ServiceFilter.php

<?php

namespace Drupal\thomas_service\Form;

use Drupal\Component\Serialization\Json;
use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\taxonomy\Entity\Term;
use Drupal\thomas_service\Entity\ServiceCenter;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Drupal\Core\Entity\Query\QueryFactory;

/**
 * Class ServiceFilter.
 *
 * @package Drupal\thomas_service\Form
 */
class ServiceFilter extends FormBase {

  protected $entity_query;

  protected $city_storage;

  protected $sc_storage;


  public function __construct(QueryFactory $entity_query, EntityStorageInterface $sc_storage) {
    $this->entity_query = $entity_query;
    $this->sc_storage = $sc_storage;
  }

  public static function create(ContainerInterface $container) {
    return new static(
      $container->get('entity.query'),
      $container->get('entity.manager')->getStorage('service_center')
    );
  }

  protected function getCityList() {
    return $this->entity_query->getAggregate('service_center')
      ->condition('status', 1)
      ->groupBy('field_city')
      ->aggregate('id', 'COUNT')
      ->execute();
  }

  protected function getCitySelect() {
    $list = $this->getCityList();
   // dpm($list);
    $select = [];
    foreach ($list as $key => $item) {
      $tid = $item['field_city_target_id'];
      $term = Term::load($tid);
      $select[$tid] = $term->label();
    }
    return $select;
  }


  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'service_filter';
  }

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {

    $default_city = 2;
    $attached = [];
    $attached['drupalSettings']['thomas_service']['ServiceCenterItems'] = $this->getServiceCenters();
    //$form['#attached'] = $attached;
    $form['city'] = array(
      '#type' => 'select',
      '#title' => $this->t('City'),
      '#options' => $this->getCitySelect(),
      '#default_value' => $default_city,
      '#size' => 1,
      '#ajax' => [
        // Could also use [ $this, 'colorCallback'].
        'callback' => '::cityCallback',
        'wrapper' => 'scm-wrapper-list',
      ],
      '#attached' => $attached,
    );

    $form['scm_wrapper'] = [
      '#type' => 'container',
      '#attributes' => ['id' => 'scm-wrapper'],
    ];
    $form['scm_wrapper']['map'] = [
      '#type' => 'markup',
      '#markup' => '<div id="ssc-map" style="height: 490px; width: 100%"></div>',
      '#attached' => [
        'library' => ['thomas_service/thomas_service_map'],
      ],
    ];
    $form['scm_wrapper_list'] = [
      '#type' => 'container',
      '#attributes' => ['id' => 'scm-wrapper-list'],
    ];
/*
    $form['submit'] = array(
        '#type' => 'submit',
        '#value' => t('Submit'),
    );
*/
    return $form;
  }

  /**
    * {@inheritdoc}
    */
  public function validateForm(array &$form, FormStateInterface $form_state) {
    parent::validateForm($form, $form_state);
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    // Display result.
    foreach ($form_state->getValues() as $key => $value) {
        drupal_set_message($key . ': ' . $value);
    }

  }

  /**
   * Implements callback for Ajax event on color selection.
   *
   * @param array $form
   *   From render array.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   Current state of form.
   *
   * @return array
   *   Color selection section of the form.
   */
  public function cityCallback(array &$form, FormStateInterface $form_state) {
    $city = $form_state->getValue('city');

  //  drupal_set_message($city, 'city');
    $attached = [];
    $data = $this->getServiceCenterByCity($city);
    $attached['drupalSettings']['thomas_service']['ServiceCenterItems'] = $data;

    $items = $data[$city]['data'];
  //  dpm($data, 'items');
    $count = count($items);
    $output = '<div id="sc-list"><div class="sc-list-count">Сервис центров в городе: ' . $count . '</div><ol>';
    foreach ($items as $item)  {
      $output .= '<li class="sc-item"><span class="sc-name">' . $item['name'] . '</span> <b>Телефоны:</b>' . $item['telephones'] . ' <b>Адрес:</b> ' . $item['address'].'</li>';

    }
    $output .= '</ol></div>';

    $form['scm_wrapper_list']['list'] = [
      '#type' => 'markup',
      '#markup' => $output,
      '#attached' => $attached,
    ];

    return $form['scm_wrapper_list'];
  }

  protected function getServiceCenterByCity($city) {

    $data = [];
    $service_ids = $this->entity_query->get('service_center')
      ->condition('status', 1)
      ->condition('field_city', $city)
      ->execute();

    $services = $this->sc_storage->loadMultiple($service_ids);
    $json = [
      'type' => 'FeatureCollection',
      'features' => [],
    ];

    foreach ($services as $id => $entity) {
      $data[$id] = [
        'id' => $entity->id(),
        'name' => $entity->label(),
        'gps' => [$entity->field_geo_lon->value, $entity->field_geo_lat->value],
        'telephones' => $entity->field_telephones->value,
        'address' => $entity->field_adres->value,
      ];


      $json_item = [
        'type' => 'Feature',
        'id' => $entity->id(),
        'geometry' => [
          'type' => 'Point',
          'coordinates' => [$entity->field_geo_lon->value, $entity->field_geo_lat->value],
        ],
        'properties' => [
          'balloonContent' => $entity->field_telephones->value,
          'clusterCaption' => $entity->label(),
          'hintContent' => $entity->label(),
        ],
      ];
      $json['features'][] = $json_item;
    }

    //dpm($services, 'se');
    return [$city => [
      'data' =>  $data,
      'json' => Json::encode($json),
    ]];
  }

  protected function getServiceCenters() {
    $list = $this->getCityList();
    // dpm($list);
   $centers = [];
    foreach ($list as $key => $item) {
      $tid = $item['field_city_target_id'];
      $center = $this->getServiceCenterByCity($tid);
      $centers[$tid] = $center[$tid];
    }
    return $centers;
  }

}