TrackerNode.php

<?php

namespace Drupal\tracker\Plugin\migrate\source\d7;

use Drupal\migrate_drupal\Plugin\migrate\source\DrupalSqlBase;

/**
 * Drupal 7 tracker node source from database.
 *
 * For available configuration keys, refer to the parent classes.
 *
 * @see \Drupal\migrate\Plugin\migrate\source\SqlBase
 * @see \Drupal\migrate\Plugin\migrate\source\SourcePluginBase
 *
 * @MigrateSource(
 *   id = "d7_tracker_node",
 *   source_module = "tracker"
 * )
 */
class TrackerNode extends DrupalSqlBase {
    
    /**
     * {@inheritdoc}
     */
    public function query() {
        return $this->select('tracker_node', 'tn')
            ->fields('tn');
    }
    
    /**
     * {@inheritdoc}
     */
    public function fields() {
        return [
            'nid' => $this->t('The {node}.nid this record tracks.'),
            'published' => $this->t('Boolean indicating whether the node is published.'),
            'changed' => $this->t('The Unix timestamp when the node was most recently saved or commented on.'),
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function getIds() {
        $ids['nid']['type'] = 'integer';
        return $ids;
    }

}