SwitchBackUserHook.php

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<?php
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
namespace ‪TYPO3\CMS\Beuser\Hook;
 
use ‪TYPO3\CMS\Backend\Routing\UriBuilder;
use ‪TYPO3\CMS\Beuser\Domain\Repository\BackendUserSessionRepository;
use ‪TYPO3\CMS\Core\Authentication\AbstractUserAuthentication;
use ‪TYPO3\CMS\Core\Authentication\BackendUserAuthentication;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
use ‪TYPO3\CMS\Core\Utility\HttpUtility;
use ‪TYPO3\CMS\Extbase\Object\ObjectManager;
 
class ‪SwitchBackUserHook
{
    public function ‪switchBack($params, ‪AbstractUserAuthentication $authentication)
    {
        if ($this->‪isAHandledBackendSession($authentication)) {
            $objectManager = GeneralUtility::makeInstance(ObjectManager::class);
            $backendUserSessionRepository = $objectManager->get(BackendUserSessionRepository::class);
            $backendUserSessionRepository->switchBackToOriginalUser($authentication);
            $uriBuilder = GeneralUtility::makeInstance(UriBuilder::class);
            ‪HttpUtility::redirect((string)$uriBuilder->buildUriFromRoute('main'));
        }
    }
 
    protected function ‪isAHandledBackendSession(‪AbstractUserAuthentication $authentication)
    {
        return ($authentication instanceof ‪BackendUserAuthentication)
            && is_array($authentication->user)
            && (int)$authentication->user['uid'] > 0
            && (int)$authentication->user['ses_backuserid'] > 0;
    }
}