AutocompleteTextfieldWidget.php

<?php

declare(strict_types = 1);

namespace Drupal\upd_list_pages_autocomplete\Plugin\facets\widget;

use Drupal\Core\Url;
use Drupal\facets\FacetInterface;
use Drupal\facets\Result\ResultInterface;
use Drupal\oe_list_pages\FacetManipulationTrait;
use Drupal\oe_list_pages\Plugin\facets\widget\ListPagesWidgetBase;

/**
 * A widget that provides a textfield for autocomplete facet results.
 *
 * @FacetsWidget(
 *   id = "upd_list_pages_textfield_autocomplete",
 *   label = @Translation("List pages textfield autocomplete"),
 *   description= @Translation("An autocomplete textfield widget for oe_list_pages."),
 * )
 */
class AutocompleteTextfieldWidget extends ListPagesWidgetBase {

  use FacetManipulationTrait;

  /**
   * {@inheritdoc}
   *
   * @SuppressWarnings(PHPMD.CyclomaticComplexity)
   * @SuppressWarnings(PHPMD.NPathComplexity)
   */
  public function build(FacetInterface $facet) {
    /** @var \Drupal\facets\Result\Result[] $results */
    $results = $facet->getResults();
    $items = $autocomplete_values = $automplete_urls = [];
    $configuration = $facet->getWidget()['config'];
    $this->showNumbers = empty($configuration['show_numbers']) ? FALSE : (bool) $configuration['show_numbers'];
    foreach ($results as $result) {
      if (is_null($result->getUrl())) {
        $text = $this->generateValues($result);
        $items[$facet->getFieldIdentifier()][] = $text;
      }
      else {
        $autocomplete_values[$result->getRawValue()] = $result->getDisplayValue() . ($this->showNumbers ? ' (' . $result->getCount() . ')' : '');
        $url = $result->getUrl()->toString();
        $automplete_urls[$result->getDisplayValue() . ($this->showNumbers ? ' (' . $result->getCount() . ')' : '')] = $url;
      }
    }
    // Get reset URL, if option is checked.
    $reset_url = NULL;
    if ($configuration['show_reset_link']
      && (!$configuration['hide_reset_when_no_selection'] || $facet->getActiveItems())
    ) {
      $urlProcessorManager = \Drupal::service('plugin.manager.facets.url_processor');
      $url_processor = $urlProcessorManager->createInstance($facet->getFacetSourceConfig()
        ->getUrlProcessorName(), ['facet' => $facet]);
      $request = \Drupal::request();
      $reset_url = Url::createFromRequest($request);
      $params = $request->query->all();
      unset($params[$url_processor->getFilterKey()]);
      $reset_url->setOption('query', $params);
      $reset_url = $reset_url->toString();
    }
    $active = $facet->getActiveItems();
    $default_value = '';
    if (isset($active[0])) {
      $default_value = $autocomplete_values[$active[0]] ?? '';
    }
    $default_value = $this->getValueFromActiveFilters($facet, '0');
    // Add librarys and everything to js.
    $build['#attached']['library'][] = 'upd_list_pages_autocomplete/drupal.upd_list_pages_autocomplete.autocomplete';
    $build['#attached']['drupalSettings']['upd_list_pages_autocomplete']['autocomplete_widget'][$facet->id()] = [
      'results' => $autocomplete_values,
      'urls' => $automplete_urls,
      'default_value' => $default_value,
      'reset_url' => $reset_url,
    ];
    $build[$facet->id()] = [
      '#type' => 'textfield',
      '#title' => $facet->label(),
      '#attributes' => [
        'class' => ['autocomplete-facet'],
        'data-id' => [$facet->id()],
        'id' => [$facet->id()],
      ],
      '#default_value' => $default_value,
    ];
    return $build;
  }

  /**
   * Prepares the URL and values for the facet.
   *
   * @param \Drupal\facets\Result\ResultInterface $result
   *   A result item.
   *
   * @return array
   *   The results.
   */
  protected function prepare(ResultInterface $result) {
    $values = $this->generateValues($result);
    if (is_null($result->getUrl())) {
      $facet_values = $values;
    }
    else {
      $facet_values['url'] = $result->getUrl()->setAbsolute()->toString();
      $facet_values['values'] = $values;
    }
    return $facet_values;
  }

  /**
   * Generates the value and the url.
   *
   * @param \Drupal\facets\Result\ResultInterface $result
   *   The result to extract the values.
   *
   * @return array
   *   The values.
   */
  protected function generateValues(ResultInterface $result) {
    $values['value'] = $result->getDisplayValue();
    if ($this->getConfiguration()['show_numbers'] && $result->getCount() !== FALSE) {
      $values['count'] = $result->getCount();
    }
    if ($result->isActive()) {
      $values['active'] = 'TRUE';
    }
    return $values;
  }

}