OP-7: Add facets to search form

src/Form/Type/ShopProductsFilterType.php

@@ -10,16 +10,48 @@ declare(strict_types=1);
 
 namespace BitBag\SyliusElasticsearchPlugin\Form\Type;
 
+use BitBag\SyliusElasticsearchPlugin\Controller\RequestDataHandler\DataHandlerInterface;
+use BitBag\SyliusElasticsearchPlugin\Facet\RegistryInterface;
+use BitBag\SyliusElasticsearchPlugin\QueryBuilder\QueryBuilderInterface;
+use FOS\ElasticaBundle\Finder\PaginatedFinderInterface;
 use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\Form\FormEvent;
+use Symfony\Component\Form\FormEvents;
+use Symfony\Component\Form\FormInterface;
+use Pagerfanta\Adapter\AdapterInterface;
+use FOS\ElasticaBundle\Paginator\FantaPaginatorAdapter;
+use Elastica\Query;
+use Symfony\Component\OptionsResolver\OptionsResolver;
 
 final class ShopProductsFilterType extends AbstractFilterType
 {
     /** @var string */
     private $namePropertyPrefix;
 
-    public function __construct(string $namePropertyPrefix)
-    {
+    /** @var PaginatedFinderInterface */
+    private $finder;
+
+    /** @var RegistryInterface */
+    private $facetRegistry;
+
+    /** @var QueryBuilderInterface */
+    private $searchProductsQueryBuilder;
+
+    /** @var DataHandlerInterface */
+    private $shopProductListDataHandler;
+
+    public function __construct(
+        string $namePropertyPrefix,
+        PaginatedFinderInterface $finder,
+        RegistryInterface $facetRegistry,
+        QueryBuilderInterface $searchProductsQueryBuilder,
+        DataHandlerInterface $shopProductListDataHandler
+    ) {
         $this->namePropertyPrefix = $namePropertyPrefix;
+        $this->finder = $finder;
+        $this->facetRegistry = $facetRegistry;
+        $this->searchProductsQueryBuilder = $searchProductsQueryBuilder;
+        $this->shopProductListDataHandler = $shopProductListDataHandler;
     }
 
     public function buildForm(FormBuilderInterface $builder, array $options): void
@@ -29,6 +61,57 @@ final class ShopProductsFilterType extends AbstractFilterType
             ->add('options', ProductOptionsFilterType::class, ['required' => false, 'label' => false])
             ->add('attributes', ProductAttributesFilterType::class, ['required' => false, 'label' => false])
             ->add('price', PriceFilterType::class, ['required' => false, 'label' => false])
-        ;
+            ->setMethod('GET');
+
+        $builder->addEventListener(FormEvents::PRE_SUBMIT, [$this, 'resolveFacets']);
+    }
+
+    public function configureOptions(OptionsResolver $resolver): void
+    {
+        $resolver->setDefaults([
+            'csrf_protection' => false,
+        ]);
+    }
+
+    public function resolveFacets(FormEvent $event): void
+    {
+        $query = $this->getQuery($event);
+
+        foreach ($this->facetRegistry->getFacets() as $facetId => $facet) {
+            $query->addAggregation($facet->getAggregation()->setName($facetId));
+        }
+
+        $query->setSize(0);
+
+        $results = $this->finder->findPaginated($query);
+
+        if ($results->getAdapter()) {
+            $this->modifyForm($event->getForm(), $results->getAdapter());
+        }
+    }
+
+    private function getQuery(FormEvent $event): Query
+    {
+        $eventData = $event->getData();
+        if (!isset($eventData[$this->namePropertyPrefix])) {
+            $eventData[$this->namePropertyPrefix] = '';
+        }
+
+        $data = $this->shopProductListDataHandler->retrieveData($eventData);
+
+        return new Query($this->searchProductsQueryBuilder->buildQuery($data));
+    }
+
+    private function modifyForm(FormInterface $form, AdapterInterface $adapter): void
+    {
+        if (!$adapter instanceof FantaPaginatorAdapter) {
+            return;
+        }
+
+        $form->add('facets', SearchFacetsType::class, [
+                'facets' => $adapter->getAggregations(),
+                'label' => false
+            ]
+        );
     }
 }

src/Resources/config/services/form.xml

@@ -29,6 +29,10 @@
 
         <service id="bitbag_sylius_elasticsearch_plugin.form.type.shop_products_filter" class="BitBag\SyliusElasticsearchPlugin\Form\Type\ShopProductsFilterType">
             <argument>%bitbag_es_shop_name_property_prefix%</argument>
+            <argument type="service" id="fos_elastica.finder.bitbag_shop_product" />
+            <argument type="service" id="bitbag_sylius_elasticsearch_plugin.facet.taxon_registry" />
+            <argument type="service" id="bitbag_sylius_elasticsearch_plugin.query_builder.shop_products" />
+            <argument type="service" id="bitbag_sylius_elasticsearch_plugin.controller.request_data_handler.shop_product_list" />
             <tag name="form.type" />
         </service>
 

src/Resources/views/Shop/Product/Index/_filterForm.html.twig

@@ -7,6 +7,9 @@
 <div class="item">
     {{ form_row(form.price) }}
 </div>
+<div class="item">
+    {{ form_row(form.facets) }}
+</div>
 <div class="item">
     <button type="submit" class="ui primary icon labeled button" style="width: 100%;"><i class="search icon"></i> {{ 'bitbag_sylius_elasticsearch_plugin.ui.filter'|trans }}</button>
 </div>