backupscript/src/Template/TwigExtension.php

<?php

declare(strict_types=1);

namespace App\Template;

use Symfony\Component\DependencyInjection\ContainerInterface;
use Twig\Extension\AbstractExtension;
use Twig\TwigFilter;

/**
 * Twig extension
 *
 * Additional formatters for templates
 */
final class TwigExtension extends AbstractExtension
{
    /**
     * Extend the filters
     *
     * @return TwigFilter[]
     */
    #[\Override]
    public function getFilters(): array
    {
        return [
            new TwigFilter('formatBytes', [$this, 'formatBytes']),
        ];
    }

    /**
     * Format a file size to be human readable
     *
     * @param int $bytes     Number of bytes
     * @param int $precision Precision
     *
     * @return string Formatted string
     */
    public function formatBytes($bytes, $precision = 2)
    {
        $size = ['B','kB','MB','GB','TB','PB','EB','ZB','YB'];
        $fact = (int)floor((strlen((string)$bytes) - 1) / 3);
        return sprintf("%.{$precision}f", $bytes / pow(1024, $fact)) . $size[$fact];
    }
}