Auto cancel and refund order in case of insufficient inventory

modules/EasyAbp.EShop.Orders/src/EasyAbp.EShop.Orders.Domain.Shared/EasyAbp/EShop/Orders/OrdersConsts.cs

@@ -3,5 +3,6 @@
     public static class OrdersConsts
     {
         public static string UnpaidAutoCancellationReason = "Order payment timed out and not paid";
+        public static string InventoryReductionFailedAutoCancellationReason = "Insufficient inventory";
     }
 }

modules/EasyAbp.EShop.Orders/src/EasyAbp.EShop.Orders.Domain/EasyAbp/EShop/Orders/Orders/ProductInventoryReductionEventHandler.cs

@@ -1,6 +1,12 @@
-using System.Threading.Tasks;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using EasyAbp.EShop.Payments.Refunds;
 using EasyAbp.EShop.Products.Products;
+using EasyAbp.PaymentService.Refunds;
+using Volo.Abp.Data;
 using Volo.Abp.DependencyInjection;
+using Volo.Abp.EventBus.Distributed;
 using Volo.Abp.MultiTenancy;
 using Volo.Abp.Timing;
 using Volo.Abp.Uow;
@@ -11,18 +17,24 @@ namespace EasyAbp.EShop.Orders.Orders
     {
         private readonly IClock _clock;
         private readonly ICurrentTenant _currentTenant;
+        private readonly IOrderManager _orderManager;
         private readonly IOrderRepository _orderRepository;
+        private readonly IDistributedEventBus _distributedEventBus;
 
         public ProductInventoryReductionEventHandler(
             IClock clock,
             ICurrentTenant currentTenant,
-            IOrderRepository orderRepository)
+            IOrderManager orderManager,
+            IOrderRepository orderRepository,
+            IDistributedEventBus distributedEventBus)
         {
             _clock = clock;
             _currentTenant = currentTenant;
+            _orderManager = orderManager;
             _orderRepository = orderRepository;
+            _distributedEventBus = distributedEventBus;
         }
-        
+
         [UnitOfWork(true)]
         public virtual async Task HandleEventAsync(ProductInventoryReductionAfterOrderPlacedResultEto eventData)
         {
@@ -37,10 +49,11 @@ namespace EasyAbp.EShop.Orders.Orders
 
                 if (!eventData.IsSuccess)
                 {
-                    // Todo: Cancel order.
+                    await _orderManager.CancelAsync(order, OrdersConsts.InventoryReductionFailedAutoCancellationReason);
+
                     return;
                 }
-            
+
                 order.SetReducedInventoryAfterPlacingTime(_clock.Now);
 
                 await _orderRepository.UpdateAsync(order, true);
@@ -61,15 +74,58 @@ namespace EasyAbp.EShop.Orders.Orders
 
                 if (!eventData.IsSuccess)
                 {
-                    // Todo: Refund.
+                    var refundOrderEto = CreateRefundOrderEto(order);
-                    // Todo: Cancel order.
+
+                    await _orderManager.CancelAsync(order, OrdersConsts.InventoryReductionFailedAutoCancellationReason);
+
+                    await RefundOrderAsync(refundOrderEto);
+
                     return;
                 }
-            
+
                 order.SetReducedInventoryAfterPaymentTime(_clock.Now);
 
                 await _orderRepository.UpdateAsync(order, true);
             }
         }
+
+        [UnitOfWork(true)]
+        protected virtual async Task RefundOrderAsync(RefundOrderEto refundOrderEto)
+        {
+            await _distributedEventBus.PublishAsync(refundOrderEto);
+        }
+
+        protected virtual RefundOrderEto CreateRefundOrderEto(Order order)
+        {
+            if (!order.PaymentId.HasValue)
+            {
+                throw new OrderIsInWrongStageException(order.Id);
+            }
+
+            var eto = new RefundOrderEto(
+                order.TenantId,
+                order.Id,
+                order.StoreId,
+                order.PaymentId.Value,
+                OrdersConsts.InventoryReductionFailedAutoCancellationReason,
+                OrdersConsts.InventoryReductionFailedAutoCancellationReason,
+                OrdersConsts.InventoryReductionFailedAutoCancellationReason);
+            
+            eto.OrderLines.AddRange(order.OrderLines.Select(x => new OrderLineRefundInfoModel
+            {
+                OrderLineId = x.Id,
+                Quantity = x.Quantity - x.RefundedQuantity,
+                TotalAmount = x.ActualTotalPrice - x.RefundAmount
+            }));
+            
+            eto.OrderExtraFees.AddRange(order.OrderExtraFees.Select(x => new OrderExtraFeeRefundInfoModel
+            {
+                Name = x.Name,
+                Key = x.Key,
+                TotalAmount = x.Fee - x.RefundAmount
+            }));
+
+            return eto;
+        }
     }
 }

modules/EasyAbp.EShop.Payments/src/EasyAbp.EShop.Payments.Application.Contracts/EasyAbp/EShop/Payments/Refunds/Dtos/CreateEShopRefundItemInput.cs

