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<?php |
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/* |
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* This file is part of the league/commonmark-ext-autolink package. |
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* |
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* (c) Colin O'Dell <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace League\CommonMark\Ext\Autolink; |
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use League\CommonMark\Inline\Element\Link; |
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use League\CommonMark\Inline\Parser\InlineParserInterface; |
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use League\CommonMark\InlineParserContext; |
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final class InlineMentionParser implements InlineParserInterface |
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{ |
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/** @var string */ |
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private $linkPattern; |
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/** @var string */ |
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private $handleRegex; |
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/** |
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* @param string $linkPattern |
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* @param string $handleRegex |
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*/ |
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public function __construct($linkPattern, $handleRegex = '/^[A-Za-z0-9_]+(?!\w)/') |
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{ |
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$this->linkPattern = $linkPattern; |
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$this->handleRegex = $handleRegex; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getCharacters(): array |
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{ |
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return ['@']; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function parse(InlineParserContext $inlineContext): bool |
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{ |
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$cursor = $inlineContext->getCursor(); |
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// The @ symbol must not have any other characters immediately prior |
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$previousChar = $cursor->peek(-1); |
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if ($previousChar !== null && $previousChar !== ' ') { |
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// peek() doesn't modify the cursor, so no need to restore state first |
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return false; |
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} |
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// Save the cursor state in case we need to rewind and bail |
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$previousState = $cursor->saveState(); |
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// Advance past the @ symbol to keep parsing simpler |
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$cursor->advance(); |
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// Parse the handle |
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$handle = $cursor->match($this->handleRegex); |
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if (empty($handle)) { |
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// Regex failed to match; this isn't a valid Twitter handle |
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$cursor->restoreState($previousState); |
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return false; |
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} |
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$url = \sprintf($this->linkPattern, $handle); |
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$inlineContext->getContainer()->appendChild(new Link($url, '@' . $handle)); |
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return true; |
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} |
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public static function createTwitterHandleParser() |
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{ |
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return new self('https://twitter.com/%s', '/^[A-Za-z0-9_]{1,15}(?!\w)/'); |
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} |
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public static function createGithubHandleParser() |
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{ |
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// RegEx adapted from https://github.com/shinnn/github-username-regex/blob/master/index.js |
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return new self('https://www.github.com/%s', '/^[a-z\d](?:[a-z\d]|-(?=[a-z\d])){0,38}(?!\w)/'); |
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} |
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} |
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thephpleague /
commonmark-ext-autolink
