botium-core/samples/connectors/docker/facebook/index.js

The Selenium for Chatbots

// This is still work in progress
/*
Please report any bugs to nicomwaks@gmail.com

i have added console.log on line 48

 */
'use strict'

const express = require('express')
const bodyParser = require('body-parser')
const request = require('request')
const app = express()

app.set('port', (process.env.PORT || 5000))

// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({extended: false}))

// parse application/json
app.use(bodyParser.json())

// index
app.get('/', function (req, res) {
  res.send('hello world i am a secret bot')
})

// for facebook verification
app.get('/webhook/', function (req, res) {
  if (req.query['hub.verify_token'] === 'my_voice_is_my_password_verify_me') {
    res.send(req.query['hub.challenge'])
  } else {
    res.send('Error, wrong token')
  }
})

app.get('/health/', function (req, res) {
  res.status(201).send('Chatbot is ready')
})

// to post data
app.post('/webhook/', function (req, res) {
  if (!req.body || !req.body.entry || !req.body.entry.length > 0) { return res.sendStatus(200) }

  let messagingEvents = req.body.entry[0].messaging
  for (let i = 0; i < messagingEvents.length; i++) {
    let event = req.body.entry[0].messaging[i]
    let sender = event.sender.id
    if (event.message && event.message.text) {
      let text = event.message.text
      if (text === 'Generic') {
        console.log('welcome to chatbot')
        sendGenericMessage(sender)
        continue
      }
      sendTextMessage(sender, 'Text received, echo: ' + text.substring(0, 200))
    }
    if (event.postback) {
      let text = JSON.stringify(event.postback)
      sendTextMessage(sender, 'Postback received: ' + text.substring(0, 200), token)
      continue
    }
  }
  res.sendStatus(200)
})

// recommended to inject access tokens as environmental variables, e.g.
// const token = process.env.FB_PAGE_ACCESS_TOKEN
const token = '<FB_PAGE_ACCESS_TOKEN>'

function sendTextMessage (sender, text) {
  let messageData = { text: text }

  request({
    url: 'https://graph.facebook.com/v2.6/me/messages',
    qs: {access_token: token},
    method: 'POST',
    json: {
      recipient: {id: sender},
      message: messageData
    }
  }, function (error, response, body) {
    if (error) {
      console.log('Error sending messages: ', error)
    } else if (response.body.error) {
      console.log('Error: ', response.body.error)
    } else {
      console.log('Bot Sent Message: ', messageData)
    }
  })
}

function sendGenericMessage (sender) {
  let messageData = {
    'attachment': {
      'type': 'template',
      'payload': {
        'template_type': 'generic',
        'elements': [{
          'title': 'First card',
          'subtitle': 'Element #1 of an hscroll',
          'image_url': 'http://messengerdemo.parseapp.com/img/rift.png',
          'buttons': [{
            'type': 'web_url',
            'url': 'https://www.messenger.com',
            'title': 'web url'
          }, {
            'type': 'postback',
            'title': 'Postback',
            'payload': 'Payload for first element in a generic bubble'
          }]
        }, {
          'title': 'Second card',
          'subtitle': 'Element #2 of an hscroll',
          'image_url': 'http://messengerdemo.parseapp.com/img/gearvr.png',
          'buttons': [{
            'type': 'postback',
            'title': 'Postback',
            'payload': 'Payload for second element in a generic bubble'
          }]
        }]
      }
    }
  }
  request({
    url: 'https://graph.facebook.com/v2.6/me/messages',
    qs: {access_token: token},
    method: 'POST',
    json: {
      recipient: {id: sender},
      message: messageData
    }
  }, function (error, response, body) {
    if (error) {
      console.log('Error sending messages: ', error)
    } else if (response.body.error) {
      console.log('Error: ', response.body.error)
    } else {
      console.log('Bot Sent Message: ', messageData)
    }
  })
}

// spin spin sugar
app.listen(app.get('port'), function () {
  console.log('running on port', app.get('port'))
})