--- /dev/null
+<?php
+
+namespace Drupal\media;
+
+use Drupal\Core\Datetime\DateFormatterInterface;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Entity\EntityListBuilder;
+use Drupal\Core\Entity\EntityStorageInterface;
+use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\Core\Language\LanguageManagerInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Provides a listing of media items.
+ */
+class MediaListBuilder extends EntityListBuilder {
+
+ /**
+ * The date formatter service.
+ *
+ * @var \Drupal\Core\Datetime\DateFormatterInterface
+ */
+ protected $dateFormatter;
+
+ /**
+ * The language manager service.
+ *
+ * @var \Drupal\Core\Language\LanguageManagerInterface
+ */
+ protected $languageManager;
+
+ /**
+ * Indicates whether the 'thumbnail' image style exists.
+ *
+ * @var bool
+ */
+ protected $thumbnailStyleExists = FALSE;
+
+ /**
+ * Constructs a new MediaListBuilder object.
+ *
+ * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
+ * The entity type definition.
+ * @param \Drupal\Core\Entity\EntityStorageInterface $storage
+ * The entity storage class.
+ * @param \Drupal\Core\Datetime\DateFormatterInterface $date_formatter
+ * The date formatter service.
+ * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
+ * The language manager service.
+ * @param \Drupal\Core\Entity\EntityStorageInterface $image_style_storage
+ * The entity storage class for image styles.
+ */
+ public function __construct(EntityTypeInterface $entity_type, EntityStorageInterface $storage, DateFormatterInterface $date_formatter, LanguageManagerInterface $language_manager, EntityStorageInterface $image_style_storage) {
+ parent::__construct($entity_type, $storage);
+
+ $this->dateFormatter = $date_formatter;
+ $this->languageManager = $language_manager;
+ $this->thumbnailStyleExists = !empty($image_style_storage->load('thumbnail'));
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
+ return new static(
+ $entity_type,
+ $container->get('entity.manager')->getStorage($entity_type->id()),
+ $container->get('date.formatter'),
+ $container->get('language_manager'),
+ $container->get('entity_type.manager')->getStorage('image_style')
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildHeader() {
+ $header = [];
+ if ($this->thumbnailStyleExists) {
+ $header['thumbnail'] = [
+ 'data' => $this->t('Thumbnail'),
+ 'class' => [RESPONSIVE_PRIORITY_LOW],
+ ];
+ }
+ $header += [
+ 'name' => $this->t('Media Name'),
+ 'type' => [
+ 'data' => $this->t('Type'),
+ 'class' => [RESPONSIVE_PRIORITY_MEDIUM],
+ ],
+ 'author' => [
+ 'data' => $this->t('Author'),
+ 'class' => [RESPONSIVE_PRIORITY_LOW],
+ ],
+ 'status' => $this->t('Status'),
+ 'changed' => [
+ 'data' => $this->t('Updated'),
+ 'class' => [RESPONSIVE_PRIORITY_LOW],
+ ],
+ ];
+ // Enable language column if multiple languages are added.
+ if ($this->languageManager->isMultilingual()) {
+ $header['language'] = [
+ 'data' => $this->t('Language'),
+ 'class' => [RESPONSIVE_PRIORITY_LOW],
+ ];
+ }
+ return $header + parent::buildHeader();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildRow(EntityInterface $entity) {
+ /** @var \Drupal\media\MediaInterface $entity */
+ if ($this->thumbnailStyleExists) {
+ $row['thumbnail'] = [];
+ if ($thumbnail_url = $entity->getSource()->getMetadata($entity, 'thumbnail_uri')) {
+ $row['thumbnail']['data'] = [
+ '#theme' => 'image_style',
+ '#style_name' => 'thumbnail',
+ '#uri' => $thumbnail_url,
+ '#height' => 50,
+ ];
+ }
+ }
+ $row['name']['data'] = [
+ '#type' => 'link',
+ '#title' => $entity->label(),
+ '#url' => $entity->toUrl(),
+ ];
+ $row['type'] = $entity->bundle->entity->label();
+ $row['author']['data'] = [
+ '#theme' => 'username',
+ '#account' => $entity->getOwner(),
+ ];
+ $row['status'] = $entity->isPublished() ? $this->t('Published') : $this->t('Unpublished');
+ $row['changed'] = $this->dateFormatter->format($entity->getChangedTime(), 'short');
+
+ if ($this->languageManager->isMultilingual()) {
+ $row['language'] = $this->languageManager->getLanguageName($entity->language()->getId());
+ }
+ return $row + parent::buildRow($entity);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function getEntityIds() {
+ $query = $this->getStorage()->getQuery()
+ ->sort('changed', 'DESC');
+
+ // Only add the pager if a limit is specified.
+ if ($this->limit) {
+ $query->pager($this->limit);
+ }
+ return $query->execute();
+ }
+
+}