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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\path\Plugin\Field\FieldWidget\PathWidget. | |
| */ | |
| namespace Drupal\path\Plugin\Field\FieldWidget; | |
| use Drupal\Core\Field\FieldItemListInterface; | |
| use Drupal\Core\Field\WidgetBase; | |
| use Drupal\Core\Form\FormStateInterface; | |
| use Drupal\Core\Language\LanguageInterface; | |
| use Symfony\Component\Validator\ConstraintViolationInterface; | |
| /** | |
| * Plugin implementation of the 'path' widget. | |
| * | |
| * @FieldWidget( | |
| * id = "path", | |
| * label = @Translation("URL alias"), | |
| * field_types = { | |
| * "path" | |
| * } | |
| * ) | |
| */ | |
| class PathWidget extends WidgetBase { | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) { | |
| $entity = $items->getEntity(); | |
| $path = array(); | |
| if (!$entity->isNew()) { | |
| $conditions = array('source' => '/' . $entity->urlInfo()->getInternalPath()); | |
| if ($items->getLangcode() != LanguageInterface::LANGCODE_NOT_SPECIFIED) { | |
| $conditions['langcode'] = $items->getLangcode(); | |
| } | |
| $path = \Drupal::service('path.alias_storage')->load($conditions); | |
| if ($path === FALSE) { | |
| $path = array(); | |
| } | |
| } | |
| $path += array( | |
| 'pid' => NULL, | |
| 'source' => !$entity->isNew() ? '/' . $entity->urlInfo()->getInternalPath() : NULL, | |
| 'alias' => '', | |
| 'langcode' => $items->getLangcode(), | |
| ); | |
| $element += array( | |
| '#element_validate' => array(array(get_class($this), 'validateFormElement')), | |
| ); | |
| $element['alias'] = array( | |
| '#type' => 'textfield', | |
| '#title' => $element['#title'], | |
| '#default_value' => $path['alias'], | |
| '#required' => $element['#required'], | |
| '#maxlength' => 255, | |
| '#description' => $this->t('The alternative URL for this content. Use a relative path. For example, enter "/about" for the about page.'), | |
| ); | |
| $element['pid'] = array( | |
| '#type' => 'value', | |
| '#value' => $path['pid'], | |
| ); | |
| $element['source'] = array( | |
| '#type' => 'value', | |
| '#value' => $path['source'], | |
| ); | |
| $element['langcode'] = array( | |
| '#type' => 'value', | |
| '#value' => $path['langcode'], | |
| ); | |
| return $element; | |
| } | |
| /** | |
| * Form element validation handler for URL alias form element. | |
| * | |
| * @param array $element | |
| * The form element. | |
| * @param \Drupal\Core\Form\FormStateInterface $form_state | |
| * The form state. | |
| */ | |
| public static function validateFormElement(array &$element, FormStateInterface $form_state) { | |
| // Trim the submitted value of whitespace and slashes. | |
| $alias = rtrim(trim($element['alias']['#value']), " \\/"); | |
| if (!empty($alias)) { | |
| $form_state->setValueForElement($element['alias'], $alias); | |
| // Validate that the submitted alias does not exist yet. | |
| $is_exists = \Drupal::service('path.alias_storage')->aliasExists($alias, $element['langcode']['#value'], $element['source']['#value']); | |
| if ($is_exists) { | |
| $form_state->setError($element, t('The alias is already in use.')); | |
| } | |
| } | |
| if ($alias && $alias[0] !== '/') { | |
| $form_state->setError($element, t('The alias needs to start with a slash.')); | |
| } | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function errorElement(array $element, ConstraintViolationInterface $violation, array $form, FormStateInterface $form_state) { | |
| return $element['alias']; | |
| } | |
| } |