BUGFIX: muted categories showing up in new via message bus

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

@@ -17,6 +17,13 @@ Discourse.TopicTrackingState = Discourse.Model.extend({
         tracker.incrementMessageCount();
       }
 
+      if (data.message_type === "new_topic"){
+        var ignored_categories = Discourse.User.currentProp("muted_category_ids");
+        if(_.include(ignored_categories, data.payload.category_id)){
+          return;
+        }
+      }
+
       if (data.message_type === "new_topic" || data.message_type === "unread" || data.message_type === "read") {
         tracker.notify(data);
         var old = tracker.states["t" + data.topic_id];

app/models/topic_tracking_state.rb

@@ -26,7 +26,8 @@ class TopicTrackingState
         last_read_post_number: nil,
         highest_post_number: 1,
         created_at: topic.created_at,
-        topic_id: topic.id
+        topic_id: topic.id,
+        category_id: topic.category_id
       }
     }
 

app/serializers/current_user_serializer.rb

@@ -22,7 +22,8 @@ class CurrentUserSerializer < BasicUserSerializer
              :should_be_redirected_to_top,
              :redirected_to_top_reason,
              :disable_jump_reply,
-             :custom_fields
+             :custom_fields,
+             :muted_category_ids
 
   def include_site_flagged_posts_count?
     object.staff?
@@ -93,4 +94,10 @@ class CurrentUserSerializer < BasicUserSerializer
     end
   end
 
+  def muted_category_ids
+    @muted_category_ids ||= CategoryUser.where(user_id: object.id,
+                                               notification_level: TopicUser.notification_levels[:muted])
+                                         .pluck(:category_id)
+  end
+
 end