{% 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   ] [procedures.global.pager.proc          ] [Manage the current pager settings for: {{ builder_path }}] -->
    <script>
      var cookie_names           = j1.getCookieNames();
      var 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   ] [procedures.global.pager.proc          ] [Calculate BackURL from User State Cookie for page: {{page.title}}] -->
      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>