Implement reconnect, idle reporting, and security hardening

src/lazy_enter/slack_handler.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import logging
+import time
 
 from slack_bolt import App
 from slack_bolt.adapter.socket_mode import SocketModeHandler
@@ -19,7 +20,8 @@ class SlackHandler:
     def __init__(self, config: Config) -> None:
         self.config = config
         self.app = App(token=config.slack_bot_token)
-        self._handler = SocketModeHandler(self.app, config.slack_app_token)
+        self._handler: SocketModeHandler | None = None
+        self._stop_requested = False
         self._on_message_callback: callable | None = None
         self._on_command_callback: callable | None = None
 
@@ -98,11 +100,31 @@ class SlackHandler:
         )
 
     def start(self) -> None:
-        """Socket Mode 핸들러를 시작한다."""
+        """Socket Mode 핸들러를 시작한다. 연결이 끊기면 재연결한다."""
+        self._stop_requested = False
         logger.info("Slack Socket Mode 시작")
-        self._handler.start()
+
+        while not self._stop_requested:
+            try:
+                self._handler = SocketModeHandler(self.app, self.config.slack_app_token)
+                self._handler.start()
+            except Exception:
+                if self._stop_requested:
+                    break
+                logger.exception("Socket Mode 연결이 종료되었습니다.")
+
+            if self._stop_requested:
+                break
+
+            logger.warning(
+                "Socket Mode 재연결 시도 (%s초 후)",
+                self.config.reconnect_delay_seconds,
+            )
+            time.sleep(self.config.reconnect_delay_seconds)
 
     def stop(self) -> None:
         """Socket Mode 핸들러를 종료한다."""
         logger.info("Slack Socket Mode 종료")
-        self._handler.close()
+        self._stop_requested = True
+        if self._handler is not None:
+            self._handler.close()