTTP status of
+     * the returned response. If it doesn't match, we'll immediately fail
+     * the test.
+     *
      * @param array|\Sabre\HTTP\Request $request
+     * @param int $expectedStatus
      * @return \Sabre\HTTP\Response
      */
-    function request($request) {
+    function request($request, $expectedStatus = null) {
 
         if (is_array($request)) {
             $request = HTTP\Request::createFromServerArray($request);
         }
+        $response = new HTTP\ResponseMock();
+
         $this->server->httpRequest = $request;
-        $this->server->httpResponse = new HTTP\ResponseMock();
+        $this->server->httpResponse = $response;
         $this->server->exec();
 
+        if ($expectedStatus) {
+            $responseBody = $expectedStatus !== $response->getStatus() ? $response->getBodyAsString() : '';
+            $this->assertEquals($expectedStatus, $response->getStatus(), 'Incorrect HTTP status received for request. Response body: ' . $responseBody);
+        }
         return $this->server->httpResponse;
 
     }
 
     /**
+     * This function takes a username and sets the server in a state where
+     * this user is logged in, and no longer requires an authentication check.
+     *
+     * @param string $userName
+     */
+    function autoLogin($userName) {
+        $authBackend = new DAV\Auth\Backend\Mock();
+        $authBackend->setPrincipal('principals/' . $userName);
+        $this->authPlugin = new DAV\Auth\Plugin($authBackend);
+
+        // If the auth plugin already exists, we're removing its hooks:
+        if ($oldAuth = $this->server->getPlugin('auth')) {
+            $this->server->removeListener('beforeMethod', [$oldAuth, 'beforeMethod']);
+        }
+        $this->server->addPlugin($this->authPlugin);
+
+        // This will trigger the actual login procedure
+        $this->authPlugin->beforeMethod(new Request(), new Response());
+    }
+
+    /**
      * Override this to provide your own Tree for your test-case.
      */
     function setUpTree() {
@@ -200,10 +248,14 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
             );
         }
 
-        if ($this->setupCardDAV || $this->setupCalDAV) {
+        if ($this->setupCalDAV) {
             $this->tree[] = new CalDAV\Principal\Collection(
                 $this->principalBackend
             );
+        } elseif ($this->setupCardDAV || $this->setupACL) {
+            $this->tree[] = new DAVACL\PrincipalCollection(
+                $this->principalBackend
+            );
         }
         if ($this->setupFiles) {
 
@@ -231,7 +283,7 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
         if ($this->setupCardDAV && is_null($this->carddavBackend)) {
             $this->carddavBackend = new CardDAV\Backend\Mock($this->carddavAddressBooks, $this->carddavCards);
         }
-        if ($this->setupCardDAV || $this->setupCalDAV) {
+        if ($this->setupCardDAV || $this->setupCalDAV || $this->setupACL) {
             $this->principalBackend = new DAVACL\PrincipalBackend\Mock();
         }
         if ($this->setupLocks) {
@@ -244,7 +296,7 @@ abstract class DAVServerTest extends \PHPUnit_Framework_TestCase {
     }
 
 
-    function assertHTTPStatus($expectedStatus, HTTP\Request $req) {
+    function assertHttpStatus($expectedStatus, HTTP\Request $req) {
 
         $resp = $this->request($req);
         $this->assertEquals((int)$expectedStatus, (int)$resp->status, 'Incorrect HTTP status received: ' . $resp->body);
diff --git a/vendor/sabre/dav/tests/Sabre/TestUtil.php b/vendor/sabre/dav/tests/Sabre/TestUtil.php
index 20bce1ea0..9df94915f 100644
--- a/vendor/sabre/dav/tests/Sabre/TestUtil.php
+++ b/vendor/sabre/dav/tests/Sabre/TestUtil.php
@@ -11,17 +11,17 @@ class TestUtil {
      */
     static function clearTempDir() {
 
-        self::deleteTree(SABRE_TEMPDIR,false);
+        self::deleteTree(SABRE_TEMPDIR, false);
 
     }
 
 
-    static private function deleteTree($path,$deleteRoot = true) {
+    private static function deleteTree($path, $deleteRoot = true) {
 
-        foreach(scandir($path) as $node) {
+        foreach (scandir($path) as $node) {
 
-            if ($node=='.' || $node=='..') continue;
-            $myPath = $path.'/'. $node;
+            if ($node == '.' || $node == '..') continue;
+            $myPath = $path . '/' . $node;
             if (is_file($myPath)) {
                 unlink($myPath);
             } else {
@@ -38,8 +38,8 @@ class TestUtil {
     static function getMySQLDB() {
 
         try {
-            $pdo = new \PDO(SABRE_MYSQLDSN,SABRE_MYSQLUSER,SABRE_MYSQLPASS);
-            $pdo->setAttribute(\PDO::ATTR_ERRMODE,\PDO::ERRMODE_EXCEPTION);
+            $pdo = new \PDO(SABRE_MYSQLDSN, SABRE_MYSQLUSER, SABRE_MYSQLPASS);
+            $pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
             return $pdo;
         } catch (\PDOException $e) {
             return null;
@@ -49,10 +49,23 @@ class TestUtil {
 
     static function getSQLiteDB() {
 
-        $pdo = new \PDO('sqlite:'.SABRE_TEMPDIR.'/pdobackend');
-        $pdo->setAttribute(\PDO::ATTR_ERRMODE,\PDO::ERRMODE_EXCEPTION);
+        $pdo = new \PDO('sqlite:' . SABRE_TEMPDIR . '/pdobackend');
+        $pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
         return $pdo;
 
