89 lines
3.4 KiB
C#
89 lines
3.4 KiB
C#
using MediatR;
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using TakeoutSaaS.Application.App.QuotaPackages.Commands;
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using TakeoutSaaS.Application.App.QuotaPackages.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.Ids;
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namespace TakeoutSaaS.Application.App.QuotaPackages.Handlers;
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/// <summary>
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/// 购买配额包命令处理器。
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/// </summary>
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public sealed class PurchaseQuotaPackageCommandHandler(
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IQuotaPackageRepository quotaPackageRepository,
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ITenantQuotaUsageHistoryRepository quotaUsageHistoryRepository,
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IIdGenerator idGenerator)
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: IRequestHandler<PurchaseQuotaPackageCommand, TenantQuotaPurchaseDto>
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{
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/// <inheritdoc />
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public async Task<TenantQuotaPurchaseDto> Handle(PurchaseQuotaPackageCommand request, CancellationToken cancellationToken)
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{
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// 1. 查找配额包
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var quotaPackage = await quotaPackageRepository.FindByIdAsync(request.QuotaPackageId, cancellationToken);
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if (quotaPackage == null)
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{
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throw new InvalidOperationException("配额包不存在");
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}
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// 2. 创建购买记录
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var purchase = new TenantQuotaPackagePurchase
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{
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Id = idGenerator.NextId(),
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TenantId = request.TenantId,
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QuotaPackageId = request.QuotaPackageId,
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QuotaValue = quotaPackage.QuotaValue,
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Price = quotaPackage.Price,
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PurchasedAt = DateTime.UtcNow,
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ExpiredAt = request.ExpiredAt,
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Notes = request.Notes,
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CreatedAt = DateTime.UtcNow
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};
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// 3. 保存购买记录
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await quotaPackageRepository.AddPurchaseAsync(purchase, cancellationToken);
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// 4. 更新租户配额（根据配额类型更新对应配额）
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var quotaUsage = await quotaPackageRepository.FindUsageAsync(request.TenantId, quotaPackage.QuotaType, cancellationToken);
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if (quotaUsage != null)
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{
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var beforeLimit = quotaUsage.LimitValue;
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quotaUsage.LimitValue += quotaPackage.QuotaValue;
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await quotaPackageRepository.UpdateUsageAsync(quotaUsage, cancellationToken);
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// 4.1 记录配额变更历史（购买配额包视为“剩余增加”）
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await quotaUsageHistoryRepository.AddAsync(new TenantQuotaUsageHistory
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{
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TenantId = request.TenantId,
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QuotaType = quotaPackage.QuotaType,
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UsedValue = quotaUsage.UsedValue,
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LimitValue = quotaUsage.LimitValue,
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RecordedAt = DateTime.UtcNow,
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ChangeType = TenantQuotaUsageHistoryChangeType.Increase,
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ChangeAmount = quotaUsage.LimitValue - beforeLimit,
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ChangeReason = $"购买配额包：{quotaPackage.Name}"
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}, cancellationToken);
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}
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await quotaPackageRepository.SaveChangesAsync(cancellationToken);
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// 5. 返回 DTO
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return new TenantQuotaPurchaseDto
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{
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Id = purchase.Id,
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TenantId = purchase.TenantId,
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QuotaPackageId = purchase.QuotaPackageId,
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QuotaPackageName = quotaPackage.Name,
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QuotaType = quotaPackage.QuotaType,
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QuotaValue = purchase.QuotaValue,
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Price = purchase.Price,
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PurchasedAt = purchase.PurchasedAt,
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ExpiredAt = purchase.ExpiredAt,
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Notes = purchase.Notes
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};
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}
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}
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