fix (addon): #1034 Fix event ping to include experiment data only if necessary

content-src/components/LinkMenu/LinkMenu.js

@@ -21,9 +21,11 @@ const LinkMenu = React.createClass({
         page: page,
         source: source,
         action_position: index,
-        url: site.recommended ? site.url : null,
-        recommender_type: site.recommended ? site.recommender_type : null
       };
+      if (site.recommended) {
+        payload.url = site.url;
+        payload.recommender_type = site.recommender_type;
+      }
       dispatch(actions.NotifyEvent(payload));
     }
   },

content-src/components/Spotlight/Spotlight.js

@@ -99,15 +99,18 @@ const Spotlight = React.createClass({
   },
   onClickFactory(index, site) {
     return () => {
-      this.props.dispatch(actions.NotifyEvent({
+      let payload = {
         event: "CLICK",
         page: this.props.page,
         source: "FEATURED",
         action_position: index,
         highlight_type: site.type,
-        url: site.recommended ? site.url : null,
-        recommender_type: site.recommended ? site.recommender_type : null
-      }));
+      };
+      if (site.recommended) {
+        payload.url = site.url;
+        payload.recommender_type = site.recommender_type;
+      }
+      this.props.dispatch(actions.NotifyEvent(payload));
       if (site.recommended) {
         this.props.dispatch(actions.NotifyBlockRecommendation(site.url));
       }

content-test/components/Spotlight.test.js

@@ -42,8 +42,8 @@ describe("Spotlight", function() {
           assert.equal(a.data.source, "FEATURED");
           assert.equal(a.data.action_position, 0);
           assert.equal(a.data.highlight_type, fakeSpotlightItems[0].type);
-          assert.equal(a.data.url, null);
-          assert.equal(a.data.recommender_type, null);
+          assert.equal(a.data.url, undefined);
+          assert.equal(a.data.recommender_type, undefined);
           done();
         }
       }

lib/RecommendationProvider.js

@@ -48,13 +48,14 @@ RecommendationProvider.prototype = {
     * Handle the NEW_RECOMMENDATION event
     */
   _handleNewRecommendationEvent(currentRecommendation) {
-    let url = currentRecommendation ? currentRecommendation.url : null;
-    let recommenderType = currentRecommendation ? currentRecommendation.recommender_type : null;
-    this._tabTracker.handleUserEvent({
-      event: "NEW_RECOMMENDATION",
-      url: url,
-      recommender_type: recommenderType
-    });
+    if (currentRecommendation && currentRecommendation.url &&
+      currentRecommendation.recommender_type) {
+      this._tabTracker.handleUserEvent({
+        event: "NEW_RECOMMENDATION",
+        url: currentRecommendation.url,
+        recommender_type: currentRecommendation.recommender_type
+      });
+    }
   },
 
   /**