dialogflowAPI_webhook_0.js

const region = 'asia-northeast1';
const functions = require('firebase-functions');
const request = require('request-promise');
const LINE_MESSAGING_API = "https://api.line.me/v2/bot/message";
const LINE_HEADER = {
    "Content-Type": "application/json",
    "Authorization": "Bearer CHANNEL_ACCESS_TOKEN"
};
//  1. Import Dialogflow library
//  2. define dialogflow projectId
//  3. Create session client

exports.webhookDetectIntent = functions.region(region).https.onRequest(async (req, res) => {
    if (req.body.events[0].type !== 'message') {
        return
    }
    if (req.body.events[0].message.type !== 'text') {
        return
    }
    
    const event = req.body.events[0]
    const userId = event.source.userId
    const message = event.message.text
    
    //  7. call detectIntent function
    //  8. convert structure to json
    //  9. reply to user
    
    res.status(200).end()
})

const detectIntent = async (userId, message, languageCode) => {
    //  4. create session path เพื่อจดจำ context ของ user
    //  5. create request params เพื่อใช้ส่งไป Dialogflow เพื่อ detectIntent
    //  6. call dialogflow API detectIntent
}