Move "segmented" group links into template macro

tildes/tildes/templates/macros/groups.jinja2

@@ -30,3 +30,16 @@
     {% endif %}
   </div>
 {% endmacro %}
+
+{% macro group_segmented_link(group, class=None) -%}
+  {# Split the link out for each "segment" of the group path #}
+  <a href="/~{{ group.path[0:1] }}"
+    {% if class %}class="{{ class }}"{% endif %}
+  >~{{ group.path[0:1] }}</a>
+  {% for i in range(1, group.path|length) %}
+    .
+    <a href="/~{{ group.path[0:i+1] }}"
+      {% if class %}class="{{ class }}"{% endif %}
+    >{{ group.path[i:i+1] }}</a>
+  {% endfor %}
+{%- endmacro %}

tildes/tildes/templates/topic.jinja2

@@ -7,6 +7,7 @@
 {% from 'macros/comments.jinja2' import comment_label_options_template, comment_reply_template, render_comment_tree with context %}
 {% from 'macros/datetime.jinja2' import adaptive_date_responsive, time_ago %}
 {% from 'macros/forms.jinja2' import markdown_textarea %}
+{% from 'macros/groups.jinja2' import group_segmented_link %}
 {% from 'macros/links.jinja2' import group_linked, username_linked %}
 {% from 'macros/topics.jinja2' import topic_voting with context %}
 {% from 'macros/utils.jinja2' import pluralize %}
@@ -26,11 +27,7 @@
 {% endblock %}
 
 {% block header_context_link %}
-  {# Split the link out for each "segment" of the group path #}
-  <a class="site-header-context" href="/~{{ topic.group.path[0:1] }}">~{{ topic.group.path[0:1] }}</a>
-  {% for i in range(1, topic.group.path|length) %}
-    .<a class="site-header-context" href="/~{{ topic.group.path[0:i+1] }}">{{ topic.group.path[i:i+1] }}</a>
-  {% endfor %}
+  {{ group_segmented_link(topic.group, class="site-header-context") }}
 {% endblock %}
 
 {% block content %}

tildes/tildes/templates/topic_listing.jinja2

@@ -4,18 +4,14 @@
 {% extends 'base.jinja2' %}
 
 {% from 'macros/forms.jinja2' import search_form %}
-{% from 'macros/groups.jinja2' import render_group_subscription_box with context %}
+{% from 'macros/groups.jinja2' import group_segmented_link, render_group_subscription_box with context %}
 {% from 'macros/links.jinja2' import group_linked %}
 {% from 'macros/topics.jinja2' import render_topic_for_listing with context %}
 
 {% block title %}Topics in ~{{ group.path }}{% endblock %}
 
 {% block header_context_link %}
-  {# Split the link out for each "segment" of the group path #}
-  <a class="site-header-context" href="/~{{ group.path[0:1] }}">~{{ group.path[0:1] }}</a>
-  {% for i in range(1, group.path|length) %}
-    .<a class="site-header-context" href="/~{{ group.path[0:i+1] }}">{{ group.path[i:i+1] }}</a>
-  {% endfor %}
+  {{ group_segmented_link(group, class="site-header-context") }}
 {% endblock %}
 
 {% block content %}