/// <summary>
/// Gets the discount amount for the specified value
/// </summary>
/// <param name="discount">Discount</param>
/// <param name="amount">Amount</param>
/// <returns>The discount amount</returns>
public virtual decimal GetDiscountAmount(DiscountForCaching discount, decimal amount)
{
if (discount == null)
{
throw new ArgumentNullException(nameof(discount));
}
//calculate discount amount
decimal result;
if (discount.UsePercentage)
{
result = (decimal)((float)amount * (float)discount.DiscountPercentage / 100f);
}
else
{
result = discount.DiscountAmount;
}
//validate maximum discount amount
if (discount.UsePercentage &&
discount.MaximumDiscountAmount.HasValue &&
result > discount.MaximumDiscountAmount.Value)
{
result = discount.MaximumDiscountAmount.Value;
}
if (result < decimal.Zero)
{
result = decimal.Zero;
}
return(result);
}
/// <summary>
/// Validate discount
/// </summary>
/// <param name="discount">Discount</param>
/// <param name="customer">Customer</param>
/// <returns>Discount validation result</returns>
public virtual DiscountValidationResult ValidateDiscount(DiscountForCaching discount, Customer customer)
{
if (discount == null)
{
throw new ArgumentNullException("discount");
}
if (customer == null)
{
throw new ArgumentNullException("customer");
}
string[] couponCodesToValidate = customer.ParseAppliedDiscountCouponCodes();
return(ValidateDiscount(discount, customer, couponCodesToValidate));
}
/// <summary>
/// Validate discount
/// </summary>
/// <param name="discount">Discount</param>
/// <param name="customer">Customer</param>
/// <returns>Discount validation result</returns>
public virtual DiscountValidationResult ValidateDiscount(DiscountForCaching discount, Customer customer)
{
if (discount == null)
{
throw new ArgumentNullException(nameof(discount));
}
if (customer == null)
{
throw new ArgumentNullException(nameof(customer));
}
var couponCodesToValidate = _customerService.ParseAppliedDiscountCouponCodes(customer);
return(ValidateDiscount(discount, customer, couponCodesToValidate));
}
/// <summary>
/// Get category identifiers to which a discount is applied
/// </summary>
/// <param name="discount">Discount</param>
/// <param name="customer">Customer</param>
/// <returns>Category identifiers</returns>
public virtual IList <int> GetAppliedCategoryIds(DiscountForCaching discount, Customer customer)
{
if (discount == null)
{
throw new ArgumentNullException(nameof(discount));
}
var discountId = discount.Id;
var cacheKey = string.Format(NopDiscountDefaults.DiscountCategoryIdsModelCacheKey,
discountId,
string.Join(",", customer.GetCustomerRoleIds()),
_storeContext.CurrentStore.Id);
var result = _cacheManager.Get(cacheKey, () =>
{
var ids = new List <int>();
var rootCategoryIds = _discountRepository.Table.Where(x => x.Id == discountId)
.SelectMany(x => x.DiscountCategoryMappings.Select(mapping => mapping.CategoryId))
.ToList();
foreach (var categoryId in rootCategoryIds)
{
if (!ids.Contains(categoryId))
{
ids.Add(categoryId);
}
if (!discount.AppliedToSubCategories)
{
continue;
}
//include subcategories
foreach (var childCategoryId in _categoryService.GetChildCategoryIds(categoryId, _storeContext.CurrentStore.Id))
{
if (!ids.Contains(childCategoryId))
{
ids.Add(childCategoryId);
}
}
}
return(ids);
});
return(result);
}
/// <summary>
/// Get category identifiers to which a discount is applied
/// </summary>
/// <param name="discount">Discount</param>
/// <param name="customer">Customer</param>
/// <returns>Category identifiers</returns>
public virtual IList <string> GetAppliedCategoryIds(DiscountForCaching discount, Customer customer)
{
if (discount == null)
{
throw new ArgumentNullException(nameof(discount));
}
var discountId = discount.Id;
var cacheKey = string.Format(DiscountEventConsumer.DISCOUNT_CATEGORY_IDS_MODEL_KEY,
discountId,
string.Join(",", customer.GetCustomerRoleIds()),
0);
var result = _cacheManager.Get(cacheKey, () =>
{
var ids = new List <string>();
var rootCategoryIds = _discountRepository.Table.Where(x => x.Id == discountId)
.SelectMany(x => x.AppliedToCategories.Select(c => c.CategoryId))
.ToList();
foreach (var categoryId in rootCategoryIds)
{
if (!ids.Contains(categoryId))
{
ids.Add(categoryId);
}
if (discount.AppliedToSubCategories)
{
//include subcategories
foreach (var childCategoryId in _categoryService
.GetAllCategoriesByParentCategoryId(categoryId, false, true)
.Select(x => x.CategoryId))
{
if (!ids.Contains(childCategoryId))
{
ids.Add(childCategoryId);
}
}
}
}
return(ids);
});
return(result);
}
/// <summary>
/// Get manufacturer identifiers to which a discount is applied
/// </summary>
/// <param name="discount">Discount</param>
