public async Task <IActionResult> Check([FromBody] CartPromotionCheckModel cart)
{
return(await this.Execute(isAdmin : false, checkState : true, function : async() =>
{
return this.Ok(await this.promotions.CalculatePromotion(cart));
}));
}
public async Task <CartPromotionResultModel> CalculatePromotion(CartPromotionCheckModel data)
{
Promotion promotion = await this.db.Promotions
.FirstOrDefaultAsync(p => p.PromoCode == data.PromoCode);
if (promotion == null)
{
throw new ArgumentException("Invalid PromoCode");
}
;
if (!await this.IsActive(promotion.StartDate, promotion.EndDate))
{
throw new ArgumentException("Promotion is not active");
}
if (!await this.IsWithinQuota(promotion.UsedQuota, promotion.Quota))
{
throw new ArgumentException("Quota exceeded");
}
//The products included in the promotion
ICollection <string> productsInPromotion = await this.GetProductsInPromotion(data.PromoCode);
//The number of products in the cart that are included in the promotion
int productsInPromotionCount = 0;
foreach (ProductInCartModel product in data.Products)
{
if (productsInPromotion.Contains(product.Id))
{
productsInPromotionCount += product.Quantity;
}
}
//The ids of products included in the promotion from the cart
IList <string> productsInPromotionFromCart = data.Products
.Where(p => productsInPromotion.Contains(p.Id))
.Select(p => p.Id)
.ToList();
if (!await this.IsProductsCountConditionMet(productsInPromotionCount, promotion.ProductsCount))
{
throw new ArgumentException("No promotion available for selected products/ products quantity");
}
if (promotion.IsInclusive)
{
return(await this.CaclulateInclusivePromotion(promotion, data, productsInPromotionCount, productsInPromotionFromCart));
}
else
{
return(await CalculateNotInclusivePromotion(promotion, data, productsInPromotionCount, productsInPromotionFromCart));
}
}
private async Task <CartPromotionResultModel> CaclulateInclusivePromotion(Promotion promotion, CartPromotionCheckModel data, int productsInPromotionCount, IList <string> productsInPromotionFromCart)
{
CartPromotionResultModel result = new CartPromotionResultModel
{
Cart = new List <ProductInCartModel>()
};
int quantityToBeGivenAsPromotion = promotion.IsAccumulative
? (productsInPromotionCount / promotion.ProductsCount) * promotion.DiscountedProductsCount
: promotion.DiscountedProductsCount;
int quantityGivenAsPromotion = 0;
bool includePriceDiscounts = promotion.IncludePriceDiscounts;
decimal promotionDisount = promotion.Discount;
data.Products = await this.OrderProductsInCart(data.Products, includePriceDiscounts);
foreach (ProductInCartModel product in data.Products)
{
int remainingQuantityToBeGivenAsPromotion = quantityToBeGivenAsPromotion - quantityGivenAsPromotion;
ProductDetailsModel currentProduct = await this.products.Get(product.Id);
if (remainingQuantityToBeGivenAsPromotion > 0 && productsInPromotionFromCart.Contains(product.Id))
{
if (includePriceDiscounts)
{
promotionDisount += currentProduct.Discount;
}
if (promotionDisount > 100)
{
promotionDisount = 100;
}
if (product.Quantity > remainingQuantityToBeGivenAsPromotion)
{
ProductInCartModel discounted = new ProductInCartModel
{
Id = product.Id,
Name = currentProduct.Name,
ImageUrl = currentProduct.Images
.Reverse()
.FirstOrDefault(),
Quantity = remainingQuantityToBeGivenAsPromotion,
Price = currentProduct.Price,
Discount = promotionDisount
};
ProductInCartModel productNotDiscounted = new ProductInCartModel
{
Id = product.Id,
Name = currentProduct.Name,
ImageUrl = currentProduct.Images
.Reverse()
.FirstOrDefault(),
