class DynamicExtension < Radiant::Extension
  version "0.2.0"
  description "With this extension you can create a page of Dynamic type that will be updated every time that one of its children will be saved."
  url "http://gravityblast.com/projects/radiant-page-utilities/"
  
  def activate
    DynamicPage
    Page.class_eval %{
      before_save :clear_dynamic_ancestors_cache
      before_destroy :clear_dynamic_ancestors_cache

      def clear_dynamic_ancestors_cache
        cache = ResponseCache.instance
        self.ancestors.each do |ancestor|
          cache.expire_response(ancestor.url) if ancestor.class_name == 'DynamicPage'
        end   
      end
    }
  end
  
  def deactivate  
  end
  
end