background.js

// Variables
websiteList = ["google",
"youtube",
"facebook",
"baidu",
"yahoo",
"amazon",
"wikipedia",
"qq",
"reddit",
"twitter",
"live",
"taobao",
"msn",
"sina",
"myspace",
"yandex"
];
blackList = ["meshbeachcafepty.com","stribro.cz"];
safeDomains = ["com","org"];
var counter = 0;
var dictionary = new Typo("en_US");
var risk = 0;
// console.log("I'm the background, lol");
/*
  @description: Returns true if the URL is deemed to be suspicious
*/
var urlBool = false;
var blackListBool = false;
function checkURL(){
	var tokens = window.location.hostname.split('.')
	var extension = tokens[tokens.length - 1];//com
  var domain = tokens[tokens.length - 2];//google
  if(domain in websiteList && !(extension in safeDomains)){
    return true;
    urlBool = true;
  }
  console.log(domain);
}
/*
  @description: Returns the amount of words that are deemed to be spelled wrong
*/
function checkSpelling(){
  var str = document.body.innerText;
  var arr = str.split(' ');


  for (var i = 0; i < arr.length; i++) {
     var word = arr[i];
     if(!dictionary.check(word)){
      counter++
     }
  }
  return counter;
}
/*
  @description: Returns true if the website is in the blacklist.
*/
function isInBlackList(website){
  if(website in blackList){
    return true;
  }
}


function numberCrunch(urlBool,counter,blackListBool){
  if(urlBool){ //if URL is declared malicious
    risk += 50;
  }
  if(counter > 10){ //if number of errors exceeds 10
    risk += 20;
  }
  if(blackListBool){ //if url is in blacklist
    risk +=  70;
  }
  if(risk>100){ //if risk exceeds 100 (percent)
    risk = 100;
  }

  return risk;
}


checkURL();
// Reassigning Variables
urlBool = checkURL();

checkSpelling();
isInBlackList();
numberCrunch(urlBool,counter,blackListBool);
// Message Sending
chrome.tabs.onUpdated.addListener(function (tabId, changeInfo, tab) {  
  risk = risk;        
   if (changeInfo.status == 'complete') {   
      chrome.tabs.query({active: true, currentWindow: true}, function(tabs){
         chrome.tabs.sendMessage(tabs[0].id, {action: risk}, function(response) {});
         console.log("Message sent...awaiting arrival.")  
      });
   }
});