CodeHS-getSolutions-script.js

// ==UserScript==
// @name         CodeHS Solution Script
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Adds in a button that does the work for you
// @author       Pierce
// @match        https://codehs.com/editor/*
// @grant        none
// ==/UserScript==
(function() {
    'use strict';

    const url = window.location.href;
    const solutionId = url.split("/")[4];

    const panel = document.getElementById("sidebar-files-tab");

    const button = document.createElement("button");
    button.className = "btn btn-cs btn-main";
    button.style = "width:100%;font-size:14pxpadding-top: 3px;padding-bottom: 3px;margin-bottom: 5px;font-size: 12px;font-family: 'Proxima Nova',proxima-nova,sans-serif;";
    button.onclick = function() {
        const files = Array(document.getElementsByClassName("file"))[0];

        for (let file = 0; file < files.length; file++) {
            const xhr = new XMLHttpRequest();
            xhr.open('GET', `https://codehs.com/editor/${solutionId}/solution/${files[file].innerText}`);
            xhr.send();

            xhr.onreadystatechange = function() {
                if (this.readyState == 4 && this.status == 200) {

                    if (document.getElementById(files[file].innerText)) {
                        document.getElementById(files[file].innerText).remove();
                    }

                    let area = document.createElement("div");
                    area.innerHTML = `<div>${files[file].innerText}:</div>`;

                    let input = document.createElement("textarea");
                    input.id = files[file].innerText;
                    input.value = this.responseText;
                    area.appendChild(input);
                    panel.appendChild(area);
                }
            };
        }
    }

    const text = document.createTextNode("Get supported solutions");
    button.appendChild(text);
    panel.appendChild(button);
})();

this script is meant for people who already know what they are doing and want to quickly get through the module to work on other things.