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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of the league/commonmark 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\Extension\Embed; |
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use League\CommonMark\Node\Block\Document; |
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use League\CommonMark\Parser\Block\BlockStart; |
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use League\CommonMark\Parser\Block\BlockStartParserInterface; |
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use League\CommonMark\Parser\Cursor; |
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use League\CommonMark\Parser\MarkdownParserStateInterface; |
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use League\CommonMark\Util\LinkParserHelper; |
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class EmbedStartParser implements BlockStartParserInterface |
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{ |
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public function tryStart(Cursor $cursor, MarkdownParserStateInterface $parserState): ?BlockStart |
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{ |
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if ($cursor->isIndented() || $parserState->getParagraphContent() !== null || ! ($parserState->getLastMatchedBlockParser()->getBlock() instanceof Document)) { |
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return BlockStart::none(); |
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} |
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// 0-3 leading spaces are okay |
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$cursor->advanceToNextNonSpaceOrTab(); |
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// The line must begin with "https://" |
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if (! str_starts_with($cursor->getRemainder(), 'https://')) { |
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return BlockStart::none(); |
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} |
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// A valid link must be found next |
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if (($dest = LinkParserHelper::parseLinkDestination($cursor)) === null) { |
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return BlockStart::none(); |
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} |
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// Skip any trailing whitespace |
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$cursor->advanceToNextNonSpaceOrTab(); |
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// We must be at the end of the line; otherwise, this link was not by itself |
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if (! $cursor->isAtEnd()) { |
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return BlockStart::none(); |
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} |
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return BlockStart::of(new EmbedParser($dest))->at($cursor); |
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} |
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} |
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thephpleague /
commonmark
