audio-skill.js

const Alexa = require('ask-sdk');
const mp3 = "https://exsample.com/audio001.mp3";

let skill;
exports.handler = async function (event, context) {
    if (!skill) {
      skill = Alexa.SkillBuilders.standard()
        .addRequestInterceptors(RequestInterceptor)
        .addRequestHandlers(
            PlayIntentHandler,
            PauseIntentHandler,
            ResumeIntentHandler,
            PlaybackNearlyFinishedHandler,
            PlaybackHandler,
            StopCancelIntentHandler)
        .create();
    }
    return skill.invoke(event);
}

// ログ取得のため
const RequestInterceptor = {
    process(h) { 
        console.log(JSON.stringify(h.requestEnvelope))
    }
};

// 再生
const PlayIntentHandler = {
    canHandle(h) {
        return isMatch(h, 'LaunchRequest','PlayIntent');
    },
    async handle(h) {
        const url = mp3;
        const token = mp3;
        return h.responseBuilder
            .addAudioPlayerPlayDirective('REPLACE_ALL', url, token, 0, null)
            .speak('オーディオ・サンプルを開始します')
            .getResponse();
    }
};
 
// 中断
const PauseIntentHandler = {
    canHandle(h) {
        return isMatch(h, 'AMAZON.PauseIntent');
    },
    async handle(h) {
        return h.responseBuilder 
        .addAudioPlayerStopDirective()
        .speak('オーディオ・サンプルを中断します')
        .getResponse();
    }
};
 
// 再開
const ResumeIntentHandler = {
    canHandle(h) {
        return isMatch(h, 'AMAZON.ResumeIntent');
    },
    async handle(h) {
        const url = mp3;
        const AudioPlayer = h.requestEnvelope.context.AudioPlayer;
        const token = AudioPlayer.token;
        const offset = AudioPlayer.offsetInMilliseconds;
        return h.responseBuilder
            .addAudioPlayerPlayDirective('REPLACE_ALL', url, token, offset, null)
            .speak('オーディオ・サンプルを再開します')
            .getResponse();
  }
};

// 連続再生
const PlaybackNearlyFinishedHandler = {
    canHandle(h) {
        return isMatch(h, 'AudioPlayer.PlaybackNearlyFinished');
    },
    async handle(h) {
        const url = mp3;
        const token = mp3;
        const AudioPlayer = h.requestEnvelope.context.AudioPlayer;
        const expectedPreviousToken = AudioPlayer.token;
        return h.responseBuilder
            .addAudioPlayerPlayDirective('ENQUEUE', url, token, 0, expectedPreviousToken)
            .getResponse();
    }
};

// 終了
const StopCancelIntentHandler = {
    canHandle(h) {
        return isMatch(h ,'AMAZON.CancelIntent', 'AMAZON.StopIntent');
    },
    handle(h) {
        return h.responseBuilder
        .addAudioPlayerStopDirective()
        .speak('オーディオ・サンプルを終了します')
        .getResponse();
    }
};
 
// 以下のイベントは処理しない
const PlaybackHandler = {
    canHandle(h) {
        return isMatch(h,'AudioPlayer.PlaybackStarted',
                          'AudioPlayer.PlaybackFinished',
                          'AudioPlayer.PlaybackStopped',
                           'AudioPlayer.PlaybackFailed');
    },
    async handle(h) {
        return h.responseBuilder.getResponse();
    }
};
 
// インテント名・タイプのマッチング用のヘルパー
isMatch = function(h, ...intents) {
    return intents.some( intent => {
        if (intent == 'SessionEndedRequest' || intent == 'LaunchRequest') {
            return h.requestEnvelope.request.type == intent;
        }
        if (h.requestEnvelope.request.type == 'IntentRequest') {
            return h.requestEnvelope.request.intent.name === intent
        }
        if (h.requestEnvelope.request.type.indexOf('AudioPlayer.') === 0) {
          return h.requestEnvelope.request.type === intent
        }
        return false;
    })
}