Support likes column via site extension

app/assets/javascripts/discourse/models/topic.js

@@ -95,6 +95,10 @@ Discourse.Topic = Discourse.Model.extend({
     return this.urlForPostNumber(1);
   }.property('url'),
 
+  summaryUrl: function () {
+    return this.urlForPostNumber(1) + (this.get('has_summary') ? "?filter=summary" : "");
+  }.property('url'),
+
   lastPosterUrl: function() {
     return Discourse.getURL("/users/") + this.get("last_poster.username");
   }.property('last_poster'),

app/assets/javascripts/discourse/templates/components/topic-list-header.raw.hbs

@@ -14,5 +14,8 @@
 {{#if showParticipants}}
   {{raw "components/topic-list-header-column" order='participants' name='users'}}
 {{/if}}
+{{#if showLikes}}
+  {{raw "components/topic-list-header-column" sortable=sortable number='true' order='likes' name='likes'}}
+{{/if}}
 {{raw "components/topic-list-header-column" sortable=sortable number='true' order='views' name='views'}}
 {{raw "components/topic-list-header-column" sortable=sortable number='true' order='activity' name='activity'}}

app/assets/javascripts/discourse/templates/components/topic-list.hbs

@@ -6,6 +6,7 @@
         toggleInTitle=toggleInTitle
         hideCategory=hideCategory
         showPosters=showPosters
+        showLikes=showLikes
         showParticipants=showParticipants
         order=order
         ascending=ascending

app/assets/javascripts/discourse/templates/list/topic_list_item.raw.hbs

@@ -29,6 +29,15 @@
   {{raw "list/posters-column" posters=topic.participants}}
 {{/if}}
 
+{{#if controller.showLikes}}
+<td class="num likes">
+  {{#if hasLikes}}
+  <a href='{{topic.summaryUrl}}'>
+    {{number topic.like_count}} <i class='fa fa-heart'></i></td>
+  </a>
+  {{/if}}
+{{/if}}
+
 <td class="num views {{topic.viewsHeat}}">{{number topic.views numberKey="views_long"}}</td>
 
 {{raw "list/activity-column" topic=topic class="num" tagName="td"}}

app/assets/javascripts/discourse/views/topic-list-item.js.es6

@@ -14,6 +14,10 @@ export default Discourse.View.extend(StringBuffer, {
 
   topic: Em.computed.alias("content"),
 
+  hasLikes: function(){
+    return this.get('topic.like_count') > 0;
+  },
+
   click: function(e){
     var target = $(e.target);