/**
* {@inheritdoc}
*/
public function form(array $form, FormStateInterface $form_state)
{
$form['label'] = array('#type' => 'textfield', '#title' => 'Name', '#maxlength' => 100, '#description' => t('Name of the date format'), '#default_value' => $this->entity->label());
$form['id'] = array('#type' => 'machine_name', '#description' => t('A unique machine-readable name. Can only contain lowercase letters, numbers, and underscores.'), '#disabled' => !$this->entity->isNew(), '#default_value' => $this->entity->id(), '#machine_name' => array('exists' => array($this, 'exists'), 'replace_pattern' => '([^a-z0-9_]+)|(^custom$)', 'error' => $this->t('The machine-readable name must be unique, and can only contain lowercase letters, numbers, and underscores. Additionally, it can not be the reserved word "custom".')));
$form['date_format_pattern'] = array('#type' => 'textfield', '#title' => t('Format string'), '#maxlength' => 100, '#description' => $this->t('A user-defined date format. See the <a href="http://php.net/manual/function.date.php">PHP manual</a> for available options.'), '#required' => TRUE, '#attributes' => ['data-drupal-date-formatter' => 'source'], '#field_suffix' => ' <small class="js-hide" data-drupal-date-formatter="preview">' . $this->t('Displayed as %date_format', ['%date_format' => '']) . '</small>');
$form['langcode'] = array('#type' => 'language_select', '#title' => t('Language'), '#languages' => LanguageInterface::STATE_ALL, '#default_value' => $this->entity->language()->getId());
$form['#attached']['drupalSettings']['dateFormats'] = $this->dateFormatter->getSampleDateFormats();
$form['#attached']['library'][] = 'system/drupal.system.date';
return parent::form($form, $form_state);
}
