file.php

<?php
 
namespace Bitrix\Socialnetwork\Integration\Main;
 
class File
{
    public static function getFileSource(
        int $fileId,
        int $width = 50,
        int $height = 50,
        bool $immediate = false
    ): string
    {
        if ($fileId <= 0)
        {
            return '';
        }
 
        if ($file = \CFile::GetFileArray($fileId))
        {
            $fileInfo = \CFile::ResizeImageGet(
                $file,
                [
                    'width' => $width,
                    'height' => $height,
                ],
                BX_RESIZE_IMAGE_EXACT,
                false,
                false,
                $immediate
            );
 
            return $fileInfo['src'];
        }
 
        return '';
    }
 
    public static function getFilesSources(
        array $fileIds,
        int $width = 50,
        int $height = 50,
        bool $immediate = false
    ): array
    {
        if (empty($fileIds))
        {
            return [];
        }
 
        $filesSources = array_fill_keys($fileIds, '');
 
        $res = \CFile::GetList([], ['@ID' => implode(',', $fileIds)]);
        while ($file = $res->Fetch())
        {
            $fileInfo = \CFile::ResizeImageGet(
                $file,
                [
                    'width' => $width,
                    'height' => $height,
                ],
                BX_RESIZE_IMAGE_EXACT,
                false,
                false,
                $immediate
            );
 
            $filesSources[$file['ID']] = $fileInfo['src'];
        }
 
        return $filesSources;
    }
}