oldschoolshuffle

spotifyFunctions.js

function convertPlaylistToObjectByProperty(simplifiedPlaylist, propertyName){
    //use to group large array of tracks into smaller arrays of tracks from same album
    //this lets us easily sort tracks for a single album, then do a for..in loop
    //over each albumId as an object key and combine the arrays back together
    let playlistObject = {};
    //eslint-disable-next-line
    simplifiedPlaylist.map((track) => {
        if (!playlistObject[track[propertyName]]) {
            playlistObject[track[propertyName]] = [];
        }
        playlistObject[track[propertyName]].push(track)
    })
    //now sort the array in each property by trackNumber, so tracks play in the same order as the album
    for (let relatedTrackArray in playlistObject) {
        playlistObject[relatedTrackArray].sort(dynamicSort('trackNumber'));
    }
    return playlistObject
}