public static function MultiValue::validateMultiValue in SAML Authentication 4.x

Same name and namespace in other branches

1. 8.3 src/Element/MultiValue.php \Drupal\samlauth\Element\MultiValue::validateMultiValue()

Validates a multi-value form element.

Used to clean and sort the submitted values in the form state.

Parameters

array $element: The element being processed.

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

array $complete_form: The complete form.

File

src/Element/MultiValue.php, line 276

Class

MultiValue

Provides a multi-value form element.

Namespace

Drupal\samlauth\Element

Code

public static function validateMultiValue(array &$element, FormStateInterface $form_state, array &$complete_form) : void {
  $input_exists = FALSE;
  $values = NestedArray::getValue($form_state
    ->getValues(), $element['#parents'], $input_exists);
  if (!$input_exists) {
    return;
  }

  // Remove the 'value' of the 'add more' button.
  unset($values['add_more']);

  // Sort the values based on the weight.
  usort($values, function ($a, $b) {
    return SortArray::sortByKeyInt($a, $b, '_weight');
  });
  foreach ($values as $delta => &$delta_values) {

    // Remove the weight element value from the submitted data.
    unset($delta_values['_weight']);

    // Determine if all the elements of this delta are empty.
    $is_empty_delta = array_reduce($delta_values, function (bool $carry, $value) : bool {
      if (is_array($value)) {
        return $carry && empty(array_filter($value));
      }
      else {
        return $carry && ($value === NULL || $value === '');
      }
    }, TRUE);

    // If all the elements are empty, drop this delta.
    if ($is_empty_delta) {
      unset($values[$delta]);
    }
  }

  // Re-key the elements so that deltas are consecutive.
  $values = array_values($values);

  // Set the value back to the form state.
  $form_state
    ->setValueForElement($element, $values);
}