parrot list users

var groupsToList = ["bureaucrat", "sysop", "rollback", "chatmoderator", "bot"],
    users = {};
function listGroups(list, cb) {
    if (list.length > 0) {
        var group = list.shift();
        $.getJSON("/api.php?action=query&format=json&list=allusers&augroup=" + group + "&aulimit=max&cb=" + new Date().getTime(), function(data) {
            console.log(data);
            for (var i in data.query.allusers) {
                var a = data.query.allusers[i];
                users[a.name] = users[a.name] || [];
                users[a.name].push(group);
            }
            listGroups(list, cb);
        });
    } else {
        cb();
    }
}
function sortGroups() {
    for (var i in users) {
        var user = users[i],
            a = [];
        for (var j in groupsToList) {
            if (user.indexOf(groupsToList[j]) > -1) {
                a.push(groupsToList[j]);
            }
        }
        user = a;
    }
}
listGroups(groupsToList.concat(), function() {
    for (var i in users) {
        sortGroups(users[i]);
    }
    // do something with 'users'
});