private function findRequestedAlbum($params)
{
if (empty($params['albumId'])) {
if (empty($params['userId']) || empty($params['albumTitle'])) {
return null;
}
$album = $this->albumService->findAlbumByName($params['albumTitle'], $params['userId']);
} else {
$album = $this->albumService->findAlbumById($params['albumId']);
}
return $album;
}