base.php

<?php
 
namespace Bitrix\Main\Controller\Filter;
 
use Bitrix\Main\Error;
use Bitrix\Main\Localization\Loc;
 
class Base extends \Bitrix\Main\Engine\Controller
{
    protected function getList($entityTypeId, array $filterSettingsParams, ?array $additionalParams = null)
    {
        $result = [];
        $entityFilter = \Bitrix\Main\Filter\Factory::createEntityFilter(
            $entityTypeId,
            $filterSettingsParams,
            $additionalParams
        );
 
        foreach($entityFilter->getFields() as $field)
        {
            $result[] = \Bitrix\Main\UI\Filter\FieldAdapter::adapt($field->toArray([
                'lightweight' => true
            ]));
        }
 
        return $result;
    }
 
    protected function getField($entityTypeId, array $filterSettingsParams, $id, ?array $additionalParams = null)
    {
        $entityFilter = \Bitrix\Main\Filter\Factory::createEntityFilter(
            $entityTypeId,
            $filterSettingsParams,
            $additionalParams
        );
 
        $field = $entityFilter->getField($id);
        if($field)
        {
            $result = \Bitrix\Main\UI\Filter\FieldAdapter::adapt($field->toArray());
        }
        else
        {
            $this->addError(new Error(Loc::getMessage("MAIN_CONTROLLER_FILTER_FIELD_NOT_FOUND"), "MAIN_CONTROLLER_FILTER_FIELD_NOT_FOUND"));
            return null;
        }
 
        return $result;
    }
 
    public function getListAction($filterId, $componentName, $signedParameters)
    {
        return [];
    }
 
    public function getFieldAction($filterId, $id, $componentName, $signedParameters)
    {
        return [];
    }
}