midify

commands/fun/midify.js

@@ -0,0 +1,94 @@
+const { Command } = require('discord-akairo');
+const util = require('util');
+const exec = util.promisify(require('child_process').exec);
+const youtubedl = require('youtube-dl');
+const os = require('os');
+
+class midifyCommand extends Command {
+	constructor() {
+		super('midify', {
+			aliases: ['midify', 'wav2midi', 'w2m', 'mp32midi', 'm2m', 'sound2midi', 's2m'],
+			category: 'fun',
+			clientPermissions: ['SEND_MESSAGES', 'ATTACH_FILES'],
+			args: [
+				{
+					id: 'link',
+					type: 'string',
+				}
+			],
+			description: {
+				content: 'Transform the audio into midi',
+				usage: '[link to video/music/whatever you want to be midi]',
+				examples: ['https://www.youtube.com/watch?v=kXYiU_JCYtU']
+			}
+		});
+	}
+
+	async exec(message, args) {
+		let Attachment = (message.attachments).array();
+		let url = args.link;
+		// Get attachment link
+		if (Attachment[0] && !args.link) {
+			url = Attachment[0].url;
+		}
+
+		let input = `${os.tmpdir()}/${message.id}.mp4`;
+		let input2 = `${os.tmpdir()}/${message.id}.wav`;
+		let output = `${os.tmpdir()}/${message.id}.mid`;
+		let output2 = `${os.tmpdir()}/${message.id}.mp3`;
+
+		
+		let loadingmsg = await message.channel.send('Processing <a:loadingmin:527579785212329984>');
+
+		if (url) {
+			return youtubedl.exec(url, ['--format=mp4', '-o', input], {}, function(err) {
+				if (err) {
+					console.error(err);
+					loadingmsg.delete();
+					return message.channel.send('An error has occured, I can\'t download from the link you provided.');
+				} else {
+					// Convert to wav
+					exec(`ffmpeg -i ${input} ${input2}`)
+						.then(() => {
+							midify();
+						})
+						.catch(err => {
+							console.error(err);
+							return message.channel.send('Oh no! an error has occured during the conversion, are you sure it is a valid file?');
+						});
+				}
+			});
+		} else {
+			return message.channel.send('You need a valid video link!');
+		}
+
+		function midify() {
+			// wav to midi
+			exec(`waon -i ${input2} -o ${output}`)
+				.then(() => {
+					// midi to mp3 so we can listen from discord
+					exec(`timidity ${output} -Ow -o - | ffmpeg -i - -acodec libmp3lame -ab 64k ${output2}`)
+						.then(() => {
+							loadingmsg.delete();
+							message.delete();
+							return message.channel.send({files: [output2]})
+								.catch(err => {
+									console.error(err);
+									loadingmsg.delete();
+									return message.channel.send('On no! an error just occured! perhaps the file is too big?');
+								});
+						})
+						.catch(err => {
+							console.error(err);
+							return message.channel.send('Oh no! an error has occured during the conversion, are you sure it is a valid file?');
+						});
+				})
+				.catch(err => {
+					console.error(err);
+					return message.channel.send('Oh no! an error has occured during the conversion, are you sure it is a valid file?');
+				});
+		}
+	}
+}
+
+module.exports = midifyCommand;