FileLinktype.php

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<?php
namespace TYPO3\CMS\Linkvalidator\Linktype;

/*
 * 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!
 */

use TYPO3\CMS\Core\Resource\Exception\FileDoesNotExistException;
use TYPO3\CMS\Core\Resource\Exception\FolderDoesNotExistException;
use TYPO3\CMS\Core\Resource\ResourceFactory;
use TYPO3\CMS\Core\Utility\GeneralUtility;

class FileLinktype extends AbstractLinktype
{
    public function fetchType($value, $type, $key)
    {
        if (strpos(strtolower($value['tokenValue']), 'file:') === 0) {
            $type = 'file';
        }
        return $type;
    }

    public function checkLink($url, $softRefEntry, $reference)
    {
        $resourceFactory = GeneralUtility::makeInstance(ResourceFactory::class);
        try {
            $file = $resourceFactory->retrieveFileOrFolderObject($url);
        } catch (FileDoesNotExistException $e) {
            return false;
        } catch (FolderDoesNotExistException $e) {
            return false;
        }

        return ($file !== null) ? !$file->isMissing() : false;
    }

    public function getErrorMessage($errorParams)
    {
        return $this->getLanguageService()->getLL('list.report.filenotexisting');
    }

    public function getBrokenUrl($row)
    {
        return GeneralUtility::getIndpEnv('TYPO3_SITE_URL') . $row['url'];
    }
}