function update_caldav_data($old_data, $dav_id)
{
$vResource = new vComponent($old_data);
//$expanded = expand_event_instances($vResource, $expand_range_start, $expand_range_end);
$event = $vResource->GetComponents("VEVENT")[0];
$attendeeName = "ATTENDEE";
$vResource->ClearProperties($attendeeName);
$davIdArray = array(':dav_id' => $dav_id);
$attendeeQry = new AwlQuery("SELECT params, attendee FROM calendar_attendee WHERE dav_id = :dav_id", $davIdArray);
$attendeeQry->Execute();
while ($arow = $attendeeQry->Fetch()) {
$attendeeParameters = $arow->params;
$attendeeValue = $arow->attendee;
// separe value
$event->AddProperty($attendeeName, $attendeeValue, $attendeeParameters);
}
$rendered = $vResource->Render();
$sql = 'UPDATE caldav_data SET caldav_data=:dav_data, dav_etag=:etag WHERE dav_id=:dav_id';
$davIdArray[':etag'] = md5($rendered);
$davIdArray[':dav_data'] = $rendered;
$query = new AwlQuery($sql, $davIdArray);
$query->Execute();
}
