static function fetchChannel($user_id, $action, $arg1, $arg2) { $channel = new Realtime_channel(); if (is_null($user_id)) { $channel->whereAdd('user_id is null'); } else { $channel->user_id = $user_id; } $channel->action = $action; if (is_null($arg1)) { $channel->whereAdd('arg1 is null'); } else { $channel->arg1 = $arg1; } if (is_null($arg2)) { $channel->whereAdd('arg2 is null'); } else { $channel->arg2 = $arg2; } if ($channel->find(true)) { $channel->increment(); return $channel; } else { return null; } }