public Cart Execute(Cart cart)
{
if (cart == null)
{
throw new Exception("Cart is null.");
}
if (cart.CartItems != null && cart.CartItems?.Count() > 0)
{
cart.CartItemTotal = 0;
foreach (CartItem item in cart.CartItems)
{
cart.CartItemPromoSavings = cart.CartItemPromoSavings + (item.PromoSavings * item.Quantity);
cart.CartItemTotal = cart.CartItemTotal + (item.Product.Price * item.Quantity);
}
cart = _shippingService.CalculateShipping(cart);
}
cart = _promoService.ApplyShippingPromotions(cart);
cart.CartTotal = AddTaxCost(cart.CartItemTotal + cart.ShippingTotal);
return(cart);
}
