FIX: youtube preview video title link doesn't work

app/assets/javascripts/discourse/lib/click-track.js.es6

@@ -1,23 +1,10 @@
-/**
-  Used for tracking when the user clicks on a link
+export default {
+  trackClick(e) {
+    // cancel click if triggered as part of selection.
+    if (Discourse.Utilities.selectedText() !== "") { return false; }
 
-  @class ClickTrack
-  @namespace Discourse
-  @module Discourse
-**/
-
-Discourse.ClickTrack = {
-
-  /**
-    Track a click on a link
-
-    @method trackClick
-    @param {jQuery.Event} e The click event that occurred
-  **/
-  trackClick: function(e) {
-    if (Discourse.Utilities.selectedText()!=="") return false;  //cancle click if triggered as part of selection.
     var $link = $(e.currentTarget);
-    if ($link.hasClass('lightbox')) return true;
+    if ($link.hasClass('lightbox')) { return true; }
 
     var href = $link.attr('href') || $link.data('href'),
         $article = $link.closest('article'),
@@ -25,9 +12,7 @@ Discourse.ClickTrack = {
         topicId = $('#topic').data('topic-id'),
         userId = $link.data('user-id');
 
-    if (!href || href.trim().length === 0){
-      return;
-    }
+    if (!href || href.trim().length === 0) { return; }
 
     if (!userId) userId = $article.data('user-id');
 

app/assets/javascripts/discourse/views/topic.js.es6

@@ -1,5 +1,6 @@
 import AddCategoryClass from 'discourse/mixins/add-category-class';
 import AddArchetypeClass from 'discourse/mixins/add-archetype-class';
+import ClickTrack from 'discourse/lib/click-track';
 import { listenForViewEvent } from 'discourse/lib/app-events';
 import { categoryBadgeHTML } from 'discourse/helpers/category-link';
 
@@ -55,7 +56,7 @@ var TopicView = Discourse.View.extend(AddCategoryClass, AddArchetypeClass, Disco
       var $target = $(e.target);
       if ($target.hasClass('mention') || $target.parents('.expanded-embed').length) { return false; }
 
-      return Discourse.ClickTrack.trackClick(e);
+      return ClickTrack.trackClick(e);
     });
 
   }.on('didInsertElement'),

app/models/topic_link_click.rb

@@ -52,7 +52,7 @@ class TopicLinkClick < ActiveRecord::Base
       # If we have it somewhere else on the site, just allow the redirect.
       # This is likely due to a onebox of another topic.
       link = TopicLink.find_by(url: url)
-      return link.present? ? link.url : nil
+      return link.present? ? link.url : url
     end
 
     return url if args[:user_id] && link.user_id == args[:user_id]

spec/models/directory_item_spec.rb

@@ -8,7 +8,7 @@ describe DirectoryItem do
       DirectoryItem.refresh!
       expect(DirectoryItem.where(period_type: DirectoryItem.period_types[:all])
                           .where(user_id: post.user.id)
-                          .exists?).to be_true
+                          .exists?).to be_truthy
     end
 
   end

spec/models/topic_link_click_spec.rb

@@ -47,8 +47,8 @@ describe TopicLinkClick do
       context 'without a url' do
         let(:click) { TopicLinkClick.create_from(url: "url that doesn't exist", post_id: @post.id, ip: '127.0.0.1') }
 
-        it "returns nil" do
-          expect(click).to eq(nil)
+        it "returns the url" do
+          expect(click).to eq("url that doesn't exist")
         end
       end
 

test/javascripts/lib/click-track-test.js.es6

@@ -1,8 +1,10 @@
+import ClickTrack from "discourse/lib/click-track";
+
 var windowOpen,
     win,
     redirectTo;
 
-module("Discourse.ClickTrack", {
+module("ClickTrack", {
   setup: function() {
 
     // Prevent any of these tests from navigating away
@@ -30,7 +32,7 @@ module("Discourse.ClickTrack", {
   }
 });
 
-var track = Discourse.ClickTrack.trackClick;
+var track = ClickTrack.trackClick;
 
 // test
 var generateClickEventOn = function(selector) {