tckk_field-1.0.x-dev/src/Plugin/Field/FieldWidget/TCKimlikNoWidget.php

<?php

namespace Drupal\tckk_field\Plugin\Field\FieldWidget;

use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\WidgetBase;
use Drupal\Core\Form\FormStateInterface;
use Symfony\Component\Validator\ConstraintViolationInterface;

/**
 * Defines the 'tckk_field' field widget.
 *
 * @FieldWidget(
 *   id = "tckk_field",
 *   label = @Translation("T.C. Kimlik No"),
 *   field_types = {"tckk_field"},
 * )
 */
class TCKimlikNoWidget extends WidgetBase {

  /**
   * {@inheritdoc}
   */
  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {

    $element['tckk_field'] = [
      '#type'             => 'textfield',
      '#default_value'    => isset($items[$delta]->tckk_field) ? $items[$delta]->tckk_field : NULL,
      '#element_validate' => [[$this, 'validateElement']],
    ];

    $element['#theme_wrappers'] = ['container', 'form_element'];
    $element['#attributes']['class'][] = 'container-inline';
    $element['#attributes']['class'][] = 'tckk-field-elements';
    $element['#attached']['library'][] = 'tckk_field/tckk_field';

    return $element;
  }

  /**
   * {@inheritdoc}
   */
  public function errorElement(array $element, ConstraintViolationInterface $violation, array $form, FormStateInterface $form_state) {
    return isset($violation->arrayPropertyPath[0]) ? $element[$violation->arrayPropertyPath[0]] : $element;
  }

  /**
   * {@inheritDoc}
   */
  public function validateElement(array $element, FormStateInterface $form_state) {
    /** @var \Drupal\tckk_field\TckkValidator */
    $validator = \Drupal::service('tckk_field.validator');
    $value     = $element['#value'];
    if ($value !== '' && $validator->validate($value) === FALSE) {
      $form_state->setError($element, $this->t('T.C. Kimlik No is not valid'));
    }
  }

  /**
   * {@inheritdoc}
   */
  public function massageFormValues(array $values, array $form, FormStateInterface $form_state) {
    foreach ($values as $delta => $value) {
      if ($value['tckk_field'] === '') {
        $values[$delta]['tckk_field'] = NULL;
      }
    }
    return $values;
  }

}