A fulfillment web hook for Dialogflow supporting local dev and Firebase Cloud Functions

app.js

const express = require('express')
const { WebhookClient } = require('dialogflow-fulfillment')
const app = express()

app.get('/', (req, res) => res.send('online'))
app.post('/dialogflow', express.json(), (req, res) => {
  const agent = new WebhookClient({ request: req, response: res })

  function welcome () {
    agent.add('Welcome to my agent!')
  }

  let intentMap = new Map()
  intentMap.set('Default Welcome Intent', welcome)
  agent.handleRequest(intentMap)
})

module.exports = app

cloudFuncs.js

const functions = require('firebase-functions')
const app = require('./app')

exports.app = functions.https.onRequest(app)

server.js

const app = require('./app')

app.listen(process.env.PORT || 8080)