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Filename : FileManagerLogic.php
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<?php

namespace App\Utils;

use Exception;

class FileManagerLogic
{
    public static function getFileSize($path): string
    {
        if (!is_null($path)) {
            try {
                $headers = get_headers($path, 1);
                $decimals = 2;
                $bytes = isset($headers['Content-Length']) ? $headers['Content-Length'] : $headers['content-length'];
                $size = ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
                $factor = floor((strlen($bytes) - 1) / 3);
                return sprintf("%.{$decimals}f", $bytes / (1024 ** $factor)) . @$size[$factor];
            } catch (Exception $exception) {
            }

            try {
                $ch = curl_init($path);
                curl_setopt($ch, CURLOPT_NOBODY, true);
                curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
                curl_setopt($ch, CURLOPT_HEADER, true);
                curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); // Follow redirects if necessary
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // Ignore SSL verification if needed
                curl_exec($ch);

                $contentLength = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);
                curl_close($ch);

                if ($contentLength <= 0) {
                    return 'Unknown Size';
                }

                $decimals = 2;
                $sizeUnits = ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
                $factor = floor((strlen($contentLength) - 1) / 3);

                return sprintf("%.{$decimals}f", $contentLength / (1024 ** $factor)) . ' ' . $sizeUnits[$factor];
            } catch (Exception $exception) {
                return 'Error: ' . $exception->getMessage();
            }
        }
        return 'Invalid File';
    }

    public static function formatBytes($bytes, $precision = 2): string
    {
        $units = ['B', 'KB', 'MB', 'GB', 'TB'];
        $bytes = max($bytes, 0);
        $pow = floor(($bytes ? log($bytes) : 0) / log(1024));
        $pow = min($pow, count($units) - 1);
        return round($bytes / pow(1024, $pow), $precision) . ' ' . $units[$pow];
    }
}