80 lines
2.8 KiB
C#
80 lines
2.8 KiB
C#
using MediatR;
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using TakeoutSaaS.Application.App.Merchants.Commands;
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using TakeoutSaaS.Application.App.Merchants.Dto;
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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.Ids;
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using TakeoutSaaS.Shared.Abstractions.Security;
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using TakeoutSaaS.Shared.Abstractions.Tenancy;
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namespace TakeoutSaaS.Application.App.Merchants.Handlers;
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/// <summary>
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/// 创建商户合同。
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/// </summary>
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public sealed class CreateMerchantContractCommandHandler(
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IMerchantRepository merchantRepository,
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ITenantProvider tenantProvider,
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IIdGenerator idGenerator,
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ICurrentUserAccessor currentUserAccessor)
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: IRequestHandler<CreateMerchantContractCommand, MerchantContractDto>
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{
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public async Task<MerchantContractDto> Handle(CreateMerchantContractCommand request, CancellationToken cancellationToken)
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{
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// 1. 校验时间
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if (request.EndDate <= request.StartDate)
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{
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throw new BusinessException(ErrorCodes.BadRequest, "合同结束时间必须晚于开始时间");
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}
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// 2. 查询商户
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var tenantId = tenantProvider.GetCurrentTenantId();
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var merchant = await merchantRepository.FindByIdAsync(request.MerchantId, tenantId, cancellationToken)
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?? throw new BusinessException(ErrorCodes.NotFound, "商户不存在");
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// 3. 构建合同
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var contract = new MerchantContract
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{
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Id = idGenerator.NextId(),
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MerchantId = merchant.Id,
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ContractNumber = request.ContractNumber.Trim(),
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StartDate = request.StartDate,
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EndDate = request.EndDate,
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FileUrl = request.FileUrl.Trim()
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};
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// 4. 持久化与审计
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await merchantRepository.AddContractAsync(contract, cancellationToken);
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await merchantRepository.AddAuditLogAsync(new MerchantAuditLog
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{
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TenantId = tenantId,
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MerchantId = merchant.Id,
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Action = MerchantAuditAction.ContractUpdated,
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Title = "新增合同",
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Description = $"合同号：{contract.ContractNumber}",
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OperatorId = ResolveOperatorId(),
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OperatorName = ResolveOperatorName()
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}, cancellationToken);
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await merchantRepository.SaveChangesAsync(cancellationToken);
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// 5. 返回 DTO
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return MerchantMapping.ToDto(contract);
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}
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private long? ResolveOperatorId()
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{
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var id = currentUserAccessor.UserId;
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return id == 0 ? null : id;
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}
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private string ResolveOperatorName()
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{
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var id = currentUserAccessor.UserId;
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return id == 0 ? "system" : $"user:{id}";
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}
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}
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