getAnswer from otvet.mail.ru as a chat-bot

config.json

{
  "password": "your_password",
  "login": "your_login"
}

getAnswer.js

const request = require('request')
const striptags = require('striptags')

const getAnswer = function (text, callback) {
  const url = 'https://go.mail.ru/answer_json?q='
  request(url + encodeURIComponent(text), function (error, status, body) {
    if (error) return console.error('error', error)
    const json = JSON.parse(body)
    console.log('json', json)
    if (json.results[0] == null) return
    const answer = striptags(json.results[0].answer)
    if (callback) callback(answer)
  })
}

module.exports = getAnswer

index.js

var login = require('facebook-chat-api')
var getAnswer = require('./getAnswer.js')
var config = require('./config.json')

login({email: config.login, password: config.password}, function (err, bot) {
  if(err) return console.error(err)

  bot.listen((err, message) => {
    if (err || message.body == null) return

    const isQuestion = message.body.lastIndexOf('?') === message.body.length - 1
    if (isQuestion) {
      getAnswer(message.body, function (answer) {
        bot.sendMessage({body: answer}, message.threadID)
      })
    }
  })
})