protected function getSeriesExtra(array $ser) : array
{
$ser['prev_link'] = $this->getSeriesLink((int) $ser['seriesid'], (int) $ser['listorder'], 'prev');
$ser['next_link'] = $this->getSeriesLink((int) $ser['seriesid'], (int) $ser['listorder'], 'next');
$ser['config'] = \json_decode($ser['config'], true);
return $ser;
}