initial sabre upgrade (needs lots of work - to wit: authentication, redo the browser interface, and rework event export/import)

45 files changed, 0 insertions, 8152 deletions

diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/AbstractBackend.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/AbstractBackend.php
deleted file mode 100644
index c83409eab..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/AbstractBackend.php
+++ /dev/null
@@ -1,155 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Backend;
-
-use Sabre\VObject;
-use Sabre\CalDAV;
-
-/**
- * Abstract Calendaring backend. Extend this class to create your own backends.
- *
- * Checkout the BackendInterface for all the methods that must be implemented.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-abstract class AbstractBackend implements BackendInterface {
-
-    /**
-     * Updates properties for a calendar.
-     *
-     * The mutations array uses the propertyName in clark-notation as key,
-     * and the array value for the property value. In the case a property
-     * should be deleted, the property value will be null.
-     *
-     * This method must be atomic. If one property cannot be changed, the
-     * entire operation must fail.
-     *
-     * If the operation was successful, true can be returned.
-     * If the operation failed, false can be returned.
-     *
-     * Deletion of a non-existent property is always successful.
-     *
-     * Lastly, it is optional to return detailed information about any
-     * failures. In this case an array should be returned with the following
-     * structure:
-     *
-     * array(
-     *   403 => array(
-     *      '{DAV:}displayname' => null,
-     *   ),
-     *   424 => array(
-     *      '{DAV:}owner' => null,
-     *   )
-     * )
-     *
-     * In this example it was forbidden to update {DAV:}displayname.
-     * (403 Forbidden), which in turn also caused {DAV:}owner to fail
-     * (424 Failed Dependency) because the request needs to be atomic.
-     *
-     * @param mixed $calendarId
-     * @param array $mutations
-     * @return bool|array
-     */
-    public function updateCalendar($calendarId, array $mutations) {
-
-        return false;
-
-    }
-
-    /**
-     * Performs a calendar-query on the contents of this calendar.
-     *
-     * The calendar-query is defined in RFC4791 : CalDAV. Using the
-     * calendar-query it is possible for a client to request a specific set of
-     * object, based on contents of iCalendar properties, date-ranges and
-     * iCalendar component types (VTODO, VEVENT).
-     *
-     * This method should just return a list of (relative) urls that match this
-     * query.
-     *
-     * The list of filters are specified as an array. The exact array is
-     * documented by \Sabre\CalDAV\CalendarQueryParser.
-     *
-     * Note that it is extremely likely that getCalendarObject for every path
-     * returned from this method will be called almost immediately after. You
-     * may want to anticipate this to speed up these requests.
-     *
-     * This method provides a default implementation, which parses *all* the
-     * iCalendar objects in the specified calendar.
-     *
-     * This default may well be good enough for personal use, and calendars
-     * that aren't very large. But if you anticipate high usage, big calendars
-     * or high loads, you are strongly adviced to optimize certain paths.
-     *
-     * The best way to do so is override this method and to optimize
-     * specifically for 'common filters'.
-     *
-     * Requests that are extremely common are:
-     *   * requests for just VEVENTS
-     *   * requests for just VTODO
-     *   * requests with a time-range-filter on either VEVENT or VTODO.
-     *
-     * ..and combinations of these requests. It may not be worth it to try to
-     * handle every possible situation and just rely on the (relatively
-     * easy to use) CalendarQueryValidator to handle the rest.
-     *
-     * Note that especially time-range-filters may be difficult to parse. A
-     * time-range filter specified on a VEVENT must for instance also handle
-     * recurrence rules correctly.
-     * A good example of how to interprete all these filters can also simply
-     * be found in \Sabre\CalDAV\CalendarQueryFilter. This class is as correct
-     * as possible, so it gives you a good idea on what type of stuff you need
-     * to think of.
-     *
-     * @param mixed $calendarId
-     * @param array $filters
-     * @return array
-     */
-    public function calendarQuery($calendarId, array $filters) {
-
-        $result = array();
-        $objects = $this->getCalendarObjects($calendarId);
-
-        $validator = new \Sabre\CalDAV\CalendarQueryValidator();
-
-        foreach($objects as $object) {
-
-            if ($this->validateFilterForObject($object, $filters)) {
-                $result[] = $object['uri'];
-            }
-
-        }
-
-        return $result;
-
-    }
-
-    /**
-     * This method validates if a filters (as passed to calendarQuery) matches
-     * the given object.
-     *
-     * @param array $object
-     * @param array $filters
-     * @return bool
-     */
-    protected function validateFilterForObject(array $object, array $filters) {
-
-        // Unfortunately, setting the 'calendardata' here is optional. If
-        // it was excluded, we actually need another call to get this as
-        // well.
-        if (!isset($object['calendardata'])) {
-            $object = $this->getCalendarObject($object['calendarid'], $object['uri']);
-        }
-
-        $data = is_resource($object['calendardata'])?stream_get_contents($object['calendardata']):$object['calendardata'];
-        $vObject = VObject\Reader::read($data);
-
-        $validator = new CalDAV\CalendarQueryValidator();
-        return $validator->validate($vObject, $filters);
-
-    }
-
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/BackendInterface.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/BackendInterface.php
deleted file mode 100644
index 0dc31e5f4..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/BackendInterface.php
+++ /dev/null
@@ -1,233 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Backend;
-
-/**
- * Every CalDAV backend must at least implement this interface.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-interface BackendInterface {
-
-    /**
-     * 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, which the basename of the uri with which the calendar is
-     *    accessed.
-     *  * 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'.
-     *
-     * @param string $principalUri
-     * @return array
-     */
-    public function getCalendarsForUser($principalUri);
-
-    /**
-     * 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 $properties
-     * @return void
-     */
-    public function createCalendar($principalUri,$calendarUri,array $properties);
-
-    /**
-     * Updates properties for a calendar.
-     *
-     * The mutations array uses the propertyName in clark-notation as key,
-     * and the array value for the property value. In the case a property
-     * should be deleted, the property value will be null.
-     *
-     * This method must be atomic. If one property cannot be changed, the
-     * entire operation must fail.
-     *
-     * If the operation was successful, true can be returned.
-     * If the operation failed, false can be returned.
-     *
-     * Deletion of a non-existent property is always successful.
-     *
-     * Lastly, it is optional to return detailed information about any
-     * failures. In this case an array should be returned with the following
-     * structure:
-     *
-     * array(
-     *   403 => array(
-     *      '{DAV:}displayname' => null,
-     *   ),
-     *   424 => array(
-     *      '{DAV:}owner' => null,
-     *   )
-     * )
-     *
-     * In this example it was forbidden to update {DAV:}displayname.
-     * (403 Forbidden), which in turn also caused {DAV:}owner to fail
-     * (424 Failed Dependency) because the request needs to be atomic.
-     *
-     * @param mixed $calendarId
-     * @param array $mutations
-     * @return bool|array
-     */
-    public function updateCalendar($calendarId, array $mutations);
-
-    /**
-     * Delete a calendar and all it's objects
-     *
-     * @param mixed $calendarId
-     * @return void
-     */
-    public function deleteCalendar($calendarId);
-
-    /**
-     * Returns all calendar objects within a calendar.
-     *
-     * Every item contains an array with the following keys:
-     *   * id - unique identifier which will be used for subsequent updates
-     *   * calendardata - The iCalendar-compatible calendar data
-     *   * uri - a unique key which will be used to construct the uri. This can be any arbitrary string.
-     *   * lastmodified - a timestamp of the last modification time
-     *   * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
-     *   '  "abcdef"')
-     *   * calendarid - The calendarid as it was passed to this function.
-     *   * size - The size of the calendar objects, in bytes.
-     *
-     * 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 mixed $calendarId
-     * @return array
-     */
-    public function getCalendarObjects($calendarId);
-
-    /**
-     * Returns information from a single calendar object, based on it's object
-     * uri.
-     *
-     * 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 mixed $calendarId
-     * @param string $objectUri
-     * @return array|null
-     */
-    public function getCalendarObject($calendarId,$objectUri);
-
-    /**
-     * Creates a new calendar object.
-     *
-     * 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 $calendarData
-     * @return string|null
-     */
-    public function createCalendarObject($calendarId,$objectUri,$calendarData);
-
-    /**
-     * Updates an existing calendarobject, based on it's uri.
-     *
-     * 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 $calendarData
-     * @return string|null
-     */
-    public function updateCalendarObject($calendarId,$objectUri,$calendarData);
-
-    /**
-     * Deletes an existing calendar object.
-     *
-     * @param mixed $calendarId
-     * @param string $objectUri
-     * @return void
-     */
-    public function deleteCalendarObject($calendarId,$objectUri);
-
-    /**
-     * Performs a calendar-query on the contents of this calendar.
-     *
-     * The calendar-query is defined in RFC4791 : CalDAV. Using the
-     * calendar-query it is possible for a client to request a specific set of
-     * object, based on contents of iCalendar properties, date-ranges and
-     * iCalendar component types (VTODO, VEVENT).
-     *
-     * This method should just return a list of (relative) urls that match this
-     * query.
-     *
-     * The list of filters are specified as an array. The exact array is
-     * documented by Sabre\CalDAV\CalendarQueryParser.
-     *
-     * Note that it is extremely likely that getCalendarObject for every path
-     * returned from this method will be called almost immediately after. You
-     * may want to anticipate this to speed up these requests.
-     *
-     * This method provides a default implementation, which parses *all* the
-     * iCalendar objects in the specified calendar.
-     *
-     * This default may well be good enough for personal use, and calendars
-     * that aren't very large. But if you anticipate high usage, big calendars
-     * or high loads, you are strongly adviced to optimize certain paths.
-     *
-     * The best way to do so is override this method and to optimize
-     * specifically for 'common filters'.
-     *
-     * Requests that are extremely common are:
-     *   * requests for just VEVENTS
-     *   * requests for just VTODO
-     *   * requests with a time-range-filter on either VEVENT or VTODO.
-     *
-     * ..and combinations of these requests. It may not be worth it to try to
-     * handle every possible situation and just rely on the (relatively
-     * easy to use) CalendarQueryValidator to handle the rest.
-     *
-     * Note that especially time-range-filters may be difficult to parse. A
-     * time-range filter specified on a VEVENT must for instance also handle
-     * recurrence rules correctly.
-     * A good example of how to interprete all these filters can also simply
-     * be found in Sabre\CalDAV\CalendarQueryFilter. This class is as correct
-     * as possible, so it gives you a good idea on what type of stuff you need
-     * to think of.
-     *
-     * @param mixed $calendarId
-     * @param array $filters
-     * @return array
-     */
-    public function calendarQuery($calendarId, array $filters);
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/NotificationSupport.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/NotificationSupport.php
deleted file mode 100644
index 96533ad6a..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/NotificationSupport.php
+++ /dev/null
@@ -1,47 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Backend;
-
-/**
- * Adds caldav notification support to a backend.
- *
- * Note: This feature is experimental, and may change in between different
- * SabreDAV versions.
- *
- * Notifications are defined at:
- * http://svn.calendarserver.org/repository/calendarserver/CalendarServer/trunk/doc/Extensions/caldav-notifications.txt
- *
- * These notifications are basically a list of server-generated notifications
- * displayed to the user. Users can dismiss notifications by deleting them.
- *
- * The primary usecase is to allow for calendar-sharing.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-interface NotificationSupport extends BackendInterface {
-
-    /**
-     * Returns a list of notifications for a given principal url.
-     *
-     * The returned array should only consist of implementations of
-     * \Sabre\CalDAV\Notifications\INotificationType.
-     *
-     * @param string $principalUri
-     * @return array
-     */
-    public function getNotificationsForPrincipal($principalUri);
-
-    /**
-     * This deletes a specific notifcation.
-     *
-     * This may be called by a client once it deems a notification handled.
-     *
-     * @param string $principalUri
-     * @param \Sabre\CalDAV\Notifications\INotificationType $notification
-     * @return void
-     */
-    public function deleteNotification($principalUri, \Sabre\CalDAV\Notifications\INotificationType $notification);
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/PDO.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/PDO.php
deleted file mode 100644
index 2e93a7b25..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/PDO.php
+++ /dev/null
@@ -1,691 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Backend;
-
-use Sabre\VObject;
-use Sabre\CalDAV;
-use Sabre\DAV;
-
-/**
- * PDO CalDAV backend
- *
- * This backend is used to store calendar-data in a PDO database, such as
- * sqlite or MySQL
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class PDO extends AbstractBackend {
-
-    /**
-     * We need to specify a max date, because we need to stop *somewhere*
-     *
-     * On 32 bit system the maximum for a signed integer is 2147483647, so
-     * MAX_DATE cannot be higher than date('Y-m-d', 2147483647) which results
-     * in 2038-01-19 to avoid problems when the date is converted
-     * to a unix timestamp.
-     */
-    const MAX_DATE = '2038-01-01';
-
-    /**
-     * pdo
-     *
-     * @var \PDO
-     */
-    protected $pdo;
-
-    /**
-     * The table name that will be used for calendars
-     *
-     * @var string
-     */
-    protected $calendarTableName;
-
-    /**
-     * The table name that will be used for calendar objects
-     *
-     * @var string
-     */
-    protected $calendarObjectTableName;
-
-    /**
-     * List of CalDAV properties, and how they map to database fieldnames
-     * Add your own properties by simply adding on to this array.
-     *
-     * Note that only string-based properties are supported here.
-     *
-     * @var array
-     */
-    public $propertyMap = array(
-        '{DAV:}displayname'                          => 'displayname',
-        '{urn:ietf:params:xml:ns:caldav}calendar-description' => 'description',
-        '{urn:ietf:params:xml:ns:caldav}calendar-timezone'    => 'timezone',
-        '{http://apple.com/ns/ical/}calendar-order'  => 'calendarorder',
-        '{http://apple.com/ns/ical/}calendar-color'  => 'calendarcolor',
-    );
-
-    /**
-     * Creates the backend
-     *
-     * @param \PDO $pdo
-     * @param string $calendarTableName
-     * @param string $calendarObjectTableName
-     */
-    public function __construct(\PDO $pdo, $calendarTableName = 'calendars', $calendarObjectTableName = 'calendarobjects') {
-
-        $this->pdo = $pdo;
-        $this->calendarTableName = $calendarTableName;
-        $this->calendarObjectTableName = $calendarObjectTableName;
-
-    }
-
-    /**
-     * 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, which the basename of the uri with which the calendar is
-     *    accessed.
-     *  * 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'.
-     *
-     * @param string $principalUri
-     * @return array
-     */
-    public function getCalendarsForUser($principalUri) {
-
-        $fields = array_values($this->propertyMap);
-        $fields[] = 'id';
-        $fields[] = 'uri';
-        $fields[] = 'ctag';
-        $fields[] = 'components';
-        $fields[] = 'principaluri';
-        $fields[] = 'transparent';
-
-        // Making fields a comma-delimited list
-        $fields = implode(', ', $fields);
-        $stmt = $this->pdo->prepare("SELECT " . $fields . " FROM ".$this->calendarTableName." WHERE principaluri = ? ORDER BY calendarorder ASC");
-        $stmt->execute(array($principalUri));
-
-        $calendars = array();
-        while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-
-            $components = array();
-            if ($row['components']) {
-                $components = explode(',',$row['components']);
-            }
-
-            $calendar = array(
-                'id' => $row['id'],
-                'uri' => $row['uri'],
-                'principaluri' => $row['principaluri'],
-                '{' . CalDAV\Plugin::NS_CALENDARSERVER . '}getctag' => $row['ctag']?$row['ctag']:'0',
-                '{' . CalDAV\Plugin::NS_CALDAV . '}supported-calendar-component-set' => new CalDAV\Property\SupportedCalendarComponentSet($components),
-                '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp' => new CalDAV\Property\ScheduleCalendarTransp($row['transparent']?'transparent':'opaque'),
-            );
-
-
-            foreach($this->propertyMap as $xmlName=>$dbName) {
-                $calendar[$xmlName] = $row[$dbName];
-            }
-
-            $calendars[] = $calendar;
-
-        }
-
-        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 $properties
-     * @return string
-     */
-    public function createCalendar($principalUri, $calendarUri, array $properties) {
-
-        $fieldNames = array(
-            'principaluri',
-            'uri',
-            'ctag',
-            'transparent',
-        );
-        $values = array(
-            ':principaluri' => $principalUri,
-            ':uri'          => $calendarUri,
-            ':ctag'         => 1,
-            ':transparent'  => 0,
-        );
-
-        // Default value
-        $sccs = '{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set';
-        $fieldNames[] = 'components';
-        if (!isset($properties[$sccs])) {
-            $values[':components'] = 'VEVENT,VTODO';
-        } else {
-            if (!($properties[$sccs] instanceof CalDAV\Property\SupportedCalendarComponentSet)) {
-                throw new DAV\Exception('The ' . $sccs . ' property must be of type: \Sabre\CalDAV\Property\SupportedCalendarComponentSet');
-            }
-            $values[':components'] = implode(',',$properties[$sccs]->getValue());
-        }
-        $transp = '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp';
-        if (isset($properties[$transp])) {
-            $values[':transparent'] = $properties[$transp]->getValue()==='transparent';
-        }
-
-        foreach($this->propertyMap as $xmlName=>$dbName) {
-            if (isset($properties[$xmlName])) {
-
-                $values[':' . $dbName] = $properties[$xmlName];
-                $fieldNames[] = $dbName;
-            }
-        }
-
-        $stmt = $this->pdo->prepare("INSERT INTO ".$this->calendarTableName." (".implode(', ', $fieldNames).") VALUES (".implode(', ',array_keys($values)).")");
-        $stmt->execute($values);
-
-        return $this->pdo->lastInsertId();
-
-    }
-
-    /**
-     * Updates properties for a calendar.
-     *
-     * The mutations array uses the propertyName in clark-notation as key,
-     * and the array value for the property value. In the case a property
-     * should be deleted, the property value will be null.
-     *
-     * This method must be atomic. If one property cannot be changed, the
-     * entire operation must fail.
-     *
-     * If the operation was successful, true can be returned.
-     * If the operation failed, false can be returned.
-     *
-     * Deletion of a non-existent property is always successful.
-     *
-     * Lastly, it is optional to return detailed information about any
-     * failures. In this case an array should be returned with the following
-     * structure:
-     *
-     * array(
-     *   403 => array(
-     *      '{DAV:}displayname' => null,
-     *   ),
-     *   424 => array(
-     *      '{DAV:}owner' => null,
-     *   )
-     * )
-     *
-     * In this example it was forbidden to update {DAV:}displayname.
-     * (403 Forbidden), which in turn also caused {DAV:}owner to fail
-     * (424 Failed Dependency) because the request needs to be atomic.
-     *
-     * @param string $calendarId
-     * @param array $mutations
-     * @return bool|array
-     */
-    public function updateCalendar($calendarId, array $mutations) {
-
-        $newValues = array();
-        $result = array(
-            200 => array(), // Ok
-            403 => array(), // Forbidden
-            424 => array(), // Failed Dependency
-        );
-
-        $hasError = false;
-
-        foreach($mutations as $propertyName=>$propertyValue) {
-
-            switch($propertyName) {
-                case '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-calendar-transp' :
-                    $fieldName = 'transparent';
-                    $newValues[$fieldName] = $propertyValue->getValue()==='transparent';
-                    break;
-                default :
-                    // Checking the property map
-                    if (!isset($this->propertyMap[$propertyName])) {
-                        // We don't know about this property.
-                        $hasError = true;
-                        $result[403][$propertyName] = null;
-                        unset($mutations[$propertyName]);
-                        continue;
-                    }
-
-                    $fieldName = $this->propertyMap[$propertyName];
-                    $newValues[$fieldName] = $propertyValue;
-            }
-
-        }
-
-        // If there were any errors we need to fail the request
-        if ($hasError) {
-            // Properties has the remaining properties
-            foreach($mutations as $propertyName=>$propertyValue) {
-                $result[424][$propertyName] = null;
-            }
-
-            // Removing unused statuscodes for cleanliness
-            foreach($result as $status=>$properties) {
-                if (is_array($properties) && count($properties)===0) unset($result[$status]);
-            }
-
-            return $result;
-
-        }
-
-        // Success
-
-        // Now we're generating the sql query.
-        $valuesSql = array();
-        foreach($newValues as $fieldName=>$value) {
-            $valuesSql[] = $fieldName . ' = ?';
-        }
-        $valuesSql[] = 'ctag = ctag + 1';
-
-        $stmt = $this->pdo->prepare("UPDATE " . $this->calendarTableName . " SET " . implode(', ',$valuesSql) . " WHERE id = ?");
-        $newValues['id'] = $calendarId;
-        $stmt->execute(array_values($newValues));
-
-        return true;
-
-    }
-
-    /**
-     * Delete a calendar and all it's objects
-     *
-     * @param string $calendarId
-     * @return void
-     */
-    public function deleteCalendar($calendarId) {
-
-        $stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarObjectTableName.' WHERE calendarid = ?');
-        $stmt->execute(array($calendarId));
-
-        $stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarTableName.' WHERE id = ?');
-        $stmt->execute(array($calendarId));
-
-    }
-
-    /**
-     * Returns all calendar objects within a calendar.
-     *
-     * Every item contains an array with the following keys:
-     *   * id - unique identifier which will be used for subsequent updates
-     *   * calendardata - The iCalendar-compatible calendar data
-     *   * uri - a unique key which will be used to construct the uri. This can be any arbitrary string.
-     *   * lastmodified - a timestamp of the last modification time
-     *   * etag - An arbitrary string, surrounded by double-quotes. (e.g.:
-     *   '  "abcdef"')
-     *   * calendarid - The calendarid as it was passed to this function.
-     *   * size - The size of the calendar objects, in bytes.
-     *
-     * 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 $calendarId
-     * @return array
-     */
-    public function getCalendarObjects($calendarId) {
-
-        $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size FROM '.$this->calendarObjectTableName.' WHERE calendarid = ?');
-        $stmt->execute(array($calendarId));
-
-        $result = array();
-        foreach($stmt->fetchAll(\PDO::FETCH_ASSOC) as $row) {
-            $result[] = array(
-                'id'           => $row['id'],
-                'uri'          => $row['uri'],
-                'lastmodified' => $row['lastmodified'],
-                'etag'         => '"' . $row['etag'] . '"',
-                'calendarid'   => $row['calendarid'],
-                'size'         => (int)$row['size'],
-            );
-        }
-
-        return $result;
-
-    }
-
-    /**
-     * Returns information from a single calendar object, based on it's object
-     * uri.
-     *
-     * 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 $objectUri
-     * @return array|null
-     */
-    public function getCalendarObject($calendarId,$objectUri) {
-
-        $stmt = $this->pdo->prepare('SELECT id, uri, lastmodified, etag, calendarid, size, calendardata FROM '.$this->calendarObjectTableName.' WHERE calendarid = ? AND uri = ?');
-        $stmt->execute(array($calendarId, $objectUri));
-        $row = $stmt->fetch(\PDO::FETCH_ASSOC);
-
-        if(!$row) return null;
-
-        return array(
-            'id'           => $row['id'],
-            'uri'          => $row['uri'],
-            'lastmodified' => $row['lastmodified'],
-            'etag'         => '"' . $row['etag'] . '"',
-            'calendarid'   => $row['calendarid'],
-            'size'         => (int)$row['size'],
-            'calendardata' => $row['calendardata'],
-         );
-
-    }
-
-
-    /**
-     * Creates a new calendar object.
-     *
-     * 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 $calendarData
-     * @return string|null
-     */
-    public function createCalendarObject($calendarId,$objectUri,$calendarData) {
-
-        $extraData = $this->getDenormalizedData($calendarData);
-
-        $stmt = $this->pdo->prepare('INSERT INTO '.$this->calendarObjectTableName.' (calendarid, uri, calendardata, lastmodified, etag, size, componenttype, firstoccurence, lastoccurence) VALUES (?,?,?,?,?,?,?,?,?)');
-        $stmt->execute(array(
-            $calendarId,
-            $objectUri,
-            $calendarData,
-            time(),
-            $extraData['etag'],
-            $extraData['size'],
-            $extraData['componentType'],
-            $extraData['firstOccurence'],
-            $extraData['lastOccurence'],
-        ));
-        $stmt = $this->pdo->prepare('UPDATE '.$this->calendarTableName.' SET ctag = ctag + 1 WHERE id = ?');
-        $stmt->execute(array($calendarId));
-
-        return '"' . $extraData['etag'] . '"';
-
-    }
-
-    /**
-     * Updates an existing calendarobject, based on it's uri.
-     *
-     * 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 $calendarData
-     * @return string|null
-     */
-    public function updateCalendarObject($calendarId,$objectUri,$calendarData) {
-
-        $extraData = $this->getDenormalizedData($calendarData);
-
-        $stmt = $this->pdo->prepare('UPDATE '.$this->calendarObjectTableName.' SET calendardata = ?, lastmodified = ?, etag = ?, size = ?, componenttype = ?, firstoccurence = ?, lastoccurence = ? WHERE calendarid = ? AND uri = ?');
-        $stmt->execute(array($calendarData,time(), $extraData['etag'], $extraData['size'], $extraData['componentType'], $extraData['firstOccurence'], $extraData['lastOccurence'] ,$calendarId,$objectUri));
-        $stmt = $this->pdo->prepare('UPDATE '.$this->calendarTableName.' SET ctag = ctag + 1 WHERE id = ?');
-        $stmt->execute(array($calendarId));
-
-        return '"' . $extraData['etag'] . '"';
-
-    }
-
-    /**
-     * Parses some information from calendar objects, used for optimized
-     * calendar-queries.
