Add sitemap support

app/views/sitemap/index.xml.builder

@@ -0,0 +1,28 @@
+xml.instruct!
+
+xml.urlset "xmlns" => "http://www.sitemaps.org/schemas/sitemap/0.9" do
+
+  @locales.each do |locale|
+    ::I18n.locale = locale
+    Page.live.in_menu.includes(:parts).each do |page|
+      page_url = if page.routes.where(:locale => locale).any?
+        page_path = page.routes.where(:locale => locale).first.url
+        [request.protocol, request.host_with_port, "/#{page_path}"].join
+      # exclude sites that are external to our own domain.
+      elsif page.url.is_a?(Hash)
+        # This is how most pages work without being overriden by link_url
+        page.url.merge({:only_path => false})
+      elsif page.url.to_s !~ /^http/
+        # handle relative link_url addresses.
+        [request.protocol, request.host_with_port, page.url].join
+      end
+
+      # Add XML entry only if there is a valid page_url found above.
+      xml.url do
+        xml.loc url_for(page_url)
+        xml.lastmod page.updated_at.to_date
+      end if page_url.present? and page.show_in_menu?
+    end
+  end
+
+end