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<?php
namespace Drupal\linkit\Plugin\Filter;
use Drupal\Component\Utility\Html;
use Drupal\Core\Entity\EntityRepositoryInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\filter\FilterProcessResult;
use Drupal\filter\Plugin\FilterBase;
use Drupal\linkit\SubstitutionManagerInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
/**
* Provides a Linkit filter.
*
* Note this must run before any Xss::filter() calls, because that strips
* disallowed protocols. That effectively means this must run before the
* \Drupal\filter\Plugin\Filter\FilterHtml filter. Hence the very low weight.
*
* @Filter(
* id = "linkit",
* title = @Translation("Linkit filter"),
* description = @Translation("Updates content links inserted by Linkit to point to the current URL alias, and have the current title."),
* settings = {
* "title" = TRUE,
* },
* type = Drupal\filter\Plugin\FilterInterface::TYPE_TRANSFORM_REVERSIBLE,
* weight = -15,
* )
*/
class LinkitFilter extends FilterBase implements ContainerFactoryPluginInterface {
/**
* The entity repository.
*
* @var \Drupal\Core\Entity\EntityRepositoryInterface
*/
protected $entityRepository;
/**
* The substitution manager.
*
* @var \Drupal\linkit\SubstitutionManagerInterface
*/
protected $substitutionManager;
/**
* Constructs a LinkitFilter object.
*
* @param array $configuration
* A configuration array containing information about the plugin instance.
* @param string $plugin_id
* The plugin_id for the plugin instance.
* @param mixed $plugin_definition
* The plugin implementation definition.
* @param \Drupal\Core\Entity\EntityRepositoryInterface $entity_repository
* The entity repository service.
*/
public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityRepositoryInterface $entity_repository, SubstitutionManagerInterface $substitution_manager) {
parent::__construct($configuration, $plugin_id, $plugin_definition);
$this->entityRepository = $entity_repository;
$this->substitutionManager = $substitution_manager;
}
/**
* {@inheritdoc}
*/
public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
return new static(
$configuration,
$plugin_id,
$plugin_definition,
$container->get('entity.repository'),
$container->get('plugin.manager.linkit.substitution')
);
}
/**
* {@inheritdoc}
*/
public function process($text, $langcode) {
$result = new FilterProcessResult($text);
if (strpos($text, 'data-entity-type') !== FALSE && strpos($text, 'data-entity-uuid') !== FALSE) {
$dom = Html::load($text);
$xpath = new \DOMXPath($dom);
foreach ($xpath->query('//a[@data-entity-type and @data-entity-uuid]') as $element) {
/** @var \DOMElement $element */
try {
// Load the appropriate translation of the linked entity.
$entity_type = $element->getAttribute('data-entity-type');
$uuid = $element->getAttribute('data-entity-uuid');
// Make the substitution optional, for backwards compatibility,
// maintaining the previous hard-coded direct file link assumptions,
// for content created before the substitution feature.
if (!$substitution_type = $element->getAttribute('data-entity-substitution')) {
$substitution_type = $entity_type === 'file' ? 'file' : SubstitutionManagerInterface::DEFAULT_SUBSTITUTION;
}
$entity = $this->entityRepository->loadEntityByUuid($entity_type, $uuid);
if ($entity) {
$entity = $this->entityRepository->getTranslationFromContext($entity, $langcode);
/** @var \Drupal\Core\GeneratedUrl $url */
$url = $this->substitutionManager
->createInstance($substitution_type)
->getUrl($entity);
$element->setAttribute('href', $url->getGeneratedUrl());
$access = $entity->access('view', NULL, TRUE);
// Set the appropriate title attribute.
if ($this->settings['title'] && !$access->isForbidden() && !$element->getAttribute('title')) {
$element->setAttribute('title', $entity->label());
}
// The processed text now depends on:
$result
->addCacheableDependency($access)
// - the generated URL (which has undergone path & route
// processing)
->addCacheableDependency($url)
// - the linked entity (whose URL and title may change)
->addCacheableDependency($entity);
}
}
watchdog_exception('linkit_filter', $e);
}
}
return $result;
}
/**
* {@inheritdoc}
*/
public function settingsForm(array $form, FormStateInterface $form_state) {
$form['title'] = [
'#type' => 'checkbox',
'#title' => $this->t('Automatically set the <code>title</code> attribute to that of the (translated) referenced content'),
'#default_value' => $this->settings['title'],
Emil Stjerneman
committed
'#attached' => [
'library' => ['linkit/linkit.filter_html.admin'],
],