Added a model for event state (including data migration, signal based

notifications, etc.)

dav_events/utils.py

@@ -1,11 +1,20 @@
 import logging
 from django.apps import apps
+from django.contrib.auth import get_user_model
 from django.contrib.auth.models import Group
 
 app_config = apps.get_containing_app_config(__package__)
 logger = logging.getLogger(__name__)
 
 
+def get_system_user():
+    return get_user_model().objects.get_or_create(username='-system-')[0]
+
+
+def get_ghost_user():
+    return get_user_model().objects.get_or_create(username='-deleted-')[0]
+
+
 def get_group_members(group_name, ignore_missing=False):
     users = []
     try: