/// <summary>
/// Calculates any product specific discounts for the basket
/// </summary>
/// <param name="basket">Basket to calculate discounts for</param>
/// <param name="productsToExclude">Any products to exclude from discounting</param>
/// <returns>The total discount applied to the basket</returns>
private static LSDecimal CalculateProductDiscounts(Basket basket, List <int> productsToExclude)
{
LSDecimal totalDiscount = 0;
//GET ALL PRODUCTS FROM THE BASKET THAT HAVE DISCOUNTS DIRECTLY ASSOCIATED
//TODO: UPDATE THE METHOD BELOW TO FACTOR IN THE COMBINE VARIANTS IN LINE ITEM DISCOUNT MODE SETTING
DiscountedBasketProduct[] discountedItems = DiscountCalculator.GetDiscountedBasketProducts(basket.BasketId, productsToExclude);
if (discountedItems != null && discountedItems.Length > 0)
{
//EVALUATE EACH ITEM TO SEE WHETHER THE PRODUCT DISCOUNT APPLIES
foreach (DiscountedBasketProduct discountedProduct in discountedItems)
{
VolumeDiscount appliedDiscount = null;
LSDecimal discountAmount = -1;
//LOOP ALL AVAILABLE DISCOUNTS AND FIND THE BEST ONE
VolumeDiscountCollection availableDiscounts = VolumeDiscountDataSource.LoadForProduct(discountedProduct.ProductId);
foreach (VolumeDiscount testDiscount in availableDiscounts)
{
if (testDiscount.IsValidForUser(basket.User))
{
LSDecimal tempDiscountAmount = testDiscount.CalculateDiscount(discountedProduct.Quantity, discountedProduct.Quantity, discountedProduct.ExtendedPrice, discountedProduct.ExtendedPrice);
if (tempDiscountAmount > discountAmount)
{
discountAmount = tempDiscountAmount;
appliedDiscount = testDiscount;
}
}
}
//CHECK WHETHER A DISCOUNT APPLIES TO THIS PRODUCT FOR THIS USER
if (appliedDiscount != null)
{
//productsToExclude.Add(discountedProduct.ProductId);
List <BasketItem> newItems = new List <BasketItem>();
//LOOP ALL ITEMS IN BASKET, CALCULATE DISCOUNT FOR MATCHING PRODUCTS
foreach (BasketItem basketItem in basket.Items)
{
if (basketItem.ProductId == discountedProduct.ProductId)
{
//THIS IS A DISCOUNTED PRODUCT, CREATE THE DISCOUNT LINE ITEM
discountAmount = appliedDiscount.CalculateDiscount(basketItem.Quantity, discountedProduct.Quantity, basketItem.ExtendedPrice, discountedProduct.ExtendedPrice);
if (discountAmount > 0)
{
//DISCOUNT AMOUNT SHOULD NOT BE GREATER THEN PARENT ITEM TOTAL
if (discountAmount > basketItem.ExtendedPrice)
{
discountAmount = basketItem.ExtendedPrice;
}
//DISCOUNT MUST BE ADJUSTED FOR OPTIONS THAT ARE GROUPED
BasketItem discountLineItem = new BasketItem();
discountLineItem.BasketId = basket.BasketId;
discountLineItem.OrderItemType = OrderItemType.Discount;
discountLineItem.ParentItemId = basketItem.BasketItemId;
discountLineItem.BasketShipmentId = basketItem.BasketShipmentId;
discountLineItem.Name = appliedDiscount.Name;
discountLineItem.Sku = appliedDiscount.VolumeDiscountId.ToString();
discountLineItem.Price = (-1 * discountAmount);
discountLineItem.Quantity = 1; // basketItem.Quantity;
discountLineItem.TaxCodeId = basketItem.TaxCodeId;
discountLineItem.Shippable = basketItem.Shippable;
