feat: 套餐管理与配额校验能力

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

@@ -0,0 +1,46 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Tenants.Commands;
+using TakeoutSaaS.Application.App.Tenants.Dto;
+using TakeoutSaaS.Domain.Tenants.Entities;
+using TakeoutSaaS.Domain.Tenants.Repositories;
+using TakeoutSaaS.Shared.Abstractions.Constants;
+using TakeoutSaaS.Shared.Abstractions.Exceptions;
+
+namespace TakeoutSaaS.Application.App.Tenants.Handlers;
+
+/// <summary>
+/// 创建租户套餐处理器。
+/// </summary>
+public sealed class CreateTenantPackageCommandHandler(ITenantPackageRepository packageRepository)
+    : IRequestHandler<CreateTenantPackageCommand, TenantPackageDto>
+{
+    /// <inheritdoc />
+    public async Task<TenantPackageDto> Handle(CreateTenantPackageCommand request, CancellationToken cancellationToken)
+    {
+        if (string.IsNullOrWhiteSpace(request.Name))
+        {
+            throw new BusinessException(ErrorCodes.BadRequest, "套餐名称不能为空");
+        }
+
+        var package = new TenantPackage
+        {
+            Name = request.Name.Trim(),
+            Description = request.Description,
+            PackageType = request.PackageType,
+            MonthlyPrice = request.MonthlyPrice,
+            YearlyPrice = request.YearlyPrice,
+            MaxStoreCount = request.MaxStoreCount,
+            MaxAccountCount = request.MaxAccountCount,
+            MaxStorageGb = request.MaxStorageGb,
+            MaxSmsCredits = request.MaxSmsCredits,
+            MaxDeliveryOrders = request.MaxDeliveryOrders,
+            FeaturePoliciesJson = request.FeaturePoliciesJson,
+            IsActive = request.IsActive
+        };
+
+        await packageRepository.AddAsync(package, cancellationToken);
+        await packageRepository.SaveChangesAsync(cancellationToken);
+
+        return package.ToDto();
+    }
+}