List and save all messages from the Facebook ticker

server.js

const Nightmare = require('nightmare')
const Datastore = require('nedb')

const DB = new Datastore({ filename: 'ticks.db', autoload: true })
const INTERVAL = process.env.INTERVAL || 15000

var nightmare = new Nightmare({
  show: true,
  webPreferences: {
    partition: 'nopersist'
  }
})

nightmare
  .on('console', (type, log) => {
    if (log.type && log.type === 'tickerFeedMessage') {
      DB.find(log, (err, ticks) => {
        if (err) console.error(err)

        if (ticks.length === 0) {
          console.log(`${log.user}${log.text}`)
          DB.insert(log)
        }
      })
    }
  })
  .goto('https://facebook.com')
  .viewport(1600, 800)
  .type('input#email', process.env.EMAIL)
  .type('input#pass', process.env.PASSWORD)
  .click('#loginbutton input')
  .then(getMessages)
  .catch(console.error)

function getMessages () {
  setTimeout(() => {
    return nightmare
      .goto('https://facebook.com')
      .wait('.tickerFeedMessage')
      .evaluate(function () {
        let feedTickerStories = document.getElementsByClassName('fbFeedTickerStory')

        Array.from(feedTickerStories).reverse().forEach(a => {
          let feedMessage = a.getElementsByClassName('tickerFeedMessage')[0]
          let storyLink = a.getElementsByClassName('tickerStoryLink')[0]
          let link = storyLink && storyLink.href
          let user = feedMessage.lastChild.previousSibling.innerText
          let text = feedMessage.lastChild.textContent
          console.log({ type: 'tickerFeedMessage', user, text, link })
        })
      })
      .then(getMessages)
  }, INTERVAL)
}