/**
* Returns a bencoded string that represents a .torrent file and can be
* read by BitTorrent clients.
*
* First item in the $announce_list will be used in the 'announce' key of
* the .torrent file, which is compatible with the BitTorrent specification
* ('announce-list' is an unofficial extension).
*
* @return string
*/
public function createTorrentFile()
{
$torrent_data = array();
// Info
self::addDataToTorrentFile($torrent_data, 'info', $this->getInfo());
// Announce-list/Nodes
if (self::addDataToTorrentFile($torrent_data, 'announce-list', Utils::listToListOfLists($this->announce_list))) {
self::addDataToTorrentFile($torrent_data, 'announce', reset($this->announce_list));
} else {
self::addDataToTorrentFile($torrent_data, 'nodes', $this->nodes);
}
// Url-list
self::addDataToTorrentFile($torrent_data, 'url-list', $this->url_list);
// Created by
self::addDataToTorrentFile($torrent_data, 'created-by', $this->created_by);
return Builder::build($torrent_data);
}