UserMailRequiredValidator.php in Drupal 9

Namespace

Drupal\user\Plugin\Validation\Constraint

File

core/modules/user/src/Plugin/Validation/Constraint/UserMailRequiredValidator.php

<?php

namespace Drupal\user\Plugin\Validation\Constraint;

use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Constraint;

/**
 * Checks if the user's email address is provided if required.
 *
 * The user mail field is NOT required if account originally had no mail set
 * and the user performing the edit has 'administer users' permission.
 * This allows users without email address to be edited and deleted.
 */
class UserMailRequiredValidator extends ConstraintValidator {

  /**
   * {@inheritdoc}
   */
  public function validate($items, Constraint $constraint) {

    /** @var \Drupal\Core\Field\FieldItemListInterface $items */

    /** @var \Drupal\user\UserInterface $account */
    $account = $items
      ->getEntity();
    if (!isset($account)) {
      return;
    }
    $existing_value = NULL;

    // Only validate for existing user.
    if (!$account
      ->isNew()) {
      $account_unchanged = \Drupal::entityTypeManager()
        ->getStorage('user')
        ->loadUnchanged($account
        ->id());
      $existing_value = $account_unchanged
        ->getEmail();
    }
    $required = !(!$existing_value && \Drupal::currentUser()
      ->hasPermission('administer users'));
    if ($required && (!isset($items) || $items
      ->isEmpty())) {
      $this->context
        ->addViolation($constraint->message, [
        '@name' => $account
          ->getFieldDefinition('mail')
          ->getLabel(),
      ]);
    }
  }

}

Classes

Name	Description
UserMailRequiredValidator	Checks if the user's email address is provided if required.