Inventory auto rollback

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain/EasyAbp/EShop/Products/EShopProductsDomainModule.cs

@@ -13,6 +13,7 @@ namespace EasyAbp.EShop.Products
 {
     [DependsOn(
         typeof(EShopProductsDomainSharedModule),
+        typeof(AbpAutoMapperModule),
         typeof(AbpCachingModule),
         typeof(AbpTreesDomainModule)
     )]

modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain/EasyAbp/EShop/Products/Products/InventoryRollbackOrderCanceledEventHandler.cs

@@ -0,0 +1,47 @@
+using System.Linq;
+using System.Threading.Tasks;
+using EasyAbp.EShop.Orders.Orders;
+using Volo.Abp.DependencyInjection;
+using Volo.Abp.EventBus.Distributed;
+using Volo.Abp.Uow;
+
+namespace EasyAbp.EShop.Products.Products
+{
+    // see: https://github.com/EasyAbp/EShop/issues/139
+    public class InventoryRollbackOrderCanceledEventHandler : IDistributedEventHandler<OrderCanceledEto>, ITransientDependency
+    {
+        private readonly IProductManager _productManager;
+        private readonly IProductRepository _productRepository;
+
+        public InventoryRollbackOrderCanceledEventHandler(
+            IProductManager productManager,
+            IProductRepository productRepository)
+        {
+            _productManager = productManager;
+            _productRepository = productRepository;
+        }
+        
+        [UnitOfWork(true)]
+        public virtual async Task HandleEventAsync(OrderCanceledEto eventData)
+        {
+            if (eventData.Order.PaidTime.HasValue)
+            {
+                return;
+            }
+            
+            foreach (var orderLine in eventData.Order.OrderLines)
+            {
+                var product = await _productRepository.GetAsync(orderLine.ProductId);
+
+                if (product.InventoryStrategy is InventoryStrategy.NoNeed or InventoryStrategy.ReduceAfterPayment)
+                {
+                    continue;
+                }
+
+                var productSku = product.ProductSkus.Single(x => x.Id == orderLine.ProductSkuId);
+
+                await _productManager.TryIncreaseInventoryAsync(product, productSku, orderLine.Quantity, true);
+            }
+        }
+    }
+}

modules/EasyAbp.EShop.Products/test/EasyAbp.EShop.Products.Domain.Tests/Products/InventoryRollbackTests.cs

