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A custom promotion for giving discounts on bundle items.

Select a bundle and the items in the bundle will get the entered discount. Check "All Items Required" and the promotion will only be applied when all items are in the cart.

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namespace EPiServer.Reference.Commerce.Site.Features.Promotions
{
using System.ComponentModel.DataAnnotations;
using EPiServer.Commerce.Catalog.ContentTypes;
using EPiServer.Commerce.Marketing;
using EPiServer.Commerce.Marketing.DataAnnotations;
using EPiServer.Core;
using EPiServer.DataAnnotations;
/// <summary>
/// The <see cref="P:BuyBundleGetItemDiscount.Discount" /> will be applied to any SKUs that are part of the <see cref="P:BuyBundleGetItemDiscount.Bundle" />.
/// </summary>
[ContentType(GUID = "59631059-835F-436E-B164-AA43F31A93EF", GroupName = "entrypromotion", Order = 10900, DisplayName = "Buy bundle, get discount")]
[ImageUrl("Images/BuyFromCategoryGetItemDiscount.png")]
public class BuyBundleGetItemDiscount : EntryPromotion
{
/// <summary>
/// Gets or sets a value indicating whether [all items required].
/// </summary>
/// <value><c>true</c> if [all items required]; otherwise, <c>false</c>.</value>
[Display(Order = 20, Name = "All SKUs required to be applicable.")]
public virtual bool AllItemsRequired { get; set; }
/// <summary>
/// Gets or sets the Bundle. Any SKUs that belong to this bundle will get a discount.
/// </summary>
/// <value>The category.</value>
[AllowedTypes(typeof(BundleContent))]
[Display(Order = 10)]
[PromotionRegion("Condition")]
[UIHint("catalogentry")]
public virtual ContentReference Bundle { get; set; }
/// <summary>
/// Gets or sets the discount. The reward values that should be applied.
/// </summary>
/// <value>The discount.</value>
[Display(Order = 20)]
[PromotionRegion("Discount")]
public virtual MonetaryReward Discount { get; set; }
}
}
namespace EPiServer.Reference.Commerce.Site.Features.Promotions
{
using System;
using System.Collections.Generic;
using System.Linq;
using EPiServer.Commerce.Catalog.ContentTypes;
using EPiServer.Commerce.Catalog.Linking;
using EPiServer.Commerce.Marketing;
using EPiServer.Commerce.Marketing.Promotions;
using EPiServer.Commerce.Order;
using EPiServer.Commerce.Validation;
using EPiServer.Core;
using EPiServer.Framework.Localization;
using EPiServer.ServiceLocation;
/// <summary>
/// Class BuyBundleGetItemDiscountProcessor.
/// </summary>
/// <seealso cref="EPiServer.Commerce.Marketing.Promotions.GetItemDiscountProcessorBase{BuyBundleGetItemDiscount}" />
[ServiceConfiguration(Lifecycle = ServiceInstanceScope.Singleton)]
public class BuyBundleGetItemDiscountProcessor : GetItemDiscountProcessorBase<BuyBundleGetItemDiscount>
{
/// <summary>
/// The collection target evaluator
/// </summary>
private readonly CollectionTargetEvaluator collectionTargetEvaluator;
/// <summary>
/// The content loader
/// </summary>
private readonly IContentLoader contentLoader;
/// <summary>
/// Initializes a new instance of the <see cref="BuyBundleGetItemDiscountProcessor" /> class.
/// </summary>
/// <param name="collectionTargetEvaluator">The service that is used to evaluate the target properties.</param>
/// <param name="localizationService">The service that is used to handle localization.</param>
/// <param name="contentLoader">The content loader.</param>
public BuyBundleGetItemDiscountProcessor(
CollectionTargetEvaluator collectionTargetEvaluator,
LocalizationService localizationService,
IContentLoader contentLoader)
: base(
targetEvaluator: collectionTargetEvaluator,
localizationService: localizationService,
targetGetter: GetTargetItems,
discountGetter: x => x.Discount)
{
ParameterValidator.ThrowIfNull(() => collectionTargetEvaluator, value: collectionTargetEvaluator);
this.collectionTargetEvaluator = collectionTargetEvaluator;
this.contentLoader = contentLoader;
}
/// <summary>
/// Determines whether [contains all items] [the specified a].
/// </summary>
/// <param name="lineItemCodes">The line item codes.</param>
/// <param name="targetCodes">The target codes.</param>
/// <returns><c>true</c> if [contains all items] [the specified a]; otherwise, <c>false</c>.</returns>
protected static bool ContainsAllItems(IEnumerable<string> lineItemCodes, IEnumerable<string> targetCodes)
{
return !targetCodes.Except(second: lineItemCodes).Any();
}
/// <summary>
/// Gets the target items.
