start support for redaction events

matrix_alertbot/callback.py

@@ -7,6 +7,7 @@ from nio import (
     JoinError,
     MatrixRoom,
     MegolmEvent,
+    RedactionEvent,
     RoomGetEventError,
     RoomMessageText,
     UnknownEvent,
@@ -219,6 +220,18 @@ class Callbacks:
             f"commands a second time)."
         )
 
+    async def redaction(self, room: MatrixRoom, event: RedactionEvent) -> None:
+        # Ignore events from unauthorized room
+        if room.room_id != self.config.room_id:
+            return
+
+        # Ignore redactions from ourselves
+        if event.sender == self.config.user_id:
+            return
+
+        redacted_event = await self.client.room_get_event(room.room_id, event.redacts)
+        print(redacted_event.source)
+
     async def unknown(self, room: MatrixRoom, event: UnknownEvent) -> None:
         """Callback for when an event with a type that is unknown to matrix-nio is received.
         Currently this is used for reaction events, which are not yet part of a released

matrix_alertbot/main.py

@@ -3,7 +3,6 @@ import asyncio
 import logging
 import sys
 from asyncio import TimeoutError
-from time import sleep
 
 from aiohttp import ClientConnectionError, ServerDisconnectedError
 from diskcache import Cache
@@ -14,6 +13,7 @@ from nio import (
     LocalProtocolError,
     LoginError,
     MegolmEvent,
+    RedactionEvent,
     RoomMessageText,
     UnknownEvent,
 )
@@ -129,6 +129,7 @@ def main() -> None:
     )
     client.add_event_callback(callbacks.decryption_failure, (MegolmEvent,))
     client.add_event_callback(callbacks.unknown, (UnknownEvent,))
+    client.add_event_callback(callbacks.redaction, (RedactionEvent,))
 
     # Configure webhook server
     webhook_server = Webhook(client, cache, config)