ezoller
4 years ago
4 changed files with 177 additions and 16 deletions
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<?php |
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namespace Drupal\islandora\Plugin\Condition; |
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use Drupal\Core\Condition\ConditionPluginBase; |
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use Drupal\Core\Entity\EntityInterface; |
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use Drupal\Core\Entity\EntityTypeManagerInterface; |
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use Drupal\Core\Form\FormStateInterface; |
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use Drupal\Core\Plugin\ContainerFactoryPluginInterface; |
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use Drupal\field\Entity\FieldStorageConfig; |
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use Symfony\Component\DependencyInjection\ContainerInterface; |
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/** |
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* Condition for a node referenced by another node using the configured field. |
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* |
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* @Condition( |
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* id = "node_referenced_by_node", |
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* label = @Translation("Node is referenced by other nodes"), |
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* context = { |
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* "node" = @ContextDefinition("entity:node", required = TRUE , label = @Translation("node")) |
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* } |
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* ) |
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*/ |
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class NodeReferencedByNode extends ConditionPluginBase implements ContainerFactoryPluginInterface { |
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/** |
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* Node storage. |
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* |
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* @var \Drupal\Core\Entity\EntityTypeManagerInterface |
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*/ |
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protected $entityTypeManager; |
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/** |
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* Constructor. |
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* |
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* @param array $configuration |
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* The plugin configuration, i.e. an array with configuration values keyed |
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* by configuration option name. The special key 'context' may be used to |
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* initialize the defined contexts by setting it to an array of context |
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* values keyed by context names. |
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* @param string $plugin_id |
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* The plugin_id for the plugin instance. |
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* @param mixed $plugin_definition |
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* The plugin implementation definition. |
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* @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager |
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* Entity type manager. |
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*/ |
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public function __construct( |
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array $configuration, |
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$plugin_id, |
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$plugin_definition, |
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EntityTypeManagerInterface $entity_type_manager |
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) { |
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parent::__construct($configuration, $plugin_id, $plugin_definition); |
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$this->entityTypeManager = $entity_type_manager; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function defaultConfiguration() { |
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return parent::defaultConfiguration() + [ |
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'reference_field' => 'field_member_of', |
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]; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) { |
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return new static( |
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$configuration, |
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$plugin_id, |
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$plugin_definition, |
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$container->get('entity_type.manager') |
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); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function buildConfigurationForm(array $form, FormStateInterface $form_state) { |
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$field_map = \Drupal::service('entity_field.manager')->getFieldMapByFieldType('entity_reference'); |
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$node_fields = array_keys($field_map['node']); |
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$options = array_combine($node_fields, $node_fields); |
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$form['reference_field'] = [ |
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'#type' => 'select', |
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'#title' => t('Field to check for reference to this node'), |
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'#options' => $options, |
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'#default_value' => $this->configuration['reference_field'], |
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'#required' => TRUE, |
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'#description' => t("Machine name of field that should be checked for references to this node."), |
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]; |
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return parent::buildConfigurationForm($form, $form_state); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function submitConfigurationForm(array &$form, FormStateInterface $form_state) { |
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$this->configuration['reference_field'] = $form_state->getValue('reference_field'); |
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parent::submitConfigurationForm($form, $form_state); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function evaluate() { |
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$node = $this->getContextValue('node'); |
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if (!$node) { |
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return FALSE; |
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} |
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return $this->evaluateEntity($node); |
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} |
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/** |
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* Evaluates if an entity is referenced in the configured node field. |
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* |
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* @param \Drupal\Core\Entity\EntityInterface $entity |
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* The entity to evaluate. |
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* |
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* @return bool |
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* TRUE if entity is referenced.. |
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*/ |
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protected function evaluateEntity(EntityInterface $entity) { |
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$reference_field = $this->configuration['reference_field']; |
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$config = FieldStorageConfig::loadByName('node', $reference_field); |
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if ($config) { |
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$id_count = \Drupal::entityQuery('node') |
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->condition($reference_field, $entity->id()) |
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->count() |
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->execute(); |
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return ($id_count > 0); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function summary() { |
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if (!empty($this->configuration['negate'])) { |
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return $this->t("The node is not referenced in another node's field `@field`.", ['@field' => $this->configuration['reference_field']]); |
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} |
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else { |
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return $this->t("The node is referenced in another node's field `@field`.", ['@field' => $this->configuration['reference_field']]); |
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} |
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} |
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} |
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