Issue #2873480: Facet Summary for Facet Items with a set dependency

src/Plugin/facets/url_processor/QueryString.php

@@ -9,6 +9,7 @@ use Drupal\facets\Event\ActiveFiltersParsed;
 use Drupal\facets\Event\QueryStringCreated;
 use Drupal\facets\Event\UrlCreated;
 use Drupal\facets\FacetInterface;
+use Drupal\facets\FacetManager\DefaultFacetManager;
 use Drupal\facets\UrlProcessor\UrlProcessorPluginBase;
 use Drupal\facets\Utility\FacetsUrlGenerator;
 use Symfony\Component\DependencyInjection\ContainerInterface;
@@ -49,14 +50,22 @@ class QueryString extends UrlProcessorPluginBase {
    */
   protected $urlGenerator;
 
+  /**
+   * The default Facet manager.
+   *
+   * @var \Drupal\facets\FacetManager\DefaultFacetManager
+   */
+  private $facetManager;
+
   /**
    * {@inheritdoc}
    */
-  public function __construct(array $configuration, $plugin_id, $plugin_definition, Request $request, EntityTypeManagerInterface $entity_type_manager, EventDispatcherInterface $eventDispatcher, FacetsUrlGenerator $urlGenerator) {
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, Request $request, EntityTypeManagerInterface $entity_type_manager, EventDispatcherInterface $eventDispatcher, FacetsUrlGenerator $urlGenerator, DefaultFacetManager $facet_manager) {
     parent::__construct($configuration, $plugin_id, $plugin_definition, $request, $entity_type_manager);
     $this->eventDispatcher = $eventDispatcher;
     $this->urlGenerator = $urlGenerator;
     $this->initializeActiveFilters();
+    $this->facetManager = $facet_manager;
   }
 
   /**
@@ -70,7 +79,8 @@ class QueryString extends UrlProcessorPluginBase {
       $container->get('request_stack')->getCurrentRequest(),
       $container->get('entity_type.manager'),
       $container->get('event_dispatcher'),
-      $container->get('facets.utility.url_generator')
+      $container->get('facets.utility.url_generator'),
+      $container->get('facets.manager')
     );
   }
 
@@ -112,6 +122,22 @@ class QueryString extends UrlProcessorPluginBase {
       }
     }
 
+    // Get dependent facets that have to be removed with active values.
+    $dependent_facets_aliases = [];
+    $this->facetManager->processFacets($facet->getFacetSourceId());
+    $facets = $this->facetManager->getFacetsByFacetSourceId($facet->getFacetSourceId());
+    foreach ($facets as $other_facet) {
+      $config = $other_facet->getProcessorConfigs();
+      if (empty($config['dependent_processor']['settings'][$facet->id()]['enable'])) {
+        continue;
+      }
+      /* @var \Drupal\facets\Plugin\facets\processor\DependentFacetProcessor $dependent_processor */
+      $dependent_processor = $other_facet->getProcessors()['dependent_processor'];
+      if ($dependent_processor->isConditionMet($config['dependent_processor']['settings'][$facet->id()], $facet)) {
+        $dependent_facets_aliases[] = $other_facet->getUrlAlias();
+      }
+    }
+
     /** @var \Drupal\facets\Result\ResultInterface[] $results */
     foreach ($results as &$result) {
       // Reset the URL for each result.
@@ -143,6 +169,12 @@ class QueryString extends UrlProcessorPluginBase {
           if ($filter_param === $filter_string || ($filter_missing && str_starts_with($filter_param, $filter_missing))) {
             unset($filter_params[$key]);
           }
+
+          // Also remove dependent facets.
+          $filter_key = explode($this->getSeparator(), $filter_param);
+          if (in_array($filter_key[0], $dependent_facets_aliases)) {
+            unset($filter_params[$key]);
+          }
         }
         if ($facet->getUseHierarchy() && !$result->isMissing()) {
           $id = $result->getRawValue();