Creating favourite songs playlists for archiving

[ultrlight]

Hello, firstly I would like to thank you for this program! I am attempting to collect an archive of my Spotify favourites by making the following playlists :

1. A playlist that logs every song I have ever added to my favourite songs.
2. A playlist that logs all the songs that I remove from my favourite songs.
3. A playlist that shows my favourite songs at present.

I have managed to make Playlist 3 successfully. I would like advice on how to write the first two playlists in a simple way. Apologies if anything doesn't make sense, please let me know. :)

[Chimildic]

Set trigger to function logFavoriteSongs (is saving snapshot of present favorite tracks and append to last with dedup).
In dependence from your activity choose period. If every day, tracks that liked and removed in one day dont push to cache. You can set an hour. But such fleeting tracks dont make sense. In case day of week can lost many tracks that liked and removed before to create new snapshot.

Constant COUNT_TRACKS is how many last favorite tracks need to check. If you can save more than 50 tracks in trigger period, increase value. And insert id for playlist with ban tracks.

function logFavoriteSongs() {
  const FILENAME = 'ArchiveFavoriteSongs';
  const COUNT_TRACKS = 50;

  let banTracks = Source.getPlaylistTracks('', 'id');
  let archiveTracks = Cache.read(FILENAME);
  let currentTracks = Source.getSavedTracks(archiveTracks.length > 0 ? COUNT_TRACKS : undefined);

  Combiner.push(archiveTracks, currentTracks);
  Filter.dedupTracks(archiveTracks);
  Filter.removeTracks(archiveTracks, banTracks);
  Cache.write(FILENAME, archiveTracks);

  Library.checkFavoriteTracks(archiveTracks);
  let obj = archiveTracks.reduce((obj, track) => {
    track.isFavorite ? obj.saved.push(track) : obj.unsaved.push(track);
    return obj;
  }, { saved: [], unsaved: [] })

  Order.sort(archiveTracks, 'meta.added_at', 'asc');
  Order.sort(obj.unsaved, 'meta.added_at', 'asc');
  Order.sort(obj.saved, 'meta.added_at', 'asc');

  save('All favorite', archiveTracks);
  save('Removed favorite', obj.unsaved);
  save('Present favorite', obj.saved);

  function save(name, tracks, id) {
    Playlist.saveWithUpdate({
      //id: id,
      name: name,
      tracks: tracks,
      randomCover: 'update',
      public: false,
      toEnd: true,
    });
  }
}

[ultrlight]

My mistake, thank you for noticing this! So, if Cache.remove is incorrect, how do I fix the code to remove banTracks from all of the playlists?

To answer your questions, oldArchiveTracks is a static playlist that I am not using anymore. I would just like to move the tracks from oldArchiveTracks to the 'All favourite' playlist. I would also like to use saveWithUpdate to save added date in order.

[Chimildic]

oldArchiveTracks need to playlist removed favorite?

[ultrlight]

Yes please, I would like to add the favourite songs which I removed from oldArchiveTracks to the Removed favourites playlist.

[Chimildic]

Run the next function once. The main function was edited on post.

function runOnce(){
  let currentTracks = Source.getSavedTracks();
  let oldTracks = Source.getPlaylistTracks('', 'id');
  Combiner.push(currentTracks, oldTracks);
  Filter.dedupTracks(currentTracks);
  Order.sort(currentTracks, 'meta.added_at', 'asc');
  Cache.write('ArchiveFavoriteSongs', currentTracks);
}

[ultrlight]

I've tested it and it's working perfectly, thank you so much for your help! :)