init commit

app/bot/handlers/utils.py

@@ -0,0 +1,43 @@
+import re
+from typing import Tuple, Optional, Any
+from telegram.constants import ChatType
+from telegram.error import Forbidden, BadRequest
+
+async def verify_and_fetch_chat(ctx, raw: str | int):
+    """Return (chat, member, can_post) for the bot in that chat."""
+    bot = ctx.bot
+
+    # Normalize t.me links to @username
+    if isinstance(raw, str) and "t.me/" in raw:
+        raw = raw.strip().split("t.me/")[-1]
+        raw = raw.strip().lstrip("/")
+        if raw and not raw.startswith("@"):
+            raw = "@" + raw
+
+    chat = await bot.get_chat(raw)
+    try:
+        member = await bot.get_chat_member(chat.id, bot.id)
+    except Forbidden:
+        return chat, None, False
+    except BadRequest as e:
+        raise e
+
+    can_post = False
+    if chat.type == ChatType.CHANNEL:
+        status = getattr(member, "status", "")
+        if status in ("administrator", "creator"):
+            flag = getattr(member, "can_post_messages", None)
+            can_post = True if (flag is None or flag is True) else False
+    elif chat.type in (ChatType.SUPERGROUP, ChatType.GROUP):
+        status = getattr(member, "status", "")
+        can_post = status in ("member", "administrator", "creator")
+    return chat, member, can_post
+
+def parse_chat_id(text: str) -> int | None:
+    m = re.search(r'(-?\d{5,})', text or "")
+    if m:
+        try:
+            return int(m.group(1))
+        except ValueError:
+            return None
+    return None