eav_field-2.x-dev/src/Form/EavAttributeValueWidgetSettingsForm.php

<?php

namespace Drupal\eav_field\Form;

use Drupal\Component\Utility\NestedArray;
use Drupal\Core\Field\WidgetPluginManager;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\eav_field\Entity\EavAttributeInterface;

class EavAttributeValueWidgetSettingsForm extends FormBase {

  /**
   * {@inheritDoc}
   */
  public function getFormId(): string {
    return 'eav_attribute_value_widget_settings_form';
  }

  /**
   * {@inheritDoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state, EavAttributeInterface $eav_attribute = NULL): array {
    $form['#title'] = $this->t('Widget settings of attribute "@attribute"', ['@attribute' => $eav_attribute->getAdministrativeLabel()]);

    $field_definition = $eav_attribute->configureValueFieldDefinition();
    $widget_manager = \Drupal::service('plugin.manager.field.widget'); /** @var WidgetPluginManager $widget_manager */
    $widget = $widget_manager->getInstance([
      'field_definition' => $field_definition,
      'configuration' => [
        'type' => $eav_attribute->getValueWidgetType(),
        'settings' => $eav_attribute->getValueWidgetSettings(),
      ],
    ]);

    $form['widget_settings'] = [
      '#tree' => TRUE,
      '#parents' => ['fields', $eav_attribute->getValueFieldName(), 'settings_edit_form', 'settings'],
    ];

    if ($widget_settings_form = $widget->settingsForm($form, $form_state)) {
      $form['widget_settings'] += $widget_settings_form;
    }
    else {
      $form['widget_settings']['#markup'] = $this->t('No settings.');
    }

    $form['actions'] = [
      '#type' => 'actions',
    ];

    $form['actions']['submit'] = [
      '#type' => 'submit',
      '#value' => $this->t('Save'),
      '#button_type' => 'primary',
    ];

    return $form;
  }

  /**
   * {@inheritDoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state): void {
    $widget_settings = NestedArray::getValue($form_state->getValues(), $form['widget_settings']['#parents']);

    $attribute = $form_state->getBuildInfo()['args'][0]; /** @var EavAttributeInterface $attribute */
    $attribute->set('value_widget_settings', $widget_settings);
    $attribute->save();

    // Redirect to next step
    if ($this->getRequest()->query->get('operation') == 'add') {
      $form_state->setRedirect('entity.eav_attribute.value_formatter_form', ['eav_attribute' => $attribute->id()], ['query' => ['operation' => 'add']]);
    }
    else {
      $this->messenger()->addMessage($this->t('Widget settings saved.'));
    }
  }

}