Follows everyone's followers

twitter-bulk-follow.js

/*
 * To be executed in the followers page of somebody.
 *
 */
(function() {
    // time between clicks
    var TW_CLICK_DELAY = 1000;
    // time between scrolls
    var TW_SCROLL_DELAY = 100;
    // how many people follow in  this batch
    var TW_FOLLOW = 100;
    // display console msgs?
    var TW_VERBOSE = true;

    /*
     * Internal
     */
    var tw_timeoutHandler;
    var tw_followed;
    var tw_stop;

    /*
     * Start follow batch
     */
    function start(first) {
        if(first) {
            tw_followed = 0;
            tw_stop = false;
        } else if(tw_stop) {
            return;
        }

        var button = $('.not-following .user-actions-follow-button').first();
        if(button.length != 0) {
            button.click();
            tw_followed++;

            if(TW_VERBOSE) {
                var user = '@' + button.parent().data('screen-name');
                console.log('Following ' + user + '(' + tw_followed + '/' + TW_FOLLOW + ')');
            }
        } else {
            var currentScroll = window.scrollY;
            window.scroll(0, $(document).height());
            if(window.scrollY === currentScroll) {
                console.log('Finished');
            } else {
                timeoutHandler = setTimeout(function() { start(false) }, TW_SCROLL_DELAY);
                return;
            }
        }

        if(tw_followed < TW_FOLLOW) {
            timeoutHandler = setTimeout(function() { start(false) }, TW_CLICK_DELAY);
        } else {
            console.log('Completed!');
        }
    }

    /*
     * Stop following manually
     */
    function stop() {
        tw_stop = true;
    }

    /*
     * Export
     */
    window.tw_start = function() { start(true); };
    window.tw_stop = function() { stop(); };
} ());

shows undefined in chrome console:(.