--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/sabre/vobject/lib/Property/ICalendar/Period.php	Sat Jan 13 09:06:10 2018 -0500
@@ -0,0 +1,129 @@
+<?php
+
+namespace Sabre\VObject\Property\ICalendar;
+
+use
+    Sabre\VObject\Property,
+    Sabre\VObject\Parser\MimeDir,
+    Sabre\VObject\DateTimeParser;
+
+/**
+ * Period property
+ *
+ * This object represents PERIOD values, as defined here:
+ *
+ * http://tools.ietf.org/html/rfc5545#section-3.8.2.6
+ *
+ * @copyright Copyright (C) 2011-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class Period extends Property {
+
+    /**
+     * In case this is a multi-value property. This string will be used as a
+     * delimiter.
+     *
+     * @var string|null
+     */
+    public $delimiter = ',';
+
+    /**
+     * Sets a raw value coming from a mimedir (iCalendar/vCard) file.
+     *
+     * This has been 'unfolded', so only 1 line will be passed. Unescaping is
+     * not yet done, but parameters are not included.
+     *
+     * @param string $val
+     * @return void
+     */
+    public function setRawMimeDirValue($val) {
+
+        $this->setValue(explode($this->delimiter, $val));
+
+    }
+
+    /**
+     * Returns a raw mime-dir representation of the value.
+     *
+     * @return string
+     */
+    public function getRawMimeDirValue() {
+
+        return implode($this->delimiter, $this->getParts());
+
+    }
+
+    /**
+     * Returns the type of value.
+     *
+     * This corresponds to the VALUE= parameter. Every property also has a
+     * 'default' valueType.
+     *
+     * @return string
+     */
+    public function getValueType() {
+
+        return "PERIOD";
+
+    }
+
+    /**
+     * Sets the json value, as it would appear in a jCard or jCal object.
+     *
+     * The value must always be an array.
+     *
+     * @param array $value
+     * @return void
+     */
+    public function setJsonValue(array $value) {
+
+        $value = array_map(
+            function($item) {
+
+                return strtr(implode('/', $item), array(':' => '', '-' => ''));
+
+            },
+            $value
+        );
+        parent::setJsonValue($value);
+
+    }
+
+    /**
+     * Returns the value, in the format it should be encoded for json.
+     *
+     * This method must always return an array.
+     *
+     * @return array
+     */
+    public function getJsonValue() {
+
+        $return = array();
+        foreach($this->getParts() as $item) {
+
+            list($start, $end) = explode('/', $item, 2);
+
+            $start = DateTimeParser::parseDateTime($start);
+
+            // This is a duration value.
+            if ($end[0]==='P') {
+                $return[] = array(
+                    $start->format('Y-m-d\\TH:i:s'),
+                    $end
+                );
+            } else {
+                $end = DateTimeParser::parseDateTime($end);
+                $return[] = array(
+                    $start->format('Y-m-d\\TH:i:s'),
+                    $end->format('Y-m-d\\TH:i:s'),
+                );
+            }
+
+        }
+
+        return $return;
+
+    }
+
+}