-     *
-     * Returns an array with the following keys:
-     *   * etag
-     *   * size
-     *   * componentType
-     *   * firstOccurence
-     *   * lastOccurence
-     *
-     * @param string $calendarData
-     * @return array
-     */
-    protected function getDenormalizedData($calendarData) {
-
-        $vObject = VObject\Reader::read($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();
-                    $endDate->add(VObject\DateTimeParser::parse($component->DURATION->getValue()));
-                    $lastOccurence = $endDate->getTimeStamp();
-                } elseif (!$component->DTSTART->hasTime()) {
-                    $endDate = clone $component->DTSTART->getDateTime();
-                    $endDate->modify('+1 day');
-                    $lastOccurence = $endDate->getTimeStamp();
-                } else {
-                    $lastOccurence = $firstOccurence;
-                }
-            } else {
-                $it = new VObject\RecurrenceIterator($vObject, (string)$component->UID);
-                $maxDate = new \DateTime(self::MAX_DATE);
-                if ($it->isInfinite()) {
-                    $lastOccurence = $maxDate->getTimeStamp();
-                } else {
-                    $end = $it->getDtEnd();
-                    while($it->valid() && $end < $maxDate) {
-                        $end = $it->getDtEnd();
-                        $it->next();
-
-                    }
-                    $lastOccurence = $end->getTimeStamp();
-                }
-
-            }
-        }
-
-        return array(
-            'etag' => md5($calendarData),
-            'size' => strlen($calendarData),
-            'componentType' => $componentType,
-            'firstOccurence' => $firstOccurence,
-            'lastOccurence'  => $lastOccurence,
-        );
-
-    }
-
-    /**
-     * Deletes an existing calendar object.
-     *
-     * @param string $calendarId
-     * @param string $objectUri
-     * @return void
-     */
-    public function deleteCalendarObject($calendarId,$objectUri) {
-
-        $stmt = $this->pdo->prepare('DELETE FROM '.$this->calendarObjectTableName.' WHERE calendarid = ? AND uri = ?');
-        $stmt->execute(array($calendarId,$objectUri));
-        $stmt = $this->pdo->prepare('UPDATE '. $this->calendarTableName .' SET ctag = ctag + 1 WHERE id = ?');
-        $stmt->execute(array($calendarId));
-
-    }
-
-    /**
-     * Performs a calendar-query on the contents of this calendar.
-     *
-     * The calendar-query is defined in RFC4791 : CalDAV. Using the
-     * calendar-query it is possible for a client to request a specific set of
-     * object, based on contents of iCalendar properties, date-ranges and
-     * iCalendar component types (VTODO, VEVENT).
-     *
-     * This method should just return a list of (relative) urls that match this
-     * query.
-     *
-     * The list of filters are specified as an array. The exact array is
-     * documented by \Sabre\CalDAV\CalendarQueryParser.
-     *
-     * Note that it is extremely likely that getCalendarObject for every path
-     * returned from this method will be called almost immediately after. You
-     * may want to anticipate this to speed up these requests.
-     *
-     * This method provides a default implementation, which parses *all* the
-     * iCalendar objects in the specified calendar.
-     *
-     * This default may well be good enough for personal use, and calendars
-     * that aren't very large. But if you anticipate high usage, big calendars
-     * or high loads, you are strongly adviced to optimize certain paths.
-     *
-     * The best way to do so is override this method and to optimize
-     * specifically for 'common filters'.
-     *
-     * Requests that are extremely common are:
-     *   * requests for just VEVENTS
-     *   * requests for just VTODO
-     *   * requests with a time-range-filter on a VEVENT.
-     *
-     * ..and combinations of these requests. It may not be worth it to try to
-     * handle every possible situation and just rely on the (relatively
-     * easy to use) CalendarQueryValidator to handle the rest.
-     *
-     * Note that especially time-range-filters may be difficult to parse. A
-     * time-range filter specified on a VEVENT must for instance also handle
-     * recurrence rules correctly.
-     * A good example of how to interprete all these filters can also simply
-     * be found in \Sabre\CalDAV\CalendarQueryFilter. This class is as correct
-     * as possible, so it gives you a good idea on what type of stuff you need
-     * to think of.
-     *
-     * This specific implementation (for the PDO) backend optimizes filters on
-     * specific components, and VEVENT time-ranges.
-     *
-     * @param string $calendarId
-     * @param array $filters
-     * @return array
-     */
-    public function calendarQuery($calendarId, array $filters) {
-
-        $result = array();
-        $validator = new \Sabre\CalDAV\CalendarQueryValidator();
-
-        $componentType = null;
-        $requirePostFilter = true;
-        $timeRange = null;
-
-        // if no filters were specified, we don't need to filter after a query
-        if (!$filters['prop-filters'] && !$filters['comp-filters']) {
-            $requirePostFilter = false;
-        }
-
-        // Figuring out if there's a component filter
-        if (count($filters['comp-filters']) > 0 && !$filters['comp-filters'][0]['is-not-defined']) {
-            $componentType = $filters['comp-filters'][0]['name'];
-
-            // Checking if we need post-filters
-            if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['time-range'] && !$filters['comp-filters'][0]['prop-filters']) {
-                $requirePostFilter = false;
-            }
-            // There was a time-range filter
-            if ($componentType == 'VEVENT' && isset($filters['comp-filters'][0]['time-range'])) {
-                $timeRange = $filters['comp-filters'][0]['time-range'];
-
-                // If start time OR the end time is not specified, we can do a
-                // 100% accurate mysql query.
-                if (!$filters['prop-filters'] && !$filters['comp-filters'][0]['comp-filters'] && !$filters['comp-filters'][0]['prop-filters'] && (!$timeRange['start'] || !$timeRange['end'])) {
-                    $requirePostFilter = false;
-                }
-            }
-
-        }
-
-        if ($requirePostFilter) {
-            $query = "SELECT uri, calendardata FROM ".$this->calendarObjectTableName." WHERE calendarid = :calendarid";
-        } else {
-            $query = "SELECT uri FROM ".$this->calendarObjectTableName." WHERE calendarid = :calendarid";
-        }
-
-        $values = array(
-            'calendarid' => $calendarId,
-        );
-
-        if ($componentType) {
-            $query.=" AND componenttype = :componenttype";
-            $values['componenttype'] = $componentType;
-        }
-
-        if ($timeRange && $timeRange['start']) {
-            $query.=" AND lastoccurence > :startdate";
-            $values['startdate'] = $timeRange['start']->getTimeStamp();
-        }
-        if ($timeRange && $timeRange['end']) {
-            $query.=" AND firstoccurence < :enddate";
-            $values['enddate'] = $timeRange['end']->getTimeStamp();
-        }
-
-        $stmt = $this->pdo->prepare($query);
-        $stmt->execute($values);
-
-        $result = array();
-        while($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
-            if ($requirePostFilter) {
-                if (!$this->validateFilterForObject($row, $filters)) {
-                    continue;
-                }
-            }
-            $result[] = $row['uri'];
-
-        }
-
-        return $result;
-
-    }
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/SharingSupport.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/SharingSupport.php
deleted file mode 100644
index 4538fa5b5..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Backend/SharingSupport.php
+++ /dev/null
@@ -1,243 +0,0 @@
-<?php
-
-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.
- *
- * 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\Invite
- *
- *
- * 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 getCalendarsForPrincipal.
- *
- * {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
- * getCalendarsByUser, 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.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-interface SharingSupport extends NotificationSupport {
-
-    /**
-     * 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 $remove
-     * @return void
-     */
-    function updateShares($calendarId, 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
-     *
-     * 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.
-     *
-     * @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 $summary A description of the reply
-     * @return null|string
-     */
-    function shareReply($href, $status, $calendarUri, $inReplyTo, $summary = null);
-
-    /**
-     * Publishes a calendar
-     *
-     * @param mixed $calendarId
-     * @param bool $value
-     * @return void
-     */
-    function setPublishStatus($calendarId, $value);
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Calendar.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Calendar.php
deleted file mode 100644
index 74fa15bb1..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Calendar.php
+++ /dev/null
@@ -1,376 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-use Sabre\DAV;
-use Sabre\DAVACL;
-
-/**
- * This object represents a CalDAV calendar.
- *
- * A calendar can contain multiple TODO and or Events. These are represented
- * as \Sabre\CalDAV\CalendarObject objects.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class Calendar implements ICalendar, DAV\IProperties, DAVACL\IACL {
-
-    /**
-     * This is an array with calendar information
-     *
-     * @var array
-     */
-    protected $calendarInfo;
-
-    /**
-     * CalDAV backend
-     *
-     * @var Backend\BackendInterface
-     */
-    protected $caldavBackend;
-
-    /**
-     * Constructor
-     *
-     * @param Backend\BackendInterface $caldavBackend
-     * @param array $calendarInfo
-     */
-    public function __construct(Backend\BackendInterface $caldavBackend, $calendarInfo) {
-
-        $this->caldavBackend = $caldavBackend;
-        $this->calendarInfo = $calendarInfo;
-
-    }
-
-    /**
-     * Returns the name of the calendar
-     *
-     * @return string
-     */
-    public function getName() {
-
-        return $this->calendarInfo['uri'];
-
-    }
-
-    /**
-     * Updates properties such as the display name and description
-     *
-     * @param array $mutations
-     * @return array
-     */
-    public function updateProperties($mutations) {
-
-        return $this->caldavBackend->updateCalendar($this->calendarInfo['id'],$mutations);
-
-    }
-
-    /**
-     * Returns the list of properties
-     *
-     * @param array $requestedProperties
-     * @return array
-     */
-    public function getProperties($requestedProperties) {
-
-        $response = array();
-
-        foreach($requestedProperties as $prop) switch($prop) {
-
-            case '{urn:ietf:params:xml:ns:caldav}supported-calendar-data' :
-                $response[$prop] = new Property\SupportedCalendarData();
-                break;
-            case '{urn:ietf:params:xml:ns:caldav}supported-collation-set' :
-                $response[$prop] =  new Property\SupportedCollationSet();
-                break;
-            case '{DAV:}owner' :
-                $response[$prop] = new DAVACL\Property\Principal(DAVACL\Property\Principal::HREF,$this->calendarInfo['principaluri']);
-                break;
-            default :
-                if (isset($this->calendarInfo[$prop])) $response[$prop] = $this->calendarInfo[$prop];
-                break;
-
-        }
-        return $response;
-
-    }
-
-    /**
-     * Returns a calendar object
-     *
-     * The contained calendar objects are for example Events or Todo's.
-     *
-     * @param string $name
-     * @return \Sabre\CalDAV\ICalendarObject
-     */
-    public function getChild($name) {
-
-        $obj = $this->caldavBackend->getCalendarObject($this->calendarInfo['id'],$name);
-
-        if (!$obj) throw new DAV\Exception\NotFound('Calendar object not found');
-
-        $obj['acl'] = $this->getACL();
-        // Removing the irrelivant
-        foreach($obj['acl'] as $key=>$acl) {
-            if ($acl['privilege'] === '{' . Plugin::NS_CALDAV . '}read-free-busy') {
-                unset($obj['acl'][$key]);
-            }
-        }
-
-        return new CalendarObject($this->caldavBackend,$this->calendarInfo,$obj);
-
-    }
-
-    /**
-     * Returns the full list of calendar objects
-     *
-     * @return array
-     */
-    public function getChildren() {
-
-        $objs = $this->caldavBackend->getCalendarObjects($this->calendarInfo['id']);
-        $children = array();
-        foreach($objs as $obj) {
-            $obj['acl'] = $this->getACL();
-            // Removing the irrelivant
-            foreach($obj['acl'] as $key=>$acl) {
-                if ($acl['privilege'] === '{' . Plugin::NS_CALDAV . '}read-free-busy') {
-                    unset($obj['acl'][$key]);
-                }
-            }
-            $children[] = new CalendarObject($this->caldavBackend,$this->calendarInfo,$obj);
-        }
-        return $children;
-
-    }
-
-    /**
-     * Checks if a child-node exists.
-     *
-     * @param string $name
-     * @return bool
-     */
-    public function childExists($name) {
-
-        $obj = $this->caldavBackend->getCalendarObject($this->calendarInfo['id'],$name);
-        if (!$obj)
-            return false;
-        else
-            return true;
-
-    }
-
-    /**
-     * Creates a new directory
-     *
-     * We actually block this, as subdirectories are not allowed in calendars.
-     *
-     * @param string $name
-     * @return void
-     */
-    public function createDirectory($name) {
-
-        throw new DAV\Exception\MethodNotAllowed('Creating collections in calendar objects is not allowed');
-
-    }
-
-    /**
-     * Creates a new file
-     *
-     * The contents of the new file must be a valid ICalendar string.
-     *
-     * @param string $name
-     * @param resource $calendarData
-     * @return string|null
-     */
-    public function createFile($name,$calendarData = null) {
-
-        if (is_resource($calendarData)) {
-            $calendarData = stream_get_contents($calendarData);
-        }
-        return $this->caldavBackend->createCalendarObject($this->calendarInfo['id'],$name,$calendarData);
-
-    }
-
-    /**
-     * Deletes the calendar.
-     *
-     * @return void
-     */
-    public function delete() {
-
-        $this->caldavBackend->deleteCalendar($this->calendarInfo['id']);
-
-    }
-
-    /**
-     * Renames the calendar. Note that most calendars use the
-     * {DAV:}displayname to display a name to display a name.
-     *
-     * @param string $newName
-     * @return void
-     */
-    public function setName($newName) {
-
-        throw new DAV\Exception\MethodNotAllowed('Renaming calendars is not yet supported');
-
-    }
-
-    /**
-     * Returns the last modification date as a unix timestamp.
-     *
-     * @return void
-     */
-    public function getLastModified() {
-
-        return null;
-
-    }
-
-    /**
-     * Returns the owner principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public function getOwner() {
-
-        return $this->calendarInfo['principaluri'];
-
-    }
-
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public 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
-     */
-    public function getACL() {
-
-        return array(
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner(),
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => $this->getOwner(),
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => $this->getOwner() . '/calendar-proxy-write',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner() . '/calendar-proxy-read',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{' . Plugin::NS_CALDAV . '}read-free-busy',
-                'principal' => '{DAV:}authenticated',
-                'protected' => true,
-            ),
-
-        );
-
-    }
-
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    public 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
-     */
-    public 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'][] = array(
-                'privilege' => '{' . Plugin::NS_CALDAV . '}read-free-busy',
-            );
-
-        }
-        return $default;
-
-    }
-
-    /**
-     * Performs a calendar-query on the contents of this calendar.
-     *
-     * The calendar-query is defined in RFC4791 : CalDAV. Using the
-     * calendar-query it is possible for a client to request a specific set of
-     * object, based on contents of iCalendar properties, date-ranges and
-     * iCalendar component types (VTODO, VEVENT).
-     *
-     * This method should just return a list of (relative) urls that match this
-     * query.
-     *
-     * The list of filters are specified as an array. The exact array is
-     * documented by Sabre\CalDAV\CalendarQueryParser.
-     *
-     * @param array $filters
-     * @return array
-     */
-    public function calendarQuery(array $filters) {
-
-        return $this->caldavBackend->calendarQuery($this->calendarInfo['id'], $filters);
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/CalendarObject.php b/vendor/sabre/dav/lib/Sabre/CalDAV/CalendarObject.php
deleted file mode 100644
index 2b9d2877e..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/CalendarObject.php
+++ /dev/null
@@ -1,279 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-/**
- * The CalendarObject represents a single VEVENT or VTODO within a Calendar.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class CalendarObject extends \Sabre\DAV\File implements ICalendarObject, \Sabre\DAVACL\IACL {
-
-    /**
-     * Sabre\CalDAV\Backend\BackendInterface
-     *
-     * @var Sabre\CalDAV\Backend\AbstractBackend
-     */
-    protected $caldavBackend;
-
-    /**
-     * Array with information about this CalendarObject
-     *
-     * @var array
-     */
-    protected $objectData;
-
-    /**
-     * Array with information about the containing calendar
-     *
-     * @var array
-     */
-    protected $calendarInfo;
-
-    /**
-     * Constructor
-     *
-     * @param Backend\BackendInterface $caldavBackend
-     * @param array $calendarInfo
-     * @param array $objectData
-     */
-    public function __construct(Backend\BackendInterface $caldavBackend,array $calendarInfo,array $objectData) {
-
-        $this->caldavBackend = $caldavBackend;
-
-        if (!isset($objectData['calendarid'])) {
-            throw new \InvalidArgumentException('The objectData argument must contain a \'calendarid\' property');
-        }
-        if (!isset($objectData['uri'])) {
-            throw new \InvalidArgumentException('The objectData argument must contain an \'uri\' property');
-        }
-
-        $this->calendarInfo = $calendarInfo;
-        $this->objectData = $objectData;
-
-    }
-
-    /**
-     * Returns the uri for this object
-     *
-     * @return string
-     */
-    public function getName() {
-
-        return $this->objectData['uri'];
-
-    }
-
-    /**
-     * Returns the ICalendar-formatted object
-     *
-     * @return string
-     */
-    public function get() {
-
-        // Pre-populating the 'calendardata' is optional, if we don't have it
-        // already we fetch it from the backend.
-        if (!isset($this->objectData['calendardata'])) {
-            $this->objectData = $this->caldavBackend->getCalendarObject($this->objectData['calendarid'], $this->objectData['uri']);
-        }
-        return $this->objectData['calendardata'];
-
-    }
-
-    /**
-     * Updates the ICalendar-formatted object
-     *
-     * @param string|resource $calendarData
-     * @return string
-     */
-    public function put($calendarData) {
-
-        if (is_resource($calendarData)) {
-            $calendarData = stream_get_contents($calendarData);
-        }
-        $etag = $this->caldavBackend->updateCalendarObject($this->calendarInfo['id'],$this->objectData['uri'],$calendarData);
-        $this->objectData['calendardata'] = $calendarData;
-        $this->objectData['etag'] = $etag;
-
-        return $etag;
-
-    }
-
-    /**
-     * Deletes the calendar object
-     *
-     * @return void
-     */
-    public function delete() {
-
-        $this->caldavBackend->deleteCalendarObject($this->calendarInfo['id'],$this->objectData['uri']);
-
-    }
-
-    /**
-     * Returns the mime content-type
-     *
-     * @return string
-     */
-    public function getContentType() {
-
-        return 'text/calendar; charset=utf-8';
-
-    }
-
-    /**
-     * Returns an ETag for this object.
-     *
-     * The ETag is an arbitrary string, but MUST be surrounded by double-quotes.
-     *
-     * @return string
-     */
-    public function getETag() {
-
-        if (isset($this->objectData['etag'])) {
-            return $this->objectData['etag'];
-        } else {
-            return '"' . md5($this->get()). '"';
-        }
-
-    }
-
-    /**
-     * Returns the last modification date as a unix timestamp
-     *
-     * @return int
-     */
-    public function getLastModified() {
-
-        return $this->objectData['lastmodified'];
-
-    }
-
-    /**
-     * Returns the size of this object in bytes
-     *
-     * @return int
-     */
-    public function getSize() {
-
-        if (array_key_exists('size',$this->objectData)) {
-            return $this->objectData['size'];
-        } else {
-            return strlen($this->get());
-        }
-
-    }
-
-    /**
-     * Returns the owner principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public function getOwner() {
-
-        return $this->calendarInfo['principaluri'];
-
-    }
-
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public function getGroup() {
-
-        return null;
-
-    }
-
-    /**
-     * Returns a list of ACE's for this node.
-     *
-     * Each ACE has the following properties:
-     *   * 'privilege', a string such as {DAV:}read or {DAV:}write. These are
-     *     currently the only supported privileges
-     *   * 'principal', a url to the principal who owns the node
-     *   * 'protected' (optional), indicating that this ACE is not allowed to
-     *      be updated.
-     *
-     * @return array
-     */
-    public function getACL() {
-
-        // An alternative acl may be specified in the object data.
-        if (isset($this->objectData['acl'])) {
-            return $this->objectData['acl'];
-        }
-
-        // The default ACL
-        return array(
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => $this->calendarInfo['principaluri'],
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => $this->calendarInfo['principaluri'],
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-write',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => $this->calendarInfo['principaluri'] . '/calendar-proxy-read',
-                'protected' => true,
-            ),
-
-        );
-
-    }
-
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    public 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
-     */
-    public function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
-}
-
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/CalendarQueryParser.php b/vendor/sabre/dav/lib/Sabre/CalDAV/CalendarQueryParser.php
deleted file mode 100644
index 0a3472408..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/CalendarQueryParser.php
+++ /dev/null
@@ -1,298 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-use Sabre\VObject;
-
-/**
- * Parses the calendar-query report request body.
- *
- * Whoever designed this format, and the CalDAV equivalent even more so,
- * has no feel for design.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class CalendarQueryParser {
-
-    /**
-     * List of requested properties the client wanted
-     *
-     * @var array
-     */
-    public $requestedProperties;
-
-    /**
-     * List of property/component filters.
-     *
-     * @var array
-     */
-    public $filters;
-
-    /**
-     * This property will contain null if CALDAV:expand was not specified,
-     * otherwise it will contain an array with 2 elements (start, end). Each
-     * contain a DateTime object.
-     *
-     * If expand is specified, recurring calendar objects are to be expanded
-     * into their individual components, and only the components that fall
-     * within the specified time-range are to be returned.
-     *
-     * For more details, see rfc4791, section 9.6.5.
-     *
-     * @var null|array
-     */
-    public $expand;
-
-    /**
-     * DOM Document
-     *
-     * @var DOMDocument
-     */
-    protected $dom;
-
-    /**
-     * DOM XPath object
-     *
-     * @var DOMXPath
-     */
-    protected $xpath;
-
-    /**
-     * Creates the parser
-     *
-     * @param \DOMDocument $dom
-     */
-    public function __construct(\DOMDocument $dom) {
-
-        $this->dom = $dom;
-        $this->xpath = new \DOMXPath($dom);
-        $this->xpath->registerNameSpace('cal',Plugin::NS_CALDAV);
-        $this->xpath->registerNameSpace('dav','urn:DAV');
-
-    }
-
-    /**
-     * Parses the request.
