Functions_for_SlotFilling.js

const REGION = 'asia-northeast1'
const runtimeOpts = {
    timeoutSeconds: 10,
    memory: "2GB"
}
const functions = require('firebase-functions')
const {WebhookClient, Payload} = require("dialogflow-fulfillment")
const message = require('./message')
let parameters

exports.dialogflowFulfillment = functions.region(REGION).runWith(runtimeOpts).https.onRequest(async (request, response) => {
    parameters = request.body.queryResult.parameters
    agent = new WebhookClient({request,response})
    let intentMap = new Map()
    intentMap.set('Order', orderSlotFilling)
    agent.handleRequest(intentMap)
})

const orderSlotFilling = async () => {
    let {size, color, qty} = parameters
    let filling_message = ''
    
    if (!size) {
        filling_message = message.size_filling()
    } else if(!color) {
        filling_message = message.color_filling()
    } else if(!qty) {
        filling_message = message.qty_filling()
    }
    if(filling_message !== '') {
        let payload = new Payload(`LINE`, filling_message, {sendAsMessage: true})
        return agent.add(payload)
    }
}