/**
* Generates filename for new file according to storage's configuration.
* @param string|null $originFilename name of origin file.
* If `saveOriginNames` is true the storage will analyse and use this property for new filename.
* Otherwise the storage will analyse and use only extension from this property.
* @return string generated new filename.
*/
public function createNewFilename($originFilename = null)
{
if ($originFilename !== null) {
$extension = FileSystemHelper::extension($originFilename);
$extension = FileSystemHelper::normalizeFilename($extension);
if (!$this->isValidExtension($extension)) {
$extension = null;
}
if ($this->saveOriginNames) {
$filename = FileSystemHelper::filename($originFilename);
$filename = FileSystemHelper::normalizeFilename($filename);
if (!$this->isValidFileName($filename)) {
$filename = null;
}
} else {
$filename = null;
}
$charset = Yii::$app->charset;
if ($filename !== null) {
if (mb_strlen($extension === null ? $filename : "{$filename}.{$extension}", $charset) > $this->maxLength) {
$filename = null;
}
}
if ($filename === null && $extension !== null) {
if ($this->fileNamesLength + 1 + mb_strlen($extension, $charset) > $this->maxLength) {
$extension = null;
}
}
}
if (!isset($filename)) {
$filename = $this->generateRandomString($this->fileNamesLength);
}
return isset($extension) ? "{$filename}.{$extension}" : $filename;
}
