gplay-playlist-export.js

// Setup
var tracklistObj = {},
    currentPlaylist,
    checkIntervalTime = 100,
    lastTime;

// Process the visible tracks
function getVisibleTracks() {
    var playlist = document.querySelectorAll('.song-table tr.song-row');
    for(var i = 0; i < playlist.length ; i++) { 
        var l = playlist[i],
            title = l.querySelector('td[data-col="title"] .column-content').textContent,
            artist = l.querySelector('td[data-col="artist"] .column-content').textContent,
            album = l.querySelector('td[data-col="album"] .column-content').textContent,

        // Add it if it doesn't exist already 
        entry = artist + " - " + title + ' - ' + album;
        if (printTrace && i == 1) {
        	//console.log(entry);
		//console.log(currentPlaylist);
	}
        if(tracklistObj[currentPlaylist] && !tracklistObj[currentPlaylist].includes(entry)) {
            tracklistObj[currentPlaylist].push(entry);

            if(printTracksToConsole) {
                console.log(entry);
            }
        }
    }
}

// Listen for page changes
window.onhashchange = function(e) {
    currentPlaylist = null; 

    var doneLoading = setInterval(function() {
        var playListName = document.querySelector('.gpm-detail-page-header h2[slot="title"]');
        if(playListName != null) {
            currentPlaylist = playListName.innerText;
            if(tracklistObj[currentPlaylist] === undefined) {
                tracklistObj[currentPlaylist] = [];
            }

            console.log("===================================");
            console.log("Adding to playlist " + currentPlaylist);

            getVisibleTracks();

            clearInterval(doneLoading);
        } else {
		console.log('NULL PLAYLIST')
	}
    }, 100);

}

// Check for new tracks every so often
setInterval(function() {
    getVisibleTracks();
}, checkIntervalTime);

// Whether or not to print the tracks obtained to the console
var printTracksToConsole = true;
var printTrace = false;