public void ScenarioB()
{
PromotionController promotionController = new PromotionController();
PromotionRequestModel request = new PromotionRequestModel();
PromotionResponseModel response = new PromotionResponseModel();
request.PromotionId = 1;
request.CartItems.Add(
new CartItemModel
{
ItemName = "A",
ItemQty = 5
});
request.CartItems.Add(new CartItemModel
{
ItemName = "B",
ItemQty = 5
});
request.CartItems.Add(new CartItemModel
{
ItemName = "C",
ItemQty = 1
});
response = promotionController.ApplyPromotion(request);
Assert.AreEqual(370, response.TotalCost);
}
public PromotionResponseModel ApplyPromotion(PromotionRequestModel request)
{
PromotionResponseModel response = new PromotionResponseModel();
PromotionBusiness promotionBusiness = new PromotionBusiness();
response.TotalCost = 0;
//Retrieve SKU Promotion data from database
response.PromotionApplied = promotionBusiness.GetPromotion(request.PromotionId);
using (PromotionEngineEntities query = new PromotionEngineEntities())
{
//Retrieve SKU price from databse
var dbItems = (from cartItems in request.CartItems
join items in query.Items
on cartItems.ItemName equals items.ItemName
select new { cartItems.ItemQty, items.ItemName, items.ItemPrice }).ToList();
foreach (FormulaResponseModel formula in response.PromotionApplied.PromotionFormulas)
{
string[] formulaItemNames = formula.ItemNames.Split('&');
//Logic to calculate the purchase of 'n' items of a SKU for a fixed price
if (formulaItemNames.Length > 0 && formulaItemNames.Length == 1)
{
foreach (var dbitem in dbItems)
{
if (dbitem.ItemName == formulaItemNames.Single())
{
response.TotalCost += (((dbitem.ItemQty - (dbitem.ItemQty % formula.ItemQty)) / (formula.ItemQty)) * formula.PromotionValue) +
((dbitem.ItemQty % formula.ItemQty) * dbitem.ItemPrice);
}
}
}
//Logic to calculate the purchase of SKU 1 & SKU 2 ,.SKU 'n' for a fixed price
else if (formulaItemNames.Length > 1)
{
var filteredDBItems = (from filtereddbItems in dbItems
join filter in formulaItemNames
on filtereddbItems.ItemName equals filter
select new { filtereddbItems.ItemQty, filtereddbItems.ItemName, filtereddbItems.ItemPrice }).ToList();
if (formulaItemNames.Length == filteredDBItems.Count())
{
int itemsFixedPrice = filteredDBItems.Min(q => q.ItemQty);
response.TotalCost += itemsFixedPrice * formula.PromotionValue;
foreach (var item in filteredDBItems)
{
response.TotalCost += ((item.ItemQty - itemsFixedPrice) * item.ItemPrice);
}
}
else
{
foreach (var item in filteredDBItems)
{
response.TotalCost += (item.ItemQty * item.ItemPrice);
}
}
}
}
}
return(response);
}