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<?php
/**
 * @file
 * Contains \Drupal\views_ui\Form\Ajax\ConfigHandlerGroup.
 */
namespace Drupal\views_ui\Form\Ajax;
use Drupal\Core\Form\FormStateInterface;
use Drupal\views\Views;
use Drupal\views\ViewEntityInterface;
use Drupal\views\ViewExecutable;
/**
 * Provides a form for configuring grouping information for a Views UI handler.
 */
class ConfigHandlerGroup extends ViewsFormBase {
  /**
   * Constructs a new ConfigHandlerGroup object.
   */
  public function __construct($type = NULL, $id = NULL) {
    $this->setType($type);
    $this->setID($id);
  }
  /**
   * {@inheritdoc}
   */
  public function getFormKey() {
    return 'handler-group';
  }
  /**
   * {@inheritdoc}
   */
  public function getForm(ViewEntityInterface $view, $display_id, $js, $type = NULL, $id = NULL) {
    $this->setType($type);
    $this->setID($id);
    return parent::getForm($view, $display_id, $js);
  }
  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'views_ui_config_item_group_form';
  }
  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $view = $form_state->get('view');
    $display_id = $form_state->get('display_id');
    $type = $form_state->get('type');
    $id = $form_state->get('id');
    $form = array(
      'options' => array(
        '#tree' => TRUE,
        '#theme_wrappers' => array('container'),
        '#attributes' => array('class' => array('scroll'), 'data-drupal-views-scroll' => TRUE),
      ),
    );
    $executable = $view->getExecutable();
    if (!$executable->setDisplay($display_id)) {
      $form['markup'] = array('#markup' => $this->t('Invalid display id @display', array('@display' => $display_id)));
      return $form;
    }
    $executable->initQuery();
    $item = $executable->getHandler($display_id, $type, $id);
    if ($item) {
      $handler = $executable->display_handler->getHandler($type, $id);
      if (empty($handler)) {
        $form['markup'] = array('#markup' => $this->t("Error: handler for @table > @field doesn't exist!", array('@table' => $item['table'], '@field' => $item['field'])));
      }
      else {
        $handler->init($executable, $executable->display_handler, $item);
        $types = ViewExecutable::getHandlerTypes();
        $form['#title'] = $this->t('Configure aggregation settings for @type %item', array('@type' => $types[$type]['lstitle'], '%item' => $handler->adminLabel()));
        $handler->buildGroupByForm($form['options'], $form_state);
        $form_state->set('handler', $handler);
      }
      $view->getStandardButtons($form, $form_state, 'views_ui_config_item_group_form');
    }
    return $form;
  }
  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $view = $form_state->get('view');
    $item = &$form_state->get('handler')->options;
    $type = $form_state->get('type');
    $handler = Views::handlerManager($type)->getHandler($item);
    $executable = $view->getExecutable();
    $handler->init($executable, $executable->display_handler, $item);
    $handler->submitGroupByForm($form, $form_state);
    // Store the item back on the view
    $executable->setHandler($form_state->get('display_id'), $form_state->get('type'), $form_state->get('id'), $item);
    // Write to cache
    $view->cacheSet();
  }
}