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30 lines
1.1 KiB
Python
30 lines
1.1 KiB
Python
from typing import Optional, Tuple
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from telegram import ChatMemberUpdated, ChatMember
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def extract_status_change(chat_member_update: ChatMemberUpdated) -> Optional[Tuple[bool, bool]]:
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"""Takes a ChatMemberUpdated instance and extracts whether the 'old_chat_member' was a member
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of the chat and whether the 'new_chat_member' is a member of the chat. Returns None, if
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the status didn't change.
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"""
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status_change = chat_member_update.difference().get("status")
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old_is_member, new_is_member = chat_member_update.difference().get("is_member", (None, None))
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if status_change is None:
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return None
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old_status, new_status = status_change
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was_member = old_status in [
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ChatMember.MEMBER,
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ChatMember.OWNER,
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ChatMember.ADMINISTRATOR,
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] or (old_status == ChatMember.RESTRICTED and old_is_member is True)
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is_member = new_status in [
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ChatMember.MEMBER,
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ChatMember.OWNER,
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ChatMember.ADMINISTRATOR,
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] or (new_status == ChatMember.RESTRICTED and new_is_member is True)
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return was_member, is_member
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