How to make a greeting when adding the same bot?

Question

Python

Hello Habr! I am making a chat bot and I want to make a greeting when the same bot is added. I found it in the documentation only when adding other users (maybe I'm blind and didn't see what it was). Thank you in advance!

Answer 1

I climbed the profile, but I didn’t mark the solution here, so there will be my option

if event.type == VkBotEventType.MESSAGE_NEW and (action := event.obj['message'].get('action')):
            if action['type'] == 'chat_invite_user' and action["member_id"] == -12345678: #вместо -12345678 айди группы с минусом
                vk.messages.send(
                    peer_id=event.message.peer_id,
                    random_id=get_random_id(),
                    message="Привет")

Answer 2

I would implement it somehow like this

import vk_api
from vk_api.bot_longpoll import VkBotLongPoll, VkBotEventType
from vk_api.utils import get_random_id

vk_session = vk_api.VkApi(token="tokengroup")  

longpoll = VkBotLongPoll(vk_session, 'idgroup')  

vk = vk_session.get_api()

while True:
    try:
        for event in longpoll.listen():
            if event.type == VkBotEventType.MESSAGE_NEW and event.raw['object']['message']['action']['type'] == 'chat_invite_user' and event.raw['object']['message']['action']['member_id'] == -12345678:  #вместо -12345678 впишите id своей группы
                vk.messages.send(
                    peer_id=event.message.peer_id,
                    random_id=get_random_id(),
                    message="Тест"
                )
    except Exception as e:
        print(e)