user.php

<?php
 
namespace Bitrix\Socialnetwork\Helper;
 
use Bitrix\Main\ModuleManager;
use Bitrix\Main\UserTable;
 
class User
{
    protected static string $userTableClass = UserTable::class;
 
    public static function getCurrentUserId(): int
    {
        global $USER;
 
        return (int)$USER->getId();
    }
 
    public static function getUserListNameFormatted(array $userIdList = [], $params = []): array
    {
        static $cache = [];
 
        $nameFormat = ($params['nameFormat'] ?? \CSite::getNameFormat());
 
        $result = [];
 
        $userIdList = array_map(static function ($userId) {
            return (int)$userId;
        }, $userIdList);
 
        $userIdList = array_filter($userIdList, static function ($userId) {
            return $userId > 0;
        });
 
        $userIdList = array_unique($userIdList);
 
        if (empty($userIdList))
        {
            return $result;
        }
 
        if (!isset($cache[$nameFormat]))
        {
            $cache[$nameFormat] = [];
        }
 
        $result = array_filter($cache[$nameFormat], function($cacheItem, $userId) use ($userIdList) {
            return in_array($userId, $userIdList);
        }, ARRAY_FILTER_USE_BOTH);
 
        $userIdListToGet = array_diff($userIdList, array_keys($cache[$nameFormat]));
        if (!empty($userIdListToGet))
        {
            $res = self::$userTableClass::getList([
                'filter' => [
                    '@ID' => $userIdListToGet,
                ],
                'select' => [
                    'ID',
                    'LOGIN',
                    'EMAIL',
                    'NAME',
                    'SECOND_NAME',
                    'LAST_NAME',
                ],
            ]);
 
            $useLogin = ModuleManager::isModuleInstalled('intranet');
 
            while ($userFields = $res->fetch())
            {
                $value = \CUser::FormatName($nameFormat, $userFields, $useLogin, false);
                $result[(int)$userFields['ID']] = $value;
                $cache[$nameFormat][(int)$userFields['ID']] = $value;
            }
        }
 
        return $result;
    }
}