-     *
-     * @return void
-     */
-    public function parse() {
-
-        $filterNode = null;
-
-        $filter = $this->xpath->query('/cal:calendar-query/cal:filter');
-        if ($filter->length !== 1) {
-            throw new \Sabre\DAV\Exception\BadRequest('Only one filter element is allowed');
-        }
-
-        $compFilters = $this->parseCompFilters($filter->item(0));
-        if (count($compFilters)!==1) {
-            throw new \Sabre\DAV\Exception\BadRequest('There must be exactly 1 top-level comp-filter.');
-        }
-
-        $this->filters = $compFilters[0];
-        $this->requestedProperties = array_keys(\Sabre\DAV\XMLUtil::parseProperties($this->dom->firstChild));
-
-        $expand = $this->xpath->query('/cal:calendar-query/dav:prop/cal:calendar-data/cal:expand');
-        if ($expand->length>0) {
-            $this->expand = $this->parseExpand($expand->item(0));
-        }
-
-
-    }
-
-    /**
-     * Parses all the 'comp-filter' elements from a node
-     *
-     * @param \DOMElement $parentNode
-     * @return array
-     */
-    protected function parseCompFilters(\DOMElement $parentNode) {
-
-        $compFilterNodes = $this->xpath->query('cal:comp-filter', $parentNode);
-        $result = array();
-
-        for($ii=0; $ii < $compFilterNodes->length; $ii++) {
-
-            $compFilterNode = $compFilterNodes->item($ii);
-
-            $compFilter = array();
-            $compFilter['name'] = $compFilterNode->getAttribute('name');
-            $compFilter['is-not-defined'] = $this->xpath->query('cal:is-not-defined', $compFilterNode)->length>0;
-            $compFilter['comp-filters'] = $this->parseCompFilters($compFilterNode);
-            $compFilter['prop-filters'] = $this->parsePropFilters($compFilterNode);
-            $compFilter['time-range'] = $this->parseTimeRange($compFilterNode);
-
-            if ($compFilter['time-range'] && !in_array($compFilter['name'],array(
-                'VEVENT',
-                'VTODO',
-                'VJOURNAL',
-                'VFREEBUSY',
-                'VALARM',
-            ))) {
-                throw new \Sabre\DAV\Exception\BadRequest('The time-range filter is not defined for the ' . $compFilter['name'] . ' component');
-            };
-
-            $result[] = $compFilter;
-
-        }
-
-        return $result;
-
-    }
-
-    /**
-     * Parses all the prop-filter elements from a node
-     *
-     * @param \DOMElement $parentNode
-     * @return array
-     */
-    protected function parsePropFilters(\DOMElement $parentNode) {
-
-        $propFilterNodes = $this->xpath->query('cal:prop-filter', $parentNode);
-        $result = array();
-
-        for ($ii=0; $ii < $propFilterNodes->length; $ii++) {
-
-            $propFilterNode = $propFilterNodes->item($ii);
-            $propFilter = array();
-            $propFilter['name'] = $propFilterNode->getAttribute('name');
-            $propFilter['is-not-defined'] = $this->xpath->query('cal:is-not-defined', $propFilterNode)->length>0;
-            $propFilter['param-filters'] = $this->parseParamFilters($propFilterNode);
-            $propFilter['text-match'] = $this->parseTextMatch($propFilterNode);
-            $propFilter['time-range'] = $this->parseTimeRange($propFilterNode);
-
-            $result[] = $propFilter;
-
-        }
-
-        return $result;
-
-    }
-
-    /**
-     * Parses the param-filter element
-     *
-     * @param \DOMElement $parentNode
-     * @return array
-     */
-    protected function parseParamFilters(\DOMElement $parentNode) {
-
-        $paramFilterNodes = $this->xpath->query('cal:param-filter', $parentNode);
-        $result = array();
-
-        for($ii=0;$ii<$paramFilterNodes->length;$ii++) {
-
-            $paramFilterNode = $paramFilterNodes->item($ii);
-            $paramFilter = array();
-            $paramFilter['name'] = $paramFilterNode->getAttribute('name');
-            $paramFilter['is-not-defined'] = $this->xpath->query('cal:is-not-defined', $paramFilterNode)->length>0;
-            $paramFilter['text-match'] = $this->parseTextMatch($paramFilterNode);
-
-            $result[] = $paramFilter;
-
-        }
-
-        return $result;
-
-    }
-
-    /**
-     * Parses the text-match element
-     *
-     * @param \DOMElement $parentNode
-     * @return array|null
-     */
-    protected function parseTextMatch(\DOMElement $parentNode) {
-
-        $textMatchNodes = $this->xpath->query('cal:text-match', $parentNode);
-
-        if ($textMatchNodes->length === 0)
-            return null;
-
-        $textMatchNode = $textMatchNodes->item(0);
-        $negateCondition = $textMatchNode->getAttribute('negate-condition');
-        $negateCondition = $negateCondition==='yes';
-        $collation = $textMatchNode->getAttribute('collation');
-        if (!$collation) $collation = 'i;ascii-casemap';
-
-        return array(
-            'negate-condition' => $negateCondition,
-            'collation' => $collation,
-            'value' => $textMatchNode->nodeValue
-        );
-
-    }
-
-    /**
-     * Parses the time-range element
-     *
-     * @param \DOMElement $parentNode
-     * @return array|null
-     */
-    protected function parseTimeRange(\DOMElement $parentNode) {
-
-        $timeRangeNodes = $this->xpath->query('cal:time-range', $parentNode);
-        if ($timeRangeNodes->length === 0) {
-            return null;
-        }
-
-        $timeRangeNode = $timeRangeNodes->item(0);
-
-        if ($start = $timeRangeNode->getAttribute('start')) {
-            $start = VObject\DateTimeParser::parseDateTime($start);
-        } else {
-            $start = null;
-        }
-        if ($end = $timeRangeNode->getAttribute('end')) {
-            $end = VObject\DateTimeParser::parseDateTime($end);
-        } else {
-            $end = null;
-        }
-
-        if (!is_null($start) && !is_null($end) && $end <= $start) {
-            throw new \Sabre\DAV\Exception\BadRequest('The end-date must be larger than the start-date in the time-range filter');
-        }
-
-        return array(
-            'start' => $start,
-            'end' => $end,
-        );
-
-    }
-
-    /**
-     * Parses the CALDAV:expand element
-     *
-     * @param \DOMElement $parentNode
-     * @return void
-     */
-    protected function parseExpand(\DOMElement $parentNode) {
-
-        $start = $parentNode->getAttribute('start');
-        if(!$start) {
-            throw new \Sabre\DAV\Exception\BadRequest('The "start" attribute is required for the CALDAV:expand element');
-        }
-        $start = VObject\DateTimeParser::parseDateTime($start);
-
-        $end = $parentNode->getAttribute('end');
-        if(!$end) {
-            throw new \Sabre\DAV\Exception\BadRequest('The "end" attribute is required for the CALDAV:expand element');
-        }
-
-        $end = VObject\DateTimeParser::parseDateTime($end);
-
-        if ($end <= $start) {
-            throw new \Sabre\DAV\Exception\BadRequest('The end-date must be larger than the start-date in the expand element.');
-        }
-
-        return array(
-            'start' => $start,
-            'end' => $end,
-        );
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/CalendarQueryValidator.php b/vendor/sabre/dav/lib/Sabre/CalDAV/CalendarQueryValidator.php
deleted file mode 100644
index 494aed1a7..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/CalendarQueryValidator.php
+++ /dev/null
@@ -1,392 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-use Sabre\VObject;
-use DateTime;
-
-/**
- * CalendarQuery Validator
- *
- * This class is responsible for checking if an iCalendar object matches a set
- * of filters. The main function to do this is 'validate'.
- *
- * This is used to determine which icalendar objects should be returned for a
- * calendar-query REPORT request.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class CalendarQueryValidator {
-
-    /**
-     * Verify if a list of filters applies to the calendar data object
-     *
-     * The list of filters must be formatted as parsed by \Sabre\CalDAV\CalendarQueryParser
-     *
-     * @param VObject\Component $vObject
-     * @param array $filters
-     * @return bool
-     */
-    public function validate(VObject\Component $vObject,array $filters) {
-
-        // The top level object is always a component filter.
-        // We'll parse it manually, as it's pretty simple.
-        if ($vObject->name !== $filters['name']) {
-            return false;
-        }
-
-        return
-            $this->validateCompFilters($vObject, $filters['comp-filters']) &&
-            $this->validatePropFilters($vObject, $filters['prop-filters']);
-
-
-    }
-
-    /**
-     * This method checks the validity of comp-filters.
-     *
-     * A list of comp-filters needs to be specified. Also the parent of the
-     * component we're checking should be specified, not the component to check
-     * itself.
-     *
-     * @param VObject\Component $parent
-     * @param array $filters
-     * @return bool
-     */
-    protected function validateCompFilters(VObject\Component $parent, array $filters) {
-
-        foreach($filters as $filter) {
-
-            $isDefined = isset($parent->$filter['name']);
-
-            if ($filter['is-not-defined']) {
-
-                if ($isDefined) {
-                    return false;
-                } else {
-                    continue;
-                }
-
-            }
-            if (!$isDefined) {
-                return false;
-            }
-
-            if ($filter['time-range']) {
-                foreach($parent->$filter['name'] as $subComponent) {
-                    if ($this->validateTimeRange($subComponent, $filter['time-range']['start'], $filter['time-range']['end'])) {
-                        continue 2;
-                    }
-                }
-                return false;
-            }
-
-            if (!$filter['comp-filters'] && !$filter['prop-filters']) {
-                continue;
-            }
-
-            // If there are sub-filters, we need to find at least one component
-            // for which the subfilters hold true.
-            foreach($parent->$filter['name'] as $subComponent) {
-
-                if (
-                    $this->validateCompFilters($subComponent, $filter['comp-filters']) &&
-                    $this->validatePropFilters($subComponent, $filter['prop-filters'])) {
-                        // We had a match, so this comp-filter succeeds
-                        continue 2;
-                }
-
-            }
-
-            // If we got here it means there were sub-comp-filters or
-            // sub-prop-filters and there was no match. This means this filter
-            // needs to return false.
-            return false;
-
-        }
-
-        // If we got here it means we got through all comp-filters alive so the
-        // filters were all true.
-        return true;
-
-    }
-
-    /**
-     * This method checks the validity of prop-filters.
-     *
-     * A list of prop-filters needs to be specified. Also the parent of the
-     * property we're checking should be specified, not the property to check
-     * itself.
-     *
-     * @param VObject\Component $parent
-     * @param array $filters
-     * @return bool
-     */
-    protected function validatePropFilters(VObject\Component $parent, array $filters) {
-
-        foreach($filters as $filter) {
-
-            $isDefined = isset($parent->$filter['name']);
-
-            if ($filter['is-not-defined']) {
-
-                if ($isDefined) {
-                    return false;
-                } else {
-                    continue;
-                }
-
-            }
-            if (!$isDefined) {
-                return false;
-            }
-
-            if ($filter['time-range']) {
-                foreach($parent->$filter['name'] as $subComponent) {
-                    if ($this->validateTimeRange($subComponent, $filter['time-range']['start'], $filter['time-range']['end'])) {
-                        continue 2;
-                    }
-                }
-                return false;
-            }
-
-            if (!$filter['param-filters'] && !$filter['text-match']) {
-                continue;
-            }
-
-            // If there are sub-filters, we need to find at least one property
-            // for which the subfilters hold true.
-            foreach($parent->$filter['name'] as $subComponent) {
-
-                if(
-                    $this->validateParamFilters($subComponent, $filter['param-filters']) &&
-                    (!$filter['text-match'] || $this->validateTextMatch($subComponent, $filter['text-match']))
-                ) {
-                    // We had a match, so this prop-filter succeeds
-                    continue 2;
-                }
-
-            }
-
-            // If we got here it means there were sub-param-filters or
-            // text-match filters and there was no match. This means the
-            // filter needs to return false.
-            return false;
-
-        }
-
-        // If we got here it means we got through all prop-filters alive so the
-        // filters were all true.
-        return true;
-
-    }
-
-    /**
-     * This method checks the validity of param-filters.
-     *
-     * A list of param-filters needs to be specified. Also the parent of the
-     * parameter we're checking should be specified, not the parameter to check
-     * itself.
-     *
-     * @param VObject\Property $parent
-     * @param array $filters
-     * @return bool
-     */
-    protected function validateParamFilters(VObject\Property $parent, array $filters) {
-
-        foreach($filters as $filter) {
-
-            $isDefined = isset($parent[$filter['name']]);
-
-            if ($filter['is-not-defined']) {
-
-                if ($isDefined) {
-                    return false;
-                } else {
-                    continue;
-                }
-
-            }
-            if (!$isDefined) {
-                return false;
-            }
-
-            if (!$filter['text-match']) {
-                continue;
-            }
-
-            if (version_compare(VObject\Version::VERSION, '3.0.0beta1', '>=')) {
-
-                // If there are sub-filters, we need to find at least one parameter
-                // for which the subfilters hold true.
-                foreach($parent[$filter['name']]->getParts() as $subParam) {
-
-                    if($this->validateTextMatch($subParam,$filter['text-match'])) {
-                        // We had a match, so this param-filter succeeds
-                        continue 2;
-                    }
-
-                }
-
-            } else {
-
-                // If there are sub-filters, we need to find at least one parameter
-                // for which the subfilters hold true.
-                foreach($parent[$filter['name']] as $subParam) {
-
-                    if($this->validateTextMatch($subParam,$filter['text-match'])) {
-                        // We had a match, so this param-filter succeeds
-                        continue 2;
-                    }
-
-                }
-
-            }
-
-            // If we got here it means there was a text-match filter and there
-            // were no matches. This means the filter needs to return false.
-            return false;
-
-        }
-
-        // If we got here it means we got through all param-filters alive so the
-        // filters were all true.
-        return true;
-
-    }
-
-    /**
-     * This method checks the validity of a text-match.
-     *
-     * A single text-match should be specified as well as the specific property
-     * or parameter we need to validate.
-     *
-     * @param VObject\Node|string $check Value to check against.
-     * @param array $textMatch
-     * @return bool
-     */
-    protected function validateTextMatch($check, array $textMatch) {
-
-        if ($check instanceof VObject\Node) {
-            $check = (string)$check;
-        }
-
-        $isMatching = \Sabre\DAV\StringUtil::textMatch($check, $textMatch['value'], $textMatch['collation']);
-
-        return ($textMatch['negate-condition'] xor $isMatching);
-
-    }
-
-    /**
-     * Validates if a component matches the given time range.
-     *
-     * This is all based on the rules specified in rfc4791, which are quite
-     * complex.
-     *
-     * @param VObject\Node $component
-     * @param DateTime $start
-     * @param DateTime $end
-     * @return bool
-     */
-    protected function validateTimeRange(VObject\Node $component, $start, $end) {
-
-        if (is_null($start)) {
-            $start = new DateTime('1900-01-01');
-        }
-        if (is_null($end)) {
-            $end = new DateTime('3000-01-01');
-        }
-
-        switch($component->name) {
-
-            case 'VEVENT' :
-            case 'VTODO' :
-            case 'VJOURNAL' :
-
-                return $component->isInTimeRange($start, $end);
-
-            case 'VALARM' :
-
-                // If the valarm is wrapped in a recurring event, we need to
-                // expand the recursions, and validate each.
-                //
-                // Our datamodel doesn't easily allow us to do this straight
-                // in the VALARM component code, so this is a hack, and an
-                // expensive one too.
-                if ($component->parent->name === 'VEVENT' && $component->parent->RRULE) {
-
-                    // Fire up the iterator!
-                    $it = new VObject\RecurrenceIterator($component->parent->parent, (string)$component->parent->UID);
-                    while($it->valid()) {
-                        $expandedEvent = $it->getEventObject();
-
-                        // We need to check from these expanded alarms, which
-                        // one is the first to trigger. Based on this, we can
-                        // determine if we can 'give up' expanding events.
-                        $firstAlarm = null;
-                        if ($expandedEvent->VALARM !== null) {
-                            foreach($expandedEvent->VALARM as $expandedAlarm) {
-
-                                $effectiveTrigger = $expandedAlarm->getEffectiveTriggerTime();
-                                if ($expandedAlarm->isInTimeRange($start, $end)) {
-                                    return true;
-                                }
-
-                                if ((string)$expandedAlarm->TRIGGER['VALUE'] === 'DATE-TIME') {
-                                    // This is an alarm with a non-relative trigger
-                                    // time, likely created by a buggy client. The
-                                    // implication is that every alarm in this
-                                    // recurring event trigger at the exact same
-                                    // time. It doesn't make sense to traverse
-                                    // further.
-                                } else {
-                                    // We store the first alarm as a means to
-                                    // figure out when we can stop traversing.
-                                    if (!$firstAlarm || $effectiveTrigger < $firstAlarm) {
-                                        $firstAlarm = $effectiveTrigger;
-                                    }
-                                }
-                            }
-                        }
-                        if (is_null($firstAlarm)) {
-                            // No alarm was found.
-                            //
-                            // Or technically: No alarm that will change for
-                            // every instance of the recurrence was found,
-                            // which means we can assume there was no match.
-                            return false;
-                        }
-                        if ($firstAlarm > $end) {
-                            return false;
-                        }
-                        $it->next();
-                    }
-                    return false;
-                } else {
-                    return $component->isInTimeRange($start, $end);
-                }
-
-            case 'VFREEBUSY' :
-                throw new \Sabre\DAV\Exception\NotImplemented('time-range filters are currently not supported on ' . $component->name . ' components');
-
-            case 'COMPLETED' :
-            case 'CREATED' :
-            case 'DTEND' :
-            case 'DTSTAMP' :
-            case 'DTSTART' :
-            case 'DUE' :
-            case 'LAST-MODIFIED' :
-                return ($start <= $component->getDateTime() && $end >= $component->getDateTime());
-
-
-
-            default :
-                throw new \Sabre\DAV\Exception\BadRequest('You cannot create a time-range filter on a ' . $component->name . ' component');
-
-        }
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/CalendarRootNode.php b/vendor/sabre/dav/lib/Sabre/CalDAV/CalendarRootNode.php
deleted file mode 100644
index 4f72ad444..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/CalendarRootNode.php
+++ /dev/null
@@ -1,77 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-use Sabre\DAVACL\PrincipalBackend;
-
-/**
- * Calendars collection
- *
- * This object is responsible for generating a list of calendar-homes for each
- * user.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class CalendarRootNode extends \Sabre\DAVACL\AbstractPrincipalCollection {
-
-    /**
-     * CalDAV backend
-     *
-     * @var Sabre\CalDAV\Backend\BackendInterface
-     */
-    protected $caldavBackend;
-
-    /**
-     * Constructor
-     *
-     * This constructor needs both an authentication and a caldav backend.
-     *
-     * By default this class will show a list of calendar collections for
-     * principals in the 'principals' collection. If your main principals are
-     * actually located in a different path, use the $principalPrefix argument
-     * to override this.
-     *
-     * @param PrincipalBackend\BackendInterface $principalBackend
-     * @param Backend\BackendInterface $caldavBackend
-     * @param string $principalPrefix
-     */
-    public function __construct(PrincipalBackend\BackendInterface $principalBackend,Backend\BackendInterface $caldavBackend, $principalPrefix = 'principals') {
-
-        parent::__construct($principalBackend, $principalPrefix);
-        $this->caldavBackend = $caldavBackend;
-
-    }
-
-    /**
-     * Returns the nodename
-     *
-     * We're overriding this, because the default will be the 'principalPrefix',
-     * and we want it to be Sabre\CalDAV\Plugin::CALENDAR_ROOT
-     *
-     * @return string
-     */
-    public function getName() {
-
-        return Plugin::CALENDAR_ROOT;
-
-    }
-
-    /**
-     * This method returns a node for a principal.
-     *
-     * The passed array contains principal information, and is guaranteed to
-     * at least contain a uri item. Other properties may or may not be
-     * supplied by the authentication backend.
-     *
-     * @param array $principal
-     * @return \Sabre\DAV\INode
-     */
-    public function getChildForPrincipal(array $principal) {
-
-        return new UserCalendars($this->caldavBackend, $principal);
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Exception/InvalidComponentType.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Exception/InvalidComponentType.php
deleted file mode 100644
index f2a64e33f..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Exception/InvalidComponentType.php
+++ /dev/null
@@ -1,35 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Exception;
-
-use Sabre\DAV;
-use Sabre\CalDAV;
-
-/**
- * InvalidComponentType
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class InvalidComponentType extends DAV\Exception\Forbidden {
-
-    /**
-     * Adds in extra information in the xml response.
-     *
-     * This method adds the {CALDAV:}supported-calendar-component as defined in rfc4791
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $errorNode
-     * @return void
-     */
-    public function serialize(DAV\Server $server, \DOMElement $errorNode) {
-
-        $doc = $errorNode->ownerDocument;
-
-        $np = $doc->createElementNS(CalDAV\Plugin::NS_CALDAV,'cal:supported-calendar-component');
-        $errorNode->appendChild($np);
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/ICSExportPlugin.php b/vendor/sabre/dav/lib/Sabre/CalDAV/ICSExportPlugin.php
deleted file mode 100644
index bba7fbd5a..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/ICSExportPlugin.php
+++ /dev/null
@@ -1,142 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-use Sabre\DAV;
-use Sabre\VObject;
-
-/**
- * ICS Exporter
- *
- * This plugin adds the ability to export entire calendars as .ics files.
- * This is useful for clients that don't support CalDAV yet. They often do
- * support ics files.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class ICSExportPlugin extends DAV\ServerPlugin {
-
-    /**
-     * Reference to Server class
-     *
-     * @var \Sabre\DAV\Server
-     */
-    protected $server;
-
-    /**
-     * Initializes the plugin and registers event handlers
-     *
-     * @param \Sabre\DAV\Server $server
-     * @return void
-     */
-    public function initialize(DAV\Server $server) {
-
-        $this->server = $server;
-        $this->server->subscribeEvent('beforeMethod',array($this,'beforeMethod'), 90);
-
-    }
-
-    /**
-     * 'beforeMethod' event handles. This event handles intercepts GET requests ending
-     * with ?export
-     *
-     * @param string $method
-     * @param string $uri
-     * @return bool
-     */
-    public function beforeMethod($method, $uri) {
-
-        if ($method!='GET') return;
-        if ($this->server->httpRequest->getQueryString()!='export') return;
-
-        // splitting uri
-        list($uri) = explode('?',$uri,2);
-
-        $node = $this->server->tree->getNodeForPath($uri);
-
-        if (!($node instanceof Calendar)) return;
-
-        // Checking ACL, if available.
-        if ($aclPlugin = $this->server->getPlugin('acl')) {
-            $aclPlugin->checkPrivileges($uri, '{DAV:}read');
-        }
-
-        $this->server->httpResponse->setHeader('Content-Type','text/calendar');
-        $this->server->httpResponse->sendStatus(200);
-
-        $nodes = $this->server->getPropertiesForPath($uri, array(
-            '{' . Plugin::NS_CALDAV . '}calendar-data',
-        ),1);
-
-        $this->server->httpResponse->sendBody($this->generateICS($nodes));
-
-        // Returning false to break the event chain
-        return false;
-
-    }
-
-    /**
-     * Merges all calendar objects, and builds one big ics export
-     *
-     * @param array $nodes
-     * @return string
-     */
-    public function generateICS(array $nodes) {
-
-        $calendar = new VObject\Component\VCalendar();
-        $calendar->version = '2.0';
-        if (DAV\Server::$exposeVersion) {
-            $calendar->prodid = '-//SabreDAV//SabreDAV ' . DAV\Version::VERSION . '//EN';
-        } else {
-            $calendar->prodid = '-//SabreDAV//SabreDAV//EN';
-        }
-        $calendar->calscale = 'GREGORIAN';
-
-        $collectedTimezones = array();
-
-        $timezones = array();
-        $objects = array();
-
-        foreach($nodes as $node) {
-
-            if (!isset($node[200]['{' . Plugin::NS_CALDAV . '}calendar-data'])) {
-                continue;
-            }
-            $nodeData = $node[200]['{' . Plugin::NS_CALDAV . '}calendar-data'];
-
-            $nodeComp = VObject\Reader::read($nodeData);
-
-            foreach($nodeComp->children() as $child) {
-
-                switch($child->name) {
-                    case 'VEVENT' :
-                    case 'VTODO' :
-                    case 'VJOURNAL' :
-                        $objects[] = $child;
-                        break;
-
-                    // VTIMEZONE is special, because we need to filter out the duplicates
-                    case 'VTIMEZONE' :
-                        // Naively just checking tzid.
-                        if (in_array((string)$child->TZID, $collectedTimezones)) continue;
-
-                        $timezones[] = $child;
-                        $collectedTimezones[] = $child->TZID;
-                        break;
-
-                }
-
-            }
-
-        }
-
-        foreach($timezones as $tz) $calendar->add($tz);
-        foreach($objects as $obj) $calendar->add($obj);
-
-        return $calendar->serialize();
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/ICalendar.php b/vendor/sabre/dav/lib/Sabre/CalDAV/ICalendar.php
deleted file mode 100644
index 0f0547046..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/ICalendar.php
+++ /dev/null
@@ -1,36 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-use Sabre\DAV;
-
-/**
- * Calendar interface
- *
- * Implement this interface to allow a node to be recognized as an calendar.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-interface ICalendar extends DAV\ICollection {
-
-    /**
-     * Performs a calendar-query on the contents of this calendar.
-     *
-     * The calendar-query is defined in RFC4791 : CalDAV. Using the
-     * calendar-query it is possible for a client to request a specific set of
-     * object, based on contents of iCalendar properties, date-ranges and
-     * iCalendar component types (VTODO, VEVENT).
-     *
-     * This method should just return a list of (relative) urls that match this
-     * query.
-     *
-     * The list of filters are specified as an array. The exact array is
-     * documented by \Sabre\CalDAV\CalendarQueryParser.
-     *
-     * @param array $filters
-     * @return array
-     */
-    public function calendarQuery(array $filters);
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/ICalendarObject.php b/vendor/sabre/dav/lib/Sabre/CalDAV/ICalendarObject.php
deleted file mode 100644
index 0776abff0..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/ICalendarObject.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-use Sabre\DAV;
-
-/**
- * CalendarObject interface
- *
- * Extend the ICalendarObject interface to allow your custom nodes to be picked up as
- * CalendarObjects.
- *
- * Calendar objects are resources such as Events, Todo's or Journals.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-interface ICalendarObject extends DAV\IFile {
-
-}
-
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/IShareableCalendar.php b/vendor/sabre/dav/lib/Sabre/CalDAV/IShareableCalendar.php
deleted file mode 100644
index 4dd62e5c6..000000000
--- a/vendor/sabre/dav/lib/Sabre/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) 2007-2014 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/Sabre/CalDAV/ISharedCalendar.php b/vendor/sabre/dav/lib/Sabre/CalDAV/ISharedCalendar.php
deleted file mode 100644
index 917d1c498..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/ISharedCalendar.php
+++ /dev/null
@@ -1,36 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-/**
- * This interface represents a Calendar that is shared by a different user.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @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();
-
-    /**
-     * 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/Sabre/CalDAV/Notifications/Collection.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Collection.php
deleted file mode 100644
index 028b00d87..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Collection.php
+++ /dev/null
@@ -1,173 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Notifications;
-
-use Sabre\DAV;
-use Sabre\CalDAV;
-use Sabre\DAVACL;
-
-/**
- * This node represents a list of notifications.
- *
- * It provides no additional functionality, but you must implement this
- * interface to allow the Notifications plugin to mark the collection
- * as a notifications collection.
- *
- * This collection should only return Sabre\CalDAV\Notifications\INode nodes as
- * its children.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class Collection extends DAV\Collection implements ICollection, DAVACL\IACL {
-
-    /**
-     * The notification backend
-     *
-     * @var Sabre\CalDAV\Backend\NotificationSupport
-     */
-    protected $caldavBackend;
-
-    /**
-     * Principal uri
-     *
-     * @var string
-     */
-    protected $principalUri;
-
-    /**
-     * Constructor
-     *
-     * @param CalDAV\Backend\NotificationSupport $caldavBackend
-     * @param string $principalUri
-     */
-    public function __construct(CalDAV\Backend\NotificationSupport $caldavBackend, $principalUri) {
-
-        $this->caldavBackend = $caldavBackend;
-        $this->principalUri = $principalUri;
-
-    }
-
-    /**
-     * Returns all notifications for a principal
-     *
-     * @return array
-     */
-    public function getChildren() {
-
-        $children = array();
-        $notifications = $this->caldavBackend->getNotificationsForPrincipal($this->principalUri);
-
-        foreach($notifications as $notification) {
-
-            $children[] = new Node(
-                $this->caldavBackend,
-                $this->principalUri,
-                $notification
-            );
-        }
-
-        return $children;
-
-    }
-
-    /**
-     * Returns the name of this object
-     *
-     * @return string
-     */
-    public function getName() {
-
-        return 'notifications';
-
-    }
-
-    /**
-     * Returns the owner principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public function getOwner() {
-
-        return $this->principalUri;
-
-    }
-
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public 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
-     */
-    public function getACL() {
-
-        return array(
-            array(
-                'principal' => $this->getOwner(),
-                'privilege' => '{DAV:}read',
-                'protected' => true,
-            ),
-            array(
-                '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
-     */
-    public 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
-     */
-    public function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/ICollection.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/ICollection.php
deleted file mode 100644
index 26e13b211..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/ICollection.php
+++ /dev/null
@@ -1,24 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Notifications;
-
-use Sabre\DAV;
-
-/**
- * This node represents a list of notifications.
