修复(#16): 修复订单退款状态与后台恢复冲突 (#16)

Co-authored-by: multica-agent <github@multica.ai>

internal/model/log/refund.go

@@ -7,9 +7,6 @@ import (
 )
 
 // HasRefundCommissionLog 判断指定订单号是否已写入 333 退款佣金日志。
-// 用于 refund 主流程做幂等校验，以及 stuck-order recovery / activate worker
-// 区分「已退款」（terminal）与「短暂 claimed」（transient）这两种共用 status=6
-// 的语义。
 //
 // 实现细节：
 //  1. type=33 + content LIKE '%"order_no":"<orderNo>"%' 先走索引粗筛；
@@ -36,3 +33,26 @@ func HasRefundCommissionLog(tx *gorm.DB, orderNo string) (bool, error) {
 	}
 	return false, nil
 }
+
+// HasOrderRefundLog 判断指定订单号是否已写入 24 订单退款审计日志。
+func HasOrderRefundLog(tx *gorm.DB, orderNo string) (bool, error) {
+	if orderNo == "" {
+		return false, nil
+	}
+	var logs []SystemLog
+	if err := tx.Model(&SystemLog{}).
+		Where("type = ? AND content LIKE ?", TypeOrderRefund.Uint8(), fmt.Sprintf("%%\"order_no\":\"%s\"%%", orderNo)).
+		Find(&logs).Error; err != nil {
+		return false, fmt.Errorf("query order refund log failed: %w", err)
+	}
+	for _, item := range logs {
+		var content OrderRefund
+		if err := content.Unmarshal([]byte(item.Content)); err != nil {
+			continue
+		}
+		if content.OrderNo == orderNo {
+			return true, nil
+		}
+	}
+	return false, nil
+}

internal/model/log/refund_test.go

@@ -140,6 +140,62 @@ func TestHasRefundCommissionLog(t *testing.T) {
 	})
 }
 
+func TestHasOrderRefundLog(t *testing.T) {
+	const orderNo = "ORD-REFUND-AUDIT-1"
+
+	t.Run("returns true when order refund audit log exists", func(t *testing.T) {
+		db, mock, cleanup := newRefundLogTestDB(t)
+		defer cleanup()
+
+		mock.ExpectQuery("FROM `system_logs`").
+			WithArgs(uint8(24), fmt.Sprintf(`%%"order_no":"%s"%%`, orderNo)).
+			WillReturnRows(sqlmock.NewRows([]string{"id", "content"}).
+				AddRow(1, fmt.Sprintf(`{"order_id":100,"order_no":"%s","order_status_after":7}`, orderNo)))
+
+		got, err := HasOrderRefundLog(db, orderNo)
+		if err != nil {
+			t.Fatalf("HasOrderRefundLog error: %v", err)
+		}
+		if !got {
+			t.Fatalf("HasOrderRefundLog = false, want true")
+		}
+		assertRefundLogExpectations(t, mock)
+	})
+
+	t.Run("returns false when audit log order_no does not match", func(t *testing.T) {
+		db, mock, cleanup := newRefundLogTestDB(t)
+		defer cleanup()
+
+		mock.ExpectQuery("FROM `system_logs`").
+			WithArgs(uint8(24), fmt.Sprintf(`%%"order_no":"%s"%%`, orderNo)).
+			WillReturnRows(sqlmock.NewRows([]string{"id", "content"}).
+				AddRow(1, `{"order_id":100,"order_no":"OTHER","order_status_after":7}`))
+
+		got, err := HasOrderRefundLog(db, orderNo)
+		if err != nil {
+			t.Fatalf("HasOrderRefundLog error: %v", err)
+		}
+		if got {
+			t.Fatalf("HasOrderRefundLog = true, want false")
+		}
+		assertRefundLogExpectations(t, mock)
+	})
+
+	t.Run("returns false for empty order_no without querying", func(t *testing.T) {
+		db, mock, cleanup := newRefundLogTestDB(t)
+		defer cleanup()
+
+		got, err := HasOrderRefundLog(db, "")
+		if err != nil {
+			t.Fatalf("HasOrderRefundLog error: %v", err)
+		}
+		if got {
+			t.Fatalf("HasOrderRefundLog = true, want false")
+		}
+		assertRefundLogExpectations(t, mock)
+	})
+}
+
 func newRefundLogTestDB(t *testing.T) (*gorm.DB, sqlmock.Sqlmock, func()) {
 	t.Helper()