Постановка звука в очередь для воспроизведения через Discord Bot

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Постановка звука в очередь для воспроизведения через Discord Bot

Post author:admin
Запись опубликована:9 мая, 2023
Post category:Вопросы по программированию

#javascript #audio #youtube-api #bots #discord

#javascript #Аудио #youtube-api #боты #Discord

Вопрос:

В данный момент я занимаюсь написанием бота для Discord.

Мне удалось заставить его запрашивать YouTube на основе заданных поисковых запросов, а затем воспроизводить аудио из верхнего результата, однако я столкнулся с проблемой, когда я пытаюсь поставить звуковые дорожки в очередь в списке и воспроизвести их после завершения аудиопотока.

 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 amp;amp; 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=snippetamp;q=${escape(searchKeywords)}amp;key=${API_KEY}`;

    request(requestUrl, (error, response) => {
        if (!error amp;amp; 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/

Моя идея заключалась в том, что я мог бы начать воспроизведение следующего аудиопотока, как только голосовой канал перестанет говорить, однако событие завершается неудачей, поскольку это не установлено при запуске, хотя я мог бы это сделать, я не думаю, что это удовлетворит мои потребности, поскольку голосовой канал можно изменить другой командой.

Ответ №1:

Я использовал ваш код в качестве основы для своего собственного бота Discord и устранил ошибку, о которой вы упомянули. Я просто изменил

 dispatcher.on('end', () => {                        
  PlayNextStreamInQueue();
});

Для

  dispatcher.on('end', () => {                       
   dispatcher = null;                 
   PlayNextStreamInQueue();
 });

Ответ №2:

Мое решение.

index.js

 var discord = require("discord.js");        // discord library
var ytdl = require('ytdl-core');            // youtube download library
var youtube = require('./youtube.js');      // performs youtube API requests

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

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]);
            break;
        case "*play":
            PlayCommand(parameters.join(" "), message);
            break;
        case "*playqueue":
            PlayQueueCommand(message);
            break;
    }
});

/* 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");
    originalMessage.reply("*playqueue - Lists the audio remaining in the play queue");
}

/// plays audio based on results from youtube search
function PlayCommand(searchTerm) {

    // if not connected to a voice channel then connect to first one
    if (bot.voiceConnections.array().length == 0) {
        var defaultVoiceChannel = bot.channels.find(val => val.type === 'voice').name;
        JoinCommand(defaultVoiceChannel);
    }

    // search youtube using the given search search term and perform callback action if video is found
    youtube.search(searchTerm, QueueYtAudioStream);
}

/// lists out all music queued to play
function PlayQueueCommand(message) {
    var queueString = "";

    for(var x = 0; x < ytAudioQueue.length; x  ) {
        queueString  = ytAudioQueue[x].videoName   ", ";
    }

    queueString = queueString.substring(0, queueString.length - 2);
    message.reply(queueString);
}

/// joins the bot to the specified voice channel
function JoinCommand(channelName) {
    var voiceChannel = GetChannelByName(channelName);

    if (voiceChannel) {
        voiceChannel.join();
        console.log("Joined "   voiceChannel.name);
    }

    return voiceChannel;
}

/* 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;
}

/// Queues result of Youtube search into stream
function QueueYtAudioStream(videoId, videoName) {
    var streamUrl = `${youtube.watchVideoUrl}${videoId}`;

    if (!ytAudioQueue.length) {
        ytAudioQueue.push(
            {
                'streamUrl': streamUrl,
                'videoName': videoName
            }
        );

        console.log("Queued audio "   videoName);
        PlayStream(ytAudioQueue[0].streamUrl);
    }
    else {
        ytAudioQueue.push(
            {
                'streamUrl': streamUrl,
                'videoName': videoName
            }
        );

        console.log("Queued audio "   videoName);
    }

}

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

    const streamOptions = {seek: 0, volume: 1};

    if (streamUrl) {
        const stream = ytdl(streamUrl, {filter: 'audioonly'});

        if (dispatcher == null) {

            var voiceConnection = bot.voiceConnections.first();
            //console.log(voiceConnection);

            if (voiceConnection) {

                console.log("Now Playing "   ytAudioQueue[0].videoName);
                dispatcher = bot.voiceConnections.first().playStream(stream, streamOptions);

                dispatcher.on('end', () => {
                    PlayNextStreamInQueue();
                });

                dispatcher.on('error', (err) => {
                    console.log(err);
                });
            }
        }
        else {
            dispatcher = bot.voiceConnections.first().playStream(stream, streamOptions);
        }
    }
}

/// Plays the next stream in the queue
function PlayNextStreamInQueue() {

    ytAudioQueue.splice(0, 1);

    // if there are streams remaining in the queue then try to play
    if (ytAudioQueue.length != 0) {
        console.log("Now Playing "   ytAudioQueue[0].videoName);
        PlayStream(ytAudioQueue[0].streamUrl);
    }
}
/* END HELPER METHODS */

bot.login("redacted");

youtube.js

 var request = require('superagent');

const API_KEY = "redacted";
const WATCH_VIDEO_URL = "https://www.youtube.com/watch?v=";

exports.watchVideoUrl = WATCH_VIDEO_URL;

exports.search = function search(searchKeywords, callback) {
    var requestUrl = 'https://www.googleapis.com/youtube/v3/search'   `?part=snippetamp;q=${escape(searchKeywords)}amp;key=${API_KEY}`;

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

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

            for (var item of body.items) {
                if (item.id.kind === 'youtube#video') {
                    callback(item.id.videoId, item.snippet.title);
                    return; // prevent adding entire list of youtube videos
                }
            }
        }
        else {
            console.log("Unexpected error when searching YouTube");
            return;
        }
    });

    return;
};

Ответ №3:

Я бы сказал, сохранить очередь в массиве

 var que = {
  0 = "LINK";
};

и вы восстанавливаете его с помощью

 que[0]

и автоматическая очередь

 function skip() {
  for (var i = 0; var length = que.length; i < length; i  ) {
    if (i != length) {
      que[i] = que[(i 1)];
    } else {
      que[i] = null;
    }
  }
}

чтобы показать очередь

 function showque() {
  var queText = "";
  for (var i = 0; var length = que.length; i < length; i  ) {
    queText = queText   "["   i   "] "   que[i]   "n";
  }
  return queText;
}

фрагмент сообщения для отправки

 message("ANYTHING BEFORE THE QUEn"   showque()   "ANYTHING AFTER");

надеюсь, это должно сработать.