feat: 管理端核心实体CRUD补齐

src/Application/TakeoutSaaS.Application/App/Deliveries/Handlers/GetDeliveryOrderByIdQueryHandler.cs

@@ -0,0 +1,60 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Deliveries.Dto;
+using TakeoutSaaS.Application.App.Deliveries.Queries;
+using TakeoutSaaS.Domain.Deliveries.Entities;
+using TakeoutSaaS.Domain.Deliveries.Repositories;
+using TakeoutSaaS.Shared.Abstractions.Tenancy;
+
+namespace TakeoutSaaS.Application.App.Deliveries.Handlers;
+
+/// <summary>
+/// 配送单详情查询处理器。
+/// </summary>
+public sealed class GetDeliveryOrderByIdQueryHandler(
+    IDeliveryRepository deliveryRepository,
+    ITenantProvider tenantProvider)
+    : IRequestHandler<GetDeliveryOrderByIdQuery, DeliveryOrderDto?>
+{
+    private readonly IDeliveryRepository _deliveryRepository = deliveryRepository;
+    private readonly ITenantProvider _tenantProvider = tenantProvider;
+
+    /// <inheritdoc />
+    public async Task<DeliveryOrderDto?> Handle(GetDeliveryOrderByIdQuery request, CancellationToken cancellationToken)
+    {
+        var tenantId = _tenantProvider.GetCurrentTenantId();
+        var order = await _deliveryRepository.FindByIdAsync(request.DeliveryOrderId, tenantId, cancellationToken);
+        if (order == null)
+        {
+            return null;
+        }
+
+        var events = await _deliveryRepository.GetEventsAsync(order.Id, tenantId, cancellationToken);
+        return MapToDto(order, events);
+    }
+
+    private static DeliveryOrderDto MapToDto(DeliveryOrder deliveryOrder, IReadOnlyList<DeliveryEvent> events) => new()
+    {
+        Id = deliveryOrder.Id,
+        TenantId = deliveryOrder.TenantId,
+        OrderId = deliveryOrder.OrderId,
+        Provider = deliveryOrder.Provider,
+        ProviderOrderId = deliveryOrder.ProviderOrderId,
+        Status = deliveryOrder.Status,
+        DeliveryFee = deliveryOrder.DeliveryFee,
+        CourierName = deliveryOrder.CourierName,
+        CourierPhone = deliveryOrder.CourierPhone,
+        DispatchedAt = deliveryOrder.DispatchedAt,
+        PickedUpAt = deliveryOrder.PickedUpAt,
+        DeliveredAt = deliveryOrder.DeliveredAt,
+        FailureReason = deliveryOrder.FailureReason,
+        Events = events.Select(x => new DeliveryEventDto
+        {
+            Id = x.Id,
+            DeliveryOrderId = x.DeliveryOrderId,
+            EventType = x.EventType,
+            Message = x.Message,
+            OccurredAt = x.OccurredAt,
+            Payload = x.Payload
+        }).ToList()
+    };
+}