refactor(exec_bridge): use taskgroup poller

codex_telegram_bridge/src/codex_telegram_bridge/exec_bridge.py

@@ -580,25 +580,11 @@ async def _handle_message(
         )
 
 
-async def _run_main_loop(cfg: BridgeConfig) -> None:
-    semaphore = asyncio.Semaphore(cfg.max_concurrency)
-
-    tasks: set[asyncio.Task[None]] = set()
-
-    def _task_done(task: asyncio.Task[None]) -> None:
-        tasks.discard(task)
-        try:
-            task.result()
-        except asyncio.CancelledError:
-            pass
-        except Exception:
-            logger.exception("[handle] task failed")
-
+async def poll_updates(cfg: BridgeConfig):
     offset: int | None = None
     offset = await _drain_backlog(cfg, offset)
     await _send_startup(cfg)
 
-    try:
     while True:
         try:
             updates = await cfg.bot.get_updates(
@@ -612,37 +598,54 @@ async def _run_main_loop(cfg: BridgeConfig) -> None:
 
         for upd in updates:
             offset = upd["update_id"] + 1
-                msg = upd.get("message") or {}
-                msg_chat_id = msg.get("chat", {}).get("id")
+            msg = upd["message"]
             if "text" not in msg:
                 continue
-                if int(msg_chat_id) != cfg.chat_id:
-                    continue
-                if msg.get("from", {}).get("is_bot"):
+            if not (msg["chat"]["id"] == msg["from"]["id"] == cfg.chat_id):
                 continue
+            yield msg
 
+
+async def _run_main_loop(cfg: BridgeConfig) -> None:
+    semaphore = asyncio.Semaphore(cfg.max_concurrency)
+
+    async def _handle_message_task(
+        *,
+        chat_id: int,
+        user_msg_id: int,
+        text: str,
+        resume_session: str | None,
+    ) -> None:
+        try:
+            await _handle_message(
+                cfg,
+                semaphore=semaphore,
+                chat_id=chat_id,
+                user_msg_id=user_msg_id,
+                text=text,
+                resume_session=resume_session,
+            )
+        except Exception:
+            logger.exception("[handle] task failed")
+
+    try:
+        async with asyncio.TaskGroup() as tg:
+            async for msg in poll_updates(cfg):
                 text = msg["text"]
                 user_msg_id = msg["message_id"]
                 resume_session = extract_session_id(text)
                 r = msg.get("reply_to_message") or {}
                 resume_session = resume_session or extract_session_id(r.get("text"))
 
-                task = asyncio.create_task(
-                    _handle_message(
-                        cfg,
-                        semaphore=semaphore,
-                        chat_id=msg_chat_id,
+                tg.create_task(
+                    _handle_message_task(
+                        chat_id=msg["chat"]["id"],
                         user_msg_id=user_msg_id,
                         text=text,
                         resume_session=resume_session,
                     )
                 )
-                tasks.add(task)
-                task.add_done_callback(_task_done)
     finally:
-        for task in tasks:
-            task.cancel()
-        await asyncio.gather(*tasks, return_exceptions=True)
         await cfg.bot.close()