ContactEmailUniqueValidator.php in RedHen CRM 8

Namespace

Drupal\redhen_contact\Plugin\Validation\Constraint

File

modules/redhen_contact/src/Plugin/Validation/Constraint/ContactEmailUniqueValidator.php

<?php

namespace Drupal\redhen_contact\Plugin\Validation\Constraint;

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

/**
 * Validates that a field is unique for the given entity type.
 */
class ContactEmailUniqueValidator extends ConstraintValidator {

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

    // Get Contact configuration.
    $config = \Drupal::config('redhen_contact.settings');

    // If mirroring Contacts to Drupal Users or config specifies unique email,
    // ensure email is unique.
    if ($config
      ->get('connect_users') || $config
      ->get('unique_email')) {
      $email = $this->context
        ->getValue()->value;

      // $id must not be null or the entityQuery will never return results.
      $id = $this->context
        ->getValue()
        ->getParent()
        ->getValue()->id->value === NULL ? 0 : $this->context
        ->getValue()
        ->getParent()
        ->getValue()->id->value;

      // Query to find out if email is taken.
      $email_taken = (bool) \Drupal::entityQuery('redhen_contact')
        ->condition('email', $email)
        ->condition('id', $id, '!=')
        ->execute();

      // Validation fails if email is already taken, succeeds otherwise.
      if ($email_taken) {
        $this->context
          ->addViolation($constraint->message, [
          '%value' => $email,
        ]);
      }
    }
  }

}

Classes

Name	Description
ContactEmailUniqueValidator	Validates that a field is unique for the given entity type.