public function postRefresh(Request $request)
 {
     // check user auth and if has permission in chat room
     // If it is looking for new messages or old messages
     $new = $request->input('new');
     // Get the latest post of the user
     $current_post_id = Chat::where('key', $request->input('msg_key'))->first()->id;
     // Get ID of that latest post from server
     $latest_post_id = Chat::orderBy('id', 'desc')->first()->id;
     // Preparation of response messages
     $response_posts = [];
     // Loop to fill the response array with proper data, to not include it all
     if ($latest_post_id > $current_post_id) {
         $latest_posts = Chat::where('id', '>', $current_post_id)->get();
         foreach ($latest_posts as $post) {
             $response_posts[$post->id] = ['body' => $post->body, 'key' => $post->key, 'human_date' => $post->created_at->diffForHumans(), 'user' => ['name' => $post->user->username, 'avatar' => $post->user->getAvatar()]];
         }
     }
     $json = ['data' => $response_posts];
     return response()->json(json_encode($json));
     // posts in JSON, that is then coded by JS
 }
 public function index()
 {
     $chat = Chat::orderBy('created_at', 'asc')->get();
     return view('home')->with('chat', $chat);
 }