Upload folder structure

<?php

define('sugarEntry', true);
define('ENTRY_POINT_TYPE', 'api');

require_once 'include/entryPoint.php';

$logger = LoggerManager::getLogger();

$sapi_type = php_sapi_name();
if (substr($sapi_type, 0, 3) != 'cli') {
    $logger->fatal('Invalid Call to CLI script');
    exit(1);
}
$GLOBALS['current_user'] = BeanFactory::getBean('Users', 1);
global $db, $timedate;

writeLog("-----------------------------------------------");
writeLog("Start " . date('Y-m-d h:i:s'));
writeLog("-----------------------------------------------");



function run()
{
    $uploadDir = UploadStream::getDir();
    $dir = opendir($uploadDir);
    if (!$dir) {
        writeLog("Cannot open upload directory");
        return;
    }
    $total = 0;
    while (($file = readdir($dir)) !== false) {
        $pathFrom = $uploadDir . DIRECTORY_SEPARATOR . $file;
        if (!is_guid($file) || !is_file($pathFrom)) {
            continue;
        }
        $subdirName = makeDirName($file);
        $nameTo = $subdirName . DIRECTORY_SEPARATOR . $file;
        sugar_mkdir($uploadDir . DIRECTORY_SEPARATOR . $subdirName);
        sugar_rename($pathFrom, $uploadDir . DIRECTORY_SEPARATOR . $nameTo);
        $total++;
        if ($total % 1000 === 0) {
            writeLog("Moved {$file} to {$nameTo}, processed {$total} files");
        }
    }
    writeLog("Done, processed {$total} files");
    closedir($dir);
}

function makeDirName($filename)
{
    return substr($filename, 5, 3);
}



run();


writeLog("-----------------------------------------------");
writeLog("End " . date('Y-m-d h:i:s'));
writeLog("-----------------------------------------------");

/**
 * Writing the message
 */
function writeLog($message)
{
    $logger = LoggerManager::getLogger();
    echo $message;
    echo PHP_EOL; 
    $logger->fatal($message);
}