feat: 管理端核心实体CRUD补齐

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

@@ -0,0 +1,156 @@
+using MediatR;
+using Microsoft.Extensions.Logging;
+using TakeoutSaaS.Application.App.Orders.Commands;
+using TakeoutSaaS.Application.App.Orders.Dto;
+using TakeoutSaaS.Domain.Orders.Entities;
+using TakeoutSaaS.Domain.Orders.Repositories;
+using TakeoutSaaS.Shared.Abstractions.Ids;
+
+namespace TakeoutSaaS.Application.App.Orders.Handlers;
+
+/// <summary>
+/// 创建订单命令处理器。
+/// </summary>
+public sealed class CreateOrderCommandHandler(
+    IOrderRepository orderRepository,
+    IIdGenerator idGenerator,
+    ILogger<CreateOrderCommandHandler> logger)
+    : IRequestHandler<CreateOrderCommand, OrderDto>
+{
+    private readonly IOrderRepository _orderRepository = orderRepository;
+    private readonly IIdGenerator _idGenerator = idGenerator;
+    private readonly ILogger<CreateOrderCommandHandler> _logger = logger;
+
+    /// <inheritdoc />
+    public async Task<OrderDto> Handle(CreateOrderCommand request, CancellationToken cancellationToken)
+    {
+        // 1. 构建订单
+        var order = new Order
+        {
+            Id = _idGenerator.NextId(),
+            OrderNo = request.OrderNo.Trim(),
+            StoreId = request.StoreId,
+            Channel = request.Channel,
+            DeliveryType = request.DeliveryType,
+            Status = request.Status,
+            PaymentStatus = request.PaymentStatus,
+            CustomerName = request.CustomerName?.Trim(),
+            CustomerPhone = request.CustomerPhone?.Trim(),
+            TableNo = request.TableNo?.Trim(),
+            QueueNumber = request.QueueNumber?.Trim(),
+            ReservationId = request.ReservationId,
+            ItemsAmount = request.ItemsAmount,
+            DiscountAmount = request.DiscountAmount,
+            PayableAmount = request.PayableAmount,
+            PaidAmount = request.PaidAmount,
+            PaidAt = request.PaidAt,
+            FinishedAt = request.FinishedAt,
+            CancelledAt = request.CancelledAt,
+            CancelReason = request.CancelReason?.Trim(),
+            Remark = request.Remark?.Trim()
+        };
+
+        // 2. 构建明细
+        var items = request.Items.Select(item => new OrderItem
+        {
+            OrderId = order.Id,
+            ProductId = item.ProductId,
+            ProductName = item.ProductName.Trim(),
+            SkuName = item.SkuName?.Trim(),
+            Unit = item.Unit?.Trim(),
+            Quantity = item.Quantity,
+            UnitPrice = item.UnitPrice,
+            DiscountAmount = item.DiscountAmount,
+            SubTotal = item.SubTotal,
+            AttributesJson = item.AttributesJson?.Trim()
+        }).ToList();
+
+        // 3. 补充金额字段
+        if (items.Count > 0)
+        {
+            var itemsAmount = items.Sum(x => x.SubTotal);
+            order.ItemsAmount = itemsAmount;
+            if (order.PayableAmount <= 0)
+            {
+                order.PayableAmount = itemsAmount - order.DiscountAmount;
+            }
+        }
+
+        // 4. 持久化
+        await _orderRepository.AddOrderAsync(order, cancellationToken);
+        if (items.Count > 0)
+        {
+            await _orderRepository.AddItemsAsync(items, cancellationToken);
+        }
+        await _orderRepository.SaveChangesAsync(cancellationToken);
+        _logger.LogInformation("创建订单 {OrderNo} ({OrderId})", order.OrderNo, order.Id);
+
+        // 5. 返回 DTO
+        return MapToDto(order, items, [], []);
+    }
+
+    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()
+        };
+}