Acquisition Dimension in Google Analytics - GTM

acquisitionCustomDimension-GTM

<script>
/* UTM Tracking - Acquisition/First Attribution Custom Dimension - GTM
 * @Ritwikga
 */

var cookie_name = 'ds_utm'     //Name of Cookie
var cookie_duration = 180   //days



var queryParam = window.location.search
if(queryParam.search('utm_source') > -1 && queryParam.search('utm_medium') > -1)
{
cookieModify(cookie_name, true)
} else {cookieModify(cookie_name, false)}

function cookieModify(cookie_name, utms)
{  
if(!readCookie(cookie_name))
{
if(utms)
{
var source = /utm_source=([^&]+)/g.exec(queryParam)[1]
var medium = /utm_medium=([^&]+)/g.exec(queryParam)[1]
var campaign = /utm_campaign=([^&]+)/g.exec(queryParam)?/utm_campaign=([^&]+)/g.exec(queryParam)[1]:'undefined'
} else 
{
var source = (document.referrer == "") ? "direct" : document.referrer  
var medium = (source === "direct") ? "none" : ""
var campaign = "none"

if(queryParam.search('gclid=') > -1)
{source = "google";medium = "cpc"}

if(queryParam.search('fbclid=') > -1)
{source = "facebook.com";medium = "referral"}

if(source.search(/www\.google|www\.bing|duckduckgo|yandex/g) > -1)
{medium = "organic"}

source = source.replace(/\//g,'').replace(/http:|https:/,'')   //remove https://
}
var date = new Date();
var dateArray = date.toLocaleDateString('en-US').split('/')
var acquisitionDate = dateArray[2]+("0" + dateArray[0]).slice(-2)+("0" + dateArray[1]).slice(-2)
var acquisitionMonth = ("0" + dateArray[0]).slice(-2)
var acquisitionContent = location.pathname
  
var cookie_value = 'utm_source='+source+'&utm_medium='+medium+'&utm_campaign='+campaign+'&utm_content='+location.pathname+'&utm_date='+acquisitionDate+'&utm_month='+acquisitionMonth;
createCookie(cookie_name, btoa(cookie_value) ,cookie_duration)
  
}
else 
{ 
var old_utms = readCookie(cookie_name)
old_utms = atob(old_utms)
var source = /utm_source=([^&]+)/g.exec(old_utms)[1]
var medium = /utm_medium=([^&]+)/g.exec(old_utms)[1]
var campaign = /utm_campaign=([^&]+)/g.exec(old_utms)?/utm_campaign=([^&]+)/g.exec(old_utms)[1]:'undefined'

var acquisitionContent = /utm_content=([^&]+)/g.exec(old_utms)[1]
var acquisitionDate = /utm_date=([^&]+)/g.exec(old_utms)[1]  
var acquisitionMonth = /utm_month=([^&]+)/g.exec(old_utms)[1]
}  
dataLayer.push({'event':'firstAttribution','acquisitionSource': source ,'acquisitionMedium': medium, 'acquisitionCampaign': campaign, 'acquisitionContent':acquisitionContent, 'acquisitionDate': acquisitionDate,'acquisitionMonth': acquisitionMonth })

}


// Source : https://www.quirksmode.org/js/cookies.html ///
function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else {var expires = "";}

  var domainName = /\.[^\s]+/g.exec(location.hostname)[0]
  if(location.hostname.match(/\./g).length == 1){
  domainName = location.hostname;
  }
  
  document.cookie = name+"="+value+expires+"; path=/; domain="+domainName;
}

function readCookie(name) {
  var nameEQ = 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(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

function eraseCookie(name) {
  createCookie(name,"",-1);
}
</script>