/**
* Collects the information to be cached in sys_file
*
* @param string $identifier
* @return array
*/
protected function gatherFileInformationArray($identifier)
{
$fileInfo = $this->storage->getFileInfoByIdentifier($identifier);
$fileInfo = $this->transformFromDriverFileInfoArrayToFileObjectFormat($fileInfo);
$fileInfo['type'] = $this->getFileType($fileInfo['mime_type']);
$fileInfo['sha1'] = $this->storage->hashFileByIdentifier($identifier, 'sha1');
$fileInfo['extension'] = \TYPO3\CMS\Core\Utility\PathUtility::pathinfo($fileInfo['name'], PATHINFO_EXTENSION);
$fileInfo['missing'] = 0;
return $fileInfo;
}