protected virtual List <OrderLine> GetOrderLinesInScope(CouponTemplateData couponTemplate, Order order,
Dictionary <Guid, ProductDto> productDict)
{
if (couponTemplate.IsUnscoped)
{
return(order.OrderLines);
}
var expectedOrderLines = new List <OrderLine>();
foreach (var scope in couponTemplate.Scopes.Where(scope => scope.StoreId == order.StoreId))
{
expectedOrderLines.AddRange(order.OrderLines
.WhereIf(scope.ProductGroupName != null,
x => productDict[x.ProductId].ProductGroupName == scope.ProductGroupName)
.WhereIf(scope.ProductId.HasValue, x => x.ProductId == scope.ProductId)
.WhereIf(scope.ProductSkuId.HasValue, x => x.ProductSkuId == scope.ProductSkuId));
}
if (expectedOrderLines.IsNullOrEmpty())
{
throw new OrderDoesNotMeetCouponUsageConditionException();
}
if (expectedOrderLines.Sum(x => GetOrderLineProductPrice(x, productDict) * x.Quantity) <
couponTemplate.ConditionAmount)
{
throw new OrderDoesNotMeetCouponUsageConditionException();
}
return(expectedOrderLines);
}
protected virtual void DiscountOrderLines(CouponTemplateData couponTemplate, Order order,
List <OrderLine> orderLinesInScope)
{
// Todo: support Custom coupon.
if (couponTemplate.CouponType == CouponType.Custom)
{
throw new NotSupportedException();
}
var totalOrderLineActualTotalPrice = orderLinesInScope.Sum(x => x.ActualTotalPrice);
var totalDiscountedAmount = couponTemplate.CouponType == CouponType.PerMeet
? couponTemplate.DiscountAmount *
Math.Floor(totalOrderLineActualTotalPrice / couponTemplate.ConditionAmount)
: couponTemplate.DiscountAmount;
if (totalDiscountedAmount > totalOrderLineActualTotalPrice)
{
totalDiscountedAmount = totalOrderLineActualTotalPrice;
}
var remainingDiscountedAmount = totalDiscountedAmount;
// Todo: https://github.com/EasyAbp/EShop/issues/104
const int accuracy = 2;
foreach (var orderLine in orderLinesInScope)
{
var maxDiscountAmount =
Math.Round(orderLine.ActualTotalPrice / totalOrderLineActualTotalPrice * totalDiscountedAmount,
accuracy, MidpointRounding.ToZero);
var discountAmount = maxDiscountAmount > orderLine.ActualTotalPrice
? orderLine.ActualTotalPrice
: maxDiscountAmount;
order.AddDiscount(orderLine.Id, discountAmount);
remainingDiscountedAmount -= discountAmount;
}
foreach (var orderLine in orderLinesInScope.OrderByDescending(x => x.ActualTotalPrice))
{
if (remainingDiscountedAmount == decimal.Zero)
{
break;
}
var discountAmount = remainingDiscountedAmount > orderLine.ActualTotalPrice
? orderLine.ActualTotalPrice
: remainingDiscountedAmount;
order.AddDiscount(orderLine.Id, discountAmount);
remainingDiscountedAmount -= discountAmount;
}
if (remainingDiscountedAmount != decimal.Zero)
{
throw new ApplicationException();
}
order.SetProperty(CouponsConsts.OrderCouponDiscountAmountPropertyName, totalDiscountedAmount);
}
protected virtual bool IsCurrencyExpected(CouponTemplateData couponTemplate, Order order)
{
return(couponTemplate.Currency == order.Currency);
}
