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<?php
declare(strict_types=1);
/*
* This file is part of the league/commonmark package.
*
* (c) Colin O'Dell <colinodell@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\CommonMark\Normalizer;
use League\Config\ConfigurationAwareInterface;
use League\Config\ConfigurationInterface;
/**
* Creates URL-friendly strings based on the given string input
*/
final class SlugNormalizer implements TextNormalizerInterface, ConfigurationAwareInterface
{
/** @psalm-allow-private-mutation */
private int $defaultMaxLength = 255;
public function setConfiguration(ConfigurationInterface $configuration): void
{
$this->defaultMaxLength = $configuration->get('slug_normalizer/max_length');
}
/**
* {@inheritDoc}
*
* @psalm-immutable
*/
public function normalize(string $text, array $context = []): string
{
// Add any requested prefix
$slug = ($context['prefix'] ?? '') . $text;
// Trim whitespace
$slug = \trim($slug);
// Convert to lowercase
$slug = \mb_strtolower($slug, 'UTF-8');
// Try replacing whitespace with a dash
$slug = \preg_replace('/\s+/u', '-', $slug) ?? $slug;
// Try removing characters other than letters, numbers, and marks.
$slug = \preg_replace('/[^\p{L}\p{Nd}\p{Nl}\p{M}-]+/u', '', $slug) ?? $slug;
// Trim to requested length if given
if ($length = $context['length'] ?? $this->defaultMaxLength) {
$slug = \mb_substr($slug, 0, $length, 'UTF-8');
}
return $slug;
}
}
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