Update ga tracker

trackers/ga.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const { Maybe, isClientSide } = require('../lib/utils');
+const { Maybe, isClientSide, is } = require('../lib/utils');
 
 // Google Analytics Tracker
 
@@ -18,14 +18,30 @@ module.exports = () => {
 		return GA;
 	})();
 
+	const areAllFieldsOk = (gaFields) => {
+		if(!gaFields || !is('object', gaFields)) {
+			return false;
+		}
+
+		if(!gaFields.metadata) {
+			return false;
+		}
+
+		if(!gaFields.metadata.label && !gaFields.metadata.value) {
+			return false;
+		}
+
+		return true;
+	};
+
 	gaTracker.createEvent = (eventName, eventData) => {
-		if(eventName && eventData) {
+		if(eventName && areAllFieldsOk(eventData)) {
 			ga('send', {
 				hitType: 'event',
 				eventCategory: eventName,
 				eventAction: Maybe(eventData.action),
-				eventLabel: Maybe(eventData.label),
-				eventValue: Maybe(eventData.value)
+				eventLabel: Maybe(eventData.metadata.label),
+				eventValue: Maybe(eventData.metadata.value)
 			});
 		}