Add `RuleData` in OrderDiscountPreviewInfoModel

common.props

@@ -1,7 +1,7 @@
 <Project>
   <PropertyGroup>
     <LangVersion>latest</LangVersion>
-    <Version>4.0.0-preview.1</Version>
+    <Version>4.0.0-preview.2</Version>
     <NoWarn>$(NoWarn);CS1591</NoWarn>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <Authors>EasyAbp Team</Authors>

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain.Shared/EasyAbp/EShop/Products/Products/OrderDiscountPreviewInfoModel.cs

@@ -6,19 +6,28 @@ namespace EasyAbp.EShop.Products.Products;
 [Serializable]
 public class OrderDiscountPreviewInfoModel : DiscountInfoModel, ICloneable
 {
+    /// <summary>
+    /// This property can be used as an additional rule explanation for the UI.
+    /// For example, <c>2,rate,0.1</c> could mean 10% off while the quantity of order line >= 2.
+    /// UI cannot always calculate the discount amount correctly, but if you need to, this property can help.
+    /// </summary>
+    [CanBeNull]
+    public string RuleData { get; }
+
     public OrderDiscountPreviewInfoModel()
     {
     }
 
     public OrderDiscountPreviewInfoModel([CanBeNull] string effectGroup, [NotNull] string name, [CanBeNull] string key,
-        [CanBeNull] string displayName, DateTime? fromTime, DateTime? toTime) : base(effectGroup, name, key,
-        displayName, fromTime, toTime)
+        [CanBeNull] string displayName, DateTime? fromTime, DateTime? toTime, [CanBeNull] string ruleData) : base(
+        effectGroup, name, key, displayName, fromTime, toTime)
     {
+        RuleData = ruleData;
     }
 
     public virtual object Clone()
     {
-        return new OrderDiscountPreviewInfoModel(EffectGroup, Name, Key, DisplayName, FromTime, ToTime);
+        return new OrderDiscountPreviewInfoModel(EffectGroup, Name, Key, DisplayName, FromTime, ToTime, RuleData);
     }
 
     public override bool Equals(object obj)
@@ -33,7 +42,8 @@ public class OrderDiscountPreviewInfoModel : DiscountInfoModel, ICloneable
                Key == other.Key &&
                DisplayName == other.DisplayName &&
                Nullable.Equals(FromTime, other.FromTime) &&
-               Nullable.Equals(ToTime, other.ToTime);
+               Nullable.Equals(ToTime, other.ToTime) &&
+               RuleData == other.RuleData;
     }
 
     public override int GetHashCode()
@@ -46,6 +56,7 @@ public class OrderDiscountPreviewInfoModel : DiscountInfoModel, ICloneable
             hashCode = (hashCode * 397) ^ (DisplayName != null ? DisplayName.GetHashCode() : 0);
             hashCode = (hashCode * 397) ^ FromTime.GetHashCode();
             hashCode = (hashCode * 397) ^ ToTime.GetHashCode();
+            hashCode = (hashCode * 397) ^ (RuleData != null ? RuleData.GetHashCode() : 0);
             return hashCode;
         }
     }

modules/EasyAbp.EShop.Products/test/EasyAbp.EShop.Products.Application.Tests/Products/DemoProductDiscountProvider.cs

@@ -57,8 +57,8 @@ public class DemoProductDiscountProvider : IProductDiscountProvider
 
         var orderDiscountPreviewInfoModels = new List<OrderDiscountPreviewInfoModel>
         {
-            new(null, "DemoDiscount", "1", "Demo Discount 1", null, null),
-            new(null, "DemoDiscount", "2", "Demo Discount 2", _clock.Now.AddDays(-1), _clock.Now.AddDays(1)),
+            new(null, "DemoDiscount", "1", "Demo Discount 1", null, null, null),
+            new(null, "DemoDiscount", "2", "Demo Discount 2", _clock.Now.AddDays(-1), _clock.Now.AddDays(1), null),
         };
 
         foreach (var model in orderDiscountPreviewInfoModels)

plugins/Promotions/src/EasyAbp.EShop.Plugins.Promotions.Domain/EasyAbp/EShop/Plugins/Promotions/PromotionTypes/MinQuantityOrderDiscount/MinQuantityOrderDiscountPromotionHandler.cs

@@ -17,10 +17,15 @@ public class MinQuantityOrderDiscountPromotionHandler : PromotionHandlerBase, IS
     {
     }
 
-    public override Task HandleProductAsync(ProductDiscountContext context, Promotion promotion)
+    public override async Task HandleProductAsync(ProductDiscountContext context, Promotion promotion)
     {
         foreach (var discountModel in GetConfigurations<MinQuantityOrderDiscountConfigurations>(promotion).Discounts)
         {
+            if (context.ProductSku.Currency != discountModel.DynamicDiscountAmount.Currency)
+            {
+                continue;
+            }
+
             if (!discountModel.IsInScope(context.Product.ProductGroupName, context.Product.Id, context.ProductSku.Id))
             {
                 continue;
@@ -28,12 +33,16 @@ public class MinQuantityOrderDiscountPromotionHandler : PromotionHandlerBase, IS
 
             var newDiscount = new OrderDiscountPreviewInfoModel(PromotionConsts.PromotionEffectGroup,
                 PromotionConsts.PromotionDiscountName, promotion.UniqueName, promotion.DisplayName, promotion.FromTime,
-                promotion.ToTime);
+                promotion.ToTime, await CreateOrderDiscountPreviewRuleDataAsync(discountModel, context, promotion));
 
             context.OrderDiscountPreviews.Add(newDiscount);
         }
+    }
 
-        return Task.CompletedTask;
+    protected virtual Task<string?> CreateOrderDiscountPreviewRuleDataAsync(MinQuantityOrderDiscountModel discountModel,
+        ProductDiscountContext context, Promotion promotion)
+    {
+        return Task.FromResult<string?>(null);
     }
 
     public override Task HandleOrderAsync(OrderDiscountContext context, Promotion promotion)