FEATURE: Add solved icon for topic titles in search results and other topic lists

plugin.rb

@@ -18,6 +18,10 @@ register_asset 'stylesheets/solutions.scss'
 
 after_initialize do
 
+  [
+    '../app/serializers/concerns/topic_answer_mixin.rb'
+  ].each { |path| load File.expand_path(path, __FILE__) }
+
   # we got to do a one time upgrade
   if defined?(UserAction::SOLVED)
     unless $redis.get('solved_already_upgraded')
@@ -479,42 +483,29 @@ SQL
   end
 
   require_dependency 'topic_list_item_serializer'
-  require_dependency 'listable_topic_serializer'
+  require_dependency 'search_topic_list_item_serializer'
+  require_dependency 'suggested_topic_serializer'
+  require_dependency 'category_detailed_serializer'
+  require_dependency 'user_summary_serializer'
 
   class ::TopicListItemSerializer
-    attributes :has_accepted_answer, :can_have_answer
-
-    def has_accepted_answer
-      object.custom_fields["accepted_answer_post_id"] ? true : false
-    end
-
-    def can_have_answer
-      return true if SiteSetting.allow_solved_on_all_topics
-      return false if object.closed || object.archived
-      return scope.allow_accepted_answers_on_category?(object.category_id)
-    end
-
-    def include_can_have_answer?
-      SiteSetting.empty_box_on_unsolved
-    end
+    include TopicAnswerMixin
   end
 
-  class ::ListableTopicSerializer
-    attributes :has_accepted_answer, :can_have_answer
+  class ::SearchTopicListItemSerializer
+    include TopicAnswerMixin
+  end
 
-    def has_accepted_answer
-      object.custom_fields["accepted_answer_post_id"] ? true : false
-    end
+  class ::SuggestedTopicSerializer
+    include TopicAnswerMixin
+  end
 
-    def can_have_answer
-      return true if SiteSetting.allow_solved_on_all_topics
-      return false if object.closed || object.archived
-      return scope.allow_accepted_answers_on_category?(object.category_id)
-    end
+  class ::CategoryDetailedSerializer
+    include TopicAnswerMixin
+  end
 
-    def include_can_have_answer?
-      SiteSetting.empty_box_on_unsolved
-    end
+  class ::UserSummarySerializer::TopicSerializer
+    include TopicAnswerMixin
   end
 
   TopicList.preloaded_custom_fields << "accepted_answer_post_id" if TopicList.respond_to? :preloaded_custom_fields