global_gateway-8.x-1.x-dev/modules/global_gateway_country/global_gateway_country.module

<?php

/**
 * @file
 * Basic module file.
 */

use Drupal\Core\Form\FormStateInterface;

/**
 * Implements hook_field_widget_form_alter().
 */
function global_gateway_country_field_widget_form_alter(&$element, FormStateInterface $form_state, $context) {
  // Prevent country detection for the update/edit node forms
  // and translations form.
  $path = \Drupal::service('path.current')->getPath();
  if (stripos($path, '/edit') !== FALSE
    || stripos($path, '/translations') !== FALSE
  ) {
    return FALSE;
  }
  /** @var \Drupal\Core\Field\FieldItemListInterface $items */
  $items            = $context['items'];
  $field_definition = $items->getFieldDefinition();
  $settings         = $field_definition->getSettings();
  $country          = &$element['value'];

  // Don't run detection when current field isn't a country field,
  // or user set default value for widget.
  if ($field_definition->getType() != 'country'
    || empty($settings['preselect_user_region_enabled'])
    || !empty($country['#default_value'])
  ) {
    return FALSE;
  }

  // Negotiate the country code.
  $code = \Drupal::service('global_gateway_region_negotiator')
    ->negotiateRegion();

  // Workaround for the autocomplete widget.
  if (isset($country['#selectable_countries'])) {
    /** @var \Drupal\Core\StringTranslation\TranslatableMarkup $value */
    $value = $country['#selectable_countries'][$code];
    $value = $value->render();
    $code  = ['value' => $value, 'label' => $value];
  }
  $country['#default_value'] = $code;
}

/**
 * Implements hook_field_info_alter().
 */
function global_gateway_country_field_info_alter(&$info) {
  $info['country']['class']    = '\Drupal\global_gateway_country\Plugin\Field\FieldType\CountryItem';
  $info['country']['provider'] = 'global_gateway_country';
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function global_gateway_country_form_field_config_edit_form_alter(&$form) {
  // Move the preselect option checkbox to the default value container.
  if (\Drupal::routeMatch()->getParameters()->get('field_config')->getType() == 'country') {
    if (isset($form['settings']) && isset($form['settings']['preselect_user_region_enabled'])) {
      $element = $form['settings']['preselect_user_region_enabled'];
      unset($form['settings']['preselect_user_region_enabled']);
      $form['default_value']['widget'][0]['value']['#states'] = [
        'visible' => [
          ':input[name="default_value_input[preselect_user_region_enabled]"]' => [
            'checked' => FALSE,
          ],
        ],
      ];
      $form['default_value']['preselect_user_region_enabled'] = $element;
      $form['actions']['submit']['#submit'][] = [
        '\Drupal\global_gateway_country\Plugin\Field\FieldType\CountryItem',
        'submitPreselectSetting',
      ];
    }
  }
}