PushService::sendPushNotification

public function sendPushNotification(NotifyChat $chat, Message $message, int $counter = 0, bool $sendNotifyFlash = true): void
{
	if (!$this->isPullEnable())
	{
		return;
	}

	$toUserId = $chat->getAuthorId();

	$pullNotificationParams = $this->getFormatNotify($message, $counter);

	// We shouldn't send push, if it is disabled in notification settings.
	$needPush = CIMSettings::GetNotifyAccess(
		$toUserId,
		$message->getNotifyModule(),
		$message->getNotifyEvent(),
		CIMSettings::CLIENT_PUSH
	);

	if ($needPush)
	{
		// we prepare push params ONLY if there are no ADVANCED_PARAMS from outside.
		// If ADVANCED_PARAMS exists we must not change them.
		$pushParams = $message->getPushParams();
		if (isset($pushParams['ADVANCED_PARAMS']))
		{
			$advancedParams = $pushParams['ADVANCED_PARAMS'];
			unset($pushParams['ADVANCED_PARAMS']);
		}
		else
		{
			$advancedParams = $this->prepareAdvancedParamsForNotificationPush(
				$pullNotificationParams,
				$message->getPushMessage()
			);
		}

		BitrixPullPush::add(
			$toUserId,
			[
				'module_id' => $message->getNotifyModule(),
				'push' => [
					'type' => $message->getNotifyEvent(),
					'message' => $message->getPushMessage(),
					'params' => $message->getPushParams() ?? ['TAG' => 'IM_NOTIFY'],
					'advanced_params' => $advancedParams,
					'important' => ($this->sendingConfig->sendPushImmediately() ? 'Y': 'N'),
					'tag' => $message->getNotifyTag(),
					'sub_tag' => $message->getNotifySubTag(),
					'app_id' => $message->getPushAppId() ?? '',
				]
			]
		);
	}

	//($message->isNotifyFlash() ?? false),
	if ($sendNotifyFlash)
	{
		BitrixPullEvent::add(
			$toUserId,
			[
				'module_id' => 'im',
				'command' => 'notifyAdd',
				'params' => $pullNotificationParams,
				'extra' => BitrixImCommon::getPullExtra()
			]
		);
	}
}