Localized buy-online link localization

variant_helper.rb

require 'dynamo/country'
require 'aldo/online_store_locale'

module VariantsHelper
  def where_to_buy(variant)
    content_tag(:ul) do
      list_items  = []
      if tag = buy_online_tag(variant)
        list_items << content_tag(:li, tag, :class => t(:'.buy_online').parameterize)
        list_items << content_tag(:li) { link_to t(:'.find_a_store'), locations_path }
        list_items << content_tag(:li, t(:'.availability_notice'), :class => :'availability-notice') if outside_availability_zones?
      else
        list_items << content_tag(:li, t(:'.only_available_in', :countries => variant_countries(variant).to_sentence))
      end
      list_items.join.html_safe
    end
  end

  def buy_online_tag(variant)
    url = location_aware_store_url(variant)
    link_to(t(:'.buy_online'), url, :target => :blank) if url
  end

  def location_aware_store_url(variant)
    locale = outside_availability_zones? ? :US : look_up_store_locale
    variant.link_for(locale.downcase)
  end

  private

  def variant_countries(variant)
    variant.find_available_countries.collect { |c| t(:"countries.#{c}") }
  end

  def look_up_country_code
    session[:country_code] ||= Dynamo::Country.find(request.ip).code
  end
  
  def outside_availability_zones?
    look_up_country_code == Dynamo::Country.default.code
  end
end