/// <param name="customer">Customer</param>
/// <returns>Manufacturer identifiers</returns>
public virtual IList <int> GetAppliedManufacturerIds(DiscountForCaching discount, Customer customer)
{
if (discount == null)
{
throw new ArgumentNullException(nameof(discount));
}
var discountId = discount.Id;
var cacheKey = string.Format(NopDiscountDefaults.DiscountManufacturerIdsModelCacheKey,
discountId,
string.Join(",", customer.GetCustomerRoleIds()),
_storeContext.CurrentStore.Id);
var result = _cacheManager.Get(cacheKey, () =>
{
return(_discountRepository.Table.Where(x => x.Id == discountId)
.SelectMany(x => x.DiscountManufacturerMappings.Select(mapping => mapping.ManufacturerId))
.ToList());
});
return(result);
}
/// <summary>
/// Get manufacturer identifiers to which a discount is applied
/// </summary>
/// <param name="discount">Discount</param>
/// <param name="customer">Customer</param>
/// <returns>Manufacturer identifiers</returns>
public virtual IList <int> GetAppliedManufacturerIds(DiscountForCaching discount, Customer customer)
{
if (discount == null)
{
throw new ArgumentNullException(nameof(discount));
}
var discountId = discount.Id;
var cacheKey = string.Format(DiscountEventConsumer.DISCOUNT_MANUFACTURER_IDS_MODEL_KEY,
discountId,
string.Join(",", customer.GetCustomerRoleIds()),
0);
var result = _cacheManager.Get(cacheKey, () =>
{
return(_discountRepository.Table.Where(x => x.Id == discountId)
.SelectMany(x => x.AppliedToManufacturers.Select(c => c.Id))
.ToList());
});
return(result);
}
/// <summary>
/// Get destination identifiers to which a discount is applied
/// </summary>
/// <param name="discount">Discount</param>
/// <param name="customer">Customer</param>
/// <returns>Destination identifiers</returns>
public virtual IList <int> GetAppliedDestinationIds(DiscountForCaching discount, Customer customer)
{
if (discount == null)
{
throw new ArgumentNullException("discount");
}
var discountId = discount.Id;
var cacheKey = string.Format(DiscountEventConsumer.DISCOUNT_DESTINATION_IDS_MODEL_KEY,
discountId,
string.Join(",", customer.GetCustomerRoleIds()),
_storeContext.CurrentStore.Id);
var result = _cacheManager.Get(cacheKey, () =>
{
return(_discountRepository.Table.Where(x => x.Id == discountId)
.SelectMany(x => x.AppliedToDestinations.Select(c => c.Id))
.ToList());
});
return(result);
}
/// <summary>
/// Check whether a list of discounts already contains a certain discount instance
/// </summary>
/// <param name="discounts">A list of discounts</param>
/// <param name="discount">Discount to check</param>
/// <returns>Result</returns>
public virtual bool ContainsDiscount(IList <DiscountForCaching> discounts, DiscountForCaching discount)
{
if (discounts == null)
{
throw new ArgumentNullException(nameof(discounts));
}
if (discount == null)
{
throw new ArgumentNullException(nameof(discount));
}
foreach (var dis1 in discounts)
{
if (discount.Id == dis1.Id)
{
return(true);
}
}
return(false);
}
/// <summary>
/// Check whether a list of discounts already contains a certain discount intance
/// </summary>
/// <param name="discounts">A list of discounts</param>
/// <param name="discount">Discount to check</param>
/// <returns>Result</returns>
public static bool ContainsDiscount(this IList <DiscountForCaching> discounts,
DiscountForCaching discount)
{
if (discounts == null)
{
throw new ArgumentNullException("discounts");
}
if (discount == null)
{
throw new ArgumentNullException("discount");
}
foreach (var dis1 in discounts)
{
if (discount.Id == dis1.Id)
{
return(true);
}
}
return(false);
}
/// <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(nameof(discount));
}
if (customer == null)
{
throw new ArgumentNullException(nameof(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
var now = DateTime.UtcNow;
if (discount.StartDateUtc.HasValue)
{
var 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)
{
var 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
var key = string.Format(NopDiscountDefaults.DiscountRequirementModelCacheKey, 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 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);
}
/// <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.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
string key = string.Format(DiscountEventConsumer.DISCOUNT_REQUIREMENT_MODEL_KEY, discount.Id);
var requirements = _cacheManager.Get(key, () =>
{
var cachedRequirements = new List <DiscountRequirementForCaching>();
foreach (var dr in GetAllDiscountRequirements(discount.Id))
{
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.AuthorizedForUser(requirementRulePlugin.PluginDescriptor, customer))
{
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);
}