// ==UserScript==
// @name        Disqus: Load All
// @namespace   my-disqus-load-all-script
// @description Trigger all the Disqus "read more comments" links, because that's AWFUL.
// @include     https://disqus.com/embed/comments/*
// @version     1
// @grant       none
// ==/UserScript==

(function(document, window) {

    var waitForLoad = function() {
        if (typeof(window.DISQUS) == "undefined" || typeof(window.jQuery) == "undefined") {
            // Still waiting for Disqus and jQuery libraries to load.
            window.setTimeout(waitForLoad, 500);
        }
        else {
            // The 'show more' links to look for.
            var clickable = 'a.show-children:visible, a.load-more__button:visible';
            // Process all the visible 'show more' links.
            var processUnclickedLinks = function() {
                jQuery('section#conversation').find(clickable).each(function(idx, el) {
                    var link = jQuery(el);
                    // And, unless they have already been clicked,
                    // or have been hidden, click them.
                    if (!link.hasClass('busy')) {
                        // console.log(el);
                        link.click();
                    }
                });
            }
            // Whenever *any* AJAX loading finishes...
            jQuery(document).ajaxComplete(function(event, jqXHR, ajaxOptions) {
                // Check to see if the element in question was a
                // Disqus 'load more' link.
                var activeElement = jQuery(event.target.activeElement);
                if (activeElement.hasClass('show-children') || activeElement.hasClass('load-more__button')) {
                    window.setTimeout(processUnclickedLinks, 500);
                    // If the hidden thread is sufficiently lengthy,
                    // one click of a given link may be insufficient
                    // to load all of its descendants.  In addition
                    // the request might fail for some reason.  In
                    // either case we can't assume that the link we
                    // clicked has been successfully finished with.
                    //
                    // As we always filter on the currently-visible
                    // links, it's a pretty low-cost workaround to
                    // just Try Again a few seconds later in order
                    // to deal with any such stragglers.
                    window.setTimeout(processUnclickedLinks, 5000);
                }
            });
        }
    };
    // Begin by waiting for the Disqus and jQuery libraries to load.
    window.setTimeout(waitForLoad, 500);

})(document, window);