Scopes for I18n

i18n_scoped.rb

# = I18n scoped
#
# Set a temporal default scope for I18n
#
# == Synopsis
#
#   Given a locale YAML that looks like this:
#
#     customers:
#       firstname: Customer firstname
#       lastname: Customer lastname
#
#     firstname: Firstname
#     lastname: Lastname
#
#   Then:
#     I18n.scope :customers do
#       puts I18n.t :firstname
#       puts I18n.t :lastname
#     end
#
#   Will result in:
#     Customer firstname
#     Customer lastname
#
#   Where as:
#     puts I18n.t :firstname
#     puts I18n.t :lastname
#
#   Will result in:
#     Firstname
#     Lastname
#   
module I18n
  class << self
    def scope(scope, &block)
      @scope = scope
      yield block
      @scope = nil
    end

    alias_method :scope_less_translate, :translate
    def translate(*args)
      options = {}
      options = args.pop if args.last.is_a? Hash
      
      if @scope and !options[:scope]
        options[:scope] = @scope
      end

      scope_less_translate args, options
    end
  end
end