gistfile1.txt

module TranslationHelper
  # foo = ActionView::Base.new.extend TranslationHelper
  
  # TODO: If translation is missing 
  #         get a translation from google
  #         and then add it to database, marked as dirty (how?) 
  def translate(key, options = {})
    key = scope_key_by_partial(key)
    options[:raise] = true
    options[:request_locale] = options.has_key?(:locale) ? options[:locale] : I18n.locale  
    
    options[:span_class] ='translation_missing'
    for fallback in I18n_fallbacks[options[:request_locale]]
      begin
        result = I18n.translate( key, options.merge(:locale=>fallback) )
      rescue I18n::MissingTranslationData
      end
      return translation_tag(result,fallback,key,options) unless result.nil?
    end
    options[:span_class] ='translation_absent'
    translation = I18n.normalize_keys(options[:request_locale], key, options[:scope]).join(': ')
    translation_tag(translation,key,nil,options)
  end
  alias :t :translate
  
  private
  def translation_tag(result, locale, key, options)
    show_span = options.has_key?(:span) ? options[:span] : true
    request_locale = options[:request_locale]
    if request_locale.to_s.starts_with?(locale.to_s)
      return result
    else
      keys = I18n.normalize_keys(request_locale, key, options[:scope])
      return show_span ? content_tag('span', result, 
                                     :class => options[:span_class],
                                     :'data-key' => keys.join(', '))  : result
    end
  end
  
end