Steam Collection Download Size Calculator

scdsc.user.js

// ==UserScript==
// @name         Steam Collection Download Size Calculator
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Calculates the download size in mb
// @author       Exp
// @match        http://steamcommunity.com/sharedfiles/filedetails/?id=*
// @match        https://steamcommunity.com/sharedfiles/filedetails/?id=*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // First of all, is this an applicable Workshop page? The @match isn't enough
    // So, are we...
    // 1. A collection?

    var navigation = document.getElementsByClassName("breadcrumbs")[0];
    if (navigation.children[2].href.search("collections") == -1)
    {
        return;
    }

    var total = 0;
    var items = document.getElementsByClassName("collectionItemDetails");
    var parentLeft = document.getElementsByClassName("detailsStatsContainerLeft")[0];
    var parentRight = document.getElementsByClassName("detailsStatsContainerRight")[0];
    var shitRight = document.createElement("div");
    shitRight.className = "detailsStatRight";
    shitRight.innerText = "Total Download Size";
    parentRight.appendChild(shitRight);
    var myMB = document.createElement("div");
    myMB.className = "detailsStatLeft";
    myMB.innerText = "0 MB";
    parentLeft.appendChild(myMB);

    for (var i = 0; i < items.length; i++)
    {
        var item = items[i];
        var link = item.firstElementChild.href;
        fetch(link)
        .then(function(response) {
            return response.text();
        })
        .then(function(body) {
            var target = document.createElement("html"); //create a new html element (so we can insert the booty into it)
            target.innerHTML = body;
            var stat = target.getElementsByClassName("detailsStatRight")[0];
            if (stat == undefined)
            {
                return;
            }
            var mb = stat.innerText.slice(0, 6);
            total += Number(mb);
            myMB.innerText = total.toFixed(2) + " MB";
        });
    }
})();