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<?php
declare(strict_types=1);
namespace App\Twig\Extension;
use App\Helper\StringHelper;
use Twig\Attribute\AsTwigFilter;
use function Symfony\Component\String\u;
final readonly class MarkdownExtension
{
public function __construct(
private StringHelper $stringHelper,
) {
}
/**
* Add the missing anchors on demo website homepage displaying the Github README.
*
* @see https://microsymfony.ovh
* @see https://github.com/strangebuzz/MicroSymfony/blob/main/README.md?plain=1
*/
#[AsTwigFilter('add_headers_anchors')]
public function addHeadersAnchors(string $html): string
$dom = new \DOMDocument();
$dom->loadHTML(mb_encode_numericentity($html, [0x80, 0x10FFFF, 0, ~0], 'UTF-8'), \LIBXML_HTML_NOIMPLIED | \LIBXML_HTML_NODEFDTD);
// Allow to have the same "buggy" anchors as GitHub
/** @var \DOMNodeList<\DOMNode> $tags */
$tags = (new \DOMXPath($dom))->query('//h2 | //h3');
foreach ($tags as $headerTag) {
$slug = $this->stringHelper->slugify($headerTag->textContent);
/** @var \DOMElement $headerTag */
$headerTag->setAttribute('id', $slug.(u($slug)->length() !== u($headerTag->textContent)->length() ? '-' : '')); // add "-" when we have a final Emoji.
return (string) $dom->saveHTML();
strangebuzz /
MicroSymfony
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