Move note helper method to notes entity file

lib/api/helpers.rb

@@ -397,9 +397,5 @@ module API
       error!(errors[:access_level], 422) if errors[:access_level].any?
       not_found!(errors)
     end
-
-    def noteable_ability_name(noteable)
-      "read_#{noteable.class.to_s.underscore.downcase}".to_sym
-    end
   end
 end

lib/api/notes.rb

@@ -21,7 +21,7 @@ module API
         get ":id/#{noteables_str}/:#{noteable_id_str}/notes" do
           @noteable = user_project.send(noteables_str.to_sym).find(params[noteable_id_str.to_sym])
-          if can?(current_user, noteable_ability_name(@noteable), @noteable)
+          if can?(current_user, noteable_read_ability_name(@noteable), @noteable)
             # We exclude notes that are cross-references and that cannot be viewed
             # by the current user. By doing this exclusion at this level and not
             # at the DB query level (which we cannot in that case), the current
@@ -51,7 +51,7 @@ module API
         get ":id/#{noteables_str}/:#{noteable_id_str}/notes/:note_id" do
           @noteable = user_project.send(noteables_str.to_sym).find(params[noteable_id_str.to_sym])
           @note = @noteable.notes.find(params[:note_id])
-          can_read_note = can?(current_user, noteable_ability_name(@noteable), @noteable) && !@note.cross_reference_not_visible_for?(current_user)
+          can_read_note = can?(current_user, noteable_read_ability_name(@noteable), @noteable) && !@note.cross_reference_not_visible_for?(current_user)
           if can_read_note
             present @note, with: Entities::Note
@@ -141,5 +141,11 @@ module API
         end
       end
     end
+
+    helpers do
+      def noteable_read_ability_name(noteable)
+        "read_#{noteable.class.to_s.underscore.downcase}".to_sym
+      end
+    end
   end
 end