Contents

module I18nAccessors
=begin

Defines +method_missing+ and +respond_to_missing?+ methods for a set of
attributes such that a method call using a locale accessor, like:

  article.title_pt_br

will return the value of +article.title+ with the locale set to +pt-BR+ around
the method call.

@example Using missing on a plain old ruby class
  class Post
    def title
      "title in #{I18n.locale}"
    end
    include I18nAccessors::Missing.new("title")
  end

  I18n.locale = :en
  post = Post.new
  post.title
  #=> "title in en"
  post.title_fr
  #=> "title in fr"

=end
  class Missing < Module
    # @param [String] One or more attributes
    def initialize(*attributes)
      method_name_regex = /\A(#{attributes.join('|'.freeze)})_([a-z]{2}(_[a-z]{2})?)(=?|\??)\z/.freeze

      define_method :method_missing do |method_name, *arguments, &block|
        if method_name =~ method_name_regex
          attribute = $1.to_sym
          locale, suffix = $2.split('_'.freeze)
          locale = "#{locale}-#{suffix.upcase}".freeze if suffix
          I18nAccessors.i18n_class.with_locale(locale.to_sym) { public_send("#{attribute}#{$4}".freeze, *arguments) }
        else
          super(method_name, *arguments, &block)
        end
      end

      define_method :respond_to_missing? do |method_name, include_private = false|
        (method_name =~ method_name_regex) || super(method_name, include_private)
      end
    end
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
i18n_accessors-1.0.0	lib/i18n_accessors/missing.rb
i18n_accessors-0.1.2	lib/i18n_accessors/missing.rb