add breadcrumb schema to base template

Author: JakubMastalerz

tbx/project_styleguide/templates/patterns/base.html

@@ -29,6 +29,8 @@
 
         {% block meta_tags %}{% endblock %}
 
+        {% include "patterns/navigation/components/breadcrumbs-jsonld.html" %}
+
         {% block extra_jsonld %}{% endblock %}
 
         <link rel="stylesheet" type="text/css" href="{% static 'css/main.css' %}">

tbx/project_styleguide/templates/patterns/navigation/components/breadcrumbs-jsonld.html

@@ -0,0 +1,18 @@
+{% load wagtailcore_tags %}
+{% wagtail_site as current_site %}
+{% if page.breadcrumbs %}
+    <script type="application/ld+json">
+        {
+            "@context": "https://schema.org/",
+            "@type": "BreadcrumbList",
+            "itemListElement": [{% for crumb in page.breadcrumbs %}
+                {
+                    "@type": "ListItem",
+                    "position": {{ forloop.counter }},
+                    "name": "{% if crumb.depth == 2 %}Home{% else %}{{ crumb.title|escapejs }}{% endif %}",
+                    "item": "{{ current_site.root_url }}{% pageurl crumb %}"
+                }{% if not forloop.last %},{% endif %}{% endfor %}
+            ]
+        }
+    </script>
+{% endif %}