- *
- * It provides no additional functionality, but you must implement this
- * interface to allow the Notifications plugin to mark the collection
- * as a notifications collection.
- *
- * This collection should only return Sabre\CalDAV\Notifications\INode nodes as
- * its children.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-interface ICollection extends DAV\ICollection {
-
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/INode.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/INode.php
deleted file mode 100644
index cd7fc5798..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/INode.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Notifications;
-
-/**
- * This node represents a single notification.
- *
- * The signature is mostly identical to that of Sabre\DAV\IFile, but the get() method
- * MUST return an xml document that matches the requirements of the
- * 'caldav-notifications.txt' spec.
- *
- * For a complete example, check out the Notification class, which contains
- * some helper functions.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-interface INode {
-
-    /**
-     * This method must return an xml element, using the
-     * Sabre\CalDAV\Notifications\INotificationType classes.
-     *
-     * @return INotificationType
-     */
-    function getNotificationType();
-
-    /**
-     * Returns the etag for the notification.
-     *
-     * The etag must be surrounded by litteral double-quotes.
-     *
-     * @return string
-     */
-    function getETag();
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/INotificationType.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/INotificationType.php
deleted file mode 100644
index b646399b9..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/INotificationType.php
+++ /dev/null
@@ -1,44 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Notifications;
-use Sabre\DAV;
-
-/**
- * This interface reflects a single notification type.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-interface INotificationType extends DAV\PropertyInterface {
-
-    /**
-     * This method serializes the entire notification, as it is used in the
-     * response body.
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $node
-     * @return void
-     */
-    function serializeBody(DAV\Server $server, \DOMElement $node);
-
-    /**
-     * Returns a unique id for this notification
-     *
-     * This is just the base url. This should generally be some kind of unique
-     * id.
-     *
-     * @return string
-     */
-    function getId();
-
-    /**
-     * Returns the ETag for this notification.
-     *
-     * The ETag must be surrounded by literal double-quotes.
-     *
-     * @return string
-     */
-    function getETag();
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Node.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Node.php
deleted file mode 100644
index 6367e9388..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Node.php
+++ /dev/null
@@ -1,192 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Notifications;
-
-use Sabre\DAV;
-use Sabre\CalDAV;
-use Sabre\DAVACL;
-
-/**
- * This node represents a single notification.
- *
- * The signature is mostly identical to that of Sabre\DAV\IFile, but the get() method
- * MUST return an xml document that matches the requirements of the
- * 'caldav-notifications.txt' spec.
-
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class Node extends DAV\File implements INode, DAVACL\IACL {
-
-    /**
-     * The notification backend
-     *
-     * @var Sabre\CalDAV\Backend\NotificationSupport
-     */
-    protected $caldavBackend;
-
-    /**
-     * The actual notification
-     *
-     * @var Sabre\CalDAV\Notifications\INotificationType
-     */
-    protected $notification;
-
-    /**
-     * Owner principal of the notification
-     *
-     * @var string
-     */
-    protected $principalUri;
-
-    /**
-     * Constructor
-     *
-     * @param CalDAV\Backend\NotificationSupport $caldavBackend
-     * @param string $principalUri
-     * @param CalDAV\Notifications\INotificationType $notification
-     */
-    public function __construct(CalDAV\Backend\NotificationSupport $caldavBackend, $principalUri, INotificationType $notification) {
-
-        $this->caldavBackend = $caldavBackend;
-        $this->principalUri = $principalUri;
-        $this->notification = $notification;
-
-    }
-
-    /**
-     * Returns the path name for this notification
-     *
-     * @return id
-     */
-    public function getName() {
-
-        return $this->notification->getId() . '.xml';
-
-    }
-
-    /**
-     * Returns the etag for the notification.
-     *
-     * The etag must be surrounded by litteral double-quotes.
-     *
-     * @return string
-     */
-    public function getETag() {
-
-        return $this->notification->getETag();
-
-    }
-
-    /**
-     * This method must return an xml element, using the
-     * Sabre\CalDAV\Notifications\INotificationType classes.
-     *
-     * @return INotificationType
-     */
-    public function getNotificationType() {
-
-        return $this->notification;
-
-    }
-
-    /**
-     * Deletes this notification
-     *
-     * @return void
-     */
-    public function delete() {
-
-        $this->caldavBackend->deleteNotification($this->getOwner(), $this->notification);
-
-    }
-
-    /**
-     * Returns the owner principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public function getOwner() {
-
-        return $this->principalUri;
-
-    }
-
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public 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
-     */
-    public function getACL() {
-
-        return array(
-            array(
-                'principal' => $this->getOwner(),
-                'privilege' => '{DAV:}read',
-                'protected' => true,
-            ),
-            array(
-                '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
-     */
-    public 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
-     */
-    public function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Notification/Invite.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Notification/Invite.php
deleted file mode 100644
index 8d6974d45..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Notification/Invite.php
+++ /dev/null
@@ -1,324 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Notifications\Notification;
-
-use Sabre\CalDAV\SharingPlugin as SharingPlugin;
-use Sabre\DAV;
-use Sabre\CalDAV;
-
-/**
- * This class represents the cs:invite-notification notification element.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class Invite extends DAV\Property implements CalDAV\Notifications\INotificationType {
-
-    /**
-     * A unique id for the message
-     *
-     * @var string
-     */
-    protected $id;
-
-    /**
-     * Timestamp of the notification
-     *
-     * @var DateTime
-     */
-    protected $dtStamp;
-
-    /**
-     * A url to the recipient of the notification. This can be an email
-     * address (mailto:), or a principal url.
-     *
-     * @var string
-     */
-    protected $href;
-
-    /**
-     * The type of message, see the SharingPlugin::STATUS_* constants.
-     *
-     * @var int
-     */
-    protected $type;
-
-    /**
-     * True if access to a calendar is read-only.
-     *
-     * @var bool
-     */
-    protected $readOnly;
-
-    /**
-     * A url to the shared calendar.
-     *
-     * @var string
-     */
-    protected $hostUrl;
-
-    /**
-     * Url to the sharer of the calendar
-     *
-     * @var string
-     */
-    protected $organizer;
-
-    /**
-     * The name of the sharer.
-     *
-     * @var string
-     */
-    protected $commonName;
-
-    /**
-     * The name of the sharer.
-     *
-     * @var string
-     */
-    protected $firstName;
-
-    /**
-     * The name of the sharer.
-     *
-     * @var string
-     */
-    protected $lastName;
-
-    /**
-     * A description of the share request
-     *
-     * @var string
-     */
-    protected $summary;
-
-    /**
-     * The Etag for the notification
-     *
-     * @var string
-     */
-    protected $etag;
-
-    /**
-     * The list of supported components
-     *
-     * @var Sabre\CalDAV\Property\SupportedCalendarComponentSet
-     */
-    protected $supportedComponents;
-
-    /**
-     * Creates the Invite notification.
-     *
-     * This constructor receives an array with the following elements:
-     *
-     *   * id           - A unique id
-     *   * etag         - The etag
-     *   * dtStamp      - A DateTime object with a timestamp for the notification.
-     *   * type         - The type of notification, see SharingPlugin::STATUS_*
-     *                    constants for details.
-     *   * readOnly     - This must be set to true, if this is an invite for
-     *                    read-only access to a calendar.
-     *   * hostUrl      - A url to the shared calendar.
-     *   * organizer    - Url to the sharer principal.
-     *   * commonName   - The real name of the sharer (optional).
-     *   * firstName    - The first name of the sharer (optional).
-     *   * lastName     - The last name of the sharer (optional).
-     *   * summary      - Description of the share, can be the same as the
-     *                    calendar, but may also be modified (optional).
-     *   * supportedComponents - An instance of
-     *                    Sabre\CalDAV\Property\SupportedCalendarComponentSet.
-     *                    This allows the client to determine which components
-     *                    will be supported in the shared calendar. This is
-     *                    also optional.
-     *
-     * @param array $values All the options
-     */
-    public function __construct(array $values) {
-
-        $required = array(
-            'id',
-            'etag',
-            'href',
-            'dtStamp',
-            'type',
-            'readOnly',
-            'hostUrl',
-            'organizer',
-        );
-        foreach($required as $item) {
-            if (!isset($values[$item])) {
-                throw new \InvalidArgumentException($item . ' is a required constructor option');
-            }
-        }
-
-        foreach($values as $key=>$value) {
-            if (!property_exists($this, $key)) {
-                throw new \InvalidArgumentException('Unknown option: ' . $key);
-            }
-            $this->$key = $value;
-        }
-
-    }
-
-    /**
-     * Serializes the notification as a single property.
-     *
-     * You should usually just encode the single top-level element of the
-     * notification.
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $node
-     * @return void
-     */
-    public function serialize(DAV\Server $server, \DOMElement $node) {
-
-        $prop = $node->ownerDocument->createElement('cs:invite-notification');
-        $node->appendChild($prop);
-
-    }
-
-    /**
-     * This method serializes the entire notification, as it is used in the
-     * response body.
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $node
-     * @return void
-     */
-    public function serializeBody(DAV\Server $server, \DOMElement $node) {
-
-        $doc = $node->ownerDocument;
-
-        $dt = $doc->createElement('cs:dtstamp');
-        $this->dtStamp->setTimezone(new \DateTimezone('GMT'));
-        $dt->appendChild($doc->createTextNode($this->dtStamp->format('Ymd\\THis\\Z')));
-        $node->appendChild($dt);
-
-        $prop = $doc->createElement('cs:invite-notification');
-        $node->appendChild($prop);
-
-        $uid = $doc->createElement('cs:uid');
-        $uid->appendChild( $doc->createTextNode($this->id) );
-        $prop->appendChild($uid);
-
-        $href = $doc->createElement('d:href');
-        $href->appendChild( $doc->createTextNode( $this->href ) );
-        $prop->appendChild($href);
-
-        $nodeName = null;
-        switch($this->type) {
-
-            case SharingPlugin::STATUS_ACCEPTED :
-                $nodeName = 'cs:invite-accepted';
-                break;
-            case SharingPlugin::STATUS_DECLINED :
-                $nodeName = 'cs:invite-declined';
-                break;
-            case SharingPlugin::STATUS_DELETED :
-                $nodeName = 'cs:invite-deleted';
-                break;
-            case SharingPlugin::STATUS_NORESPONSE :
-                $nodeName = 'cs:invite-noresponse';
-                break;
-
-        }
-        $prop->appendChild(
-            $doc->createElement($nodeName)
-        );
-        $hostHref = $doc->createElement('d:href', $server->getBaseUri() . $this->hostUrl);
-        $hostUrl  = $doc->createElement('cs:hosturl');
-        $hostUrl->appendChild($hostHref);
-        $prop->appendChild($hostUrl);
-
-        $access = $doc->createElement('cs:access');
-        if ($this->readOnly) {
-            $access->appendChild($doc->createElement('cs:read'));
-        } else {
-            $access->appendChild($doc->createElement('cs:read-write'));
-        }
-        $prop->appendChild($access);
-
-        $organizerUrl  = $doc->createElement('cs:organizer');
-        // If the organizer contains a 'mailto:' part, it means it should be
-        // treated as absolute.
-        if (strtolower(substr($this->organizer,0,7))==='mailto:') {
-            $organizerHref = new DAV\Property\Href($this->organizer, false);
-        } else {
-            $organizerHref = new DAV\Property\Href($this->organizer, true);
-        }
-        $organizerHref->serialize($server, $organizerUrl);
-
-        if ($this->commonName) {
-            $commonName = $doc->createElement('cs:common-name');
-            $commonName->appendChild($doc->createTextNode($this->commonName));
-            $organizerUrl->appendChild($commonName);
-
-            $commonNameOld = $doc->createElement('cs:organizer-cn');
-            $commonNameOld->appendChild($doc->createTextNode($this->commonName));
-            $prop->appendChild($commonNameOld);
-
-        }
-        if ($this->firstName) {
-            $firstName = $doc->createElement('cs:first-name');
-            $firstName->appendChild($doc->createTextNode($this->firstName));
-            $organizerUrl->appendChild($firstName);
-
-            $firstNameOld = $doc->createElement('cs:organizer-first');
-            $firstNameOld->appendChild($doc->createTextNode($this->firstName));
-            $prop->appendChild($firstNameOld);
-        }
-        if ($this->lastName) {
-            $lastName = $doc->createElement('cs:last-name');
-            $lastName->appendChild($doc->createTextNode($this->lastName));
-            $organizerUrl->appendChild($lastName);
-
-            $lastNameOld = $doc->createElement('cs:organizer-last');
-            $lastNameOld->appendChild($doc->createTextNode($this->lastName));
-            $prop->appendChild($lastNameOld);
-        }
-        $prop->appendChild($organizerUrl);
-
-        if ($this->summary) {
-            $summary = $doc->createElement('cs:summary');
-            $summary->appendChild($doc->createTextNode($this->summary));
-            $prop->appendChild($summary);
-        }
-        if ($this->supportedComponents) {
-
-            $xcomp = $doc->createElement('cal:supported-calendar-component-set');
-            $this->supportedComponents->serialize($server, $xcomp);
-            $prop->appendChild($xcomp);
-
-        }
-
-    }
-
-    /**
-     * Returns a unique id for this notification
-     *
-     * This is just the base url. This should generally be some kind of unique
-     * id.
-     *
-     * @return string
-     */
-    public function getId() {
-
-        return $this->id;
-
-    }
-
-    /**
-     * Returns the ETag for this notification.
-     *
-     * The ETag must be surrounded by literal double-quotes.
-     *
-     * @return string
-     */
-    public function getETag() {
-
-        return $this->etag;
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Notification/InviteReply.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Notification/InviteReply.php
deleted file mode 100644
index e40751346..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Notification/InviteReply.php
+++ /dev/null
@@ -1,218 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Notifications\Notification;
-
-use Sabre\CalDAV\SharingPlugin as SharingPlugin;
-use Sabre\DAV;
-use Sabre\CalDAV;
-
-/**
- * This class represents the cs:invite-reply notification element.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class InviteReply extends DAV\Property implements CalDAV\Notifications\INotificationType {
-
-    /**
-     * A unique id for the message
-     *
-     * @var string
-     */
-    protected $id;
-
-    /**
-     * Timestamp of the notification
-     *
-     * @var DateTime
-     */
-    protected $dtStamp;
-
-    /**
-     * The unique id of the notification this was a reply to.
-     *
-     * @var string
-     */
-    protected $inReplyTo;
-
-    /**
-     * A url to the recipient of the original (!) notification.
-     *
-     * @var string
-     */
-    protected $href;
-
-    /**
-     * The type of message, see the SharingPlugin::STATUS_ constants.
-     *
-     * @var int
-     */
-    protected $type;
-
-    /**
-     * A url to the shared calendar.
-     *
-     * @var string
-     */
-    protected $hostUrl;
-
-    /**
-     * A description of the share request
-     *
-     * @var string
-     */
-    protected $summary;
-
-    /**
-     * Notification Etag
-     *
-     * @var string
-     */
-    protected $etag;
-
-    /**
-     * Creates the Invite Reply Notification.
-     *
-     * This constructor receives an array with the following elements:
-     *
-     *   * id           - A unique id
-     *   * etag         - The etag
-     *   * dtStamp      - A DateTime object with a timestamp for the notification.
-     *   * inReplyTo    - This should refer to the 'id' of the notification
-     *                    this is a reply to.
-     *   * type         - The type of notification, see SharingPlugin::STATUS_*
-     *                    constants for details.
-     *   * hostUrl      - A url to the shared calendar.
-     *   * summary      - Description of the share, can be the same as the
-     *                    calendar, but may also be modified (optional).
-     */
-    public function __construct(array $values) {
-
-        $required = array(
-            'id',
-            'etag',
-            'href',
-            'dtStamp',
-            'inReplyTo',
-            'type',
-            'hostUrl',
-        );
-        foreach($required as $item) {
-            if (!isset($values[$item])) {
-                throw new \InvalidArgumentException($item . ' is a required constructor option');
-            }
-        }
-
-        foreach($values as $key=>$value) {
-            if (!property_exists($this, $key)) {
-                throw new \InvalidArgumentException('Unknown option: ' . $key);
-            }
-            $this->$key = $value;
-        }
-
-    }
-
-    /**
-     * Serializes the notification as a single property.
-     *
-     * You should usually just encode the single top-level element of the
-     * notification.
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $node
-     * @return void
-     */
-    public function serialize(DAV\Server $server, \DOMElement $node) {
-
-        $prop = $node->ownerDocument->createElement('cs:invite-reply');
-        $node->appendChild($prop);
-
-    }
-
-    /**
-     * This method serializes the entire notification, as it is used in the
-     * response body.
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $node
-     * @return void
-     */
-    public function serializeBody(DAV\Server $server, \DOMElement $node) {
-
-        $doc = $node->ownerDocument;
-
-        $dt = $doc->createElement('cs:dtstamp');
-        $this->dtStamp->setTimezone(new \DateTimezone('GMT'));
-        $dt->appendChild($doc->createTextNode($this->dtStamp->format('Ymd\\THis\\Z')));
-        $node->appendChild($dt);
-
-        $prop = $doc->createElement('cs:invite-reply');
-        $node->appendChild($prop);
-
-        $uid = $doc->createElement('cs:uid');
-        $uid->appendChild($doc->createTextNode($this->id));
-        $prop->appendChild($uid);
-
-        $inReplyTo = $doc->createElement('cs:in-reply-to');
-        $inReplyTo->appendChild( $doc->createTextNode($this->inReplyTo) );
-        $prop->appendChild($inReplyTo);
-
-        $href = $doc->createElement('d:href');
-        $href->appendChild( $doc->createTextNode($this->href) );
-        $prop->appendChild($href);
-
-        $nodeName = null;
-        switch($this->type) {
-
-            case SharingPlugin::STATUS_ACCEPTED :
-                $nodeName = 'cs:invite-accepted';
-                break;
-            case SharingPlugin::STATUS_DECLINED :
-                $nodeName = 'cs:invite-declined';
-                break;
-
-        }
-        $prop->appendChild(
-            $doc->createElement($nodeName)
-        );
-        $hostHref = $doc->createElement('d:href', $server->getBaseUri() . $this->hostUrl);
-        $hostUrl  = $doc->createElement('cs:hosturl');
-        $hostUrl->appendChild($hostHref);
-        $prop->appendChild($hostUrl);
-
-        if ($this->summary) {
-            $summary = $doc->createElement('cs:summary');
-            $summary->appendChild($doc->createTextNode($this->summary));
-            $prop->appendChild($summary);
-        }
-
-    }
-
-    /**
-     * Returns a unique id for this notification
-     *
-     * This is just the base url. This should generally be some kind of unique
-     * id.
-     *
-     * @return string
-     */
-    public function getId() {
-
-        return $this->id;
-
-    }
-
-    /**
-     * Returns the ETag for this notification.
-     *
-     * The ETag must be surrounded by literal double-quotes.
-     *
-     * @return string
-     */
-    public function getETag() {
-
-        return $this->etag;
-
-    }
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Notification/SystemStatus.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Notification/SystemStatus.php
deleted file mode 100644
index 608892dab..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Notifications/Notification/SystemStatus.php
+++ /dev/null
@@ -1,182 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Notifications\Notification;
-
-use Sabre\DAV;
-use Sabre\CalDAV;
-
-/**
- * SystemStatus notification
- *
- * This notification can be used to indicate to the user that the system is
- * down.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class SystemStatus extends DAV\Property implements CalDAV\Notifications\INotificationType {
-
-    const TYPE_LOW = 1;
-    const TYPE_MEDIUM = 2;
-    const TYPE_HIGH = 3;
-
-    /**
-     * A unique id
-     *
-     * @var string
-     */
-    protected $id;
-
-    /**
-     * The type of alert. This should be one of the TYPE_ constants.
-     *
-     * @var int
-     */
-    protected $type;
-
-    /**
-     * A human-readable description of the problem.
-     *
-     * @var string
-     */
-    protected $description;
-
-    /**
-     * A url to a website with more information for the user.
-     *
-     * @var string
-     */
-    protected $href;
-
-    /**
-     * Notification Etag
-     *
-     * @var string
-     */
-    protected $etag;
-
-    /**
-     * Creates the notification.
-     *
-     * Some kind of unique id should be provided. This is used to generate a
-     * url.
-     *
-     * @param string $id
-     * @param string $etag
-     * @param int $type
-     * @param string $description
-     * @param string $href
-     */
-    public function __construct($id, $etag, $type = self::TYPE_HIGH, $description = null, $href = null) {
-
-        $this->id = $id;
-        $this->type = $type;
-        $this->description = $description;
-        $this->href = $href;
-        $this->etag = $etag;
-
-    }
-
-    /**
-     * Serializes the notification as a single property.
-     *
-     * You should usually just encode the single top-level element of the
-     * notification.
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $node
-     * @return void
-     */
-    public function serialize(DAV\Server $server, \DOMElement $node) {
-
-        switch($this->type) {
-            case self::TYPE_LOW :
-                $type = 'low';
-                break;
-            case self::TYPE_MEDIUM :
-                $type = 'medium';
-                break;
-            default :
-            case self::TYPE_HIGH :
-                $type = 'high';
-                break;
-        }
-
-        $prop = $node->ownerDocument->createElement('cs:systemstatus');
-        $prop->setAttribute('type', $type);
-
-        $node->appendChild($prop);
-
-    }
-
-    /**
-     * This method serializes the entire notification, as it is used in the
-     * response body.
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $node
-     * @return void
-     */
-    public function serializeBody(DAV\Server $server, \DOMElement $node) {
-
-        switch($this->type) {
-            case self::TYPE_LOW :
-                $type = 'low';
-                break;
-            case self::TYPE_MEDIUM :
-                $type = 'medium';
-                break;
-            default :
-            case self::TYPE_HIGH :
-                $type = 'high';
-                break;
-        }
-
-        $prop = $node->ownerDocument->createElement('cs:systemstatus');
-        $prop->setAttribute('type', $type);
-
-        if ($this->description) {
-            $text = $node->ownerDocument->createTextNode($this->description);
-            $desc = $node->ownerDocument->createElement('cs:description');
-            $desc->appendChild($text);
-            $prop->appendChild($desc);
-        }
-        if ($this->href) {
-            $text = $node->ownerDocument->createTextNode($this->href);
-            $href = $node->ownerDocument->createElement('d:href');
-            $href->appendChild($text);
-            $prop->appendChild($href);
-        }
-
-        $node->appendChild($prop);
-
-    }
-
-    /**
-     * Returns a unique id for this notification
-     *
-     * This is just the base url. This should generally be some kind of unique
-     * id.
-     *
-     * @return string
-     */
-    public function getId() {
-
-        return $this->id;
-
-    }
-
-    /*
-     * Returns the ETag for this notification.
-     *
-     * The ETag must be surrounded by literal double-quotes.
-     *
-     * @return string
-     */
-    public function getETag() {
-
-        return $this->etag;
-
-    }
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Plugin.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Plugin.php
deleted file mode 100644
index 610929388..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Plugin.php
+++ /dev/null
@@ -1,1338 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-use Sabre\DAV;
-use Sabre\DAVACL;
-use Sabre\VObject;
-
-/**
- * CalDAV plugin
- *
- * This plugin provides functionality added by CalDAV (RFC 4791)
- * It implements new reports, and the MKCALENDAR method.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class Plugin extends DAV\ServerPlugin {
-
-    /**
-     * This is the official CalDAV namespace
-     */
-    const NS_CALDAV = 'urn:ietf:params:xml:ns:caldav';
-
-    /**
-     * This is the namespace for the proprietary calendarserver extensions
-     */
-    const NS_CALENDARSERVER = 'http://calendarserver.org/ns/';
-
-    /**
-     * The hardcoded root for calendar objects. It is unfortunate
-     * that we're stuck with it, but it will have to do for now
-     */
-    const CALENDAR_ROOT = 'calendars';
-
-    /**
-     * Reference to server object
-     *
-     * @var DAV\Server
-     */
-    protected $server;
-
-    /**
-     * The email handler for invites and other scheduling messages.
-     *
-     * @var Schedule\IMip
-     */
-    protected $imipHandler;
-
-    /**
-     * Sets the iMIP handler.
-     *
-     * iMIP = The email transport of iCalendar scheduling messages. Setting
-     * this is optional, but if you want the server to allow invites to be sent
-     * out, you must set a handler.
-     *
-     * Specifically iCal will plain assume that the server supports this. If
-     * the server doesn't, iCal will display errors when inviting people to
-     * events.
-     *
-     * @param Schedule\IMip $imipHandler
-     * @return void
-     */
-    public function setIMipHandler(Schedule\IMip $imipHandler) {
-
-        $this->imipHandler = $imipHandler;
-
-    }
-
-    /**
-     * Use this method to tell the server this plugin defines additional
-     * HTTP methods.
-     *
-     * This method is passed a uri. It should only return HTTP methods that are
-     * available for the specified uri.
-     *
-     * @param string $uri
-     * @return array
-     */
-    public function getHTTPMethods($uri) {
-
-        // The MKCALENDAR is only available on unmapped uri's, whose
-        // parents extend IExtendedCollection
-        list($parent, $name) = DAV\URLUtil::splitPath($uri);
-
-        $node = $this->server->tree->getNodeForPath($parent);
-
-        if ($node instanceof DAV\IExtendedCollection) {
-            try {
-                $node->getChild($name);
-            } catch (DAV\Exception\NotFound $e) {
-                return array('MKCALENDAR');
-            }
-        }
-        return array();
-
-    }
-
-    /**
-     * Returns a list of features for the DAV: HTTP header.
