CountryAutocompleteWidget.php in Country 8

Namespace

Drupal\country\Plugin\Field\FieldWidget

File

src/Plugin/Field/FieldWidget/CountryAutocompleteWidget.php

<?php

namespace Drupal\country\Plugin\Field\FieldWidget;

use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\WidgetBase;
use Drupal\Core\Form\FormStateInterface;

/**
 * Plugin implementation of the 'country_autocomplete' widget.
 *
 * @FieldWidget(
 *   id = "country_autocomplete",
 *   label = @Translation("Country autocomplete"),
 *   field_types = {
 *     "country"
 *   }
 * )
 */
class CountryAutocompleteWidget extends WidgetBase {

  /**
   * {@inheritdoc}
   */
  public static function defaultSettings() {
    return [
      'size' => '60',
      'autocomplete_route_name' => 'country.autocomplete',
      'placeholder' => t('Start typing a country name ...'),
    ] + parent::defaultSettings();
  }

  /**
   * {@inheritdoc}
   */
  public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
    $countries = \Drupal::service('country.field.manager')
      ->getSelectableCountries($this->fieldDefinition);
    $element['value'] = $element + [
      '#type' => 'textfield',
      '#default_value' => isset($items[$delta]->value) && isset($countries[$items[$delta]->value]) ? $countries[$items[$delta]->value] : '',
      '#autocomplete_route_name' => $this
        ->getSetting('autocomplete_route_name'),
      '#autocomplete_route_parameters' => [
        'entity_type' => $this->fieldDefinition
          ->get('entity_type'),
        'bundle' => $this->fieldDefinition
          ->get('bundle'),
        'field_name' => $this->fieldDefinition
          ->get('field_name'),
      ],
      '#size' => $this
        ->getSetting('size'),
      '#placeholder' => $this
        ->getSetting('placeholder'),
      '#maxlength' => 255,
      '#selectable_countries' => $countries,
      '#element_validate' => [
        [
          $this,
          'validateElement',
        ],
      ],
    ];
    return $element;
  }

  /**
   * {@inheritdoc}
   */
  public function settingsForm(array $form, FormStateInterface $form_state) {
    $element = parent::settingsForm($form, $form_state);
    $element['size'] = [
      '#type' => 'number',
      '#title' => t('Size'),
      '#default_value' => $this
        ->getSetting('size'),
      '#required' => TRUE,
      '#min' => 20,
    ];
    $element['placeholder'] = [
      '#type' => 'textfield',
      '#title' => t('Placeholder'),
      '#default_value' => $this
        ->getSetting('placeholder'),
    ];
    return $element;
  }

  /**
   * {@inheritdoc}
   */
  public function settingsSummary() {
    $summary = [];
    $summary[] = t('Size: @size', [
      '@size' => $this
        ->getSetting('size'),
    ]);
    $summary[] = t('Placeholder: @placeholder', [
      '@placeholder' => $this
        ->getSetting('placeholder'),
    ]);
    return $summary;
  }

  /**
   * Form element validate handler for country autocomplete.
   */
  public static function validateElement($element, FormStateInterface $form_state) {
    if ($country = $element['#value']) {
      $countries = $element['#selectable_countries'];
      $iso2 = array_search($country, $countries);
      if (!empty($iso2)) {
        $form_state
          ->setValueForElement($element, $iso2);
      }
      else {
        $form_state
          ->setError($element, t('An unexpected country has been entered.'));
      }
    }
  }

}

Classes

Name	Description
CountryAutocompleteWidget	Plugin implementation of the 'country_autocomplete' widget.