@@ -1,23 +1,9 @@
 using System;
-using System.Collections.Generic;
-using JetBrains.Annotations;
-using Volo.Abp.ObjectExtending;
 
 namespace EasyAbp.EShop.Payments.Refunds.Dtos
 {
     [Serializable]
-    public class CreateEShopRefundItemInput : ExtensibleObject
+    public class CreateEShopRefundItemInput : CreateEShopRefundItemInfoModel
     {
-        public Guid OrderId { get; set; }
-        
-        [CanBeNull]
-        public string CustomerRemark { get; set; }
-        
-        [CanBeNull]
-        public string StaffRemark { get; set; }
-        
-        public List<OrderLineRefundInfoModel> OrderLines { get; set; } = new();
-        
-        public List<OrderExtraFeeRefundInfoModel> OrderExtraFees { get; set; } = new();
     }
 }

modules/EasyAbp.EShop.Payments/src/EasyAbp.EShop.Payments.Domain.Shared/EasyAbp/EShop/Payments/Refunds/CreateEShopRefundItemInfoModel.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using JetBrains.Annotations;
+using Volo.Abp.ObjectExtending;
+
+namespace EasyAbp.EShop.Payments.Refunds;
+
+[Serializable]
+public class CreateEShopRefundItemInfoModel : ExtensibleObject
+{
+    public Guid OrderId { get; set; }
+
+    [CanBeNull]
+    public string CustomerRemark { get; set; }
+
+    [CanBeNull]
+    public string StaffRemark { get; set; }
+
+    public List<OrderLineRefundInfoModel> OrderLines { get; set; } = new();
+
+    public List<OrderExtraFeeRefundInfoModel> OrderExtraFees { get; set; } = new();
+}

modules/EasyAbp.EShop.Payments/src/EasyAbp.EShop.Payments.Domain.Shared/EasyAbp/EShop/Payments/Refunds/RefundOrderEto.cs

@@ -0,0 +1,34 @@
+using System;
+using JetBrains.Annotations;
+using Volo.Abp.MultiTenancy;
+
+namespace EasyAbp.EShop.Payments.Refunds;
+
+[Serializable]
+public class RefundOrderEto : CreateEShopRefundItemInfoModel, IMultiTenant
+{
+    public Guid? TenantId { get; set; }
+
+    public Guid StoreId { get; set; }
+
+    public Guid PaymentId { get; set; }
+
+    [CanBeNull]
+    public string DisplayReason { get; set; }
+
+    protected RefundOrderEto()
+    {
+    }
+
+    public RefundOrderEto(Guid? tenantId, Guid orderId, Guid storeId, Guid paymentId, [CanBeNull] string displayReason,
+        [CanBeNull] string customerRemark, [CanBeNull] string staffRemark)
+    {
+        TenantId = tenantId;
+        OrderId = orderId;
+        StoreId = storeId;
+        PaymentId = paymentId;
+        DisplayReason = displayReason;
+        CustomerRemark = customerRemark;
+        StaffRemark = staffRemark;
+    }
+}

modules/EasyAbp.EShop.Payments/src/EasyAbp.EShop.Payments.Domain/EasyAbp/EShop/Payments/Refunds/RefundOrderEventHandler.cs

@@ -0,0 +1,65 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using EasyAbp.EShop.Payments.Payments;
+using EasyAbp.PaymentService.Payments;
+using EasyAbp.PaymentService.Refunds;
+using Volo.Abp.Data;
+using Volo.Abp.DependencyInjection;
+using Volo.Abp.EventBus.Distributed;
+using Volo.Abp.Json;
+
+namespace EasyAbp.EShop.Payments.Refunds;
+
+public class RefundOrderEventHandler : IDistributedEventHandler<RefundOrderEto>, ITransientDependency
+{
+    private readonly IJsonSerializer _jsonSerializer;
+    private readonly IPaymentRepository _paymentRepository;
+    private readonly IDistributedEventBus _distributedEventBus;
+
+    public RefundOrderEventHandler(
+        IJsonSerializer jsonSerializer,
+        IPaymentRepository paymentRepository,
+        IDistributedEventBus distributedEventBus)
+    {
+        _jsonSerializer = jsonSerializer;
+        _paymentRepository = paymentRepository;
+        _distributedEventBus = distributedEventBus;
+    }
+
+    public virtual async Task HandleEventAsync(RefundOrderEto eventData)
+    {
+        var refundAmount = eventData.OrderLines.Sum(x => x.TotalAmount) +
+                           eventData.OrderExtraFees.Sum(x => x.TotalAmount);
+
+        var payment = await _paymentRepository.GetAsync(eventData.PaymentId);
+
+        var paymentItem = payment.PaymentItems.Single(x => x.ItemKey == eventData.OrderId.ToString());
+
+        var createRefundItemInput = new CreateRefundItemInput
+        {
+            PaymentItemId = paymentItem.Id,
+            RefundAmount = refundAmount,
+            CustomerRemark = eventData.CustomerRemark,
+            StaffRemark = eventData.StaffRemark
+        };
+
+        createRefundItemInput.SetProperty(nameof(RefundItem.StoreId), eventData.StoreId);
+        createRefundItemInput.SetProperty(nameof(RefundItem.OrderId), eventData.OrderId);
+        createRefundItemInput.SetProperty(nameof(RefundItem.OrderLines),
+            _jsonSerializer.Serialize(eventData.OrderLines));
+        createRefundItemInput.SetProperty(nameof(RefundItem.OrderExtraFees),
+            _jsonSerializer.Serialize(eventData.OrderExtraFees));
+
+        var eto = new RefundPaymentEto(eventData.TenantId, new CreateRefundInput
+        {
+            PaymentId = eventData.PaymentId,
+            DisplayReason = eventData.DisplayReason,
+            CustomerRemark = eventData.CustomerRemark,
+            StaffRemark = eventData.StaffRemark,
+            RefundItems = new List<CreateRefundItemInput> { createRefundItemInput }
+        });
+
+        await _distributedEventBus.PublishAsync(eto);
+    }
+}