-     *
-     * @return array
-     */
-    public function getFeatures() {
-
-        return array('calendar-access', 'calendar-proxy');
-
-    }
-
-    /**
-     * Returns a plugin name.
-     *
-     * Using this name other plugins will be able to access other plugins
-     * using DAV\Server::getPlugin
-     *
-     * @return string
-     */
-    public function getPluginName() {
-
-        return 'caldav';
-
-    }
-
-    /**
-     * Returns a list of reports this plugin supports.
-     *
-     * This will be used in the {DAV:}supported-report-set property.
-     * Note that you still need to subscribe to the 'report' event to actually
-     * implement them
-     *
-     * @param string $uri
-     * @return array
-     */
-    public function getSupportedReportSet($uri) {
-
-        $node = $this->server->tree->getNodeForPath($uri);
-
-        $reports = array();
-        if ($node instanceof ICalendar || $node instanceof ICalendarObject) {
-            $reports[] = '{' . self::NS_CALDAV . '}calendar-multiget';
-            $reports[] = '{' . self::NS_CALDAV . '}calendar-query';
-        }
-        if ($node instanceof ICalendar) {
-            $reports[] = '{' . self::NS_CALDAV . '}free-busy-query';
-        }
-        return $reports;
-
-    }
-
-    /**
-     * Initializes the plugin
-     *
-     * @param DAV\Server $server
-     * @return void
-     */
-    public function initialize(DAV\Server $server) {
-
-        $this->server = $server;
-
-        $server->subscribeEvent('unknownMethod',array($this,'unknownMethod'));
-        //$server->subscribeEvent('unknownMethod',array($this,'unknownMethod2'),1000);
-        $server->subscribeEvent('report',array($this,'report'));
-        $server->subscribeEvent('beforeGetProperties',array($this,'beforeGetProperties'));
-        $server->subscribeEvent('onHTMLActionsPanel', array($this,'htmlActionsPanel'));
-        $server->subscribeEvent('onBrowserPostAction', array($this,'browserPostAction'));
-        $server->subscribeEvent('beforeWriteContent', array($this, 'beforeWriteContent'));
-        $server->subscribeEvent('beforeCreateFile', array($this, 'beforeCreateFile'));
-        $server->subscribeEvent('beforeMethod', array($this,'beforeMethod'));
-
-        $server->xmlNamespaces[self::NS_CALDAV] = 'cal';
-        $server->xmlNamespaces[self::NS_CALENDARSERVER] = 'cs';
-
-        $server->propertyMap['{' . self::NS_CALDAV . '}supported-calendar-component-set'] = 'Sabre\\CalDAV\\Property\\SupportedCalendarComponentSet';
-        $server->propertyMap['{' . self::NS_CALDAV . '}schedule-calendar-transp'] = 'Sabre\\CalDAV\\Property\\ScheduleCalendarTransp';
-
-        $server->resourceTypeMapping['\\Sabre\\CalDAV\\ICalendar'] = '{urn:ietf:params:xml:ns:caldav}calendar';
-        $server->resourceTypeMapping['\\Sabre\\CalDAV\\Schedule\\IOutbox'] = '{urn:ietf:params:xml:ns:caldav}schedule-outbox';
-        $server->resourceTypeMapping['\\Sabre\\CalDAV\\Principal\\IProxyRead'] = '{http://calendarserver.org/ns/}calendar-proxy-read';
-        $server->resourceTypeMapping['\\Sabre\\CalDAV\\Principal\\IProxyWrite'] = '{http://calendarserver.org/ns/}calendar-proxy-write';
-        $server->resourceTypeMapping['\\Sabre\\CalDAV\\Notifications\\ICollection'] = '{' . self::NS_CALENDARSERVER . '}notification';
-
-        array_push($server->protectedProperties,
-
-            '{' . self::NS_CALDAV . '}supported-calendar-component-set',
-            '{' . self::NS_CALDAV . '}supported-calendar-data',
-            '{' . self::NS_CALDAV . '}max-resource-size',
-            '{' . self::NS_CALDAV . '}min-date-time',
-            '{' . self::NS_CALDAV . '}max-date-time',
-            '{' . self::NS_CALDAV . '}max-instances',
-            '{' . self::NS_CALDAV . '}max-attendees-per-instance',
-            '{' . self::NS_CALDAV . '}calendar-home-set',
-            '{' . self::NS_CALDAV . '}supported-collation-set',
-            '{' . self::NS_CALDAV . '}calendar-data',
-
-            // scheduling extension
-            '{' . self::NS_CALDAV . '}schedule-inbox-URL',
-            '{' . self::NS_CALDAV . '}schedule-outbox-URL',
-            '{' . self::NS_CALDAV . '}calendar-user-address-set',
-            '{' . self::NS_CALDAV . '}calendar-user-type',
-
-            // CalendarServer extensions
-            '{' . self::NS_CALENDARSERVER . '}getctag',
-            '{' . self::NS_CALENDARSERVER . '}calendar-proxy-read-for',
-            '{' . self::NS_CALENDARSERVER . '}calendar-proxy-write-for',
-            '{' . self::NS_CALENDARSERVER . '}notification-URL',
-            '{' . self::NS_CALENDARSERVER . '}notificationtype'
-
-        );
-    }
-
-    /**
-     * This function handles support for the MKCALENDAR method
-     *
-     * @param string $method
-     * @param string $uri
-     * @return bool
-     */
-    public function unknownMethod($method, $uri) {
-
-        switch ($method) {
-            case 'MKCALENDAR' :
-                $this->httpMkCalendar($uri);
-                // false is returned to stop the propagation of the
-                // unknownMethod event.
-                return false;
-            case 'POST' :
-
-                // Checking if this is a text/calendar content type
-                $contentType = $this->server->httpRequest->getHeader('Content-Type');
-                if (strpos($contentType, 'text/calendar')!==0) {
-                    return;
-                }
-
-                // Checking if we're talking to an outbox
-                try {
-                    $node = $this->server->tree->getNodeForPath($uri);
-                } catch (DAV\Exception\NotFound $e) {
-                    return;
-                }
-                if (!$node instanceof Schedule\IOutbox)
-                    return;
-
-                $this->outboxRequest($node, $uri);
-                return false;
-
-        }
-
-    }
-
-    /**
-     * This functions handles REPORT requests specific to CalDAV
-     *
-     * @param string $reportName
-     * @param \DOMNode $dom
-     * @return bool
-     */
-    public function report($reportName,$dom) {
-
-        switch($reportName) {
-            case '{'.self::NS_CALDAV.'}calendar-multiget' :
-                $this->calendarMultiGetReport($dom);
-                return false;
-            case '{'.self::NS_CALDAV.'}calendar-query' :
-                $this->calendarQueryReport($dom);
-                return false;
-            case '{'.self::NS_CALDAV.'}free-busy-query' :
-                $this->freeBusyQueryReport($dom);
-                return false;
-
-        }
-
-
-    }
-
-    /**
-     * This function handles the MKCALENDAR HTTP method, which creates
-     * a new calendar.
-     *
-     * @param string $uri
-     * @return void
-     */
-    public function httpMkCalendar($uri) {
-
-        // Due to unforgivable bugs in iCal, we're completely disabling MKCALENDAR support
-        // for clients matching iCal in the user agent
-        //$ua = $this->server->httpRequest->getHeader('User-Agent');
-        //if (strpos($ua,'iCal/')!==false) {
-        //    throw new \Sabre\DAV\Exception\Forbidden('iCal has major bugs in it\'s RFC3744 support. Therefore we are left with no other choice but disabling this feature.');
-        //}
-
-        $body = $this->server->httpRequest->getBody(true);
-        $properties = array();
-
-        if ($body) {
-
-            $dom = DAV\XMLUtil::loadDOMDocument($body);
-
-            foreach($dom->firstChild->childNodes as $child) {
-
-                if (DAV\XMLUtil::toClarkNotation($child)!=='{DAV:}set') continue;
-                foreach(DAV\XMLUtil::parseProperties($child,$this->server->propertyMap) as $k=>$prop) {
-                    $properties[$k] = $prop;
-                }
-
-            }
-        }
-
-        $resourceType = array('{DAV:}collection','{urn:ietf:params:xml:ns:caldav}calendar');
-
-        $this->server->createCollection($uri,$resourceType,$properties);
-
-        $this->server->httpResponse->sendStatus(201);
-        $this->server->httpResponse->setHeader('Content-Length',0);
-    }
-
-    /**
-     * beforeGetProperties
-     *
-     * This method handler is invoked before any after properties for a
-     * resource are fetched. This allows us to add in any CalDAV specific
-     * properties.
-     *
-     * @param string $path
-     * @param DAV\INode $node
-     * @param array $requestedProperties
-     * @param array $returnedProperties
-     * @return void
-     */
-    public function beforeGetProperties($path, DAV\INode $node, &$requestedProperties, &$returnedProperties) {
-
-        if ($node instanceof DAVACL\IPrincipal) {
-
-            // calendar-home-set property
-            $calHome = '{' . self::NS_CALDAV . '}calendar-home-set';
-            if (in_array($calHome,$requestedProperties)) {
-                $principalId = $node->getName();
-                $calendarHomePath = self::CALENDAR_ROOT . '/' . $principalId . '/';
-
-                unset($requestedProperties[array_search($calHome, $requestedProperties)]);
-                $returnedProperties[200][$calHome] = new DAV\Property\Href($calendarHomePath);
-
-            }
-
-            // schedule-outbox-URL property
-            $scheduleProp = '{' . self::NS_CALDAV . '}schedule-outbox-URL';
-            if (in_array($scheduleProp,$requestedProperties)) {
-                $principalId = $node->getName();
-                $outboxPath = self::CALENDAR_ROOT . '/' . $principalId . '/outbox';
-
-                unset($requestedProperties[array_search($scheduleProp, $requestedProperties)]);
-                $returnedProperties[200][$scheduleProp] = new DAV\Property\Href($outboxPath);
-
-            }
-
-            // calendar-user-address-set property
-            $calProp = '{' . self::NS_CALDAV . '}calendar-user-address-set';
-            if (in_array($calProp,$requestedProperties)) {
-
-                $addresses = $node->getAlternateUriSet();
-                $addresses[] = $this->server->getBaseUri() . DAV\URLUtil::encodePath($node->getPrincipalUrl() . '/');
-                unset($requestedProperties[array_search($calProp, $requestedProperties)]);
-                $returnedProperties[200][$calProp] = new DAV\Property\HrefList($addresses, false);
-
-            }
-
-            // These two properties are shortcuts for ical to easily find
-            // other principals this principal has access to.
-            $propRead = '{' . self::NS_CALENDARSERVER . '}calendar-proxy-read-for';
-            $propWrite = '{' . self::NS_CALENDARSERVER . '}calendar-proxy-write-for';
-            if (in_array($propRead,$requestedProperties) || in_array($propWrite,$requestedProperties)) {
-
-                $aclPlugin = $this->server->getPlugin('acl');
-                $membership = $aclPlugin->getPrincipalMembership($path);
-                $readList = array();
-                $writeList = array();
-
-                foreach($membership as $group) {
-
-                    $groupNode = $this->server->tree->getNodeForPath($group);
-
-                    // If the node is either ap proxy-read or proxy-write
-                    // group, we grab the parent principal and add it to the
-                    // list.
-                    if ($groupNode instanceof Principal\IProxyRead) {
-                        list($readList[]) = DAV\URLUtil::splitPath($group);
-                    }
-                    if ($groupNode instanceof Principal\IProxyWrite) {
-                        list($writeList[]) = DAV\URLUtil::splitPath($group);
-                    }
-
-                }
-                if (in_array($propRead,$requestedProperties)) {
-                    unset($requestedProperties[$propRead]);
-                    $returnedProperties[200][$propRead] = new DAV\Property\HrefList($readList);
-                }
-                if (in_array($propWrite,$requestedProperties)) {
-                    unset($requestedProperties[$propWrite]);
-                    $returnedProperties[200][$propWrite] = new DAV\Property\HrefList($writeList);
-                }
-
-            }
-
-            // notification-URL property
-            $notificationUrl = '{' . self::NS_CALENDARSERVER . '}notification-URL';
-            if (($index = array_search($notificationUrl, $requestedProperties)) !== false) {
-                $principalId = $node->getName();
-                $calendarHomePath = 'calendars/' . $principalId . '/notifications/';
-                unset($requestedProperties[$index]);
-                $returnedProperties[200][$notificationUrl] = new DAV\Property\Href($calendarHomePath);
-            }
-
-        } // instanceof IPrincipal
-
-        if ($node instanceof Notifications\INode) {
-
-            $propertyName = '{' . self::NS_CALENDARSERVER . '}notificationtype';
-            if (($index = array_search($propertyName, $requestedProperties)) !== false) {
-
-                $returnedProperties[200][$propertyName] =
-                    $node->getNotificationType();
-
-                unset($requestedProperties[$index]);
-
-            }
-
-        } // instanceof Notifications_INode
-
-
-        if ($node instanceof ICalendarObject) {
-            // The calendar-data property is not supposed to be a 'real'
-            // property, but in large chunks of the spec it does act as such.
-            // Therefore we simply expose it as a property.
-            $calDataProp = '{' . Plugin::NS_CALDAV . '}calendar-data';
-            if (in_array($calDataProp, $requestedProperties)) {
-                unset($requestedProperties[$calDataProp]);
-                $val = $node->get();
-                if (is_resource($val))
-                    $val = stream_get_contents($val);
-
-                // Taking out \r to not screw up the xml output
-                $returnedProperties[200][$calDataProp] = str_replace("\r","", $val);
-
-            }
-        }
-
-    }
-
-    /**
-     * This function handles the calendar-multiget REPORT.
-     *
-     * This report is used by the client to fetch the content of a series
-     * of urls. Effectively avoiding a lot of redundant requests.
-     *
-     * @param \DOMNode $dom
-     * @return void
-     */
-    public function calendarMultiGetReport($dom) {
-
-        $properties = array_keys(DAV\XMLUtil::parseProperties($dom->firstChild));
-        $hrefElems = $dom->getElementsByTagNameNS('urn:DAV','href');
-
-        $xpath = new \DOMXPath($dom);
-        $xpath->registerNameSpace('cal',Plugin::NS_CALDAV);
-        $xpath->registerNameSpace('dav','urn:DAV');
-
-        $expand = $xpath->query('/cal:calendar-multiget/dav:prop/cal:calendar-data/cal:expand');
-        if ($expand->length>0) {
-            $expandElem = $expand->item(0);
-            $start = $expandElem->getAttribute('start');
-            $end = $expandElem->getAttribute('end');
-            if(!$start || !$end) {
-                throw new DAV\Exception\BadRequest('The "start" and "end" attributes are required for the CALDAV:expand element');
-            }
-            $start = VObject\DateTimeParser::parseDateTime($start);
-            $end = VObject\DateTimeParser::parseDateTime($end);
-
-            if ($end <= $start) {
-                throw new DAV\Exception\BadRequest('The end-date must be larger than the start-date in the expand element.');
-            }
-
-            $expand = true;
-
-        } else {
-
-            $expand = false;
-
-        }
-
-        foreach($hrefElems as $elem) {
-            $uri = $this->server->calculateUri($elem->nodeValue);
-            list($objProps) = $this->server->getPropertiesForPath($uri,$properties);
-
-            if ($expand && isset($objProps[200]['{' . self::NS_CALDAV . '}calendar-data'])) {
-                $vObject = VObject\Reader::read($objProps[200]['{' . self::NS_CALDAV . '}calendar-data']);
-                $vObject->expand($start, $end);
-                $objProps[200]['{' . self::NS_CALDAV . '}calendar-data'] = $vObject->serialize();
-            }
-
-            $propertyList[]=$objProps;
-
-        }
-
-        $prefer = $this->server->getHTTPPRefer();
-
-        $this->server->httpResponse->sendStatus(207);
-        $this->server->httpResponse->setHeader('Content-Type','application/xml; charset=utf-8');
-        $this->server->httpResponse->setHeader('Vary','Brief,Prefer');
-        $this->server->httpResponse->sendBody($this->server->generateMultiStatus($propertyList, $prefer['return-minimal']));
-
-    }
-
-    /**
-     * This function handles the calendar-query REPORT
-     *
-     * This report is used by clients to request calendar objects based on
-     * complex conditions.
-     *
-     * @param \DOMNode $dom
-     * @return void
-     */
-    public function calendarQueryReport($dom) {
-
-        $parser = new CalendarQueryParser($dom);
-        $parser->parse();
-
-        $node = $this->server->tree->getNodeForPath($this->server->getRequestUri());
-        $depth = $this->server->getHTTPDepth(0);
-
-        // The default result is an empty array
-        $result = array();
-
-        // The calendarobject was requested directly. In this case we handle
-        // this locally.
-        if ($depth == 0 && $node instanceof ICalendarObject) {
-
-            $requestedCalendarData = true;
-            $requestedProperties = $parser->requestedProperties;
-
-            if (!in_array('{urn:ietf:params:xml:ns:caldav}calendar-data', $requestedProperties)) {
-
-                // We always retrieve calendar-data, as we need it for filtering.
-                $requestedProperties[] = '{urn:ietf:params:xml:ns:caldav}calendar-data';
-
-                // If calendar-data wasn't explicitly requested, we need to remove
-                // it after processing.
-                $requestedCalendarData = false;
-            }
-
-            $properties = $this->server->getPropertiesForPath(
-                $this->server->getRequestUri(),
-                $requestedProperties,
-                0
-            );
-
-            // This array should have only 1 element, the first calendar
-            // object.
-            $properties = current($properties);
-
-            // If there wasn't any calendar-data returned somehow, we ignore
-            // this.
-            if (isset($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data'])) {
-
-                $validator = new CalendarQueryValidator();
-
-                $vObject = VObject\Reader::read($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']);
-                if ($validator->validate($vObject,$parser->filters)) {
-
-                    // If the client didn't require the calendar-data property,
-                    // we won't give it back.
-                    if (!$requestedCalendarData) {
-                        unset($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']);
-                    } else {
-                        if ($parser->expand) {
-                            $vObject->expand($parser->expand['start'], $parser->expand['end']);
-                            $properties[200]['{' . self::NS_CALDAV . '}calendar-data'] = $vObject->serialize();
-                        }
-                    }
-
-                    $result = array($properties);
-
-                }
-
-            }
-
-        }
-        // If we're dealing with a calendar, the calendar itself is responsible
-        // for the calendar-query.
-        if ($node instanceof ICalendar && $depth = 1) {
-
-            $nodePaths = $node->calendarQuery($parser->filters);
-
-            foreach($nodePaths as $path) {
-
-                list($properties) =
-                    $this->server->getPropertiesForPath($this->server->getRequestUri() . '/' . $path, $parser->requestedProperties);
-
-                if ($parser->expand) {
-                    // We need to do some post-processing
-                    $vObject = VObject\Reader::read($properties[200]['{urn:ietf:params:xml:ns:caldav}calendar-data']);
-                    $vObject->expand($parser->expand['start'], $parser->expand['end']);
-                    $properties[200]['{' . self::NS_CALDAV . '}calendar-data'] = $vObject->serialize();
-                }
-
-                $result[] = $properties;
-
-            }
-
-        }
-
-        $prefer = $this->server->getHTTPPRefer();
-
-        $this->server->httpResponse->sendStatus(207);
-        $this->server->httpResponse->setHeader('Content-Type','application/xml; charset=utf-8');
-        $this->server->httpResponse->setHeader('Vary','Brief,Prefer');
-        $this->server->httpResponse->sendBody($this->server->generateMultiStatus($result, $prefer['return-minimal']));
-
-    }
-
-    /**
-     * This method is responsible for parsing the request and generating the
-     * response for the CALDAV:free-busy-query REPORT.
-     *
-     * @param \DOMNode $dom
-     * @return void
-     */
-    protected function freeBusyQueryReport(\DOMNode $dom) {
-
-        $start = null;
-        $end = null;
-
-        foreach($dom->firstChild->childNodes as $childNode) {
-
-            $clark = DAV\XMLUtil::toClarkNotation($childNode);
-            if ($clark == '{' . self::NS_CALDAV . '}time-range') {
-                $start = $childNode->getAttribute('start');
-                $end = $childNode->getAttribute('end');
-                break;
-            }
-
-        }
-        if ($start) {
-            $start = VObject\DateTimeParser::parseDateTime($start);
-        }
-        if ($end) {
-            $end = VObject\DateTimeParser::parseDateTime($end);
-        }
-
-        if (!$start && !$end) {
-            throw new DAV\Exception\BadRequest('The freebusy report must have a time-range filter');
-        }
-        $acl = $this->server->getPlugin('acl');
-
-        if (!$acl) {
-            throw new DAV\Exception('The ACL plugin must be loaded for free-busy queries to work');
-        }
-        $uri = $this->server->getRequestUri();
-        $acl->checkPrivileges($uri,'{' . self::NS_CALDAV . '}read-free-busy');
-
-        $calendar = $this->server->tree->getNodeForPath($uri);
-        if (!$calendar instanceof ICalendar) {
-            throw new DAV\Exception\NotImplemented('The free-busy-query REPORT is only implemented on calendars');
-        }
-
-        // Doing a calendar-query first, to make sure we get the most
-        // performance.
-        $urls = $calendar->calendarQuery(array(
-            'name' => 'VCALENDAR',
-            'comp-filters' => array(
-                array(
-                    'name' => 'VEVENT',
-                    'comp-filters' => array(),
-                    'prop-filters' => array(),
-                    'is-not-defined' => false,
-                    'time-range' => array(
-                        'start' => $start,
-                        'end' => $end,
-                    ),
-                ),
-            ),
-            'prop-filters' => array(),
-            'is-not-defined' => false,
-            'time-range' => null,
-        ));
-
-        $objects = array_map(function($url) use ($calendar) {
-            $obj = $calendar->getChild($url)->get();
-            return $obj;
-        }, $urls);
-
-        $generator = new VObject\FreeBusyGenerator();
-        $generator->setObjects($objects);
-        $generator->setTimeRange($start, $end);
-        $result = $generator->getResult();
-        $result = $result->serialize();
-
-        $this->server->httpResponse->sendStatus(200);
-        $this->server->httpResponse->setHeader('Content-Type', 'text/calendar');
-        $this->server->httpResponse->setHeader('Content-Length', strlen($result));
-        $this->server->httpResponse->sendBody($result);
-
-    }
-
-    /**
-     * This method is triggered before a file gets updated with new content.
-     *
-     * This plugin uses this method to ensure that CalDAV objects receive
-     * valid calendar data.
-     *
-     * @param string $path
-     * @param DAV\IFile $node
-     * @param resource $data
-     * @return void
-     */
-    public function beforeWriteContent($path, DAV\IFile $node, &$data) {
-
-        if (!$node instanceof ICalendarObject)
-            return;
-
-        $this->validateICalendar($data, $path);
-
-    }
-
-    /**
-     * This method is triggered before a new file is created.
-     *
-     * This plugin uses this method to ensure that newly created calendar
-     * objects contain valid calendar data.
-     *
-     * @param string $path
-     * @param resource $data
-     * @param DAV\ICollection $parentNode
-     * @return void
-     */
-    public function beforeCreateFile($path, &$data, DAV\ICollection $parentNode) {
-
-        if (!$parentNode instanceof Calendar)
-            return;
-
-        $this->validateICalendar($data, $path);
-
-    }
-
-    /**
-     * This event is triggered before any HTTP request is handled.
-     *
-     * We use this to intercept GET calls to notification nodes, and return the
-     * proper response.
-     *
-     * @param string $method
-     * @param string $path
-     * @return void
-     */
-    public function beforeMethod($method, $path) {
-
-        if ($method!=='GET') return;
-
-        try {
-            $node = $this->server->tree->getNodeForPath($path);
-        } catch (DAV\Exception\NotFound $e) {
-            return;
-        }
-
-        if (!$node instanceof Notifications\INode)
-            return;
-
-        if (!$this->server->checkPreconditions(true)) return false;
-        $dom = new \DOMDocument('1.0', 'UTF-8');
-
-        $dom->formatOutput = true;
-
-        $root = $dom->createElement('cs:notification');
-        foreach($this->server->xmlNamespaces as $namespace => $prefix) {
-            $root->setAttribute('xmlns:' . $prefix, $namespace);
-        }
-
-        $dom->appendChild($root);
-        $node->getNotificationType()->serializeBody($this->server, $root);
-
-        $this->server->httpResponse->setHeader('Content-Type','application/xml');
-        $this->server->httpResponse->setHeader('ETag',$node->getETag());
-        $this->server->httpResponse->sendStatus(200);
-        $this->server->httpResponse->sendBody($dom->saveXML());
-
-        return false;
-
-    }
-
-    /**
-     * Checks if the submitted iCalendar data is in fact, valid.
-     *
-     * An exception is thrown if it's not.
-     *
-     * @param resource|string $data
-     * @param string $path
-     * @return void
-     */
-    protected function validateICalendar(&$data, $path) {
-
-        // If it's a stream, we convert it to a string first.
-        if (is_resource($data)) {
-            $data = stream_get_contents($data);
-        }
-
-        // Converting the data to unicode, if needed.
