class ContentModeration

class ContentModeration extends WorkflowTypeBase implements ContentModerationInterface, ContainerFactoryPluginInterface {
    use StringTranslationTrait;
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * The entity type bundle info service.
     *
     * @var \Drupal\Core\Entity\EntityTypeBundleInfoInterface
     */
    protected $entityTypeBundleInfo;
    
    /**
     * The moderation information service.
     *
     * @var \Drupal\content_moderation\ModerationInformationInterface
     */
    protected $moderationInfo;
    
    /**
     * Constructs a ContentModeration object.
     *
     * @param array $configuration
     *   A configuration array containing information about the plugin instance.
     * @param string $plugin_id
     *   The plugin_id for the plugin instance.
     * @param mixed $plugin_definition
     *   The plugin implementation definition.
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     * @param \Drupal\content_moderation\ModerationInformationInterface $moderation_info
     *   Moderation information service.
     */
    public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityTypeManagerInterface $entity_type_manager, EntityTypeBundleInfoInterface $entity_type_bundle_info, ModerationInformationInterface $moderation_info) {
        parent::__construct($configuration, $plugin_id, $plugin_definition);
        $this->entityTypeManager = $entity_type_manager;
        $this->entityTypeBundleInfo = $entity_type_bundle_info;
        $this->moderationInfo = $moderation_info;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
        return new static($configuration, $plugin_id, $plugin_definition, $container->get('entity_type.manager'), $container->get('entity_type.bundle.info'), $container->get('content_moderation.moderation_information'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getState($state_id) {
        $state = parent::getState($state_id);
        if (isset($this->configuration['states'][$state->id()]['published']) && isset($this->configuration['states'][$state->id()]['default_revision'])) {
            $state = new ContentModerationState($state, $this->configuration['states'][$state->id()]['published'], $this->configuration['states'][$state->id()]['default_revision']);
        }
        else {
            $state = new ContentModerationState($state);
        }
        return $state;
    }
    
    /**
     * {@inheritdoc}
     */
    public function workflowHasData(WorkflowInterface $workflow) {
        return (bool) $this->entityTypeManager
            ->getStorage('content_moderation_state')
            ->getQuery()
            ->condition('workflow', $workflow->id())
            ->count()
            ->accessCheck(FALSE)
            ->range(0, 1)
            ->execute();
    }
    
    /**
     * {@inheritdoc}
     */
    public function workflowStateHasData(WorkflowInterface $workflow, StateInterface $state) {
        return (bool) $this->entityTypeManager
            ->getStorage('content_moderation_state')
            ->getQuery()
            ->condition('workflow', $workflow->id())
            ->condition('moderation_state', $state->id())
            ->count()
            ->accessCheck(FALSE)
            ->range(0, 1)
            ->execute();
    }
    
    /**
     * {@inheritdoc}
     */
    public function getEntityTypes() {
        return array_keys($this->configuration['entity_types']);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getBundlesForEntityType($entity_type_id) {
        return isset($this->configuration['entity_types'][$entity_type_id]) ? $this->configuration['entity_types'][$entity_type_id] : [];
    }
    
    /**
     * {@inheritdoc}
     */
    public function appliesToEntityTypeAndBundle($entity_type_id, $bundle_id) {
        return in_array($bundle_id, $this->getBundlesForEntityType($entity_type_id), TRUE);
    }
    
