public static function generateIcs($event, $method, $userId, $include_attachments = false) {
include_once('obminclude/of/vcalendar/writer/ICS.php');
include_once('obminclude/of/vcalendar/reader/OBM.php');
$reader = new Vcalendar_Reader_OBM(array('user' => array($userId => 'dummy')), array($event->id));
$document = $reader->getDocument($method, $include_attachments);
$writer = new Vcalendar_Writer_ICS();
$writer->writeDocument($document);
$tmpFilename = secure_tmpname('.ics','ics_');
$res = fopen($tmpFilename, 'w');
if (!$res) {
throw new Exception('Unable to open file');
}
fputs($res, $writer->buffer);
fclose($res);
return $tmpFilename;
}
/**
* Perform the export of the calendar to the vCalendar format
*/
private function user_vcalendar_export($user_id)
{
$date = new Of_date();
$start = clone $date;
$start = $start->subYear(100);
$end = clone $date;
$end->addYear(100);
$calendar_user['user'] = array($user_id => 'dummy');
include_once 'php/calendar/calendar_query.inc';
include_once 'obminclude/of/vcalendar/writer/ICS.php';
include_once 'obminclude/of/vcalendar/reader/OBM.php';
$reader = new Vcalendar_Reader_OBM($calendar_user, NULL, $start, $end);
$document = $reader->getDocument();
$writer = new Vcalendar_Writer_ICS();
$writer->writeDocument($document);
$document->destroy();
return $writer->buffer;
}