Initial release

2026-06-02 10:58:24 +10:00
commit eace48732d
88 changed files with 11140 additions and 0 deletions
@@ -0,0 +1,53 @@
+import logging
+from aiogram.exceptions import TelegramAPIError, TelegramBadRequest, TelegramForbiddenError
+
+logger = logging.getLogger(__name__)
+
+# Errors that mean the user is definitively NOT in the chat
+_NOT_MEMBER_PHRASES = (
+    "user not found",
+    "participant not found",
+    "user_not_participant",
+    "chat not found",
+    "bot was kicked",
+    "bot is not a member",
+)
+
+# Errors that mean we simply can't verify (privacy / anonymous mode) - allow through
+_UNVERIFIABLE_PHRASES = (
+    "user_id_invalid",
+    "have no rights",
+    "not enough rights",
+    "administrators only",
+)
+
+
+async def check_membership(chat_id: int, user_id: int) -> bool:
+    """Check if a user is an active member of a Telegram chat.
+
+    Returns True when membership is confirmed OR when the check cannot be
+    performed due to anonymous/privacy settings (bot has admin rights but
+    Telegram hides the member - treat as verified to avoid false rejections).
+    """
+    from app.bot.router import bot
+
+    try:
+        member = await bot.get_chat_member(chat_id, user_id)
+        return member.status in ("member", "administrator", "creator", "restricted")
+    except TelegramBadRequest as e:
+        msg = str(e).lower()
+        if any(p in msg for p in _NOT_MEMBER_PHRASES):
+            return False
+        if any(p in msg for p in _UNVERIFIABLE_PHRASES):
+            logger.debug("Membership unverifiable for user %s in chat %s (%s) - allowing", user_id, chat_id, e)
+            return True
+        # Unknown bad request - conservative deny
+        logger.warning("getChatMember bad request for user %s in chat %s: %s", user_id, chat_id, e)
+        return False
+    except TelegramForbiddenError as e:
+        # Bot removed from chat or no rights at all
+        logger.warning("getChatMember forbidden for chat %s: %s", chat_id, e)
+        return False
+    except TelegramAPIError as e:
+        logger.warning("getChatMember error for user %s in chat %s: %s", user_id, chat_id, e)
+        return False