Untitled

#!/usr/bin/node

// Install dependencies: npm install mozilla/readability jsdom axios argparse
// Usage: node mkebook.js --title Test url1 url2 > test.epub

const fs = require('fs').promises;
const { spawn } = require('child_process');

const { JSDOM } = require('jsdom');
const Readability = require('readability');
const axios = require('axios');
const { ArgumentParser } = require('argparse');

const parser = new ArgumentParser();
parser.addArgument(['-t', '--title'], { required: true });
parser.addArgument(['urls'], { nargs: '*' });

async function main(args) {
    const { title, urls } = args;
    const files = await Promise.all(urls.map(async (url, i) => {
        const filename = (i + 1).toString().padStart(3, '0') + '.html';
        const { data } = await axios.get(url);
        const { title, content } = new Readability((new JSDOM(data)).window.document).parse();
        const doc = new JSDOM('<html><head><title></title></head><body><h1></h1><div></div></body></html>');
        doc.window.document.querySelector('title').textContent = title;
        doc.window.document.querySelector('h1').textContent = title;
        doc.window.document.querySelector('div').innerHTML = content;
        await fs.writeFile(filename, doc.serialize());
        return filename;
    }));

    await new Promise((resolve, reject) => {
        spawn('pandoc', [`-Mtitle=${title}`, '-t', 'epub', '-o', '-', ...files], { stdio: 'inherit' })
            .on('error', reject)
            .on('exit', resolve);
    });

    await Promise.all(files.map(file => fs.unlink(file)));
}

main(parser.parseArgs()).catch(console.error);