Introduce resolve_permission() utility function

netbox/utilities/permissions.py

@@ -1,3 +1,6 @@
+from django.contrib.contenttypes.models import ContentType
+
+
 def get_permission_for_model(model, action):
     """
     Resolve the named permission for a given model (or instance) and action (e.g. view or add).
@@ -13,3 +16,20 @@ def get_permission_for_model(model, action):
         action,
         model._meta.model_name
     )
+
+
+def resolve_permission(name):
+    """
+    Given a permission name, return the relevant ContentType and action. For example, "dcim.view_site" returns
+    (Site, "view").
+
+    :param name: Permission name in the format <app>.<action>_<model>
+    """
+    app_label, codename = name.split('.')
+    action, model_name = codename.split('_')
+    try:
+        content_type = ContentType.objects.get(app_label=app_label, model=model_name)
+    except ContentType.DoesNotExist:
+        raise ValueError(f"Unknown app/model for {name}")
+
+    return content_type, action