BackendModuleController.php

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<?php
namespace TYPO3\CMS\Install\Controller;

/*
 * 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!
 */

class BackendModuleController extends \TYPO3\CMS\Extbase\Mvc\Controller\ActionController
{
    protected $enableFileService;

    protected $formProtection;

    public function injectEnableFileService(\TYPO3\CMS\Install\Service\EnableFileService $enableFileService)
    {
        $this->enableFileService = $enableFileService;
    }

    public function initializeAction()
    {
        $this->formProtection = \TYPO3\CMS\Core\FormProtection\FormProtectionFactory::get();
    }

    public function indexAction()
    {
        if ($this->enableFileService->checkInstallToolEnableFile()) {
            $this->redirect('sysext/install/Start/Install.php?install[context]=backend');
        } else {
            $this->forward('showEnableInstallToolButton');
        }
    }

    public function showEnableInstallToolButtonAction()
    {
        $token = $this->formProtection->generateToken('installTool');
        $this->view->assign('installToolEnableToken', $token);
    }

    public function enableInstallToolAction($installToolEnableToken)
    {
        if (!$this->formProtection->validateToken($installToolEnableToken, 'installTool')) {
            throw new \RuntimeException('Given form token was not valid', 1369161225);
        }
        $this->enableFileService->createInstallToolEnableFile();
        $this->forward('index');
    }

    protected function redirect($uri)
    {
        \TYPO3\CMS\Core\Utility\HttpUtility::redirect($uri);
    }
}