[#340] Better state management for alarms.

platypush/plugins/alarm/__init__.py

@@ -3,7 +3,7 @@ import sys
 from threading import RLock
 from typing import Collection, Generator, Optional, Dict, Any, List, Union
 
-from sqlalchemy.orm import Session, make_transient
+from sqlalchemy.orm import Session
 
 from platypush.context import get_plugin
 from platypush.entities import EntityManager
@@ -182,7 +182,6 @@ class AlarmPlugin(RunnablePlugin, EntityManager):
     def _clear_alarm(self, alarm: DbAlarm, session: Session):
         self.alarms.pop(str(alarm.name), None)
         session.delete(alarm)
-        make_transient(alarm)
         self._bus.post(EntityDeleteEvent(entity=alarm))
 
     def _clear_expired_alarms(self, session: Session):

platypush/plugins/alarm/_model.py

@@ -129,7 +129,11 @@ class Alarm:
         return self._enabled
 
     def is_shut_down(self):
-        return self.state == AlarmState.SHUTDOWN
+        return self.state in {
+            AlarmState.SHUTDOWN,
+            AlarmState.DISMISSED,
+            AlarmState.UNKNOWN,
+        }
 
     def is_expired(self):
         return (self.get_next() or 0) < time.time()
@@ -283,6 +287,7 @@ class Alarm:
             snooze_interval=alarm.snooze_interval,  # type: ignore
             enabled=bool(alarm.enabled),
             static=bool(alarm.static),
+            state=getattr(AlarmState, str(alarm.state)),
             **kwargs,
         )