public function SelectLanguageForm::buildForm in Drupal 9

Same name and namespace in other branches

1. 8 core/lib/Drupal/Core/Installer/Form/SelectLanguageForm.php \Drupal\Core\Installer\Form\SelectLanguageForm::buildForm()

Form constructor.

Parameters

array $form: An associative array containing the structure of the form.

\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form.

Return value

array The form structure.

Overrides FormInterface::buildForm

File

core/lib/Drupal/Core/Installer/Form/SelectLanguageForm.php, line 31

Class

SelectLanguageForm

Provides the language selection form.

Namespace

Drupal\Core\Installer\Form

Code

public function buildForm(array $form, FormStateInterface $form_state, $install_state = NULL) {
  if (count($install_state['translations']) > 1) {
    $files = $install_state['translations'];
  }
  else {
    $files = [];
  }
  $standard_languages = LanguageManager::getStandardLanguageList();
  $select_options = [];
  $browser_options = [];
  $form['#title'] = 'Choose language';

  // Build a select list with language names in native language for the user
  // to choose from. And build a list of available languages for the browser
  // to select the language default from.
  // Select lists based on all standard languages.
  foreach ($standard_languages as $langcode => $language_names) {
    $select_options[$langcode] = $language_names[1];
    $browser_options[$langcode] = $langcode;
  }

  // Add languages based on language files in the translations directory.
  if (count($files)) {
    foreach ($files as $langcode => $uri) {
      $select_options[$langcode] = isset($standard_languages[$langcode]) ? $standard_languages[$langcode][1] : $langcode;
      $browser_options[$langcode] = $langcode;
    }
  }
  asort($select_options);
  $request = Request::createFromGlobals();
  $browser_langcode = UserAgent::getBestMatchingLangcode($request->server
    ->get('HTTP_ACCEPT_LANGUAGE'), $browser_options);
  $form['langcode'] = [
    '#type' => 'select',
    '#title' => 'Choose language',
    '#title_display' => 'invisible',
    '#options' => $select_options,
    // Use the browser detected language as default or English if nothing found.
    '#default_value' => !empty($browser_langcode) ? $browser_langcode : 'en',
  ];
  $link_to_english = install_full_redirect_url([
    'parameters' => [
      'langcode' => 'en',
    ],
  ]);
  $form['help'] = [
    '#type' => 'item',
    // #markup is XSS admin filtered which ensures unsafe protocols will be
    // removed from the url.
    '#markup' => '<p>Translations will be downloaded from the <a href="https://localize.drupal.org/download">Drupal Translation website</a>. If you do not want this, select <a href="' . $link_to_english . '">English</a>.</p>',
    '#states' => [
      'invisible' => [
        'select[name="langcode"]' => [
          'value' => 'en',
        ],
      ],
    ],
  ];
  $form['actions'] = [
    '#type' => 'actions',
  ];
  $form['actions']['submit'] = [
    '#type' => 'submit',
    '#value' => 'Save and continue',
    '#button_type' => 'primary',
  ];
  return $form;
}