javascript 来自https://forums.developer.amazon.com/questions/75835/can-you-please-provide-a-video-skil

Posted 2021-05-04

'use strict';  exports.handler = function(event, context, callback) {  	if (isDiscovery(event)) {		callback(null, devices(event));	} else if (isChannelController(event)) {        callback(null, handleChannelControl(event));    } else {		callback(null, "some success message");	}}  function isDiscovery(event) {	return event['directive']['header']['namespace'] == 'Alexa.Discovery';}  function isChannelController(event) {    return event['directive']['header']['namespace'] == 'Alexa.ChannelController';}  function isChangingChannel(event) {    return event['directive']['header']['name'] == 'ChangeChannel';}  function devices(event) {      var messageId = event['directive']['header']['messageId'];    var header = {            "namespace": "Alexa.Discovery",            "name": "Discover.Response",            "payloadVersion": "3",            "messageId": messageId        }  	var payload = {		"endpoints": [{            "capabilities": [            {                "interface": "Alexa.RemoteVideoPlayer",                "type": "AlexaInterface",                "version": "1.0"            },            {            	"interface": "Alexa.ChannelController",            	"type": "AlexaInterface",            	"version": "1.0"            },            {            	"interface": "Alexa.PlaybackController",            	"version": "1.0",            	"type": "AlexaInterface"            }],            "endpointId": "videoDevice-001",            "description": "Device description that's shown to the customer",            "displayCategories": [],            "friendlyName": "Upstairs Amazon Player",            "manufacturerName": "Amazon"        }]    }      var response = {        'header': header,        'payload': payload    }    return {'event': response}}  function handleChannelControl(event) {    var payload = {};    var header = {};    var messageId = event['directive']['header']['messageId'];      if (isChangingChannel(event)) {        header = {            "namespace":"Alexa.ChannelController",            "name":"ChannelChanged",            "payloadVersion":"3",            "messageId": messageId        }    }      var response = {        'header': header,        'payload': payload    }      return { 'event': response }}