public function callback()
{
if (!$this->id) {
throw new Exception('Movie does not exists yet');
}
if ($this->callback_at) {
throw new Exception('Movie callback already executed');
}
$arr_infos = Callback::decode(Callback::getMovieInfo($this->tmdb_id));
$arr_infos = array_shift($arr_infos);
$this->addMovieImages(array_merge($arr_infos['posters'], $arr_infos['backdrops']));
unset($arr_infos['posters']);
unset($arr_infos['backdrops']);
$this->addMovieAttributes($arr_infos);
$this->callback_at = time();
$this->save();
$this->getRelated('attributes', true);
$this->getRelated('images', true);
}