public async Task <Cart> CalculateCartAsync(
TaxType taxType, ICatalogGateway catalogGateway,
IPromoGateway promoGateway, IShippingGateway shippingGateway)
{
if (CartItems != null && CartItems?.Count() > 0)
{
CartItemTotal = 0.0D;
foreach (var cartItem in CartItems)
{
var product = await catalogGateway.GetProductByIdAsync(cartItem.Product.ProductId);
if (product == null)
{
throw new Exception("Could not find product.");
}
cartItem
.FillUpProductInfo(product.Name, product.Price, product.Desc)
.ChangePrice(product.Price);
CartItemPromoSavings = CartItemPromoSavings + cartItem.PromoSavings * cartItem.Quantity;
CartItemTotal = CartItemTotal + cartItem.Product.Price * cartItem.Quantity;
}
shippingGateway.CalculateShipping(this);
}
promoGateway.ApplyShippingPromotions(this);
switch (taxType)
{
case TaxType.NoTax:
CartTotal = CartItemTotal + ShippingTotal;
break;
case TaxType.TenPercentage:
var cartTotal = CartItemTotal + ShippingTotal;
CartTotal = cartTotal * 10 / 100 + cartTotal;
break;
default:
throw new ArgumentOutOfRangeException(nameof(taxType), taxType, null);
}
return(this);
}
public ActionResult AddToCart(int albumId)
{
CartItem inCartItem = CartItems.FirstOrDefault(item => item.Album.Id == albumId);
if (inCartItem != null)
{
inCartItem.Amount = ++inCartItem.Amount;
}
else
{
var item = new CartItem
{
Id = CartItems.Count() > 0?CartItems.Last().Id + 1:1,
Album = db.Albums.Find(albumId),
Amount = 1
};
CartItems.Add(item);
}
return(RedirectToAction("Index"));
}