ModeratedNodeListBuilder.php

<?php

namespace Drupal\content_moderation;

use Drupal\Core\Datetime\DateFormatterInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Routing\RedirectDestinationInterface;
use Drupal\node\NodeListBuilder;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Defines a class to build a listing of moderated node entities.
 */
class ModeratedNodeListBuilder extends NodeListBuilder {
    
    /**
     * The entity storage class.
     *
     * @var \Drupal\Core\Entity\RevisionableStorageInterface
     */
    protected $storage;
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * Constructs a new ModeratedNodeListBuilder 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\Routing\RedirectDestinationInterface $redirect_destination
     *   The redirect destination service.
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     */
    public function __construct(EntityTypeInterface $entity_type, EntityStorageInterface $storage, DateFormatterInterface $date_formatter, RedirectDestinationInterface $redirect_destination, EntityTypeManagerInterface $entity_type_manager) {
        parent::__construct($entity_type, $storage, $date_formatter, $redirect_destination);
        $this->entityTypeManager = $entity_type_manager;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
        $entity_type_manager = $container->get('entity_type.manager');
        return new static($entity_type, $entity_type_manager->getStorage($entity_type->id()), $container->get('date.formatter'), $container->get('redirect.destination'), $entity_type_manager);
    }
    
    /**
     * {@inheritdoc}
     */
    public function load() {
        $revision_ids = $this->getEntityRevisionIds();
        return $this->storage
            ->loadMultipleRevisions($revision_ids);
    }
    
    /**
     * Loads entity revision IDs using a pager sorted by the entity revision ID.
     *
     * @return array
     *   An array of entity revision IDs.
     */
    protected function getEntityRevisionIds() {
        $query = $this->entityTypeManager
            ->getStorage('content_moderation_state')
            ->getAggregateQuery()
            ->aggregate('content_entity_id', 'MAX')
            ->groupBy('content_entity_revision_id')
            ->condition('content_entity_type_id', $this->entityTypeId)
            ->condition('moderation_state', 'published', '<>')
            ->sort('content_entity_revision_id', 'DESC');
        // Only add the pager if a limit is specified.
        if ($this->limit) {
            $query->pager($this->limit);
        }
        $result = $query->execute();
        return $result ? array_column($result, 'content_entity_revision_id') : [];
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildHeader() {
        $header = parent::buildHeader();
        $header['status'] = $this->t('Moderation state');
        return $header;
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildRow(EntityInterface $entity) {
        $row = parent::buildRow($entity);
        $row['status'] = $entity->moderation_state->value;
        return $row;
    }
    
    /**
     * {@inheritdoc}
     */
    public function render() {
        $build = parent::render();
        $build['table']['#empty'] = $this->t('There is no moderated @label yet. Only pending versions of @label, such as drafts, are listed here.', [
            '@label' => $this->entityType
                ->getLabel(),
        ]);
        return $build;
    }

}