sources/plex: add background task to monitor validity of plex token

closes #1205

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

authentik/sources/plex/tasks.py

@@ -0,0 +1,43 @@
+"""Plex tasks"""
+from requests import RequestException
+
+from authentik.events.models import Event, EventAction
+from authentik.events.monitored_tasks import MonitoredTask, TaskResult, TaskResultStatus
+from authentik.root.celery import CELERY_APP
+from authentik.sources.plex.models import PlexSource
+from authentik.sources.plex.plex import PlexAuth
+
+
+@CELERY_APP.task()
+def check_plex_token_all():
+    """Check plex token for all plex sources"""
+    for source in PlexSource.objects.all():
+        check_plex_token.delay(source.slug)
+
+
+@CELERY_APP.task(bind=True, base=MonitoredTask)
+def check_plex_token(self: MonitoredTask, source_slug: int):
+    """Check the validity of a Plex source."""
+    sources = PlexSource.objects.filter(slug=source_slug)
+    if not sources.exists():
+        return
+    source: PlexSource = sources.first()
+    self.set_uid(source.slug)
+    auth = PlexAuth(source, source.plex_token)
+    try:
+        auth.get_user_info()
+        self.set_status(
+            TaskResult(TaskResultStatus.SUCCESSFUL, ["Plex token is valid."])
+        )
+    except RequestException as exc:
+        self.set_status(
+            TaskResult(
+                TaskResultStatus.ERROR,
+                ["Plex token is invalid/an error occurred:", str(exc)],
+            )
+        )
+        Event.new(
+            EventAction.CONFIGURATION_ERROR,
+            message=f"Plex token invalid, please re-authenticate source.\n{str(exc)}",
+            source=source,
+        ).save()