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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>
*
* Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
* - (c) John MacFarlane
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\CommonMark\Reference;
use League\CommonMark\Normalizer\TextNormalizer;
/**
* A collection of references, indexed by label
*/
final class ReferenceMap implements ReferenceMapInterface
{
/** @psalm-readonly */
private TextNormalizer $normalizer;
/**
* @var array<string, ReferenceInterface>
*
* @psalm-readonly-allow-private-mutation
*/
private array $references = [];
public function __construct()
{
$this->normalizer = new TextNormalizer();
}
public function add(ReferenceInterface $reference): void
{
// Normalize the key
$key = $this->normalizer->normalize($reference->getLabel());
// Store the reference
$this->references[$key] = $reference;
}
public function contains(string $label): bool
{
$label = $this->normalizer->normalize($label);
return isset($this->references[$label]);
}
public function get(string $label): ?ReferenceInterface
{
$label = $this->normalizer->normalize($label);
return $this->references[$label] ?? null;
}
/**
* @return \Traversable<string, ReferenceInterface>
*/
public function getIterator(): \Traversable
{
foreach ($this->references as $normalizedLabel => $reference) {
yield $normalizedLabel => $reference;
}
}
public function count(): int
{
return \count($this->references);
}
}
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