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

1 files changed, 266 insertions, 0 deletions

diff --git a/vendor/sabre/xml/lib/Writer.php b/vendor/sabre/xml/lib/Writer.php
new file mode 100644
index 000000000..adfbe0cb0
--- /dev/null
+++ b/vendor/sabre/xml/lib/Writer.php
@@ -0,0 +1,266 @@
+<?php
+
+namespace Sabre\Xml;
+
+use XMLWriter;
+
+/**
+ * The XML Writer class.
+ *
+ * This class works exactly as PHP's built-in XMLWriter, with a few additions.
+ *
+ * Namespaces can be registered beforehand, globally. When the first element is
+ * written, namespaces will automatically be declared.
+ *
+ * The writeAttribute, startElement and writeElement can now take a
+ * clark-notation element name (example: {http://www.w3.org/2005/Atom}link).
+ *
+ * If, when writing the namespace is a known one a prefix will automatically be
+ * selected, otherwise a random prefix will be generated.
+ *
+ * Instead of standard string values, the writer can take Element classes (as
+ * defined by this library) to delegate the serialization.
+ *
+ * The write() method can take array structures to quickly write out simple xml
+ * trees.
+ *
+ * @copyright Copyright (C) 2009-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Writer extends XMLWriter {
+
+    use ContextStackTrait;
+
+    /**
+     * Any namespace that the writer is asked to write, will be added here.
+     *
+     * Any of these elements will get a new namespace definition *every single
+     * time* they are used, but this array allows the writer to make sure that
+     * the prefixes are consistent anyway.
+     *
+     * @var array
+     */
+    protected $adhocNamespaces = [];
+
+    /**
+     * When the first element is written, this flag is set to true.
+     *
+     * This ensures that the namespaces in the namespaces map are only written
+     * once.
+     *
+     * @var bool
+     */
+    protected $namespacesWritten = false;
+
+    /**
+     * Writes a value to the output stream.
+     *
+     * The following values are supported:
+     *   1. Scalar values will be written as-is, as text.
+     *   2. Null values will be skipped (resulting in a short xml tag).
+     *   3. If a value is an instance of an Element class, writing will be
+     *      delegated to the object.
+     *   4. If a value is an array, two formats are supported.
+     *
+     *  Array format 1:
+     *  [
+     *    "{namespace}name1" => "..",
+     *    "{namespace}name2" => "..",
+     *  ]
+     *
+     *  One element will be created for each key in this array. The values of
+     *  this array support any format this method supports (this method is
+     *  called recursively).
+     *
+     *  Array format 2:
+     *
+     *  [
+     *    [
+     *      "name" => "{namespace}name1"
+     *      "value" => "..",
+     *      "attributes" => [
+     *          "attr" => "attribute value",
+     *      ]
+     *    ],
+     *    [
+     *      "name" => "{namespace}name1"
+     *      "value" => "..",
+     *      "attributes" => [
+     *          "attr" => "attribute value",
+     *      ]
+     *    ]
+     * ]
+     *
+     * @param mixed $value
+     * @return void
+     */
+    function write($value) {
+
+        Serializer\standardSerializer($this, $value);
+
+    }
+
+    /**
+     * Opens a new element.
+     *
+     * You can either just use a local elementname, or you can use clark-
+     * notation to start a new element.
+     *
+     * Example:
+     *
+     *     $writer->startElement('{http://www.w3.org/2005/Atom}entry');
+     *
+     * Would result in something like:
+     *
+     *     <entry xmlns="http://w3.org/2005/Atom">
+     *
+     * @param string $name
+     * @return bool
+     */
+    function startElement($name) {
+
+        if ($name[0] === '{') {
+
+            list($namespace, $localName) =
+                Service::parseClarkNotation($name);
+
+            if (array_key_exists($namespace, $this->namespaceMap)) {
+                $result = $this->startElementNS(
+                    $this->namespaceMap[$namespace] === '' ?  null : $this->namespaceMap[$namespace],
+                    $localName,
+                    null
+                );
+            } else {
+
+                // An empty namespace means it's the global namespace. This is
+                // allowed, but it mustn't get a prefix.
+                if ($namespace === "" || $namespace === null) {
+                    $result = $this->startElement($localName);
+                    $this->writeAttribute('xmlns', '');
+                } else {
+                    if (!isset($this->adhocNamespaces[$namespace])) {
+                        $this->adhocNamespaces[$namespace] = 'x' . (count($this->adhocNamespaces) + 1);
+                    }
+                    $result = $this->startElementNS($this->adhocNamespaces[$namespace], $localName, $namespace);
+                }
+            }
+
+        } else {
+            $result = parent::startElement($name);
+        }
+
+        if (!$this->namespacesWritten) {
+
+            foreach ($this->namespaceMap as $namespace => $prefix) {
+                $this->writeAttribute(($prefix ? 'xmlns:' . $prefix : 'xmlns'), $namespace);
+            }
+            $this->namespacesWritten = true;
+
+        }
+
+        return $result;
+
+    }
+
+    /**
+     * Write a full element tag and it's contents.
+     *
+     * This method automatically closes the element as well.
+     *
+     * The element name may be specified in clark-notation.
+     *
+     * Examples:
+     *
+     *    $writer->writeElement('{http://www.w3.org/2005/Atom}author',null);
+     *    becomes:
+     *    <author xmlns="http://www.w3.org/2005" />
+     *
+     *    $writer->writeElement('{http://www.w3.org/2005/Atom}author', [
+     *       '{http://www.w3.org/2005/Atom}name' => 'Evert Pot',
+     *    ]);
+     *    becomes:
+     *    <author xmlns="http://www.w3.org/2005" /><name>Evert Pot</name></author>
+     *
+     * @param string $name
+     * @param string $content
+     * @return bool
+     */
+    function writeElement($name, $content = null) {
+
+        $this->startElement($name);
+        if (!is_null($content)) {
+            $this->write($content);
+        }
+        $this->endElement();
+
+    }
+
+    /**
+     * Writes a list of attributes.
+     *
+     * Attributes are specified as a key->value array.
+     *
+     * The key is an attribute name. If the key is a 'localName', the current
+     * xml namespace is assumed. If it's a 'clark notation key', this namespace
+     * will be used instead.
+     *
+     * @param array $attributes
+     * @return void
+     */
+    function writeAttributes(array $attributes) {
+
+        foreach ($attributes as $name => $value) {
+            $this->writeAttribute($name, $value);
+        }
+
+    }
+
+    /**
+     * Writes a new attribute.
+     *
+     * The name may be specified in clark-notation.
+     *
+     * Returns true when successful.
+     *
+     * @param string $name
+     * @param string $value
+     * @return bool
+     */
+    function writeAttribute($name, $value) {
+
+        if ($name[0] === '{') {
+
+            list(
+                $namespace,
+                $localName
+            ) = Service::parseClarkNotation($name);
+
+            if (array_key_exists($namespace, $this->namespaceMap)) {
+                // It's an attribute with a namespace we know
+                $this->writeAttribute(
+                    $this->namespaceMap[$namespace] . ':' . $localName,
+                    $value
+                );
+            } else {
+
+                // We don't know the namespace, we must add it in-line
+                if (!isset($this->adhocNamespaces[$namespace])) {
+                    $this->adhocNamespaces[$namespace] = 'x' . (count($this->adhocNamespaces) + 1);
+                }
+                $this->writeAttributeNS(
+                    $this->adhocNamespaces[$namespace],
+                    $localName,
+                    $namespace,
+                    $value
+                );
+
+            }
+
+        } else {
+            return parent::writeAttribute($name, $value);
+        }
+
+    }
+
+}