AbstractHierarchicalFilesystemDriver.php

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<?php
namespace TYPO3\CMS\Core\Resource\Driver;

abstract class AbstractHierarchicalFilesystemDriver extends AbstractDriver {

    protected function isPathValid($theFile) {
        return \TYPO3\CMS\Core\Utility\GeneralUtility::validPathStr($theFile);
    }

    protected function canonicalizeAndCheckFilePath($filePath) {
        $filePath = \TYPO3\CMS\Core\Utility\PathUtility::getCanonicalPath($filePath);

        // filePath must be valid
        // Special case is required by vfsStream in Unit Test context
        if (!$this->isPathValid($filePath) && substr($filePath, 0, 6) !== 'vfs://') {
            throw new \TYPO3\CMS\Core\Resource\Exception\InvalidPathException('File ' . $filePath . ' is not valid (".." and "//" is not allowed in path).', 1320286857);
        }
        return $filePath;
    }

    protected function canonicalizeAndCheckFileIdentifier($fileIdentifier) {
        if ($fileIdentifier !== '') {
            $fileIdentifier = $this->canonicalizeAndCheckFilePath($fileIdentifier);
            $fileIdentifier = '/' . ltrim($fileIdentifier, '/');
            if (!$this->isCaseSensitiveFileSystem()) {
                $fileIdentifier = strtolower($fileIdentifier);
            }
        }
        return $fileIdentifier;
    }

    protected function canonicalizeAndCheckFolderIdentifier($folderPath) {
        if ($folderPath === '/') {
            $canonicalizedIdentifier = $folderPath;
        } else {
            $canonicalizedIdentifier = rtrim($this->canonicalizeAndCheckFileIdentifier($folderPath), '/') . '/';
        }
        return $canonicalizedIdentifier;
    }

    public function getParentFolderIdentifierOfIdentifier($fileIdentifier) {
        $fileIdentifier = $this->canonicalizeAndCheckFileIdentifier($fileIdentifier);
        return \TYPO3\CMS\Core\Utility\PathUtility::dirname($fileIdentifier) . '/';
    }


}