{#
/**
 * @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.
 */
#}
{% import _self as menus %}

{#
  We call a macro which calls itself to render the full tree.
  @see https://twig.symfony.com/doc/3.x/tags/macro.html
#}
{{ menus.menu_links(items, attributes, 0) }}

{% macro menu_links(items, attributes, menu_level) %}
  {% import _self as menus %}
  {% if items %}
    {% if menu_level == 0 %}
      <ul{{ attributes.addClass(['nav navbar-nav']) }}>
    {% elseif menu_level == 1 %}
      <ul{{ attributes.addClass(['subnav']).removeClass(['nav navbar-nav']) }}>
    {% else %}
      <ul>
    {% endif %}
    {% for item in items %}
      {%
        set classes = [
          menu_level == 0 ? 'menu-item',
        ]
      %}

      {%
        set classes_link = [
          menu_level ? 'dropdown-item' : 'nav-item',
          item.in_active_trail ? 'active',
        ]
      %}
      <li{{ item.attributes.addClass(classes) }}>
          {% set link_text %}
            {% if item.font_awesome_class or item.menu_icon_image %}
              {% if item.font_awesome_class %}
                <span class="menu-icon">
                  <i class="{{ item.font_awesome_class }}"></i>
                </span>
              {% elseif item.menu_icon_image %}
                {% set image_alt = item.menu_icon_image_alt is defined ? item.menu_icon_image_alt : 'icon' %}
                {% set height = item.menu_icon_image_height is defined ? 'height: ' ~  item.menu_icon_image_height ~  'px;' : '' %}
                <span class="menu-icon-image">
                  <img src="{{ item.menu_icon_image }}" alt="{{ image_alt }}"{% if height is not empty %} style="{{ height }}"{% endif %}/>
                </span>
              {% endif %}
              {% if item.hide_label is not defined %}
                {{ item.title }}
              {% endif %}
            {% else %}
              {{ item.title }}
            {% endif %}
          {% endset %}
        {% if menu_level == 0 and item.is_expanded %}
          <span>{{ item.title }}</span>
          {% if item.below %}
            {{ menus.menu_links(item.below, attributes, menu_level + 1) }}
          {% endif %}
        {% else %}
          {{ link(link_text, item.url, { 'class': classes_link }) }}
          {% if item.below %}
            {{ menus.menu_links(item.below, attributes, menu_level + 1) }}
          {% endif %}
        {% endif %}
      </li>
    {% endfor %}
    </ul>
  {% endif %}
{% endmacro %}
