Added User ID tracking to the Google Analytics MasterPageTracker

Author: Rvthof

src/GoogleAnalytics/MasterPageTracker.xml

@@ -33,6 +33,19 @@
             <caption>Active</caption>
             <category>Behavior</category>
             <description>Enable/disable tracking</description>
+        </property>
+		<property key="useridAttr" type="attribute" required="false" allowNonPersistableEntities="true" isPath="optional" pathType="reference">
+            <caption>User ID attribute</caption>
+            <category>Data source</category>
+            <description>The value of this attribute will be used to uniquely identify the user in your Google Analytics.</description>
+            <attributeTypes>
+                <attributeType name="String" />
+            </attributeTypes>
+        </property>
+		<property key="userIdDimension" type="integer" defaultValue="0">
+            <caption>User ID dimension</caption>
+            <category>Data source</category>
+            <description>This value will be used to map the user to a custom dimension in your Google Analytics.</description>
         </property>
         <property key="attributeList" type="object" isList="true" required="false">
             <caption>Attributes</caption>

src/GoogleAnalytics/widget/MasterPageTracker.js

@@ -26,11 +26,6 @@ define("GoogleAnalytics/widget/MasterPageTracker", [
     // Declare widget"s prototype.
     return declare("GoogleAnalytics.widget.MasterPageTracker", [_WidgetBase], {
 
-        // Parameters configured in the Modeler.
-        mfToExecute: "",
-        messageString: "",
-        backgroundColor: "",
-
         // Internal variables. Non-primitives created in the prototype are shared between all widget instances.
         _handles: null,
         _contextObj: null,
@@ -107,7 +102,21 @@ define("GoogleAnalytics/widget/MasterPageTracker", [
 
             if (typeof window.mxGoogleAnalytics === "undefined") {
                 this._replaceTags(this.uaTrackCode, lang.hitch(this, function (text) {
-                    ga('create', text, 'auto');
+					var opts = { 'cookieDomain': 'auto' };
+					
+					if (this.useridAttr != '') {
+						var uid = this._contextObj.get(this.useridAttr);
+						opts.userId = uid;
+						ga('create', text, opts);
+						ga('set', '&uid', uid);
+						
+						if (this.userIdDimension > 0)
+							ga('set', 'dimension'+this.userIdDimension, uid);
+						
+					} else {
+						ga('create', text, opts);
+					}
+					
                 }));
             }
         },