-        $data = DAV\StringUtil::ensureUTF8($data);
-
-        try {
-
-            $vobj = VObject\Reader::read($data);
-
-        } catch (VObject\ParseException $e) {
-
-            throw new DAV\Exception\UnsupportedMediaType('This resource only supports valid iCalendar 2.0 data. Parse error: ' . $e->getMessage());
-
-        }
-
-        if ($vobj->name !== 'VCALENDAR') {
-            throw new DAV\Exception\UnsupportedMediaType('This collection can only support iCalendar objects.');
-        }
-
-        // Get the Supported Components for the target calendar
-        list($parentPath,$object) = DAV\URLUtil::splitPath($path);
-        $calendarProperties = $this->server->getProperties($parentPath,array('{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set'));
-        $supportedComponents = $calendarProperties['{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set']->getValue();
-
-        $foundType = null;
-        $foundUID = null;
-        foreach($vobj->getComponents() as $component) {
-            switch($component->name) {
-                case 'VTIMEZONE' :
-                    continue 2;
-                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');
-                        }
-                    }
-                    break;
-                default :
-                    throw new DAV\Exception\BadRequest('You are not allowed to create components of type: ' . $component->name . ' here');
-
-            }
-        }
-        if (!$foundType)
-            throw new DAV\Exception\BadRequest('iCalendar object must contain at least 1 of VEVENT, VTODO or VJOURNAL');
-
-    }
-
-    /**
-     * This method handles POST requests to the schedule-outbox.
-     *
-     * Currently, two types of requests are support:
-     *   * FREEBUSY requests from RFC 6638
-     *   * Simple iTIP messages from draft-desruisseaux-caldav-sched-04
-     *
-     * The latter is from an expired early draft of the CalDAV scheduling
-     * extensions, but iCal depends on a feature from that spec, so we
-     * implement it.
-     *
-     * @param Schedule\IOutbox $outboxNode
-     * @param string $outboxUri
-     * @return void
-     */
-    public function outboxRequest(Schedule\IOutbox $outboxNode, $outboxUri) {
-
-        // Parsing the request body
-        try {
-            $vObject = VObject\Reader::read($this->server->httpRequest->getBody(true));
-        } catch (VObject\ParseException $e) {
-            throw new DAV\Exception\BadRequest('The request body must be a valid iCalendar object. Parse error: ' . $e->getMessage());
-        }
-
-        // The incoming iCalendar object must have a METHOD property, and a
-        // component. The combination of both determines what type of request
-        // this is.
-        $componentType = null;
-        foreach($vObject->getComponents() as $component) {
-            if ($component->name !== 'VTIMEZONE') {
-                $componentType = $component->name;
-                break;
-            }
-        }
-        if (is_null($componentType)) {
-            throw new DAV\Exception\BadRequest('We expected at least one VTODO, VJOURNAL, VFREEBUSY or VEVENT component');
-        }
-
-        // Validating the METHOD
-        $method = strtoupper((string)$vObject->METHOD);
-        if (!$method) {
-            throw new DAV\Exception\BadRequest('A METHOD property must be specified in iTIP messages');
-        }
-
-        // So we support two types of requests:
-        //
-        // REQUEST with a VFREEBUSY component
-        // REQUEST, REPLY, ADD, CANCEL on VEVENT components
-
-        $acl = $this->server->getPlugin('acl');
-
-        if ($componentType === 'VFREEBUSY' && $method === 'REQUEST') {
-
-            $acl && $acl->checkPrivileges($outboxUri,'{' . Plugin::NS_CALDAV . '}schedule-query-freebusy');
-            $this->handleFreeBusyRequest($outboxNode, $vObject);
-
-        } elseif ($componentType === 'VEVENT' && in_array($method, array('REQUEST','REPLY','ADD','CANCEL'))) {
-
-            $acl && $acl->checkPrivileges($outboxUri,'{' . Plugin::NS_CALDAV . '}schedule-post-vevent');
-            $this->handleEventNotification($outboxNode, $vObject);
-
-        } else {
-
-            throw new DAV\Exception\NotImplemented('SabreDAV supports only VFREEBUSY (REQUEST) and VEVENT (REQUEST, REPLY, ADD, CANCEL)');
-
-        }
-
-    }
-
-    /**
-     * This method handles the REQUEST, REPLY, ADD and CANCEL methods for
-     * VEVENT iTip messages.
-     *
-     * @return void
-     */
-    protected function handleEventNotification(Schedule\IOutbox $outboxNode, VObject\Component $vObject) {
-
-        $originator = $this->server->httpRequest->getHeader('Originator');
-        $recipients = $this->server->httpRequest->getHeader('Recipient');
-
-        if (!$originator) {
-            throw new DAV\Exception\BadRequest('The Originator: header must be specified when making POST requests');
-        }
-        if (!$recipients) {
-            throw new DAV\Exception\BadRequest('The Recipient: header must be specified when making POST requests');
-        }
-
-        $recipients = explode(',',$recipients);
-        foreach($recipients as $k=>$recipient) {
-
-            $recipient = trim($recipient);
-            if (!preg_match('/^mailto:(.*)@(.*)$/i', $recipient)) {
-                throw new DAV\Exception\BadRequest('Recipients must start with mailto: and must be valid email address');
-            }
-            $recipient = substr($recipient, 7);
-            $recipients[$k] = $recipient;
-        }
-
-        // We need to make sure that 'originator' matches one of the email
-        // addresses of the selected principal.
-        $principal = $outboxNode->getOwner();
-        $props = $this->server->getProperties($principal,array(
-            '{' . self::NS_CALDAV . '}calendar-user-address-set',
-        ));
-
-        $addresses = array();
-        if (isset($props['{' . self::NS_CALDAV . '}calendar-user-address-set'])) {
-            $addresses = $props['{' . self::NS_CALDAV . '}calendar-user-address-set']->getHrefs();
-        }
-
-        $found = false;
-        foreach($addresses as $address) {
-
-            // Trimming the / on both sides, just in case..
-            if (rtrim(strtolower($originator),'/') === rtrim(strtolower($address),'/')) {
-                $found = true;
-                break;
-            }
-
-        }
-
-        if (!$found) {
-            throw new DAV\Exception\Forbidden('The addresses specified in the Originator header did not match any addresses in the owners calendar-user-address-set header');
-        }
-
-        // If the Originator header was a url, and not a mailto: address..
-        // we're going to try to pull the mailto: from the vobject body.
-        if (strtolower(substr($originator,0,7)) !== 'mailto:') {
-            $originator = (string)$vObject->VEVENT->ORGANIZER;
-
-        }
-        if (strtolower(substr($originator,0,7)) !== 'mailto:') {
-            throw new DAV\Exception\Forbidden('Could not find mailto: address in both the Orignator header, and the ORGANIZER property in the VEVENT');
-        }
-        $originator = substr($originator,7);
-
-        $result = $this->iMIPMessage($originator, $recipients, $vObject, $principal);
-        $this->server->httpResponse->sendStatus(200);
-        $this->server->httpResponse->setHeader('Content-Type','application/xml');
-        $this->server->httpResponse->sendBody($this->generateScheduleResponse($result));
-
-    }
-
-    /**
-     * Sends an iMIP message by email.
-     *
-     * This method must return an array with status codes per recipient.
-     * This should look something like:
-     *
-     * array(
-     *    'user1@example.org' => '2.0;Success'
-     * )
-     *
-     * Formatting for this status code can be found at:
-     * https://tools.ietf.org/html/rfc5545#section-3.8.8.3
-     *
-     * A list of valid status codes can be found at:
-     * https://tools.ietf.org/html/rfc5546#section-3.6
-     *
-     * @param string $originator
-     * @param array $recipients
-     * @param VObject\Component $vObject
-     * @param string $principal Principal url
-     * @return array 
-     */
-    protected function iMIPMessage($originator, array $recipients, VObject\Component $vObject, $principal) {
-
-        if (!$this->imipHandler) {
-            $resultStatus = '5.2;This server does not support this operation';
-        } else {
-            $this->imipHandler->sendMessage($originator, $recipients, $vObject, $principal);
-            $resultStatus = '2.0;Success';
-        }
-
-        $result = array();
-        foreach($recipients as $recipient) {
-            $result[$recipient] = $resultStatus;
-        }
-
-        return $result;
-
-    }
-
-    /**
-     * Generates a schedule-response XML body
-     *
-     * The recipients array is a key->value list, containing email addresses
-     * and iTip status codes. See the iMIPMessage method for a description of
-     * the value.
-     *
-     * @param array $recipients
-     * @return string
-     */
-    public function generateScheduleResponse(array $recipients) {
-
-        $dom = new \DOMDocument('1.0','utf-8');
-        $dom->formatOutput = true;
-        $xscheduleResponse = $dom->createElement('cal:schedule-response');
-        $dom->appendChild($xscheduleResponse);
-
-        foreach($this->server->xmlNamespaces as $namespace=>$prefix) {
-
-            $xscheduleResponse->setAttribute('xmlns:' . $prefix, $namespace);
-
-        }
-
-        foreach($recipients as $recipient=>$status) {
-            $xresponse = $dom->createElement('cal:response');
-
-            $xrecipient = $dom->createElement('cal:recipient');
-            $xrecipient->appendChild($dom->createTextNode($recipient));
-            $xresponse->appendChild($xrecipient);
-
-            $xrequestStatus = $dom->createElement('cal:request-status');
-            $xrequestStatus->appendChild($dom->createTextNode($status));
-            $xresponse->appendChild($xrequestStatus);
-
-            $xscheduleResponse->appendChild($xresponse);
-
-        }
-
-        return $dom->saveXML();
-
-    }
-
-    /**
-     * This method is responsible for parsing a free-busy query request and
-     * returning it's result.
-     *
-     * @param Schedule\IOutbox $outbox
-     * @param string $request
-     * @return string
-     */
-    protected function handleFreeBusyRequest(Schedule\IOutbox $outbox, VObject\Component $vObject) {
-
-        $vFreeBusy = $vObject->VFREEBUSY;
-        $organizer = $vFreeBusy->organizer;
-
-        $organizer = (string)$organizer;
-
-        // Validating if the organizer matches the owner of the inbox.
-        $owner = $outbox->getOwner();
-
-        $caldavNS = '{' . Plugin::NS_CALDAV . '}';
-
-        $uas = $caldavNS . 'calendar-user-address-set';
-        $props = $this->server->getProperties($owner,array($uas));
-
-        if (empty($props[$uas]) || !in_array($organizer, $props[$uas]->getHrefs())) {
-            throw new DAV\Exception\Forbidden('The organizer in the request did not match any of the addresses for the owner of this inbox');
-        }
-
-        if (!isset($vFreeBusy->ATTENDEE)) {
-            throw new DAV\Exception\BadRequest('You must at least specify 1 attendee');
-        }
-
-        $attendees = array();
-        foreach($vFreeBusy->ATTENDEE as $attendee) {
-            $attendees[]= (string)$attendee;
-        }
-
-
-        if (!isset($vFreeBusy->DTSTART) || !isset($vFreeBusy->DTEND)) {
-            throw new DAV\Exception\BadRequest('DTSTART and DTEND must both be specified');
-        }
-
-        $startRange = $vFreeBusy->DTSTART->getDateTime();
-        $endRange = $vFreeBusy->DTEND->getDateTime();
-
-        $results = array();
-        foreach($attendees as $attendee) {
-            $results[] = $this->getFreeBusyForEmail($attendee, $startRange, $endRange, $vObject);
-        }
-
-        $dom = new \DOMDocument('1.0','utf-8');
-        $dom->formatOutput = true;
-        $scheduleResponse = $dom->createElement('cal:schedule-response');
-        foreach($this->server->xmlNamespaces as $namespace=>$prefix) {
-
-            $scheduleResponse->setAttribute('xmlns:' . $prefix,$namespace);
-
-        }
-        $dom->appendChild($scheduleResponse);
-
-        foreach($results as $result) {
-            $response = $dom->createElement('cal:response');
-
-            $recipient = $dom->createElement('cal:recipient');
-            $recipientHref = $dom->createElement('d:href');
-
-            $recipientHref->appendChild($dom->createTextNode($result['href']));
-            $recipient->appendChild($recipientHref);
-            $response->appendChild($recipient);
-
-            $reqStatus = $dom->createElement('cal:request-status');
-            $reqStatus->appendChild($dom->createTextNode($result['request-status']));
-            $response->appendChild($reqStatus);
-
-            if (isset($result['calendar-data'])) {
-
-                $calendardata = $dom->createElement('cal:calendar-data');
-                $calendardata->appendChild($dom->createTextNode(str_replace("\r\n","\n",$result['calendar-data']->serialize())));
-                $response->appendChild($calendardata);
-
-            }
-            $scheduleResponse->appendChild($response);
-        }
-
-        $this->server->httpResponse->sendStatus(200);
-        $this->server->httpResponse->setHeader('Content-Type','application/xml');
-        $this->server->httpResponse->sendBody($dom->saveXML());
-
-    }
-
-    /**
-     * Returns free-busy information for a specific address. The returned
-     * data is an array containing the following properties:
-     *
-     * calendar-data : A VFREEBUSY VObject
-     * request-status : an iTip status code.
-     * href: The principal's email address, as requested
-     *
-     * The following request status codes may be returned:
-     *   * 2.0;description
-     *   * 3.7;description
-     *
-     * @param string $email address
-     * @param \DateTime $start
-     * @param \DateTime $end
-     * @param VObject\Component $request
-     * @return array
-     */
-    protected function getFreeBusyForEmail($email, \DateTime $start, \DateTime $end, VObject\Component $request) {
-
-        $caldavNS = '{' . Plugin::NS_CALDAV . '}';
-
-        $aclPlugin = $this->server->getPlugin('acl');
-        if (substr($email,0,7)==='mailto:') $email = substr($email,7);
-
-        $result = $aclPlugin->principalSearch(
-            array('{http://sabredav.org/ns}email-address' => $email),
-            array(
-                '{DAV:}principal-URL', $caldavNS . 'calendar-home-set',
-                '{http://sabredav.org/ns}email-address',
-            )
-        );
-
-        if (!count($result)) {
-            return array(
-                'request-status' => '3.7;Could not find principal',
-                'href' => 'mailto:' . $email,
-            );
-        }
-
-        if (!isset($result[0][200][$caldavNS . 'calendar-home-set'])) {
-            return array(
-                'request-status' => '3.7;No calendar-home-set property found',
-                'href' => 'mailto:' . $email,
-            );
-        }
-        $homeSet = $result[0][200][$caldavNS . 'calendar-home-set']->getHref();
-
-        // Grabbing the calendar list
-        $objects = array();
-        foreach($this->server->tree->getNodeForPath($homeSet)->getChildren() as $node) {
-            if (!$node instanceof ICalendar) {
-                continue;
-            }
-            $aclPlugin->checkPrivileges($homeSet . $node->getName() ,$caldavNS . 'read-free-busy');
-
-            // Getting the list of object uris within the time-range
-            $urls = $node->calendarQuery(array(
-                'name' => 'VCALENDAR',
-                'comp-filters' => array(
-                    array(
-                        'name' => 'VEVENT',
-                        'comp-filters' => array(),
-                        'prop-filters' => array(),
-                        'is-not-defined' => false,
-                        'time-range' => array(
-                            'start' => $start,
-                            'end' => $end,
-                        ),
-                    ),
-                ),
-                'prop-filters' => array(),
-                'is-not-defined' => false,
-                'time-range' => null,
-            ));
-
-            $calObjects = array_map(function($url) use ($node) {
-                $obj = $node->getChild($url)->get();
-                return $obj;
-            }, $urls);
-
-            $objects = array_merge($objects,$calObjects);
-
-        }
-
-        $vcalendar = new VObject\Component\VCalendar();
-        $vcalendar->VERSION = '2.0';
-        $vcalendar->METHOD = 'REPLY';
-        $vcalendar->CALSCALE = 'GREGORIAN';
-        $vcalendar->PRODID = '-//SabreDAV//SabreDAV ' . DAV\Version::VERSION . '//EN';
-
-        $generator = new VObject\FreeBusyGenerator();
-        $generator->setObjects($objects);
-        $generator->setTimeRange($start, $end);
-        $generator->setBaseObject($vcalendar);
-
-        $result = $generator->getResult();
-
-        $vcalendar->VFREEBUSY->ATTENDEE = 'mailto:' . $email;
-        $vcalendar->VFREEBUSY->UID = (string)$request->VFREEBUSY->UID;
-        $vcalendar->VFREEBUSY->ORGANIZER = clone $request->VFREEBUSY->ORGANIZER;
-
-        return array(
-            'calendar-data' => $result,
-            'request-status' => '2.0;Success',
-            'href' => 'mailto:' . $email,
-        );
-    }
-
-    /**
-     * This method is used to generate HTML output for the
-     * DAV\Browser\Plugin. This allows us to generate an interface users
-     * can use to create new calendars.
-     *
-     * @param DAV\INode $node
-     * @param string $output
-     * @return bool
-     */
-    public function htmlActionsPanel(DAV\INode $node, &$output) {
-
-        if (!$node instanceof UserCalendars)
-            return;
-
-        $output.= '<tr><td colspan="2"><form method="post" action="">
-            <h3>Create new calendar</h3>
-            <input type="hidden" name="sabreAction" value="mkcalendar" />
-            <label>Name (uri):</label> <input type="text" name="name" /><br />
-            <label>Display name:</label> <input type="text" name="{DAV:}displayname" /><br />
-            <input type="submit" value="create" />
-            </form>
-            </td></tr>';
-
-        return false;
-
-    }
-
-    /**
-     * This method allows us to intercept the 'mkcalendar' sabreAction. This
-     * action enables the user to create new calendars from the browser plugin.
-     *
-     * @param string $uri
-     * @param string $action
-     * @param array $postVars
-     * @return bool
-     */
-    public function browserPostAction($uri, $action, array $postVars) {
-
-        if ($action!=='mkcalendar')
-            return;
-
-        $resourceType = array('{DAV:}collection','{urn:ietf:params:xml:ns:caldav}calendar');
-        $properties = array();
-        if (isset($postVars['{DAV:}displayname'])) {
-            $properties['{DAV:}displayname'] = $postVars['{DAV:}displayname'];
-        }
-        $this->server->createCollection($uri . '/' . $postVars['name'],$resourceType,$properties);
-        return false;
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/Collection.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/Collection.php
deleted file mode 100644
index 8a747a644..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/Collection.php
+++ /dev/null
@@ -1,32 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Principal;
-use Sabre\DAVACL;
-
-/**
- * Principal collection
- *
- * This is an alternative collection to the standard ACL principal collection.
- * This collection adds support for the calendar-proxy-read and
- * calendar-proxy-write sub-principals, as defined by the caldav-proxy
- * specification.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class Collection extends DAVACL\AbstractPrincipalCollection {
-
-    /**
-     * Returns a child object based on principal information
-     *
-     * @param array $principalInfo
-     * @return User
-     */
-    public function getChildForPrincipal(array $principalInfo) {
-
-        return new User($this->principalBackend, $principalInfo);
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/IProxyRead.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/IProxyRead.php
deleted file mode 100644
index 548411fa8..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/IProxyRead.php
+++ /dev/null
@@ -1,19 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Principal;
-
-use Sabre\DAVACL;
-
-/**
- * ProxyRead principal interface
- *
- * Any principal node implementing this interface will be picked up as a 'proxy
- * principal group'.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-interface IProxyRead extends DAVACL\IPrincipal {
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/IProxyWrite.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/IProxyWrite.php
deleted file mode 100644
index f0e6e47cb..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/IProxyWrite.php
+++ /dev/null
@@ -1,19 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Principal;
-
-use Sabre\DAVACL;
-
-/**
- * ProxyWrite principal interface
- *
- * Any principal node implementing this interface will be picked up as a 'proxy
- * principal group'.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-interface IProxyWrite extends DAVACL\IPrincipal {
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/ProxyRead.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/ProxyRead.php
deleted file mode 100644
index 62f66b98c..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/ProxyRead.php
+++ /dev/null
@@ -1,180 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Principal;
-use Sabre\DAVACL;
-use Sabre\DAV;
-
-/**
- * ProxyRead principal
- *
- * This class represents a principal group, hosted under the main principal.
- * This is needed to implement 'Calendar delegation' support. This class is
- * instantiated by User.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class ProxyRead implements IProxyRead {
-
-    /**
-     * Principal information from the parent principal.
-     *
-     * @var array
-     */
-    protected $principalInfo;
-
-    /**
-     * Principal backend
-     *
-     * @var DAVACL\PrincipalBackend\BackendInterface
-     */
-    protected $principalBackend;
-
-    /**
-     * Creates the object.
-     *
-     * Note that you MUST supply the parent principal information.
-     *
-     * @param DAVACL\PrincipalBackend\BackendInterface $principalBackend
-     * @param array $principalInfo
-     */
-    public function __construct(DAVACL\PrincipalBackend\BackendInterface $principalBackend, array $principalInfo) {
-
-        $this->principalInfo = $principalInfo;
-        $this->principalBackend = $principalBackend;
-
-    }
-
-    /**
-     * Returns this principals name.
-     *
-     * @return string
-     */
-    public function getName() {
-
-        return 'calendar-proxy-read';
-
-    }
-
-    /**
-     * Returns the last modification time
-     *
-     * @return null
-     */
-    public function getLastModified() {
-
-        return null;
-
-    }
-
-    /**
-     * Deletes the current node
-     *
-     * @throws DAV\Exception\Forbidden
-     * @return void
-     */
-    public function delete() {
-
-        throw new DAV\Exception\Forbidden('Permission denied to delete node');
-
-    }
-
-    /**
-     * Renames the node
-     *
-     * @throws DAV\Exception\Forbidden
-     * @param string $name The new name
-     * @return void
-     */
-    public function setName($name) {
-
-        throw new DAV\Exception\Forbidden('Permission denied to rename file');
-
-    }
-
-
-    /**
-     * Returns a list of alternative urls for a principal
-     *
-     * This can for example be an email address, or ldap url.
-     *
-     * @return array
-     */
-    public function getAlternateUriSet() {
-
-        return array();
-
-    }
-
-    /**
-     * Returns the full principal url
-     *
-     * @return string
-     */
-    public function getPrincipalUrl() {
-
-        return $this->principalInfo['uri'] . '/' . $this->getName();
-
-    }
-
-    /**
-     * Returns the list of group members
-     *
-     * If this principal is a group, this function should return
-     * all member principal uri's for the group.
-     *
-     * @return array
-     */
-    public function getGroupMemberSet() {
-
-        return $this->principalBackend->getGroupMemberSet($this->getPrincipalUrl());
-
-    }
-
-    /**
-     * Returns the list of groups this principal is member of
-     *
-     * If this principal is a member of a (list of) groups, this function
-     * should return a list of principal uri's for it's members.
-     *
-     * @return array
-     */
-    public function getGroupMembership() {
-
-        return $this->principalBackend->getGroupMembership($this->getPrincipalUrl());
-
-    }
-
-    /**
-     * Sets a list of group members
-     *
-     * If this principal is a group, this method sets all the group members.
-     * The list of members is always overwritten, never appended to.
-     *
-     * This method should throw an exception if the members could not be set.
-     *
-     * @param array $principals
-     * @return void
-     */
-    public function setGroupMemberSet(array $principals) {
-
-        $this->principalBackend->setGroupMemberSet($this->getPrincipalUrl(), $principals);
-
-    }
-
-    /**
-     * Returns the displayname
-     *
-     * This should be a human readable name for the principal.
-     * If none is available, return the nodename.
-     *
-     * @return string
-     */
-    public function getDisplayName() {
-
-        return $this->getName();
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/ProxyWrite.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/ProxyWrite.php
deleted file mode 100644
index 02cd81f70..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/ProxyWrite.php
+++ /dev/null
@@ -1,180 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Principal;
-use Sabre\DAVACL;
-use Sabre\DAV;
-
-/**
- * ProxyWrite principal
- *
- * This class represents a principal group, hosted under the main principal.
- * This is needed to implement 'Calendar delegation' support. This class is
- * instantiated by User.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class ProxyWrite implements IProxyWrite {
-
-    /**
-     * Parent principal information
-     *
-     * @var array
-     */
-    protected $principalInfo;
-
-    /**
-     * Principal Backend
-     *
-     * @var DAVACL\PrincipalBackend\BackendInterface
-     */
-    protected $principalBackend;
-
-    /**
-     * Creates the object
-     *
-     * Note that you MUST supply the parent principal information.
-     *
-     * @param DAVACL\PrincipalBackend\BackendInterface $principalBackend
-     * @param array $principalInfo
-     */
-    public function __construct(DAVACL\PrincipalBackend\BackendInterface $principalBackend, array $principalInfo) {
-
-        $this->principalInfo = $principalInfo;
-        $this->principalBackend = $principalBackend;
-
-    }
-
-    /**
-     * Returns this principals name.
-     *
-     * @return string
-     */
-    public function getName() {
-
-        return 'calendar-proxy-write';
-
-    }
-
-    /**
-     * Returns the last modification time
-     *
-     * @return null
-     */
-    public function getLastModified() {
-
-        return null;
-
-    }
-
-    /**
-     * Deletes the current node
-     *
-     * @throws DAV\Exception\Forbidden
-     * @return void
-     */
-    public function delete() {
-
-        throw new DAV\Exception\Forbidden('Permission denied to delete node');
-
-    }
-
-    /**
-     * Renames the node
-     *
-     * @throws DAV\Exception\Forbidden
-     * @param string $name The new name
-     * @return void
-     */
-    public function setName($name) {
-
-        throw new DAV\Exception\Forbidden('Permission denied to rename file');
-
-    }
-
-
-    /**
-     * Returns a list of alternative urls for a principal
-     *
-     * This can for example be an email address, or ldap url.
