draft

backend/internal/repository/refund_order.go

@@ -0,0 +1,63 @@
+package repository
+
+import (
+	"context"
+	"errors"
+
+	"gorm.io/gorm"
+	"pay-bridge/internal/model"
+)
+
+// RefundOrderRepository 退款记录数据访问
+type RefundOrderRepository struct {
+	db *gorm.DB
+}
+
+func NewRefundOrderRepository(db *gorm.DB) *RefundOrderRepository {
+	return &RefundOrderRepository{db: db}
+}
+
+// Create 创建退款单
+func (r *RefundOrderRepository) Create(ctx context.Context, refund *model.RefundOrder) error {
+	return r.db.WithContext(ctx).Create(refund).Error
+}
+
+// GetByRefundNo 按 refund_no 查询
+func (r *RefundOrderRepository) GetByRefundNo(ctx context.Context, refundNo string) (*model.RefundOrder, error) {
+	var refund model.RefundOrder
+	err := r.db.WithContext(ctx).Where("refund_no = ?", refundNo).First(&refund).Error
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		return nil, nil
+	}
+	return &refund, err
+}
+
+// SumRefundedAmount 统计某笔交易已退款总额（成功+处理中）
+func (r *RefundOrderRepository) SumRefundedAmount(ctx context.Context, tradeNo string) (int64, error) {
+	var total int64
+	err := r.db.WithContext(ctx).Model(&model.RefundOrder{}).
+		Where("trade_no = ? AND status IN ?", tradeNo, []model.RefundStatus{
+			model.RefundStatusPending,
+			model.RefundStatusProcessing,
+			model.RefundStatusSuccess,
+		}).
+		Select("COALESCE(SUM(refund_amount), 0)").
+		Scan(&total).Error
+	return total, err
+}
+
+// UpdateStatus 更新退款状态
+func (r *RefundOrderRepository) UpdateStatus(ctx context.Context, refundNo string, fromStatus, toStatus model.RefundStatus, updates map[string]any) (bool, error) {
+	if updates == nil {
+		updates = make(map[string]any)
+	}
+	updates["status"] = toStatus
+
+	result := r.db.WithContext(ctx).Model(&model.RefundOrder{}).
+		Where("refund_no = ? AND status = ?", refundNo, fromStatus).
+		Updates(updates)
+	if result.Error != nil {
+		return false, result.Error
+	}
+	return result.RowsAffected > 0, nil
+}