This is a simple Node.js program to automatically archive Spotify's Discover Weekly playlist.
I'm currently running it with a cron job to save all of Spotify's recommendations as they come out each week. It makes use of the request-promise library to make an asynchronous language synchronous (and to reduce nested callbacks).
To backup your Discover Weekly playlist, adjust the variables at the top of the spotify.js file.
<USER-ID> is the name on your Spotify profile e.g Millais
Create an app on Spotify Developer to get a <CLIENT-ID> and <CLIENT-SECRET>.
Generate a <REFRESH-TOKEN> by authorising with Spotify. Make sure to use the playlist-read-private and playlist-modify-private scopes. The refresh token can pretty much be considered as valid forever.
<DISCOVER-PLAYLIST-ID> is your Discover Weekly playlist URI e.g 37i9dQZEVXcM6Vy4lcP1Nn
<ARCHIVE-PLAYLIST-ID> is the URI of your archive playlist.
Almost there...
npm install
then
node spotify.js