From 9dd7ca26671d2c6640210e59071135e8f69cca7f Mon Sep 17 00:00:00 2001
From: Georg Ehrke <dev@georgswebsite.de>
Date: Thu, 28 Jun 2012 18:54:13 +0200
Subject: [PATCH] some changes and more doc for OC_Calendar_Export class

---
 apps/calendar/lib/export.php | 74 +++++++++++++++++++++++++++---------
 1 file changed, 55 insertions(+), 19 deletions(-)

diff --git a/apps/calendar/lib/export.php b/apps/calendar/lib/export.php
index 7c98d94fcc..cd248ce92a 100644
--- a/apps/calendar/lib/export.php
+++ b/apps/calendar/lib/export.php
@@ -6,9 +6,12 @@
  * See the COPYING-README file.
  */
 /*
- * This class does export
+ * 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';
 
@@ -20,38 +23,71 @@ class OC_Calendar_Export{
 	 */
 	public static function export($id, $type){
 		if($type == self::EVENT){
-			$data = OC_Calendar_App::getEventObject($_GET['eventid'], false);
-			$return = $data['calendardata'];
+			$return = self::event($id);
 		}else{
 			$return = self::calendar($id);
 		}
-		return $return;
+		return self::fixLineBreaks($return);
 	}
 
 	/*
-	 * @brief export a calendar and convert all times to UTC
+	 * @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);
-		$return = "BEGIN:VCALENDAR\nVERSION:2.0\nPRODID:ownCloud Calendar\n";
+		$return = "BEGIN:VCALENDAR\nVERSION:2.0\nPRODID:ownCloud Calendar " . OCP\App::getAppVersion('calendar') . "\n";
 		foreach($events as $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){
-				$object->VEVENT->DTSTART->offsetUnset('VALUE');
-				$object->VEVENT->DTEND->offsetUnset('VALUE');
-			}
-			$return .= $object->VEVENT->serialize();
+			$return .= self::generateEvent($event);
 		}
 		$return .= "END:VCALENDAR";
-		$return = str_replace("\r\n", "\n", $return);
-		$return = str_replace("\r", "\n", $return);
-		$return = str_replace("\n", "\r\n", $return);
 		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') . "\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;
+	}
 }