welcomecenterbot/bot/handlers/handle_members_change.py

from handlers.send_button import show_request_msg
from api import delete_message
from storage import Profile, storage
from config import FEEDBACK_CHAT_ID


async def handle_join(msg):
    chat_id = str(msg["chat"]["id"])
    from_id = str(msg["from"]["id"])

    actor = Profile.get(from_id, msg)

    newcomer_id = str(msg["new_chat_member"]["id"])
    if from_id == newcomer_id:
        if len(actor["parents"]) == 0 and str(chat_id) != FEEDBACK_CHAT_ID:
            # показываем сообщение с кнопкой "поручиться"
            r = await show_request_msg(msg)
            print(r)
        else:
            # за пользователя поручились ранее
            pass
    else:
        # пользователи приглашены другим участником
        print(f'{len(msg["new_chat_members"])} members were invited by {from_id}')
        for m in msg["new_chat_members"]:
            newcomer = Profile.get(m["id"])
            newcomer["parents"].append(str(from_id))
            Profile.save(newcomer)
            actor["children"].append(str(m["id"]))
        # обновляем профиль пригласившего
        Profile.save(actor)


async def handle_left(msg):
    print("handling member leaving")
    member_id = msg["left_chat_member"]["id"]
    chat_id = msg["chat"]["id"]

    # удаление сообщения с кнопкой в этом чате
    prev_msg = storage.get(f"btn-{chat_id}-{member_id}")
    if prev_msg:
        r = await delete_message(chat_id, prev_msg["id"])
        print(r)
        storage.remove(f"btn-{chat_id}-{member_id}")