95 lines
2.4 KiB
Go
95 lines
2.4 KiB
Go
package summary
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import (
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"context"
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"errors"
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"time"
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"bsm/full/module/ec/order/internal/impl"
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"bsm/full/module/ec/order/internal/models"
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pb "bsm/full/module/ec/order/pb"
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"git.apinb.com/bsm-sdk/core/errcode"
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"git.apinb.com/bsm-sdk/core/printer"
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"git.apinb.com/bsm-sdk/core/service"
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"gorm.io/gorm"
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)
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// 取消订单
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func Cancel(ctx context.Context, in *pb.CancelRequest) (reply *pb.OrderStatusReply, err error) {
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// parse authorization meta.
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_, err = service.ParseMetaCtx(ctx, nil)
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if err != nil {
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return nil, err
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}
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var (
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summary = new(models.OrderSummary)
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)
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err = impl.DBService.Where("order_no = ?", in.OrderNo).First(&summary).Error
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if err != nil {
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printer.Error(err.Error())
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return nil, errcode.ErrDB
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}
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// 状态机约束：只有"未支付"（status=1）的订单允许取消，其它状态拒绝，避免非法状态跃迁。
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if summary.Status != 1 {
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return nil, errcode.ErrUnavailable
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}
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details := make([]*models.OrderDetails, 0)
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err = impl.DBService.Transaction(func(tx *gorm.DB) error {
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// 1. 以状态为条件更新订单，避免并发下重复取消。
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result := tx.Model(&models.OrderSummary{}).Where("order_no = ? AND status = ?", in.OrderNo, 1).
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Updates(map[string]any{
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"status": -1,
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"coupon_identity": "",
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"coupon_amount": 0,
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})
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if result.Error != nil {
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return result.Error
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}
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if result.RowsAffected == 0 {
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return errcode.ErrUnavailable
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}
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// 2. 按订单明细的规格回补库存，避免取消后库存丢失。
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if err := tx.Where("summary_identity = ?", summary.Identity).Find(&details).Error; err != nil {
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return err
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}
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for _, d := range details {
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if d.Number > 0 {
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if err := tx.Table("mall_product_spec").Where("id = ?", d.SpecID).
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UpdateColumn("stock", gorm.Expr("stock + ?", d.Number)).Error; err != nil {
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return err
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}
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}
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}
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// 3. 退回已使用的优惠券，使其重新可用。
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if summary.CouponIdentity != "" {
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if err := tx.Model(&models.OrderCoupon{}).Where("identity = ?", summary.CouponIdentity).
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Update("status", 2).Error; err != nil {
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return err
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}
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}
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return nil
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})
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if err != nil {
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printer.Error(err.Error())
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if errors.Is(err, errcode.ErrUnavailable) {
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return nil, errcode.ErrUnavailable
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}
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return nil, errcode.ErrDB
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}
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return &pb.OrderStatusReply{
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Code: 0,
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Identity: summary.Identity,
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Message: "OK",
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Timeseq: time.Now().UnixNano(),
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}, nil
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}
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