FIX: Show muted topics (#19)

In many cases it makes sense to show muted topics in the Knowledge Explorer view. One such case might be if a user mutes a documentation category, but wants to be able to search them via this plugin.

To implement this, I've called TopicQuery.default_results via an added class method, which does the same thing as latest_results except skips the muted topics removal.

One issue I ran into with this is with the no_definitions option set to true, the query was not able to see the categories table. This appears to work correctly in core as I dug into it, but was not able to root out the source of the issue in the plugin. Everything seems to be generated correctly compared to how core methods use TopicQuery, but this issue remained. This is the reason for the results.references(:categories) call on line 25 of query.rb, as then the query can properly access the categories table.

lib/knowledge_explorer/query.rb

@@ -18,9 +18,11 @@ module KnowledgeExplorer
 
     def list
       # query for topics matching selected categories & tags
-      tq = TopicQuery.new(@user)
-      results = tq.latest_results(no_definitions: true, limit: false)
+      opts = { no_definitions: true, limit: false }
+      tq = TopicQuery.new(@user, opts)
+      results = tq.list_knowledge_explorer_topics
       results = results.left_outer_joins(:tags)
+      results = results.references(:categories)
       results = results.where('topics.category_id IN (?)', Query.categories).or(results.where('tags.name IN (?)', Query.tags))
 
       # filter results by selected category

plugin.rb

@@ -34,4 +34,7 @@ after_initialize do
       end
     end
   end
+  add_to_class(:topic_query, :list_knowledge_explorer_topics) do
+    default_results(@options)
+  end
 end