Moved Jinja2 stuff to its own module, and added |undertitle filter.

pillar/web/jinja.py

@@ -0,0 +1,32 @@
+"""Our custom Jinja filters and other template stuff."""
+
+from __future__ import absolute_import
+
+import jinja2.filters
+
+from pillar.web.utils import pretty_date
+from pillar.web.nodes.routes import url_for_node
+
+
+def format_pretty_date(d):
+    return pretty_date(d)
+
+
+def format_pretty_date_time(d):
+    return pretty_date(d, detail=True)
+
+
+def format_undertitle(s):
+    """Underscore-replacing title filter.
+
+    Replaces underscores with spaces, and then applies Jinja2's own title filter.
+    """
+
+    return jinja2.filters.do_title(s.replace('_', ' '))
+
+
+def setup_jinja_env(jinja_env):
+    jinja_env.filters['pretty_date'] = format_pretty_date
+    jinja_env.filters['pretty_date_time'] = format_pretty_date_time
+    jinja_env.filters['undertitle'] = format_undertitle
+    jinja_env.globals['url_for_node'] = url_for_node