alexa-iot-lambda.js

/* eslint-disable  func-names */
/* eslint quote-props: ["error", "consistent"]*/
/**
 * This sample demonstrates a simple skill built with the Amazon Alexa Skills
 * nodejs skill development kit.
 * This sample supports multiple lauguages. (en-US, en-GB, de-DE).
 * The Intent Schema, Custom Slots and Sample Utterances for this skill, as well
 * as testing instructions are located at https://github.com/alexa/skill-sample-nodejs-fact
 **/

'use strict';

const Alexa = require('alexa-sdk');
const AWS = require('aws-sdk');

AWS.config.region = 'us-east-1'

const APP_ID = undefined;
const IOT_ENDPOINT=process.env.IOT_ENDPOINT
const MQTT_TOPIC=process.env.MQTT_TOPIC
const ACCESS_KEY_ID=process.env.ACCESS_KEY_ID
const SECRET_ACCESS_KEY=process.env.SECRET_ACCESS_KEY

const iotdata = new AWS.IotData({
    endpoint: IOT_ENDPOINT,
    accessKeyId: ACCESS_KEY_ID,
    secretAccessKey: SECRET_ACCESS_KEY,
    region:'us-east-1',
    httpOptions:{
        xhrAsync: false,
    }
});


const languageStrings = {
    'en': {
        translation: {
            SKILL_NAME: 'LED Controller',
            GET_FACT_MESSAGE: "And there was light ",
            HELP_MESSAGE: 'You can say turn on the light, or, you can say exit... What can I help you with?',
            HELP_REPROMPT: 'What can I help you with?',
            STOP_MESSAGE: 'Goodbye!',
        },
    },
};

function publishMessage(){

}

const handlers = {
    'LaunchRequest': function () {
        this.emit('ControlLight');
    },
    'ControlLightIntent': function () {
        this.emit('ControlLight');
    },
    'ControlLight': function () {
        // Get a random space fact from the space facts list
        // Use this.t() to get corresponding language data

        // Create speech output
        //const speechOutput = this.t('GET_FACT_MESSAGE');
        //this.emit(':tellWithCard', speechOutput, this.t('SKILL_NAME'), speechOutput);

        var params = {
            topic: MQTT_TOPIC,
            payload: '{"state" : "on"}',
            qos: 1
        };

        console.log('iotdata.publish::params: ' + JSON.stringify(params))

        iotdata.publish(params, (err, data) => {
            if(err){
                this.emit(':tellWithCard', `an error occurred when publishing iot message: ${err}`, this.t('SKILL_NAME'),
                "I'm sorry, I couldn't turn on your light");
            }
            else{
                this.emit(':tellWithCard', 'And there was light', this.t('SKILL_NAME'), 'And there was light');
                //context.succeed(event);
            }
        });
    },
    'AMAZON.HelpIntent': function () {
        const speechOutput = this.t('HELP_MESSAGE');
        const reprompt = this.t('HELP_MESSAGE');
        this.emit(':ask', speechOutput, reprompt);
    },
    'AMAZON.CancelIntent': function () {
        this.emit(':tell', this.t('STOP_MESSAGE'));
    },
    'AMAZON.StopIntent': function () {
        this.emit(':tell', this.t('STOP_MESSAGE'));
    },
};


exports.handler = function (event, context) {
    const alexa = Alexa.handler(event, context);
    alexa.appId = APP_ID;
    // To enable string internationalization (i18n) features, set a resources object.
    alexa.resources = languageStrings;
    alexa.registerHandlers(handlers);
    alexa.execute();
};