feat: 商户类目数据库化并增加权限种子

src/Application/TakeoutSaaS.Application/App/Merchants/Handlers/ReviewMerchantCommandHandler.cs

@@ -0,0 +1,74 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Merchants.Commands;
+using TakeoutSaaS.Application.App.Merchants.Dto;
+using TakeoutSaaS.Domain.Merchants.Entities;
+using TakeoutSaaS.Domain.Merchants.Enums;
+using TakeoutSaaS.Domain.Merchants.Repositories;
+using TakeoutSaaS.Shared.Abstractions.Constants;
+using TakeoutSaaS.Shared.Abstractions.Exceptions;
+using TakeoutSaaS.Shared.Abstractions.Security;
+using TakeoutSaaS.Shared.Abstractions.Tenancy;
+
+namespace TakeoutSaaS.Application.App.Merchants.Handlers;
+
+/// <summary>
+/// 商户审核处理器。
+/// </summary>
+public sealed class ReviewMerchantCommandHandler(
+    IMerchantRepository merchantRepository,
+    ITenantProvider tenantProvider,
+    ICurrentUserAccessor currentUserAccessor)
+    : IRequestHandler<ReviewMerchantCommand, MerchantDto>
+{
+    private readonly IMerchantRepository _merchantRepository = merchantRepository;
+    private readonly ITenantProvider _tenantProvider = tenantProvider;
+    private readonly ICurrentUserAccessor _currentUserAccessor = currentUserAccessor;
+
+    public async Task<MerchantDto> Handle(ReviewMerchantCommand request, CancellationToken cancellationToken)
+    {
+        var tenantId = _tenantProvider.GetCurrentTenantId();
+        var merchant = await _merchantRepository.FindByIdAsync(request.MerchantId, tenantId, cancellationToken)
+                       ?? throw new BusinessException(ErrorCodes.NotFound, "商户不存在");
+
+        if (request.Approve && merchant.Status == MerchantStatus.Approved)
+        {
+            return MerchantMapping.ToDto(merchant);
+        }
+
+        var previousStatus = merchant.Status;
+        merchant.Status = request.Approve ? MerchantStatus.Approved : MerchantStatus.Rejected;
+        merchant.ReviewRemarks = request.Remarks;
+        merchant.LastReviewedAt = DateTime.UtcNow;
+        if (request.Approve && merchant.JoinedAt == null)
+        {
+            merchant.JoinedAt = DateTime.UtcNow;
+        }
+
+        await _merchantRepository.UpdateMerchantAsync(merchant, cancellationToken);
+        await _merchantRepository.AddAuditLogAsync(new MerchantAuditLog
+        {
+            TenantId = tenantId,
+            MerchantId = merchant.Id,
+            Action = MerchantAuditAction.MerchantReviewed,
+            Title = request.Approve ? "商户审核通过" : "商户审核驳回",
+            Description = request.Remarks,
+            OperatorId = ResolveOperatorId(),
+            OperatorName = ResolveOperatorName()
+        }, cancellationToken);
+        await _merchantRepository.SaveChangesAsync(cancellationToken);
+
+        return MerchantMapping.ToDto(merchant);
+    }
+
+    private long? ResolveOperatorId()
+    {
+        var id = _currentUserAccessor.UserId;
+        return id == 0 ? null : id;
+    }
+
+    private string ResolveOperatorName()
+    {
+        var id = _currentUserAccessor.UserId;
+        return id == 0 ? "system" : $"user:{id}";
+    }
+}