Viewing file:  UniqueSlugNormalizer.php (1.46 KB) -rw-r--r--
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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;
// phpcs:disable Squiz.Strings.DoubleQuoteUsage.ContainsVar
final class UniqueSlugNormalizer implements UniqueSlugNormalizerInterface
{
private TextNormalizerInterface $innerNormalizer;
/** @var array<string, bool> */
private array $alreadyUsed = [];
public function __construct(TextNormalizerInterface $innerNormalizer)
{
$this->innerNormalizer = $innerNormalizer;
}
public function clearHistory(): void
{
$this->alreadyUsed = [];
}
/**
* {@inheritDoc}
*
* @psalm-allow-private-mutation
*/
public function normalize(string $text, array $context = []): string
{
$normalized = $this->innerNormalizer->normalize($text, $context);
// If it's not unique, add an incremental number to the end until we get a unique version
if (\array_key_exists($normalized, $this->alreadyUsed)) {
$suffix = 0;
do {
++$suffix;
} while (\array_key_exists("$normalized-$suffix", $this->alreadyUsed));
$normalized = "$normalized-$suffix";
}
$this->alreadyUsed[$normalized] = true;
return $normalized;
}
}
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