/// <summary>
/// Adds and processes a promo code
/// </summary>
/// <param name="promoCode"></param>
public void AddPromoCode(PromoCode promoCode)
{
// check constraints
if (PromoCodes.Exists(p => p.Code == promoCode.Code))
{
throw new Exception("Cannot enter same promo code twice!");
}
if (promoCode.SpecialPriceItem != null && !Order.OrderDetails.Exists(o => o.ProductId == promoCode.SpecialPriceItem.Id))
{
throw new Exception("Must purchase special item to receive discount: " + promoCode.SpecialPriceItem.Name);
}
if (promoCode.WithPurchaseOf != null && !Order.OrderDetails.Exists(o => o.ProductId == promoCode.WithPurchaseOf.Id))
{
throw new Exception("Must purchase qualifying item: " + promoCode.WithPurchaseOf.Name);
}
if (promoCode.MinimumQualifyingPurchase != null && TotalExtendedPrice < promoCode.MinimumQualifyingPurchase)
{
throw new Exception("Must have a minimum purchase of $" + promoCode.MinimumQualifyingPurchase.ToString());
}
if (promoCode.CodeStart != null && DateTime.Now < promoCode.CodeStart)
{
DateTime codeStart = (DateTime)promoCode.CodeStart;
throw new Exception("Code is not valid until " + codeStart.ToShortDateString());
}
if (promoCode.CodeEnd != null && DateTime.Now > promoCode.CodeEnd)
{
throw new Exception("Code is expired!");
}
// Apply promotions
if (promoCode.PromotionalItem != null)
{
Order.OrderDetails.Add(new OrderDetail()
{
Product = promoCode.PromotionalItem,
UnitPrice = promoCode.PromotionalItemPrice ?? 0,
Quantity = 1,
IsPromotionalItem = true,
PlacedInCart = DateTime.Now,
Shipping = 0
});
}
// special price may be zero; only apply if a percentage is not given
if ((promoCode.PercentOffItem == null || promoCode.PercentOffItem == 0) && promoCode.SpecialPriceItem != null)
{
OrderDetail item = Order.OrderDetails.Find(o => o.Product.Id == promoCode.SpecialPriceItem.Id);
item.UnitPrice = promoCode.SpecialPrice ?? 0;
}
// percent off item
if (promoCode.PercentOffItem != null && promoCode.PercentOffItem > 0 && promoCode.SpecialPriceItem != null)
{
OrderDetail item = Order.OrderDetails.Find(o => o.Product.Id == promoCode.SpecialPriceItem.Id);
item.UnitPrice = PercentOff(item.UnitPrice, promoCode.PercentOffItem ?? 0);
}
// percent off order
if (promoCode.PercentOffOrder != null && promoCode.PercentOffOrder > 0)
{
for (int i = 0; i < Order.OrderDetails.Count; i++)
{
OrderDetail item = Order.OrderDetails[i];
item.UnitPrice = PercentOff(item.UnitPrice, promoCode.PercentOffOrder ?? 0);
}
}
// Add promocode to list
PromoCodes.Add(promoCode);
}
/// <summary>
/// Removes shipping charges from an item in the shopping cart
/// </summary>
/// <param name="orderDetail"></param>
public void RemoveShippingCharges(OrderDetail orderDetail)
{
orderDetail.Shipping = 0;
}
