const fs = require('fs');
const EventEmitter = require('events').EventEmitter;
const fetch = require('node-fetch');
const cheerio = require('cheerio');

const e = new EventEmitter();

e.on('fetchPage', link => {
  fetch(link).then(r => r.text()).then(cheerio.load).then($ => {
    const nextLink = $(".next_post a").attr('href');
    if (nextLink === undefined) return; // end on final page
    const postTitle = $(".headline").text();
    const postContent = $(".post_content").html();
    console.log(postTitle);
    fs.writeFileSync(postTitle + ".html", postContent);
    setTimeout(() => e.emit('fetchPage', nextLink), 5000);
  });
});

e.emit('fetchPage', 'https://whatever/post1');