Whatsapp bot

bot.js

/*
Stupid small project of mine, if you run this in a web.whatsapp console you should be good to go
Note, it looks like sending a msg in a group is bugged. And the group command doesnt work because of it
*/
var lastMessage;
setInterval(getLastMessage, 500);
var prefix = '!';
var messagesMap = new Map();
$('header ._1wjpf').click();

var commands = {
	about: {
		run: (message, args) => {
			reply('I am reins Whatsapp bot');
		}
	}, choose: {
		run: (message, args) => {
			if (!args[0]) {reply("No arguments :v"); return;}
			if (!args.join("").includes(";")) {reply('Options must be seperated by a *;*'); return;}
			else var choose = args.join(" ").split(";").filter(x => x && x != " ");
			reply(`I choose *${choose[Math.floor(Math.random()*(choose.length))].trim()}*!`);
		}
	}, help: {
		run : (message, args) => {
			msg = '*Commands*:\n';
			for (var property in commands) msg += property + '\n';
			reply(msg);
		}
	}, group: {
		run : (message, args) => {
			if (!document.getElementsByClassName('_1xGbt')[0]) {reply('An error occured!'); return;}
			if (!document.getElementsByClassName('Cpiae')[0].innerHTML.startsWith('Created')) {reply ('This is not a group chat!'); return;}
			let participants = document.getElementsByClassName('_1sYdX')[1].innerHTML.split(/\s/g)[0];
			let name = document.getElementsByClassName('_2S1VP')[0].innerHTML;
			let createdAt = document.getElementsByClassName('Cpiae')[0].innerHTML;
			
			let admins = 1;
			let users = document.getElementsByClassName('RLfQR')[0].childNodes;
			for (i = 0; i < users.length; i++) if (users[i].getElementsByClassName('_2e8Mu')[0]) admins++;
			console.log(`*${name}*\n Participants: ${participants}\n Admins: ${admins}\n CreatedAt: ${createdAt}`);
			reply(`*${name}*\n Participants: ${participants}\n Admins: ${admins}\n CreatedAt: ${createdAt}`);
		}
	}
}

function getLastMessage() {
	let messages = document.getElementsByClassName('Tkt2p');
	let message = messages[messages.length - 1];
	if (message.getAttribute('id')) return false;//Already handled
	let id = createID();
	message.setAttribute('id', id);
	
	//Need some author shit
	let content = message.getElementsByTagName("span")[0].innerHTML;
	let createdAt = message.getElementsByClassName("_3EFt_")[0].innerHTML;
	var status = message.getElementsByTagName("span")[2].getAttribute('data-icon'); //gotta change that up
	
	let newMessage = {
		id: id,
		//author: author,
		content: content,
		createdAt: createdAt,
		status: status
	};
	eventMessage(newMessage);
	lastMessage = newMessage;
	messagesMap.set(newMessage.id, newMessage);
	return newMessage;
}

function eventMessage(message) {
	if (!message.content.startsWith(prefix)) return;
	let command = message.content.substr(prefix.length).split(/\s/g)[0];
	let args = message.content.substr(prefix.length).split(/\s/g);
	args.shift();
	if (commands[command]) commands[command].run(message, args);
}

function reply(msg) {
	document.getElementsByClassName('_39LWd')[0].setAttribute('style', 'visibility: hidden');
	let input = document.getElementsByClassName('_2S1VP')[0]
	input.innerHTML = msg;
	
	//Somehow triggers the send button
	window.InputEvent = window.Event || window.InputEvent; //wtf does this do
	let event = new InputEvent('input', {bubbles: true}); //wtf does this do
	
	input.dispatchEvent(event);
	document.getElementsByClassName('_2lkdt')[0].click();
}

function createID() {
	let string = '';
	let characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

	for (var i = 0; i < 20; i++)
		string += characters.charAt(Math.floor(Math.random() * characters.length));

	return string;
}