chatbot.js

var xkcd;
var xkcdLoaded = false;

function chat(msg) {
	document.getElementById('input').value = msg.replace(/<\/?i>/g, "*");
	document.getElementById("sayit-button").click();
}

function getMessage(number) {
	var messages = document.getElementsByClassName("content");
	var message = messages[messages.length - number].innerHTML;
	return message;
}

function loop() {
  var message = getMessage(1);
  var messageL = message.toLowerCase();
	do {
    
		if (message === getMessage(2) ||
     		!messageL.includes("@epictck")) {
			break;
		}
    
    if (messageL.includes("XKCD")){
      var split = messageL.split(" ");
      getXKCD(split[split.indexOf("XKCD") + 1]);
    }
    
    if(xkcdLoaded){
      chat(xkcd.img);
			chat(xkcd);
    }
	} while (false);
}

function stopBot(){ clearInterval(loopInterval); }
var loopInterval;
function startBot(){ loopInterval = setInterval(loop, 6000); }

function getXKCD(number){

  var link = "http://dynamic.xkcd.com/api-0/jsonp/comic/"+
  number+"?callback=gotcha";
  var script = document.createElement("script");
  script.src = link;
  var head = document.getElementsByTagName("head")[0];
  head.appendChild(script);
  return;
}
function gotcha(data){
    xkcd = data;
    xkcdLoaded = true;  
}
start();