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

1 files changed, 308 insertions, 0 deletions

diff --git a/vendor/sabre/xml/lib/Reader.php b/vendor/sabre/xml/lib/Reader.php
new file mode 100644
index 000000000..7cba76c59
--- /dev/null
+++ b/vendor/sabre/xml/lib/Reader.php
@@ -0,0 +1,308 @@
+<?php
+
+namespace Sabre\Xml;
+
+use XMLReader;
+
+/**
+ * The Reader class expands upon PHP's built-in XMLReader.
+ *
+ * The intended usage, is to assign certain XML elements to PHP classes. These
+ * need to be registered using the $elementMap public property.
+ *
+ * After this is done, a single call to parse() will parse the entire document,
+ * and delegate sub-sections of the document to element classes.
+ *
+ * @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 Reader extends XMLReader {
+
+    use ContextStackTrait;
+
+    /**
+     * Returns the current nodename in clark-notation.
+     *
+     * For example: "{http://www.w3.org/2005/Atom}feed".
+     * Or if no namespace is defined: "{}feed".
+     *
+     * This method returns null if we're not currently on an element.
+     *
+     * @return string|null
+     */
+    function getClark() {
+
+        if (! $this->localName) {
+            return null;
+        }
+
+        return '{' . $this->namespaceURI . '}' . $this->localName;
+
+    }
+
+    /**
+     * Reads the entire document.
+     *
+     * This function returns an array with the following three elements:
+     *    * name - The root element name.
+     *    * value - The value for the root element.
+     *    * attributes - An array of attributes.
+     *
+     * This function will also disable the standard libxml error handler (which
+     * usually just results in PHP errors), and throw exceptions instead.
+     *
+     * @return array
+     */
+    function parse() {
+
+        $previousEntityState = libxml_disable_entity_loader(true);
+        $previousSetting = libxml_use_internal_errors(true);
+
+        // Really sorry about the silence operator, seems like I have no
+        // choice. See:
+        //
+        // https://bugs.php.net/bug.php?id=64230
+        while ($this->nodeType !== self::ELEMENT && @$this->read()) {
+            // noop
+        }
+        $result = $this->parseCurrentElement();
+
+        $errors = libxml_get_errors();
+        libxml_clear_errors();
+        libxml_use_internal_errors($previousSetting);
+        libxml_disable_entity_loader($previousEntityState);
+
+        if ($errors) {
+            throw new LibXMLException($errors);
+        }
+
+        return $result;
+    }
+
+
+
+    /**
+     * parseGetElements parses everything in the current sub-tree,
+     * and returns a an array of elements.
+     *
+     * Each element has a 'name', 'value' and 'attributes' key.
+     *
+     * If the the element didn't contain sub-elements, an empty array is always
+     * returned. If there was any text inside the element, it will be
+     * discarded.
+     *
+     * If the $elementMap argument is specified, the existing elementMap will
+     * be overridden while parsing the tree, and restored after this process.
+     *
+     * @param array $elementMap
+     * @return array
+     */
+    function parseGetElements(array $elementMap = null) {
+
+        $result = $this->parseInnerTree($elementMap);
+        if (!is_array($result)) {
+            return [];
+        }
+        return $result;
+
+    }
+
+    /**
+     * Parses all elements below the current element.
+     *
+     * This method will return a string if this was a text-node, or an array if
+     * there were sub-elements.
+     *
+     * If there's both text and sub-elements, the text will be discarded.
+     *
+     * If the $elementMap argument is specified, the existing elementMap will
+     * be overridden while parsing the tree, and restored after this process.
+     *
+     * @param array $elementMap
+     * @return array|string
+     */
+    function parseInnerTree(array $elementMap = null) {
+
+        $text = null;
+        $elements = [];
+
+        if ($this->nodeType === self::ELEMENT && $this->isEmptyElement) {
+            // Easy!
