JS to retrieve Traffic Data Sources without Google Analytics Cookies

traffic_data_sources.js

var __firstSessionCookieName = '$$FIRST_SESSION_COOKIE_NAME$$';
var __returningSessionCookieName = '$$RETURNING_SESSION_COOKIE_NAME$$';
var __cookieExpiration = '$$COOKIE_GMT_EXPIRATION$$';
var __reviveFirstSession = true;  //Revive first session and avoids saving returning session 
var __customCampaignParam = '$$CUSTOM_CAMPAIGN_QUERY_PARAM$$';


function __crumbleCookie(a) {
  for (var d = document.cookie.split(";"), c = {}, b = 0; b < d.length; b++) {
    var e = d[b].substring(0, d[b].indexOf("=")).trim();
    c[e] = d[b].substring(d[b].indexOf("=") + 1, d[b].length).trim()
  }
  if (a && c[a]) {
    var ret_obj = {};
    for (var i = 0; i < c[a].split('$').length; i++) {
      if (c[a].split("$")[i].split(':').length === 2) {
        if (c[a].split("$")[i].split(':')[1]) {
          ret_obj[c[a].split("$")[i].split(':')[0]] = c[a].split("$")[i].split(':')[1];
        }
      }
    }
    return ret_obj
  }
  return undefined;

}

function __bakeCookie(a, d, c, b, e, i) {

  document.cookie = a + "=" + d + (c ? ";expires=" + c : "") + (b ? ";path=" + b : "") + (e ? ";domain=" + e : "") + (i ? ";secure" : "")
}

function __writeLogic(n, __reviveFirstSession) {
  var a = __getTrafficSource(__reviveFirstSession);

  a = a.replace(/\|{2,}/g, "|");
  a = a.replace(/^\|/, "");
  a = unescape(a);

  __bakeCookie(n, a, __cookieExpiration, "/", "", "")
}

function __getParam(s, q) {
  try {
    var match = s.match('[?&]' + q + '=([^&]+)');
    return match ? match[1] : '';
  } catch (e) {
    return '';
  }
}

function __calculateTrafficSource() {
  var source = '', medium = '', campaign = '', term = '', content = '';
  var search_engines = [['bing', 'q'], ['google', 'q'], ['yahoo', 'q'], ['baidu', 'q'], ['yandex', 'q'], ['ask', 'q']];	//List of search engines names and search terms
  var social_providers = [['twitter', 't.co'], ['facebook', 'facebook.com'], ['youtube', 'youtube.com']];	//List of social providers names and domains

  var ref = document.referrer;
  ref = ref.substr(ref.indexOf('//') + 2);
  ref_domain = ref;
  ref_path = '/';
  ref_search = '';

  // Checks for campaign parameters
  var url_search = document.location.search;

  if (url_search.indexOf('utm_source') > -1) {
    source = __getParam(url_search, 'utm_source');
    medium = __getParam(url_search, 'utm_medium');
    campaign = __getParam(url_search, 'utm_campaign');
    term = __getParam(url_search, 'utm_term');
    content = __getParam(url_search, 'utm_content');
  } else if (__getParam(url_search, 'gclid')) {
    source = 'google';
    medium = 'cpc';
    campaign = '(not set)';
  } else if (__getParam(url_search, 'fbclid')) {
    source = 'facebook';
    medium = 'social';
    campaign = '(not set)';
  } else if (ref) {

    // separate domain, path and query parameters
    if (ref.indexOf('/') > -1) {
      ref_domain = ref.substr(0, ref.indexOf('/'));
      ref_path = ref.substr(ref.indexOf('/'));
      if (ref_path.indexOf('?') > -1) {
        ref_search = ref_path.substr(ref_path.indexOf('?') + 1);
        ref_path = ref_path.substr(0, ref_path.indexOf('?'));
      }
    }
    medium = 'referral';
    source = ref_domain;
    // Extract term for organic source
    for (var i = 0; i < search_engines.length; i++) {
      if (ref_domain.indexOf(search_engines[i][0]) > -1) {
        medium = 'organic';
        source = search_engines[i][0];
        term = __getParam(ref_search, search_engines[i][1]) || '(not provided)';
        break;
      }
    }
    for (var j = 0; j < social_providers.length; j++) {
      if (ref_domain.indexOf(social_providers[j][1]) > -1) {
        medium = 'social';
        source = social_providers[j][0];
        break;
      }
    }
  }
  if (__customCampaignParam && __customCampaignParam.length) {
    campaign = campaign.length ? campaign : unescape(__getParam(url_search, __customCampaignParam));
  }
  return {
    'source': source,
    'medium': medium,
    'campaign': campaign,
    'term': term,
    'content': content
  };
}

function __getTrafficSource(__reviveFirstSession) {
  var trafficSources = {};
  if (__reviveFirstSession && __reviveFirstSession === true) {
    trafficSources = __crumbleCookie(__firstSessionCookieName);
  } else {
    trafficSources = __calculateTrafficSource();
  }
  var source = trafficSources.source.length === 0 ? 'direct' : trafficSources.source;
  var medium = trafficSources.medium.length === 0 ? 'none' : trafficSources.medium;
  var campaign = trafficSources.campaign.length === 0 ? 'direct' : trafficSources.campaign;
  // exception
  // if (medium === 'referral') {
  //   campaign = '';
  // }
  var rightNow = new Date();
  return 'source:' + source +
    '$medium:' + medium +
    '$campaign:' + campaign +
    '$term:' + trafficSources.term +
    '$content:' + trafficSources.content +
    '$date:' + rightNow.toISOString().slice(0, 10).replace(/-/g, "");
}

function __getTrafficSourceFromCookies() {
  function isEmpty(obj) {
    if (typeof obj === 'object' && obj !== null) {
      for (var prop in obj) {
        if (obj.hasOwnProperty(prop)) {
          return false;
        }
      }
      return JSON.stringify(obj) === JSON.stringify({});
    } else {
      return true;
    }

  }
  return __crumbleCookie(__returningSessionCookieName) && !isEmpty(__crumbleCookie(__returningSessionCookieName)) ? __crumbleCookie(__returningSessionCookieName) : __crumbleCookie(__firstSessionCookieName);
}

(function () {
  if (__firstSessionCookieName && __firstSessionCookieName.length) {
    var session = __crumbleCookie(__firstSessionCookieName);

    if (typeof session == 'undefined')	// First time session
    {
      // first session
      __writeLogic(__firstSessionCookieName);
    } else {
      if (__reviveFirstSession && __reviveFirstSession === true) {
        // revive first session
        __writeLogic(__firstSessionCookieName, __reviveFirstSession);
      } else {
        // returning session
        if (__returningSessionCookieName && __returningSessionCookieName.length) {
          __writeLogic(__returningSessionCookieName);
        }
      }
    }
  }

})();