Add pluggable analytics framework

analytics.js

@@ -1,8 +1,18 @@
-/**
- * Google Analytics
- */
-(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-             (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
-          })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
-        ga('create', 'UA-319188-14', 'jit.si');
-        ga('send', 'pageview');
+(function (ctx) {
+  function Analytics() {
+    /**
+     * Google Analytics
+     */
+    (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+        (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+    })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
+    ga('create', 'UA-319188-14', 'jit.si');
+    ga('send', 'pageview');
+  }
+
+  Analytics.prototype.sendEvent = function (action, data) {
+    ga('send', 'event', 'jit.si', action);
+  };
+
+  ctx.Analytics = Analytics;
+}(window));

modules/statistics/AnalyticsAdapter.js

@@ -0,0 +1,15 @@
+function NoopAnalytics() {}
+NoopAnalytics.prototype.sendEvent = function () {};
+
+function AnalyticsAdapter() {
+  var AnalyticsImpl = window.Analytics || NoopAnalytics;
+  this.analytics = new AnalyticsImpl();
+}
+
+AnalyticsAdapter.prototype.sendEvent = function (action, data) {
+  try {
+    this.analytics.sendEvent.apply(this.analytics, arguments);
+  } catch (ignored) {}
+};
+
+module.exports = new AnalyticsAdapter();