Implement tasks

core/messaging/text_export.py

@@ -0,0 +1,18 @@
+from __future__ import annotations
+
+from typing import Iterable
+
+from core.models import Message
+
+
+def normalize_message_text(message: Message) -> str:
+    text = str(getattr(message, "text", "") or "").strip()
+    return text or "(no text)"
+
+
+def plain_text_lines(messages: Iterable[Message]) -> list[str]:
+    return [normalize_message_text(message) for message in list(messages)]
+
+
+def plain_text_blob(messages: Iterable[Message]) -> str:
+    return "\n".join(plain_text_lines(messages))