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<?php |
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namespace Pageon\Lib; |
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use Pageon\Html\Image\ImageFactory; |
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use \Parsedown as LibParsedown; |
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use Stitcher\Exception\InvalidConfiguration; |
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use Symfony\Component\Filesystem\Exception\FileNotFoundException; |
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/** |
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* This class adds extensions to the Parsedown library: |
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* |
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* - Code block classes. |
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* - External links with `target="_blank"`. |
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* - Images are parsed with with the image factory |
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* |
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* Class Parsedown |
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*/ |
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class Parsedown extends LibParsedown |
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{ |
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private $imageFactory; |
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public function __construct(ImageFactory $imageFactory) { |
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$this->imageFactory = $imageFactory; |
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} |
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protected function element(array $Element) { |
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$markup = parent::element($Element); |
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if (isset($Element['attributes']['href']) && strpos($Element['attributes']['href'], '*') === 0) { |
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return $this->parseBlankLink($Element); |
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} |
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if (isset($Element['attributes']['srcset'])) { |
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return $this->parseImageWithSrcset($Element); |
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} |
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return $markup; |
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} |
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protected function blockFencedCode($Line) { |
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$block = parent::blockFencedCode($Line); |
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if (isset($block['element']['text']['attributes']['class'])) { |
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$block['element']['attributes']['class'] = $block['element']['text']['attributes']['class']; |
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} |
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return $block; |
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} |
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protected function inlineImage($Excerpt) { |
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$Inline = parent::inlineImage($Excerpt); |
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if (!isset($Inline['element']['attributes']['src'])) { |
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return $Inline; |
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} |
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$src = $Inline['element']['attributes']['src']; |
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try { |
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$responsiveImage = $this->imageFactory->create($src); |
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} catch (FileNotFoundException $e) { |
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throw InvalidConfiguration::fileNotFound($src); |
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} |
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$Inline['element']['attributes']['srcset'] = $responsiveImage->srcset() ?? null; |
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$Inline['element']['attributes']['sizes'] = $responsiveImage->sizes() ?? null; |
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$Inline['element']['attributes']['alt'] = $Inline['element']['attributes']['alt'] ?? null; |
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return $Inline; |
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} |
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private function parseBlankLink($Element): string { |
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$href = $Element['attributes']['href']; |
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$href = substr($href, 1); |
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return "<a href='$href' target='_blank' rel='noreferrer noopener'>{$Element['text']}</a>"; |
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} |
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private function parseImageWithSrcset($Element): string { |
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$src = $Element['attributes']['src']; |
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$srcset = $Element['attributes']['srcset']; |
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$sizes = $Element['attributes']['sizes']; |
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$alt = $Element['attributes']['alt']; |
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return "<img src=\"{$src}\" srcset=\"{$srcset}\" sizes=\"{$sizes}\" alt=\"{$alt}\" />"; |
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} |
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} |
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pageon /
stitcher-core
