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99 lines (83 loc) · 2.7 KB
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<?php
namespace BookStack\References;
use BookStack\App\Model;
use BookStack\Entities\Queries\EntityQueries;
use BookStack\References\ModelResolvers\BookLinkModelResolver;
use BookStack\References\ModelResolvers\BookshelfLinkModelResolver;
use BookStack\References\ModelResolvers\ChapterLinkModelResolver;
use BookStack\References\ModelResolvers\CrossLinkModelResolver;
use BookStack\References\ModelResolvers\PageLinkModelResolver;
use BookStack\References\ModelResolvers\PagePermalinkModelResolver;
use BookStack\Util\HtmlDocument;
class CrossLinkParser
{
/**
* @var CrossLinkModelResolver[]
*/
protected array $modelResolvers;
public function __construct(array $modelResolvers)
{
$this->modelResolvers = $modelResolvers;
}
/**
* Extract any found models within the given HTML content.
*
* @return Model[]
*/
public function extractLinkedModels(string $html): array
{
$models = [];
$links = $this->getLinksFromContent($html);
foreach ($links as $link) {
$model = $this->linkToModel($link);
if (!is_null($model)) {
$models[get_class($model) . ':' . $model->id] = $model;
}
}
return array_values($models);
}
/**
* Get a list of href values from the given document.
*
* @return string[]
*/
protected function getLinksFromContent(string $html): array
{
$links = [];
$doc = new HtmlDocument($html);
$anchors = $doc->queryXPath('//a[@href]');
/** @var \DOMElement $anchor */
foreach ($anchors as $anchor) {
$links[] = $anchor->getAttribute('href');
}
return $links;
}
/**
* Attempt to resolve the given link to a model using the instance model resolvers.
*/
protected function linkToModel(string $link): ?Model
{
foreach ($this->modelResolvers as $resolver) {
$model = $resolver->resolve($link);
if (!is_null($model)) {
return $model;
}
}
return null;
}
/**
* Create a new instance with a pre-defined set of model resolvers, specifically for the
* default set of entities within BookStack.
*/
public static function createWithEntityResolvers(): self
{
$queries = app()->make(EntityQueries::class);
return new self([
new PagePermalinkModelResolver($queries->pages),
new PageLinkModelResolver($queries->pages),
new ChapterLinkModelResolver($queries->chapters),
new BookLinkModelResolver($queries->books),
new BookshelfLinkModelResolver($queries->shelves),
]);
}
}