message.php

См. документацию.

<?php declare(strict_types=1);
 
namespace Bitrix\Im\Services;
 
use Bitrix\Main;

class Message
{
    private $isEnabled;
 
    public function __construct()
    {
        $this->isEnabled = \Bitrix\Main\Loader::includeModule('im');
    }

    public function getMessage(int $messageId): ?array
    {
        if ($this->isEnabled)
        {
            return \CIMMessenger::GetById($messageId) ?: null;
        }
 
        return null;
    }
}