trait.ilObjFileSecureString.php

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<?php

use ILIAS\ResourceStorage\Preloader\SecureString;

trait ilObjFileSecureString
{
    use SecureString;

    protected function extractSuffixFromFilename(string $filename): string
    {
        if (!preg_match('/^(.+?)(?<!\s)\.([^.]*$|$)/', $filename, $matches)) {
            return '';
        }
        return $this->secure($matches[2]);
    }

    protected function stripSuffix(string $title, ?string $suffix = null): string
    {
        $suffix = $suffix ?? $this->extractSuffixFromFilename($title);

        if ($suffix !== null && ($length = strrpos($title, "." . $suffix)) > 0) {
            $title = substr($title, 0, $length);
        }

        return $this->secure($title);
    }

    protected function ensureSuffix(string $title, ?string $suffix = null): string
    {
        $title = $this->stripSuffix($title, $suffix);
        $suffix = $suffix ?? $this->extractSuffixFromFilename($title);

        if ($suffix !== null && strrpos($title, "." . $suffix) === false) {
            $title .= "." . $suffix;
        }

        return $this->secure(rtrim($title, "."));
    }

    protected function ensureSuffixInBrackets(string $title, ?string $suffix = null): string
    {
        $title = $this->stripSuffix($title, $suffix);
        $suffix = $suffix ?? $this->extractSuffixFromFilename($title);

        if ($suffix !== null && strrpos($title, "." . $suffix) === false) {
            $title .= " (" . $suffix . ")";
        }

        return $this->secure($title);
    }
}