app\models\Album::get PHP Method

    public static function get(Artist $artist, $name, $isCompilation = false)
    {
        // If this is a compilation album, its artist must be "Various Artists"
        if ($isCompilation) {
            $artist = Artist::getVarious();
        }
        return self::firstOrCreate(['artist_id' => $artist->id, 'name' => $name ?: self::UNKNOWN_NAME]);
    }

 /**
  * Sync a song with all available media info against the database.
  *
  * @param SplFileInfo $file The SplFileInfo instance of the file.
  *
  * @return bool|Song A Song object on success,
  *                   true if file existing but unmodified,
  *                   or false on error.
  */
 public function syncFile(SplFileInfo $file)
 {
     if (!($info = $this->getInfo($file))) {
         return false;
     }
     if (!$this->isNewOrChanged($file)) {
         return true;
     }
     $artist = Artist::get($info['artist']);
     $album = Album::get($artist, $info['album']);
     if ($info['cover'] && !$album->has_cover) {
         try {
             $album->generateCover($info['cover']);
         } catch (Exception $e) {
             Log::error($e);
         }
     }
     $info['album_id'] = $album->id;
     unset($info['artist']);
     unset($info['album']);
     unset($info['cover']);
     $song = Song::updateOrCreate(['id' => $this->getHash($file->getPathname())], $info);
     $song->save();
     return $song;
 }