-     *
-     * @return array
-     */
-    public function getAlternateUriSet() {
-
-        return array();
-
-    }
-
-    /**
-     * Returns the full principal url
-     *
-     * @return string
-     */
-    public function getPrincipalUrl() {
-
-        return $this->principalInfo['uri'] . '/' . $this->getName();
-
-    }
-
-    /**
-     * Returns the list of group members
-     *
-     * If this principal is a group, this function should return
-     * all member principal uri's for the group.
-     *
-     * @return array
-     */
-    public function getGroupMemberSet() {
-
-        return $this->principalBackend->getGroupMemberSet($this->getPrincipalUrl());
-
-    }
-
-    /**
-     * Returns the list of groups this principal is member of
-     *
-     * If this principal is a member of a (list of) groups, this function
-     * should return a list of principal uri's for it's members.
-     *
-     * @return array
-     */
-    public function getGroupMembership() {
-
-        return $this->principalBackend->getGroupMembership($this->getPrincipalUrl());
-
-    }
-
-    /**
-     * Sets a list of group members
-     *
-     * If this principal is a group, this method sets all the group members.
-     * The list of members is always overwritten, never appended to.
-     *
-     * This method should throw an exception if the members could not be set.
-     *
-     * @param array $principals
-     * @return void
-     */
-    public function setGroupMemberSet(array $principals) {
-
-        $this->principalBackend->setGroupMemberSet($this->getPrincipalUrl(), $principals);
-
-    }
-
-    /**
-     * Returns the displayname
-     *
-     * This should be a human readable name for the principal.
-     * If none is available, return the nodename.
-     *
-     * @return string
-     */
-    public function getDisplayName() {
-
-        return $this->getName();
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/User.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/User.php
deleted file mode 100644
index 6f3ccb868..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Principal/User.php
+++ /dev/null
@@ -1,134 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Principal;
-use Sabre\DAV;
-use Sabre\DAVACL;
-
-/**
- * CalDAV principal
- *
- * This is a standard user-principal for CalDAV. This principal is also a
- * collection and returns the caldav-proxy-read and caldav-proxy-write child
- * principals.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class User extends DAVACL\Principal implements DAV\ICollection {
-
-    /**
-     * Creates a new file in the directory
-     *
-     * @param string $name Name of the file
-     * @param resource $data Initial payload, passed as a readable stream resource.
-     * @throws DAV\Exception\Forbidden
-     * @return void
-     */
-    public function createFile($name, $data = null) {
-
-        throw new DAV\Exception\Forbidden('Permission denied to create file (filename ' . $name . ')');
-
-    }
-
-    /**
-     * Creates a new subdirectory
-     *
-     * @param string $name
-     * @throws DAV\Exception\Forbidden
-     * @return void
-     */
-    public function createDirectory($name) {
-
-        throw new DAV\Exception\Forbidden('Permission denied to create directory');
-
-    }
-
-    /**
-     * Returns a specific child node, referenced by its name
-     *
-     * @param string $name
-     * @return DAV\INode
-     */
-    public function getChild($name) {
-
-        $principal = $this->principalBackend->getPrincipalByPath($this->getPrincipalURL() . '/' . $name);
-        if (!$principal) {
-            throw new DAV\Exception\NotFound('Node with name ' . $name . ' was not found');
-        }
-        if ($name === 'calendar-proxy-read')
-            return new ProxyRead($this->principalBackend, $this->principalProperties);
-
-        if ($name === 'calendar-proxy-write')
-            return new ProxyWrite($this->principalBackend, $this->principalProperties);
-
-        throw new DAV\Exception\NotFound('Node with name ' . $name . ' was not found');
-
-    }
-
-    /**
-     * Returns an array with all the child nodes
-     *
-    * @return DAV\INode[]
-     */
-    public function getChildren() {
-
-        $r = array();
-        if ($this->principalBackend->getPrincipalByPath($this->getPrincipalURL() . '/calendar-proxy-read')) {
-            $r[] = new ProxyRead($this->principalBackend, $this->principalProperties);
-        }
-        if ($this->principalBackend->getPrincipalByPath($this->getPrincipalURL() . '/calendar-proxy-write')) {
-            $r[] = new ProxyWrite($this->principalBackend, $this->principalProperties);
-        }
-
-        return $r;
-
-    }
-
-    /**
-     * Returns whether or not the child node exists
-     *
-     * @param string $name
-     * @return bool
-     */
-    public function childExists($name) {
-
-        try {
-            $this->getChild($name);
-            return true;
-        } catch (DAV\Exception\NotFound $e) {
-            return false;
-        }
-
-    }
-
-    /**
-     * 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
-     */
-    public function getACL() {
-
-        $acl = parent::getACL();
-        $acl[] = array(
-            'privilege' => '{DAV:}read',
-            'principal' => $this->principalProperties['uri'] . '/calendar-proxy-read',
-            'protected' => true,
-        );
-        $acl[] = array(
-            'privilege' => '{DAV:}read',
-            'principal' => $this->principalProperties['uri'] . '/calendar-proxy-write',
-            'protected' => true,
-        );
-        return $acl;
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Property/AllowedSharingModes.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Property/AllowedSharingModes.php
deleted file mode 100644
index ca8312d40..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Property/AllowedSharingModes.php
+++ /dev/null
@@ -1,74 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Property;
-
-use Sabre\DAV;
-
-/**
- * AllowedSharingModes
- *
- * This property encodes the 'allowed-sharing-modes' property, as defined by
- * the 'caldav-sharing-02' spec, in the http://calendarserver.org/ns/
- * namespace.
- *
- * This property is a representation of the supported-calendar_component-set
- * property in the CalDAV namespace. It simply requires an array of components,
- * such as VEVENT, VTODO
- *
- * @see https://trac.calendarserver.org/browser/CalendarServer/trunk/doc/Extensions/caldav-sharing-02.txt
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class AllowedSharingModes extends DAV\Property {
-
-    /**
-     * Whether or not a calendar can be shared with another user
-     *
-     * @var bool
-     */
-    protected $canBeShared;
-
-    /**
-     * Whether or not the calendar can be placed on a public url.
-     *
-     * @var bool
-     */
-    protected $canBePublished;
-
-    /**
-     * Constructor
-     *
-     * @param bool $canBeShared
-     * @param bool $canBePublished
-     * @return void
-     */
-    public function __construct($canBeShared, $canBePublished) {
-
-        $this->canBeShared = $canBeShared;
-        $this->canBePublished = $canBePublished;
-
-    }
-
-    /**
-     * Serializes the property in a DOMDocument
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $node
-     * @return void
-     */
-    public function serialize(DAV\Server $server, \DOMElement $node) {
-
-       $doc = $node->ownerDocument;
-       if ($this->canBeShared) {
-            $xcomp = $doc->createElement('cs:can-be-shared');
-            $node->appendChild($xcomp);
-       }
-       if ($this->canBePublished) {
-            $xcomp = $doc->createElement('cs:can-be-published');
-            $node->appendChild($xcomp);
-       }
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Property/Invite.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Property/Invite.php
deleted file mode 100644
index 86ef69e80..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Property/Invite.php
+++ /dev/null
@@ -1,227 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Property;
-
-use Sabre\CalDAV\SharingPlugin as SharingPlugin;
-use Sabre\DAV;
-use Sabre\CalDAV;
-
-/**
- * Invite property
- *
- * This property encodes the 'invite' property, as defined by
- * the 'caldav-sharing-02' spec, in the http://calendarserver.org/ns/
- * namespace.
- *
- * @see https://trac.calendarserver.org/browser/CalendarServer/trunk/doc/Extensions/caldav-sharing-02.txt
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class Invite extends DAV\Property {
-
-    /**
-     * The list of users a calendar has been shared to.
-     *
-     * @var array
-     */
-    protected $users;
-
-    /**
-     * The organizer contains information about the person who shared the
-     * object.
-     *
-     * @var array
-     */
-    protected $organizer;
-
-    /**
-     * 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
-     */
-    public function __construct(array $users, array $organizer = null) {
-
-        $this->users = $users;
-        $this->organizer = $organizer;
-
-    }
-
-    /**
-     * Returns the list of users, as it was passed to the constructor.
-     *
-     * @return array
-     */
-    public function getValue() {
-
-        return $this->users;
-
-    }
-
-    /**
-     * Serializes the property in a DOMDocument
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $node
-     * @return void
-     */
-    public function serialize(DAV\Server $server,\DOMElement $node) {
-
-       $doc = $node->ownerDocument;
-
-       if (!is_null($this->organizer)) {
-
-           $xorganizer = $doc->createElement('cs:organizer');
-
-           $href = $doc->createElement('d:href');
-           $href->appendChild($doc->createTextNode($this->organizer['href']));
-           $xorganizer->appendChild($href);
-
-           if (isset($this->organizer['commonName']) && $this->organizer['commonName']) {
-               $commonName = $doc->createElement('cs:common-name');
-               $commonName->appendChild($doc->createTextNode($this->organizer['commonName']));
-               $xorganizer->appendChild($commonName);
-           }
-           if (isset($this->organizer['firstName']) && $this->organizer['firstName']) {
-               $firstName = $doc->createElement('cs:first-name');
-               $firstName->appendChild($doc->createTextNode($this->organizer['firstName']));
-               $xorganizer->appendChild($firstName);
-           }
-           if (isset($this->organizer['lastName']) && $this->organizer['lastName']) {
-               $lastName = $doc->createElement('cs:last-name');
-               $lastName->appendChild($doc->createTextNode($this->organizer['lastName']));
-               $xorganizer->appendChild($lastName);
-           }
-
-           $node->appendChild($xorganizer);
-
-
-       }
-
-       foreach($this->users as $user) {
-
-           $xuser = $doc->createElement('cs:user');
-
-           $href = $doc->createElement('d:href');
-           $href->appendChild($doc->createTextNode($user['href']));
-           $xuser->appendChild($href);
-
-           if (isset($user['commonName']) && $user['commonName']) {
-               $commonName = $doc->createElement('cs:common-name');
-               $commonName->appendChild($doc->createTextNode($user['commonName']));
-               $xuser->appendChild($commonName);
-           }
-
-           switch($user['status']) {
-
-               case SharingPlugin::STATUS_ACCEPTED :
-                   $status = $doc->createElement('cs:invite-accepted');
-                   $xuser->appendChild($status);
-                   break;
-               case SharingPlugin::STATUS_DECLINED :
-                   $status = $doc->createElement('cs:invite-declined');
-                   $xuser->appendChild($status);
-                   break;
-               case SharingPlugin::STATUS_NORESPONSE :
-                   $status = $doc->createElement('cs:invite-noresponse');
-                   $xuser->appendChild($status);
-                   break;
-               case SharingPlugin::STATUS_INVALID :
-                   $status = $doc->createElement('cs:invite-invalid');
-                   $xuser->appendChild($status);
-                   break;
-
-           }
-
-           $xaccess = $doc->createElement('cs:access');
-
-           if ($user['readOnly']) {
-                $xaccess->appendChild(
-                    $doc->createElement('cs:read')
-                );
-           } else {
-                $xaccess->appendChild(
-                    $doc->createElement('cs:read-write')
-                );
-           }
-           $xuser->appendChild($xaccess);
-
-           if (isset($user['summary']) && $user['summary']) {
-               $summary = $doc->createElement('cs:summary');
-               $summary->appendChild($doc->createTextNode($user['summary']));
-               $xuser->appendChild($summary);
-           }
-
-           $node->appendChild($xuser);
-
-       }
-
-
-    }
-
-    /**
-     * Unserializes the property.
-     *
-     * This static method should return a an instance of this object.
-     *
-     * @param \DOMElement $prop
-     * @return DAV\IProperty
-     */
-    static function unserialize(\DOMElement $prop) {
-
-        $xpath = new \DOMXPath($prop->ownerDocument);
-        $xpath->registerNamespace('cs', CalDAV\Plugin::NS_CALENDARSERVER);
-        $xpath->registerNamespace('d',  'urn:DAV');
-
-        $users = array();
-
-        foreach($xpath->query('cs:user', $prop) as $user) {
-
-            $status = null;
-            if ($xpath->evaluate('boolean(cs:invite-accepted)', $user)) {
-                $status = SharingPlugin::STATUS_ACCEPTED;
-            } elseif ($xpath->evaluate('boolean(cs:invite-declined)', $user)) {
-                $status = SharingPlugin::STATUS_DECLINED;
-            } elseif ($xpath->evaluate('boolean(cs:invite-noresponse)', $user)) {
-                $status = SharingPlugin::STATUS_NORESPONSE;
-            } elseif ($xpath->evaluate('boolean(cs:invite-invalid)', $user)) {
-                $status = SharingPlugin::STATUS_INVALID;
-            } else {
-                throw new DAV\Exception('Every cs:user property must have one of cs:invite-accepted, cs:invite-declined, cs:invite-noresponse or cs:invite-invalid');
-            }
-            $users[] = array(
-                'href' => $xpath->evaluate('string(d:href)', $user),
-                'commonName' => $xpath->evaluate('string(cs:common-name)', $user),
-                'readOnly' => $xpath->evaluate('boolean(cs:access/cs:read)', $user),
-                'summary' => $xpath->evaluate('string(cs:summary)', $user),
-                'status' => $status,
-            );
-
-        }
-
-        return new self($users);
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Property/ScheduleCalendarTransp.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Property/ScheduleCalendarTransp.php
deleted file mode 100644
index 7f12d7585..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Property/ScheduleCalendarTransp.php
+++ /dev/null
@@ -1,102 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Property;
-
-use Sabre\DAV;
-use Sabre\CalDAV;
-
-/**
- * schedule-calendar-transp property.
- *
- * This property is a representation of the schedule-calendar-transp property.
- * This property is defined in RFC6638 (caldav scheduling).
- *
- * Its values are either 'transparent' or 'opaque'. If it's transparent, it
- * means that this calendar will not be taken into consideration when a
- * different user queries for free-busy information. If it's 'opaque', it will.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class ScheduleCalendarTransp extends DAV\Property {
-
-    const TRANSPARENT = 'transparent';
-    const OPAQUE = 'opaque';
-
-    protected $value;
-
-    /**
-     * Creates the property
-     *
-     * @param string $value
-     */
-    public function __construct($value) {
-
-        if ($value !== self::TRANSPARENT && $value !== self::OPAQUE) {
-            throw new \InvalidArgumentException('The value must either be specified as "transparent" or "opaque"');
-        }
-        $this->value = $value;
-
-    }
-
-    /**
-     * Returns the current value
-     *
-     * @return string
-     */
-    public function getValue() {
-
-        return $this->value;
-
-    }
-
-    /**
-     * Serializes the property in a DOMDocument
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $node
-     * @return void
-     */
-    public function serialize(DAV\Server $server,\DOMElement $node) {
-
-        $doc = $node->ownerDocument;
-        switch($this->value) {
-            case self::TRANSPARENT :
-                $xval = $doc->createElement('cal:transparent');
-                break;
-            case self::OPAQUE :
-                $xval = $doc->createElement('cal:opaque');
-                break;
-        }
-
-        $node->appendChild($xval);
-
-    }
-
-    /**
-     * Unserializes the DOMElement back into a Property class.
-     *
-     * @param \DOMElement $node
-     * @return ScheduleCalendarTransp
-     */
-    static function unserialize(\DOMElement $node) {
-
-        $value = null;
-        foreach($node->childNodes as $childNode) {
-            switch(DAV\XMLUtil::toClarkNotation($childNode)) {
-                case '{' . CalDAV\Plugin::NS_CALDAV . '}opaque' :
-                    $value = self::OPAQUE;
-                    break;
-                case '{' . CalDAV\Plugin::NS_CALDAV . '}transparent' :
-                    $value = self::TRANSPARENT;
-                    break;
-            }
-        }
-        if (is_null($value))
-           return null;
-
-        return new self($value);
-
-    }
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Property/SupportedCalendarComponentSet.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Property/SupportedCalendarComponentSet.php
deleted file mode 100644
index 2538fa45d..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Property/SupportedCalendarComponentSet.php
+++ /dev/null
@@ -1,88 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Property;
-
-use Sabre\DAV;
-use Sabre\CalDAV;
-
-/**
- * Supported component set property
- *
- * This property is a representation of the supported-calendar_component-set
- * property in the CalDAV namespace. It simply requires an array of components,
- * such as VEVENT, VTODO
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class SupportedCalendarComponentSet extends DAV\Property {
-
-    /**
-     * List of supported components, such as "VEVENT, VTODO"
-     *
-     * @var array
-     */
-    private $components;
-
-    /**
-     * Creates the property
-     *
-     * @param array $components
-     */
-    public function __construct(array $components) {
-
-       $this->components = $components;
-
-    }
-
-    /**
-     * Returns the list of supported components
-     *
-     * @return array
-     */
-    public function getValue() {
-
-        return $this->components;
-
-    }
-
-    /**
-     * Serializes the property in a DOMDocument
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $node
-     * @return void
-     */
-    public function serialize(DAV\Server $server,\DOMElement $node) {
-
-       $doc = $node->ownerDocument;
-       foreach($this->components as $component) {
-
-            $xcomp = $doc->createElement('cal:comp');
-            $xcomp->setAttribute('name',$component);
-            $node->appendChild($xcomp);
-
-       }
-
-    }
-
-    /**
-     * Unserializes the DOMElement back into a Property class.
-     *
-     * @param \DOMElement $node
-     * @return Property_SupportedCalendarComponentSet
-     */
-    static function unserialize(\DOMElement $node) {
-
-        $components = array();
-        foreach($node->childNodes as $childNode) {
-            if (DAV\XMLUtil::toClarkNotation($childNode)==='{' . CalDAV\Plugin::NS_CALDAV . '}comp') {
-                $components[] = $childNode->getAttribute('name');
-            }
-        }
-        return new self($components);
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Property/SupportedCalendarData.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Property/SupportedCalendarData.php
deleted file mode 100644
index efab80a91..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Property/SupportedCalendarData.php
+++ /dev/null
@@ -1,40 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Property;
-use Sabre\DAV;
-use Sabre\CalDAV\Plugin;
-
-/**
- * Supported-calendar-data property
- *
- * This property is a representation of the supported-calendar-data property
- * in the CalDAV namespace. SabreDAV only has support for text/calendar;2.0
- * so the value is currently hardcoded.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class SupportedCalendarData extends DAV\Property {
-
-    /**
-     * Serializes the property in a DOMDocument
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $node
-     * @return void
-     */
-    public function serialize(DAV\Server $server,\DOMElement $node) {
-
-        $doc = $node->ownerDocument;
-
-        $prefix = isset($server->xmlNamespaces[Plugin::NS_CALDAV])?$server->xmlNamespaces[Plugin::NS_CALDAV]:'cal';
-
-        $caldata = $doc->createElement($prefix . ':calendar-data');
-        $caldata->setAttribute('content-type','text/calendar');
-        $caldata->setAttribute('version','2.0');
-
-        $node->appendChild($caldata);
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Property/SupportedCollationSet.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Property/SupportedCollationSet.php
deleted file mode 100644
index 63c37fe5a..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Property/SupportedCollationSet.php
+++ /dev/null
@@ -1,45 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Property;
-use Sabre\DAV;
-
-/**
- * supported-collation-set property
- *
- * This property is a representation of the supported-collation-set property
- * in the CalDAV namespace.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class SupportedCollationSet extends DAV\Property {
-
-    /**
-     * Serializes the property in a DOM document
-     *
-     * @param DAV\Server $server
-     * @param \DOMElement $node
-     * @return void
-     */
-    public function serialize(DAV\Server $server,\DOMElement $node) {
-
-        $doc = $node->ownerDocument;
-
-        $prefix = $node->lookupPrefix('urn:ietf:params:xml:ns:caldav');
-        if (!$prefix) $prefix = 'cal';
-
-        $node->appendChild(
-            $doc->createElement($prefix . ':supported-collation','i;ascii-casemap')
-        );
-        $node->appendChild(
-            $doc->createElement($prefix . ':supported-collation','i;octet')
-        );
-        $node->appendChild(
-            $doc->createElement($prefix . ':supported-collation','i;unicode-casemap')
-        );
-
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Schedule/IMip.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Schedule/IMip.php
deleted file mode 100644
index b2b0d98b1..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Schedule/IMip.php
+++ /dev/null
@@ -1,111 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Schedule;
-
-use Sabre\VObject;
-use Sabre\DAV;
-
-/**
- * iMIP handler.
- *
- * This class is responsible for sending out iMIP messages. iMIP is the
- * email-based transport for iTIP. iTIP deals with scheduling operations for
- * iCalendar objects.
- *
- * If you want to customize the email that gets sent out, you can do so by
- * extending this class and overriding the sendMessage method.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class IMip {
-
-    /**
-     * Email address used in From: header.
-     *
-     * @var string
-     */
-    protected $senderEmail;
-
-    /**
-     * Creates the email handler.
-     *
-     * @param string $senderEmail. The 'senderEmail' is the email that shows up
-     *                             in the 'From:' address. This should
-     *                             generally be some kind of no-reply email
-     *                             address you own.
-     */
-    public function __construct($senderEmail) {
-
-        $this->senderEmail = $senderEmail;
-
-    }
-
-    /**
-     * Sends one or more iTip messages through email.
-     *
-     * @param string $originator Originator Email
-     * @param array $recipients Array of email addresses
-     * @param VObject\Component $vObject
-     * @param string $principal Principal Url of the originator
-     * @return void
-     */
-    public function sendMessage($originator, array $recipients, VObject\Component $vObject, $principal) {
-
-        foreach($recipients as $recipient) {
-
-            $to = $recipient;
-            $replyTo = $originator;
-            $subject = 'SabreDAV iTIP message';
-
-            switch(strtoupper($vObject->METHOD)) {
-                case 'REPLY' :
-                    $subject = 'Response for: ' . $vObject->VEVENT->SUMMARY;
-                    break;
-                case 'REQUEST' :
-                    $subject = 'Invitation for: ' .$vObject->VEVENT->SUMMARY;
-                    break;
-                case 'CANCEL' :
-                    $subject = 'Cancelled event: ' . $vObject->VEVENT->SUMMARY;
-                    break;
-            }
-
-            $headers = array();
-            $headers[] = 'Reply-To: ' . $replyTo;
-            $headers[] = 'From: ' . $this->senderEmail;
-            $headers[] = 'Content-Type: text/calendar; method=' . (string)$vObject->method . '; charset=utf-8';
-            if (DAV\Server::$exposeVersion) {
-                $headers[] = 'X-Sabre-Version: ' . DAV\Version::VERSION . '-' . DAV\Version::STABILITY;
-            }
-
-            $vcalBody = $vObject->serialize();
-
-            $this->mail($to, $subject, $vcalBody, $headers);
-
-        }
-
-    }
-
-    // @codeCoverageIgnoreStart
-    // This is deemed untestable in a reasonable manner
-
-    /**
-     * This function is reponsible for sending the actual email.
-     *
-     * @param string $to Recipient email address
-     * @param string $subject Subject of the email
-     * @param string $body iCalendar body
-     * @param array $headers List of headers
-     * @return void
-     */
-    protected function mail($to, $subject, $body, array $headers) {
-
-
-        mail($to, $subject, $body, implode("\r\n", $headers));
-
-    }
-
-    // @codeCoverageIgnoreEnd
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Schedule/IOutbox.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Schedule/IOutbox.php
deleted file mode 100644
index 7341eaa85..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Schedule/IOutbox.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Schedule;
-
-/**
- * Implement this interface to have a node be recognized as a CalDAV scheduling
- * outbox.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-interface IOutbox extends \Sabre\DAV\ICollection, \Sabre\DAVACL\IACL {
-
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Schedule/Outbox.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Schedule/Outbox.php
deleted file mode 100644
index cf4500f69..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Schedule/Outbox.php
+++ /dev/null
@@ -1,163 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV\Schedule;
-use Sabre\DAV;
-use Sabre\CalDAV;
-use Sabre\DAVACL;
-
-/**
- * The CalDAV scheduling outbox
- *
- * The outbox is mainly used as an endpoint in the tree for a client to do
- * free-busy requests. This functionality is completely handled by the
- * Scheduling plugin, so this object is actually mostly static.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class Outbox extends DAV\Collection implements IOutbox {
-
-    /**
-     * The principal Uri
-     *
-     * @var string
-     */
-    protected $principalUri;
-
-    /**
-     * Constructor
-     *
-     * @param string $principalUri
-     */
-    public function __construct($principalUri) {
-
-        $this->principalUri = $principalUri;
-
-    }
-
-    /**
-     * Returns the name of the node.
-     *
-     * This is used to generate the url.
