module Breadcrumbable
  extend ActiveSupport::Concern

  included do
    helper_method :breadcrumbs
  end

  private
    # Render-time helper so I18n.locale (set by Localize's around_action) is
    # already in effect when the breadcrumb labels are translated.
    # Controllers can still override by assigning @breadcrumbs in their action.
    def breadcrumbs
      @breadcrumbs || default_breadcrumbs
    end

    def default_breadcrumbs
      [
        [ I18n.t("breadcrumbs.home"), root_path ],
        [ I18n.t("breadcrumbs.#{controller_name}", default: controller_name.titleize), nil ]
      ]
    end
end