events: fix monitored task not removing state (#6386)

when `save_on_success` is set, a task failure saves state. when it succeeds afterwards, that state should be removed

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

authentik/events/monitored_tasks.py

@@ -76,9 +76,20 @@ class TaskInfo:
             return cache.get_many(cache.keys(CACHE_KEY_PREFIX + name)).values()
         return cache.get(CACHE_KEY_PREFIX + name, None)
 
+    @property
+    def full_name(self) -> str:
+        """Get the full cache key with task name and UID"""
+        key = CACHE_KEY_PREFIX + self.task_name
+        if self.result.uid:
+            uid_suffix = f":{self.result.uid}"
+            key += uid_suffix
+            if not self.task_name.endswith(uid_suffix):
+                self.task_name += uid_suffix
+        return key
+
     def delete(self):
         """Delete task info from cache"""
-        return cache.delete(CACHE_KEY_PREFIX + self.task_name)
+        return cache.delete(self.full_name)
 
     def update_metrics(self):
         """Update prometheus metrics"""
@@ -97,12 +108,8 @@ class TaskInfo:
 
     def save(self, timeout_hours=6):
         """Save task into cache"""
-        key = CACHE_KEY_PREFIX + self.task_name
-        if self.result.uid:
-            key += f":{self.result.uid}"
-            self.task_name += f":{self.result.uid}"
         self.update_metrics()
-        cache.set(key, self, timeout=timeout_hours * 60 * 60)
+        cache.set(self.full_name, self, timeout=timeout_hours * 60 * 60)
 
 
 class MonitoredTask(Task):

authentik/events/tests/test_tasks.py

@@ -0,0 +1,43 @@
+"""Test Monitored tasks"""
+from django.test import TestCase
+
+from authentik.events.monitored_tasks import MonitoredTask, TaskInfo, TaskResult, TaskResultStatus
+from authentik.lib.generators import generate_id
+from authentik.root.celery import CELERY_APP
+
+
+class TestMonitoredTasks(TestCase):
+    """Test Monitored tasks"""
+
+    def test_failed_successful_remove_state(self):
+        """Test that a task with `save_on_success` set to `False` that failed saves
+        a state, and upon successful completion will delete the state"""
+        should_fail = True
+        uid = generate_id()
+
+        @CELERY_APP.task(
+            bind=True,
+            base=MonitoredTask,
+        )
+        def test_task(self: MonitoredTask):
+            self.save_on_success = False
+            self.set_uid(uid)
+            self.set_status(
+                TaskResult(TaskResultStatus.ERROR if should_fail else TaskResultStatus.SUCCESSFUL)
+            )
+
+        # First test successful run
+        should_fail = False
+        test_task.delay().get()
+        self.assertIsNone(TaskInfo.by_name(f"test_task:{uid}"))
+
+        # Then test failed
+        should_fail = True
+        test_task.delay().get()
+        info = TaskInfo.by_name(f"test_task:{uid}")
+        self.assertEqual(info.result.status, TaskResultStatus.ERROR)
+
+        # Then after that, the state should be removed
+        should_fail = False
+        test_task.delay().get()
+        self.assertIsNone(TaskInfo.by_name(f"test_task:{uid}"))