snippet.rb

module AddTopNavigation
  module ClassMethods
    def add_top_navigation( opts = {} )
      before_filter opts do |controller|
        controller.send(:add_top_navigation, opts)
      end #before_filter
      
    end
  end
  
  module InstanceMethods
    def add_top_navigation( opts = {} )

      # Top Navigation Ebene 2
      Genre.all(:order => "position").each do |genre|
        add_topnav_level2_item genre.title, genre, :active => :hmmmmm
      end
      
      add_topnav_level2_item( 'navigation.top.account', account_url, :active => :hmmmmm ) if admin_authorized?
      add_topnav_level2_item( 'navigation.top.login', login_url, :active => :hmmmmm ) unless logged_in?
      add_topnav_level2_item( 'navigation.top.logout', logout_url, :active => :hmmmmm ) if logged_in?
      add_topnav_level2_item( 'navigation.top.line_item', '/line_items', :active => :hmmmmm ) 

      # Top Navigation Ebene 3
      # add_topnav_level3_item :all, "topnav_filters.pos01.title", I18n.t('topnav_filters.pos01.url', :root => root_url), :active => 'NIX'
    end
  end
  
  def self.included(receiver)
    receiver.extend         ClassMethods
    receiver.send :include, InstanceMethods
  end
end