util.php

<?php
 
namespace Bitrix\Im\Call;
 
class Util
{
    public static function getUsers(array $idList)
    {
        $result = [];
        foreach ($idList as $userId)
        {
            $result[$userId] = \Bitrix\Im\User::getInstance($userId)->getArray(['JSON' => 'Y', 'HR_PHOTO' => true]);
        }
 
        return $result;
    }
 
    public static function generateUUID()
    {
        if (function_exists('random_bytes'))
        {
            $data = random_bytes(16);
        }
        elseif (function_exists('openssl_random_pseudo_bytes'))
        {
            $data = openssl_random_pseudo_bytes(16);
        } else
        {
            $data = uniqid('', true);
        }
 
        // set version to 4
        $data[6] = chr(ord($data[6]) & 0x0f | 0x40);
 
        // set bits 6-7 to 10
        $data[8] = chr(ord($data[8]) & 0x3f | 0x80);
 
        return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
    }
}