function user_requirements

Implements hook_requirements().

File

core/modules/user/user.install, line 99

Code

function user_requirements($phase) : array {
  if ($phase !== 'runtime') {
    return [];
  }
  $return = [];
  $result = (bool) \Drupal::entityQuery('user')->accessCheck(FALSE)
    ->condition('uid', 0)
    ->range(0, 1)
    ->execute();
  if ($result === FALSE) {
    $return['anonymous user'] = [
      'title' => t('Anonymous user'),
      'description' => t('The anonymous user does not exist. See the <a href=":url">restore the anonymous (user ID 0) user record</a> for more information', [
        ':url' => 'https://www.drupal.org/node/1029506',
      ]),
      'severity' => REQUIREMENT_WARNING,
    ];
  }
  $query = \Drupal::database()->select('users_field_data');
  $query->addExpression('LOWER(mail)', 'lower_mail');
  $query->groupBy('lower_mail');
  $query->having('COUNT(uid) > :matches', [
    ':matches' => 1,
  ]);
  $conflicts = $query->countQuery()
    ->execute()
    ->fetchField();
  if ($conflicts > 0) {
    $return['conflicting emails'] = [
      'title' => t('Conflicting user emails'),
      'description' => t('Some user accounts have email addresses that differ only by case. For example, one account might have alice@example.com and another might have Alice@Example.com. See <a href=":url">Conflicting User Emails</a> for more information.', [
        ':url' => 'https://www.drupal.org/node/3486109',
      ]),
      'severity' => REQUIREMENT_WARNING,
    ];
  }
  return $return;
}