javascript - Discord ボットを介して再生するオーディオをキューに入れる

Question

私は現在、Discord のボットを書いて遊んでいます。

特定の検索語に基づいて YouTube にクエリを実行し、上位の結果からオーディオを再生することができましたが、リスト内のオーディオ トラックをキューに入れ、オーディオ ストリームが完了したらそれらを再生しようとすると、問題が発生しました。 .

const API_KEY = "<my API Key>";

var discord = require("discord.js");
var ytdl = require('ytdl-core');
var request = require('superagent');

var bot = new discord.Client();
var voiceChannel = null;
var ytAudioQueue = [];

bot.on('ready', function() {
    console.log('I am ready');
});

bot.on('message', function(message) {
    var messageParts = message.content.split(' ');

    var command = messageParts[0].toLowerCase();
    var parameters = messageParts.splice(1, messageParts.length);

    console.log("command: " + command);
    console.log("parameters: " + parameters);

    switch (command) {
        case "hi":
            message.reply("Hey there!");
            break;
        case "*help":
            HelpCommand(message);
            break;
        case "*join":
            message.reply("Attempting to join channel: " + parameters[0]);
            JoinCommand(parameters[0], message);
            break;
        case "*play":
            PlayCommand(parameters.join(" "), message);
            break;
    }
});

voiceChannel.on('speaking', (user, speaking) => {

    // the audio has finished playing, so remove it from the queue and start playing the next song
    if (!speaking && ytAudioQueue.length > 1) {
        ytAudioQueue.pop();

        if (voiceChannel == null) {
            JoinCommand(bot.channels.find(val => val.type === 'voice').name).then(function() {
                PlayStream(ytAudioQueue.first);
            });
        }
        else {
            PlayStream(ytAudioQueue.first);
        }
    }
});

/* COMMAND HANDLERS */

/// lists out all of the bot commands
function HelpCommand(originalMessage) {
    originalMessage.reply("*join <channel-to-join> - Connects to bot to a channel by channel name");
    originalMessage.reply("*play <YouTube search term> - Plays audio from YouTube based on the search term");
}

/// plays audio based on results from youtube search
function PlayCommand(searchTerm) {
    //bot.sendMessage("Searching Youtube for audio...");
    YoutubeSearch(searchTerm);
}

/// joins the bot to the specified voice channel
function JoinCommand(channelName) {

    if (voiceChannel) {
        voiceChannel.disconnet();
    }

    var voiceChannel = GetChannelByName(channelName);
    return voiceChannel.join();
}

/* END COMMAND HANDLERS */

/* HELPER METHODS */

/// returns the channel that matches the name provided
function GetChannelByName(name) {
    var channel = bot.channels.find(val => val.name === name);

    return channel;
}

function YoutubeSearch(searchKeywords) {
    var requestUrl = 'https://www.googleapis.com/youtube/v3/search' + `?part=snippet&q=${escape(searchKeywords)}&key=${API_KEY}`;

    request(requestUrl, (error, response) => {
        if (!error && response.statusCode == 200) {

            var body = response.body;
            if (body.items.length == 0) {
                console.log("Your search gave 0 results");
                return videoId;
            }

            for (var item of body.items) {
                if (item.id.kind === 'youtube#video') {
                    QueueYtAudioStream(item.id.videoId);
                }
            }
        }
        else {
            console.log("Unexpected error when searching YouTube");
            return null;
        }
    });

    return null;
}

/// Queues result of Youtube search into stream
function QueueYtAudioStream(videoId) {
    var streamUrl = `https://www.youtube.com/watch?v=${videoId}`;
    ytAudioQueue.push(streamUrl);
}

// plays a given stream
function PlayStream(streamUrl) {

    const streamOptions = {seek: 0, volume: 1};
    console.log("Streaming audio from " + streamUrl);

    if (streamUrl) {
        const stream = ytdl(streamUrl, {filter: 'audioonly'});
        const dispatcher = bot.voiceConnections.first().playStream(stream, streamOptions);
    }
}

/* END HELPER METHODS */

bot.login("<BOT LOGIN ID HERE>");

https://jsfiddle.net/o3Lvqt94/

私の考えは、voiceChannel が話すのをやめたら、次の audioStream の再生を開始できるということでしたが、これは起動時に設定されていないため、イベントは失敗します。別のコマンドで変更できます。