73 lines
2.0 KiB
PHP
73 lines
2.0 KiB
PHP
<?php
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declare(strict_types=1);
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namespace LogseqGem;
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use League\CommonMark\Node\Inline\Text;
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use League\CommonMark\Extension\CommonMark\Node\Inline\Link;
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use League\CommonMark\Extension\CommonMark\Node\Block\ListBlock;
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class ArticleParser extends Parser {
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private ?array $properties;
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public function convert(): string {
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$gemtext = [];
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$this->properties = [];
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$in_frontmatter = true;
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$walker = $this->document->walker();
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while ($event = $walker->next()) {
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$entering = $event->isEntering();
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$node = $event->getNode();
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if ($entering && $node instanceof ListBlock) {
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$in_frontmatter = false;
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continue;
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}
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if ($entering && $node instanceof Text) {
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$text = $node->getLiteral();
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if ($in_frontmatter) {
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if (preg_match('/^([A-Za-z-]+):: (.*)/', $text, $matches)) {
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$this->properties[$matches[1]] = $matches[2];
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continue;
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} else {
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$in_frontmatter = false;
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}
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}
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$gemtext[] = $text;
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continue;
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}
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if ($entering && $node instanceof Link) {
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$label = $walker->next()->getNode();
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if (!$label instanceof Text) {
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throw new \Exception('Expected next node in Link to be Text, got ' . get_class($label));
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}
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$gemtext[] = sprintf('=> %s %s', $node->getUrl(), $label->getLiteral());
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continue;
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}
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}
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return implode("\n\n", $gemtext);
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}
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public function getProperties(): array {
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if (is_null($this->properties)) {
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throw new \Exception("Cannot get properties before converting a document");
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}
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return $this->properties;
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}
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public function isPublished(): bool {
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return (($this->getProperties()['status'] ?? '') === 'published');
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}
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}
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