allow to configure currency (closes foodcoops#258)

app/controllers/application_controller.rb

@@ -6,7 +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
+  around_filter :set_time_zone, :set_currency
 
   
   # Returns the controller handling the current request.
@@ -180,4 +180,16 @@ class ApplicationController < ActionController::Base
     Time.zone = old_time_zone
   end
 
+  # Set currency according to foodcoop preference.
+  # @see #set_time_zone
+  def set_currency
+    old_currency = ::I18n.t('number.currency.format.unit')
+    new_currency = FoodsoftConfig[:currency_unit] || ''
+    new_currency += "\u202f" if FoodsoftConfig[:currency_space]
+    ::I18n.backend.store_translations(::I18n.locale, number: {currency: {format: {unit: new_currency}}})
+    yield
+  ensure
+    ::I18n.backend.store_translations(::I18n.locale, number: {currency: {format: {unit: old_currency}}})
+  end
+
 end

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

@@ -2,3 +2,8 @@
                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'}
+= config_input form, :currency_unit do
+  = config_input_field form, :currency_unit, class: 'input-mini'
+  %label.inline
+    = config_input_label form, :currency_space
+    = config_input_field form, :currency_space, as: :boolean

config/app_config.yml.SAMPLE

@@ -39,6 +39,9 @@ default: &defaults
   #ignore_browser_locale: false
   # Default timezone, e.g. UTC, Amsterdam, Berlin, etc.
   #time_zone: Berlin
+  # Currency symbol, and whether to add a whitespace after the unit.
+  #currency_unit: €
+  #currency_space: true
 
   # price markup in percent
   price_markup: 2.0

config/initializers/currency_display.rb

@@ -0,0 +1,7 @@
+# remove all currency translations, so that we can set the default language and
+# have it shown in all other languages too
+::I18n.available_locales.each do |locale|
+  unless locale == ::I18n.default_locale
+    ::I18n.backend.store_translations(locale, number: {currency: {format: {unit: nil}}})
+  end
+end

config/locales/en.yml

@@ -450,6 +450,8 @@ en:
       contact:
         email: General contact email address, shown on website as well as some forms.
         street: Address, typically this will be your delivery and pick-up location.
+      currency_unit: Currency symbol for displaying prices.
+      currency_space: Whether to add whitespace after the currency symbol.
       homepage: Website of your foodcoop.
       help_url: Documentation website.
       applepear_url: Website where the apple and pear system for tasks is explained.
@@ -481,6 +483,8 @@ en:
         country: Country
         email: Email
         phone: Phone
+      currency_unit: Currency
+      currency_space: add space
       homepage: Homepage
       help_url: Documentation URL
       applepear_url: Apple system URL

lib/foodsoft_config.rb

@@ -235,6 +235,8 @@ class FoodsoftConfig
         use_apple_points: true,
         # English is the default language, and this makes it show up as default.
         default_locale: 'en',
+        currency_unit: '€',
+        currency_space: true,
         foodsoft_url: 'https://github.com/foodcoops/foodsoft',
         # The following keys cannot, by default, be set by foodcoops themselves.
         protected: {