feat: 增加分页排序与FluentValidation

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

@@ -23,7 +23,13 @@ public sealed class SearchDeliveryOrdersQueryHandler(
         var tenantId = _tenantProvider.GetCurrentTenantId();
         var orders = await _deliveryRepository.SearchAsync(tenantId, request.Status, request.OrderId, cancellationToken);
 
-        return orders.Select(order => new DeliveryOrderDto
+        var sorted = ApplySorting(orders, request.SortBy, request.SortDescending);
+        var paged = sorted
+            .Skip((request.Page - 1) * request.PageSize)
+            .Take(request.PageSize)
+            .ToList();
+
+        return paged.Select(order => new DeliveryOrderDto
         {
             Id = order.Id,
             TenantId = order.TenantId,
@@ -37,7 +43,21 @@ public sealed class SearchDeliveryOrdersQueryHandler(
             DispatchedAt = order.DispatchedAt,
             PickedUpAt = order.PickedUpAt,
             DeliveredAt = order.DeliveredAt,
-            FailureReason = order.FailureReason
+            FailureReason = order.FailureReason,
+            CreatedAt = order.CreatedAt
         }).ToList();
     }
+
+    private static IOrderedEnumerable<Domain.Deliveries.Entities.DeliveryOrder> ApplySorting(
+        IReadOnlyCollection<Domain.Deliveries.Entities.DeliveryOrder> orders,
+        string? sortBy,
+        bool sortDescending)
+    {
+        return sortBy?.ToLowerInvariant() switch
+        {
+            "status" => sortDescending ? orders.OrderByDescending(x => x.Status) : orders.OrderBy(x => x.Status),
+            "provider" => sortDescending ? orders.OrderByDescending(x => x.Provider) : orders.OrderBy(x => x.Provider),
+            _ => sortDescending ? orders.OrderByDescending(x => x.CreatedAt) : orders.OrderBy(x => x.CreatedAt)
+        };
+    }
 }