FolderMountsRestriction.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\Search\QueryRestrictions;
 
use ‪TYPO3\CMS\Core\Authentication\BackendUserAuthentication;
use ‪TYPO3\CMS\Core\Database\Query\Expression\CompositeExpression;
use ‪TYPO3\CMS\Core\Database\Query\Expression\ExpressionBuilder;
use ‪TYPO3\CMS\Core\Database\Query\Restriction\AbstractRestrictionContainer;
use ‪TYPO3\CMS\Core\Resource\Folder;
use ‪TYPO3\CMS\Core\Resource\ResourceFactory;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
 
class ‪FolderMountsRestriction extends ‪AbstractRestrictionContainer
{
    private ‪$backendUser;
 
    private ‪$folderMounts;
 
    public function ‪__construct(‪BackendUserAuthentication ‪$backendUser)
    {
        $this->backendUser = ‪$backendUser;
        $this->‪populateRestrictions();
    }
 
    private function ‪populateRestrictions(): void
    {
        if ($this->backendUser->isAdmin()) {
            return;
        }
        foreach ($this->‪getFolderMounts() as $folder) {
            $this->‪add(new ‪FolderRestriction($folder, true));
        }
    }
 
    public function ‪buildExpression(array $queriedTables, ExpressionBuilder $expressionBuilder): CompositeExpression
    {
        if (!$this->backendUser->isAdmin() && empty($this->‪getFolderMounts())) {
            // If the user isn't an admin but has no mounted folders, add an expression leading to an empty result
            return $expressionBuilder->and('1=0');
        }
        $constraints = [];
        foreach ($this->restrictions as $restriction) {
            $constraints[] = $restriction->buildExpression($queriedTables, $expressionBuilder);
        }
        return $expressionBuilder->or(...$constraints);
    }
 
    private function ‪getFolderMounts(): array
    {
        if ($this->folderMounts !== null) {
            return ‪$this->folderMounts;
        }
        $this->folderMounts = [];
        $fileMounts = $this->backendUser->getFileMountRecords();
        foreach ($fileMounts as $fileMount) {
            $this->folderMounts[] = GeneralUtility::makeInstance(ResourceFactory::class)->getFolderObjectFromCombinedIdentifier($fileMount['identifier'] ?? '');
        }
 
        return ‪$this->folderMounts;
    }
}