private function getNativeTimestamp(FileSystemInfo $info, $searchOptions = self::WITHOUT_CONTENT)
{
if ($info instanceof FileInfo) {
$timestamp = $info->getLastWriteTime();
$this->cache->save($info->getFullName(), $timestamp);
return $timestamp;
} else {
$directorySearchOptions = $searchOptions == self::WITHOUT_CONTENT ? DirectoryInfo::TOP_DIRECTORY_ONLY : DirectoryInfo::ALL_DIRECTORIES;
$innerInfos = $info->getFileSystemInfos($directorySearchOptions);
$timestamp = $info->getLastWriteTime();
foreach ($innerInfos as $innerInfo) {
$innerTimestamp = $this->getTimestampHelper($innerInfo, $searchOptions);
$timestamp = max($innerTimestamp, $timestamp);
}
$this->cache->save($info->getFullName(), $timestamp);
return $timestamp;
}
}
