Discord Player

Note: this module uses recent discordjs features and requires discord.js version 12.

Discord Player is a powerful Node.js module that allows you to easily implement music commands. Everything is customizable, and everything is done to simplify your work without limiting you!

Installation

npm install --save discord-player

Install opusscript or node-opus:

npm install --save opusscript

Install FFMPEG and you're done!

Player

const Discord = require("discord.js"),
client = new Discord.Client(),
settings = {
    prefix: "!",
    token: "Your Discord Token"
};

const { Player } = require("discord-player");
// Create a new Player (Youtube API key is your Youtube Data v3 key)
const player = new Player(client, "YOUTUBE API KEY");
// To easily access the player
client.player = player;

client.on("ready", () => {
    console.log("I'm ready !");
});

client.login(settings.token);

You can pass a third parameter when instantiating the class Player: the options object:
options.leaveOnEnd: whether the bot should leave the voice channel when there is no more song in the queue.
options.leaveOnStop: whether the bot should leave the voice channel when the stop() function is used. options.leaveOnEmpty: whether the bot should leave the voice channel if there is no more member in it.

Features Overview

You need to init the guild queue using the play() function, then you are able to manage the queue using the following functions:

// Play a song in the voice channel and init the guild queue
client.player.play(voiceChannel, songName);
// Add a song to the queue
client.player.addToQueue(guildID, songName);
// Clear the queue
client.player.clearQueue(guildID);
// Get the queue
client.player.getQueue(guildID);
// Skip the current song
client.player.skip(guildID);
// Pause
client.player.pause(guildID);
// Resume
client.player.resume(guildID);
// Stop
client.player.stop(guildID);
// Check if music is playing in a guild
client.player.isPlaying(guildID);

Event messages

client.player.getQueue(guildID)
.on('end', () => {
    message.channel.send('There is no more music in the queue!');
})
.on('songChanged', (oldSong, newSong) => {
    message.channel.send(`Now playing ${newSong.name}...`);
})
.on('channelEmpty', () => {
    message.channel.send('Stop playing, there is no more member in the voice channel...');
});

Examples

Play

To play a song, use the client.player.play() function.

Usage:

client.player.play(voiceChannel, songName);

Example:

client.on('message', async (message) => {

    const args = message.content.slice(settings.prefix.length).trim().split(/ +/g);
    const command = args.shift().toLowerCase();
    
    // !play Despacito
    // will play "Despacito" in the member voice channel

    if(command === 'play'){
        let song = await client.player.play(message.member.voice.channel, args[0])
        message.channel.send(`Currently playing ${song.name}!`);
    }

Pause

To pause the current song, use the client.player.pause() function.

Usage:

client.player.pause(guildID);

Example:

client.on('message', async (message) => {

    const args = message.content.slice(settings.prefix.length).trim().split(/ +/g);
    const command = args.shift().toLowerCase();

    if(command === 'pause'){
        let song = await client.player.pause(message.guild.id);
        message.channel.send(`${song.name} paused!`);
    }

});

Resume

To resume the current song, use the client.player.resume() function.

Usage:

client.player.resume(guildID);

Example:

client.on('message', async (message) => {

    const args = message.content.slice(settings.prefix.length).trim().split(/ +/g);
    const command = args.shift().toLowerCase();

    if(command === 'resume'){
        let song = await client.player.resume(message.guild.id);
        message.channel.send(`${song.name} resumed!`);
    }

});

Stop

To stop the music, use the client.player.stop() function.

Usage:

client.player.stop(guildID);

Example:

client.on('message', (message) => {

    const args = message.content.slice(settings.prefix.length).trim().split(/ +/g);
    const command = args.shift().toLowerCase();

    if(command === 'stop'){
        client.player.stop(message.guild.id);
        message.channel.send('Music stopped!');
    }

});

SetVolume

To update the volume, use the client.player.setVolume() function.

