re-add rss feeds

app/templates/topics/topic.atom

@@ -0,0 +1,21 @@
+{% from 'common/macros.html' import rss_html_content %}
+{%- extends 'base.atom' -%}
+{%- block title -%}latest threads in {{topic.name | escape}}{%- endblock -%}
+{%- block canonical_link -%}{{ url_for('topics.topic_by_id', topic_id=topic.id, _external=true) }}{%- endblock -%}
+{%- block content -%}
+  <subtitle>{{ topic.description | escape }}</subtitle>
+  {%- for thread in threads_list -%}
+    <entry>
+      <title>{{ thread.title | escape }}</title>
+      <link href="{{ url_for('threads.thread_by_id', thread_id=thread.id, _external=true) }}"/>
+      <link rel="replies" type="application/atom+xml" href="{{ url_for('threads.feed', thread_id=thread.id, _external=true) }}"/>
+      <id>{{ url_for('threads.thread_by_id', thread_id=thread.id, _external=true) }}</id>
+      {{ rss_html_content(thread.original_post_content) }}
+      <updated>{{ thread.created_at | iso8601 }}</updated>
+      <author>
+        <name>{{ thread.started_by_display_name | escape }} @{{ thread.started_by }}</name>
+        <uri>{{ url_for('users.user_page', username=thread.started_by, _external=true) }}</uri>
+      </author>
+    </entry>
+  {%- endfor -%}
+{%- endblock -%}

app/templates/topics/topic.html

@@ -20,7 +20,7 @@
   <a href="{{url_for('topics.feed', topic_id=topic.id)}}" class="linkbutton rss">Subscribe via RSS</a>
   <form method="GET">
     <select name="sort_by">
-      <option value="activity"{% if sort_by == 'activity' %}selected{% endif %}>Sorted by activity</option>
+      <option value="activity" {% if sort_by == 'activity' %}selected{% endif %}>Sorted by activity</option>
       <option value="thread" {% if sort_by == 'thread' %}selected{% endif %}>Sorted by newest</option>
     </select>
     <input type="submit" value="Sort">