handler.js

// See https://github.com/dialogflow/dialogflow-fulfillment-nodejs
// for Dialogflow fulfillment library docs, samples, and to report issues
'use strict';

const request = require('request');

const REASON_URL = `https://s3.ap-south-1.amazonaws.com/idontlikework/wfh-reasons.json`;

exports.dialogflowFirebaseFulfillment = functions.https.onRequest((request, response) => {
  const agent = new WebhookClient({ request, response });
  console.log('Dialogflow Request headers: ' + JSON.stringify(request.headers));
  console.log('Dialogflow Request body: ' + JSON.stringify(request.body));

  function fetchReasons(cb) {
    request(url, function(err, res, body) {
      cb(JSON.parse(body));
    });
  }

  function fallback(agent) {
    agent.add(`I didn't understand`);
    agent.add(`I'm sorry, can you try again?`);
  }

  // // Uncomment and edit to make your own intent handler
  // // uncomment `intentMap.set('your intent name here', yourFunctionHandler);`
  // // below to get this function to be run when a Dialogflow intent is matched
  function askSuggestionHandler(agent) {
    agent.add(`This message is from Dialogflow's Cloud Functions for Firebase editor!`);
    agent.add(
      new Card({
        title: `Title: this is a card title`,
        imageUrl: 'https://developers.google.com/actions/images/badges/XPM_BADGING_GoogleAssistant_VER.png',
        text: `This is the body text of a card.  You can even use line\n  breaks and emoji! 💁`,
        buttonText: 'This is a button',
        buttonUrl: 'https://assistant.google.com/',
      }),
    );
    agent.add(new Suggestion(`Quick Reply`));
    agent.add(new Suggestion(`Suggestion`));
    agent.setContext({ name: 'weather', lifespan: 2, parameters: { city: 'Rome' } });
  }

  // // Uncomment and edit to make your own Google Assistant intent handler
  // // uncomment `intentMap.set('your intent name here', googleAssistantHandler);`
  // // below to get this function to be run when a Dialogflow intent is matched
  // function googleAssistantHandler(agent) {
  //   let conv = agent.conv(); // Get Actions on Google library conv instance
  //   conv.ask('Hello from the Actions on Google client library!') // Use Actions on Google library
  //   agent.add(conv); // Add Actions on Google library responses to your agent's response
  // }
  // // See https://github.com/dialogflow/dialogflow-fulfillment-nodejs/tree/master/samples/actions-on-google
  // // for a complete Dialogflow fulfillment library Actions on Google client library v2 integration sample

  // Run the proper function handler based on the matched Dialogflow intent name
  let intentMap = new Map();
  intentMap.set('Ask Suggestion', welcome);
  intentMap.set('Default Fallback Intent', fallback);
  // intentMap.set('your intent name here', yourFunctionHandler);
  // intentMap.set('your intent name here', googleAssistantHandler);
  agent.handleRequest(intentMap);
});