public void _3_PercentDiscount_Categories()
{
//15 percent off Female-Winter-Collection
var exp =
"Category=1001;PriceType=R;PercentDiscount=0.15";
var promoExp = PromotionLineItemExpression.Parse(exp);
var promo = new PromotionLineItem {
PromotionLineItemExpression = exp
};
var cartlineItems = new List <Cart>()
{
new Cart()
{
Categories = new List <string>()
{
"1001"
}, OriginalPrice = 40m, DiscountAmount = 0m, Quantity = 2, DiscountApplied = false, PriceType = "R"
},
new Cart()
{
Categories = new List <string>()
{
"1003", "1004"
}.ToList(), OriginalPrice = 20m, DiscountAmount = 0m, Quantity = 1, DiscountApplied = false, PriceType = "R"
}
};
new CartProcessor().ApplyEach(promo, cartlineItems);
Assert.AreEqual(88m, cartlineItems.Sum(c => c.Sum));
//Assert.AreEqual(CartContext.Products.Single(p => p.Code == "1001").Price,
// cartProcessor.Process(promotion.PromotionLineItems, cartLineItems).FirstOrDefault().DiscountedPrice);
}
public void _2_PromoExpression_Parse()
{
var exp =
"Category=1001,1002;PriceType=R,W;ItemCode=1001,1005;FreeShipping=True;BuyItemCategory=1004;BuyItemCount=5;BuyItemCode=1001,1002;GetItemCategory=1003;GetItemCount=2;GetItemCode=1005;PercentDiscount=0.25;AmountDiscount=10";
var promoExp = PromotionLineItemExpression.Parse(exp);
Assert.AreEqual("1001,1002", string.Join(",", promoExp.Category.ToArray()));
Assert.AreEqual("R,W", string.Join(",", promoExp.PriceType.ToArray()));
Assert.AreEqual("1001,1005", string.Join(",", promoExp.ItemCode.ToArray()));
Assert.AreEqual(true, promoExp.FreeShipping);
Assert.AreEqual("1004", string.Join(",", promoExp.BuyItemCategory.ToArray()));
Assert.AreEqual(5, promoExp.BuyItemCount);
Assert.AreEqual("1003", string.Join(",", promoExp.GetItemCategory.ToArray()));
Assert.AreEqual(2, promoExp.GetItemCount);
Assert.AreEqual("1005", string.Join(",", promoExp.GetItemCode.ToArray()));
Assert.AreEqual("1001,1002", string.Join(",", promoExp.BuyItemCode.ToArray()));
Assert.AreEqual(.25m, promoExp.PercentDiscount);
Assert.AreEqual(10m, promoExp.AmountDiscount);
}
public void ApplyEach(PromotionLineItem promo, List <Cart> carts)
{
var tempLineItems = new List <Cart>();
foreach (var lineItem in carts)
{
var promoExp = PromotionLineItemExpression.Parse(promo.PromotionLineItemExpression);
lineItem.DiscountApplied = false;
if (promoExp.Category.Count > 0 && !lineItem.DiscountApplied &&
promoExp.PriceType.Contains(lineItem.PriceType))
{
var qualifiedCategories = promoExp.Category.Intersect(lineItem.Categories);
if (qualifiedCategories.Count() > 0)
{
lineItem.DiscountAmount = promoExp.AmountDiscount +
(lineItem.OriginalPrice * promoExp.PercentDiscount);
//lineItem.DiscountedPrice = lineItem.OriginalPrice - lineItem.DiscountAmount;
}
lineItem.DiscountApplied = true;
}
if (promoExp.ItemCode.Count > 0 && !lineItem.DiscountApplied &&
promoExp.PriceType.Contains(lineItem.PriceType))
{
var qualified = promoExp.ItemCode.Contains(lineItem.Product.Code);
if (qualified)
{
lineItem.DiscountAmount = promoExp.AmountDiscount +
(lineItem.OriginalPrice * promoExp.PercentDiscount);
//lineItem.DiscountedPrice = lineItem.OriginalPrice - lineItem.DiscountAmount;
}
lineItem.DiscountApplied = true;
}
if (promoExp.BuyItemCode.Count > 0 && !lineItem.DiscountApplied &&
promoExp.PriceType.Contains(lineItem.PriceType))
{
var qualified = promoExp.BuyItemCode.Contains(lineItem.Product.Code) && lineItem.Quantity >= promoExp.BuyItemCount;
if (qualified)
{
//how many free items ?
var freeItemCount = lineItem.Quantity / promoExp.BuyItemCount;
//slow !!!!!!!!!!!!!!!
using (var context = new ShoppingCartContext())
{
var product = context.Products.Single(p => p.Code == promoExp.GetItemCode.FirstOrDefault()); //only support single get product
for (int i = 0; i < freeItemCount; i++)
{
tempLineItems.Add(new Cart()
{
OriginalPrice = context.ProductOffers.ToList().Single(po => po.ProductId == product.Id && po.PriceTypeId == 1).Price,
DiscountAmount = context.ProductOffers.ToList().Single(po => po.ProductId == product.Id && po.PriceTypeId == 1).Price,
ShippingCost = lineItem.ShippingCost,
//DiscountedPrice = 0m,
DiscountApplied = true,
AddOnItem = true,
Quantity = promoExp.GetItemCount,
Code = Guid.NewGuid().ToString(),
Categories = lineItem.Categories,
DateCreated = lineItem.DateCreated,
PriceType = lineItem.PriceType,
Product = product
//ProductCode = product.Code
});
}
}
}
}
//if the cart line item applies for this promo
//if (promo.ProductOffers.Any(po => po.Code == lineItem.ProductOffer.Code) && lineItem.ProductOffer.Discountable && promo.Quantity >= lineItem.Quantity)
//{
// if (promo.FreeShipping)
// lineItem.ShippingCost = 0m;
// lineItem.DiscountAmount = (lineItem.OriginalPrice * (1 - promo.PercentDiscount)) - promo.AmountDiscount;
// lineItem.DiscountedPrice = lineItem.OriginalPrice - lineItem.DiscountAmount + lineItem.ShippingCost;
//}
}
carts.AddRange(tempLineItems);
//return ret;
}
