1 files changed, 94 insertions, 0 deletions
diff --git a/apps/calendar/lib/export.php b/apps/calendar/lib/export.php
new file mode 100644
index 00000000000..8f26891f366
--- /dev/null
+++ b/apps/calendar/lib/export.php
@@ -0,0 +1,94 @@
+<?php
+/**
+ * Copyright (c) 2012 Georg Ehrke <ownclouddev@georgswebsite.de>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+/**
+ * This class does export and converts all times to UTC
+ */
+class OC_Calendar_Export{
+	/**
+	 * @brief Use one of these constants as second parameter if you call OC_Calendar_Export::export()
+	 */
+	const CALENDAR = 'calendar';
+	const EVENT = 'event';
+
+	/**
+	 * @brief export a calendar or an event
+	 * @param integer $id id of calendar / event
+	 * @param string $type use OC_Calendar_Export constants
+	 * @return string
+	 */
+	public static function export($id, $type){
+		if($type == self::EVENT){
+			$return = self::event($id);
+		}else{
+			$return = self::calendar($id);
+		}
+		return self::fixLineBreaks($return);
+	}
+
+	/**
+	 * @brief exports a calendar and convert all times to UTC
+	 * @param integer $id id of the calendar
+	 * @return string
+	 */
+	private static function calendar($id){
+		$events = OC_Calendar_Object::all($id);
+		$calendar = OC_Calendar_Calendar::find($id);
+		$return = "BEGIN:VCALENDAR\nVERSION:2.0\nPRODID:ownCloud Calendar " . OCP\App::getAppVersion('calendar') . "\nX-WR-CALNAME:" . $calendar['displayname'] . "\n";
+		foreach($events as $event){
+			$return .= self::generateEvent($event);
+		}
+		$return .= "END:VCALENDAR";
+		return $return;
+	}
+	
+	/**
+	 * @brief exports an event and convert all times to UTC
+	 * @param integer $id id of the event
+	 * @return string
+	 */
+	private static function event($id){
+		$event = OC_Calendar_Object::find($id);
+		$return = "BEGIN:VCALENDAR\nVERSION:2.0\nPRODID:ownCloud Calendar " . OCP\App::getAppVersion('calendar') . "\nX-WR-CALNAME:" . $event['summary'] . "\n";
+		$return .= self::generateEvent($event);
+		$return .= "END:VCALENDAR";
+		return $return;
+	 }
+	 
+	 /**
+	  * @brief generates the VEVENT with UTC dates
+	  * @param array $event
+	  * @return string
+	  */
+	 private static function generateEvent($event){
+		$object = OC_VObject::parse($event['calendardata']);
+		$dtstart = $object->VEVENT->DTSTART;
+		$start_dt = $dtstart->getDateTime();
+		$dtend = OC_Calendar_Object::getDTEndFromVEvent($object->VEVENT);
+		$end_dt = $dtend->getDateTime();
+		if($dtstart->getDateType() !== Sabre_VObject_Element_DateTime::DATE){
+			$start_dt->setTimezone(new DateTimeZone('UTC'));
+			$end_dt->setTimezone(new DateTimeZone('UTC'));
+			$object->VEVENT->setDateTime('DTSTART', $start_dt, Sabre_VObject_Property_DateTime::UTC);
+			$object->VEVENT->setDateTime('DTEND', $end_dt, Sabre_VObject_Property_DateTime::UTC);
+		}
+		return $object->VEVENT->serialize();
+	}
+	
+	/**
+	 * @brief fixes new line breaks
+	 * (fixes problems with Apple iCal)
+	 * @param string $string to fix
+	 * @return string 
+	 */
+	private static function fixLineBreaks($string){
+		$string = str_replace("\r\n", "\n", $string);
+		$string = str_replace("\r", "\n", $string);
+		$string = str_replace("\n", "\r\n", $string);
+		return $string;
+	}
+}