private function writeLyrics(Song $song)
{
$lyricTrack = null;
$tracks = $song->getTracks();
foreach ($tracks as $track) {
if (!$track->getLyrics()->isEmpty()) {
$lyricTrack = $track;
break;
}
}
$this->writeInt($lyricTrack == null ? 0 : $lyricTrack->getNumber());
$this->writeInt($lyricTrack == null ? 0 : $lyricTrack->getLyrics()->getFrom());
$this->writeStringInteger($lyricTrack == null ? '' : $lyricTrack->getLyrics()->getLyrics());
for ($i = 0; $i < 4; $i++) {
$this->writeInt($lyricTrack === null ? 0 : 1);
$this->writeStringInteger('');
}
}