{#
/**
 * @file
 * Theme override to display a menu.
 *
 * Available variables:
 * - menu_name: The machine name of the menu.
 * - items: A nested list of menu items. Each menu item contains:
 *   - attributes: HTML attributes for the menu item.
 *   - below: The menu item child items.
 *   - title: The menu link title.
 *   - url: The menu link url, instance of \Drupal\Core\Url
 *   - localized_options: Menu link localized options.
 *   - is_expanded: TRUE if the link has visible children within the current
 *     menu tree.
 *   - is_collapsed: TRUE if the link has children within the current menu tree
 *     that are not currently visible.
 *   - in_active_trail: TRUE if the link is in the active trail.
 */
#}

<div class="navbar {{'menu-' ~ menu_name|clean_class}}">

{% import _self as menus %}

{#
  We call a macro which calls itself to render the full tree.
  @see http://twig.sensiolabs.org/doc/tags/macro.html
#}
{{ menus.menu_links(items, attributes, 0, menu_name|clean_class) }}

{% macro menu_links(items, attributes, menu_level, menu_name) %}
  {% import _self as menus %}

  {% if items %}
    {% if menu_level == 0 %}
      <ul role="navigation"{{ attributes.addClass('nav', 'navbar-nav', menu_name) }}>
    {% else %}
      <ul{{ attributes.addClass('dropdown-menu', menu_name) }}>
    {% endif %}
    {% for item in items %}
      {%
        set is_nolink = false
      %}
      {# Check if URL contains nolink to determine if it's a nolink item #}
      {% if item.url.toString() == '<nolink>' %}
        {% set is_nolink = true %}
      {% endif %}

      {%
        set item_classes = [
          'expanded',
          'dropdown',
          item.in_active_trail ? 'active',
          is_nolink ? 'no-link'
        ]
      %}
      {% if item.is_expanded %}
        <li{{ item.attributes.addClass(item_classes) }}>
          {% if is_nolink %}
            <span class="dropdown-toggle" role="button" tabindex="0" aria-haspopup="true" aria-expanded="false">
              {{ item.title }}
              <span class="caret"></span>
            </span>
          {% else %}
            <a href="{{ item.url }}" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
              {{ item.title }} <span class="caret"></span>
            </a>
          {% endif %}
      {% else %}
        <li>
        {{ link(item.title, item.url) }}
      {% endif %}
      {% if item.below %}
        {{ menus.menu_links(item.below, attributes.removeClass('nav', 'navbar-nav'), menu_level + 1, menu_name) }}
      {% endif %}
      </li>
    {% endfor %}
    </ul>
  {% endif %}
{% endmacro %}

</div>
