UserUpdate7002.php

<?php

namespace Drupal\user\Plugin\migrate\process\d6;

use Drupal\migrate\MigrateExecutableInterface;
use Drupal\migrate\ProcessPluginBase;
use Drupal\migrate\Row;
use Drupal\Core\Config\Config;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Converts user time zones from time zone offsets to time zone names.
 *
 * @MigrateProcessPlugin(
 *   id = "user_update_7002"
 * )
 */
class UserUpdate7002 extends ProcessPluginBase implements ContainerFactoryPluginInterface {
    
    /**
     * System timezones.
     *
     * @var array
     */
    protected static $timezones;
    
    /**
     * Contains the system.theme configuration object.
     *
     * @var \Drupal\Core\Config\Config
     */
    protected $dateConfig;
    
    /**
     * {@inheritdoc}
     */
    public function __construct(array $configuration, $plugin_id, array $plugin_definition, Config $date_config) {
        parent::__construct($configuration, $plugin_id, $plugin_definition);
        $this->dateConfig = $date_config;
        if (!isset(static::$timezones)) {
            static::$timezones = system_time_zones();
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
        return new static($configuration, $plugin_id, $plugin_definition, $container->get('config.factory')
            ->get('system.date'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
        $timezone = NULL;
        if ($row->hasSourceProperty('timezone_name')) {
            if (isset(static::$timezones[$row->getSourceProperty('timezone_name')])) {
                $timezone = $row->getSourceProperty('timezone_name');
            }
        }
        if (!$timezone && $row->hasSourceProperty('event_timezone')) {
            if (isset(static::$timezones[$row->getSourceProperty('event_timezone')])) {
                $timezone = $row->getSourceProperty('event_timezone');
            }
        }
        if ($timezone === NULL) {
            $timezone = $this->dateConfig
                ->get('timezone.default');
        }
        return $timezone;
    }

}