public Task <DiscountValidationResult> ValidateAsync(string promoCode)
{
var discount = _discounts.FirstOrDefault(disc => disc.PromoCode == promoCode);
var isValid = discount != null;
var result = new DiscountValidationResult
{
Discount = discount,
IsValid = isValid,
ErrorMessage = isValid ? string.Empty : "Invalid promo code supplied"
};
return(Task.FromResult(result));
}
/// <summary>
/// Validate discount
/// </summary>
/// <param name="discount">Discount</param>
/// <param name="customer">Customer</param>
/// <param name="currency">Currency</param>
/// <param name="couponCodesToValidate">Coupon codes</param>
/// <returns>Discount validation result</returns>
public virtual async Task <DiscountValidationResult> ValidateDiscount(Discount discount, Customer customer, Currency currency, string[] couponCodesToValidate)
{
if (discount == null)
{
throw new ArgumentNullException(nameof(discount));
}
if (customer == null)
{
throw new ArgumentNullException(nameof(customer));
}
var result = new DiscountValidationResult();
//is enabled and use the same currency
if (!discount.IsEnabled || discount.CurrencyCode != currency.CurrencyCode)
{
return(result);
}
//do not allow use discount in the current store
if (discount.LimitedToStores && !discount.Stores.Any(x => _workContext.CurrentStore.Id == x))
{
result.UserError = _translationService.GetResource("ShoppingCart.Discount.CannotBeUsedInStore");
return(result);
}
//check coupon code
if (discount.RequiresCouponCode)
{
if (couponCodesToValidate == null || !couponCodesToValidate.Any())
{
return(result);
}
var exists = false;
foreach (var item in couponCodesToValidate)
{
if (discount.Reused)
{
if (await ExistsCodeInDiscount(item, discount.Id, null))
{
result.CouponCode = item;
exists = true;
}
}
else
{
if (await ExistsCodeInDiscount(item, discount.Id, false))
{
result.CouponCode = item;
exists = true;
}
}
}
if (!exists)
{
return(result);
}
}
if (discount.DiscountTypeId == DiscountType.AssignedToOrderSubTotal ||
discount.DiscountTypeId == DiscountType.AssignedToOrderTotal)
{
var cart = customer.ShoppingCartItems
.Where(sci => sci.ShoppingCartTypeId == ShoppingCartType.ShoppingCart)
.ToList();
var hasGiftVouchers = cart.Any(x => x.IsGiftVoucher);
if (hasGiftVouchers)
{
result.UserError = _translationService.GetResource("ShoppingCart.Discount.CannotBeUsedWithGiftVouchers");
return(result);
}
}
//time range check
DateTime now = DateTime.UtcNow;
if (discount.StartDateUtc.HasValue)
{
DateTime startDate = DateTime.SpecifyKind(discount.StartDateUtc.Value, DateTimeKind.Utc);
if (startDate.CompareTo(now) > 0)
{
result.UserError = _translationService.GetResource("ShoppingCart.Discount.NotStartedYet");
return(result);
}
}
if (discount.EndDateUtc.HasValue)
{
DateTime endDate = DateTime.SpecifyKind(discount.EndDateUtc.Value, DateTimeKind.Utc);
if (endDate.CompareTo(now) < 0)
{
result.UserError = _translationService.GetResource("ShoppingCart.Discount.Expired");
return(result);
}
}
//discount limitation - n times and n times per user
switch (discount.DiscountLimitationId)
{
case DiscountLimitationType.NTimes:
{
var usedTimes = await GetAllDiscountUsageHistory(discount.Id, null, null, false, 0, 1);
if (usedTimes.TotalCount >= discount.LimitationTimes)
{
return(result);
}
}
break;
case DiscountLimitationType.NTimesPerUser:
{
var usedTimes = await GetAllDiscountUsageHistory(discount.Id, customer.Id, null, false, 0, 1);
if (usedTimes.TotalCount >= discount.LimitationTimes)
{
result.UserError = _translationService.GetResource("ShoppingCart.Discount.CannotBeUsedAnymore");
return(result);
}
}
break;
case DiscountLimitationType.Nolimits:
default:
break;
}
//discount requirements
var requirements = discount.DiscountRules.ToList();
foreach (var req in requirements)
{
//load a plugin
var discountRequirementPlugin = LoadDiscountProviderBySystemName(req.DiscountRequirementRuleSystemName);
if (discountRequirementPlugin == null)
{
continue;
}
if (!discountRequirementPlugin.IsAuthenticateStore(_workContext.CurrentStore))
{
continue;
}
var ruleRequest = new DiscountRuleValidationRequest
{
DiscountRequirementId = req.Id,
DiscountId = req.DiscountId,
Customer = customer,
Store = _workContext.CurrentStore
};
var singleRequirementRule = discountRequirementPlugin.GetRequirementRules().Single(x => x.SystemName == req.DiscountRequirementRuleSystemName);
var ruleResult = await singleRequirementRule.CheckRequirement(ruleRequest);
if (!ruleResult.IsValid)
{
result.UserError = ruleResult.UserError;
return(result);
}
}
result.IsValid = true;
return(result);
}
