Superevents

Adding superevents to GraceDB, including the necessary models, utility functions, and API resources. This has also resulted in changes to the overall configuration and some parts of the events model.

Many models in the events app, like Labels, Tags, EventLogs, etc. were needed in a similar form for superevents. We were able to completely reuse the existing Label and Tag models for superevents. In other cases, we had to abstract the main functionality of the class into an abstract base class and then implement separate models for events and superevents, due to foreign key requirements. This should leave the current functionality of the events models unchanged.

Some portions of the events API have been modified because of one of the following reasons:

• It didn't make sense and was unnecessarily difficult to duplicate for superevents
• It was inefficient or bad

These changes are documented here: https://bugs.ligo.org/redmine/issues/6133

gracedb/events/permission_utils.py

@@ -5,6 +5,7 @@ from django.contrib.auth.models import Group
 from django.utils.functional import wraps
 from django.http import HttpResponseForbidden
 from django.http import HttpResponseServerError
+from django.contrib.contenttypes.models import ContentType
 from .models import Event
 from django.http import HttpRequest
 from rest_framework.request import Request
@@ -64,6 +65,24 @@ def assign_default_event_perms(event):
         assign_perm(view_codename, lvem, event)
         assign_perm(change_codename, lvem, event)
 
+
+def assign_default_perms(obj,
+    groups=[settings.LVC_GROUP, settings.EXEC_GROUP],
+    perms=['view', 'change']
+    ):
+    """
+    Assigns default permissions. Mostly used for events and superevents,
+    but can be used for any object (make sure to manually specify permissions
+    for objects without a 'view' permission.
+    """
+
+    model_name = obj.__class__.__name__.lower()
+    for g in groups:
+        group = Group.objects.get(name=g)
+        for p in perms:
+            perm_codename = '{0}_{1}'.format(p, model_name)
+            assign_perm(perm_codename, group, obj)
+
 #-------------------------------------------------------------------------------
 # A wrapper for views that checks whether the user is internal, and if not
 # returns a 403.