play.js

const commando = require("discord.js-commando");
const config = require("../.././config.json");
const ytdl = require("ytdl-core");
const { RichEmbed } = require("discord.js");

class play extends commando.Command {
  constructor(client) {
    super(client, {
      name: "play",
      aliases: ["p"],
      group: "music",
      memberName: "play",
      description: "Aditi joins the user's current voice channel and plays a song.",
      clientPermissions: ["CONNECT", "SPEAK"],
      args: [{
        key: "link",
        prompt: "What do you want me to play?",
        type: "string"
      }]
    });
  } async run(message, args) {
    const queue = new Map();
    const serverQueue = queue.get(message.guild.id);
    const avatarURL = this.client.user.avatarURL;

    const voiceChannel = message.member.voiceChannel;
    var embed = new RichEmbed()
      .setAuthor("Song Status", avatarURL)
      .setColor(message.guild.roles.find("name", "Aditi").color);
    if (!voiceChannel) {
      embed.setTitle("Error!")
        .setDescription("You need to be in a voice channel before I can connect to one.");
      return message.channel.send({embed});
    }
    const songInfo = await ytdl.getInfo(args.link);
    const song = {
      title: songInfo.title,
      url: songInfo.video_url,
    };
    if (!serverQueue) {
      const queueConstruct = {
        textChannel: message.channel,
        voiceChannel: voiceChannel,
        connection: null,
        songs: [],
        volume: 5,
        playing: true
      };
      queue.set(message.guild.id, queueConstruct);
      queueConstruct.songs.push(song);
      try {
        var connection = await voiceChannel.join();
        queueConstruct.connection = connection;
        playSong(message.guild, queueConstruct.songs[0], avatarURL);
      } catch (error) {
        console.error(error);
        embed.setTitle("Error!")
          .setDescription("I could not join this voice channel due to an unknown error.");
        queue.delete(message.guild.id);
        return message.channel.send({embed});
      }
    } else {
      serverQueue.songs.push(song);
      return message.channel.send(`**${song.title}** has been added to the queue.`); // Redo!!! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    }
    return undefined;
    function playSong(guild, song, avatarURL) {
      var embed = new RichEmbed()
       .setAuthor("Song Status", avatarURL)
       .setColor(message.guild.roles.find("name", "Aditi").color);
      const serverQueue = queue.get(guild.id);
      if (!song) {
       serverQueue.voiceChannel.leave();
       queue.delete(guild.id);
       embed.setTitle("There are no more songs remaining in the queue!")
         .setDescription("I'm going to leave this voice channel now.");
       return;
      }
      const dispatcher = serverQueue.connection.playStream(ytdl(song.url))
       .on("end", () => {
         embed.setTitle("Song ended.");
         serverQueue.songs.shift();
         playSong(guild, serverQueue.songs[0], avatarURL);
         message.channel.send({embed});
       }).on("error", error => {
         console.error(error);
         embed.setTitle("Error!")
           .setDescription("I caught an unknown error.");
         message.channel.send({embed});
       });
      dispatcher.setVolumeLogarithmic(5 / 5);
    }
  }
}

module.exports = play;