/// </summary>
/// <param name="promotionData">The promotion data.</param>
/// <returns>The DiscountItems.</returns>
protected static DiscountItems GetTargetItems(BuyBundleGetItemDiscount promotionData)
{
IEnumerable<ContentReference> entries = ListBundleEntries(referenceToBundle: promotionData.Bundle)
.Select(e => e.Child);
return new DiscountItems { Items = entries.ToList(), MatchRecursive = false };
}
/// <summary>
/// Lists the bundle entries.
/// </summary>
/// <param name="referenceToBundle">The reference to bundle.</param>
/// <returns>A list of <see cref="BundleEntry"/>.</returns>
protected static IEnumerable<BundleEntry> ListBundleEntries(ContentReference referenceToBundle)
{
IRelationRepository relationRepository = ServiceLocator.Current.GetInstance<IRelationRepository>();
// Relations to bundle entries are of type BundleEntry
List<BundleEntry> bundleEntries = relationRepository.GetChildren<BundleEntry>(parentLink: referenceToBundle)
.ToList();
return bundleEntries;
}
/// <summary>
/// Verify that the current promotion can potentially be fulfilled
/// </summary>
/// <param name="promotionData">The promotion to evaluate.</param>
/// <param name="context">The context for the promotion processor evaluation.</param>
/// <returns><c>true</c> if the current promotion can potentially be fulfilled; otherwise, <c>false</c>.</returns>
/// <remarks>This method is intended to be a very quick pre-check to avoid doing more expensive operations.
/// Used to verify basic things, for example a Buy-3-pay-for-2 promotion needs at least three items in the cart.
/// If we have less than three we can skip further processing.</remarks>
protected override bool CanBeFulfilled(
BuyBundleGetItemDiscount promotionData,
PromotionProcessorContext context)
{
if (base.CanBeFulfilled(promotion: promotionData, context: context))
{
return !ContentReference.IsNullOrEmpty(contentLink: promotionData.Bundle);
}
return false;
}
/// <summary>
/// Implements promotion specific logic for determining the fulfillment status of the promotion.
/// </summary>
/// <param name="promotionData">The promotion data.</param>
/// <param name="context">The context.</param>
/// <returns>The calculated fulfillment status as a <see cref="T:EPiServer.Commerce.Marketing.FulfillmentStatus" /> value.</returns>
protected override FulfillmentStatus GetFulfillmentStatus(
BuyBundleGetItemDiscount promotionData,
PromotionProcessorContext context)
{
IEnumerable<ILineItem> lineItems = context.OrderForm.GetAllLineItems().Where(item => !item.IsGift);
IEnumerable<ContentReference> targets = ListBundleEntries(referenceToBundle: promotionData.Bundle)
.Select(e => e.Child);
IList<string> applicableCodes;
if (promotionData.AllItemsRequired)
{
// If all SKUs are required to trigger the promotion, the applicable codes shoud not be filtered by the CollectionTargetEvaluator
applicableCodes = targets
.Select(
contentReference => this.contentLoader.Get<EntryContentBase>(contentLink: contentReference)
?.Code).Where(code => !string.IsNullOrWhiteSpace(value: code)).ToList();
}
else
{
applicableCodes = this.collectionTargetEvaluator.GetApplicableCodes(
lineItemsInOrder: lineItems,
targets: targets,
matchRecursive: false);
}
return this.GetStatusForBuyBundlePromotion(
codes: applicableCodes,
lineItems: lineItems,
matchAllItems: promotionData.AllItemsRequired);
}
/// <summary>
/// Gets information about the settings for a specific instance of a promotion type.
/// Used when displaying promotion information to a site visitor/shopper.
/// </summary>
/// <param name="promotionData">The promotion data to get items for.</param>
/// <returns>The promotion condition and reward items.</returns>
/// <remarks><para>
/// This method is intended to be used on a site to display information about a promotion to a visitor/shopper.
/// </para>
/// <para>
/// It is never used during the evaluation of the promotion, it only exists to provide information about the settings for this instance of a promotion type.
/// So a use case for this could be that you have a "Buy 3 get the cheapest for one for free" promotion. And you want to display information to the visitor/shopper
/// that "If you buy three items from the category cooking books, you will get the cheapest one for free".
/// </para>
/// <para>
/// This method should not be called explicitly from the site code, but will be called from the IPromotionEngine extension method GetPromotionItemsForCampaign.
