Add 'is_internal' utility for checking user memberships

gracedb/ligoauth/context_processors.py

 from django.conf import settings
 
+from .utils import is_internal
+
+
 def LigoAuthContext(request):
 
     user_is_internal = False
     user_is_lvem = False
     user_is_advocate = False # user is an EM advocate
     if request.user:
-        if request.user.groups.filter(name=settings.LVC_GROUP).exists():
+        if is_internal(request.user):
             user_is_internal = True
         if request.user.groups.filter(name=settings.LVEM_GROUP).exists():
             user_is_lvem = True

gracedb/ligoauth/utils.py

+from django.conf import settings
 from django.http import HttpResponseForbidden
 from django.utils.functional import wraps
 
+
 def groups_allowed(group_names):
     """
     Decorator to allow access to specified group(s).
@@ -23,3 +25,6 @@ def groups_allowed(group_names):
         return wrapper
     return decorator
 
+
+def is_internal(user):
+    return user.groups.filter(name=settings.LVC_GROUP).exists()