<?php
use Drupal\Core\Database\Database;
/**
 * Transfer logouts time settings from configs to states.
 */
function autologout_update_8001(&$sandbox) {
  $result = Database::getConnection()
    ->select('config', 'c')
    ->fields('c', ['name', 'data'])
    ->condition('name', 'autologout.user.%', 'LIKE')
    ->execute()->fetchAll();
  if (!isset($sandbox['current'])) {
    $sandbox['current'] = 0;
    $sandbox['max'] = count($result);
  }
  $limit = 5;
  $result = array_slice($result, $sandbox['current'], $limit);
  foreach ($result as $row) {
    $key = $row->name;
    // User uid is a part of the key after. E.g. autologout.user.1 for user 1.
    $user_id = (substr($key, 16));
    $data = unserialize($row->data);
    \Drupal::service('user.data')->set('autologout', $user_id, 'timeout', $data['timeout']);
    \Drupal::service('user.data')->set('autologout', $user_id, 'enabled', $data['enabled']);
    $sandbox['current']++;
  }
  $sandbox['#finished'] = empty($sandbox['max']) ? 1 : ($sandbox['current'] / $sandbox['max']);
  if ($sandbox['#finished'] >= 1) {
    return t('Autologout settings are successfully updated. Updated @users', ["@users" => $sandbox['max']]);
  }
}