discountLineItem.Save();
newItems.Add(discountLineItem);
totalDiscount += discountAmount;
}
}
}
//ADD ANY NEW ITEMS TO THE BASKET COLLECTION
foreach (BasketItem basketItem in newItems)
{
basket.Items.Add(basketItem);
}
//AT LEAST ONE DISCOUNT WAS APPLICABLE TO THIS USER
//ADD THIS PRODUCT TO EXCLUDE LIST
if (productsToExclude.IndexOf(discountedProduct.ProductId) < 0)
{
productsToExclude.Add(discountedProduct.ProductId);
}
}
}
}
return(totalDiscount);
}
private static LSDecimal Calculate_LineItemMode(Basket basket)
{
//KEEP TRACK OF TOTAL DISCOUNT APPLIED
LSDecimal totalDiscount = 0;
//CLEAR EXISTING DISCOUNTS FROM THE BASKET
ClearExistingDiscounts(basket);
//BUILD A LIST OF PRODUCTS THAT HAVE DISCOUNTS SPECIFICALLY APPLIED
//THESE PRODUCTS CANNOT RECEIVE ANY FURTHER DISCOUNTS
List <int> productsToExclude = new List <int>();
//INITIALLY POPULATE THE LIST WITH ANY GIFT CERTIFICATE PRODUCT IS AS THESE
//PRODUCTS ARE NOT ALLOWED TO BE DISCOUNTED
productsToExclude.AddRange(DiscountCalculator.GetGiftCertificateProductIds(basket.BasketId));
//CALCULATE THE PRODUCT LEVEL DISCOUNTS
totalDiscount += CalculateProductDiscounts(basket, productsToExclude);
//GET POTENTIAL PRODUCT DISCOUNTS
Dictionary <int, List <PotentialDiscount> > potentialDiscounts = DiscountCalculator.GetPotentialDiscounts(basket, productsToExclude, GroupingMode.Product);
//BUILD A QUANTITY AND VALUE LOOKUP TABLE, IF NEEDED TO COMBINE OPTIONS
Dictionary <int, int> productQuantityLookup = null;
Dictionary <int, LSDecimal> productValueLookup = null;
bool combineVariantsInLineItemDiscountMode = Store.GetCachedSettings().CombineVariantsInLineItemDiscountMode;
if (combineVariantsInLineItemDiscountMode)
{
productQuantityLookup = new Dictionary <int, int>();
productValueLookup = new Dictionary <int, LSDecimal>();
foreach (BasketItem bi in basket.Items)
{
if (productQuantityLookup.ContainsKey(bi.ProductId))
{
productQuantityLookup[bi.ProductId] += bi.Quantity;
productValueLookup[bi.ProductId] += bi.ExtendedPrice;
}
else
{
productQuantityLookup[bi.ProductId] = bi.Quantity;
productValueLookup[bi.ProductId] = bi.ExtendedPrice;
}
}
}
//LOOP BASKET ITEMS
List <BasketItem> newItems = new List <BasketItem>();
foreach (BasketItem bi in basket.Items)
{
//SEE WHETHER THIS PRODUCT HAS ANY POTENTIAL DISCOUNTS
if (potentialDiscounts.ContainsKey(bi.ProductId))
{
//GET THE POTENTIAL DISCOUNTS FOR THIS PRODUCT
List <PotentialDiscount> productDiscounts = potentialDiscounts[bi.ProductId];
//FIND THE BEST DISCOUNT
VolumeDiscount appliedDiscount = null;
LSDecimal discountAmount = -1;
for (int i = 0; i < productDiscounts.Count; i++)
{
VolumeDiscount tempDiscount = VolumeDiscountDataSource.Load(productDiscounts[i].VolumeDiscountId);
//DETERMINE THE QUANTITY USED TO CALCULATE DISCOUNT
int totalProductQuantity;
LSDecimal totalProductValue;
if (combineVariantsInLineItemDiscountMode)
{
totalProductQuantity = productQuantityLookup[bi.ProductId];
totalProductValue = productValueLookup[bi.ProductId];
}
else
{
totalProductQuantity = bi.Quantity;
totalProductValue = bi.ExtendedPrice;