@@ -0,0 +1,150 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using EasyAbp.EShop.Orders.Orders;
+using Microsoft.Extensions.DependencyInjection;
+using Shouldly;
+using Xunit;
+
+namespace EasyAbp.EShop.Products.Products
+{
+    public class InventoryRollbackTests : ProductsDomainTestBase
+    {
+        private InventoryRollbackOrderCanceledEventHandler EventHandler { get; }
+        private IProductRepository ProductRepository { get; }
+        private IProductManager ProductManager { get; }
+        
+        public InventoryRollbackTests()
+        {
+            EventHandler = ServiceProvider.GetRequiredService<InventoryRollbackOrderCanceledEventHandler>();
+            ProductRepository = ServiceProvider.GetRequiredService<IProductRepository>();
+            ProductManager = ServiceProvider.GetRequiredService<IProductManager>();
+        }
+        
+        [Fact]
+        public async Task Should_Roll_Back_ReduceAfterPlacing_Inventory_If_Order_Is_Not_Paid()
+        {
+            await TestAsync(InventoryStrategy.ReduceAfterPlacing, false, true);
+        }
+
+        [Fact]
+        public async Task Should_Not_Roll_Back_ReduceAfterPlacing_Inventory_If_Order_Is_Paid()
+        {
+            await TestAsync(InventoryStrategy.ReduceAfterPlacing, true, false);
+        }
+
+        [Fact]
+        public async Task Should_Not_Roll_Back_ReduceAfterPayment_Inventory_If_Order_Is_Not_Paid()
+        {
+            await TestAsync(InventoryStrategy.ReduceAfterPayment, false, false);
+        }
+
+        [Fact]
+        public async Task Should_Not_Roll_Back_ReduceAfterPayment_Inventory_If_Order_Is_Paid()
+        {
+            await TestAsync(InventoryStrategy.ReduceAfterPayment, true, false);
+        }
+
+        [Fact]
+        public async Task Should_Not_Roll_Back_NoNeed_Inventory_If_Order_Is_Not_Paid()
+        {
+            await TestAsync(InventoryStrategy.NoNeed, false, false);
+        }
+
+        [Fact]
+        public async Task Should_Not_Roll_Back_NoNeed_Inventory_If_Order_Is_Paid()
+        {
+            await TestAsync(InventoryStrategy.NoNeed, true, false);
+        }
+
+        protected async Task TestAsync(InventoryStrategy inventoryStrategy, bool orderPaid, bool expectRollback)
+        {
+            var product = await ProductRepository.GetAsync(ProductsTestData.Product1Id);
+            var productSku = product.ProductSkus.Single(x => x.Id == ProductsTestData.Product1Sku1Id);
+
+            typeof(Product).GetProperty("InventoryStrategy")!.SetValue(product, inventoryStrategy);
+            
+            await ProductRepository.UpdateAsync(product, true);
+
+            (await ProductManager.TryIncreaseInventoryAsync(product, productSku, 3, false)).ShouldBeTrue();
+            (await ProductManager.TryReduceInventoryAsync(product, productSku, 3, true)).ShouldBeTrue();
+
+            var inventoryDataModel = await ProductManager.GetInventoryDataAsync(product, productSku);
+            
+            inventoryDataModel.Inventory.ShouldBe(0);
+
+            await EventHandler.HandleEventAsync(new OrderCanceledEto(
+                new OrderEto
+                {
+                    #region properties
+
+                    Id = Guid.NewGuid(),
+                    TenantId = null,
+                    StoreId = ProductsTestData.Store1Id,
+                    OrderNumber = null,
+                    CustomerUserId = Guid.NewGuid(),
+                    OrderStatus = OrderStatus.Processing,
+                    Currency = null,
+                    ProductTotalPrice = 0,
+                    TotalDiscount = 0,
+                    TotalPrice = 0,
+                    ActualTotalPrice = 0,
+                    RefundAmount = 0,
+                    CustomerRemark = null,
+                    StaffRemark = null,
+                    PaymentId = orderPaid ? Guid.NewGuid() : null,
+                    PaidTime = orderPaid ? DateTime.Now : null,
+                    CompletionTime = null,
+                    CanceledTime = null,
+                    CancellationReason = null,
+                    ReducedInventoryAfterPlacingTime = null,
+                    ReducedInventoryAfterPaymentTime = null,
+                    PaymentExpiration = null,
+                    OrderLines = new List<OrderLineEto>
+                    {
+                        new()
+                        {
+                            Id = Guid.NewGuid(),
+                            ProductId = product.Id,
+                            ProductSkuId = productSku.Id,
+                            ProductModificationTime = default,
+                            ProductDetailModificationTime = default,
+                            ProductGroupName = null,
+                            ProductGroupDisplayName = null,
+                            ProductUniqueName = null,
+                            ProductDisplayName = null,
+                            SkuName = null,
+                            SkuDescription = null,
+                            MediaResources = null,
+                            Currency = null,
+                            UnitPrice = 0,
+                            TotalPrice = 0,
+                            TotalDiscount = 0,
+                            ActualTotalPrice = 0,
+                            Quantity = 3,
+                            RefundedQuantity = 0,
+                            RefundAmount = 0
+                        }
+                    },
+                    CreationTime = default,
+                    CreatorId = null,
+                    LastModificationTime = null,
+                    LastModifierId = null,
+                    IsDeleted = false,
+                    DeletionTime = null,
+                    DeleterId = null
+
+                    #endregion
+                }
+            ));
+
+            product = await ProductRepository.GetAsync(ProductsTestData.Product1Id);
+            productSku = product.ProductSkus.Single(x => x.Id == ProductsTestData.Product1Sku1Id);
+
+            inventoryDataModel = await ProductManager.GetInventoryDataAsync(product, productSku);
+            
+            inventoryDataModel.Inventory.ShouldBe(expectRollback ? 3 : 0);
+        }
+    }
+}