ProperJsonValidator.php

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<?php
 
namespace Drupal\dkan_data\Plugin\Validation\Constraint;
 
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
 
class ProperJsonValidator extends ConstraintValidator {
 
  public function validate($items, Constraint $constraint) {
    foreach ($items as $item) {
      $info = $this->isProper($item->value);
      if (!$info['valid']) {
        $this->addViolations($info['errors']);
      }
    }
  }
 
  protected function isProper($value) {
    // @codeCoverageIgnoreStart
    /* @var $saeFactory SaeFactory */
    $saeFactory = \Drupal::service("dkan_metastore.sae_factory");
 
    /* @var $engine Sae */
    $engine = $saeFactory->getInstance('dataset');
 
    return $engine->validate($value);
    // @codeCoverageIgnoreEnd
  }
 
  private function addViolations($errors) {
    foreach ($errors as $error) {
      $this->context->addViolation($error['message']);
    }
  }
 
}