}
//CHECK THIS DISCOUNT AMOUNT
LSDecimal tempDiscountAmount = tempDiscount.CalculateDiscount(bi.Quantity, totalProductQuantity, bi.ExtendedPrice, totalProductValue);
//SEE WHETHER THIS CALCULATED DISCOUNT IS THE GREATEST VALUE
if (tempDiscountAmount > discountAmount)
{
//THIS DISCOUNT HAS A HIGHER VALUE THAN THE LAST TESTED
//MAKE THIS THE APPLIED DISCOUNT
discountAmount = tempDiscountAmount;
appliedDiscount = tempDiscount;
}
}
//CREATE THE DISCOUNT ITEM IF REQUIRED
if (discountAmount > 0)
{
//DISCOUNT AMOUNT SHOULD NOT BE GREATER THEN PARENT ITEM TOTAL
if (discountAmount > bi.ExtendedPrice)
{
discountAmount = bi.ExtendedPrice;
}
BasketItem discountLineItem = new BasketItem();
discountLineItem.BasketId = basket.BasketId;
discountLineItem.OrderItemType = OrderItemType.Discount;
discountLineItem.ParentItemId = bi.BasketItemId;
discountLineItem.BasketShipmentId = bi.BasketShipmentId;
discountLineItem.Name = appliedDiscount.Name;
discountLineItem.Sku = appliedDiscount.VolumeDiscountId.ToString();
discountLineItem.Price = (-1 * discountAmount);
discountLineItem.Quantity = 1; //bi.Quantity;
discountLineItem.TaxCodeId = bi.TaxCodeId;
discountLineItem.Shippable = bi.Shippable;
newItems.Add(discountLineItem);
totalDiscount += discountAmount;
}
}
}
//ADD DISCOUNT ITEMS TO BASKET
foreach (BasketItem bi in newItems)
{
basket.Items.Add(bi);
bi.Save();
}
//RETURN THE TOTAL DISCOUNT APPLIED
return(totalDiscount);
}
private static LSDecimal Calculate_GroupingMode(Basket basket)
{
//KEEP TRACK OF TOTAL DISCOUNT APPLIED
LSDecimal totalDiscount = 0;
//CLEAR EXISTING DISCOUNTS FROM THE BASKET
ClearExistingDiscounts(basket);
//BUILD A LIST OF PRODUCTS THAT HAVE DISCOUNTS SPECIFICALLY APPLIED
//THESE PRODUCTS CANNOT RECEIVE ANY FURTHER DISCOUNTS
List <int> productsToExclude = new List <int>();
//INITIALLY POPULATE THE LIST WITH ANY GIFT CERTIFICATE PRODUCT IS AS THESE
//PRODUCTS ARE NOT ALLOWED TO BE DISCOUNTED
productsToExclude.AddRange(DiscountCalculator.GetGiftCertificateProductIds(basket.BasketId));
//CALCULATE THE PRODUCT LEVEL DISCOUNTS
totalDiscount += CalculateProductDiscounts(basket, productsToExclude);
//GET POTENTIAL CATEGORY DISCOUNTS
//THE DICTIONARY KEY WILL BE CATEGORY LEVEL
//POTENTIAL DISCOUNTS ARE THOSE THAT COULD APPLY AT THE SAME SPECIFICITY
//THE POTENTIAL DISCOUNTS ARE ORDERED FROM MOST SPECIFIC CATEGORY LEVEL TO LEAST
Dictionary <int, List <PotentialDiscount> > potentialDiscounts = DiscountCalculator.GetPotentialDiscounts(basket, productsToExclude, GroupingMode.Category);
//LOOP THE DISCOUNTED CATEGORIES
//WE HAVE TO CHECK ALL POTENTIAL DISCOUNTS AT EACH CATEGORY LEVEL
//TO DETERMINE WHICH ONE TO APPLY
List <BasketItem> newItems = new List <BasketItem>();
foreach (int categoryLevel in potentialDiscounts.Keys)
{
//IF WE FIND A DISCOUNT AT THIS LEVEL, IT SHOULD BE APPLIED, THEN WE
//SHOULD RECHECK DISCOUNTS AT THIS LEVEL TO SEE IF ANY OTHERS APPLY
bool recheckThisLevel = false;
List <int> appliedCategories = new List <int>();
do
{
LSDecimal appliedDiscountAmount = -1;
