AbstractDataNodeLifeCycle.php

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<?php
 
namespace Drupal\dkan_common;
 
use Drupal\Core\Entity\EntityInterface;
use Drupal\dkan_common\Exception\DataNodeLifeCycleEntityValidationException;
use Drupal\node\Entity\Node;
 
class AbstractDataNodeLifeCycle {
  protected $node;
 
  public function __construct(EntityInterface $entity) {
    $this->validate($entity);
    $this->node = $entity;
  }
 
  protected function getDataType() {
    return $this->node->get('field_data_type')->value;
  }
 
  protected function setDataType($type) {
    $this->node->set('field_data_type', $type);
  }
 
  protected function getMetaData() {
    /* @var $entity \Drupal\node\Entity\Node */
    $entity = $this->node;
    return json_decode($entity->get('field_json_metadata')->value);
  }
 
  protected function setMetadata($metadata) {
    /* @var $entity \Drupal\node\Entity\Node */
    $entity = $this->node;
    $entity->set('field_json_metadata', json_encode($metadata));
  }
 
  private function validate(EntityInterface $entity) {
    if (!($entity instanceof Node)) {
      throw new DataNodeLifeCycleEntityValidationException("We only work with nodes.");
    }
 
    if ($entity->bundle() != "data") {
      throw new DataNodeLifeCycleEntityValidationException("We only work with data nodes.");
    }
  }
 
}