feat: 套餐管理与配额校验能力

src/Application/TakeoutSaaS.Application/App/Tenants/Handlers/UpdateTenantPackageCommandHandler.cs

@@ -0,0 +1,48 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Tenants.Commands;
+using TakeoutSaaS.Application.App.Tenants.Dto;
+using TakeoutSaaS.Domain.Tenants.Repositories;
+using TakeoutSaaS.Shared.Abstractions.Constants;
+using TakeoutSaaS.Shared.Abstractions.Exceptions;
+
+namespace TakeoutSaaS.Application.App.Tenants.Handlers;
+
+/// <summary>
+/// 更新租户套餐处理器。
+/// </summary>
+public sealed class UpdateTenantPackageCommandHandler(ITenantPackageRepository packageRepository)
+    : IRequestHandler<UpdateTenantPackageCommand, TenantPackageDto?>
+{
+    /// <inheritdoc />
+    public async Task<TenantPackageDto?> Handle(UpdateTenantPackageCommand request, CancellationToken cancellationToken)
+    {
+        if (string.IsNullOrWhiteSpace(request.Name))
+        {
+            throw new BusinessException(ErrorCodes.BadRequest, "套餐名称不能为空");
+        }
+
+        var package = await packageRepository.FindByIdAsync(request.TenantPackageId, cancellationToken);
+        if (package == null)
+        {
+            return null;
+        }
+
+        package.Name = request.Name.Trim();
+        package.Description = request.Description;
+        package.PackageType = request.PackageType;
+        package.MonthlyPrice = request.MonthlyPrice;
+        package.YearlyPrice = request.YearlyPrice;
+        package.MaxStoreCount = request.MaxStoreCount;
+        package.MaxAccountCount = request.MaxAccountCount;
+        package.MaxStorageGb = request.MaxStorageGb;
+        package.MaxSmsCredits = request.MaxSmsCredits;
+        package.MaxDeliveryOrders = request.MaxDeliveryOrders;
+        package.FeaturePoliciesJson = request.FeaturePoliciesJson;
+        package.IsActive = request.IsActive;
+
+        await packageRepository.UpdateAsync(package, cancellationToken);
+        await packageRepository.SaveChangesAsync(cancellationToken);
+
+        return package.ToDto();
+    }
+}