add nav_extras.py template tags

procat2/templatetags/nav_extras.py

@@ -0,0 +1,28 @@
+from django import template
+from django.contrib.auth import get_user
+from lazysignup.utils import is_lazy_user
+import logging
+
+log = logging.getLogger(__name__)
+
+register = template.Library()
+
+
+@register.simple_tag(takes_context=True)
+def if_in_app(context, app_name, output):
+    """If this view is in app 'app_name', output 'output'"""
+    current_app = context['request'].current_app
+    return output if app_name == current_app else ''
+
+
+@register.simple_tag(takes_context=True)
+def username(context):
+    """Return a sensible name for the current user."""
+    user = get_user(context['request'])
+
+    if is_lazy_user(user):
+        return "Guest"
+    elif user.is_anonymous:
+        return "Anon"
+    else:
+        return user.get_full_name()