protected static function WebformMultiple::validateUniqueKeys in Webform 8.5

Same name and namespace in other branches

1. 6.x src/Element/WebformMultiple.php \Drupal\webform\Element\WebformMultiple::validateUniqueKeys()

Validate composite element has unique keys.

Parameters

array $element: The multiple element.

array $values: An array containing of item and weight.

Return value

null|string NULL if element has unique keys, else an error message with the duplicate key.

1 call to WebformMultiple::validateUniqueKeys()

WebformMultiple::validateWebformMultiple in src/Element/WebformMultiple.php

Validates webform multiple element.

File

src/Element/WebformMultiple.php, line 1051

Class

WebformMultiple

Provides a webform element to assist in creation of multiple elements.

Namespace

Drupal\webform\Element

Code

protected static function validateUniqueKeys(array $element, array $values) {

  // Only validate if the element's #key is defined.
  if (!isset($element['#key'])) {
    return NULL;
  }
  $unique_keys = [];
  foreach ($values as $value) {
    $item = static::convertValueToItem($value);
    $key_name = $element['#key'];
    $key_value = $item[$key_name];

    // Skip empty key and item.
    unset($item[$key_name]);
    if (empty($key_value) && static::isEmpty($item)) {
      continue;
    }
    if (isset($unique_keys[$key_value])) {
      $elements = WebformElementHelper::getFlattened($element['#element']);
      $key_title = isset($elements[$key_name]['#title']) ? $elements[$key_name]['#title'] : $key_name;
      $t_args = [
        '@key' => $key_value,
        '%title' => $key_title,
      ];
      return t("The %title '@key' is already in use. It must be unique.", $t_args);
    }
    $unique_keys[$key_value] = $key_value;
  }
  return NULL;
}