Basic Lambda Function (VSK FTV)
In Step 1: Create Your Video Skill and Lambda Function, you integrated some basic code as a sample Lambda function to get started. For convenience and easy reference, this function is also added below.
/**
* Copyright 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Amazon Software License (the "License"). You may not use this file except in # compliance with the License.
* A copy of the License is located at http://aws.amazon.com/asl/
*
* or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS
* OF ANY KIND, express or implied. See the License for the specific # language governing permissions and limitations under the License.
**/
// This file includes sample lambda code for a Video Skills API integration on Fire TV,
// including responses for Discovery, SearchAndPlay, FastForward, Channel Change, and other
// directive types. Partners should use this code as a starting point, but then add their
// own logic. Partners should test and validate any code before using it in production.
// Amazon's recommended approach is to take directives received by the lambda and send
// them directly to the app via ADM. Any further processing can occur within the app.
// NOTE: Responses back to Alexa should NOT be modified, only code to process/send directives.
// NOTE: You should send directives from the lambda to your app, but you should NOT try
// to send messages from your app back to the lambda. Success responses from the lambda
// are only meant to indicate that the message was received by the lambda, not the app.
var AWS = require('aws-sdk');
exports.handler = (event, context, callback) => {
console.log("Lambda was invoked by Alexa");
console.log("Event: " + JSON.stringify(event, null, 2));
console.log("Context: " + context);
let directive = event.directive;
if (directive)
{
console.log("Directive received from Alexa: " + directive);
if (directive.header.name == "Discover")
{
console.log(directive.header.name, " directive received from Alexa");
let resp = {
event: {
header : {
messageId : directive.header.messageId,
name : "Discover.Response",
namespace: "Alexa.Discovery",
payloadVersion: "3"
},
"payload": {
"endpoints": [
{
"capabilities": [
{
"interface": "Alexa.RemoteVideoPlayer",
"type": "AlexaInterface",
"version": "1.0"
},
{
"interface": "Alexa.PlaybackController",
"type": "AlexaInterface",
"version": "1.0"
},
{
"interface": "Alexa.SeekController",
"type": "AlexaInterface",
"version": "1.0"
},
{
"interface": "Alexa.ChannelController",
"type": "AlexaInterface",
"version": "1.0"
}
],
"endpointId": "VSKTV",
"description": "VSKTV is the default device used for video skills developed for Fire TV integrations",
"friendlyName": "VSKTV",
"manufacturerName": "Amazon"
}
]
}
}
};
console.log("Sending ", directive.header.name, " response back to Alexa: ", JSON.stringify(resp));
callback(null, resp);
}
else if ( directive.header.name == "SearchAndPlay"
|| directive.header.name == "SearchAndDisplayResults"
|| directive.header.name == "Play"
|| directive.header.name == "Resume"
|| directive.header.name == "Pause"
|| directive.header.name == "Next"
|| directive.header.name == "Previous"
|| directive.header.name == "Rewind"
|| directive.header.name == "FastForward")
{
console.log(directive.header.name, " directive received from Alexa");
// Partner-specific logic to handle the the directives goes here
// Code for sending directive from the lambda to the app goes here
// Below, we send a "success" response back to Alexa, indicating the directive was received by the lambda
let resp = {
event: {
"header" : {
"messageId": "not-required",
"correlationToken": "not-required",
"name": "Response",
"namespace": "Alexa",
"payloadVersion": "3"
},
"endpoint": {
"scope": {
"type": "DirectedUserId",
"directedUserId": "not-required"
},
"endpointId": "not-required"
},
"payload": { }
}
};
console.log("Sending ", directive.header.name, " response back to Alexa: ", JSON.stringify(resp));
callback(null, resp);
}
else if (directive.header.name == "AdjustSeekPosition")
{
console.log(directive.header.name, " directive received from Alexa");
// Partner-specific logic to handle the AdjustSeekPosition directive goes here
// Code for sending this directive from the lambda to the app goes here
// Below, we send a "success" response back to Alexa, indicating the directive was received by the lambda
let resp = {
event: {
"header" : {
"messageId": "not-required",
"correlationToken": "not-required",
"name": "StateReport",
"namespace": "Alexa.SeekController",
"payloadVersion": "3"
},
"endpoint": {
"scope": {
"type": "DirectedUserId",
"directedUserId": "not-required"
},
"endpointId": "not-required"
},
"payload": {
"properties": [{
"name": "positionMilliseconds",
"value": 0
}]
}
}
};
console.log("Sending ", directive.header.name, " response back to Alexa: ", JSON.stringify(resp));
callback(null, resp);
}
else if (directive.header.name == "ChangeChannel")
{
console.log(directive.header.name, " directive received from Alexa");
// Partner-specific logic to handle the ChangeChannel directive goes here
// Code for sending this directive from the lambda to the app goes here
// Below, we send a "success" response back to Alexa, indicating the directive was received by the lambda
let resp = {
context: {
"properties": [
{
"namespace": "Alexa.ChannelController",
"name": "channel",
"value": {
"number": "1234",
"callSign": "not-required",
"affiliateCallSign": "not-required"
},
"timeOfSample": "2017-02-03T16:20:50.52Z",
"uncertaintyInMilliseconds": 0
}
]
},
event: {
"header" : {
"messageId": "not-required",
"correlationToken": "not-required",
"name": "Response",
"namespace": "Alexa",
"payloadVersion": "3"
},
"endpoint": {
"endpointId": "not-required"
},
"payload": { }
}
};
console.log("Sending ", directive.header.name, " response back to Alexa: ", JSON.stringify(resp));
callback(null, resp);
}
else if (directive.header.name == "AcceptGrant")
{
console.log(directive.header.name, " directive received from Alexa");
let resp = {
"event": {
"header": {
"messageId": "abc-123-def-456",
"namespace": "Alexa.Authorization",
"name": "AcceptGrant.Response",
"payloadVersion": "3"
},
"payload": {}
}
};
console.log("Sending ", directive.header.name, " response back to Alexa: ", JSON.stringify(resp));
callback(null, resp);
}
else
{
console.log("Directive is not supported. Ignoring it.");
callback(null, 'Directive is not supported. Ignoring it.');
}
}
else
{
console.log( 'Directive is null. Ignoring it.');
callback(null, 'Directive is null. Ignoring it.');
}
};