core: fix source flow_manager not always appending save stage (#9659)

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

authentik/core/sources/flow_manager.py

@@ -13,7 +13,7 @@ from django.utils.translation import gettext as _
 from structlog.stdlib import get_logger
 
 from authentik.core.models import Source, SourceUserMatchingModes, User, UserSourceConnection
-from authentik.core.sources.stage import PLAN_CONTEXT_SOURCES_CONNECTION, PostUserEnrollmentStage
+from authentik.core.sources.stage import PLAN_CONTEXT_SOURCES_CONNECTION, PostSourceStage
 from authentik.events.models import Event, EventAction
 from authentik.flows.exceptions import FlowNonApplicableException
 from authentik.flows.models import Flow, FlowToken, Stage, in_memory_stage
@@ -206,13 +206,9 @@ class SourceFlowManager:
 
     def get_stages_to_append(self, flow: Flow) -> list[Stage]:
         """Hook to override stages which are appended to the flow"""
-        if not self.source.enrollment_flow:
-            return []
-        if flow.slug == self.source.enrollment_flow.slug:
-            return [
-                in_memory_stage(PostUserEnrollmentStage),
-            ]
-        return []
+        return [
+            in_memory_stage(PostSourceStage),
+        ]
 
     def _prepare_flow(
         self,
@@ -266,6 +262,8 @@ class SourceFlowManager:
             )
         # We run the Flow planner here so we can pass the Pending user in the context
         planner = FlowPlanner(flow)
+        # We append some stages so the initial flow we get might be empty
+        planner.allow_empty_flows = True
         plan = planner.plan(self.request, kwargs)
         for stage in self.get_stages_to_append(flow):
             plan.append_stage(stage)
@@ -324,7 +322,7 @@ class SourceFlowManager:
             reverse(
                 "authentik_core:if-user",
             )
-            + f"#/settings;page-{self.source.slug}"
+            + "#/settings;page-sources"
         )
 
     def handle_enroll(

authentik/core/sources/stage.py

@@ -10,7 +10,7 @@ from authentik.flows.stage import StageView
 PLAN_CONTEXT_SOURCES_CONNECTION = "goauthentik.io/sources/connection"
 
 
-class PostUserEnrollmentStage(StageView):
+class PostSourceStage(StageView):
     """Dynamically injected stage which saves the Connection after
     the user has been enrolled."""
 
@@ -21,10 +21,12 @@ class PostUserEnrollmentStage(StageView):
         ]
         user: User = self.executor.plan.context[PLAN_CONTEXT_PENDING_USER]
         connection.user = user
+        linked = connection.pk is None
         connection.save()
-        Event.new(
-            EventAction.SOURCE_LINKED,
-            message="Linked Source",
-            source=connection.source,
-        ).from_http(self.request)
+        if linked:
+            Event.new(
+                EventAction.SOURCE_LINKED,
+                message="Linked Source",
+                source=connection.source,
+            ).from_http(self.request)
         return self.executor.stage_ok()

authentik/core/tests/test_source_flow_manager.py

@@ -2,11 +2,15 @@
 
 from django.contrib.auth.models import AnonymousUser
 from django.test import TestCase
+from django.urls import reverse
 from guardian.utils import get_anonymous_user
 
 from authentik.core.models import SourceUserMatchingModes, User
 from authentik.core.sources.flow_manager import Action
+from authentik.core.sources.stage import PostSourceStage
 from authentik.core.tests.utils import create_test_flow
+from authentik.flows.planner import FlowPlan
+from authentik.flows.views.executor import SESSION_KEY_PLAN
 from authentik.lib.generators import generate_id
 from authentik.lib.tests.utils import get_request
 from authentik.policies.denied import AccessDeniedResponse
@@ -21,41 +25,55 @@ class TestSourceFlowManager(TestCase):
 
     def setUp(self) -> None:
         super().setUp()
-        self.source: OAuthSource = OAuthSource.objects.create(name="test")
+        self.authentication_flow = create_test_flow()
+        self.enrollment_flow = create_test_flow()
+        self.source: OAuthSource = OAuthSource.objects.create(
+            name=generate_id(),
+            slug=generate_id(),
+            authentication_flow=self.authentication_flow,
+            enrollment_flow=self.enrollment_flow,
+        )
         self.identifier = generate_id()
 
     def test_unauthenticated_enroll(self):
         """Test un-authenticated user enrolling"""
-        flow_manager = OAuthSourceFlowManager(
-            self.source, get_request("/", user=AnonymousUser()), self.identifier, {}
-        )
+        request = get_request("/", user=AnonymousUser())
+        flow_manager = OAuthSourceFlowManager(self.source, request, self.identifier, {})
         action, _ = flow_manager.get_action()
         self.assertEqual(action, Action.ENROLL)
-        flow_manager.get_flow()
+        response = flow_manager.get_flow()
+        self.assertEqual(response.status_code, 302)
+        flow_plan: FlowPlan = request.session[SESSION_KEY_PLAN]
+        self.assertEqual(flow_plan.bindings[0].stage.view, PostSourceStage)
 
     def test_unauthenticated_auth(self):
         """Test un-authenticated user authenticating"""
         UserOAuthSourceConnection.objects.create(
             user=get_anonymous_user(), source=self.source, identifier=self.identifier
         )
-
-        flow_manager = OAuthSourceFlowManager(
-            self.source, get_request("/", user=AnonymousUser()), self.identifier, {}
-        )
+        request = get_request("/", user=AnonymousUser())
+        flow_manager = OAuthSourceFlowManager(self.source, request, self.identifier, {})
         action, _ = flow_manager.get_action()
         self.assertEqual(action, Action.AUTH)
-        flow_manager.get_flow()
+        response = flow_manager.get_flow()
+        self.assertEqual(response.status_code, 302)
+        flow_plan: FlowPlan = request.session[SESSION_KEY_PLAN]
+        self.assertEqual(flow_plan.bindings[0].stage.view, PostSourceStage)
 
     def test_authenticated_link(self):
         """Test authenticated user linking"""
         user = User.objects.create(username="foo", email="foo@bar.baz")
-        flow_manager = OAuthSourceFlowManager(
-            self.source, get_request("/", user=user), self.identifier, {}
-        )
+        request = get_request("/", user=user)
+        flow_manager = OAuthSourceFlowManager(self.source, request, self.identifier, {})
         action, connection = flow_manager.get_action()
         self.assertEqual(action, Action.LINK)
         self.assertIsNone(connection.pk)
-        flow_manager.get_flow()
+        response = flow_manager.get_flow()
+        self.assertEqual(response.status_code, 302)
+        self.assertEqual(
+            response.url,
+            reverse("authentik_core:if-user") + "#/settings;page-sources",
+        )
 
     def test_unauthenticated_link(self):
         """Test un-authenticated user linking"""