Support24::checkMembershipRestriction

static function checkMembershipRestriction(array $messageFields): bool
{
	return (
		// Standard network one-to-one conversation
		(
			$messageFields['MESSAGE_TYPE'] === IM_MESSAGE_PRIVATE
		)
		// allow conversation in specialized questioning chat
		|| (
			$messageFields['MESSAGE_TYPE'] === IM_MESSAGE_CHAT
			&& $messageFields['CHAT_ENTITY_TYPE'] === self::CHAT_ENTITY_TYPE
		)
		// allow support bot membership in the notification channel
		|| (
			$messageFields['MESSAGE_TYPE'] === IM_MESSAGE_CHAT
			&& $messageFields['CHAT_ENTITY_TYPE'] === BitrixImBotServiceNotifier::CHAT_ENTITY_TYPE
		)
	);
}