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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']; | |
} | |
} |