public void ChangeProductQuantity(ProductId productId, int quantity)
{
var validator = new ProductInInventoryValidator().And(new CartItemInCartValidator(Items));
var result = validator.Validate(new CartItem(productId, quantity));
if (!result.IsValid)
{
throw new CartException(result.Errors.First().ErrorMessage);
}
RaiseEvent(new ProductQuantityChangedEvent(productId, GetCartItemByProduct(productId).Quantity, quantity));
}
public void AddProduct(CartItem cartItem)
{
var validator = new ProductInInventoryValidator().And(new CartItemNotInCartValidator(Items));
var result = validator.Validate(cartItem);
if (!result.IsValid)
{
throw new CartException(result.Errors.First().ErrorMessage);
}
RaiseEvent(new ProductAddedEvent(cartItem.ProductId, cartItem.Quantity));
}