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<?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;
}
}
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