+            $this->next();
+            return null;
+        }
+
+        if (!is_null($elementMap)) {
+            $this->pushContext();
+            $this->elementMap = $elementMap;
+        }
+
+        // Really sorry about the silence operator, seems like I have no
+        // choice. See:
+        //
+        // https://bugs.php.net/bug.php?id=64230
+        if (!@$this->read()) return false;
+
+        while (true) {
+
+            if (!$this->isValid()) {
+
+                $errors = libxml_get_errors();
+
+                if ($errors) {
+                    libxml_clear_errors();
+                    throw new LibXMLException($errors);
+                }
+            }
+
+            switch ($this->nodeType) {
+                case self::ELEMENT :
+                    $elements[] = $this->parseCurrentElement();
+                    break;
+                case self::TEXT :
+                case self::CDATA :
+                    $text .= $this->value;
+                    $this->read();
+                    break;
+                case self::END_ELEMENT :
+                    // Ensuring we are moving the cursor after the end element.
+                    $this->read();
+                    break 2;
+                case self::NONE :
+                    throw new ParseException('We hit the end of the document prematurely. This likely means that some parser "eats" too many elements. Do not attempt to continue parsing.');
+                default :
+                    // Advance to the next element
+                    $this->read();
+                    break;
+            }
+
+        }
+
+        if (!is_null($elementMap)) {
+            $this->popContext();
+        }
+        return ($elements ? $elements : $text);
+
+    }
+
+    /**
+     * Reads all text below the current element, and returns this as a string.
+     *
+     * @return string
+     */
+    function readText() {
+
+        $result = '';
+        $previousDepth = $this->depth;
+
+        while ($this->read() && $this->depth != $previousDepth) {
+            if (in_array($this->nodeType, [XMLReader::TEXT, XMLReader::CDATA, XMLReader::WHITESPACE])) {
+                $result .= $this->value;
+            }
+        }
+        return $result;
+
+    }
+
+    /**
+     * Parses the current XML element.
+     *
+     * This method returns arn array with 3 properties:
+     *   * name - A clark-notation XML element name.
+     *   * value - The parsed value.
+     *   * attributes - A key-value list of attributes.
+     *
+     * @return array
+     */
+    function parseCurrentElement() {
+
+        $name = $this->getClark();
+
+        $attributes = [];
+
+        if ($this->hasAttributes) {
+            $attributes = $this->parseAttributes();
+        }
+
+        $value = call_user_func(
+            $this->getDeserializerForElementName($name),
+            $this
+        );
+
+        return [
+            'name'       => $name,
+            'value'      => $value,
+            'attributes' => $attributes,
+        ];
+    }
+
+
+    /**
+     * Grabs all the attributes from the current element, and returns them as a
+     * key-value array.
+     *
+     * If the attributes are part of the same namespace, they will simply be
+     * short keys. If they are defined on a different namespace, the attribute
+     * name will be retured in clark-notation.
+     *
+     * @return array
+     */
+    function parseAttributes() {
+
+        $attributes = [];
+
+        while ($this->moveToNextAttribute()) {
+            if ($this->namespaceURI) {
+
+                // Ignoring 'xmlns', it doesn't make any sense.
+                if ($this->namespaceURI === 'http://www.w3.org/2000/xmlns/') {
+                    continue;
+                }
+
+                $name = $this->getClark();
+                $attributes[$name] = $this->value;
+
+            } else {
+                $attributes[$this->localName] = $this->value;
+            }
+        }
+        $this->moveToElement();
+
+        return $attributes;
+
+    }
+
+    /**
+     * Returns the function that should be used to parse the element identified
+     * by it's clark-notation name.
+     *
+     * @param string $name
+     * @return callable
+     */
+    function getDeserializerForElementName($name) {
+
+        if (!array_key_exists($name, $this->elementMap)) {
+            return ['Sabre\\Xml\\Element\\Base', 'xmlDeserialize'];
+        }
+
+        $deserializer = $this->elementMap[$name];
+        if (is_subclass_of($deserializer, 'Sabre\\Xml\\XmlDeserializable')) {
+            return [ $deserializer, 'xmlDeserialize' ];
+        }
+
+        if (is_callable($deserializer)) {
+            return $deserializer;
+        }
+
+        $type = gettype($deserializer);
+        if ($type === 'string') {
+            $type .= ' (' . $deserializer . ')';
+        } elseif ($type === 'object') {
+            $type .= ' (' . get_class($deserializer) . ')';
+        }
+        throw new \LogicException('Could not use this type as a deserializer: ' . $type . ' for element: ' . $name);
+
+    }
+
+}