/// <summary>
/// Validate discount
/// </summary>
/// <param name="discount">Discount</param>
/// <param name="customer">Customer</param>
/// <param name="couponCodesToValidate">Coupon codes to validate</param>
/// <returns>Discount validation result</returns>
public virtual DiscountValidationResult ValidateDiscount(DiscountForCaching discount, Customer customer, string[] couponCodesToValidate)
{
if (discount == null)
{
throw new ArgumentNullException("discount");
}
if (customer == null)
{
throw new ArgumentNullException("customer");
}
//invalid by default
var result = new DiscountValidationResult();
//check coupon code
if (discount.RequiresCouponCode)
{
if (String.IsNullOrEmpty(discount.CouponCode))
{
return(result);
}
if (couponCodesToValidate == null)
{
return(result);
}
if (!couponCodesToValidate.Any(x => x.Equals(discount.CouponCode, StringComparison.InvariantCultureIgnoreCase)))
{
return(result);
}
}
//Do not allow discounts applied to order subtotal or total when a customer has gift cards in the cart.
//Otherwise, this customer can purchase gift cards with discount and get more than paid ("free money").
if (discount.DiscountType == DiscountType.AssignedToOrderSubTotal ||
discount.DiscountType == DiscountType.AssignedToOrderTotal)
{
var cart = customer.ShoppingCartItems
.Where(sci => sci.ShoppingCartType == ShoppingCartType.ShoppingCart)
.LimitPerStore(_storeContext.CurrentStore.Id)
.ToList();
var hasGiftCards = cart.Any(x => x.Product.IsGiftCard);
if (hasGiftCards)
{
result.Errors = new List <string> {
_localizationService.GetResource("ShoppingCart.Discount.CannotBeUsedWithGiftCards")
};
return(result);
}
}
//check date range
DateTime now = DateTime.UtcNow;
if (discount.StartDateUtc.HasValue)
{
DateTime startDate = DateTime.SpecifyKind(discount.StartDateUtc.Value, DateTimeKind.Utc);
if (startDate.CompareTo(now) > 0)
{
result.Errors = new List <string> {
_localizationService.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.Errors = new List <string> {
_localizationService.GetResource("ShoppingCart.Discount.Expired")
};
return(result);
}
}
//discount limitation
switch (discount.DiscountLimitation)
{
case DiscountLimitationType.NTimesOnly:
{
var usedTimes = GetAllDiscountUsageHistory(discount.Id, null, null, 0, 1).TotalCount;
if (usedTimes >= discount.LimitationTimes)
{
return(result);
}
}
break;
case DiscountLimitationType.NTimesPerCustomer:
{
if (customer.IsRegistered())
{
var usedTimes = GetAllDiscountUsageHistory(discount.Id, customer.Id, null, 0, 1).TotalCount;
if (usedTimes >= discount.LimitationTimes)
{
result.Errors = new List <string> {
_localizationService.GetResource("ShoppingCart.Discount.CannotBeUsedAnymore")
};
return(result);
}
}
}
break;
case DiscountLimitationType.Unlimited:
default:
break;
}
//discount requirements
string key = string.Format(DiscountEventConsumer.DISCOUNT_REQUIREMENT_MODEL_KEY, discount.Id);
var requirementsForCaching = _cacheManager.Get(key, () =>
{
var requirements = GetAllDiscountRequirements(discount.Id, true);
return(GetReqirementsForCaching(requirements));
});
//get top-level group
var topLevelGroup = requirementsForCaching.FirstOrDefault();
if (topLevelGroup == null || (topLevelGroup.IsGroup && !topLevelGroup.ChildRequirements.Any()) || !topLevelGroup.InteractionType.HasValue)
{
//there are no requirements, so discount is valid
result.IsValid = true;
return(result);
}
//requirements are exist, let's check them
var errors = new List <string>();
result.IsValid = GetValidationResult(requirementsForCaching, topLevelGroup.InteractionType.Value, customer, errors);
//set errors if result is not valid
if (!result.IsValid)
{
result.Errors = errors;
}
return(result);
}
public DiscountValidationResult ValidateDiscount(Discount discount, Customer customer, string couponCodeToValidate)
{
if (discount == null)
{
throw new ArgumentNullException("discount");
}
if (customer == null)
{
throw new ArgumentNullException("customer");
}
//invalid by default
var result = new DiscountValidationResult();
//check coupon code
if (discount.RequiresCouponCode)
{
if (String.IsNullOrEmpty(discount.CouponCode))
{
return(result);
}
if (!discount.CouponCode.Equals(couponCodeToValidate, StringComparison.InvariantCultureIgnoreCase))
{
return(result);
}
}
//Do not allow discounts applied to order subtotal or total when a customer has gift cards in the cart.
