class.ilHtmlPurifierComposite.php

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<?php

declare(strict_types=1);

final class ilHtmlPurifierComposite implements ilHtmlPurifierInterface
{
    private array $purifiers = [];

    public function addPurifier(ilHtmlPurifierInterface $purifier): bool
    {
        if (!in_array($purifier, $this->purifiers, true)) {
            $this->purifiers[] = $purifier;
            return true;
        }

        return false;
    }

    public function removePurifier(ilHtmlPurifierInterface $purifier): bool
    {
        $key = array_search($purifier, $this->purifiers, true);
        if (false === $key) {
            return false;
        }
        unset($this->purifiers[$key]);

        return true;
    }

    public function purify(string $html): string
    {
        foreach ($this->purifiers as $purifier) {
            $html = $purifier->purify($html);
        }

        return $html;
    }

    public function purifyArray(array $htmlCollection): array
    {
        foreach ($htmlCollection as $key => $html) {
            if (!is_string($html)) {
                throw new InvalidArgumentException(sprintf(
                    'The element on index %s is not of type string: %s',
                    $key,
                    print_r($html, true)
                ));
            }
        }

        foreach ($htmlCollection as $key => $html) {
            foreach ($this->purifiers as $purifier) {
                $html = $purifier->purify($html);
            }

            $htmlCollection[$key] = $html;
        }

        return $htmlCollection;
    }
}