public function __invoke(Upload $upload, $generate_thumb = false)
{
$download_pattern_uri = $generate_thumb ? $this->booothy_thumb_download_uri : $this->booothy_download_uri;
$download_pattern = sprintf('%s/%s', $this->booothy_url, $download_pattern_uri);
return preg_replace('/{filename}/', $upload->filename(), $download_pattern);
}
