public ReturnModel <string> AddToCart(Entity.Domain.Cart.Cart cart, Entity.Domain.Product.Product product, int quantity)
{
var result = new ReturnModel <string>();
try
{
//product accessibility control
if (product == null)
{
result.Data = $"No products to add to the cart were found!";
result.IsSuccess = false;
}
else
{
var productToBeAdded = _productService.Get(product.Id).Data;
var isEnoughStock = quantity <= productToBeAdded.UnitsInStock;
//stock control
if (isEnoughStock)
{
var cartItem = cart.CartItems.FirstOrDefault(c => c.Product.Id == product.Id);
if (cartItem != null) //product has already been added to the card
{
cartItem.Quantity += quantity;
result.Data = $"{quantity} of {product.DisplayName} added to the card!";
}
else //product has never been added to the card
{
cart.CartItems.Add(new CartItem {
Product = product, Quantity = quantity
});
result.Data = $"{quantity} of {product.DisplayName} added to the card!";
}
}
else //the product stock is less than quantity
{
result.Data =
$"Only {productToBeAdded.UnitsInStock} of {product.DisplayName} can be added to the card!";
result.IsSuccess = false;
}
}
}
catch (Exception ex)
{
result.IsSuccess = false;
result.Exception = ex;
result.Message = ex.Message;
}
return(result);
}
public ReturnModel <List <CartItem> > ListCart(Entity.Domain.Cart.Cart cart)
{
var result = new ReturnModel <List <CartItem> >();
try
{
result.Data = cart.CartItems;
}
catch (Exception ex)
{
result.IsSuccess = false;
result.Exception = ex;
result.Message = ex.Message;
}
return(result);
}