--- /dev/null
+<?php
+
+namespace Drupal\redirect\Plugin\Field\FieldWidget;
+
+use Drupal\Component\Utility\UrlHelper;
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\Core\Field\WidgetBase;
+use Drupal\Core\Url;
+use Drupal\Core\Form\FormStateInterface;
+use Symfony\Component\Routing\Exception\ResourceNotFoundException;
+
+/**
+ * Plugin implementation of the 'link' widget for the redirect module.
+ *
+ * Note that this field is meant only for the source field of the redirect
+ * entity as it drops validation for non existing paths.
+ *
+ * @FieldWidget(
+ * id = "redirect_source",
+ * label = @Translation("Redirect source"),
+ * field_types = {
+ * "link"
+ * },
+ * settings = {
+ * "placeholder_url" = "",
+ * "placeholder_title" = ""
+ * }
+ * )
+ */
+class RedirectSourceWidget extends WidgetBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
+ $default_url_value = $items[$delta]->path;
+ if ($items[$delta]->query) {
+ $default_url_value .= '?' . http_build_query($items[$delta]->query);
+ }
+ $element['path'] = array(
+ '#type' => 'textfield',
+ '#title' => $this->t('Path'),
+ '#placeholder' => $this->getSetting('placeholder_url'),
+ '#default_value' => $default_url_value,
+ '#maxlength' => 2048,
+ '#required' => $element['#required'],
+ '#field_prefix' => Url::fromRoute('<front>', array(), array('absolute' => TRUE))->toString(),
+ '#attributes' => array('data-disable-refocus' => 'true'),
+ );
+
+ // If creating new URL add checks.
+ if ($items->getEntity()->isNew()) {
+ $element['status_box'] = array(
+ '#prefix' => '<div id="redirect-link-status">',
+ '#suffix' => '</div>',
+ );
+
+ $source_path = $form_state->getValue(array('redirect_source', 0, 'path'));
+ if ($source_path) {
+ $source_path = trim($source_path);
+
+ // Warning about creating a redirect from a valid path.
+ // @todo - Hmm... exception driven logic. Find a better way how to
+ // determine if we have a valid path.
+ try {
+ \Drupal::service('router')->match('/' . $form_state->getValue(array('redirect_source', 0, 'path')));
+ $element['status_box'][]['#markup'] = '<div class="messages messages--warning">' . t('The source path %path is likely a valid path. It is preferred to <a href="@url-alias">create URL aliases</a> for existing paths rather than redirects.',
+ array('%path' => $source_path, '@url-alias' => Url::fromRoute('path.admin_add')->toString())) . '</div>';
+ }
+ catch (ResourceNotFoundException $e) {
+ // Do nothing, expected behaviour.
+ }
+
+ // Warning about the path being already redirected.
+ $parsed_url = UrlHelper::parse($source_path);
+ $path = isset($parsed_url['path']) ? $parsed_url['path'] : NULL;
+ if (!empty($path)) {
+ /** @var \Drupal\redirect\RedirectRepository $repository */
+ $repository = \Drupal::service('redirect.repository');
+ $redirects = $repository->findBySourcePath($path);
+ if (!empty($redirects)) {
+ $redirect = array_shift($redirects);
+ $element['status_box'][]['#markup'] = '<div class="messages messages--warning">' . t('The base source path %source is already being redirected. Do you want to <a href="@edit-page">edit the existing redirect</a>?', array('%source' => $source_path, '@edit-page' => $redirect->url('edit-form'))) . '</div>';
+ }
+ }
+ }
+
+ $element['path']['#ajax'] = array(
+ 'callback' => 'redirect_source_link_get_status_messages',
+ 'wrapper' => 'redirect-link-status',
+ );
+ }
+
+ return $element;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function massageFormValues(array $values, array $form, FormStateInterface $form_state) {
+ $values = parent::massageFormValues($values, $form, $form_state);
+ // It is likely that the url provided for this field is not existing and
+ // so the logic in the parent method did not set any defaults. Just run
+ // through all url values and add defaults.
+ foreach ($values as &$value) {
+ if (!empty($value['path'])) {
+ // In case we have query process the url.
+ if (strpos($value['path'], '?') !== FALSE) {
+ $url = UrlHelper::parse($value['path']);
+ $value['path'] = $url['path'];
+ $value['query'] = $url['query'];
+ }
+ }
+ }
+ return $values;
+ }
+}