educativeGrub.user.js

// ==UserScript==
// @name eductiveGrub
// @description Grub educative course
// @author Jem Jem
// @license MIT
// @version 1.0
// @include https://www.educative.io/courses/*
// @include https://www.educative.io/module/*
// ==/UserScript==
(async function (window, undefined) {  // [2] нормализуем window

	function getContentLinks() {
		const links = document.querySelectorAll(".h-full a.cursor-pointer[href^='/courses']:not(.heading-five):not(.break-words), .h-full a.cursor-pointer[href^='/module']:not(.heading-five):not(.break-words)");
		let result = [];
		for(let i = 0; i < links.length; i++) {
			let link = links[i].getAttribute('href');
			result.push(`https://www.educative.io${link}`);
		}
		return result;
	}

	function sleep(seconds) {
		return new Promise((res, rej) => {
			setTimeout(res, seconds * 1000);
		})
	}

	function saveFile(data) {
		const fileName = document.title;
		let blob = new Blob([data],{ type: "text/html;charset=utf-8" });
		let a = document.createElement("a");
		let url = window.URL.createObjectURL(blob);
		a.style = "display: none";
		a.href = url;
		a.download = fileName;
		document.body.appendChild(a);
		a.click();
	}

    function saveDelimetrFile(data) {
		const fileName = 'Next Module.txt';
		let blob = new Blob([data],{ type: "text/plain;charset=utf-8" });
		let a = document.createElement("a");
		let url = window.URL.createObjectURL(blob);
		a.style = "display: none";
		a.href = url;
		a.download = fileName;
		document.body.appendChild(a);
		a.click();
	}

    function saveMediaFile(link, name) {
		let a = document.createElement("a");
		a.style = "display: none";
		a.href = link;
		a.download = name;
		document.body.appendChild(a);
		a.click();
	}

    function saveMedia(document) {
        let objects = document.querySelectorAll('object');
        let links = {};
        for(let i = 0; i < objects.length; i++) {
			let link = objects[i].getAttribute('data');
			let fullLink = link.includes('https://www.educative.io') ? link : `https://www.educative.io${link}`;
            let linkText = link.replace(/[\/\?]/g, '_');
            links[link] = linkText + '.svg';
            saveMediaFile(fullLink, link)
		}
        let imgs = document.querySelectorAll('.major-second img');
        links = {};
        for(let i = 0; i < imgs.length; i++) {
			let link = imgs[i].getAttribute('src');
			let fullLink = link.includes('https://www.educative.io') ? link : `https://www.educative.io${link}`;
            let linkText = link.replace(/[\/\?]/g, '_');
            links[link] = linkText + '.svg';
            saveMediaFile(fullLink, link)
		}
        return links;
    }

	async function grub() {
        await sleep(10);
		let links = localStorage.getItem('links');
		let hasFinished = localStorage.getItem('saved');
		if(hasFinished === 'true') {
			return;
		}
		if(!links) {
			links = getContentLinks();
		} else {
			links = JSON.parse(links);
		}
		const nextLink = links[0];
        await sleep(10);
		let html = document.querySelector('html').innerHTML.replace(/(\\x3C\/)/g, '<');
		localStorage.setItem('links', JSON.stringify(links.slice(1)));
        let mediaLinks = saveMedia(document);
        Object.keys(mediaLinks).forEach((key) => html = html.replace(key, mediaLinks[key]));
        saveFile(html);
		if(!nextLink) {
            localStorage.setItem('links', '');
            let nextModule = checkModuleToGrub();
            if(!nextModule) {
                localStorage.setItem('saved', true);
                localStorage.setItem('modules-saved', true);
                return;
            } else {
                saveDelimetrFile('123')
                window.location = nextModule;
                return;
            }

		}
		window.location = nextLink;
	}

    function checkModuleToGrub() {
        let modules = localStorage.getItem('modules-links');
        if(!modules) {
            return;
        }
        if(modules){
            modules = JSON.parse(modules);
        }
        let nextModule = modules[0];
        modules = modules.slice(1);
        localStorage.setItem('modules-links', !modules.length ? '' : JSON.stringify(modules));
        return nextModule;
    }

    await grub();
})(window);