VolumeDiscount appliedDiscount = null;
int appliedCategoryId = 0;
List <PotentialDiscount> discountGroup = potentialDiscounts[categoryLevel];
foreach (PotentialDiscount pd in discountGroup)
{
if (appliedCategories.IndexOf(pd.CategoryId) < 0)
{
//GET ALL BASKET ITEMS ELIGIBLE FOR DISCOUNT IN THIS CATEGORY
BasketItemCollection eligibleItems = DiscountCalculator.GetCategoryItems(pd.CategoryId, basket, productsToExclude);
//TOTAL UP ITEMS FOR GROUPING MODE
int totalQuantity = eligibleItems.TotalQuantity();
if (totalQuantity > 0)
{
LSDecimal totalPrice = eligibleItems.TotalPrice();
VolumeDiscount tempDiscount = VolumeDiscountDataSource.Load(pd.VolumeDiscountId);
//JUST USE TOTALS TO DETERMINE OVERALL DISCOUNT
LSDecimal tempDiscountAmount = tempDiscount.CalculateDiscount(totalQuantity, totalQuantity, totalPrice, totalPrice);
if (tempDiscountAmount > appliedDiscountAmount)
{
appliedDiscountAmount = tempDiscountAmount;
appliedDiscount = tempDiscount;
appliedCategoryId = pd.CategoryId;
}
}
}
}
//SEE WHETHER WE FOUND A DISCOUNT AT THIS LEVEL
if (appliedDiscount != null)
{
//GET ALL BASKET ITEMS ELIGIBLE FOR DISCOUNT IN THIS CATEGORY
BasketItemCollection eligibleItems = DiscountCalculator.GetCategoryItems(appliedCategoryId, basket, productsToExclude);
//TOTAL UP ITEMS FOR GROUPING MODE
int totalQuantity = eligibleItems.TotalQuantity();
LSDecimal totalPrice = eligibleItems.TotalPrice();
//LOOP ALL BASKET ITEMS TO ADD DISCOUNTS TO BASKET
foreach (BasketItem bi in eligibleItems)
{
LSDecimal discountAmount = appliedDiscount.CalculateDiscount(bi.Quantity, totalQuantity, bi.ExtendedPrice, totalPrice);
if (discountAmount > 0)
{
//DISCOUNT AMOUNT SHOULD NOT BE GREATER THEN PARENT ITEM TOTAL
if (discountAmount > bi.ExtendedPrice)
{
discountAmount = bi.ExtendedPrice;
}
//DISCOUNT MUST BE ADJUSTED FOR OPTIONS THAT ARE GROUPED
BasketItem discountLineItem = new BasketItem();
discountLineItem.BasketId = basket.BasketId;
discountLineItem.OrderItemType = OrderItemType.Discount;
discountLineItem.ParentItemId = bi.BasketItemId;
discountLineItem.BasketShipmentId = bi.BasketShipmentId;
discountLineItem.Name = appliedDiscount.Name;
discountLineItem.Sku = appliedDiscount.VolumeDiscountId.ToString();
discountLineItem.Price = (-1 * discountAmount);
discountLineItem.Quantity = 1; //bi.Quantity;
discountLineItem.TaxCodeId = bi.TaxCodeId;
discountLineItem.Shippable = bi.Shippable;
basket.Items.Add(discountLineItem);
discountLineItem.Save();
totalDiscount += discountAmount;
}
if (productsToExclude.IndexOf(bi.ProductId) < 0)
{
productsToExclude.Add(bi.ProductId);
}
}
}
//IF A CATEGORY DISCOUNT WAS APPLIED
//AND THERE IS MORE THAN ONE DISCOUNT AT THIS LEVEL,
//WE MUST RECHECK THIS LEVEL
recheckThisLevel = ((appliedCategoryId > 0) && (potentialDiscounts[categoryLevel].Count > 1));
} while (recheckThisLevel);
}
//ADD DISCOUNT ITEMS TO BASKET
foreach (BasketItem bi in newItems)
{
basket.Items.Add(bi);
bi.Save();
}
//RETURN THE CALCULATED DISCOUNT
return(totalDiscount);
}
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