-     *
-     * @return string
-     */
-    public function getName() {
-
-        return 'outbox';
-
-    }
-
-    /**
-     * Returns an array with all the child nodes
-     *
-     * @return \Sabre\DAV\INode[]
-     */
-    public function getChildren() {
-
-        return array();
-
-    }
-
-    /**
-     * Returns the owner principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public function getOwner() {
-
-        return $this->principalUri;
-
-    }
-
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public 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
-     */
-    public function getACL() {
-
-        return array(
-            array(
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-query-freebusy',
-                'principal' => $this->getOwner(),
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-post-vevent',
-                'principal' => $this->getOwner(),
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => $this->getOwner(),
-                'protected' => true,
-            ),
-        );
-
-    }
-
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    public 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
-     */
-    public function getSupportedPrivilegeSet() {
-
-        $default = DAVACL\Plugin::getDefaultSupportedPrivilegeSet();
-        $default['aggregates'][] = array(
-            'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-query-freebusy',
-        );
-        $default['aggregates'][] = array(
-            'privilege' => '{' . CalDAV\Plugin::NS_CALDAV . '}schedule-post-vevent',
-        );
-
-        return $default;
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/ShareableCalendar.php b/vendor/sabre/dav/lib/Sabre/CalDAV/ShareableCalendar.php
deleted file mode 100644
index cabf7eb95..000000000
--- a/vendor/sabre/dav/lib/Sabre/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) 2007-2014 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
-     */
-    public 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
-     */
-    public 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 $value
-     * @return void
-     */
-    public function setPublishStatus($value) {
-
-        $this->caldavBackend->setPublishStatus($this->calendarInfo['id'], $value);
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/SharedCalendar.php b/vendor/sabre/dav/lib/Sabre/CalDAV/SharedCalendar.php
deleted file mode 100644
index 79eda43ab..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/SharedCalendar.php
+++ /dev/null
@@ -1,116 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-use Sabre\DAVACL;
-
-/**
- * This object represents a CalDAV calendar that is shared by a different user.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class SharedCalendar extends Calendar implements ISharedCalendar {
-
-    /**
-     * Constructor
-     *
-     * @param Backend\BackendInterface $caldavBackend
-     * @param array $calendarInfo
-     */
-    public function __construct(Backend\BackendInterface $caldavBackend, $calendarInfo) {
-
-        $required = array(
-            '{http://calendarserver.org/ns/}shared-url',
-            '{http://sabredav.org/ns}owner-principal',
-            '{http://sabredav.org/ns}read-only',
-        );
-        foreach($required as $r) {
-            if (!isset($calendarInfo[$r])) {
-                throw new \InvalidArgumentException('The ' . $r . ' property must be specified for SharedCalendar(s)');
-            }
-        }
-
-        parent::__construct($caldavBackend, $calendarInfo);
-
-    }
-
-    /**
-     * This method should return the url of the owners' copy of the shared
-     * calendar.
-     *
-     * @return string
-     */
-    public function getSharedUrl() {
-
-        return $this->calendarInfo['{http://calendarserver.org/ns/}shared-url'];
-
-    }
-
-    /**
-     * Returns the owner principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public function getOwner() {
-
-        return $this->calendarInfo['{http://sabredav.org/ns}owner-principal'];
-
-    }
-
-    /**
-     * 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
-     */
-    public 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[] = array(
-            'privilege' => '{DAV:}read',
-            'principal' => $this->calendarInfo['principaluri'],
-            'protected' => true,
-        );
-        if (!$this->calendarInfo['{http://sabredav.org/ns}read-only']) {
-            $acl[] = array(
-                'privilege' => '{DAV:}write',
-                'principal' => $this->calendarInfo['principaluri'],
-                'protected' => true,
-            );
-        }
-        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
-     */
-    public function getShares() {
-
-        return $this->caldavBackend->getShares($this->calendarInfo['id']);
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/SharingPlugin.php b/vendor/sabre/dav/lib/Sabre/CalDAV/SharingPlugin.php
deleted file mode 100644
index e869cb278..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/SharingPlugin.php
+++ /dev/null
@@ -1,526 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-use Sabre\DAV;
-
-/**
- * This plugin implements support for caldav sharing.
- *
- * This spec is defined at:
- * http://svn.calendarserver.org/repository/calendarserver/CalendarServer/trunk/doc/Extensions/caldav-sharing.txt
- *
- * See:
- * Sabre\CalDAV\Backend\SharingSupport for all the documentation.
- *
- * Note: This feature is experimental, and may change in between different
- * SabreDAV versions.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-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
-     */
-    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
-     */
-    public function getFeatures() {
-
-        return array('calendarserver-sharing');
-
-    }
-
-    /**
-     * Returns a plugin name.
-     *
-     * Using this name other plugins will be able to access other plugins
-     * using Sabre\DAV\Server::getPlugin
-     *
-     * @return string
-     */
-    public function getPluginName() {
-
-        return 'caldav-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 DAV\Server $server
-     * @return void
-     */
-    public function initialize(DAV\Server $server) {
-
-        $this->server = $server;
-        $server->resourceTypeMapping['Sabre\\CalDAV\\ISharedCalendar'] = '{' . Plugin::NS_CALENDARSERVER . '}shared';
-
-        array_push(
-            $this->server->protectedProperties,
-            '{' . Plugin::NS_CALENDARSERVER . '}invite',
-            '{' . Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes',
-            '{' . Plugin::NS_CALENDARSERVER . '}shared-url'
-        );
-
-        $this->server->subscribeEvent('beforeGetProperties', array($this, 'beforeGetProperties'));
-        $this->server->subscribeEvent('afterGetProperties', array($this, 'afterGetProperties'));
-        $this->server->subscribeEvent('updateProperties', array($this, 'updateProperties'));
-        $this->server->subscribeEvent('unknownMethod', array($this,'unknownMethod'));
-
-    }
-
-    /**
-     * This event is triggered when properties are requested for a certain
-     * node.
-     *
-     * This allows us to inject any properties early.
-     *
-     * @param string $path
-     * @param DAV\INode $node
-     * @param array $requestedProperties
-     * @param array $returnedProperties
-     * @return void
-     */
-    public function beforeGetProperties($path, DAV\INode $node, &$requestedProperties, &$returnedProperties) {
-
-        if ($node instanceof IShareableCalendar) {
-            if (($index = array_search('{' . Plugin::NS_CALENDARSERVER . '}invite', $requestedProperties))!==false) {
-
-                unset($requestedProperties[$index]);
-                $returnedProperties[200]['{' . Plugin::NS_CALENDARSERVER . '}invite'] =
-                    new Property\Invite(
-                        $node->getShares()
-                    );
-
-            }
-
-        }
-
-        if ($node instanceof ISharedCalendar) {
-
-            if (($index = array_search('{' . Plugin::NS_CALENDARSERVER . '}shared-url', $requestedProperties))!==false) {
-
-                unset($requestedProperties[$index]);
-                $returnedProperties[200]['{' . Plugin::NS_CALENDARSERVER . '}shared-url'] =
-                    new DAV\Property\Href(
-                        $node->getSharedUrl()
-                    );
-
-            }
-            // The 'invite' property is slightly different for the 'shared'
-            // instance of the calendar, as it also contains the owner
-            // information.
-            if (($index = array_search('{' . Plugin::NS_CALENDARSERVER . '}invite', $requestedProperties))!==false) {
-
-                unset($requestedProperties[$index]);
-
-                // Fetching owner information
-                $props = $this->server->getPropertiesForPath($node->getOwner(), array(
-                    '{http://sabredav.org/ns}email-address',
-                    '{DAV:}displayname',
-                ), 1);
-
-                $ownerInfo = array(
-                    'href' => $node->getOwner(),
-                );
-
-                if (isset($props[0][200])) {
-
-                    // We're mapping the internal webdav properties to the
-                    // elements caldav-sharing expects.
-                    if (isset($props[0][200]['{http://sabredav.org/ns}email-address'])) {
-                        $ownerInfo['href'] = 'mailto:' . $props[0][200]['{http://sabredav.org/ns}email-address'];
-                    }
-                    if (isset($props[0][200]['{DAV:}displayname'])) {
-                        $ownerInfo['commonName'] = $props[0][200]['{DAV:}displayname'];
-                    }
-
-                }
-
-                $returnedProperties[200]['{' . Plugin::NS_CALENDARSERVER . '}invite'] =
-                    new Property\Invite(
-                        $node->getShares(),
-                        $ownerInfo
-                    );
-
-            }
-
-
-        }
-
-    }
-
-    /**
-     * This method is triggered *after* all properties have been retrieved.
-     * This allows us to inject the correct resourcetype for calendars that
-     * have been shared.
-     *
-     * @param string $path
-     * @param array $properties
-     * @param DAV\INode $node
-     * @return void
-     */
-    public function afterGetProperties($path, &$properties, DAV\INode $node) {
-
-        if ($node instanceof IShareableCalendar) {
-            if (isset($properties[200]['{DAV:}resourcetype'])) {
-                if (count($node->getShares())>0) {
-                    $properties[200]['{DAV:}resourcetype']->add(
-                        '{' . Plugin::NS_CALENDARSERVER . '}shared-owner'
-                    );
-                }
-            }
-            $propName = '{' . Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes';
-            if (array_key_exists($propName, $properties[404])) {
-                unset($properties[404][$propName]);
-                $properties[200][$propName] = new Property\AllowedSharingModes(true,false);
-            }
-
-        }
-
-    }
-
-    /**
-     * This method is trigged when a user attempts to update a node's
-     * properties.
-     *
-     * A previous draft of the sharing spec stated that it was possible to use
-     * PROPPATCH to remove 'shared-owner' from the resourcetype, thus unsharing
-     * the calendar.
-     *
-     * Even though this is no longer in the current spec, we keep this around
-     * because OS X 10.7 may still make use of this feature.
-     *
-     * @param array $mutations
-     * @param array $result
-     * @param DAV\INode $node
-     * @return void
-     */
-    public function updateProperties(array &$mutations, array &$result, DAV\INode $node) {
-
-        if (!$node instanceof IShareableCalendar)
-            return;
-
-        if (!isset($mutations['{DAV:}resourcetype'])) {
-            return;
-        }
-
-        // Only doing something if shared-owner is indeed not in the list.
-        if($mutations['{DAV:}resourcetype']->is('{' . Plugin::NS_CALENDARSERVER . '}shared-owner')) return;
-
-        $shares = $node->getShares();
-        $remove = array();
-        foreach($shares as $share) {
-            $remove[] = $share['href'];
-        }
-        $node->updateShares(array(), $remove);
-
-        // We're marking this update as 200 OK
-        $result[200]['{DAV:}resourcetype'] = null;
-
-        // Removing it from the mutations list
-        unset($mutations['{DAV:}resourcetype']);
-
-    }
-
-    /**
-     * This event is triggered when the server didn't know how to handle a
-     * certain request.
-     *
-     * We intercept this to handle POST requests on calendars.
-     *
-     * @param string $method
-     * @param string $uri
-     * @return null|bool
-     */
-    public function unknownMethod($method, $uri) {
-
-        if ($method!=='POST') {
-            return;
-        }
-
-        // Only handling xml
-        $contentType = $this->server->httpRequest->getHeader('Content-Type');
-        if (strpos($contentType,'application/xml')===false && strpos($contentType,'text/xml')===false)
-            return;
-
-        // Making sure the node exists
-        try {
-            $node = $this->server->tree->getNodeForPath($uri);
-        } catch (DAV\Exception\NotFound $e) {
-            return;
-        }
-
-        $requestBody = $this->server->httpRequest->getBody(true);
-
-        // If this request handler could not deal with this POST request, it
-        // will return 'null' and other plugins get a chance to handle the
-        // request.
-        //
-        // However, we already requested the full body. This is a problem,
-        // because a body can only be read once. This is why we preemptively
-        // re-populated the request body with the existing data.
-        $this->server->httpRequest->setBody($requestBody);
-
-        $dom = DAV\XMLUtil::loadDOMDocument($requestBody);
-
-        $documentType = DAV\XMLUtil::toClarkNotation($dom->firstChild);
-
-        switch($documentType) {
-
-            // Dealing with the 'share' document, which modified invitees on a
-            // calendar.
-            case '{' . Plugin::NS_CALENDARSERVER . '}share' :
-
-                // We can only deal with IShareableCalendar objects
-                if (!$node instanceof IShareableCalendar) {
-                    return;
-                }
-
-                // Getting ACL info
-                $acl = $this->server->getPlugin('acl');
-
-                // If there's no ACL support, we allow everything
-                if ($acl) {
-                    $acl->checkPrivileges($uri, '{DAV:}write');
-                }
-
-                $mutations = $this->parseShareRequest($dom);
-
-                $node->updateShares($mutations[0], $mutations[1]);
-
-                $this->server->httpResponse->sendStatus(200);
-                // Adding this because sending a response body may cause issues,
-                // and I wanted some type of indicator the response was handled.
-                $this->server->httpResponse->setHeader('X-Sabre-Status', 'everything-went-well');
-
-                // Breaking the event chain
-                return false;
-
-            // The invite-reply document is sent when the user replies to an
-            // invitation of a calendar share.
-            case '{'. Plugin::NS_CALENDARSERVER.'}invite-reply' :
-
-                // This only works on the calendar-home-root node.
-                if (!$node instanceof UserCalendars) {
-                    return;
-                }
-
-                // Getting ACL info
-                $acl = $this->server->getPlugin('acl');
-
-                // If there's no ACL support, we allow everything
-                if ($acl) {
-                    $acl->checkPrivileges($uri, '{DAV:}write');
-                }
-
-                $message = $this->parseInviteReplyRequest($dom);
-
-                $url = $node->shareReply(
-                    $message['href'],
-                    $message['status'],
-                    $message['calendarUri'],
-                    $message['inReplyTo'],
-                    $message['summary']
-                );
-
-                $this->server->httpResponse->sendStatus(200);
-                // Adding this because sending a response body may cause issues,
-                // and I wanted some type of indicator the response was handled.
-                $this->server->httpResponse->setHeader('X-Sabre-Status', 'everything-went-well');
-
-                if ($url) {
-                    $dom = new \DOMDocument('1.0', 'UTF-8');
-                    $dom->formatOutput = true;
-
-                    $root = $dom->createElement('cs:shared-as');
-                    foreach($this->server->xmlNamespaces as $namespace => $prefix) {
-                        $root->setAttribute('xmlns:' . $prefix, $namespace);
-                    }
-
-                    $dom->appendChild($root);
-                    $href = new DAV\Property\Href($url);
-
-                    $href->serialize($this->server, $root);
-                    $this->server->httpResponse->setHeader('Content-Type','application/xml');
-                    $this->server->httpResponse->sendBody($dom->saveXML());
-
-                }
-
-                // Breaking the event chain
-                return false;
-
-            case '{' . Plugin::NS_CALENDARSERVER . '}publish-calendar' :
-
-                // We can only deal with IShareableCalendar objects
-                if (!$node instanceof IShareableCalendar) {
-                    return;
-                }
-
-                // Getting ACL info
-                $acl = $this->server->getPlugin('acl');
-
-                // If there's no ACL support, we allow everything
-                if ($acl) {
-                    $acl->checkPrivileges($uri, '{DAV:}write');
-                }
-
-                $node->setPublishStatus(true);
-
-                // iCloud sends back the 202, so we will too.
-                $this->server->httpResponse->sendStatus(202);
-
-                // Adding this because sending a response body may cause issues,
-                // and I wanted some type of indicator the response was handled.
-                $this->server->httpResponse->setHeader('X-Sabre-Status', 'everything-went-well');
-
-                // Breaking the event chain
-                return false;
-
-            case '{' . Plugin::NS_CALENDARSERVER . '}unpublish-calendar' :
-
-                // We can only deal with IShareableCalendar objects
-                if (!$node instanceof IShareableCalendar) {
-                    return;
-                }
-
-                // Getting ACL info
-                $acl = $this->server->getPlugin('acl');
-
-                // If there's no ACL support, we allow everything
-                if ($acl) {
-                    $acl->checkPrivileges($uri, '{DAV:}write');
-                }
-
-                $node->setPublishStatus(false);
-
-                $this->server->httpResponse->sendStatus(200);
-
-                // Adding this because sending a response body may cause issues,
-                // and I wanted some type of indicator the response was handled.
-                $this->server->httpResponse->setHeader('X-Sabre-Status', 'everything-went-well');
-
-                // Breaking the event chain
-                return false;
-
-        }
-
-
-
-    }
-
-    /**
-     * Parses the 'share' POST request.
-     *
-     * This method returns an array, containing two arrays.
-     * The first array is a list of new sharees. Every element is a struct
-     * containing a:
-     *   * href element. (usually a mailto: address)
-     *   * commonName element (often a first and lastname, but can also be
-     *     false)
-     *   * readOnly (true or false)
-     *   * summary (A description of the share, can also be false)
-     *
-     * The second array is a list of sharees that are to be removed. This is
-     * just a simple array with 'hrefs'.
-     *
-     * @param \DOMDocument $dom
-     * @return array
-     */
-    protected function parseShareRequest(\DOMDocument $dom) {
-
-        $xpath = new \DOMXPath($dom);
-        $xpath->registerNamespace('cs', Plugin::NS_CALENDARSERVER);
-        $xpath->registerNamespace('d', 'urn:DAV');
-
-        $set = array();
-        $elems = $xpath->query('cs:set');
-
-        for($i=0; $i < $elems->length; $i++) {
-
-            $xset = $elems->item($i);
-            $set[] = array(
-                'href' => $xpath->evaluate('string(d:href)', $xset),
-                'commonName' => $xpath->evaluate('string(cs:common-name)', $xset),
-                'summary' => $xpath->evaluate('string(cs:summary)', $xset),
-                'readOnly' => $xpath->evaluate('boolean(cs:read)', $xset)!==false
-            );
-
-        }
-
-        $remove = array();
-        $elems = $xpath->query('cs:remove');
-
-        for($i=0; $i < $elems->length; $i++) {
-
-            $xremove = $elems->item($i);
-            $remove[] = $xpath->evaluate('string(d:href)', $xremove);
-
-        }
-
-        return array($set, $remove);
-
-    }
-
-    /**
-     * Parses the 'invite-reply' POST request.
-     *
-     * This method returns an array, containing the following properties:
-     *   * href - The sharee who is replying
-     *   * status - One of the self::STATUS_* constants
-     *   * calendarUri - The url of the shared calendar
-     *   * inReplyTo - The unique id of the share invitation.
-     *   * summary - Optional description of the reply.
-     *
-     * @param \DOMDocument $dom
-     * @return array
-     */
-    protected function parseInviteReplyRequest(\DOMDocument $dom) {
-
-        $xpath = new \DOMXPath($dom);
-        $xpath->registerNamespace('cs', Plugin::NS_CALENDARSERVER);
-        $xpath->registerNamespace('d', 'urn:DAV');
-
-        $hostHref = $xpath->evaluate('string(cs:hosturl/d:href)');
-        if (!$hostHref) {
-            throw new DAV\Exception\BadRequest('The {' . Plugin::NS_CALENDARSERVER . '}hosturl/{DAV:}href element is required');
-        }
-
-        return array(
-            'href' => $xpath->evaluate('string(d:href)'),
-            'calendarUri' => $this->server->calculateUri($hostHref),
-            'inReplyTo' => $xpath->evaluate('string(cs:in-reply-to)'),
-            'summary' => $xpath->evaluate('string(cs:summary)'),
-            'status' => $xpath->evaluate('boolean(cs:invite-accepted)')?self::STATUS_ACCEPTED:self::STATUS_DECLINED
-        );
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/UserCalendars.php b/vendor/sabre/dav/lib/Sabre/CalDAV/UserCalendars.php
deleted file mode 100644
index 6e700eb04..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/UserCalendars.php
+++ /dev/null
@@ -1,342 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-use Sabre\DAV;
-use Sabre\DAVACL;
-
-/**
- * The UserCalenders class contains all calendars associated to one user
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class UserCalendars implements DAV\IExtendedCollection, DAVACL\IACL {
-
-    /**
-     * CalDAV backend
-     *
-     * @var Sabre\CalDAV\Backend\BackendInterface
-     */
-    protected $caldavBackend;
-
-    /**
-     * Principal information
-     *
-     * @var array
-     */
-    protected $principalInfo;
-
-    /**
-     * Constructor
-     *
-     * @param Backend\BackendInterface $caldavBackend
-     * @param mixed $userUri
-     */
-    public function __construct(Backend\BackendInterface $caldavBackend, $principalInfo) {
-
-        $this->caldavBackend = $caldavBackend;
-        $this->principalInfo = $principalInfo;
-
-    }
-
-    /**
-     * Returns the name of this object
-     *
-     * @return string
-     */
-    public function getName() {
-
-        list(,$name) = DAV\URLUtil::splitPath($this->principalInfo['uri']);
-        return $name;
-
-    }
-
-    /**
-     * Updates the name of this object
-     *
-     * @param string $name
-     * @return void
-     */
-    public function setName($name) {
-
-        throw new DAV\Exception\Forbidden();
-
-    }
-
-    /**
-     * Deletes this object
-     *
-     * @return void
-     */
-    public function delete() {
-
-        throw new DAV\Exception\Forbidden();
-
-    }
-
-    /**
-     * Returns the last modification date
-     *
-     * @return int
-     */
-    public function getLastModified() {
-
-        return null;
-
-    }
-
-    /**
-     * Creates a new file under this object.
-     *
-     * This is currently not allowed
-     *
-     * @param string $filename
-     * @param resource $data
-     * @return void
-     */
-    public function createFile($filename, $data=null) {
-
-        throw new DAV\Exception\MethodNotAllowed('Creating new files in this collection is not supported');
-
-    }
-
-    /**
-     * Creates a new directory under this object.
-     *
-     * This is currently not allowed.
-     *
-     * @param string $filename
-     * @return void
-     */
-    public function createDirectory($filename) {
-
-        throw new DAV\Exception\MethodNotAllowed('Creating new collections in this collection is not supported');
-
-    }
-
-    /**
-     * Returns a single calendar, by name
-     *
-     * @param string $name
-     * @todo needs optimizing
-     * @return Calendar
-     */
-    public function getChild($name) {
-
-        foreach($this->getChildren() as $child) {
-            if ($name==$child->getName())
-                return $child;
-
-        }
-        throw new DAV\Exception\NotFound('Calendar with name \'' . $name . '\' could not be found');
-
-    }
-
-    /**
-     * Checks if a calendar exists.
-     *
-     * @param string $name
-     * @todo needs optimizing
-     * @return bool
-     */
-    public function childExists($name) {
-
-        foreach($this->getChildren() as $child) {
-            if ($name==$child->getName())
-                return true;
-
-        }
-        return false;
-
-    }
-
-    /**
-     * Returns a list of calendars
-     *
-     * @return array
-     */
-    public function getChildren() {
-
-        $calendars = $this->caldavBackend->getCalendarsForUser($this->principalInfo['uri']);
-        $objs = array();
-        foreach($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);
-                }
-            } else {
-                $objs[] = new Calendar($this->caldavBackend, $calendar);
-            }
-        }
-        $objs[] = new Schedule\Outbox($this->principalInfo['uri']);
-
-        // We're adding a notifications node, if it's supported by the backend.
-        if ($this->caldavBackend instanceof Backend\NotificationSupport) {
-            $objs[] = new Notifications\Collection($this->caldavBackend, $this->principalInfo['uri']);
-        }
-        return $objs;
-
-    }
-
-    /**
-     * Creates a new calendar
-     *
-     * @param string $name
-     * @param array $resourceType
-     * @param array $properties
-     * @return void
-     */
-    public function createExtendedCollection($name, array $resourceType, array $properties) {
-
-        $isCalendar = false;
-        foreach($resourceType as $rt) {
-            switch ($rt) {
-                case '{DAV:}collection' :
-                case '{http://calendarserver.org/ns/}shared-owner' :
-                    // ignore
-                    break;
-                case '{urn:ietf:params:xml:ns:caldav}calendar' :
-                    $isCalendar = true;
-                    break;
-                default :
-                    throw new DAV\Exception\InvalidResourceType('Unknown resourceType: ' . $rt);
-            }
-        }
-        if (!$isCalendar) {
-            throw new DAV\Exception\InvalidResourceType('You can only create calendars in this collection');
-        }
-        $this->caldavBackend->createCalendar($this->principalInfo['uri'], $name, $properties);
-
-    }
-
-    /**
-     * Returns the owner principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public function getOwner() {
-
-        return $this->principalInfo['uri'];
-
-    }
-
-    /**
-     * Returns a group principal
-     *
-     * This must be a url to a principal, or null if there's no owner
-     *
-     * @return string|null
-     */
-    public 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
-     */
-    public function getACL() {
-
-        return array(
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => $this->principalInfo['uri'],
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => $this->principalInfo['uri'],
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => $this->principalInfo['uri'] . '/calendar-proxy-write',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}write',
-                'principal' => $this->principalInfo['uri'] . '/calendar-proxy-write',
-                'protected' => true,
-            ),
-            array(
-                'privilege' => '{DAV:}read',
-                'principal' => $this->principalInfo['uri'] . '/calendar-proxy-read',
-                'protected' => true,
-            ),
-
-        );
-
-    }
-
-    /**
-     * Updates the ACL
-     *
-     * This method will receive a list of new ACE's.
-     *
-     * @param array $acl
-     * @return void
-     */
-    public 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
-     */
-    public function getSupportedPrivilegeSet() {
-
-        return null;
-
-    }
-
-    /**
-     * This method is called when a user replied to a request to share.
-     *
-     * This method should return the url of the newly created calendar if the
-     * share was accepted.
-     *
-     * @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 $summary A description of the reply
-     * @return null|string
-     */
-    public function shareReply($href, $status, $calendarUri, $inReplyTo, $summary = null) {
-
-        if (!$this->caldavBackend instanceof Backend\SharingSupport) {
-            throw new DAV\Exception\NotImplemented('Sharing support is not implemented by this backend.');
-        }
-
-        return $this->caldavBackend->shareReply($href, $status, $calendarUri, $inReplyTo, $summary);
-
-    }
-
-}
diff --git a/vendor/sabre/dav/lib/Sabre/CalDAV/Version.php b/vendor/sabre/dav/lib/Sabre/CalDAV/Version.php
deleted file mode 100644
index f30fc20ea..000000000
--- a/vendor/sabre/dav/lib/Sabre/CalDAV/Version.php
+++ /dev/null
@@ -1,24 +0,0 @@
-<?php
-
-namespace Sabre\CalDAV;
-
-/**
- * This class contains the Sabre\CalDAV version constants.
- *
- * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
- * @author Evert Pot (http://evertpot.com/)
- * @license http://sabre.io/license/ Modified BSD License
- */
-class Version {
-
-    /**
-     * Full version number
-     */
-    const VERSION = '1.8.7';
-
-    /**
-     * Stability : alpha, beta, stable
-     */
-    const STABILITY = 'stable';
-
-}