1 files changed, 91 insertions, 0 deletions
diff --git a/vendor/league/commonmark/src/Extension/Mention/MentionParser.php b/vendor/league/commonmark/src/Extension/Mention/MentionParser.php
new file mode 100644
index 0000000000..7609184f7b
--- /dev/null
+++ b/vendor/league/commonmark/src/Extension/Mention/MentionParser.php
@@ -0,0 +1,91 @@
+<?php
+
+/*
+ * 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\Extension\Mention;
+
+use League\CommonMark\Extension\Mention\Generator\CallbackGenerator;
+use League\CommonMark\Extension\Mention\Generator\MentionGeneratorInterface;
+use League\CommonMark\Extension\Mention\Generator\StringTemplateLinkGenerator;
+use League\CommonMark\Inline\Parser\InlineParserInterface;
+use League\CommonMark\InlineParserContext;
+
+final class MentionParser implements InlineParserInterface
+{
+    /** @var string */
+    private $symbol;
+
+    /** @var string */
+    private $mentionRegex;
+
+    /** @var MentionGeneratorInterface */
+    private $mentionGenerator;
+
+    public function __construct(string $symbol, string $mentionRegex, MentionGeneratorInterface $mentionGenerator)
+    {
+        $this->symbol = $symbol;
+        $this->mentionRegex = $mentionRegex;
+        $this->mentionGenerator = $mentionGenerator;
+    }
+
+    public function getCharacters(): array
+    {
+        return [$this->symbol];
+    }
+
+    public function parse(InlineParserContext $inlineContext): bool
+    {
+        $cursor = $inlineContext->getCursor();
+
+        // The symbol must not have any other characters immediately prior
+        $previousChar = $cursor->peek(-1);
+        if ($previousChar !== null && $previousChar !== ' ') {
+            // peek() doesn't modify the cursor, so no need to restore state first
+            return false;
+        }
+
+        // Save the cursor state in case we need to rewind and bail
+        $previousState = $cursor->saveState();
+
+        // Advance past the symbol to keep parsing simpler
+        $cursor->advance();
+
+        // Parse the mention match value
+        $identifier = $cursor->match($this->mentionRegex);
+        if ($identifier === null) {
+            // Regex failed to match; this isn't a valid mention
+            $cursor->restoreState($previousState);
+
+            return false;
+        }
+
+        $mention = $this->mentionGenerator->generateMention(new Mention($this->symbol, $identifier));
+
+        if ($mention === null) {
+            $cursor->restoreState($previousState);
+
+            return false;
+        }
+
+        $inlineContext->getContainer()->appendChild($mention);
+
+        return true;
+    }
+
+    public static function createWithStringTemplate(string $symbol, string $mentionRegex, string $urlTemplate): MentionParser
+    {
+        return new self($symbol, $mentionRegex, new StringTemplateLinkGenerator($urlTemplate));
+    }
+
+    public static function createWithCallback(string $symbol, string $mentionRegex, callable $callback): MentionParser
+    {
+        return new self($symbol, $mentionRegex, new CallbackGenerator($callback));
+    }
+}