SvgTypeCheck.php

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<?php
 
declare(strict_types=1);
 
/*
 * 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\Core\Resource\Security;
 
use ‪TYPO3\CMS\Core\Resource\FileInterface;
use ‪TYPO3\CMS\Core\Resource\MimeTypeDetector;
use ‪TYPO3\CMS\Core\Type\File\FileInfo;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
 
class ‪SvgTypeCheck
{
    protected const ‪MIME_TYPES = ['image/svg', 'image/svg+xml', 'application/svg', 'application/svg+xml'];
 
    protected ‪$mimeTypeDetector;
 
    protected ‪$fileExtensions;
 
    public function ‪__construct(‪MimeTypeDetector ‪$mimeTypeDetector)
    {
        $this->mimeTypeDetector = ‪$mimeTypeDetector;
        $this->fileExtensions = $this->‪resolveFileExtensions();
    }
 
    public function ‪forFilePath(string $filePath): bool
    {
        $fileInfo = GeneralUtility::makeInstance(FileInfo::class, $filePath);
        $fileExtension = $fileInfo->getExtension();
        $mimeType = $fileInfo->getMimeType();
        return in_array($fileExtension, $this->fileExtensions, true)
            || in_array($mimeType, self::MIME_TYPES, true);
    }
 
    public function ‪forResource(‪FileInterface $file): bool
    {
        $fileExtension = $file->getExtension();
        $mimeType = $file->getMimeType();
        return in_array($fileExtension, $this->fileExtensions, true)
            || in_array($mimeType, self::MIME_TYPES, true);
    }
 
    protected function ‪resolveFileExtensions(): array
    {
        ‪$fileExtensions = array_map(
            function (string $mimeType): array {
                return $this->mimeTypeDetector->getFileExtensionsForMimeType($mimeType);
            },
            ‪self::MIME_TYPES
        );
        ‪$fileExtensions = array_filter(‪$fileExtensions);
        return count(‪$fileExtensions) > 0 ? array_unique(array_merge(...‪$fileExtensions)) : [];
    }
}