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<?php |
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/* |
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* This file is part of the league/commonmark-extras package. |
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* |
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* (c) Colin O'Dell <[email protected]> |
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* |
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* Original code based on the CommonMark JS reference parser (http://bitly.com/commonmark-js) |
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* - (c) John MacFarlane |
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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\Extras\TwitterHandleAutolink; |
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use League\CommonMark\Inline\Element\Link; |
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use League\CommonMark\Inline\Parser\AbstractInlineParser; |
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use League\CommonMark\InlineParserContext; |
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class TwitterHandleParser extends AbstractInlineParser |
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{ |
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public function getCharacters() { |
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return ['@']; |
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} |
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public function parse(InlineParserContext $inlineContext) { |
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$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 = $cursor->match('/^[A-Za-z0-9_]{1,15}(?!\w)/'); |
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if (empty($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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$profileUrl = 'https://twitter.com/' . $handle; |
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$inlineContext->getContainer()->appendChild(new Link($profileUrl, '@'.$handle)); |
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return true; |
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} |
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} |
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thephpleague /
commonmark-extras
