public function addOffer(AddOffer $request)
    {
        $blocked = 0;
        $visible_for = 'all';

        $order = Order::where('id', $request->order_id)->with('offers')->first();

        if (Gate::denies('add', [Offer::class, $order])) {
            return redirect()->back();
        }

        if (Message::hasInvalidValue($request->message)) {
            $blocked = 1;
            $visible_for = 'executor';
        }

        $offer = Offer::create([
            'executor_id' => Auth()->id(),
            'customer_cost' => $request->cost * Auth::user()->x_cost,
            'executor_cost' => $request->cost,
            'order_id' => $request->order_id,
            'blocked' => $blocked,
            'blocked_messages' => $blocked
        ]);

        $message = Message::create([
            'offer_id' => $offer->id,
            'message' => $request->message,
            'author_id' => Auth()->id(),
            'is_read' => 'no',
            'visible_for' => $visible_for,
            'blocked' => $blocked
        ]);

        OrderHistory::create([
            'order_id' => $request->order_id,
            'user_id' => Auth::user()->id,
            'status' => 'offer_added',
            'customer_cost' => $request->cost * Auth::user()->x_cost,
            'executor_cost' => $request->cost,
            'visible_for' => $visible_for
        ]);

        if (!$blocked) {
            broadcast(new OfferChange($offer->id, $message))->toOthers();
            $notification = Notification::create([
                'type' => 'offer_added',
                'executor_id' => Auth::id(),
                'order_id' => $request->order_id,
                'customer_id' => $order->customer_id,
                'customer_cost' => $request->cost * Auth::user()->x_cost,
                'executor_cost' => $request->cost,
                'visible_for' => 'customer',
                'message_id' => $message->id
            ]);

            broadcast(new NewNotification($order->customer_id, $notification->id))->toOthers();
        } else {
            broadcast(new ValidateMessage($offer->id, $message))->toOthers();
        }

        return redirect()->back();
    }