--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wiki/signals.py	Wed Nov 07 20:17:33 2012 -0600
@@ -0,0 +1,35 @@
+"""Signal handlers for wiki integration.
+
+"""
+import logging
+
+from django.contrib.auth.signals import user_logged_in, user_logged_out
+
+
+logger = logging.getLogger(__name__)
+
+
+def login_callback(sender, request, user, **kwargs):
+    """Signal callback function for a user logging in.
+
+    Sets a flag for the middleware to create an external cookie.
+
+    """
+    logger.info('User login: %s', user.username)
+
+    request.session['wiki_set_cookie'] = True
+
+
+def logout_callback(sender, request, user, **kwargs):
+    """Signal callback function for a user logging in.
+
+    Sets a flag for the middleware to delete the external cookie.
+
+    """
+    logger.info('User logout: %s', user.username)
+
+    request.session['wiki_delete_cookie'] = True
+
+
+user_logged_in.connect(login_callback, dispatch_uid='wiki.signals.login')
+user_logged_out.connect(logout_callback, dispatch_uid='wiki.signals.logout')