public static function MultiStepDisplay::handleAjaxCommand in Entity Browser 8

Same name and namespace in other branches

1. 8.2 src/Plugin/EntityBrowser/SelectionDisplay/MultiStepDisplay.php \Drupal\entity_browser\Plugin\EntityBrowser\SelectionDisplay\MultiStepDisplay::handleAjaxCommand()

Handler to generate Ajax response, after command is executed.

Parameters

array $form: Form.

\Drupal\Core\Form\FormStateInterface $form_state: Form state object.

Return value

\Drupal\Core\Ajax\AjaxResponse Return Ajax response with commands.

File

src/Plugin/EntityBrowser/SelectionDisplay/MultiStepDisplay.php, line 270

Class

MultiStepDisplay

Show current selection and delivers selected entities.

Namespace

Drupal\entity_browser\Plugin\EntityBrowser\SelectionDisplay

Code

public static function handleAjaxCommand(array $form, FormStateInterface $form_state) {
  $ajax = new AjaxResponse();
  if (($triggering_element = $form_state
    ->getTriggeringElement()) && $triggering_element['#name'] === 'ajax_commands_handler' && !empty($triggering_element['#value'])) {
    $commands = json_decode($triggering_element['#value'], TRUE);

    // Entity IDs that are affected by this command.
    if (isset($commands['add'])) {

      /** @var \Drupal\Core\Render\RendererInterface $renderer */
      $renderer = \Drupal::service('renderer');
      $entity_ids = $commands['add'];
      $selected_entities =& $form_state
        ->get([
        'entity_browser',
        'selected_entities',
      ]);

      // Get entities added by this command and generate JS commands for them.
      $selected_entity_keys = array_keys($selected_entities);
      $key_index = count($selected_entity_keys) - count($entity_ids);
      foreach ($entity_ids as $entity_pair_info) {
        $last_entity_id = $selected_entities[$selected_entity_keys[$key_index]]
          ->id();
        $html = $renderer
          ->render($form['selection_display']['selected']['items_' . $last_entity_id . '_' . $selected_entity_keys[$key_index]]);
        $ajax
          ->addCommand(new ReplaceCommand('div[id="' . $entity_pair_info['proxy_id'] . '"]', static::trimSingleHtmlTag($html)));
        $key_index++;
      }

      // Check if action buttons should be added to form. When number of added
      // entities is equal to number of selected entities. Then form buttons
      // should be also rendered: use_selected and show_selection.
      if (count($selected_entities) === count($entity_ids)) {

        // Order is important, since commands are executed one after another.
        $ajax
          ->addCommand(new AfterCommand('.entities-list', static::trimSingleHtmlTag($renderer
          ->render($form['selection_display']['show_selection']))));
        $ajax
          ->addCommand(new AfterCommand('.entities-list', static::trimSingleHtmlTag($renderer
          ->render($form['selection_display']['use_selected']))));
      }
    }

    // Add Invoke command to trigger loading of entities that are queued
    // during execution of current Ajax request.
    $ajax
      ->addCommand(new InvokeCommand('[name=ajax_commands_handler]', 'trigger', [
      'execute-commands',
    ]));
  }
  return $ajax;
}