Usage:

client.player.setVolume(guildID, percent);

Example:

client.on('message', (message) => {

    const args = message.content.slice(settings.prefix.length).trim().split(/ +/g);
    const command = args.shift().toLowerCase();

    if(command === 'setvolume'){
        client.player.setVolume(message.guild.id, parseInt(args[0]));
        message.channel.send(`Volume set to ${args[0]} !`);
    }

});

AddToQueue

To add a song to the queue, use the client.player.addToQueue() function.

Usage:

client.player.addToQueue(guildID, songName);

Example:

In this example, you will see how to add a song to the queue if one is already playing.

client.on('message', async (message) => {

    const args = message.content.slice(settings.prefix.length).trim().split(/ +/g);
    const command = args.shift().toLowerCase();

    if(command === 'play'){
        let aSongIsAlreadyPlaying = client.player.isPlaying(message.guild.id);
        // If there's already a song playing 
        if(aSongIsAlreadyPlaying){
            // Add the song to the queue
            let song = await client.player.addToQueue(message.guild.id, args[0]);
            message.channel.send(`${song.name} added to queue!`);
        } else {
            // Else, play the song
            let song = await client.player.play(message.member.voice.channel, args[0]);
            message.channel.send(`Currently playing ${song.name}!`);
        }
    }

});

ClearQueue

To clear the queue, use the client.player.clearQueue() function.

Usage:

client.player.clearQueue(guildID);

Example:

client.on('message', (message) => {

    const args = message.content.slice(settings.prefix.length).trim().split(/ +/g);
    const command = args.shift().toLowerCase();

    if(command === 'clear-queue'){
        client.player.clearQueue(message.guild.id);
        message.channel.send('Queue cleared!');
    }

});

GetQueue

To get the server queue, use the client.player.getQueue() function.

Usage:

client.player.getQueue(guildID);

Example:

client.on('message', (message) => {

    const args = message.content.slice(settings.prefix.length).trim().split(/ +/g);
    const command = args.shift().toLowerCase();

    if(command === 'queue'){
        let queue = await client.player.getQueue(message.guild.id);
        message.channel.send('Server queue:\n'+(queue.songs.map((song, i) => {
            return `${i === 0 ? 'Current' : `#${i+1}`} - ${song.name} | ${song.author}`
        }).join('\n')));
    }

    /**
     * Output:
     * 
     * Server queue:
     * Current - Despacito | Luis Fonsi
     * #2 - Memories | Maroon 5
     * #3 - Dance Monkey | Tones And I
     * #4 - Circles | Post Malone
     */

});

Skip

To skip the current song, use the client.player.skip() function.

Usage:

client.player.skip(guildID);

Example:

client.on('message', async (message) => {

    const args = message.content.slice(settings.prefix.length).trim().split(/ +/g);
    const command = args.shift().toLowerCase();

    if(command === 'skip'){
        let song = await client.player.skip(message.guild.id);
        message.channel.send(`${song} skipped!`);
    }

});

Info Messages

You can send a message when the queue ends or when the song changes:

client.on('message', (message) => {

    const args = message.content.slice(settings.prefix.length).trim().split(/ +/g);
    const command = args.shift().toLowerCase();

    if(command === 'play'){
        let song = await client.player.play(message.member.voice.channel, args[0]);
        song.queue.on('end', () => {
            message.channel.send('The queue is empty, please add new songs!');
        });
        song.queue.on('songChanged', (oldSong, newSong) => {
            message.channel.send(`Now playing ${newSong}...`);
        });
    }

Handle errors

There are 2 main errors that you can handle like this:

client.on('message', (message) => {

    const args = message.content.slice(settings.prefix.length).trim().split(/ +/g);
    const command = args.shift().toLowerCase();

    // Error 1:
    // Song not found
    if(command === 'play'){
        client.player.play(message.member.voice.channel, args[0]).then((song) => {
            message.channel.send(`Currently playing ${song.name}!`);
        }).catch(() => {
            message.channel.send(`No song found for ${args[0]}`);
        });
    }

    // Error 2:
    // Not playing
    if(command === 'queue'){
        let playing = client.player.isPlaying(message.guild.id);
        if(!playing) return message.channel.send(':x: No songs currently playing!');
        // you are sure it works:
        client.player.getQueue(message.guild.id);
    }

});