Quantity = product.Quantity - remainingQuantityToBeGivenAsPromotion,
Price = currentProduct.Price,
Discount = includePriceDiscounts ? currentProduct.Discount : 0
};
result.Cart.Add(discounted);
result.Cart.Add(productNotDiscounted);
quantityGivenAsPromotion += remainingQuantityToBeGivenAsPromotion;
}
else
{
ProductInCartModel discounted = new ProductInCartModel
{
Id = product.Id,
Name = currentProduct.Name,
ImageUrl = currentProduct.Images
.Reverse()
.FirstOrDefault(),
Quantity = product.Quantity,
Price = currentProduct.Price,
Discount = promotionDisount
};
result.Cart.Add(discounted);
quantityGivenAsPromotion += product.Quantity;
}
}
else
{
product.Name = currentProduct.Name;
product.ImageUrl = currentProduct.Images.Reverse().FirstOrDefault();
product.Price = currentProduct.Price;
product.Discount = !includePriceDiscounts && productsInPromotionFromCart.Contains(product.Id) ? 0 : currentProduct.Discount;
result.Cart.Add(product);
}
}
return(result);
}
private async Task <CartPromotionResultModel> CalculateNotInclusivePromotion(Promotion promotion, CartPromotionCheckModel data, int productsInPromotionCount, IList <string> productsInPromotionFromCart)
{
CartPromotionResultModel result = new CartPromotionResultModel
{
Cart = new List <ProductInCartModel>()
};
int quantityToBeGivenAsPromotion = promotion.IsAccumulative
? (productsInPromotionCount / promotion.ProductsCount) * promotion.DiscountedProductsCount
: promotion.DiscountedProductsCount;
bool includePriceDiscounts = promotion.IncludePriceDiscounts;
decimal promotionDiscount = promotion.Discount;
IList <string> freeProductIds = await this.db.DiscountedProductsPromotions
.Where(d => d.PromotionId == promotion.Id)
.Select(p => p.ProductId)
.ToListAsync();
//if (freeProductIds.Count == 1)
//{
// string freeProductId = freeProductIds.FirstOrDefault();
// ProductDetailsModel productDetails = await this.products.Get(freeProductId);
// if (includePriceDiscounts) promotionDiscount += productDetails.Discount;
// if (promotionDiscount > 100) promotionDiscount = 100;
// ProductInCartModel freeProduct = new ProductInCartModel
// {
// Id = freeProductId,
// Name = productDetails.Name,
// ImageUrl = productDetails.Images.Reverse().FirstOrDefault(),
// Quantity = quantityToBeGivenAsPromotion,
// Price = productDetails.Price,
// Discount = promotionDiscount
// };
// result.Cart.Add(freeProduct);
//}
//else
//{
result.DiscountedProductsCount = quantityToBeGivenAsPromotion;
result.DiscountedProducts = new List <ProductDetailsModel>();
foreach (string id in freeProductIds)
{
ProductDetailsModel product = await this.products.Get(id);
result.DiscountedProducts.Add(product);
}
if (!includePriceDiscounts)
{
foreach (ProductDetailsModel product in result.DiscountedProducts)
{
product.Discount = promotion.Discount;
}
}
else
{
foreach (ProductDetailsModel product in result.DiscountedProducts)
{
product.Discount += promotionDiscount;
if (product.Discount > 100)
{
product.Discount = 100;
}
}
}
//}
foreach (ProductInCartModel product in data.Products)
{
ProductDetailsModel currentProduct = await this.products.Get(product.Id);
decimal discount = currentProduct.Discount;
if (productsInPromotionFromCart.Contains(currentProduct.Id) && !includePriceDiscounts)
{
discount = 0;
}
ProductInCartModel modifiedProduct = new ProductInCartModel
{
Id = product.Id,
Name = currentProduct.Name,
ImageUrl = currentProduct.Images
.Reverse()
.FirstOrDefault(),
Quantity = product.Quantity,
Price = currentProduct.Price,
Discount = discount
};
result.Cart.Add(modifiedProduct);
}
return(result);
}