restrictexternaluser.php

См. документацию.

<?php
 
namespace Bitrix\Calendar\Controller\Filter;
 
use Bitrix\Main\Engine\ActionFilter\Base;
use Bitrix\Main\Error;
use Bitrix\Main\Event;
use Bitrix\Main\EventResult;
use Bitrix\Main\Loader;
 
final class RestrictExternalUser extends Base
{
    public function onBeforeAction(Event $event)
    {
        if (Loader::includeModule('intranet') && !\Bitrix\Intranet\Util::isIntranetUser())
        {
            $this->addError(new Error('Access denied'));
 
            return new EventResult(type: EventResult::ERROR, handler: $this);
        }
 
        return null;
    }
}