public PromoModels.PromofiedCart ApplyPromo(string id)
{
if (string.IsNullOrEmpty(id))
{
throw new Exception("Not a valid cart id");
}
CartModels.Cart cart = GetCart(id);
// assuming that promo code ids are sent in the controller request
var promoCodes = new List <string>();
var promoCollection = new List <PromoModels.Promo>();
foreach (var pc in promoCodes)
{
var promo = _promoRepo.Get(pc);
if (promo != null)
{
promoCollection.Add(promo);
}
}
// process promo code and get total price
PromoModels.PromofiedCart promofiedCart = _promoEngine.Process(promoCollection, cart);
return(promofiedCart);
}
public string AddCart(CartModels.Cart cart)
{
if (cart == null)
{
throw new Exception("Not a valid cart");
}
if (string.IsNullOrEmpty(cart.Id))
{
cart.Id = new Guid().ToString();
}
inMemoryCartList.Add(cart);
return(cart.Id);
}
public void processEnginePromo2()
{
// Arrange
CartModels.Cart cart = new CartModels.Cart
{
Id = "1",
Items = new List <CartModels.Item> {
new CartModels.Item
{
//Id = "1",
//Name = "A",
Category = "Product A",
Price = 100F
},
new CartModels.Item
{
//Id = "1",
//Name = "A",
Category = "Product A",
Price = 200F
},
new CartModels.Item
{
//Id = "1",
//Name = "A",
Category = "Product A",
Price = 130F
},
new CartModels.Item
{
//Id = "1",
//Name = "A",
Category = "Product A",
Price = 50F
}
}
};
List <PromoModels.Promo> promos = new List <PromoModels.Promo>
{
new PromoModels.Promo {
Id = "promo1",
Buys = new List <PromoModels.Buy>
{
new PromoModels.Buy
{
Category = "Product A",
Count = 2
}
},
Description = "buy 2 and get 1 free",
Gets = new List <PromoModels.Get>
{
new PromoModels.Get
{
Category = "Product A",
//All = false,
Count = 1,
Off = new PromoModels.Off
{
//Fixed = new PromoModels.Fixed{ Price = 0F },
Discount = new PromoModels.Discount {
Percentage = 100F
}
}
}
}
}
};
// Act
var promoFied = promoEngine.Process(promos, cart);
// Assert
Assert.AreEqual(promoFied.TotalPrice, 480F);
Assert.AreEqual(promoFied.TotalOffPrice, 350F);
}
public void processEnginePromo1()
{
// Arrange
CartModels.Cart cart = new CartModels.Cart
{
Id = "1",
Items = new List <CartModels.Item> {
new CartModels.Item
{
Id = "1",
Name = "A",
Category = "Product A",
Price = 50F
},
new CartModels.Item
{
Id = "1",
Name = "A",
Category = "Product A",
Price = 50F
},
new CartModels.Item
{
Id = "1",
Name = "A",
Category = "Product A",
Price = 50F
}
}
};
List <PromoModels.Promo> promos = new List <PromoModels.Promo>
{
new PromoModels.Promo {
Id = "promo1",
Buys = new List <PromoModels.Buy>
{
new PromoModels.Buy
{
Category = "Product A",
Count = 2
}
},
Description = "3 of A's for 130", // same as Buy 2 A's and get third for 30
Gets = new List <PromoModels.Get>
{
new PromoModels.Get
{
Category = "Product A",
All = true,
Count = 0,
Off = new PromoModels.Off
{
Fixed = new PromoModels.Fixed {
Price = 30F
}
}
}
}
}
};
// Act
var promoFied = promoEngine.Process(promos, cart);
// Assert
Assert.AreEqual(promoFied.TotalPrice, 150F);
Assert.AreEqual(promoFied.TotalOffPrice, 130F);
}
// Implement the calculation process for promo engine
PromoModels.PromofiedCart IPromoEngine.Process(List <PromoModels.Promo> promos, CartModels.Cart cart)
{
var groupedItems = new Dictionary <string, List <PromoModels.MarkedItem> >();
foreach (var item in cart.Items)
{
if (!groupedItems.ContainsKey(item.Category))
{
groupedItems.Add(item.Category, new List <PromoModels.MarkedItem> {
new PromoModels.MarkedItem {
Item = item, MarkedBuys = new Dictionary <string, bool>(), MarkedGets = new Dictionary <string, float>()
}
});
}
else
{
groupedItems[item.Category].Add(new PromoModels.MarkedItem {
Item = item, MarkedBuys = new Dictionary <string, bool>(), MarkedGets = new Dictionary <string, float>()
});
}
}
foreach (var promo in promos)
{
groupedItems = ApplyPromo(promo, groupedItems);
}
var items = new List <PromoModels.MarkedItem>();
foreach (var item in groupedItems)
{
items.AddRange(item.Value);
}
var prices = ComputePrices(items);
var totalPrice = prices[0];
var totalOffPrice = prices[1];
PromoModels.PromofiedCart promofiedCart = new PromoModels.PromofiedCart {
Items = items, TotalPrice = totalPrice, TotalOffPrice = totalOffPrice
};
return(promofiedCart);
}
public string Post([FromBody] CartModels.Cart cart)
{
return(_cartRepo.AddCart(cart));
}