/// </para></remarks>
protected override PromotionItems GetPromotionItems(BuyBundleGetItemDiscount promotionData)
{
IEnumerable<ContentReference> entries = ListBundleEntries(referenceToBundle: promotionData.Bundle)
.Select(e => e.Child);
CatalogItemSelection catalogItemSelection = new CatalogItemSelection(
items: entries,
type: CatalogItemSelectionType.Specific,
includesSubcategories: false);
return new PromotionItems(
promotion: promotionData,
condition: catalogItemSelection,
reward: catalogItemSelection);
}
/// <summary>
/// Gets all <see cref="T:EPiServer.Commerce.Marketing.AffectedEntries" />s affected by a given promotion.
/// </summary>
/// <param name="promotionData">The promotion used to evaluate the product codes.</param>
/// <param name="context">The context for the promotion processor evaluation.</param>
/// <param name="applicableCodes">A collection of product codes to be checked against a promotion.</param>
/// <returns>A list of applicable <see cref="T:EPiServer.Commerce.Marketing.RedemptionDescription" />s</returns>
protected override IEnumerable<RedemptionDescription> GetRedemptions(
BuyBundleGetItemDiscount promotionData,
PromotionProcessorContext context,
IEnumerable<string> applicableCodes)
{
List<RedemptionDescription> redemptionDescriptionList = new List<RedemptionDescription>();
decimal val2 = this.GetLineItems(orderForm: context.OrderForm)
.Where(li => applicableCodes.Contains(value: li.Code)).Sum(li => li.Quantity);
decimal num = Math.Min(this.GetMaxRedemptions(redemptions: promotionData.RedemptionLimits), val2: val2);
for (int index = 0; index < num; ++index)
{
AffectedEntries entries =
context.EntryPrices.ExtractEntries(codes: applicableCodes, quantity: decimal.One);
if (entries != null)
{
redemptionDescriptionList.Add(this.CreateRedemptionDescription(affectedEntries: entries));
}
}
return redemptionDescriptionList;
}
/// <summary>
/// Gets the fulfillment status using <paramref name="codes" /> for Buy from category get item discount promotion.
/// </summary>
/// <param name="codes">The codes for eligible products.</param>
/// <param name="lineItems">The line items in current order form.</param>
/// <param name="matchAllItems">if set to <c>true</c> [match all items].</param>
/// <returns>The fulfillment status.</returns>
protected FulfillmentStatus GetStatusForBuyBundlePromotion(
IEnumerable<string> codes,
IEnumerable<ILineItem> lineItems,
bool matchAllItems)
{
if (matchAllItems)
{
return !ContainsAllItems(lineItems.Select(l => l.Code), targetCodes: codes)
? FulfillmentStatus.NotFulfilled
: FulfillmentStatus.Fulfilled;
}
return !lineItems.Any(li => codes.Contains(value: li.Code))
? FulfillmentStatus.NotFulfilled
: FulfillmentStatus.Fulfilled;
}
}
}
namespace EPiServer.Reference.Commerce.Site.Features.Promotions
{
using System.Collections.Generic;
using EPiServer.Commerce.Validation;
using EPiServer.Core;
using EPiServer.Framework.Localization;
using EPiServer.Validation;
/// <summary>
/// Class BuyBundleGetItemDiscountValidator.
/// </summary>
/// <seealso cref="EPiServer.Commerce.Validation.PromotionDataValidatorBase{BuyBundleGetItemDiscount}" />
public class BuyBundleGetItemDiscountValidator : PromotionDataValidatorBase<BuyBundleGetItemDiscount>
{
/// <summary>
/// Initializes a new instance of the <see cref="BuyBundleGetItemDiscountValidator"/> class.
/// </summary>
/// <param name="localizationService">
/// The localization service.
/// </param>
public BuyBundleGetItemDiscountValidator(LocalizationService localizationService)
: base(localizationService: localizationService)
{
}
/// <summary>
/// Adds the errors if needed.
/// </summary>
/// <param name="promotionData">The promotion data.</param>
/// <param name="validationErrors">The validation errors.</param>
protected override void AddErrorsIfNeeded(
BuyBundleGetItemDiscount promotionData,
List<ValidationError> validationErrors)
{
if (!ContentReference.IsNullOrEmpty(contentLink: promotionData.Bundle))
{
return;
}
List<ValidationError> validationErrorList = validationErrors;
ValidationError validationError = new ValidationError();
validationError.Severity = ValidationErrorSeverity.Error;
validationError.ValidationType = ValidationErrorType.StorageValidation;
validationError.PropertyName = "Bundle";
string str = this.LocalizationService.GetString("/commerce/validation/buyfrombundlerequired");
validationError.ErrorMessage = str;
validationErrorList.Add(item: validationError);
}
}
}
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