drupal_module__reinstall/src/Plugin/migrate/source/ReinstallFileSource.php

<?php

namespace Drupal\reinstall\Plugin\migrate\source;

use Drupal\migrate\Plugin\MigrationInterface;
use Drupal\migrate\Row;

/**
 * Source plugin for terms from a YAML file.
 *
 * @MigrateSource(
 *   id = "reinstall_files"
 * )
 */
class ReinstallFileSource extends SimpleSource {

  /**
   * Constructor.
   */
  public function __construct(
    array $configuration,
    string $pluginId,
    array $pluginDefinition,
    MigrationInterface $migration = NULL
  ) {
    parent::__construct($configuration, $pluginId, $pluginDefinition, $migration);
    $this->records = array_map([$this, 'flattenRecord'], $this->initialParse($configuration));
  }

  protected function flattenRecord($record) {
    $row = new Row($record);
    $this->flattenRow($row);
    return $row->getSource();
  }

  /**
   * {@inheritdoc}
   */
  public function fields() {
    $ret = [
      'fid'               => 'File ID',
      'uid'               => 'User ID',
      'uuid'              => 'UUID',
      'langcode'          => 'ISO 639 language code',
      'filename'          => 'File name without directory',
      'uri'               => 'File URI, like public://foo.png',
      'filemime'          => 'Mime type per https://www.iana.org/assignments/media-types/media-types.xhtml',
      'filesize'          => 'File size, in bytes',
      'status'            => 'File status (temporary or permanent)',
      'created'           => 'Creation timestamp',
      'changed'           => 'Modification timestamp',
    ];

    return $ret;
  }

  /**
   * {@inheritdoc}
   */
  public function getIds() {
    $ids = [
      'fid' => [
        'type' => 'integer',
      ],
    ];
    return $ids;
  }

}