class NodeType

class NodeType extends ConfigEntityBundleBase implements NodeTypeInterface {
    
    /**
     * The machine name of this node type.
     *
     * @var string
     *
     * @todo Rename to $id.
     */
    protected $type;
    
    /**
     * The human-readable name of the node type.
     *
     * @var string
     *
     * @todo Rename to $label.
     */
    protected $name;
    
    /**
     * A brief description of this node type.
     *
     * @var string|null
     */
    protected $description = NULL;
    
    /**
     * Help information shown to the user when creating a Node of this type.
     *
     * @var string|null
     */
    protected $help = NULL;
    
    /**
     * Default value of the 'Create new revision' checkbox of this node type.
     *
     * @var bool
     */
    protected $new_revision = TRUE;
    
    /**
     * The preview mode.
     *
     * @var int
     */
    protected $preview_mode = DRUPAL_OPTIONAL;
    
    /**
     * Display setting for author and date Submitted by post information.
     *
     * @var bool
     */
    protected $display_submitted = TRUE;
    
    /**
     * {@inheritdoc}
     */
    public function id() {
        return $this->type;
    }
    
    /**
     * {@inheritdoc}
     */
    public function isLocked() {
        $locked = \Drupal::state()->get('node.type.locked');
        return $locked[$this->id()] ?? FALSE;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setNewRevision($new_revision) {
        $this->new_revision = $new_revision;
    }
    
    /**
     * {@inheritdoc}
     */
    public function displaySubmitted() {
        return $this->display_submitted;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setDisplaySubmitted($display_submitted) {
        $this->display_submitted = $display_submitted;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getPreviewMode() {
        return $this->preview_mode;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setPreviewMode($preview_mode) {
        $this->preview_mode = $preview_mode;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getHelp() {
        return $this->help ?? '';
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDescription() {
        return $this->description ?? '';
    }
    
    /**
     * {@inheritdoc}
     */
    public function postSave(EntityStorageInterface $storage, $update = TRUE) {
        parent::postSave($storage, $update);
        if ($update && $this->getOriginalId() != $this->id()) {
            $update_count = $storage->updateType($this->getOriginalId(), $this->id());
            if ($update_count) {
                \Drupal::messenger()->addStatus(\Drupal::translation()->formatPlural($update_count, 'Changed the content type of 1 post from %old-type to %type.', 'Changed the content type of @count posts from %old-type to %type.', [
                    '%old-type' => $this->getOriginalId(),
                    '%type' => $this->id(),
                ]));
            }
        }
        if ($update) {
            // Clear the cached field definitions as some settings affect the field
            // definitions.
            \Drupal::service('entity_field.manager')->clearCachedFieldDefinitions();
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public static function postDelete(EntityStorageInterface $storage, array $entities) {
        parent::postDelete($storage, $entities);
        // Clear the node type cache to reflect the removal.
        $storage->resetCache(array_keys($entities));
    }
    
    /**
     * {@inheritdoc}
     */
    public function shouldCreateNewRevision() {
        return $this->new_revision;
    }

}