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Youtube Playlists Sorted Alphabetically

When you click on "+ Add to" (for adding a new video to a playlist) YouTube displays the playlists -by default- in a strange order: beginning with the one selected last. This script arranges your playlists alphabetically, making it easier for you to find the one you are looking for.

As of 09.07.2015. See ბოლო ვერსია.

// ==UserScript==
// @name           Youtube Playlists Sorted Alphabetically
// @namespace      http://www.pbworks.net
// @description	   When you click on "+ Add to" (for adding a new video to a playlist) YouTube displays the playlists -by default- in a strange order: beginning with the one selected last. This script arranges your playlists alphabetically, making it easier for you to find the one you are looking for.
// @author         Paolo Brocco
// @homepage       http://www.pbworks.net
// @copyright      2012+, Paolo Brocco (http://www.pbworks.net)
// @license        GPL version 3 or any later version; http://www.gnu.org/copyleft/gpl.html
// @version        2015.07.09
// @include        http://www.youtube.com/*
// @include        https://www.youtube.com/*
// @uso:script     123272
// ==/UserScript==

/*** DOCUMENT READY: triggers (buttons) with added calls to this script functions ***/

document.addEventListener('DOMContentLoaded', function() {
    //here begins everything

    //This is the "Add to" button
    document.querySelector('#watch8-secondary-actions > div.yt-uix-menu.yt-uix-videoactionmenu > button').setAttribute('onclick', ';initSortLists();return false;');
}, false);

/*** INIT FUNCTIONS: logic to decide when to activate the sorting ***/

unsafeWindow.initSortLists = function(){

	//this function checks if the menu is ready (ready I mean: if the ul list has children (li) (youtube populates the list via ajax, then shows it) ):
	//if ready: call sortLists()
	//else: wait for 100 ms
    
    var container = document.querySelector('#addto-list-panel > div.playlists.yt-uix-scroller > ul');

	if(typeof container !== 'undefined' && container != null)
	{
		//unsafeWindow.console.log('the menu is ready!');
		
		if (!container.classList.contains('sorted'))
		{
            var lists = container.querySelectorAll('li');

            if (lists.length > 0) {
                //unsafeWindow.console.log('playlists arrived, sorting them.');
                unsafeWindow.sortLists();
            }
            else {
                setTimeout('initSortLists()', 100);
            }
		}
		else
		{
			//unsafeWindow.console.log('playlists already sorted ;)');
		}
		return false;
	}
	else
	{
		//unsafeWindow.console.log('waiting 100 ms...');
		setTimeout('initSortLists()', 100);
	}
}

/*** SORTING FUNCTIONS ***/

unsafeWindow.sortLists = function(){
	
	//this function does what we want, meaning the sorting of the playlists, alphabetically
	
	//unsafeWindow.console.log('doing the magic!');

    var oldList = document.querySelector('#addto-list-panel > div.playlists.yt-uix-scroller > ul');

    var listParent = oldList.parentNode;

	var plists = [];
	var lTitle, lElement, newList;

    var lists = document.querySelectorAll('#addto-list-panel > div.playlists.yt-uix-scroller > ul li');

    [].forEach.call(lists, function(li) {

        unsafeWindow.console.log('a list');

        lTitle = li.getAttribute('data-item-name');
        lElement = li;

        plists.push(listData(lTitle, li));
    });

	plists.sort(SortByTitle);

    newList = document.createElement('ul');
    newList.setAttribute('role', 'menu');
    newList.setAttribute('tabindex', '0');
    newList.setAttribute('class', 'yt-uix-kbd-nav yt-uix-kbd-nav-list sorted');
	
	for (p in plists)
	{
        newList.appendChild(plists[p].lElement);
	}
	
    listParent.replaceChild(newList, oldList);
}

/*** HELPERS ***/

//This will sort an array
function SortByTitle(a, b){
    var aName = a.title.toLowerCase();
    var bName = b.title.toLowerCase();
    return ((aName < bName) ? -1 : ((aName > bName) ? 1 : 0));
}

//function to populate lists data array
function listData(title, lElement) {
    return {
        title: title,
        lElement: lElement
    }
}