Dialogflow ES fulfillment did not reply - google-cloud-functions

Question

[Update] with the entire code
// See https://github.com/dialogflow/dialogflow-fulfillment-nodejs
// for Dialogflow fulfillment library docs, samples, and to report issues
'use strict';
const functions = require('firebase-functions');
const {WebhookClient} = require('dialogflow-fulfillment');
const {Card, Suggestion} = require('dialogflow-fulfillment');
const admin = require('firebase-admin');
process.env.DEBUG = 'dialogflow:debug'; // enables lib debugging statements
admin.initializeApp(functions.config().firebase);
const db = admin.firestore();
const settings = {/* your settings... */ timestampsInSnapshots: true};
db.settings(settings);
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 writeToDb (agent) {
const startDate = agent.parameters.startdate;
// Always assume user enter time in the past (for existing time)
console.log("start date:" + startDate);
if (Date.parse(startDate) > Date.now()) {
startDate.setFullYear(startDate.getFullYear() - 1);
// console.log("modify start date to: " + startDate);
}
const dfRef = db.collection('period').doc(request.body.originalDetectIntentRequest.payload.data.sender.id);
agent.add('Got it. That me write it done for ya');
dfRef.get().then(user => {
if(!user.exists) {
dfRef.create({dates: admin.firestore.FieldValue.arrayUnion(startDate)})
.then(() => {
}).catch(err => {
console.log('error create firestore date entry:' + `${err}`);
});
} else {
dfRef.update({dates: admin.firestore.FieldValue.arrayUnion(startDate)})
.then(() => {
}).catch(err => {
console.log('error update firestore date entry:' + `${err}`);
});
}
}).catch(err => {
console.log('error access firestore date:' + `${err}`);
});
}
function readFromDb (agent) {
// Get the database collection 'dialogflow' and document 'agent'
const startDate = agent.parameters.startdate;
const future = agent.parameters.future;
const dialogflowAgentDoc = db.collection('period').doc(request.body.originalDetectIntentRequest.payload.data.sender.id);
// Get the value of 'entry' in the document and send it to the user
return dialogflowAgentDoc.get()
.then(doc => {
if (doc.exists) {
var darray = doc.data().dates;
if (darray.length > 0) {
if (future) {
agent.add('let me calculate for you..');
var next = new Date(darray[darray.length-2]);
const dayDiff = calculateSchedule(darray);
next.setDate(next.getDate() + dayDiff * 1);
agent.add(next.toLocaleDateString('en-us', {month:"short", day: 'numeric', weekday: 'short'}));
} else {
agent.add('let me look up for you..');
agent.add(new Date(darray[darray.length-1]).toLocaleDateString('en-us', {month:"short", day: 'numeric', weekday: 'short'}));
}
} else {
agent.add('I cant find anything :( ');
}
} else {
agent.add('something was wrong, I cant find your record :/');
}
return Promise.resolve('complete!');
}).catch(err => {
agent.add(`Error reading entry from the Firestore database. ${err}`);
});
}
function calculateSchedule(arr) {
// emitted..
}
// Run the proper function handler based on the matched Dialogflow intent name
let intentMap = new Map();
intentMap.set('it start today', writeToDb);
intentMap.set('when did it start', readFromDb);
agent.handleRequest(intentMap);
});
[Original]
Hi my dialogflow ES is connected to fb messenger and the purpose is to reply a message after I recorded what the customer say into DB, I checked if the document exist: here is my code
function writeToDb (agent) {
const startDate = agent.parameters.startdate;
const dfRef = db.collection('start').doc('my_id');
dfRef.get().then(user => {
if(!user.exists) {
dfRef.create({dates: admin.firestore.FieldValue.arrayUnion(startDate)})
.then(() => {
agent.add('Got it. let me write it down for ya');
}).catch(err => {
console.log(`${err}`);
});
} else {
dfRef.update({dates: admin.firestore.FieldValue.arrayUnion(startDate)})
.then(() => {
agent.add('Got it. let me write it down for ya');
}).catch(err => {
console.log(`${err}`);
});
}
});
}
the startDate value is successfully store in the firestore. However, I never get the reply message, is there anything I did wrong? I felt it should be simple enough.
Thanks for your help.

Answer 1

You are missing to set up the IntentMap() see step 5 and 6.
In the intentMap, you will need to add a map from the Intent name to a function that will do the handling when that Intent triggers the webhook. You can have a different handler function for each Intent, use the same function for some, have those functions call other functions, whatever you need. Finally use agent.handleRequest(intentMap);.