// ==UserScript==
// @license      MIT
// @name         Get all downloadable content from MIT OpenCourseWare
// @match        https://ocw.mit.edu/courses/*
// @description  Get a button to download all the content from a course and lot to console
// @version 0.0.1.20221203155027
// @namespace https://greasyfork.org/users/941655
// ==/UserScript==
var res = [];
const mainButton = document.createElement("button");
mainButton.innerText = "Get all links";
mainButton.style.marginLeft = "auto";
console.log("Script loaded");
const parseLecture = async (linkElement) => {
const page = new DOMParser().parseFromString(
await (await fetch(linkElement.getAttribute("href"))).text(),
"text/html"
);
return {
title: `${linkElement.parentElement.getAttribute(
"data-title"
)}${linkElement.textContent.trim()}`,
link: page
.querySelector("a.download-file")
.getAttribute("href"),
};
}
const getLecture = async (lectureElement, name) => {
const linkElements = lectureElement.querySelectorAll("a");
const lectureTasks = [];
linkElements.forEach((linkElement) => {
lectureTasks.push(parseLecture(linkElement));
});
return { links: await Promise.all(lectureTasks), name };
}
const main = async () => {
console.log("Starting...");
const tasks = [];
let idx = 1;
for (const lectureElement of document.querySelectorAll(".card-body tbody tr")) {
const name = `${idx++}. ${lectureElement.querySelector("a").textContent.trim()}`;
tasks.push(getLecture(lectureElement, name));
}
res = await Promise.all(tasks);
console.log("Done!");
console.table(res);
}
mainButton.onclick = main;
document.addEventListener("readystatechange", () => {
console.log("Adding button...");
document.querySelector(".course-banner-content").appendChild(mainButton);
});