public bool CanApplyDiscount(string couponCode, int userId, out DiscountApplicationStatus status)
{
if (couponCode.IsNullEmptyOrWhiteSpace())
{
status = DiscountApplicationStatus.InvalidCode;
return(false);
}
//first get the coupon
var discountCoupon = _discountCouponService.GetByCouponCode(couponCode);
return(CanApplyDiscount(discountCoupon, userId, out status));
}
public bool CanApplyDiscount(DiscountCoupon discountCoupon, int userId, out DiscountApplicationStatus status)
{
if (discountCoupon == null || !discountCoupon.Enabled)
{
status = DiscountApplicationStatus.InvalidCode;
return(false);
}
if (discountCoupon.Expired)
{
status = DiscountApplicationStatus.Expired;
return(false);
}
//first the dates
if (discountCoupon.StartDate > DateTime.UtcNow)
{
status = DiscountApplicationStatus.InvalidCode;
return(false);
}
if (discountCoupon.EndDate.HasValue && discountCoupon.EndDate < DateTime.UtcNow)
{
status = DiscountApplicationStatus.Expired;
return(false);
}
//number of usages
if (discountCoupon.TotalNumberOfTimes > 0)
{
var orderCount = _orderService.Count(x =>
x.DiscountId == discountCoupon.Id && x.PaymentStatus == PaymentStatus.Complete);
if (orderCount >= discountCoupon.TotalNumberOfTimes)
{
status = DiscountApplicationStatus.Exhausted;
return(false);
}
}
if (discountCoupon.NumberOfTimesPerUser > 0)
{
var orderCount = _orderService.Count(x =>
x.DiscountId == discountCoupon.Id && x.PaymentStatus == PaymentStatus.Complete && x.UserId == userId);
if (orderCount >= discountCoupon.NumberOfTimesPerUser)
{
status = DiscountApplicationStatus.Exhausted;
return(false);
}
}
status = DiscountApplicationStatus.Success;
return(true);
}
public bool CanApplyDiscount(int couponCodeId, int userId, out DiscountApplicationStatus status)
{
var discountCoupon = _discountCouponService.FirstOrDefault(x => x.Id == couponCodeId);
return(CanApplyDiscount(discountCoupon, userId, out status));
}
