109 lines
4.4 KiB
C#
109 lines
4.4 KiB
C#
using MediatR;
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using TakeoutSaaS.Application.App.Tenants.Commands;
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using TakeoutSaaS.Application.App.Tenants.Dto;
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using TakeoutSaaS.Domain.Tenants.Entities;
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using TakeoutSaaS.Domain.Tenants.Enums;
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using TakeoutSaaS.Domain.Tenants.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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namespace TakeoutSaaS.Application.App.Tenants.Handlers;
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/// <summary>
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/// 延期/赠送订阅处理器（按当前订阅套餐续费）。
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/// </summary>
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public sealed class ExtendTenantSubscriptionCommandHandler(
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ITenantRepository tenantRepository,
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IIdGenerator idGenerator,
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ICurrentUserAccessor currentUserAccessor)
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: IRequestHandler<ExtendTenantSubscriptionCommand, TenantSubscriptionDto>
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{
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/// <inheritdoc />
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public async Task<TenantSubscriptionDto> Handle(ExtendTenantSubscriptionCommand request, CancellationToken cancellationToken)
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{
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// 1. 校验时长
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if (request.DurationMonths <= 0)
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{
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throw new BusinessException(ErrorCodes.BadRequest, "延期/赠送时长必须大于 0");
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}
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// 2. 获取租户与当前订阅
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var tenant = await tenantRepository.FindByIdAsync(request.TenantId, cancellationToken)
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?? throw new BusinessException(ErrorCodes.NotFound, "租户不存在");
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var current = await tenantRepository.GetActiveSubscriptionAsync(request.TenantId, cancellationToken)
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?? throw new BusinessException(ErrorCodes.BadRequest, "订阅不存在，无法延期/赠送");
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var now = DateTime.UtcNow;
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var effectiveFrom = current.EffectiveTo > now ? current.EffectiveTo : now;
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var effectiveTo = effectiveFrom.AddMonths(request.DurationMonths);
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var previousStatus = tenant.Status;
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var actorName = currentUserAccessor.IsAuthenticated
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? $"user:{currentUserAccessor.UserId}"
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: "system";
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// 3. 创建续费订阅
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var subscription = new TenantSubscription
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{
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Id = idGenerator.NextId(),
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TenantId = tenant.Id,
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TenantPackageId = current.TenantPackageId,
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EffectiveFrom = effectiveFrom,
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EffectiveTo = effectiveTo,
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NextBillingDate = effectiveTo,
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Status = SubscriptionStatus.Active,
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AutoRenew = current.AutoRenew,
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Notes = request.Notes
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};
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await tenantRepository.AddSubscriptionAsync(subscription, cancellationToken);
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await tenantRepository.AddSubscriptionHistoryAsync(new TenantSubscriptionHistory
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{
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Id = idGenerator.NextId(),
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TenantId = tenant.Id,
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TenantSubscriptionId = subscription.Id,
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FromPackageId = current.TenantPackageId,
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ToPackageId = current.TenantPackageId,
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ChangeType = SubscriptionChangeType.Renew,
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EffectiveFrom = effectiveFrom,
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EffectiveTo = effectiveTo,
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Amount = null,
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Currency = null,
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Notes = request.Notes
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}, cancellationToken);
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// 4. 若租户处于到期状态则恢复为正常（冻结状态需先解冻）
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if (tenant.Status == TenantStatus.Expired)
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{
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tenant.Status = TenantStatus.Active;
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}
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tenant.EffectiveFrom = subscription.EffectiveFrom;
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tenant.EffectiveTo = subscription.EffectiveTo;
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await tenantRepository.UpdateTenantAsync(tenant, cancellationToken);
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// 5. 记录审计
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await tenantRepository.AddAuditLogAsync(new TenantAuditLog
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{
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TenantId = tenant.Id,
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Action = TenantAuditAction.SubscriptionUpdated,
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Title = "延期/赠送时长",
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Description = $"续费 {request.DurationMonths} 月，到期时间：{current.EffectiveTo:yyyy-MM-dd HH:mm:ss} -> {subscription.EffectiveTo:yyyy-MM-dd HH:mm:ss}",
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OperatorId = currentUserAccessor.UserId == 0 ? null : currentUserAccessor.UserId,
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OperatorName = actorName,
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PreviousStatus = previousStatus,
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CurrentStatus = tenant.Status
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}, cancellationToken);
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// 6. 保存并返回
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await tenantRepository.SaveChangesAsync(cancellationToken);
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return subscription.ToSubscriptionDto()
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?? throw new BusinessException(ErrorCodes.InternalServerError, "订阅生成失败");
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}
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}
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