A v9 Discord.JS music bot in 100 lines or less

.eslintrc.json

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+{
+    "env": {
+        "es6": true,
+        "node": true
+    },
+    "extends": "eslint:recommended",
+    "parserOptions": {
+        "sourceType": "module"
+    },
+    "rules": {
+        "no-console": "off",
+        "indent": [
+            "error",
+            "tab"
+        ],
+        "linebreak-style": [
+            "error",
+            "windows"
+        ],
+        "quotes": [
+            "warn",
+            "single"
+        ],
+        "semi": [
+            "warn",
+            "always"
+        ]
+    }
+}

.gitignore

@@ -45,3 +45,9 @@ $RECYCLE.BIN/
 Network Trash Folder
 Temporary Items
 .apdisk
+
+# Ignores
+node_modules/*
+
+start.bat
+tokens.json

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2016 BDISTIN
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

package.json

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+{
+  "name": "ohgodmusicbot",
+  "version": "1.0.0",
+  "description": "A v9 Discord.JS music bot in 100 lines or less",
+  "main": "server.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "dependencies": {
+    "discord.js" : "github:hydrabolt/discord.js#indev",
+	"ytdl-core" :  "github:fent/node-ytdl-core#master",
+  },
+  "author": "BDISTIN",
+  "license": "MIT"
+}

server.js

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+const Discord = require('discord.js');
+const yt = require('ytdl-core');
+const tokens = require('./tokens.json');
+const client = new Discord.Client();
+let queue = {};
+client.on('message', msg => {
+	if (msg.content.startsWith(tokens.prefix + 'play')) {
+		if (queue[msg.guild.id].playing) return msg.channel.sendMessage('Already Playing');
+		if (queue[msg.guild.id] === undefined) return msg.channel.sendMessage('Add some songs to the queue first with ++add');
+		if (!client.voiceConnections.exists('channel', msg.member.voiceChannel)) return msg.channel.sendMessage('Join me to a voice channel with ++join first');
+		let myVoiceConnection = client.voiceConnections.find('channel', msg.member.voiceChannel);
+		let dispatcher;
+		console.log(queue);
+		(function play(song) {
+			queue[msg.guild.id].playing = true;
+			console.log(song);
+			if (song === undefined) {
+				msg.channel.sendMessage('Queue is empty');
+				queue[msg.guild.id].playing = false;
+				msg.member.voiceChannel.leave();
+				return;
+			}
+			msg.channel.sendMessage(`Playing: **${song.title}**`);
+			dispatcher = myVoiceConnection.playStream(yt(song.url, { audioonly: true }));
+			let collector = msg.channel.createCollector(m => m);
+			collector.on('message', m => {
+				if (m.content.startsWith(tokens.prefix + 'pause')) {
+					dispatcher.pause();
+					msg.channel.sendMessage('paused');
+				} else if (m.content.startsWith(tokens.prefix + 'resume')){
+					dispatcher.resume();
+					msg.channel.sendMessage('resumed');
+				} else if (m.content.startsWith(tokens.prefix + 'skip')){
+					dispatcher.end();
+					msg.channel.sendMessage('skipped');
+				} else if (m.content.startsWith('volume+')){
+					if (Math.round(dispatcher.volume*100) >= 100) return msg.channel.sendMessage(`Volume: ${Math.round(dispatcher.volume*100)}%`);
+					const amount = m.content.split('+').length-1;
+					dispatcher.setVolume(Math.max((dispatcher.volume*100 + 4*amount)/100,1));
+					msg.channel.sendMessage(`Volume: ${Math.round(dispatcher.volume*50)}%`);
+				} else if (m.content.startsWith('volume-')){
+					if (Math.round(dispatcher.volume*100) <= 0) return msg.channel.sendMessage(`Volume: ${Math.round(dispatcher.volume*100)}%`);
+					const amount = m.content.split('-').length-1;
+					dispatcher.setVolume(Math.min((dispatcher.volume*100 - 4*amount)/100,0));
+					msg.channel.sendMessage(`Volume: ${Math.round(dispatcher.volume*50)}%`);
+				}
+			});
+			dispatcher.on('end', () => {
+				setTimeout(()=>{
+					collector.stop();
+					queue[msg.guild.id].songs.shift();
+					play(queue[msg.guild.id].songs[0]);
+				}, 1000);
+			});
+			dispatcher.on('error', (err) => {
+				collector.stop();
+				queue[msg.guild.id].songs.shift();
+				queue[msg.guild.id].playing = false;
+				msg.channel.sendMessage('error: ' + err);
+				msg.member.voiceChannel.leave();
+				return;
+			});
+		})(queue[msg.guild.id].songs[0]);
+	} else if (msg.content.startsWith(tokens.prefix + 'join')) {
+		const voiceChannel = msg.member.voiceChannel;
+		if (!voiceChannel || voiceChannel.type !== 'voice') return msg.reply('I couldn\'t connect to your voice channel...');
+		voiceChannel.join();
+	} else if (msg.content.startsWith(tokens.prefix + 'add')) {
+		let url = msg.content.slice(6);
+		yt.getInfo(url, (err, info) => {
+			if(err) return msg.channel.sendMessage('Invalid YouTube Link: ' + err);
+			if (!queue.hasOwnProperty(msg.guild.id)) {
+				queue[msg.guild.id] = {};
+				queue[msg.guild.id].playing = false;
+				queue[msg.guild.id].songs = [];
+			}
+			queue[msg.guild.id].songs.push({url: url, title: info.title});
+			msg.channel.sendMessage(`added **${info.title}** to the queue`);
+		});
+	} else if (msg.content.startsWith(tokens.prefix + 'help')) {
+		let tosend = ['```xl',
+		'++join : "Join Voice channel of msg sender"',
+		'++add : "Add a valid youtube link to the queue"',
+		'++play : "Play the music queue if already joined to a voice channel',
+		'++pause : "pauses the music, only available while play command is running."',
+		'++resume : "resumes the music, only available while play command is running."',
+		'++skip : "skips the playing song, only available while play command is running."',
+		'volume+(+++) : "increases volume by 2%/+, only available while play command is running."',
+		'volume+(---) : "decreases volume by 2%/-, only available while play command is running."',
+		'notes : "commands are case sensitive, because I want to be a lazy ass on this bot."',
+		'```'];
+		msg.channel.sendMessage(tosend.join('\n'));
+	} else if (msg.content.startsWith(tokens.prefix + 'reboot')) {
+		if (msg.author.id == tokens.adminID) process.exit();
+	}
+});
+client.login(tokens.d_token);
+client.on('ready', () => {
+	console.log('ready!');
+});

tokens.json.example

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+{
+    "d_token" : "YOUR DISCORD APP TOKEN",
+}