public function insertBookingAppointment($a_insertedId, $a_booking_values, $a_from = NULL, $a_to = NULL)
{
//create appointment first
if ($a_from == NULL || $a_to == NULL) {
$a_from = $a_booking_values['from']['date'] . " " . $a_booking_values['from']['time'];
$a_to = $a_booking_values['to']['date'] . " " . $a_booking_values['to']['time'];
}
$time_start = new ilDateTime($a_from, 1);
$time_end = new ilDateTime($a_to, 1);
$title = $a_booking_values['subject'];
$room_name = $this->ilRoomSharingDatabase->getRoomName($a_booking_values['room']);
$cal_cat_id = $a_booking_values['cal_id'];
//use original ilCalendarEntry and let ILIAS do the work
$app = new ilCalendarEntry();
$app->setStart($time_start);
$app->setEnd($time_end);
$app->setFullday(false);
$app->setTitle($title);
$app->setDescription($a_booking_values['comment']);
$app->setAutoGenerated(true);
$app->enableNotification(false);
$app->setLocation($room_name);
$app->validate();
$app->save();
$ass = new ilCalendarCategoryAssignments($app->getEntryId());
$ass->addAssignment($cal_cat_id);
//update bookings-table afterwards
$this->ilDB->manipulate('UPDATE ' . dbc::BOOKINGS_TABLE . ' SET calendar_entry_id = ' . $this->ilDB->quote($app->getEntryId(), 'integer') . ' WHERE id = ' . $this->ilDB->quote($a_insertedId, 'integer') . ' AND pool_id =' . $this->ilDB->quote($this->pool_id, 'integer'));
}