base.php

<?php
 
namespace Bitrix\Catalog\Controller\Product;
 
use Bitrix\Catalog\Controller\Product;
use Bitrix\Main\Engine;
use Bitrix\Main\Engine\Action;
use Bitrix\Main\Engine\Response\DataType\Page;
use Bitrix\Main\Result;
use Bitrix\Main\UI\PageNavigation;
 
abstract class Base extends Product
{
    protected const TYPE = '';
 
    abstract protected function getAllowedProductTypes();
 
    protected function processBeforeAction(Action $action)
    {
        $arguments = $action->getArguments();
        $name = $action->getName();
 
        if ($name === 'getfieldsbyfilter')
        {
            $arguments['filter']['productType'] = static::TYPE;
            $action->setArguments($arguments);
        }
 
        return parent::processBeforeAction($action);
    }
 
    private function isAllowedProductTypeByIBlockId(Engine\Action $action): Result
    {
        $arguments = $action->getArguments();
        $fields = $arguments['fields'];
 
        $view = $this->getViewManager()->getView($this);
        return $view->isAllowedProductTypeByIBlockId(static::TYPE, $fields['iblockId']);
    }
 
    protected function processBeforeAdd(Engine\Action $action): Result
    {
        $r = parent::processBeforeAdd($action);
 
        if ($r->isSuccess())
        {
            $r = $this->isAllowedProductTypeByIBlockId($action);
        }
 
        return $r;
    }
 
    protected function processBeforeUpdate(Action $action): Result
    {
        $r = parent::processBeforeUpdate($action);
 
        if ($r->isSuccess())
        {
            $r = $this->isAllowedProductTypeByIBlockId($action);
        }
 
        return $r;
    }
 
    protected function fillKeyResponse($result): ?array
    {
        return is_null($result) ? $result : [$this->getServiceItemName() => current($result)];
    }
 
    public function addAction($fields): ?array
    {
        $fields['TYPE'] = static::TYPE;
        $result = parent::addAction($fields);
 
        return $this->fillKeyResponse($result);
    }
 
    public function updateAction($id, array $fields): ?array
    {
        $result = parent::updateAction($id, $fields);
 
        return $this->fillKeyResponse($result);
    }
 
    public function listAction(PageNavigation $pageNavigation, array $select = [], array $filter = [], array $order = []): ?Page
    {
        $view = $this->getViewManager()->getView($this);
        $r = $view->isAllowedProductTypeByIBlockId(static::TYPE, $filter['IBLOCK_ID']);
        if (!$r->isSuccess())
        {
            $this->addErrors($r->getErrors());
 
            return null;
        }
 
        $list = $this->getAllowedProductTypes();
 
        if (isset($filter['TYPE']))
        {
            $filter['TYPE']  = in_array($filter['TYPE'], $list, true) ? $filter['TYPE'] : $list;
        }
        else
        {
            $filter['TYPE'] = $list;
        }
 
        return parent::listAction($pageNavigation, $select, $filter, $order);
    }
 
    protected function get($id)
    {
        $result = parent::get($id);
 
        if (empty($result) === false)
        {
            if (in_array($result['TYPE'], $this->getAllowedProductTypes()))
            {
                return $result;
            }
        }
 
        return false;
    }
}