--- /dev/null
+<?php
+
+namespace Drupal\aggregator;
+
+use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\Core\Entity\EntityViewBuilder;
+use Drupal\Core\Config\Config;
+use Drupal\Core\Language\LanguageManagerInterface;
+use Drupal\Core\Url;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * View builder handler for aggregator feeds.
+ */
+class FeedViewBuilder extends EntityViewBuilder {
+
+ /**
+ * Constructs a new FeedViewBuilder.
+ *
+ * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
+ * The entity type definition.
+ * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
+ * The entity manager service.
+ * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
+ * The language manager.
+ * @param \Drupal\Core\Config\Config $config
+ * The 'aggregator.settings' config.
+ */
+ public function __construct(EntityTypeInterface $entity_type, EntityManagerInterface $entity_manager, LanguageManagerInterface $language_manager, Config $config) {
+ parent::__construct($entity_type, $entity_manager, $language_manager);
+ $this->config = $config;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
+ return new static(
+ $entity_type,
+ $container->get('entity.manager'),
+ $container->get('language_manager'),
+ $container->get('config.factory')->get('aggregator.settings')
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildComponents(array &$build, array $entities, array $displays, $view_mode) {
+ parent::buildComponents($build, $entities, $displays, $view_mode);
+
+ foreach ($entities as $id => $entity) {
+ $bundle = $entity->bundle();
+ $display = $displays[$bundle];
+
+ if ($display->getComponent('items')) {
+ // When in summary view mode, respect the list_max setting.
+ $limit = $view_mode == 'summary' ? $this->config->get('source.list_max') : 20;
+ // Retrieve the items attached to this feed.
+ $items = $this->entityManager
+ ->getStorage('aggregator_item')
+ ->loadByFeed($entity->id(), $limit);
+
+ $build[$id]['items'] = $this->entityManager
+ ->getViewBuilder('aggregator_item')
+ ->viewMultiple($items, $view_mode, $entity->language()->getId());
+
+ if ($view_mode == 'full') {
+ // Also add the pager.
+ $build[$id]['pager'] = ['#type' => 'pager'];
+ }
+ }
+
+ if ($display->getComponent('description')) {
+ $build[$id]['description'] = [
+ '#markup' => $entity->getDescription(),
+ '#allowed_tags' => _aggregator_allowed_tags(),
+ '#prefix' => '<div class="feed-description">',
+ '#suffix' => '</div>',
+ ];
+ }
+
+ if ($display->getComponent('image')) {
+ $image_link = [];
+ // Render the image as link if it is available.
+ $image = $entity->getImage();
+ $label = $entity->label();
+ $link_href = $entity->getWebsiteUrl();
+ if ($image && $label && $link_href) {
+ $link_title = [
+ '#theme' => 'image',
+ '#uri' => $image,
+ '#alt' => $label,
+ ];
+ $image_link = [
+ '#type' => 'link',
+ '#title' => $link_title,
+ '#url' => Url::fromUri($link_href),
+ '#options' => [
+ 'attributes' => ['class' => ['feed-image']],
+ ],
+ ];
+ }
+ $build[$id]['image'] = $image_link;
+ }
+
+ if ($display->getComponent('feed_icon')) {
+ $build[$id]['feed_icon'] = [
+ '#theme' => 'feed_icon',
+ '#url' => $entity->getUrl(),
+ '#title' => t('@title feed', ['@title' => $entity->label()]),
+ ];
+ }
+
+ if ($display->getComponent('more_link')) {
+ $title_stripped = strip_tags($entity->label());
+ $build[$id]['more_link'] = [
+ '#type' => 'link',
+ '#title' => t('More<span class="visually-hidden"> posts about @title</span>', [
+ '@title' => $title_stripped,
+ ]),
+ '#url' => Url::fromRoute('entity.aggregator_feed.canonical', ['aggregator_feed' => $entity->id()]),
+ '#options' => [
+ 'attributes' => [
+ 'title' => $title_stripped,
+ ],
+ ],
+ ];
+ }
+
+ }
+ }
+
+}