Make playlists either public or private from user side

I have two tables playlists and playlist_songs in database.Recently playlist is managed by authority, but now i want to allow user to make their own playlists and the playlist can either be public or be private depending on user's choice. So, how can I design schema for that, and how can i make public-playlists visible to other users, and how to hide private-playlists from other user? please suggest me, any help would be appreciated.

via Chebli Mohamed