     }
 
+    static function getPgSqlDB() {
+
+        //try {
+            $pdo = new \PDO(SABRE_PGSQLDSN);
+            $pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
+            return $pdo;
+        //} catch (\PDOException $e) {
+        //    return null;
+        //}
+
+    }
+
+
 }
diff --git a/vendor/sabre/dav/tests/bootstrap.php b/vendor/sabre/dav/tests/bootstrap.php
index 325ccd3c7..26eb32aa2 100644
--- a/vendor/sabre/dav/tests/bootstrap.php
+++ b/vendor/sabre/dav/tests/bootstrap.php
@@ -7,28 +7,30 @@ $autoLoader = include __DIR__ . '/../vendor/autoload.php';
 // SabreDAV tests auto loading
 $autoLoader->add('Sabre\\', __DIR__);
 // VObject tests auto loading
-$autoLoader->addPsr4('Sabre\\VObject\\',__DIR__ . '/../vendor/sabre/vobject/tests/VObject');
-$autoLoader->addPsr4('Sabre\\Xml\\',__DIR__ . '/../vendor/sabre/xml/tests/Sabre/Xml');
+$autoLoader->addPsr4('Sabre\\VObject\\', __DIR__ . '/../vendor/sabre/vobject/tests/VObject');
+$autoLoader->addPsr4('Sabre\\Xml\\', __DIR__ . '/../vendor/sabre/xml/tests/Sabre/Xml');
 
 date_default_timezone_set('UTC');
 
 $config = [
     'SABRE_TEMPDIR'   => dirname(__FILE__) . '/temp/',
-    'SABRE_HASSQLITE' => in_array('sqlite',PDO::getAvailableDrivers()),
-    'SABRE_HASMYSQL'  => in_array('mysql',PDO::getAvailableDrivers()),
-    'SABRE_MYSQLDSN'  => 'mysql:host=127.0.0.1;dbname=sabredav',
-    'SABRE_MYSQLUSER' => 'root',
+    'SABRE_HASSQLITE' => in_array('sqlite', PDO::getAvailableDrivers()),
+    'SABRE_HASMYSQL'  => in_array('mysql', PDO::getAvailableDrivers()),
+    'SABRE_HASPGSQL'  => in_array('pgsql', PDO::getAvailableDrivers()),
+    'SABRE_MYSQLDSN'  => 'mysql:host=127.0.0.1;dbname=sabredav_test',
+    'SABRE_MYSQLUSER' => 'sabredav',
     'SABRE_MYSQLPASS' => '',
+    'SABRE_PGSQLDSN'  => 'pgsql:host=localhost;dbname=sabredav_test;user=sabredav;password=sabredav',
 ];
 
 if (file_exists(__DIR__ . '/config.user.php')) {
     include __DIR__ . '/config.user.php';
-    foreach($userConfig as $key=>$value) {
+    foreach ($userConfig as $key => $value) {
         $config[$key] = $value;
     }
 }
 
-foreach($config as $key=>$value) {
+foreach ($config as $key => $value) {
     if (!defined($key)) define($key, $value);
 }
 
diff --git a/vendor/sabre/dav/tests/phpunit.xml b/vendor/sabre/dav/tests/phpunit.xml
deleted file mode 100644
index db475f12b..000000000
--- a/vendor/sabre/dav/tests/phpunit.xml
+++ /dev/null
@@ -1,47 +0,0 @@
-<phpunit
-  colors="true"
-  bootstrap="bootstrap.php"
-  convertErrorsToExceptions="true"
-  convertNoticesToExceptions="true"
-  convertWarningsToExceptions="true"
-  strict="true"
-  >
-  <testsuite name="sabre-event">
-      <directory>../vendor/sabre/event/tests/</directory>
-  </testsuite>
-  <testsuite name="sabre-uri">
-      <directory>../vendor/sabre/uri/tests/</directory>
-  </testsuite>
-  <testsuite name="sabre-xml">
-    <directory>../vendor/sabre/xml/tests/Sabre/Xml/</directory>
-  </testsuite>
-  <testsuite name="sabre-http">
-      <directory>../vendor/sabre/http/tests/HTTP</directory>
-  </testsuite>
-  <testsuite name="sabre-vobject">
-      <directory>../vendor/sabre/vobject/tests/VObject</directory>
-  </testsuite>
-
-  <testsuite name="sabre-dav">
-      <directory>Sabre/DAV</directory>
-  </testsuite>
-  <testsuite name="sabre-davacl">
-      <directory>Sabre/DAVACL</directory>
-  </testsuite>
-  <testsuite name="sabre-caldav">
-      <directory>Sabre/CalDAV</directory>
-  </testsuite>
-  <testsuite name="sabre-carddav">
-      <directory>Sabre/CardDAV</directory>
-  </testsuite>
-
-  <filter>
-    <whitelist addUncoveredFilesFromWhitelist="true">
-       <directory suffix=".php">../lib/</directory>
-       <exclude>
-         <file>../lib/Sabre/autoload.php</file>
-         <file>../lib/Sabre/VObject/includes.php</file>
-       </exclude>
-    </whitelist>
-  </filter>
-</phpunit>