handler-sample1.js

handler-sample1.js

let deviceId = this.event.context.System.device.deviceId;
this.context.log('deviceId = ', deviceId);  // will help you find out what the device ID is so you can add it into the global devices object

// get the mapping to the intent object
let intent = this.event.request.intent;
this.context.log('intent - ', intent);

// get the authority that is returning from alexa service.  filter it based on your alexa app ID and the Control_List name you gave it
let authority = intent.slots.Control.resolutions.resolutionsPerAuthority.filter(auth => auth.authority.includes(GetEnvironmentVariable('ALEXA_APP_ID') + ".Control_List"));

// get the actual word being sent back from alexa service so that we can match it later
let control = authority[0].values[0].value.id;
this.context.log('control - ', control);

// Setup default Alexa response.  This response will change based on the match made in the switch statement that determines
// which Control we are trying to use.
let alexaResponse = 'ok';

// did we detect a Control value?  If not, then Alexa will respond with a message that she doesn't understand what you're trying to do.
// If there is a value, then it will attempt to map it into an action
if (control) {
    // Obtain User Intent
    switch(control) {

        // based on the intent, this will map the action that simulates a button push on a remote control
        case "PLAY":
            path = '/remote/processKey?key=play&hold=keyPress';
            alexaResponse = "sure...playing now";
        break;
        case "PAUSE":
            path = '/remote/processKey?key=pause&hold=keyPress';
            alexaResponse = "sure...pausing now";
        break;
        case "ESPN":
            path = '/tv/tune?major=206';
            alexaResponse = "sure...changing to ESPN";
        break;
        case "ESPN2":
            path = '/tv/tune?major=209';
            alexaResponse = "sure...changing to ESPN2";
        break;

        // default check to see if a number was passed in and if so, it tries  to change the STB to that channel.  otherwise it gives up
        default:
            if (! isNaN(intent.slots.Channel.value) ) {
                path = '/tv/tune?major=' + intent.slots.Channel.value;
            } else {
                response.tell("I don't understand what you need.  Please try again");
            }
        break;
    };
} else {
    this.emit(':tell', "hmm... I don't know how to do that with Direct TV");
}

// get the room the directv unit is in.  If the user says the room at the end of their statement, then we will specifically take action on the STB mapped
// to that room in the global rooms object.  If the user does not add a room at the end of their statement, then we fall back to the trying to take action
// on the STB that is in the same room as the Alexa device the user is speaking to.  If all else fails, we set the clientAddress to null and 
// this will effectively cause Alexa to not be able to do anything.
if (rooms[intent.slots.Room.value]) {
    clientAddress = '&clientAddr=' + rooms[intent.slots.Room.value];
} else if (deviceRoom) {
    clientAddress = '&clientAddr=' + rooms[deviceRoom];
} else {
    clientAddress = null;
}

this.context.log('clientAddress = ', clientAddress);

if(clientAddress) {   
    let url = baseUrl + path + clientAddress;
    this.context.log('url - ', url);

    return fetch(url).then((res) => {
        if(res.ok) {
            this.emit(':tell', alexaResponse);
            return;
        } else {
            this.context.log('error response - ', res.status);
            switch(res.status){
                case 403:
                    this.emit(':tell', "that channel is currently unavailable");
                break;
                default:
                    this.emit(':tell', "hmm... that didn't work");
                break;
            };
            return;
        }
    }).catch(error => {
        throw error;
    });   
} else {
    this.emit(':tell', "hmm...I don't recognize that room");
    return;
}