NodeType.php

<?php

namespace Drupal\node\Plugin\Condition;

use Drupal\Core\Condition\ConditionPluginBase;
use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides a 'Node Type' condition.
 *
 * @Condition(
 *   id = "node_type",
 *   label = @Translation("Node Bundle"),
 *   context_definitions = {
 *     "node" = @ContextDefinition("entity:node", label = @Translation("Node"))
 *   }
 * )
 */
class NodeType extends ConditionPluginBase implements ContainerFactoryPluginInterface {
    
    /**
     * The entity storage.
     *
     * @var \Drupal\Core\Entity\EntityStorageInterface
     */
    protected $entityStorage;
    
    /**
     * Creates a new NodeType instance.
     *
     * @param \Drupal\Core\Entity\EntityStorageInterface $entity_storage
     *   The entity storage.
     * @param array $configuration
     *   The plugin configuration, i.e. an array with configuration values keyed
     *   by configuration option name. The special key 'context' may be used to
     *   initialize the defined contexts by setting it to an array of context
     *   values keyed by context names.
     * @param string $plugin_id
     *   The plugin_id for the plugin instance.
     * @param mixed $plugin_definition
     *   The plugin implementation definition.
     */
    public function __construct(EntityStorageInterface $entity_storage, array $configuration, $plugin_id, $plugin_definition) {
        parent::__construct($configuration, $plugin_id, $plugin_definition);
        $this->entityStorage = $entity_storage;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
        return new static($container->get('entity_type.manager')
            ->getStorage('node_type'), $configuration, $plugin_id, $plugin_definition);
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
        $options = [];
        $node_types = $this->entityStorage
            ->loadMultiple();
        foreach ($node_types as $type) {
            $options[$type->id()] = $type->label();
        }
        $form['bundles'] = [
            '#title' => $this->t('Node types'),
            '#type' => 'checkboxes',
            '#options' => $options,
            '#default_value' => $this->configuration['bundles'],
        ];
        return parent::buildConfigurationForm($form, $form_state);
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
        $this->configuration['bundles'] = array_filter($form_state->getValue('bundles'));
        parent::submitConfigurationForm($form, $form_state);
    }
    
    /**
     * {@inheritdoc}
     */
    public function summary() {
        if (count($this->configuration['bundles']) > 1) {
            $bundles = $this->configuration['bundles'];
            $last = array_pop($bundles);
            $bundles = implode(', ', $bundles);
            return $this->t('The node bundle is @bundles or @last', [
                '@bundles' => $bundles,
                '@last' => $last,
            ]);
        }
        $bundle = reset($this->configuration['bundles']);
        return $this->t('The node bundle is @bundle', [
            '@bundle' => $bundle,
        ]);
    }
    
    /**
     * {@inheritdoc}
     */
    public function evaluate() {
        if (empty($this->configuration['bundles']) && !$this->isNegated()) {
            return TRUE;
        }
        $node = $this->getContextValue('node');
        return !empty($this->configuration['bundles'][$node->getType()]);
    }
    
    /**
     * {@inheritdoc}
     */
    public function defaultConfiguration() {
        return [
            'bundles' => [],
        ] + parent::defaultConfiguration();
    }

}