scrum-poker-internal/app/Services/Rooms/FavoriteRoomService.php

<?php

namespace App\Services\Rooms;

use App\Models\Room;
use App\Models\User;
use Symfony\Component\HttpKernel\Exception\ConflictHttpException;

class FavoriteRoomService
{
    public function toggle(User $user, Room $room): void
    {
        if ($room->owner_id === $user->id) {
            throw new ConflictHttpException('Lobby is already yours', null, 409);
        }

        $user->favoriteRooms()->toggle([$room->id]);
    }
}