Social Share Tracking With GA

social.js

// Track Facebook Likes
var fbCallback = function() {
  FB.Event.subscribe('edge.create', function(targetUrl) {
    ga('send', 'social', 'facebook', 'like', targetUrl);
  });
}
if( window.fbAsyncInit ) {
  fbCallback();
} else {
  window.fbAsyncInit = fbCallback;
}

/* Track Social Sharing */
var socialShareUrls = {
  "facebook" : {
    "url" : "facebook.com/sharer/sharer.php",
    "verb" : "share",
    "captureQ" : "u"
  },
  "twitter"  : {
    "url" : "twitter.com/intent/tweet",
    "verb" : "retweet",
    "captureQ" : "url"
  },
  "pinterest": {
    "url" : "pinterest.com/pin/create/bookmarklet",
    "verb" : "pin",
    "captureQ" : "url"
  },
  "linkedin" : {
    "url" : "linkedin.com/shareArticle",
    "verb" : "share",
    "captureQ" : "url"
  },
  "buffer" : {
    "url" : "buffer.com/add",
    "verb" : "add",
    "captureQ" : "url"
  },
  "digg" : {
    "url" : "digg.com/submit",
    "verb" : "submit",
    "captureQ" : "url"
  },
  "tumblr" : {
    "url" : "tumblr.com/widgets/share/tool",
    "verb" : "share",
    "captureQ" : "url"
  },
  "reddit" : {
    "url" : "reddit.com/submit",
    "verb" : "submit",
    "captureQ" : "url"
  },
  "stumbleUpon" : {
    "url" : "stumbleupon.com/submit",
    "verb" : "submit",
    "captureQ" : "url"
  }
}

// Track each link if it matches social share url
var trackSocial = function( link ) {
  for( socialSite in socialShareUrls ) {

    var socialSiteData = socialShareUrls[socialSite];
    if( link.indexOf( socialSiteData.url ) !== -1 ) {
      var match = link.match( socialSiteData.captureQ + "=(http.*?(&|$))" );
      ga('send', 'social', socialSite, socialSiteData.verb, match[1]);
    }

  }

};

function findParent(tagname,el) {
  if ((el.nodeName || el.tagName).toLowerCase()===tagname.toLowerCase()){
    return el;
  }
  while (el = el.parentNode){
    if ((el.nodeName || el.tagName).toLowerCase()===tagname.toLowerCase()){
      return el;
    }
  }
  return null;
}

document.addEventListener('click', function(e){
  // Find the nearest link where click originated.
  // which contains sharer's URL
  var parentLink = findParent("a", e.target);

  if( parentLink.href ) {
    trackSocial( parentLink.href );
  }
});

// Take ownership of window.open to capture plugins which use it.
var oldWindowOpen = window.open;
window.open = function(){
  trackSocial(arguments[0]);
  oldWindowOpen.apply(this, arguments);
};