{% assign post = page %}

{% if page.related_posts %}
  {% if major >= 4 and minor >= 1 %}
    {% assign related_posts = site.posts | where_exp:"post", "page.related_posts contains post.path or page.related_posts contains post.url" %}
  {% else %}
    {% assign related_posts_1 = site.posts | where_exp:"post", "page.related_posts contains post.path" %}
    {% assign related_posts_2 = site.posts | where_exp:"post", "page.related_posts contains post.url" %}
    {% assign related_posts = related_posts_1 | concat:related_posts_2 %}
  {% endif %}
{% elsif site.pivoine.use_lsi or site.use_lsi %}
  {% assign related_posts = site.related_posts %}
{% elsif post.categories.first %}
  {% assign related_posts = site.categories[post.categories.first] | where_exp:"post", "post.url != page.url" %}
{% elsif post.tags.first %}
  {% assign related_posts = site.tags[post.tags.first] | where_exp:"post", "post.url != page.url" %}
{% else %}
  {% assign related_posts = site.related_posts %}
{% endif %}

{% if related_posts.size > 0 %}
<aside class="related mb4" role="complementary">
  <h2 class="hr-bottom">{{ site.data.strings.related_posts | default:"Related Posts" }}</h2>

  <ul class="related-posts">
    {% for post in related_posts limit:3 %}
      {% if post %}
        {% include_cached components/post-list-item.html post=post %}
      {% else %}
        <li>Post with path <code>{{ post_path }}</code> not found.</li>
      {% endif %}
    {% endfor %}
  </ul>
</aside>
{% endif %}