public static function JsonEditorWidget::validateJsonSchema in JSON Field 8

Ensure the JSON schema is itself valid and supported by the PHP library.

Parameters

$element:

\Drupal\Core\Form\FormStateInterface $form_state:

File

src/Plugin/Field/FieldWidget/JsonEditorWidget.php, line 192

Class

JsonEditorWidget

Plugin implementation of the 'json_editor' widget.

Namespace

Drupal\json_field\Plugin\Field\FieldWidget

Code

public static function validateJsonSchema($element, FormStateInterface $form_state) {
  try {

    // Do not use Json::decode since it forces a return as Array.
    $value = json_decode($element['#value']);

    // If the schema is empty do not try to validate as it will always fail
    // and it will not be possible to save the form.
    if (!empty($value)) {
      $schema = Schema::import($value);
    }
  } catch (\Exception $e) {
    $form_state
      ->setError($element, t('JSON Schema is not valid.'));
  }
}