index.js

'use strict';

const express = require('express'),
      Intelligo = require('intelligo');

const app = express();

const bot = new Intelligo({
  PAGE_ACCESS_TOKEN: 'PAGE_ACCESS_TOKEN',
  VALIDATION_TOKEN: 'VALIDATION_TOKEN',
  APP_SECRET: 'APP_SECRET',
  app: app
});

bot.initWebhook();

//Train the neural network with an array of training data.
bot.learn([
  { input: 'I feel great about the world!', output: 'happy' },
  { input: 'The world is a terrible place!', output: 'sad' },
]);

//Subscribe to messages sent by the user with the bot.on() method.
bot.on('message', (event) => {

  const senderID = event.sender.id,
        message = event.message;

  if (message.text) {
      const result = bot.answer(message.text);
      bot.sendTextMessage(senderID, result);
  }
});
app.set('port', process.env.PORT || 5000);
app.listen(app.get('port'), function() {
  console.log('Server is running on port', app.get('port'));
});