added logging

lib/_arrival_detection.py

@@ -4,6 +4,8 @@ from __future__ import annotations
 
 import logging
 import time
+from datetime import datetime
+from pathlib import Path
 
 from lib._zyxel import ZyxelError, ZyxelRouter, normalize_mac
 from notify import send_notification
@@ -53,11 +55,16 @@ def _build_router(config: dict) -> ZyxelRouter:
 def _notify(config: dict, device: dict) -> None:
     LOG.info("ARRIVAL: %s", device["name"])
     notification = config.get("notification", {})
-    if not notification.get("enabled", True):
-        return
     message = str(notification.get("message", "{name} arrived home")).format(
         name=device["name"], mac=device["mac"]
     )
+    event_log = notification.get("event_log")
+    if event_log:
+        timestamp = datetime.now().astimezone().isoformat(timespec="seconds")
+        with Path(event_log).open("a", encoding="utf-8") as stream:
+            stream.write(f"{timestamp} {message}\n")
+    if not notification.get("enabled", True):
+        return
     send_notification(
         message,
         topic_url=notification.get("topic_url") or None,