Improve Telegram forum onboarding and topic safety

adapter/telegram/converter.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 
 from aiogram.types import Message
 
+from adapter.telegram import db
 from core.protocol import Attachment, IncomingMessage, OutgoingEvent, OutgoingMessage, OutgoingUI
 
 
@@ -16,6 +17,21 @@ def from_message(message: Message, chat_id: str) -> IncomingMessage:
     )
 
 
+def is_forum_message(message: Message) -> bool:
+    return getattr(message, "message_thread_id", None) is not None
+
+
+def resolve_forum_chat_id(message: Message, tg_user_id: int) -> str | None:
+    thread_id = getattr(message, "message_thread_id", None)
+    if thread_id is None:
+        return None
+
+    chat = db.get_chat_by_thread(tg_user_id, thread_id)
+    if not chat:
+        return None
+    return chat["chat_id"]
+
+
 def _extract_attachments(message: Message) -> list[Attachment]:
     attachments: list[Attachment] = []
     if message.photo:
@@ -41,10 +57,10 @@ def _extract_attachments(message: Message) -> list[Attachment]:
     return attachments
 
 
-def format_outgoing(chat_name: str, event: OutgoingEvent) -> str:
-    prefix = f"[{chat_name}] "
+def format_outgoing(chat_name: str, event: OutgoingEvent, *, prefix: bool = True) -> str:
+    rendered_prefix = f"[{chat_name}] " if prefix else ""
     if isinstance(event, OutgoingMessage):
-        return prefix + event.text
+        return rendered_prefix + event.text
     if isinstance(event, OutgoingUI):
-        return prefix + event.text
-    return prefix + str(event)
+        return rendered_prefix + event.text
+    return rendered_prefix + str(event)