{% comment %}
 # -----------------------------------------------------------------------------
 #  ~/_includes/themes/j1/procedures/global/pager.proc
 #  HTML/Liquid procedure to create a paginator for pages of type "post"
 #
 #  Product/Info:
 #  http://jekyll.one
 #
 #  Copyright (C) 2019 Juergen Adams
 #
 #  J1 Template is licensed under the MIT License.
 #  See: https://github.com/jekyll-one-org/j1_template/blob/master/LICENSE
 #
 # -----------------------------------------------------------------------------
 #  NOTE:
 #    This pager reads the "page path" from cookie "cookieUserState". This
 #    data is used to return from a previous (page builder) page.
 # -----------------------------------------------------------------------------
 # Test data:
 #  liquid_var:  {{ liquid_var | debug }}
 #
 # -----------------------------------------------------------------------------
{% endcomment %}


{% comment %} Variables
-------------------------------------------------------------------------------- {% endcomment %}


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


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

  <div class="paginator">
    <ul class="pagination raised-z0">

      {% comment %} Set PREVIOUS page
      -------------------------------------------------------------------------- {% endcomment %}
      {% if page.previous %}
        <li class="page-item"><a class="page-link" href="{{ base_path }}{{ page.previous.url }}" title="{{ page.previous.title }}">Prev</a></li>
      {% else %}
        <li class="page-item disabled"><a class="page-link">Prev</a></li>
      {% endif %}

      {% comment %} Set BACK page (PagerURL)
      -------------------------------------------------------------------------- {% endcomment %}
      <!-- [INFO   ] [j1.posts.pager.proc                   ] [Manage the current pager settings for: {{ builder_path }}] -->
      <script>
        var cookie_names                = j1.getCookieNames();
        const user_state_cookie_name    = cookie_names.user_session;
        var user_state                  = j1.readCookie(user_state_cookie_name);
        var re                          = new RegExp("navigator|dateview|tagview|archive");
        var last_pager                  = user_state.last_pager;
        var last_pager_url;

        <!-- [INFO   ] [j1.page.{{page.title}}                ] [Calculate BackURL from User State Cookie] -->
        if (re.test(last_pager)) {
          last_pager_url = '<li class="page-item"><a class="page-link" href="' + last_pager + '" title="Back to Top Page">Back</a></li>';
        } else {
          last_pager_url = '<li class="page-item disabled"><a class="page-link" title="Back to Top Page">Back</a></li>';
        }  
        document.write( last_pager_url );
        j1.writeCookie({
          name: user_state_cookie_name, 
          data: user_state
        });
      </script>

      {% comment %} Set NEXT page
      -------------------------------------------------------------------------- {% endcomment %}
      {% if page.next %}
        <li class="page-item"><a class="page-link" href="{{ base_path }}{{ page.next.url }}" title="{{ page.next.title }}">Next</a></li>
      {% else %}
        <li class="page-item disabled"><a class="page-link" href="#">Next</a></li>
      {% endif %}

    </ul>
  </div>