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sources/apps/calendar/lib/export.php
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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
VERSION:2.0
PRODID:ownCloud Calendar " . OCP\App::getAppVersion('calendar') . "
X-WR-CALNAME:" . $calendar['displayname'] . "
";
foreach($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
VERSION:2.0
PRODID:ownCloud Calendar " . OCP\App::getAppVersion('calendar') . "
X-WR-CALNAME:" . $event['summary'] . "
";
$return .= self::generateEvent($event);
$return .= "END:VCALENDAR";
return $return;
}
/**
* @brief generates the VEVENT/VTODO/VJOURNAL with UTC dates
* @param array $event
* @return string
*/
private static function generateEvent($event) {
$object = OC_VObject::parse($event['calendardata']);
if(!$object){
return false;
}
$sharedAccessClassPermissions = OC_Calendar_Object::getAccessClassPermissions($object);
if(OC_Calendar_Object::getowner($event['id']) !== OCP\User::getUser()){
if (!($sharedAccessClassPermissions & OCP\PERMISSION_READ)) {
return '';
}
}
$object = OC_Calendar_Object::cleanByAccessClass($event['id'], $object);
if($object->VEVENT){
$dtstart = $object->VEVENT->DTSTART;
$start_dt = $dtstart->getDateTime();
$dtend = OC_Calendar_Object::getDTEndFromVEvent($object->VEVENT);
$end_dt = $dtend->getDateTime();
if($dtstart->getDateType() !== Sabre\VObject\Property\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 $object->VEVENT->serialize();
}
if($object->VTODO){
return $object->VTODO->serialize();
}
if($object->VJOURNAL){
return $object->VJOURNAL->serialize();
}
return '';
}
/**
* @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
", "
", $string);
$string = str_replace("\r", "
", $string);
$string = str_replace("
", "\r
", $string);
return $string;
}
}
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