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