Duplicate finder for google play music

README.md

Instructions

1. Copy the code above (I recommend clicking the 'Raw' button to get at it more easily)
2. Open all your music
3. Zoom out as far as you can.
4. Open up the Menu > Tools > Developer > JavaScript Console
5. Paste in the code, and hit Enter.

googlePlayMusic.duplicateFinder.js

// Configuration!
var numericKeys = ['track', 'play-count'];
var matchKeys = ['title','album','artist'];
var caseSensitive = false;

// Don't change anything below here...
var hasJquery = typeof $ !== 'undefined' && $.jQuery;
if(!hasJquery) {
    console.info('Waiting for jQuery to load...');
    (function(){var d=document;var h=d.getElementsByTagName('head')[0];var s=d.createElement('script');s.src='//code.jquery.com/jquery-2.1.0.min.js';h.appendChild(s);}());
}
setTimeout(function() {
    hasJquery = typeof $ !== 'undefined' && $.jQuery;
    console.info('Finding duplicates...');
    function getSongsFromView() {
        var songs = [];
        $('.song-row').each(function(i, x) {
            var song = { id: $(x).data('id'), row: $(x) };
            $('[data-col]', x).each(function(i, x) {
                var $x = $(x);
                var val = $x.text().trim();
                var key = $x.data('col');
                if(numericKeys.indexOf(key) > -1) {
                    val = parseInt(val, 10);
                    if(isNaN(val)) {
                        val = 0;
                    }
                }
                song[key] = val;
            });
            songs.push(song);
        });
        return songs;
    }

    function getDuplicates(songs, keys, caseSensitive) {
        var seen = [];
        keys = keys && keys.length ? keys : ['title'];
        return songs.reduce(function(dupes, curr) {
            seen.forEach(function(prev) {
                if(songsMatchOn(curr, prev, keys)) {
                    curr._duplicateOf = prev;
                    dupes.push(curr);
                }
            });
            seen.push(curr);
            return dupes;
        }, []);
    }

    function songsMatchOn(a, b, keys, caseSensitive) {
        return keys.every(function(key) {
            if(caseSensitive || typeof a[key] !== 'string' || typeof b[key] !== 'string') {
                return a[key] === b[key];
            }
            return a[key].toLowerCase() === b[key].toLowerCase();
        });
    }

    function enqueueClick(song, index) {
        var target = $('[data-col="title"]', song.row).eq(0)[0];
        var myEvent = document.createEvent('MouseEvents');
        myEvent.initMouseEvent('click', true, true, target, 0, 0, 0, 1, 1, index > 0, false, false, false, 0, null);
        target.dispatchEvent(myEvent);
    }

    var visibleSongs = getSongsFromView();
    var dupes = getDuplicates(visibleSongs, matchKeys, caseSensitive);

    if(dupes.length) {
        console.group('Found', dupes.length, 'duplicates, matching on ', matchKeys.join('/'));
        dupes.forEach(function(song, index) {
            console.log(index, song);
            enqueueClick(song, index);        
        });
        console.groupEnd();
    } else {
        console.info('No duplicates found!');
    }
}, hasJquery ? 1 : 10000);