ConfigSync::buildForm

public ConfigSync::buildForm(array $form, FormStateInterface $form_state)

public function buildForm(array $form, FormStateInterface $form_state) {
  $form['actions'] = array('#type' => 'actions');
  $form['actions']['submit'] = array(
    '#type' => 'submit',
    '#value' => $this->t('Import all'),
  );
  $source_list = $this->syncStorage->listAll();
  $storage_comparer = new StorageComparer($this->syncStorage, $this->activeStorage, $this->configManager);
  if (empty($source_list) || !$storage_comparer->createChangelist()->hasChanges()) {
    $form['no_changes'] = array(
      '#type' => 'table',
      '#header' => array($this->t('Name'), $this->t('Operations')),
      '#rows' => array(),
      '#empty' => $this->t('There are no configuration changes to import.'),
    );
    $form['actions']['#access'] = FALSE;
    return $form;
  }
  elseif (!$storage_comparer->validateSiteUuid()) {
    drupal_set_message($this->t('The staged configuration cannot be imported, because it originates from a different site than this site. You can only synchronize configuration between cloned instances of this site.'), 'error');
    $form['actions']['#access'] = FALSE;
    return $form;
  }
  // A list of changes will be displayed, so check if the user should be
  // warned of potential losses to configuration.
  if ($this->snapshotStorage->exists('core.extension')) {
    $snapshot_comparer = new StorageComparer($this->activeStorage, $this->snapshotStorage, $this->configManager);
    if (!$form_state->getUserInput() && $snapshot_comparer->createChangelist()->hasChanges()) {
      $change_list = array();
      foreach ($snapshot_comparer->getAllCollectionNames() as $collection) {
        foreach ($snapshot_comparer->getChangelist(NULL, $collection) as $config_names) {
          if (empty($config_names)) {
            continue;
          }
          foreach ($config_names as $config_name) {
            $change_list[] = $config_name;
          }
        }
      }
      sort($change_list);
      $message = [
        [
          '#markup' => $this->t('The following items in your active configuration have changes since the last import that may be lost on the next import.')
        ],
        [
          '#theme' => 'item_list',
          '#items' => $change_list,
        ]
      ];
      drupal_set_message($this->renderer->renderPlain($message), 'warning');
    }
  }

  // Store the comparer for use in the submit.
  $form_state->set('storage_comparer', $storage_comparer);

  // Add the AJAX library to the form for dialog support.
  $form['#attached']['library'][] = 'core/drupal.dialog.ajax';

  foreach ($storage_comparer->getAllCollectionNames() as $collection) {
    if ($collection != StorageInterface::DEFAULT_COLLECTION) {
      $form[$collection]['collection_heading'] = array(
        '#type' => 'html_tag',
        '#tag' => 'h2',
        '#value' => $this->t('@collection configuration collection', array('@collection' => $collection)),
      );
    }
    foreach ($storage_comparer->getChangelist(NULL, $collection) as $config_change_type => $config_names) {
      if (empty($config_names)) {
        continue;
      }

      // @todo A table caption would be more appropriate, but does not have the
      //   visual importance of a heading.
      $form[$collection][$config_change_type]['heading'] = array(
        '#type' => 'html_tag',
        '#tag' => 'h3',
      );
      switch ($config_change_type) {
        case 'create':
          $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count new', '@count new');
          break;

        case 'update':
          $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count changed', '@count changed');
          break;

        case 'delete':
          $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count removed', '@count removed');
          break;

        case 'rename':
          $form[$collection][$config_change_type]['heading']['#value'] = $this->formatPlural(count($config_names), '@count renamed', '@count renamed');
          break;
      }
      $form[$collection][$config_change_type]['list'] = array(
        '#type' => 'table',
        '#header' => array($this->t('Name'), $this->t('Operations')),
      );

      foreach ($config_names as $config_name) {
        if ($config_change_type == 'rename') {
          $names = $storage_comparer->extractRenameNames($config_name);
          $route_options = array('source_name' => $names['old_name'], 'target_name' => $names['new_name']);
          $config_name = $this->t('@source_name to @target_name', array('@source_name' => $names['old_name'], '@target_name' => $names['new_name']));
        }
        else {
          $route_options = array('source_name' => $config_name);
        }
        if ($collection != StorageInterface::DEFAULT_COLLECTION) {
          $route_name = 'config.diff_collection';
          $route_options['collection'] = $collection;
        }
        else {
          $route_name = 'config.diff';
        }
        $links['view_diff'] = array(
          'title' => $this->t('View differences'),
          'url' => Url::fromRoute($route_name, $route_options),
          'attributes' => array(
            'class' => array('use-ajax'),
            'data-dialog-type' => 'modal',
            'data-dialog-options' => json_encode(array(
              'width' => 700
            )),
          ),
        );
        $form[$collection][$config_change_type]['list']['#rows'][] = array(
          'name' => $config_name,
          'operations' => array(
            'data' => array(
              '#type' => 'operations',
              '#links' => $links,
            ),
          ),
        );
      }
    }
  }
  return $form;
}