function ThemeExperimentalConfirmForm::buildForm

Overrides ConfirmFormBase::buildForm

File

core/modules/system/src/Form/ThemeExperimentalConfirmForm.php, line 96

Class

ThemeExperimentalConfirmForm

Builds a confirmation form for enabling experimental themes.

Namespace

Code

public function buildForm(array $form, FormStateInterface $form_state) {
  $theme = $form_state->getBuildInfo()['args'][0] ? $form_state->getBuildInfo()['args'][0] : NULL;
  $all_themes = $this->themeList
    ->getList();
  if (!isset($all_themes[$theme])) {
    return $this->redirect('system.themes_page');
  }
  $this->messenger()
    ->addWarning($this->t('Experimental themes are provided for testing purposes only. Use at your own risk.'));
  $dependencies = array_keys($all_themes[$theme]->requires);
  $themes = array_merge([
    $theme,
  ], $dependencies);
  $is_experimental = function ($theme) use ($all_themes) {
    return isset($all_themes[$theme]) && $all_themes[$theme]->isExperimental();
  };
  $get_label = function ($theme) use ($all_themes) {
    return $all_themes[$theme]->info['name'];
  };
  $items = [];
  if (!empty($dependencies)) {
    // Display a list of required themes that have to be installed as well.
    $items[] = $this->formatPlural(count($dependencies), 'You must install the @required theme to install @theme.', 'You must install the @required themes to install @theme.', [
      '@theme' => $get_label($theme),
      // It is safe to implode this because theme names are not translated
      // markup and so will not be double-escaped.
'@required' => implode(', ', array_map($get_label, $dependencies)),
    ]);
  }
  // Add the list of experimental themes after any other messages.
  $items[] = $this->t('The following themes are experimental: @themes', [
    '@themes' => implode(', ', array_map($get_label, array_filter($themes, $is_experimental))),
  ]);
  $form['message'] = [
    '#theme' => 'item_list',
    '#items' => $items,
  ];
  return parent::buildForm($form, $form_state);
}