specify timezone in configuration (closes foodcoops#282)

app/controllers/application_controller.rb

@@ -6,6 +6,7 @@ class ApplicationController < ActionController::Base
   protect_from_forgery
   before_filter  :select_foodcoop, :authenticate, :store_controller, :items_per_page
   after_filter  :remove_controller
+  around_filter :set_time_zone
 
   
   # Returns the controller handling the current request.
@@ -167,5 +168,16 @@ class ApplicationController < ActionController::Base
   def default_url_options(options = {})
     {foodcoop: FoodsoftConfig.scope}
   end
-  
+
+  # Set timezone according to foodcoop preference.
+  # @see http://stackoverflow.com/questions/4362663/timezone-with-rails-3
+  # @see http://archives.ryandaigle.com/articles/2008/1/25/what-s-new-in-edge-rails-easier-timezones
+  def set_time_zone
+    old_time_zone = Time.zone
+    Time.zone = FoodsoftConfig[:time_zone] if FoodsoftConfig[:time_zone]
+    yield
+  ensure
+    Time.zone = old_time_zone
+  end
+
 end

app/helpers/admin/configs_helper.rb

@@ -7,6 +7,7 @@ module Admin::ConfigsHelper
   # @param options [Hash] Options passed to the form builder.
   # @option options [Boolean] :required Wether field is shown as required (default not).
   # @return [String] Form input for configuration key.
+  # @todo find way to pass current value to time_zone input without using default
   def config_input(form, key, options = {}, &block)
     return unless @cfg.allowed_key? key
     options[:label] = config_input_label(form, key)
@@ -21,6 +22,9 @@ module Admin::ConfigsHelper
     elsif options[:collection] or options[:as] == :select
       options[:selected] = options[:input_html].delete(:value)
       return form.input key, options, &block
+    elsif options[:as] == :time_zone
+      options[:default] = options[:input_html].delete(:value)
+      return form.input key, options, &block
     end
     form.input key, options, &block
   end

app/views/admin/configs/_tab_language.html.haml

@@ -1,3 +1,4 @@
 = config_input form, :default_locale,
                collection: I18n.available_locales.map {|l| [t("simple_form.options.settings.profile.language.#{l}"), l]}
 = config_input form, :ignore_browser_locale, as: :boolean
+= config_input form, :time_zone, as: :time_zone, include_blank: true, input_html: {class: 'input-xlarge'}