110 lines
3.3 KiB
Go
Executable File
110 lines
3.3 KiB
Go
Executable File
package user
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import (
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"context"
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"errors"
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"time"
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"bindbox-game/internal/repository/mysql/dao"
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"bindbox-game/internal/repository/mysql/model"
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"gorm.io/gorm/clause"
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)
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// CancelOrder 取消订单
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func (s *service) CancelOrder(ctx context.Context, userID int64, orderID int64, reason string) (*model.Orders, error) {
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var updatedOrder *model.Orders
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err := s.writeDB.Transaction(func(tx *dao.Query) error {
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// 1. 查询订单
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order, err := tx.Orders.WithContext(ctx).Clauses(clause.Locking{Strength: "UPDATE"}).Where(tx.Orders.ID.Eq(orderID), tx.Orders.UserID.Eq(userID)).First()
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if err != nil {
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return err
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}
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if order == nil {
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return errors.New("order not found")
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}
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// 2. 校验状态
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if order.Status != 1 {
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return errors.New("order cannot be cancelled")
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}
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// 3. 退还积分
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if order.PointsAmount > 0 {
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refundReason := "cancel_order"
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if reason != "" {
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refundReason = refundReason + ":" + reason
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}
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// order.PointsAmount 已经是分单位，直接退还
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pointsToRefund := order.PointsAmount
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// Update User Points
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existing, _ := tx.UserPoints.WithContext(ctx).Clauses(clause.Locking{Strength: "UPDATE"}).Where(tx.UserPoints.UserID.Eq(userID)).First()
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if existing == nil {
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if err := tx.UserPoints.WithContext(ctx).Omit(tx.UserPoints.ValidEnd).Create(&model.UserPoints{UserID: userID, Points: pointsToRefund}); err != nil {
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return err
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}
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} else {
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if _, err := tx.UserPoints.WithContext(ctx).Where(tx.UserPoints.ID.Eq(existing.ID)).Updates(map[string]any{"points": existing.Points + pointsToRefund}); err != nil {
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return err
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}
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}
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// Log
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led := &model.UserPointsLedger{UserID: userID, Action: "refund_points", Points: pointsToRefund, RefTable: "orders", RefID: order.OrderNo, Remark: refundReason}
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if err := tx.UserPointsLedger.WithContext(ctx).Create(led); err != nil {
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return err
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}
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}
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// 4. 退还优惠券（恢复预扣的余额和状态）
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if order.CouponID > 0 {
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var oc struct {
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AppliedAmount int64
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}
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// 获取该订单实际扣减的优惠券金额
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_ = tx.OrderCoupons.WithContext(ctx).Where(tx.OrderCoupons.OrderID.Eq(order.ID), tx.OrderCoupons.UserCouponID.Eq(order.CouponID)).Scan(&oc)
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// 执行原子回退：增加余额 + 重置状态 + 清除占用订单
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res := tx.UserCoupons.WithContext(ctx).UnderlyingDB().Exec(`
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UPDATE user_coupons
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SET balance_amount = balance_amount + ?,
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status = 1,
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used_order_id = 0,
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used_at = NULL
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WHERE id = ? AND used_order_id = ?
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`, oc.AppliedAmount, order.CouponID, order.ID)
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if res.RowsAffected > 0 {
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// 记录退还流水
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_ = tx.UserCouponLedger.WithContext(ctx).Create(&model.UserCouponLedger{
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UserID: userID,
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UserCouponID: order.CouponID,
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ChangeAmount: oc.AppliedAmount,
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OrderID: order.ID,
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Action: "cancel_refund",
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CreatedAt: time.Now(),
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})
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}
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}
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// 5. 更新订单状态
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updates := map[string]any{
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tx.Orders.Status.ColumnName().String(): 3,
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tx.Orders.CancelledAt.ColumnName().String(): time.Now(),
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}
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if _, err := tx.Orders.WithContext(ctx).Where(tx.Orders.ID.Eq(order.ID)).Updates(updates); err != nil {
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return err
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}
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updatedOrder = order
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updatedOrder.Status = 3
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return nil
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})
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if err != nil {
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return nil, err
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}
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return updatedOrder, nil
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}
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