public CartViewModel AddToCart(CartViewModel cartModel, AddToCartViewModel addToCartModel)
{
var cartProduct = cartModel.Products.SingleOrDefault(p => p.ProductId == addToCartModel.ProductId);
var product = _productWebService.GetProductById(addToCartModel.ProductId);
bool productQuantityUpdated = false;
if (!_productWebService.ProductQuantityIsOk(addToCartModel.ProductId, addToCartModel.SizeId))
{
return(null);
}
else
{
productQuantityUpdated = _productWebService.ReduceProductQuantity(addToCartModel.ProductId, addToCartModel.SizeId, 1);
}
if (!productQuantityUpdated)
{
return(null);
}
if (cartProduct == null)
{
//product not found in cart, add new
cartModel.Products.Add(new ProductItemViewModel()
{
ProductId = addToCartModel.ProductId,
Brand = product.Brand.BrandName,
Quantity = 1,
Size = product.Sizes.SingleOrDefault(p => p.Id == addToCartModel.SizeId).Size,
Price = product.Price
});
}
else
{
var size = product.Sizes.SingleOrDefault(p => p.Id == addToCartModel.SizeId);
if (size == null)
{
//product found but size not found, add new
cartModel.Products.Add(new ProductItemViewModel()
{
ProductId = addToCartModel.ProductId,
Brand = product.Brand.BrandName,
Quantity = 1,
Size = product.Sizes.SingleOrDefault(p => p.Id == addToCartModel.SizeId).Size,
Price = product.Price
});
}
else if (addToCartModel.SizeId == size.Id)
{
cartProduct.Quantity++;
}
}
return(cartModel);
}