NodeCounter.php

<?php

namespace Drupal\statistics\Plugin\migrate\source;

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

/**
 * Drupal 6/7 node counter 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 = "node_counter",
 *   source_module = "statistics"
 * )
 */
class NodeCounter extends DrupalSqlBase {
    
    /**
     * {@inheritdoc}
     */
    public function query() {
        return $this->select('node_counter', 'nc')
            ->fields('nc');
    }
    
    /**
     * {@inheritdoc}
     */
    public function fields() {
        return [
            'nid' => $this->t('The node ID.'),
            'totalcount' => $this->t('The total number of times the node has been viewed.'),
            'daycount' => $this->t('The total number of times the node has been viewed today.'),
            'timestamp' => $this->t('The most recent time the node has been viewed.'),
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function getIds() {
        $ids['nid']['type'] = 'integer';
        return $ids;
    }

}