{% comment %}
 # -----------------------------------------------------------------------------
 #   ~/_includes/themes/j1/procedures/posts/collate_simple.proc
 #  Liquid PROCEDURE to collate posts as a simple list ordered
 #  by year and month.
 #
 #  http://jekyll.one
 #
 #  Copyright (C) 2023, 2024 Juergen Adams
 #
 #  J1 Template is licensed under the MIT License.
 #  See: https://github.com/jekyll-one-org/j1-template/blob/main/LICENSE
 #
 # -----------------------------------------------------------------------------
 #  NOTE:
 #
 #  Collate posts procedure. Collate posts as a simple list ordered
 #  by year and month.
 #
 #    Usage:
 #
 #        1) assign the 'posts_collate' variable to a valid array of posts
 #        2) include the 'collate_simple' procedure
 #
 #    Example:
 #
 #        {% assign posts_collate = site.posts %}
 #        {% include themes/{{site.template.name}}/procedures/posts/collate_simple.proc items=posts_collate %}
 #
 #    Ordering:
 #        Posts are displayed in reverse chronological order.
 #        For normal chronological order:
 #
 #           1) Change the for loop to this:
 #               => 'for post in posts_collate reversed'
 #           2) Next make sure to change 'post.previous.date' to:
 #               => 'post.next.date'
 #
 # -----------------------------------------------------------------------------
 # Test data:
 #  liquid_var:  {{ liquid_var | debug }}
 #
 # -----------------------------------------------------------------------------
{% endcomment %}


{% comment %} Variables
   ----------------------------------------------------------------------------- {% endcomment %}
{% assign posts_collate = include.items %}

{% comment %} Liquid procedures
   ----------------------------------------------------------------------------- {% endcomment %

{% comment %} Main
   ----------------------------------------------------------------------------- {% endcomment %}

  {% if site.data.j1_config.posts_collate.provider == 'custom' %}
    <!-- Use custom collator -->
    {% include themes/{{site.template.name}}/procedures/custom/collate_simple %}
  {% else %}
    {% for post in posts_collate  %}

      {% capture this_year %}{{ post.date | date: "%Y" }}{% endcapture %}
      {% capture this_month %}{{ post.date | date: "%B" }}{% endcapture %}
      {% capture next_year %}{{ post.previous.date | date: "%Y" }}{% endcapture %}
      {% capture next_month %}{{ post.previous.date | date: "%B" }}{% endcapture %}

      {% if forloop.first %}
          <h2 id="{{ 100000 | rand }}">{{this_year}}</h2>
          <h3 id="{{ 100000 | rand }}">{{this_month}}</h3>
          <ul>
      {% endif %}

      <div>  <a href="{{ post.url }}"><h4 id="{{ 100000 | rand }}">{{ post.date | date: "%B %e, %Y" }} &raquo; {{ post.title }} </h4></a></div>

      {% if forloop.last %}
          </ul>
      {% else %}
          {% if this_year != next_year %}
              </ul>
              <h2 id="{{ 100000 | rand }}">{{next_year}}</h2>
              <h3 id="{{ 100000 | rand }}">{{next_month}}</h3>
              <ul>
          {% else %}
              {% if this_month != next_month %}
                  </ul>
                  <h3 id="{{ 100000 | rand }}">{{next_month}}</h3>
                  <ul>
              {% endif %}
          {% endif %}
      {% endif %}
    {% endfor %}
  {% endif %}

  <!-- Reset procedure variable -->
  {% assign posts_collate = nil %}