{% macro menu_items(key="") %}
{% for page in pages | get(key=key, default=pages) | unzip | filter(attribute="1.order") | sort(attribute="1.order") %}
  {% set parent = key %}
  {% set key = page.0 %}
  {% set value = page.1 %}
  {% if value.type and value.type == "page" %}
    <li><a href="{{value.path}}">{{value.title}}</a></li>
  {% elif value.type and value.type == "category" %}
    {% set next = [parent, key] | join(sep=".") | trim_start_matches(pat=".") %}
    </menu>
    <details open>
      <summary>
        {{value.title}}
      </summary>
      <menu class="menu-item-list">
        {{ self::menu_items(key=next) }}
      </menu>
    </details>
    <menu class="menu-item-list">
  {% endif %}
{% endfor %}
{% endmacro category %}