Extract concern to share hidden content code

app/controllers/concerns/admin/hidden_content.rb

@@ -0,0 +1,11 @@
+module Admin::HiddenContent
+  extend ActiveSupport::Concern
+
+  included do
+    has_filters %w[without_confirmed_hide all with_confirmed_hide], only: :index
+  end
+
+  def hidden_content(relation)
+    relation.only_hidden.send(@current_filter).order(hidden_at: :desc).page(params[:page])
+  end
+end