feat: 管理端核心实体CRUD补齐

src/Application/TakeoutSaaS.Application/App/Orders/Handlers/GetOrderByIdQueryHandler.cs

@@ -0,0 +1,102 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Orders.Dto;
+using TakeoutSaaS.Application.App.Orders.Queries;
+using TakeoutSaaS.Domain.Orders.Entities;
+using TakeoutSaaS.Domain.Orders.Repositories;
+using TakeoutSaaS.Shared.Abstractions.Tenancy;
+
+namespace TakeoutSaaS.Application.App.Orders.Handlers;
+
+/// <summary>
+/// 订单详情查询处理器。
+/// </summary>
+public sealed class GetOrderByIdQueryHandler(
+    IOrderRepository orderRepository,
+    ITenantProvider tenantProvider)
+    : IRequestHandler<GetOrderByIdQuery, OrderDto?>
+{
+    private readonly IOrderRepository _orderRepository = orderRepository;
+    private readonly ITenantProvider _tenantProvider = tenantProvider;
+
+    /// <inheritdoc />
+    public async Task<OrderDto?> Handle(GetOrderByIdQuery request, CancellationToken cancellationToken)
+    {
+        var tenantId = _tenantProvider.GetCurrentTenantId();
+        var order = await _orderRepository.FindByIdAsync(request.OrderId, tenantId, cancellationToken);
+        if (order == null)
+        {
+            return null;
+        }
+
+        var items = await _orderRepository.GetItemsAsync(order.Id, tenantId, cancellationToken);
+        var histories = await _orderRepository.GetStatusHistoryAsync(order.Id, tenantId, cancellationToken);
+        var refunds = await _orderRepository.GetRefundsAsync(order.Id, tenantId, cancellationToken);
+
+        return MapToDto(order, items, histories, refunds);
+    }
+
+    private static OrderDto MapToDto(
+        Order order,
+        IReadOnlyList<OrderItem> items,
+        IReadOnlyList<OrderStatusHistory> histories,
+        IReadOnlyList<RefundRequest> refunds) => new()
+        {
+            Id = order.Id,
+            TenantId = order.TenantId,
+            OrderNo = order.OrderNo,
+            StoreId = order.StoreId,
+            Channel = order.Channel,
+            DeliveryType = order.DeliveryType,
+            Status = order.Status,
+            PaymentStatus = order.PaymentStatus,
+            CustomerName = order.CustomerName,
+            CustomerPhone = order.CustomerPhone,
+            TableNo = order.TableNo,
+            QueueNumber = order.QueueNumber,
+            ReservationId = order.ReservationId,
+            ItemsAmount = order.ItemsAmount,
+            DiscountAmount = order.DiscountAmount,
+            PayableAmount = order.PayableAmount,
+            PaidAmount = order.PaidAmount,
+            PaidAt = order.PaidAt,
+            FinishedAt = order.FinishedAt,
+            CancelledAt = order.CancelledAt,
+            CancelReason = order.CancelReason,
+            Remark = order.Remark,
+            Items = items.Select(x => new OrderItemDto
+            {
+                Id = x.Id,
+                OrderId = x.OrderId,
+                ProductId = x.ProductId,
+                ProductName = x.ProductName,
+                SkuName = x.SkuName,
+                Unit = x.Unit,
+                Quantity = x.Quantity,
+                UnitPrice = x.UnitPrice,
+                DiscountAmount = x.DiscountAmount,
+                SubTotal = x.SubTotal,
+                AttributesJson = x.AttributesJson
+            }).ToList(),
+            StatusHistory = histories.Select(x => new OrderStatusHistoryDto
+            {
+                Id = x.Id,
+                OrderId = x.OrderId,
+                Status = x.Status,
+                OperatorId = x.OperatorId,
+                Notes = x.Notes,
+                OccurredAt = x.OccurredAt
+            }).ToList(),
+            Refunds = refunds.Select(x => new RefundRequestDto
+            {
+                Id = x.Id,
+                OrderId = x.OrderId,
+                RefundNo = x.RefundNo,
+                Amount = x.Amount,
+                Reason = x.Reason,
+                Status = x.Status,
+                RequestedAt = x.RequestedAt,
+                ProcessedAt = x.ProcessedAt,
+                ReviewNotes = x.ReviewNotes
+            }).ToList()
+        };
+}