discord-bot/commands/music/play.js

const { Command } = require('discord.js-commando');
const puppeteer = require('puppeteer');
const ytdl = require('ytdl-core-discord');
const Youtube = require('simple-youtube-api');
const youtube = new Youtube(process.env.YOUTUBE_API_KEY);

module.exports = class Play extends Command {
    constructor(client) {
        super(client, {
            name: 'play',
            memberName: 'play',
            group: 'music',
            description: 'plays audio from youtube or facebook',
            guildOnly: true,
            clientPermissions: ['SPEAK', 'CONNECT'],
            args: [
                {
                    key: 'query',
                    prompt: 'what do you want to listen to?',
                    type: 'string',
                    validate: query => query.length > 0
                }
            ],
            throttling: {
                usages: 1,
                duration: 5
            }
        });
    }

    run = async(message, { query }) => {
        try {
            const voiceChannel = message.member.voice.channel;

            if (!voiceChannel) return message.reply('you need to join a channel!');

            // TODO change if to switch

            if (query.match(/^(http(s)?:\/\/)?((w){3}.)?youtu(be|.be)?(\.com)?\/\S+/)) {
                const link = query.match(/^(http(s)?:\/\/)?((w){3}.)?youtu(be|.be)?(\.com)?\/\S+/)[0];
                const id = link.replace(/(>|<)/gi, '').split(/(vi\/|v=|\/v\/|youtu\.be\/|\/embed\/)/)[2].split(/[^0-9a-z_\-]/i)[0];

                const video = await youtube.getVideoByID(id);
                const title = video.title;
                const duration = this.formatDuration(video.duration);
                const thumbnail = video.thumbnails.high.url;

                const data = {
                    type: 'youtube',
                    link,
                    title,
                    duration: duration !== '00:00:00' ? duration : 'Live Stream',
                    thumbnail,
                    voiceChannel
                };

                message.guild.music.queue.push(data);

                if (message.guild.music.isPlaying === false || message.guild.music.isPlaying === undefined) {
                    message.guild.music.isPlaying = true;
                    return this.play(message.guild.music.queue, message);
                } else {
                    return message.reply(`${data.title} added to queue`);
                }
            } else if (query.match(/^(http(s)?:\/\/)?((w){3}.)?facebook?(\.com)?\/\S+\/videos\/\S+/)) {
                const link = query.match(/^(http(s)?:\/\/)?((w){3}.)?facebook?(\.com)?\/\S+\/videos\/\S+/)[0];

                const browser = await puppeteer.launch({
                    timeout: 0
                });
                const page = await browser.newPage();
                page.setDefaultNavigationTimeout(0);
                page.setDefaultTimeout(0);
                await page.goto(link, { waitUntil: 'networkidle2' });
                const metaHandle = await page.$('meta[property="og:video:url"]');
                const videoLink = await page.evaluate(meta => meta.getAttribute('content'), metaHandle);

                // const dispatcher = connection.play(videoLink);

                // dispatcher.on('start', () => {
                //     return message.reply('facebook video is playing!');
                // });
            } else if (query.match(/^(http(s)?:\/\/)?((w){3}\S)?\S+(\.)\S+\/\S+\.(\S){3}/)) {
                const link = query.match(/^(http(s)?:\/\/)?((w){3}\S)?\S+(\.)\S+\/\S+\.(\S){3}/)[0];

                // const dispatcher = connection.play(link);

                // dispatcher.on('start', () => {
                //     return message.reply('playing!');
                // });
            } else {
                const videos = await youtube.searchVideos(query, 1);
                if (!videos.length === 1) return message.reply('nothing found!');

                // const dispatcher = connection.play(await ytdl(`https://www.youtube.com/watch?v=${videos[0].raw.id.videoId}`), { type: 'opus' });

                // dispatcher.on('start', () => {
                //     return message.reply('youtube video is playing!');
                // });
            }
        } catch(err) {
            console.error(err);
            return message.reply('cannot play what you requested!');
        }
    }

    play = async(queue, messsage) => {
        try {
            const voiceChannel = queue[0].voiceChannel;
            const connection = await voiceChannel.join();

            // TODO change if to switch

            if (queue[0].type === 'youtube') {
                const dispatcher = connection.play(await ytdl(queue[0].link, { quality: 'highestaudio' }), { type: 'opus' });

                dispatcher.on('start', () => {
                    messsage.guild.music.dispatcher = dispatcher;
                    messsage.guild.music.nowPlaying = queue[0];
                    dispatcher.setVolume(messsage.guild.music.volume);
                    messsage.reply(`${queue[0].title} is playing`);
                    return queue.shift();
                });

                dispatcher.on('finish', () => {
                    if (queue.length >= 1) return this.play(queue, messsage);
                    else {
                        messsage.guild.music.isPlaying = false;
                        messsage.say('queue ended');
                        return voiceChannel.leave();
                    }
                });

                dispatcher.on('error', err => {
                    messsage.guild.music.queue = [];
                    messsage.guild.music.isPlaying = false;
                    messsage.guild.music.nowPlaying = false;
                    messsage.say('error occured');
                    voiceChannel.leave();
                    throw err;
                });
            }
        } catch(err) {
            console.error(err);
            return message.reply('cannot play what you requested!');
        }
    }

    formatDuration = durationObject => {
        const duration = `${durationObject.hours < 10 ? '0' + durationObject.hours : durationObject.hours ? durationObject.hours : '00'}:${durationObject.minutes < 10 ? '0' + durationObject.minutes : durationObject.minutes ? durationObject.minutes : '00'}:${durationObject.seconds < 10 ? '0' + durationObject.seconds : durationObject.seconds ? durationObject.seconds : '00'}`;
        
        return duration;
    }
}