ValidJSONConstraintValidator.php in JSON Field 8

Namespace

Drupal\json_field\Plugin\Validation\Constraint

File

src/Plugin/Validation/Constraint/ValidJSONConstraintValidator.php

<?php

namespace Drupal\json_field\Plugin\Validation\Constraint;

use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Serializer\Encoder\DecoderInterface;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;

/**
 * Checks if JSON values are valid.
 */
class ValidJSONConstraintValidator extends ConstraintValidator implements ContainerInjectionInterface {

  /**
   * The serializer which serializes the views result.
   *
   * @var \Symfony\Component\Serializer\Encoder\DecoderInterface
   */
  protected $serializer;

  /**
   * Constructs a ValidJSONConstraintValidator object.
   *
   * @param \Symfony\Component\Serializer\Encoder\DecoderInterface $serializer
   */
  public function __construct(DecoderInterface $serializer) {
    $this->serializer = $serializer;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container
      ->get('serializer'));
  }

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

    // Empty should be handled by the field settings.
    if (empty($value->value)) {
      return;
    }
    try {
      $this->serializer
        ->decode($value->value, 'json');
    } catch (\Exception $e) {

      // Add a constraint violation with the `json_decode` message on failure.
      $this->context
        ->addViolation($constraint->message, [
        '@error' => $e
          ->getMessage(),
      ]);
    }
  }

}

Classes

Name	Description
ValidJSONConstraintValidator	Checks if JSON values are valid.