Refinery::Pages::Url

page.rb

# app/models/refinery/page.rb

# ... code ...

def url
  @url ||= Refinery::Pages::Url.build(self)
end

def uncached_nested_url
  [parent.try(:uncached_nested_url), to_param.to_s].compact.flatten
end

# Returns an array with all ancestors to_param, allow with its own
# Ex: with an About page and a Mission underneath,
# ::Refinery::Page.find('mission').nested_url would return:
#
#   ['about', 'mission']
#
alias_method :nested_url, :uncached_nested_url

# Returns the string version of nested_url, i.e., the path that should be generated
# by the router
def nested_path
  ['', nested_url].join('/')
end

# ... code ...

url.rb

# lib/refinery/pages/url.rb

module Refinery
  module Pages
    class Url

      class Localised < Url
        def self.handle?(page)
          page.link_url.present?
        end

        def url
          current_url = page.link_url

          if current_url =~ %r{^/} &&
            Refinery::I18n.current_frontend_locale != Refinery::I18n.default_frontend_locale
            current_url = "/#{Refinery::I18n.current_frontend_locale}#{current_url}"
          end

          current_url
        end
      end

      class Marketable < Url
        def self.handle?(page)
          Refinery::Pages.marketable_urls
        end

        def url
          url_hash = base_url_hash.merge(:path => page.nested_url, :id => nil)
          with_locale_param(url_hash)
        end
      end

      class Normal < Url
        def self.handle?(page)
          page.to_param.present?
        end

        def url
          url_hash = base_url_hash.merge(:path => nil, :id => page.to_param)
          with_locale_param(url_hash)
        end
      end

      def self.build(page)
        klass = [ Localised, Marketable, Normal ].detect { |d| d.handle?(page) } || self
        klass.new(page).url
      end

      def initialize(page)
        @page = page
      end

      def url
        raise NotImplementedError
      end

      private

      attr_reader :page

      def with_locale_param(url_hash)
        if (locale = Refinery::I18n.current_frontend_locale) != ::I18n.locale
          url_hash.update :locale => locale if locale
        end
        url_hash
      end

      def base_url_hash
        { :controller => '/refinery/pages', :action => 'show', :only_path => true }
      end

    end
  end
end