fix: pre-3.12 enum check, create _callbacks dict

src/aioappsrv/app.py

@@ -30,6 +30,7 @@ class AppService:
 			logger: logging.Logger | None = None,
 	):
 		self._rx = web.Application()
+		self._callbacks = {}
 		
 		self.as_token = as_token
 		self.hs_token = hs_token
@@ -53,10 +54,12 @@ class AppService:
 		body = await request.json()
 		for doc in body["events"]:
 			event = Event(**doc)
-			if event.type not in EventType:
+			if event.type not in EventType.all(): # TODO: python 3.12 makes the .all() unnecessary
 				self.logger.warn("unhandled event of type %s, ignoring", event["type"])
 				continue
 			self.logger.debug("dispatching event %s for %s", event.type)
+			if event.type not in self._callbacks:
+				self._callbacks[event.type] = {}
 			asyncio.get_event_loop().create_task(
 				self._callbacks[event.type][event.room_id](event)
 			)

src/aioappsrv/matrix.py

@@ -12,6 +12,14 @@ class EventType(Enum):
 	MEMBER    = "m.room.member"
 	REDACTION = "m.room.redaction"
 
+	@staticmethod
+	def all() -> set[str]:
+		return {
+			"m.room.message",
+			"m.room.member",
+			"m.room.redaction",
+		}
+
 @dataclass
 class Event:
 	content: dict[str, Any]