public void Calculate(ref OrderInfo order)
{
if (order.DiscountDetailList == null)
{
order.DiscountDetailList = new List <OrderItemDiscountInfo>();
}
foreach (OrderItemGroup itemGroup in order.OrderItemGroupList)
{
if (itemGroup.PackageNo > 0 && itemGroup.PackageType == 1)
{
ComboInfo combo = PromotionDA.GetComboByComboSysNo(itemGroup.PackageNo);
if (combo != null && combo.Items != null && combo.Items.Count > 0)
{
foreach (ComboItem comboItem in combo.Items)
{
OrderItemDiscountInfo itemDiscount = new OrderItemDiscountInfo();
itemDiscount.DiscountActivityName = combo.SaleRuleName;
itemDiscount.DiscountActivityNo = itemGroup.PackageNo;
itemDiscount.DiscountType = 1;
itemDiscount.PackageNo = itemGroup.PackageNo;
itemDiscount.ProductSysNo = comboItem.ProductSysNo;
itemDiscount.Quantity = itemGroup.Quantity * comboItem.Quantity;
itemDiscount.UnitDiscount = Math.Abs(comboItem.Discount);
itemDiscount.UnitRewardedBalance = 0;
itemDiscount.UnitRewardedPoint = 0;
itemDiscount.UnitShipFeeDiscountAmt = 0;
order.DiscountDetailList.Add(itemDiscount);
}
}
}
}
}
/// <summary>
/// 计算促销折扣金额，主要是进行金额分摊
/// </summary>
/// <param name="order"></param>
private void CalculateDiscountAmount(OrderInfo order)
{
if (order.DiscountDetailList == null || order.DiscountDetailList.Count <= 0)
{
return;
}
decimal unitDiscountAmt = 0m;
foreach (var kvs in order.SubOrderList)
{
//初始化子单上的折扣列表，通过计算，将折扣信息分摊到每个子单上
kvs.Value.DiscountDetailList = new List <OrderItemDiscountInfo>();
//计算该item总计购买数量，需要遍历主商品列表
if (kvs.Value.OrderItemGroupList != null)
{
foreach (var itemGroup in kvs.Value.OrderItemGroupList)
{
if (itemGroup.ProductItemList != null)
{
itemGroup.ProductItemList.ForEach(orderItem =>
{
//暂时还没有考虑整单减免的情况。
//从订单的折扣明细表找到当前item的折扣信息
var discountInfoList = order.DiscountDetailList.FindAll(x => x.ProductSysNo == orderItem.ProductSysNo);
//先考虑和主商品相关的促销折扣
if (discountInfoList != null)
{
//计算item总数量
int totalItemBuyQuantity = 0;
//只考虑主商品折扣
if (order.OrderItemGroupList != null)
{
//计算该主商品购买的总数量
order.OrderItemGroupList.ForEach(g =>
{
totalItemBuyQuantity += g.ProductItemList.Where(x => x.ProductSysNo == orderItem.ProductSysNo)
.Sum(x => x.UnitQuantity * g.Quantity);
});
}
//计算item总折扣
decimal totalDiscountAmt = 0m;
foreach (var discountInfo in discountInfoList)
{
//将折扣信息加入到子单中, 按照item平均折扣重新计算UnitDiscount，并将Quantity填为1
OrderItemDiscountInfo clonedDiscountInfo = (OrderItemDiscountInfo)discountInfo.Clone();
clonedDiscountInfo.Quantity = 1;
clonedDiscountInfo.UnitDiscount = (discountInfo.UnitDiscount * discountInfo.Quantity)
* orderItem.UnitQuantity / totalItemBuyQuantity;
kvs.Value.DiscountDetailList.Add(clonedDiscountInfo);
//计算单个item的平均折扣，同一个商品A如果既存在与套餐C中，又单独购买过，那么discountInfo中记录的是套餐中该商品享受的折扣
//而单独购买的A不享受折扣，这里需要计算的是单个item的平均折扣，计算的时候需要用item的总折扣除以item的总数量
totalDiscountAmt += (discountInfo.UnitDiscount * discountInfo.Quantity);
}
//计算item平均折扣金额，折扣金额为正数
if (totalItemBuyQuantity > 0)
{
unitDiscountAmt = totalDiscountAmt / totalItemBuyQuantity;
orderItem["UnitDiscountAmt"] = unitDiscountAmt;
}
}
});
}
}
}
}
}
