--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/sabre/vobject/lib/Splitter/ICalendar.php	Sat Jan 13 09:06:10 2018 -0500
@@ -0,0 +1,116 @@
+<?php
+
+namespace Sabre\VObject\Splitter;
+
+use
+    Sabre\VObject,
+    Sabre\VObject\Component\VCalendar;
+
+/**
+ * Splitter
+ *
+ * This class is responsible for splitting up iCalendar objects.
+ *
+ * This class expects a single VCALENDAR object with one or more
+ * calendar-objects inside. Objects with identical UID's will be combined into
+ * a single object.
+ *
+ * @copyright Copyright (C) 2011-2015 fruux GmbH (https://fruux.com/).
+ * @author Dominik Tobschall
+ * @author Armin Hackmann
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class ICalendar implements SplitterInterface {
+
+    /**
+     * Timezones
+     *
+     * @var array
+     */
+    protected $vtimezones = array();
+
+    /**
+     * iCalendar objects
+     *
+     * @var array
+     */
+    protected $objects = array();
+
+    /**
+     * Constructor
+     *
+     * The splitter should receive an readable file stream as it's input.
+     *
+     * @param resource $input
+     * @param int $options Parser options, see the OPTIONS constants.
+     */
+    public function __construct($input, $options = 0) {
+
+        $data = VObject\Reader::read($input, $options);
+        $vtimezones = array();
+        $components = array();
+
+        if (!$data instanceof VObject\Component\VCalendar) {
+            throw new VObject\ParseException('Supplied input could not be parsed as VCALENDAR.');
+        }
+
+        foreach($data->children() as $component) {
+            if (!$component instanceof VObject\Component) {
+                continue;
+            }
+
+            // Get all timezones
+            if ($component->name === 'VTIMEZONE') {
+                $this->vtimezones[(string)$component->TZID] = $component;
+                continue;
+            }
+
+            // Get component UID for recurring Events search
+            if(!$component->UID) {
+                $component->UID = sha1(microtime()) . '-vobjectimport';
+            }
+            $uid = (string)$component->UID;
+
+            // Take care of recurring events
+            if (!array_key_exists($uid, $this->objects)) {
+                $this->objects[$uid] = new VCalendar();
+            }
+
+            $this->objects[$uid]->add(clone $component);
+        }
+
+    }
+
+    /**
+     * Every time getNext() is called, a new object will be parsed, until we
+     * hit the end of the stream.
+     *
+     * When the end is reached, null will be returned.
+     *
+     * @return Sabre\VObject\Component|null
+     */
+    public function getNext() {
+
+        if($object=array_shift($this->objects)) {
+
+            // create our baseobject
+            $object->version = '2.0';
+            $object->prodid = '-//Sabre//Sabre VObject ' . VObject\Version::VERSION . '//EN';
+            $object->calscale = 'GREGORIAN';
+
+            // add vtimezone information to obj (if we have it)
+            foreach ($this->vtimezones as $vtimezone) {
+                $object->add($vtimezone);
+            }
+
+            return $object;
+
+        } else {
+
+            return null;
+
+        }
+
+    }
+
+}