Mess with video length

commands/fun/curses.js

@@ -0,0 +1,84 @@
+const { Command } = require('discord-akairo');
+const path = require('path');
+const os = require('os');
+const fs = require('fs');
+const { Buffer } = require('buffer');
+const attachment = require('../../utils/attachment');
+const downloader = require('../../utils/download');
+
+class cursesCommand extends Command {
+	constructor() {
+		super('curses', {
+			aliases: ['curses'],
+			category: 'fun',
+			clientPermissions: ['SEND_MESSAGES', 'ATTACH_FILES'],
+			args: [
+				{
+					id: 'link',
+					type: 'url',
+				},
+			],
+			description: {
+				content: 'Mess with video length. webm = expanding length and mp4 = very long length',
+				usage: '[link or attachment]',
+				examples: ['https://www.youtube.com/watch?v=QLCPgZ51poU']
+			}
+		});
+	}
+
+	async exec(message, args) {
+		let replaceAt = function(string, index, replacement) {
+			return string.substr(0, index) + replacement + string.substr(index + replacement.length);
+		};
+
+		let link;
+		if (args.link)
+			link = args.link.href;
+		else
+			link = await attachment(message);
+
+		let ext = path.extname(link.toLowerCase());
+		if (ext !== '.webm' || ext !== '.mp4') {
+			ext = '.mp4';
+		}
+
+		let loadingmsg = await message.channel.send('Processing <a:loadingmin:527579785212329984>');
+		downloader(link, null, `${os.tmpdir()}/${message.id}${ext}`)
+			.on('error', async err => {
+				loadingmsg.delete();
+				console.error(err);
+				return message.channel.send(err, { code: true });
+			})
+			.on('end', output => {
+				let file = fs.readFileSync(output).toString('hex');
+				
+				let searchHex = '6d766864';
+				let replaceHex = '0000017FFFFFFF';
+				let skipByte = 34;
+
+				let endResult;
+
+				if (ext === '.webm') {
+					searchHex = '2ad7b1';
+					replaceHex = '00000000';
+					skipByte = 8;
+
+					endResult = replaceAt(file, file.indexOf(searchHex) + file.substring(file.indexOf(searchHex)).indexOf('4489') + skipByte, replaceHex);
+				} else {
+					endResult = replaceAt(file, file.indexOf(searchHex) + skipByte, replaceHex);
+				}
+
+				fs.writeFileSync(`${os.tmpdir()}/cursed${message.id}${ext}`, Buffer.from(endResult, 'hex'));
+				return message.channel.send({files: [`${os.tmpdir()}/cursed${message.id}${ext}`]})
+					.catch(err => {
+						console.error(err);
+						return message.channel.send('Video is too big! try again with something smaller');
+					})
+					.then(() => {
+						loadingmsg.delete();
+					});
+			});
+
+	}
+}
+module.exports = cursesCommand;