Use events

commands/utility/download.js

@@ -56,10 +56,10 @@ class DownloadCommand extends Command {
 
 
 		downloader(args.link, null, `${os.tmpdir()}/${filename}.mp4`)
-			.catch((err) => {
+			.on('error	', async err => {
 				return message.channel.send(err, { code: true });
 			})
-			.then(async (output) => {
+			.on('end', async output => {
 				loadingmsg.delete();
 				let file = fs.statSync(output);
 				let fileSize = file.size / 1000000.0;

utils/download.js

@@ -1,26 +1,28 @@
 const fs = require('fs');
+const events = require('events');
 const youtubedl = require('youtube-dl');
 
 module.exports = function (url, option, output) {
-	return new Promise(function(resolve, reject) {
-		if (!url) reject('Require a url!');
-		if (!output) reject('Require an output parameter! (If you see this message please send a feedback to the dev about it.)');
+	let eventEmitter = new events.EventEmitter();
 
-		if (option != null) option.push('--rm-cache-dir');
-		else option = ['--rm-cache-dir'];
+	if (!url) eventEmitter.emit('error', 'Require an url!');
+	if (!output) eventEmitter.emit('error', 'Require an output parameter! (If you see this message please send a feedback to the dev about it.)\'');
 
-		const video = youtubedl(url, option);
+	if (option != null) option.push('--rm-cache-dir');
+	else option = ['--rm-cache-dir'];
 
-		video.on('error', function error(err) {
-			console.log(err.toString());
-			reject(err.toString());
-		});
+	const video = youtubedl(url, option);
 
-		video.pipe(fs.createWriteStream(output));
+	video.on('error', function error(err) {
+		console.log(err.toString());
+		eventEmitter.emit('error', err.toString());
+	});
+
+	video.pipe(fs.createWriteStream(output));
 
-		video.on('end', function() {
-			resolve(output);
-		});
+	video.on('end', function() {
+		eventEmitter.emit('end', output);
 	});
+	return eventEmitter;
 };