//Otherwise, this customer can purchase gift cards with discount and get more than paid ("free money").
if (discount.DiscountType == DiscountType.AssignedToOrderSubTotal ||
discount.DiscountType == DiscountType.AssignedToOrderTotal)
{
var cart = customer.ShoppingCartItems
.Where(sci => sci.ShoppingCartType == ShoppingCartType.ShoppingCart)
.LimitPerStore(_storeContext.CurrentStore.Id)
.ToList();
var hasGiftCards = cart.Any(x => x.Product.IsGiftCard);
if (hasGiftCards)
{
result.UserError = _localizationService.GetResource("ShoppingCart.Discount.CannotBeUsedWithGiftCards");
return(result);
}
}
//check date range
DateTime now = DateTime.UtcNow;
if (discount.StartDateUtc.HasValue)
{
DateTime startDate = DateTime.SpecifyKind(discount.StartDateUtc.Value, DateTimeKind.Utc);
if (startDate.CompareTo(now) > 0)
{
result.UserError = _localizationService.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 = _localizationService.GetResource("ShoppingCart.Discount.Expired");
return(result);
}
}
//discount limitation
switch (discount.DiscountLimitation)
{
case DiscountLimitationType.NTimesOnly:
{
var usedTimes = GetAllDiscountUsageHistory(discount.Id, null, null, 0, 1).TotalCount;
if (usedTimes >= discount.LimitationTimes)
{
return(result);
}
}
break;
case DiscountLimitationType.NTimesPerCustomer:
{
if (customer.IsRegistered())
{
var usedTimes = GetAllDiscountUsageHistory(discount.Id, customer.Id, null, 0, 1).TotalCount;
if (usedTimes >= discount.LimitationTimes)
{
result.UserError = _localizationService.GetResource("ShoppingCart.Discount.CannotBeUsedAnymore");
return(result);
}
}
}
break;
case DiscountLimitationType.Unlimited:
default:
break;
}
//discount requirements
//UNDONE we should inject static cache manager into constructor. we we already have "per request" cache manager injected. better way to do it?
//we cache meta info of rdiscount requirements. this way we should not load them for each HTTP request
var staticCacheManager = EngineContext.Current.ContainerManager.Resolve <ICacheManager>("nop_cache_static");
string key = string.Format(DiscountRequirementEventConsumer.DISCOUNT_REQUIREMENT_MODEL_KEY, discount.Id);
//var requirements = discount.DiscountRequirements;
var requirements = staticCacheManager.Get(key, () =>
{
var cachedRequirements = new List <DiscountRequirementForCaching>();
foreach (var dr in discount.DiscountRequirements)
{
cachedRequirements.Add(new DiscountRequirementForCaching
{
Id = dr.Id,
SystemName = dr.DiscountRequirementRuleSystemName
});
}
return(cachedRequirements);
});
foreach (var req in requirements)
{
//load a plugin
var requirementRulePlugin = LoadDiscountRequirementRuleBySystemName(req.SystemName);
if (requirementRulePlugin == null)
{
continue;
}
if (!_pluginFinder.AuthenticateStore(requirementRulePlugin.PluginDescriptor, _storeContext.CurrentStore.Id))
{
continue;
}
var ruleRequest = new DiscountRequirementValidationRequest
{
DiscountRequirementId = req.Id,
Customer = customer,
Store = _storeContext.CurrentStore
};
var ruleResult = requirementRulePlugin.CheckRequirement(ruleRequest);
if (!ruleResult.IsValid)
{
result.UserError = ruleResult.UserError;
return(result);
}
}
result.IsValid = true;
return(result);
}
