85 lines
3.1 KiB
C#
85 lines
3.1 KiB
C#
using MediatR;
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using Microsoft.Extensions.Logging;
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using TakeoutSaaS.Application.App.Merchants.Commands;
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using TakeoutSaaS.Domain.Merchants.Entities;
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using TakeoutSaaS.Domain.Merchants.Enums;
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using TakeoutSaaS.Domain.Merchants.Repositories;
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using TakeoutSaaS.Shared.Abstractions.Constants;
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using TakeoutSaaS.Shared.Abstractions.Exceptions;
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using TakeoutSaaS.Shared.Abstractions.Security;
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namespace TakeoutSaaS.Application.App.Merchants.Handlers;
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/// <summary>
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/// 冻结商户命令处理器。
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/// </summary>
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public sealed class FreezeMerchantCommandHandler(
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IMerchantRepository merchantRepository,
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ICurrentUserAccessor currentUserAccessor,
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ILogger<FreezeMerchantCommandHandler> logger)
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: IRequestHandler<FreezeMerchantCommand, bool>
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{
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/// <inheritdoc />
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public async Task<bool> Handle(FreezeMerchantCommand request, CancellationToken cancellationToken)
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{
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// 1. 验证 RowVersion
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if (request.RowVersion == 0)
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{
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throw new BusinessException(ErrorCodes.ValidationFailed, "RowVersion 不能为空");
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}
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// 2. 读取商户信息
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var merchant = await merchantRepository.FindByIdAsync(request.MerchantId, cancellationToken);
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if (merchant == null)
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{
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return false;
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}
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// 3. 检查是否已冻结
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if (merchant.IsFrozen)
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{
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throw new BusinessException(ErrorCodes.ValidationFailed, "商户已处于冻结状态");
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}
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// 4. 执行冻结
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var now = DateTime.UtcNow;
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var actorId = currentUserAccessor.UserId == 0 ? (long?)null : currentUserAccessor.UserId;
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var actorName = currentUserAccessor.IsAuthenticated ? $"user:{currentUserAccessor.UserId}" : "system";
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merchant.IsFrozen = true;
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merchant.FrozenReason = request.Reason?.Trim();
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merchant.FrozenAt = now;
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merchant.RowVersion = request.RowVersion;
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// 5. 记录审核日志
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await merchantRepository.AddAuditLogAsync(new MerchantAuditLog
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{
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TenantId = merchant.TenantId,
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MerchantId = merchant.Id,
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Action = MerchantAuditAction.Frozen,
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Title = "商户冻结",
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Description = string.IsNullOrWhiteSpace(request.Reason) ? "管理员冻结商户" : $"冻结原因：{request.Reason.Trim()}",
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OperatorId = actorId,
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OperatorName = actorName
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}, cancellationToken);
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// 6. 持久化
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await merchantRepository.UpdateMerchantAsync(merchant, cancellationToken);
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try
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{
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await merchantRepository.SaveChangesAsync(cancellationToken);
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}
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catch (Exception exception) when (IsConcurrencyException(exception))
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{
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throw new BusinessException(ErrorCodes.Conflict, "商户信息已被修改，请刷新后重试");
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}
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logger.LogInformation("冻结商户 {MerchantId}，原因：{Reason}", merchant.Id, request.Reason);
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return true;
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}
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private static bool IsConcurrencyException(Exception exception)
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=> string.Equals(exception.GetType().Name, "DbUpdateConcurrencyException", StringComparison.Ordinal);
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}
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