Ruby on Rails. Class "active" for menu items based on Path or Controller and Action names

application_helper.rb

module ApplicationHelper
  def active_for(options = {})
    name_of_controller = options[:controller] || nil
    name_of_action     = options[:action]     || nil
    request_path       = options[:path]       || nil

    if request_path.nil?
      if (name_of_action.nil? or name_of_action == action_name) and
          name_of_controller == controller_name
        'active'
      else
        ''
      end
    else
      request_path == request.path ? 'active' : ''
    end
  end
end

bootstrap_menu_example.html.erb

<div id="navbar" class="navbar-collapse collapse">
  <ul class="nav navbar-nav navbar-right">
    <li class='<%= active_for(path: "/users/#{current_user.id}") %>'>
      <%= link_to current_user %>
    </li>
    <li class='<%= active_for(controller: "events") %>'>
      <%= link_to events_path %>
    </li>
    <li class='<%= active_for(controller: "users", action: "edit") %>'>
      <%= link_to edit_user_path(current_user) %>
    </li>
  </ul>
</div>