feat: Implement inotify watch with debounced Immich library scan

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

main.py

@@ -5,13 +5,59 @@ logging.basicConfig(
         level=logging.DEBUG if DEBUG else logging.INFO)
 
 import secrets
+import threading
+import requests
+from inotify_simple import INotify, flags
 
 WATCH_PATHS = [
     '/tmp/watch-test',
 ]
 
+SCAN_DELAY_SECONDS = 5
+timer = None
+
+
+def trigger_scan():
+    """Trigger a library scan in Immich."""
+    logging.info("Triggering Immich library scan.")
+    url = f"https://photos.dns.t0.vc/api/libraries/{secrets.LIBRARY_UUID}/scan"
+    headers = {
+        'Accept': 'application/json',
+        'x-api-key': secrets.IMMICH_API_KEY,
+    }
+    try:
+        response = requests.post(url, headers=headers)
+        response.raise_for_status()
+        logging.info(f"Scan triggered successfully: {response.status_code}")
+    except requests.exceptions.RequestException as e:
+        logging.error(f"Failed to trigger scan: {e}")
+
+
 def main():
-    pass
+    global timer
+    watch_flags = flags.MODIFY | flags.CREATE | flags.DELETE | flags.MOVED_FROM | flags.MOVED_TO
+
+    with INotify() as inotify:
+        for path in WATCH_PATHS:
+            logging.info(f"Watching {path}")
+            inotify.add_watch(path, watch_flags)
+
+        try:
+            while True:
+                events = inotify.read(timeout=1000)
+                if events:
+                    for event in events:
+                        logging.debug(f"Event: {event!r}")
+                    if timer:
+                        timer.cancel()
+                    timer = threading.Timer(SCAN_DELAY_SECONDS, trigger_scan)
+                    timer.start()
+                    logging.info(f"Modification detected. Triggering scan in {SCAN_DELAY_SECONDS} seconds.")
+        except KeyboardInterrupt:
+            logging.info("Shutting down...")
+        finally:
+            if timer:
+                timer.cancel()
 
 
 if __name__ == '__main__':