//get singleton object
public static PromotionStore GetStore()
{
if (_promotionStore == null)
{
_promotionStore = new PromotionStore();
_promotionStore.SKUItems = new List <SKUItem>();
_promotionStore.Promotions = new List <Promotion>();
}
return(_promotionStore);
}
/// <summary>
/// Processing of Promotions on cart ietms, and set the calculated Value to Total value property
/// </summary>
public void Process()
{
AppliedPromotions = new List <Promotion>();
PromotionStore promotionStore = PromotionStore.GetStore();
List <Promotion> lstPromotions = promotionStore.GetPromotions();
List <OrderSKUQuantity> tempOrderSKUs = SKUs;
TotalValue = 0;
//llop through all promotions
foreach (var item in lstPromotions)
{
decimal min = decimal.MaxValue;
// Checking all Promotion SKUs are available for calculation or not by campring Qunatities of Order & Promotion, Status of OrderSKU(Promo Applied, Not applied)
if (item.promotionSKUs.All(promoSKU => tempOrderSKUs.Exists(orderSku => !orderSku.PromoApplied && orderSku.Quantity > 0 &&
orderSku.SKUId.ToLower() == promoSKU.SKUId.ToLower() && orderSku.Quantity >= promoSKU.Quantity)))
{
// Counting the combinations of Promo SKU's in Order SKU's
foreach (var promoSKU in item.promotionSKUs)
{
min = Math.Min(min, tempOrderSKUs.Where(orderSku => orderSku.SKUId.ToLower() == promoSKU.SKUId.ToLower() && !orderSku.PromoApplied)
.Min(orderSku => (int)orderSku.Quantity / (int)promoSKU.Quantity));
}
//Adding applied Promotion Values to Cart Value.
TotalValue += item.PromoValue * min;
//applying the unit Price of remained Quantity after Promotion is applied, set the PromoApplied flag to not to process same SKU, and also Quantity set to 0.
tempOrderSKUs.ForEach(orderSku =>
{
item.promotionSKUs.ForEach(promoSku =>
{
if (orderSku.SKUId.ToLower() == promoSku.SKUId.ToLower() && !orderSku.PromoApplied)
{
//TotalValue += promotionStore.GetSKUItem(orderSku.SKUId).UnitPrice * (orderSku.Quantity % (promoSku.Quantity * min));
orderSku.Quantity -= promoSku.Quantity * min;
orderSku.PromoApplied = true;
}
});
});
AppliedPromotions.Add(item);
}
}
//Applying the unit price of SKU's which have Quantity.
tempOrderSKUs.ForEach(obj =>
{
if (obj.Quantity != 0)
{
TotalValue += promotionStore.GetSKUItem(obj.SKUId).UnitPrice *obj.Quantity;
}
});
}
