vendor and env first commit

vendor/league/commonmark/src/Reference/ReferenceMap.php

@@ -0,0 +1,77 @@
+<?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);
+    }
+}