EntityFieldStorageConfig.php

<?php

namespace Drupal\migrate\Plugin\migrate\destination;

use Drupal\migrate\Attribute\MigrateDestination;

/**
 * Provides destination plugin for field_storage_config configuration entities.
 *
 * The Field API defines two primary data structures, FieldStorage and Field.
 * A FieldStorage defines a particular type of data that can be attached to
 * entities as a Field instance.
 *
 * The example below creates a storage for a simple text field. The example uses
 * the EmptySource source plugin and constant source values for the sake of
 * simplicity.
 * @code
 * id: field_storage_example
 * label: Field storage example
 * source:
 * plugin: empty
 * constants:
 *   entity_type: node
 *   id: node.field_text_example
 *   field_name: field_text_example
 *   type: string
 *   cardinality: 1
 *   settings:
 *     max_length: 10
 *   langcode: en
 *   translatable: true
 * process:
 *   entity_type: constants/entity_type
 *   id: constants/id
 *   field_name: constants/field_name
 *   type: constants/type
 *   cardinality: constants/cardinality
 *   settings: constants/settings
 *   langcode: constants/langcode
 *   translatable: constants/translatable
 * destination:
 *   plugin: entity:field_storage_config
 * @endcode
 *
 * For a full list of the properties of a FieldStorage configuration entity,
 * refer to \Drupal\field\Entity\FieldStorageConfig.
 *
 * For an example on how to migrate a Field instance of this FieldStorage,
 * refer to \Drupal\migrate\Plugin\migrate\destination\EntityFieldInstance.
 */
class EntityFieldStorageConfig extends EntityConfigBase {
    
    /**
     * {@inheritdoc}
     */
    public function getIds() {
        $ids['entity_type']['type'] = 'string';
        $ids['field_name']['type'] = 'string';
        // @todo Remove conditional. https://www.drupal.org/node/3004574
        if ($this->isTranslationDestination()) {
            $ids['langcode']['type'] = 'string';
        }
        return $ids;
    }
    
    /**
     * {@inheritdoc}
     */
    public function rollback(array $destination_identifier) {
        if ($this->isTranslationDestination()) {
            $language = $destination_identifier['langcode'];
            unset($destination_identifier['langcode']);
            $destination_identifier = [
                implode('.', $destination_identifier),
                'langcode' => $language,
            ];
        }
        else {
            $destination_identifier = [
                implode('.', $destination_identifier),
            ];
        }
        parent::rollback($destination_identifier);
    }

}