CatalogRuleFactory.php

<?php
 
namespace Bitrix\Catalog\Access\Rule\Factory;
 
use Bitrix\Catalog\Access\ActionDictionary;
use Bitrix\Main\Access\AccessibleController;
use Bitrix\Main\Access\Rule\Factory\RuleControllerFactory;
 
class CatalogRuleFactory extends RuleControllerFactory
{
    protected const BASE_RULE = 'Base';
 
    protected function getClassName(string $action, AccessibleController $controller): ?string
    {
        $actionName = ActionDictionary::getActionRuleName($action);
        if (!$actionName)
        {
            return null;
        }
 
        $action = explode('_', $actionName);
        $action = array_map(fn($el) => ucfirst(mb_strtolower($el)), $action);
 
        $ruleClass = $this->getNamespace($controller) . implode($action) . static::SUFFIX;
 
        if (class_exists($ruleClass))
        {
            return $ruleClass;
        }
 
        return $this->getNamespace($controller) . static::BASE_RULE . static::SUFFIX;
    }
}