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how to get session id on webhook with action-on-google lib

See original GitHub issue

question is also asked on stackoverflow as well: https://stackoverflow.com/questions/46368359/how-to-get-session-id-on-webhook

I’m making assistant app for google home and mobile assistant

I’m using action-on-google library on webhook which is recommended and handy

in my specific case I want to make userEntity from webhook which requires Session Id but I am unable to get the sessionid on webhook

according to api.ai document it sends Json to webhook like this:

{
                    "lang": "en",
                    "status": {
                        "errorType": "success",
                        "code": 200
                    },
                    "timestamp": "2017-02-09T16:06:01.908Z",
                    "sessionId": "1486656220806" "result": {
                        "parameters": {
                            "city": "Rome",
                            "name": "Ana"
                        },
                        "contexts": [],
                        "resolvedQuery": "my name is Ana and I live in Rome",
                        "source": "agent",
                        "score": 1.0,
                        "speech": "",
                        "fulfillment": {
                            "messages": [
                                {
                                    "speech": "Hi Ana! Nice to meet you!",
                                    "type": 0
                                }
                            ],
                            "speech": "Hi Ana! Nice to meet you!"
                        },
                        "actionIncomplete": false,
                        "action": "greetings",
                        "metadata": {
                            "intentId": "9f41ef7c-82fa-42a7-9a30-49a93e2c14d0",
                            "webhookForSlotFillingUsed": "false",
                            "intentName": "greetings",
                            "webhookUsed": "true"
                        }
                    },
                    "id": "ab30d214-f4bb-4cdd-ae36-31caac7a6693",
                    "originalRequest": {
                        "source": "google",
                        "data": {
                            "inputs": [
                                {
                                    "raw_inputs": [
                                        {
                                            "query": "my name is Ana and I live in Rome",
                                            "input_type": 2
                                        }
                                    ],
                                    "intent": "assistant.intent.action.TEXT",
                                    "arguments": [
                                        {
                                            "text_value": "my name is Ana and I live in Rome",
                                            "raw_text": "my name is Ana and I live in Rome",
                                            "name": "text"
                                        }
                                    ]
                                }
                            ],
                            "user": {
                                "user_id": "PuQndWs1OMjUYwVJMYqwJv0/KT8satJHAUQGiGPDQ7A="
                            },
                            "conversation": {
                                "conversation_id": "1486656220806",
                                "type": 2,
                                "conversation_token": "[]"
                            }
                        }
                    }
                }

and ofcourse it is sending it correctly but on webhook we handover the request object to action-on-google and it returns an object with a bunch of methods like ask, askWithCarousel, askWithList and etc (documented here)

the problem is that there is not method to get conversation id documented then how do i get that session id:

my source code for reference:

/index.ts

import * as admin from 'firebase-admin';
import * as functions from 'firebase-functions';
import { Request, Response } from "express"; //interfaces
const ActionsSdkApp = require('actions-on-google').ApiAiAssistant;

import db from '../db';

// API.AI Action names
import {
inputWelcome
} from './actions'

const WELCOME_INTENT = 'input.welcome';

export const webhook = functions.https.onRequest(async (request: Request, response: Response) => {

console.log("request.body: ", request.body);
console.log("request.body.sessionId: ", request.body.sessionId);

const app = new ActionsSdkApp({ request: request, response: response });

let actionMap = new Map();
actionMap.set(WELCOME_INTENT, inputWelcome);
app.handleRequest(actionMap);
})//end of webhook http trigger

/actions/index.ts

import * as request from 'request';

export function inputWelcome(app: any) {

//I WANT SESSION ID HERE

console.log("app.conversation(): ", app.conversation());
console.log("app.AppRequest: ", app.AppRequest);
console.log("app.AppRequest.conversation: ", app.AppRequest.conversation);

console.log("app.AppRequest(): ", app.AppRequest());
console.log("app.AppRequest().conversation: ", app.AppRequest().conversation);


console.log("app.getUser().accessToken;: ", app.getUser().accessToken)
const accessToken = app.getUser().accessToken;

// MAKE USER ENTITY WITH THESE DATA:

    //     "sessionId": "current conversation id here",
    //     "name":"city",
    //      "extend":false,
    //     "entries": [
    //         {
    //             "name": "option1",
    //             "entries": [
    //                 {
    //                     "value": "option1",
    //                     "synonyms": [
    //                         "first",
    //                         "option one"
    //                     ]
    //                 }
    //             ]
    //         },
    //         {
    //             "name": "option2",
    //             "entries": [
    //                 {
    //                     "value": "option2",
    //                     "synonyms": [
    //                         "second one",
    //                         "second option"
    //                     ]
    //                 }
    //             ]
    //         },
    //         {
    //             "name": "option3",
    //             "entries": [
    //                 {
    //                     "value": "option3",
    //                     "synonyms": [
    //                         "third one",
    //                         "third option"
    //                     ]
    //                 }
    //             ]
    //         },
    //         {
    //             "name": "help",
    //             "entries": [
    //                 {
    //                     "value": "help",
    //                     "synonyms": [
    //                         "help",
    //                         "need help",
    //                         "ditn't get",
    //                         "need support"
    //                     ]
    //                 }
    //             ]
    //         }
    //     ]
    // }

// AND THEN ASK THE USER WITH SUGGESTION CHIPS

app.ask(app.buildRichResponse()
        .addSimpleResponse({
            speech: 'Hi you can start with these things',
            displayText: 'Hi you can start with these things'
        })
        .addSuggestions(['option1', 'option2', 'option3', 'Help'])
    )