adds i18n support to routes and application controller; default_locale is set to :en

lib/foodsoft/controller_extensions.rb

@@ -0,0 +1,52 @@
+# -*- encoding : utf-8 -*-
+module Foodsoft
+  module ControllerExtensions
+    module Locale
+      extend ActiveSupport::Concern
+
+      included do
+        before_filter :set_locale
+      end
+
+      module InstanceMethods
+        def explicitly_requested_language
+          params[:locale]
+        end
+
+        def session_language
+          session[:locale]
+        end
+
+        def browser_language
+          request.env['HTTP_ACCEPT_LANGUAGE'] ? request.env['HTTP_ACCEPT_LANGUAGE'].scan(/^[a-z]{2}/).first : nil
+        end
+
+        def default_language
+          ::I18n.default_locale
+        end
+
+        protected
+
+        def select_language_according_to_priority
+          explicitly_requested_language || session_language || browser_language
+        end
+
+        def available_locales
+          ::I18n.available_locales
+        end
+
+        def set_locale
+          if available_locales.include?(select_language_according_to_priority)
+            ::I18n.locale = select_language_according_to_priority
+          else
+            ::I18n.locale = default_language
+          end
+          
+          locale = session[:locale] = ::I18n.locale
+          logger.info("Set locale to #{locale}")
+        end
+      end
+
+    end
+  end
+end