SuffixDefinitions.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\Filesystem\Definitions;
 
final class SuffixDefinitions
{
    public const SEC = ".sec";
    protected array $white_list = [];
    protected array $black_list = [];
 
    public function __construct(array $white_list, array $black_list)
    {
        $this->white_list[] = '';
        $this->white_list = array_unique($white_list);
        $this->black_list = $black_list;
    }
 
    public function getWhiteList(): array
    {
        return $this->white_list;
    }
 
    public function getBlackList(): array
    {
        return $this->black_list;
    }
 
    public function getValidFileName(string $filename): string
    {
        if ($this->hasValidFileName($filename)) {
            return $filename;
        }
        $pi = pathinfo($filename);
        // if extension is not in white list, remove all "." and add ".sec" extension
        $basename = str_replace(".", "", $pi["basename"]);
        if (trim($basename) == "") {
            throw new \RuntimeException("Invalid upload filename.");
        }
        $basename .= self::SEC;
        if ($pi["dirname"] != "" && ($pi["dirname"] != "." || substr($filename, 0, 2) == "./")) {
            $filename = $pi["dirname"] . "/" . $basename;
        } else {
            $filename = $basename;
        }
        return $filename;
    }
 
    public function hasValidFileName(string $filename): bool
    {
        $pi = pathinfo($filename);
 
        return in_array(strtolower($pi["extension"]), $this->white_list)
            && !in_array(strtolower($pi["extension"]), $this->black_list);
    }
}