Fix Roots Nav menu walker to add active class to custom post types

nav_custom_post_type_highlight.php

/**
 * Fix wp_nav_menu's active item highlighting with custom post types
 */
function roots_cpt_active_menu($menu) {
  $post_type = get_post_type();

  switch($post_type) {
    case 'post':
      $menu = str_replace('active', '', $menu);
      $menu = str_replace('menu-news', 'menu-news active', $menu);
      break;
    case 'product':
      $menu = str_replace('active', '', $menu);
      $menu = str_replace('menu-products', 'menu-products active', $menu);
      break;
    case 'accsesories':
      $menu = str_replace('active', '', $menu);
      $menu = str_replace('menu-accessories', 'menu-accessories active', $menu);
      break;
    case 'marketing':
      $menu = str_replace('active', '', $menu);
      $menu = str_replace('menu-marketing-collateral', 'menu-marketing-collateral active', $menu);
      break;
    case 'partners':
      $menu = str_replace('active', '', $menu);
      $menu = str_replace('menu-partner-directory', 'menu-partner-directory active', $menu);
      break;

  }

  if (is_author()) {
    $menu = str_replace('active', '', $menu);
  }
 /* if (is_singular('post')) {
    $menu = str_replace('menu-blog', 'menu-blog active', $menu);
  }*/
  return $menu;
}
add_filter('nav_menu_css_class', 'roots_cpt_active_menu', 400);