private function read(StateSender $state, $chat)
 {
     $chat->messages()->whereNull('viewed_at')->where('user_id', '!=', $this->user->id)->get()->each(function ($message) {
         if (!$message->delivered_at) {
             $message->delivered_at = Carbon::now();
         }
         if (!$message->viewed_at) {
             $message->viewed_at = Carbon::now();
         }
         $message->viewed_at = Carbon::now();
         $message->save();
     });
     if ($chat->isOwner($this->user->id)) {
         $state->setCarChatAsRead($chat->id, $this->user->id);
     } else {
         $state->setCarChatAsRead($chat->id, null, $chat->receiver_car_id);
     }
 }