feat: 实现租户管理及套餐流程

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

@@ -0,0 +1,39 @@
+using System.Linq;
+using MediatR;
+using TakeoutSaaS.Application.App.Tenants.Dto;
+using TakeoutSaaS.Application.App.Tenants.Queries;
+using TakeoutSaaS.Domain.Tenants.Repositories;
+using TakeoutSaaS.Shared.Abstractions.Results;
+
+namespace TakeoutSaaS.Application.App.Tenants.Handlers;
+
+/// <summary>
+/// 租户分页查询处理器。
+/// </summary>
+public sealed class SearchTenantsQueryHandler(ITenantRepository tenantRepository)
+    : IRequestHandler<SearchTenantsQuery, PagedResult<TenantDto>>
+{
+    private readonly ITenantRepository _tenantRepository = tenantRepository;
+
+    /// <inheritdoc />
+    public async Task<PagedResult<TenantDto>> Handle(SearchTenantsQuery request, CancellationToken cancellationToken)
+    {
+        var tenants = await _tenantRepository.SearchAsync(request.Status, request.Keyword, cancellationToken);
+        var total = tenants.Count;
+
+        var paged = tenants
+            .Skip((request.Page - 1) * request.PageSize)
+            .Take(request.PageSize)
+            .ToList();
+
+        var result = new List<TenantDto>(paged.Count);
+        foreach (var tenant in paged)
+        {
+            var subscription = await _tenantRepository.GetActiveSubscriptionAsync(tenant.Id, cancellationToken);
+            var verification = await _tenantRepository.GetVerificationProfileAsync(tenant.Id, cancellationToken);
+            result.Add(TenantMapping.ToDto(tenant, subscription, verification));
+        }
+
+        return new PagedResult<TenantDto>(result, request.Page, request.PageSize, total);
+    }
+}