Use JSON-LD link if found in HTML template

Author: webb-ben

pygeoapi/templates/_base.html

@@ -80,22 +80,22 @@
         <a href="{{ config['server']['url'] }}">{% trans %}Home{% endtrans %}</a>
         {% endblock %}
         <span style="float: inline-end">
-          {% set links_found = namespace(json=0, jsonld=0) %}
+          {% set links_found = namespace(json='', jsonld='') %}
 
           {% for link in data['links'] %}
           {% if link['rel'] == 'alternate' and link['type'] and link['type'] in ['application/json', 'application/geo+json', 'application/prs.coverage+json'] %}
-          {% set links_found.json = 1 %}
+          {% set links_found.json = link.href | string | safe %}
           <a href="{{ link['href'] }}">{% trans %}json{% endtrans %}</a>
           {% elif link['rel'] == 'alternate' and link['type'] and link['type'] == 'application/ld+json' %}
-          {% set links_found.jsonld = 1 %}
+          {% set links_found.jsonld = link.href | string | safe %}
           <a href="{{ link['href'] }}">{% trans %}jsonld{% endtrans %}</a>
           {% endif %}
           {% endfor %}
 
-          {% if links_found.json == 0 %}
+          {% if links_found.json == '' %}
           <a href="?f=json">{% trans %}json{% endtrans %}</a>
           {% endif %}
-          {% if links_found.jsonld == 0 %}
+          {% if links_found.jsonld == '' %}
           <a href="?f=jsonld">{% trans %}jsonld{% endtrans %}</a>
           {% endif %}
 
@@ -127,7 +127,11 @@
     <script>
       // Requests and embeds JSON-LD representation of current page
       var xhr = new XMLHttpRequest();
+      {% if links_found.jsonld == '' -%}
       var path = window.location.protocol + "//" + window.location.host + window.location.pathname + "?f=jsonld";
+      {%- else -%}
+      var path = "{{ links_found.jsonld }}";
+      {%- endif %}
       xhr.open('GET', path);
       xhr.onload = function() {
         if (xhr.status === 200) {