Type.php

<?php

namespace Drupal\node\Plugin\views\argument;

use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\views\Plugin\views\argument\StringArgument;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Argument handler to accept a node type.
 *
 * @ViewsArgument("node_type")
 */
class Type extends StringArgument {
    
    /**
     * NodeType storage handler.
     *
     * @var \Drupal\Core\Entity\EntityStorageInterface
     */
    protected $nodeTypeStorage;
    
    /**
     * Constructs a new Node Type 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\EntityStorageInterface $node_type_storage
     *   The entity storage class.
     */
    public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityStorageInterface $node_type_storage) {
        parent::__construct($configuration, $plugin_id, $plugin_definition);
        $this->nodeTypeStorage = $node_type_storage;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
        $entity_type_manager = $container->get('entity_type.manager');
        return new static($configuration, $plugin_id, $plugin_definition, $entity_type_manager->getStorage('node_type'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function summaryName($data) {
        return $this->node_type($data->{$this->name_alias});
    }
    
    /**
     * {@inheritdoc}
     */
    public function title() {
        return $this->node_type($this->argument);
    }
    public function node_type($type_name) {
        $type = $this->nodeTypeStorage
            ->load($type_name);
        $output = $type ? $type->label() : $this->t('Unknown content type');
        return $output;
    }

}