/**
* {@inheritdoc}
*/
public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state)
{
$date_format = DateFormat::load('html_date')->getPattern();
$time_format = DateFormat::load('html_time')->getPattern();
$default_value = isset($items[$delta]->value) ? DrupalDateTime::createFromTimestamp($items[$delta]->value) : '';
$element['value'] = $element + array('#type' => 'datetime', '#default_value' => $default_value, '#date_year_range' => '1902:2037');
$element['value']['#description'] = $this->t('Format: %format. Leave blank to use the time of form submission.', array('%format' => Datetime::formatExample($date_format . ' ' . $time_format)));
return $element;
}
/**
* Callback function to add default time to the input date if needed.
*
* This will intercept the user input before form validation is processed.
*/
public static function valueCallback(&$element, $input, FormStateInterface $form_state)
{
if ($input !== FALSE) {
$date_input = $element['#date_date_element'] != 'none' && !empty($input['date']) ? $input['date'] : '';
$time_input = $element['#date_time_element'] != 'none' && !empty($input['time']) ? $input['time'] : '';
// If there is an input date but no time and the date-only option is on
// then set the input time to the default specified by scheduler options.
$config = \Drupal::config('scheduler.settings');
if (!empty($date_input) && empty($time_input) && $config->get('allow_date_only')) {
$input['time'] = $config->get('default_time');
}
}
// Chain on to the standard valueCallback for Datetime as we do not want to
// duplicate that core code here.
return Datetime::valueCallback($element, $input, $form_state);
}
