owncloud / music

	 * @param string $userId

	 * @return integer

	 */

	public function countByArtist($artistId, $userId){

		$sql = 'SELECT COUNT(*) AS count FROM `*PREFIX*music_tracks` `track` '.

			'WHERE `track`.`user_id` = ? AND `track`.`artist_id` = ?';

		$params = array($userId, $artistId);

		$result = $this->execute($sql, $params);

		$row = $result->fetch();

		return $row['count'];

	}

	/**

	 * @param integer $albumId

	 * @param string $userId

	 * @return integer

	 */

	public function countByAlbum($albumId, $userId){

		$sql = 'SELECT COUNT(*) AS count FROM `*PREFIX*music_tracks` `track` '.

			'WHERE `track`.`user_id` = ? AND `track`.`album_id` = ?';

		$params = array($userId, $albumId);

		$result = $this->execute($sql, $params);

		$row = $result->fetch();

		return $row['count'];

	}

	/**

	 * @param string $name

	/**

	 * @param string $userId

	 */

	public function count($userId){

		$sql = 'SELECT COUNT(*) AS count FROM `' . $this->getTableName() . '` '.

			'WHERE `user_id` = ?';

		$params = array($userId);

		$result = $this->execute($sql, $params);

		$row = $result->fetch();

		return $row['count'];

	}

	/**

	 * helper creating a string like '(?,?,?)' with the specified number of elements