var startTime = getZoneBasedDateTime('+5.5');
var isOnIOS   = navigator.userAgent.match(/iPad/i)|| navigator.userAgent.match(/iPhone/i);
var eventName = isOnIOS ? "pagehide" : "beforeunload";
var userBrowserId = getUserBrowserId();
var trackingUrl = 'http://172.104.180.251/inddms/index.php/Tracking/trackPageView';

//When the user leaves the page(closes the window/tab, clicks a link)...
window.addEventListener(eventName, function (event) {
  trackPageView(startTime);
});

function trackPageView(startTime){
  var xmlhttp;  //Make a variable for a new ajax request.
  //If it's a decent browser...
  if (window.XMLHttpRequest){
    // code for IE7+, Firefox, Chrome, Opera, Safari
    xmlhttp = new XMLHttpRequest();//Open a new ajax request.
  } else { //If it's a bad browser...
    // code for IE6, IE5
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); //Open a different type of ajax call.
  }

  var endTime = getZoneBasedDateTime('+5.5');

  //Send the time on the page to a php script of your choosing.
  var url = trackingUrl+"?actionStartTime="+startTime+"&actionEndTime="+endTime+"&pageUrl="+window.location.href+"&resolution="+screen.width+"x"+screen.height+"&refererUrl="+document.referrer+"&userBrowserId="+userBrowserId;

  //The false at the end tells ajax to use a synchronous call which wont be severed by the user leaving.
  xmlhttp.open("GET",url,false);
  xmlhttp.send(null); //Send the request and don't wait for a response.
}

function getUserBrowserId(){
  var userBrowserId = readCookie('userBrowserId');
  if(userBrowserId == null || userBrowserId == ''){
    var rString = randomString(32, '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
    setCookie('userBrowserId',rString,90,'','digicliff.com');
    userBrowserId = readCookie('userBrowserId');
  }
  jQuery('.userBrowserId').val(userBrowserId);
  return userBrowserId;
}

function setCookie( name, value, expires, path, domain, secure ){
  // set time, it's in milliseconds
  var today = new Date();
  today.setTime( today.getTime() );
  if(expires){
    expires = expires * 1000 * 60 * 60 * 24;
  }
  var expires_date = new Date( today.getTime() + (expires) );
  document.cookie = name + "=" +escape( value ) +
  ( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) +
  ( ( path ) ? ";path=" + path : "" ) +
  ( ( domain ) ? ";domain=" + domain : "" ) +
  ( ( secure ) ? ";secure" : "" );
}

function readCookie(name){
  var cookiename = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++){
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(cookiename) == 0){
      return c.substring(cookiename.length,c.length);
    }
  }
  return null;
}

function randomString(length, chars) {
  var result = '';
  for (var i = length; i > 0; --i) result += chars[Math.floor(Math.random() * chars.length)];
  return result;
}

function getZoneBasedDateTime(offset) {
    d = new Date();
    utc = d.getTime() + (d.getTimezoneOffset() * 60000);
    myDate = new Date(utc + (3600000*offset));

    var year = myDate.getFullYear();

    var month = myDate.getMonth() + 1;
    month = month < 10 ? '0'+month : month;

    var date = myDate.getDate();
    date = date < 10 ? '0'+date : date;

    var hour = myDate.getHours();
    hour = hour < 10 ? '0'+hour : hour;

    var mins = myDate.getMinutes();
    mins = mins < 10 ? '0'+mins : mins;

    var secs = myDate.getSeconds();
    secs = secs < 10 ? '0'+secs : secs;

    return year + '-' +month + '-' +  date + ' '+hour+ ':'+mins+ ':'+secs;
}