AccessQuestionImage.php

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<?php

declare(strict_types=1);

namespace ILIAS\Modules\Test;

use ILIAS\Data\Result;
use ILIAS\Data\Result\Ok;
use ILIAS\Data\Result\Error;

class AccessQuestionImage implements SimpleAccess
{
    private Readable $readable;

    public function __construct(Readable $readable)
    {
        $this->readable = $readable;
    }

    public function isPermitted(string $path): Result
    {
        $object_id = $this->objectId($path);
        if (!$object_id) {
            return new Error('Not a question image path of test questions.');
        }

        return new Ok($this->readable->objectId($object_id));
    }

    private function objectId(string $path): ?int
    {
        $results = [];
        if (!preg_match(':/assessment/(\d+)/(\d+)/images/([^/]+)$:', $path, $results)) {
            return null;
        }

        return (int) $results[1];
    }
}