class D7FieldCollectionItemDeriver

d7_field_collection.yml in paragraphs/migrations/d7_field_collection.yml

paragraphs/migrations/d7_field_collection.yml

d7_field_collection_revisions.yml in paragraphs/migrations/d7_field_collection_revisions.yml

paragraphs/migrations/d7_field_collection_revisions.yml

class D7FieldCollectionItemDeriver extends DeriverBase implements ContainerDeriverInterface {
  use MigrationDeriverTrait;
  use StringTranslationTrait;

  /**
   * The base plugin ID this derivative is for.
   *
   * @var string
   */
  protected $basePluginId;

  /**
   * The migration field discovery service.
   *
   * @var \Drupal\migrate_drupal\FieldDiscoveryInterface
   */
  protected $fieldDiscovery;

  /**
   * D7FieldCollectionItemDeriver constructor.
   *
   * @param string $base_plugin_id
   *   The base plugin ID for the plugin ID.
   * @param \Drupal\migrate_drupal\FieldDiscoveryInterface $field_discovery
   *   The migration field discovery service.
   */
  public function __construct($base_plugin_id, FieldDiscoveryInterface $field_discovery) {
    $this->basePluginId = $base_plugin_id;
    $this->fieldDiscovery = $field_discovery;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, $base_plugin_id) {
    return new static($base_plugin_id, $container
      ->get('migrate_drupal.field_discovery'));
  }

  /**
   * {@inheritdoc}
   */
  public function getDerivativeDefinitions($base_plugin_definition) {
    $types = static::getSourcePlugin('d7_field_collection_type');
    try {
      $types
        ->checkRequirements();
    } catch (RequirementsException $e) {
      return $this->derivatives;
    }
    try {
      foreach ($types as $row) {

        /** @var \Drupal\migrate\Row $row */
        $values = $base_plugin_definition;
        $fc_bundle = $row
          ->getSourceProperty('field_name');
        $p_bundle = $row
          ->getSourceProperty('bundle');
        $values['label'] = $this
          ->t('@label (@type)', [
          '@label' => $values['label'],
          '@type' => $row
            ->getSourceProperty('name'),
        ]);
        $values['source']['field_name'] = $fc_bundle;
        $values['destination']['default_bundle'] = $p_bundle;

        /** @var \Drupal\migrate\Plugin\Migration $migration */
        $migration = \Drupal::service('plugin.manager.migration')
          ->createStubMigration($values);
        $migration
          ->setProcessOfProperty('parent_id', 'parent_id');
        $migration
          ->setProcessOfProperty('parent_type', 'parent_type');
        $migration
          ->setProcessOfProperty('parent_field_name', 'field_name');
        $this->fieldDiscovery
          ->addBundleFieldProcesses($migration, 'field_collection_item', $fc_bundle);
        $this->derivatives[$p_bundle] = $migration
          ->getPluginDefinition();
      }
    } catch (DatabaseExceptionWrapper $e) {

      // Once we begin iterating the source plugin it is possible that the
      // source tables will not exist. This can happen when the
      // MigrationPluginManager gathers up the migration definitions but we do
      // not actually have a Drupal 7 source database.
    }
    return $this->derivatives;
  }

}