public function getLast($userId)
{
$sql = 'SELECT MAX(int_date) as mx FROM ' . '*PREFIX*ocsms_conversation_read_states WHERE user_id = ?';
$query = \OCP\DB::prepare($sql);
$result = $query->execute(array($userId));
if ($row = $result->fetchRow()) {
return $row["mx"];
}
return 0;
}