public void AddShoppingItem(
ShoppingCar shoppingCart,
string productId,
int count)
{
if (shoppingCart == null)
{
throw new ArgumentNullException();
}
var product = _productRepositorie.GetProductById(productId);
if (product.ProductCount < count)
{
throw new InvalidOperationException($"Product {product.ProductId} count is not enough.");
}
var shoppingItem = shoppingCart.ItemListInCar
.FirstOrDefault(x => x.ProductId.Equals(productId));
if (shoppingItem == null)
{
shoppingItem = new ShoppingItem
{
ProductId = productId,
ProductName = product.ProductName,
ItemPrice = product.ProductPrice,
ItemCount = count
};
shoppingCart.ItemListInCar.Add(shoppingItem);
}
else
{
shoppingItem.ItemCount += count;
}
_productRepositorie.RemoveProduct(productId, count);
}
public int RemoveProductById(string id, int count)
{
_productRepositorie.RemoveProduct(id, count);
return(0);
}
public Product RemoveProductById(int id, int count = 1)
{
_productRepositories.RemoveProduct(id, count);
return(_productRepositories.GetProductById(id));
}