public async Task <PutItemResponse> Handle(
            PutItemRequest request, CancellationToken cancellationToken)
        {
            if (request == null)
            {
                _notificationContext.AddNotification("Request", "Request não pode ser nulo");
                return(null);
            }

            var priceRange = await _priceRangeRepository.GetByIdAsync(request.IdPriceRange);

            if (priceRange == null)
            {
                _notificationContext.AddNotification("PriceRange", "price range não encontrado");
                return(null);
            }

            var item = await _itemRepository.GetByIdAsync(request.IdItem);

            if (item == null)
            {
                _notificationContext.AddNotification("Item", "Item não encontrado");
                return(null);
            }

            item.HasOne(priceRange);

            return(new PutItemResponse(priceRange, item));
        }
        public async Task <CreatePriceResponse> Handle(
            CreatePriceRequest request, CancellationToken cancellationToken)
        {
            if (request == null)
            {
                _notificationContext.AddNotification("Request null", "O request não pode ser nulo");
                return(null);
            }

            var priceRange = await _priceRangeRepository.GetByIdAsync(request.IdPriceRange);

            if (priceRange == null)
            {
                _notificationContext.AddNotification("Price range", "Price range não encontrado");
                return(null);
            }

            var price = new Price(
                request.Start,
                request.End,
                request.Value
                );

            if (price.Invalid)
            {
                _notificationContext.AddNotifications(price.ValidationResult);
                return(null);
            }

            price.HasOne(priceRange);

            await _priceRepository.CreateAsync(price);

            return(new CreatePriceResponse(price.Id, priceRange.Id));
        }