VocabularyVid.php

<?php

namespace Drupal\taxonomy\Plugin\views\argument;

use Drupal\views\Plugin\views\argument\NumericArgument;
use Drupal\taxonomy\VocabularyStorageInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Argument handler to accept a vocabulary id.
 *
 * @ingroup views_argument_handlers
 *
 * @ViewsArgument("vocabulary_vid")
 */
class VocabularyVid extends NumericArgument {
    
    /**
     * The vocabulary storage.
     *
     * @var \Drupal\taxonomy\VocabularyStorageInterface
     */
    protected $vocabularyStorage;
    
    /**
     * Constructs the VocabularyVid 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\taxonomy\VocabularyStorageInterface $vocabulary_storage
     *   The vocabulary storage.
     */
    public function __construct(array $configuration, $plugin_id, $plugin_definition, VocabularyStorageInterface $vocabulary_storage) {
        parent::__construct($configuration, $plugin_id, $plugin_definition);
        $this->vocabularyStorage = $vocabulary_storage;
    }
    
    /**
     * {@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')
            ->getStorage('taxonomy_vocabulary'));
    }
    
    /**
     * Override the behavior of title(). Get the name of the vocabulary.
     */
    public function title() {
        $vocabulary = $this->vocabularyStorage
            ->load($this->argument);
        if ($vocabulary) {
            return $vocabulary->label();
        }
        return $this->t('No vocabulary');
    }

}