    /**
     * {@inheritdoc}
     */
    public function removeEntityTypeAndBundle($entity_type_id, $bundle_id) {
        if (!isset($this->configuration['entity_types'][$entity_type_id])) {
            return;
        }
        $key = array_search($bundle_id, $this->configuration['entity_types'][$entity_type_id], TRUE);
        if ($key !== FALSE) {
            unset($this->configuration['entity_types'][$entity_type_id][$key]);
            if (empty($this->configuration['entity_types'][$entity_type_id])) {
                unset($this->configuration['entity_types'][$entity_type_id]);
            }
            else {
                $this->configuration['entity_types'][$entity_type_id] = array_values($this->configuration['entity_types'][$entity_type_id]);
            }
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function addEntityTypeAndBundle($entity_type_id, $bundle_id) {
        if (!$this->appliesToEntityTypeAndBundle($entity_type_id, $bundle_id)) {
            $this->configuration['entity_types'][$entity_type_id][] = $bundle_id;
            sort($this->configuration['entity_types'][$entity_type_id]);
            ksort($this->configuration['entity_types']);
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function defaultConfiguration() {
        return [
            'states' => [
                'draft' => [
                    'label' => 'Draft',
                    'published' => FALSE,
                    'default_revision' => FALSE,
                    'weight' => 0,
                ],
                'published' => [
                    'label' => 'Published',
                    'published' => TRUE,
                    'default_revision' => TRUE,
                    'weight' => 1,
                ],
            ],
            'transitions' => [
                'create_new_draft' => [
                    'label' => 'Create New Draft',
                    'to' => 'draft',
                    'weight' => 0,
                    'from' => [
                        'draft',
                        'published',
                    ],
                ],
                'publish' => [
                    'label' => 'Publish',
                    'to' => 'published',
                    'weight' => 1,
                    'from' => [
                        'draft',
                        'published',
                    ],
                ],
            ],
            'entity_types' => [],
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function calculateDependencies() {
        $dependencies = parent::calculateDependencies();
        foreach ($this->getEntityTypes() as $entity_type_id) {
            $entity_definition = $this->entityTypeManager
                ->getDefinition($entity_type_id);
            foreach ($this->getBundlesForEntityType($entity_type_id) as $bundle) {
                $dependency = $entity_definition->getBundleConfigDependency($bundle);
                $dependencies[$dependency['type']][] = $dependency['name'];
            }
        }
        return $dependencies;
    }
    
    /**
     * {@inheritdoc}
     */
    public function onDependencyRemoval(array $dependencies) {
        $changed = parent::onDependencyRemoval($dependencies);
        // When bundle config entities are removed, ensure they are cleaned up from
        // the workflow.
        foreach ($dependencies['config'] as $removed_config) {
            if ($entity_type_id = $removed_config->getEntityType()
                ->getBundleOf()) {
                $bundle_id = $removed_config->id();
                $this->removeEntityTypeAndBundle($entity_type_id, $bundle_id);
                $changed = TRUE;
            }
        }
        // When modules that provide entity types are removed, ensure they are also
        // removed from the workflow.
        if (!empty($dependencies['module'])) {
            // Gather all entity definitions provided by the dependent modules which
            // are being removed.
            $module_entity_definitions = [];
            foreach ($this->entityTypeManager
                ->getDefinitions() as $entity_definition) {
                if (in_array($entity_definition->getProvider(), $dependencies['module'])) {
                    $module_entity_definitions[] = $entity_definition;
                }
            }
            // For all entity types provided by the uninstalled modules, remove any
            // configuration for those types.
            foreach ($module_entity_definitions as $module_entity_definition) {
                foreach ($this->getBundlesForEntityType($module_entity_definition->id()) as $bundle) {
                    $this->removeEntityTypeAndBundle($module_entity_definition->id(), $bundle);
                    $changed = TRUE;
                }
            }
        }
        return $changed;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getConfiguration() {
        $configuration = parent::getConfiguration();
        // Ensure that states and entity types are ordered consistently.
        ksort($configuration['states']);
        ksort($configuration['entity_types']);
        return $configuration;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getInitialState($entity = NULL) {
        // Workflows are not tied to entities, but Content Moderation adds the
        // relationship between Workflows and entities. Content Moderation needs the
        // entity object to be able to determine the initial state based on
        // publishing status.
        if (!$entity instanceof ContentEntityInterface) {
            throw new \InvalidArgumentException('A content entity object must be supplied.');
        }
        if ($entity instanceof EntityPublishedInterface && !$entity->isNew()) {
            return $this->getState($entity->isPublished() ? 'published' : 'draft');
        }
        return $this->getState(!empty($this->configuration['default_moderation_state']) ? $this->configuration['default_moderation_state'] : 'draft');
    }

}