--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/sabre/vobject/lib/Document.php	Sat Jan 13 09:06:10 2018 -0500
@@ -0,0 +1,261 @@
+<?php
+
+namespace Sabre\VObject;
+
+/**
+ * Document
+ *
+ * A document is just like a component, except that it's also the top level
+ * element.
+ *
+ * Both a VCALENDAR and a VCARD are considered documents.
+ *
+ * This class also provides a registry for document types.
+ *
+ * @copyright Copyright (C) 2011-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+abstract class Document extends Component {
+
+    /**
+     * Unknown document type
+     */
+    const UNKNOWN = 1;
+
+    /**
+     * vCalendar 1.0
+     */
+    const VCALENDAR10 = 2;
+
+    /**
+     * iCalendar 2.0
+     */
+    const ICALENDAR20 = 3;
+
+    /**
+     * vCard 2.1
+     */
+    const VCARD21 = 4;
+
+    /**
+     * vCard 3.0
+     */
+    const VCARD30 = 5;
+
+    /**
+     * vCard 4.0
+     */
+    const VCARD40 = 6;
+
+    /**
+     * The default name for this component.
+     *
+     * This should be 'VCALENDAR' or 'VCARD'.
+     *
+     * @var string
+     */
+    static public $defaultName;
+
+    /**
+     * List of properties, and which classes they map to.
+     *
+     * @var array
+     */
+    static public $propertyMap = array();
+
+    /**
+     * List of components, along with which classes they map to.
+     *
+     * @var array
+     */
+    static public $componentMap = array();
+
+    /**
+     * List of value-types, and which classes they map to.
+     *
+     * @var array
+     */
+    static public $valueMap = array();
+
+    /**
+     * Creates a new document.
+     *
+     * We're changing the default behavior slightly here. First, we don't want
+     * to have to specify a name (we already know it), and we want to allow
+     * children to be specified in the first argument.
+     *
+     * But, the default behavior also works.
+     *
+     * So the two sigs:
+     *
+     * new Document(array $children = array(), $defaults = true);
+     * new Document(string $name, array $children = array(), $defaults = true)
+     *
+     * @return void
+     */
+    public function __construct() {
+
+        $args = func_get_args();
+        if (count($args)===0 || is_array($args[0])) {
+            array_unshift($args, $this, static::$defaultName);
+            call_user_func_array(array('parent', '__construct'), $args);
+        } else {
+            array_unshift($args, $this);
+            call_user_func_array(array('parent', '__construct'), $args);
+        }
+
+    }
+
+    /**
+     * Returns the current document type.
+     *
+     * @return void
+     */
+    public function getDocumentType() {
+
+        return self::UNKNOWN;
+
+    }
+
+    /**
+     * Creates a new component or property.
+     *
+     * If it's a known component, we will automatically call createComponent.
+     * otherwise, we'll assume it's a property and call createProperty instead.
+     *
+     * @param string $name
+     * @param string $arg1,... Unlimited number of args
+     * @return mixed
+     */
+    public function create($name) {
+
+        if (isset(static::$componentMap[strtoupper($name)])) {
+
+            return call_user_func_array(array($this,'createComponent'), func_get_args());
+
+        } else {
+
+            return call_user_func_array(array($this,'createProperty'), func_get_args());
+
+        }
+
+    }
+
+    /**
+     * Creates a new component
+     *
+     * This method automatically searches for the correct component class, based
+     * on its name.
+     *
+     * You can specify the children either in key=>value syntax, in which case
+     * properties will automatically be created, or you can just pass a list of
+     * Component and Property object.
+     *
+     * By default, a set of sensible values will be added to the component. For
+     * an iCalendar object, this may be something like CALSCALE:GREGORIAN. To
+     * ensure that this does not happen, set $defaults to false.
+     *
+     * @param string $name
+     * @param array $children
+     * @param bool $defaults
+     * @return Component
+     */
+    public function createComponent($name, array $children = null, $defaults = true) {
+
+        $name = strtoupper($name);
+        $class = 'Sabre\\VObject\\Component';
+
+        if (isset(static::$componentMap[$name])) {
+            $class=static::$componentMap[$name];
+        }
+        if (is_null($children)) $children = array();
+        return new $class($this, $name, $children, $defaults);
+
+    }
+
+    /**
+     * Factory method for creating new properties
+     *
+     * This method automatically searches for the correct property class, based
+     * on its name.
+     *
+     * You can specify the parameters either in key=>value syntax, in which case
+     * parameters will automatically be created, or you can just pass a list of
+     * Parameter objects.
+     *
+     * @param string $name
+     * @param mixed $value
+     * @param array $parameters
+     * @param string $valueType Force a specific valuetype, such as URI or TEXT
+     * @return Property
+     */
+    public function createProperty($name, $value = null, array $parameters = null, $valueType = null) {
+
+        // If there's a . in the name, it means it's prefixed by a groupname.
+        if (($i=strpos($name,'.'))!==false) {
+            $group = substr($name, 0, $i);
+            $name = strtoupper(substr($name, $i+1));
+        } else {
+            $name = strtoupper($name);
+            $group = null;
+        }
+
+        $class = null;
+
+        if ($valueType) {
+            // The valueType argument comes first to figure out the correct
+            // class.
+            $class = $this->getClassNameForPropertyValue($valueType);
+        }
+
+        if (is_null($class) && isset($parameters['VALUE'])) {
+            // If a VALUE parameter is supplied, we should use that.
+            $class = $this->getClassNameForPropertyValue($parameters['VALUE']);
+        }
+        if (is_null($class)) {
+            $class = $this->getClassNameForPropertyName($name);
+        }
+        if (is_null($parameters)) $parameters = array();
+
+        return new $class($this, $name, $value, $parameters, $group);
+
+    }
+
+    /**
+     * This method returns a full class-name for a value parameter.
+     *
+     * For instance, DTSTART may have VALUE=DATE. In that case we will look in
+     * our valueMap table and return the appropriate class name.
+     *
+     * This method returns null if we don't have a specialized class.
+     *
+     * @param string $valueParam
+     * @return void
+     */
+    public function getClassNameForPropertyValue($valueParam) {
+
+        $valueParam = strtoupper($valueParam);
+        if (isset(static::$valueMap[$valueParam])) {
+            return static::$valueMap[$valueParam];
+        }
+
+    }
+
+    /**
+     * Returns the default class for a property name.
+     *
+     * @param string $propertyName
+     * @return string
+     */
+    public function getClassNameForPropertyName($propertyName) {
+
+        if (isset(static::$propertyMap[$propertyName])) {
+            return static::$propertyMap[$propertyName];
+        } else {
+            return 'Sabre\\VObject\\Property\\Unknown';
+        }
+
+    }
+
+}