Add getEnabledRuleNum function to WafService for calculating enabled rule count

This new function retrieves the number of enabled WAF rule categories and adjusts the count based on the WAF service's rule category status. The RuleNum field in the GetWaf method is updated to use this new function, enhancing the accuracy of the WAF service response.

internal/service/waf.go

@@ -61,6 +61,21 @@ func NewWafService(clusterClientManager *utils.ClusterClientManager, db *gorm.DB
 	return &wafService{clusterClientManager: clusterClientManager, db: db, gatewayUrl: gatewayUrl, elasticClient: elasticClient}
 }
 
+func getEnabledRuleNum(db *gorm.DB, wafService *model.WafService) int {
+	ruleNum := 0
+	var ruleCategoryNum int64
+	if err := db.Model(&model.WafRuleCategory{}).Where("status = ?", 0).Count(&ruleCategoryNum).Error; err != nil {
+		log.Error().Msgf("failed to get rule categories: %v", err)
+		return 0
+	}
+	if wafService.RuleCategoryStatus != nil && len(wafService.RuleCategoryStatus.CategoryID) == 1 {
+		ruleNum = len(wafService.RuleCategoryStatus.CategoryID)
+	}
+
+	ruleCategoryNum = ruleCategoryNum - int64(ruleNum)
+	return int(ruleCategoryNum)
+}
+
 func (s *wafService) GetWaf(ctx context.Context, regionCode, namespace, gatewayName string) (*WafService, error) {
 	wafService := &model.WafService{}
 	err := s.db.Model(&model.WafService{}).Where("gateway_name = ? AND region_code = ? AND namespace = ?", gatewayName, regionCode, namespace).First(wafService).Error
@@ -97,7 +112,7 @@ func (s *wafService) GetWaf(ctx context.Context, regionCode, namespace, gatewayN
 	return &WafService{
 		GatewayName: wafService.GatewayName,
 		Mode:        wafService.Mode,
-		RuleNum:     wafService.RuleNum,
+		RuleNum:     getEnabledRuleNum(s.db, wafService),
 		AttackNum:   wafService.AttackNum,
 		Listeners:   listeners,
 	}, nil