Added islandora_advanced_search module.

src/Controller/AjaxBlocksController.php

@@ -0,0 +1,165 @@
+<?php
+
+namespace Drupal\islandora_advanced_search\Controller;
+
+use Drupal\Core\Ajax\AjaxResponse;
+use Drupal\Core\Ajax\ReplaceCommand;
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\Path\CurrentPathStack;
+use Drupal\Core\PathProcessor\PathProcessorManager;
+use Drupal\Core\Render\RendererInterface;
+use Drupal\Core\Routing\CurrentRouteMatch;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\Routing\RouterInterface;
+
+/**
+ * Defines a controller to load a facet via AJAX.
+ */
+class AjaxBlocksController extends ControllerBase {
+
+  /**
+   * The entity storage for block.
+   *
+   * @var \Drupal\Core\Entity\EntityStorageInterface
+   */
+  protected $storage;
+
+  /**
+   * The renderer.
+   *
+   * @var \Drupal\Core\Render\RendererInterface
+   */
+  protected $renderer;
+
+  /**
+   * The current path.
+   *
+   * @var \Drupal\Core\Path\CurrentPathStack
+   */
+  protected $currentPath;
+
+  /**
+   * The dynamic router service.
+   *
+   * @var \Symfony\Component\Routing\Matcher\RequestMatcherInterface
+   */
+  protected $router;
+
+  /**
+   * The path processor service.
+   *
+   * @var \Drupal\Core\PathProcessor\InboundPathProcessorInterface
+   */
+  protected $pathProcessor;
+
+  /**
+   * The current route match service.
+   *
+   * @var \Drupal\Core\Routing\CurrentRouteMatch
+   */
+  protected $currentRouteMatch;
+
+  /**
+   * The service container this instance should use.
+   *
+   * @var \Symfony\Component\DependencyInjection\ContainerInterface
+   */
+  protected $container;
+
+  /**
+   * Constructs a FacetBlockAjaxController object.
+   *
+   * @param \Drupal\Core\Render\RendererInterface $renderer
+   *   The renderer service.
+   * @param \Drupal\Core\Path\CurrentPathStack $currentPath
+   *   The current path service.
+   * @param \Symfony\Component\Routing\RouterInterface $router
+   *   The router service.
+   * @param \Drupal\Core\PathProcessor\PathProcessorManager $pathProcessor
+   *   The path processor manager.
+   * @param \Drupal\Core\Routing\CurrentRouteMatch $currentRouteMatch
+   *   The current route match service.
+   * @param \Symfony\Component\DependencyInjection\ContainerInterface $container
+   *   The drupal container.
+   */
+  public function __construct(RendererInterface $renderer, CurrentPathStack $currentPath, RouterInterface $router, PathProcessorManager $pathProcessor, CurrentRouteMatch $currentRouteMatch, ContainerInterface $container) {
+    $this->storage = $this->entityTypeManager()->getStorage('block');
+    $this->renderer = $renderer;
+    $this->currentPath = $currentPath;
+    $this->router = $router;
+    $this->pathProcessor = $pathProcessor;
+    $this->currentRouteMatch = $currentRouteMatch;
+    $this->container = $container;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('renderer'),
+      $container->get('path.current'),
+      $container->get('router'),
+      $container->get('path_processor_manager'),
+      $container->get('current_route_match'),
+      $container
+    );
+  }
+
+  /**
+   * Loads and renders the facet blocks via AJAX.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The current request object.
+   *
+   * @return \Drupal\Core\Ajax\AjaxResponse
+   *   The ajax response.
+   *
+   * @throws \Symfony\Component\HttpKernel\Exception\NotFoundHttpException
+   *   Thrown when the view was not found.
+   */
+  public function respond(Request $request) {
+    $response = new AjaxResponse();
+
+    // Rebuild the request and the current path, needed for facets.
+    $path = $request->request->get('link');
+    $blocks = $request->request->get('blocks');
+
+    // Make sure we are not updating blocks multiple times.
+    $blocks = array_unique($blocks);
+
+    if (empty($path) || empty($blocks)) {
+      throw new NotFoundHttpException('No facet link or facet blocks found.');
+    }
+
+    $new_request = Request::create($path);
+    $request_stack = new RequestStack();
+    $processed = $this->pathProcessor->processInbound($new_request->getPathInfo(), $new_request);
+
+    $this->currentPath->setPath($processed);
+    $request->attributes->add($this->router->matchRequest($new_request));
+    $this->currentRouteMatch->resetRouteMatch();
+    $request_stack->push($new_request);
+    $this->container->set('request_stack', $request_stack);
+
+    // Build the facets blocks found for the current request and update.
+    foreach ($blocks as $block_id => $block_selector) {
+      $block_entity = $this->storage->load($block_id);
+
+      if ($block_entity) {
+        // Render a block, then add it to the response as a replace command.
+        $block_view = $this->entityTypeManager
+          ->getViewBuilder('block')
+          ->view($block_entity);
+
+        $block_view = (string) $this->renderer->renderPlain($block_view);
+        $response->addCommand(new ReplaceCommand($block_selector, $block_view));
+      }
+    }
+    return $response;
+  }
+
+}