77 lines
3.1 KiB
C#
77 lines
3.1 KiB
C#
using MediatR;
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using Microsoft.Extensions.Logging;
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using TakeoutSaaS.Application.App.Inventory.Commands;
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using TakeoutSaaS.Application.App.Inventory.Dto;
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using TakeoutSaaS.Domain.Inventory.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.Tenancy;
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namespace TakeoutSaaS.Application.App.Inventory.Handlers;
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/// <summary>
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/// 库存释放处理器。
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/// </summary>
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public sealed class ReleaseInventoryCommandHandler(
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IInventoryRepository inventoryRepository,
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ITenantProvider tenantProvider,
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ILogger<ReleaseInventoryCommandHandler> logger)
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: IRequestHandler<ReleaseInventoryCommand, InventoryItemDto>
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{
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/// <inheritdoc />
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public async Task<InventoryItemDto> Handle(ReleaseInventoryCommand request, CancellationToken cancellationToken)
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{
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// 1. 读取库存
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var tenantId = tenantProvider.GetCurrentTenantId();
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var item = await inventoryRepository.GetForUpdateAsync(tenantId, request.StoreId, request.ProductSkuId, cancellationToken);
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if (item is null)
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{
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throw new BusinessException(ErrorCodes.NotFound, "库存不存在");
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}
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// 1.1 幂等处理：若提供键且锁记录不存在，直接视为已释放
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if (!string.IsNullOrWhiteSpace(request.IdempotencyKey))
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{
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var lockRecord = await inventoryRepository.FindLockByKeyAsync(tenantId, request.IdempotencyKey, cancellationToken);
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if (lockRecord is not null)
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{
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if (lockRecord.Status != Domain.Inventory.Enums.InventoryLockStatus.Locked)
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{
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return InventoryMapping.ToDto(item);
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}
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// 将数量同步为锁记录数，避免重复释放不一致
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request = request with { Quantity = lockRecord.Quantity };
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await inventoryRepository.MarkLockStatusAsync(lockRecord, Domain.Inventory.Enums.InventoryLockStatus.Released, cancellationToken);
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}
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}
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// 2. 计算释放
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var isPresale = request.IsPresaleOrder || item.IsPresale;
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if (isPresale)
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{
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if (item.PresaleLocked < request.Quantity)
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{
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throw new BusinessException(ErrorCodes.Conflict, "预售锁定不足");
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}
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item.PresaleLocked -= request.Quantity;
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}
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else
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{
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if (item.QuantityReserved < request.Quantity)
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{
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throw new BusinessException(ErrorCodes.Conflict, "锁定库存不足");
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}
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item.QuantityReserved -= request.Quantity;
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}
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item.IsSoldOut = item.QuantityOnHand - item.QuantityReserved - item.PresaleLocked <= (item.SafetyStock ?? 0);
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await inventoryRepository.UpdateItemAsync(item, cancellationToken);
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await inventoryRepository.SaveChangesAsync(cancellationToken);
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logger.LogInformation("释放库存 门店 {StoreId} SKU {ProductSkuId} 数量 {Quantity}", request.StoreId, request.ProductSkuId, request.Quantity);
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return InventoryMapping.ToDto(item);
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}
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}
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