stages/authenticator_validate: create a default authenticator validate stage with sensible defaults

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

authentik/stages/authenticator_validate/migrations/0009_default_stage.py

@@ -0,0 +1,57 @@
+# Generated by Django 3.0.3 on 2020-05-08 14:30
+
+from django.apps.registry import Apps
+from django.db import migrations
+from django.db.backends.base.schema import BaseDatabaseSchemaEditor
+
+from authentik.stages.authenticator_validate.models import default_device_classes
+
+
+def create_default_validate_stage(apps: Apps, schema_editor: BaseDatabaseSchemaEditor):
+    Flow = apps.get_model("authentik_flows", "Flow")
+    FlowStageBinding = apps.get_model("authentik_flows", "FlowStageBinding")
+    AuthenticatorValidateStage = apps.get_model(
+        "authentik_stages_authenticator_validate", "AuthenticatorValidateStage"
+    )
+
+    db_alias = schema_editor.connection.alias
+
+    auth_flows = Flow.objects.using(db_alias).filter(slug="default-authentication-flow")
+    if not auth_flows.exists():
+        return
+
+    # If there's already a validation stage in the flow, skip
+    if (
+        AuthenticatorValidateStage.objects.using(db_alias)
+        .filter(flow__slug="default-authentication-flow")
+        .exists()
+    ):
+        return
+
+    validate_stage, _ = AuthenticatorValidateStage.objects.using(db_alias).update_or_create(
+        name="default-authentication-mfa-validation",
+        defaults={
+            "device_classes": default_device_classes,
+        },
+    )
+
+    FlowStageBinding.objects.using(db_alias).update_or_create(
+        target=auth_flows.first(),
+        stage=validate_stage,
+        defaults={
+            "order": 30,
+        },
+    )
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("authentik_flows", "0008_default_flows"),
+        (
+            "authentik_stages_authenticator_validate",
+            "0008_alter_authenticatorvalidatestage_device_classes",
+        ),
+    ]
+
+    operations = [migrations.RunPython(create_default_validate_stage)]