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<?php |
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/* |
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* This file is a part of Sculpin. |
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* |
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* (c) Dragonfly Development Inc. |
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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 Symplify\PHP7_Sculpin\MarkdownBundle; |
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use Michelf\MarkdownExtra; |
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use Symplify\PHP7_Sculpin\Converter\SourceConverterContext; |
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use Symplify\PHP7_Sculpin\Converter\ConverterInterface; |
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final class MarkdownConverter implements ConverterInterface |
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{ |
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/** |
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* @var string |
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*/ |
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const NAME = 'markdown'; |
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/** |
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* @var MarkdownExtra |
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*/ |
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private $markdown; |
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public function __construct(MarkdownExtra $markdown) |
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{ |
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$this->markdown = $markdown; |
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$this->markdown->header_id_func = [$this, 'generateHeaderId']; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function convert(SourceConverterContext $converterContext) |
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{ |
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$converterContext->setContent( |
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$this->markdown->transform( |
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$converterContext->content() |
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) |
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); |
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} |
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/** |
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* This method is called to generate an id="" attribute for a header. |
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*/ |
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public function generateHeaderId(string $headerText) : string |
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{ |
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// $headerText is completely raw markdown input. We need to strip it |
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// from all markup, because we are only interested in the actual 'text' |
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// part of it. |
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// Step 1: Remove html tags. |
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$result = strip_tags($headerText); |
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// Step 2: Remove all markdown links. To do this, we simply remove |
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// everything between ( and ) if the ( occurs right after a ]. |
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$result = preg_replace('% |
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(?<= \\]) # Look behind to find ] |
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( |
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\\( # match ( |
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[^\\)]* # match everything except ) |
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\\) # match ) |
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) |
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%x', '', $result); |
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// Step 3: Convert spaces to dashes, and remove unwanted special |
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// characters. |
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$map = [ |
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' ' => '-', |
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'(' => '', |
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')' => '', |
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'[' => '', |
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']' => '', |
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]; |
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return rawurlencode(strtolower( |
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strtr($result, $map) |
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)); |
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} |
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} |
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Symplify /
PHP7_Sculpin
