ExportFilename.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\Test\ExportImport;
 
class ExportFilename
{
    private ?string $path = null;
 
    public function __construct(
        private int $test_id
    ) {
    }
 
    public function getPathname(string $extension = '', string $additional = ''): string
    {
        if ($this->path !== null) {
            return $this->path;
        }
        if ($extension === '') {
            throw new \ilException('Missing file extension! Please pass a file extension of type string.');
        }
 
        if (substr_count($extension, '.') > 1 || (strpos($extension, '.') !== false && strpos($extension, '.') !== 0)) {
            throw new \ilException('Please use at most one dot in your file extension.');
        }
 
        if (strpos($extension, '.') === 0) {
            $extension = substr($extension, 1);
        }
 
        $corrected_additional = '_';
        if ($additional !== '') {
            if (strpos($additional, '__') === 0) {
                throw new ilException('The additional file part may not contain __ at the beginning!');
            }
 
            $corrected_additional = '__' . $additional . '_';
        }
 
        $this->path = \ilFileUtils::ilTempnam() . '__' . IL_INST_ID
            . $corrected_additional . $this->test_id . '.' . $extension;
        return $this->path;
    }
}