private function getRecurrenceWindowEnd(PhabricatorCalendarEvent $event, $generate_until)
{
$end_epochs = array();
if ($generate_until) {
$end_epochs[] = $generate_until;
}
$until_epoch = $event->getUntilDateTimeEpoch();
if ($until_epoch) {
$end_epochs[] = $until_epoch;
}
if (!$end_epochs) {
return null;
}
return PhutilCalendarAbsoluteDateTime::newFromEpoch(min($end_epochs));
}
