--- /dev/null
+<?php
+
+namespace Drupal\entity_browser\Plugin\EntityBrowser\Widget;
+
+use Drupal\Component\Plugin\Exception\PluginNotFoundException;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Render\Element;
+use Drupal\entity_browser\WidgetBase;
+use Drupal\Core\Url;
+use Drupal\entity_browser\WidgetValidationManager;
+use Drupal\views\Entity\View as ViewEntity;
+use Drupal\views\Views;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+
+/**
+ * Uses a view to provide entity listing in a browser's widget.
+ *
+ * @EntityBrowserWidget(
+ * id = "view",
+ * label = @Translation("View"),
+ * provider = "views",
+ * description = @Translation("Uses a view to provide entity listing in a browser's widget."),
+ * auto_select = TRUE
+ * )
+ */
+class View extends WidgetBase implements ContainerFactoryPluginInterface {
+
+ /**
+ * The current user.
+ *
+ * @var \Drupal\Core\Session\AccountInterface
+ */
+ protected $currentUser;
+
+ /**
+ * {@inheritdoc}
+ */
+ public function defaultConfiguration() {
+ return array(
+ 'view' => NULL,
+ 'view_display' => NULL,
+ ) + parent::defaultConfiguration();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+ return new static(
+ $configuration,
+ $plugin_id,
+ $plugin_definition,
+ $container->get('event_dispatcher'),
+ $container->get('entity_type.manager'),
+ $container->get('plugin.manager.entity_browser.widget_validation'),
+ $container->get('current_user')
+ );
+ }
+
+ /**
+ * Constructs a new View object.
+ *
+ * @param array $configuration
+ * A configuration array containing information about the plugin instance.
+ * @param string $plugin_id
+ * The plugin_id for the plugin instance.
+ * @param mixed $plugin_definition
+ * The plugin implementation definition.
+ * @param \Symfony\Component\EventDispatcher\EventDispatcherInterface $event_dispatcher
+ * Event dispatcher service.
+ * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+ * The entity type manager.
+ * @param \Drupal\entity_browser\WidgetValidationManager $validation_manager
+ * The Widget Validation Manager service.
+ * @param \Drupal\Core\Session\AccountInterface $current_user
+ * The current user.
+ */
+ public function __construct(array $configuration, $plugin_id, $plugin_definition, EventDispatcherInterface $event_dispatcher, EntityTypeManagerInterface $entity_type_manager, WidgetValidationManager $validation_manager, AccountInterface $current_user) {
+ parent::__construct($configuration, $plugin_id, $plugin_definition, $event_dispatcher, $entity_type_manager, $validation_manager);
+ $this->currentUser = $current_user;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getForm(array &$original_form, FormStateInterface $form_state, array $additional_widget_parameters) {
+ $form = parent::getForm($original_form, $form_state, $additional_widget_parameters);
+ // TODO - do we need better error handling for view and view_display (in case
+ // either of those is nonexistent or display not of correct type)?
+ $form['#attached']['library'] = ['entity_browser/view'];
+
+ /** @var \Drupal\views\ViewExecutable $view */
+ $view = $this->entityTypeManager
+ ->getStorage('view')
+ ->load($this->configuration['view'])
+ ->getExecutable();
+
+ // Check if the current user has access to this view.
+ if (!$view->access($this->configuration['view_display'])) {
+ return [
+ '#markup' => $this->t('You do not have access to this View.'),
+ ];
+ }
+
+ if (!empty($this->configuration['arguments'])) {
+ if (!empty($additional_widget_parameters['path_parts'])) {
+ $arguments = [];
+ // Map configuration arguments with original path parts.
+ foreach ($this->configuration['arguments'] as $argument) {
+ $arguments[] = isset($additional_widget_parameters['path_parts'][$argument]) ? $additional_widget_parameters['path_parts'][$argument] : '';
+ }
+ $view->setArguments(array_values($arguments));
+ }
+ }
+
+ $form['view'] = $view->executeDisplay($this->configuration['view_display']);
+
+ if (empty($view->field['entity_browser_select'])) {
+ $url = Url::fromRoute('entity.view.edit_form', ['view' => $this->configuration['view']])->toString();
+ if ($this->currentUser->hasPermission('administer views')) {
+ return [
+ '#markup' => $this->t('Entity browser select form field not found on a view. <a href=":link">Go fix it</a>!', [':link' => $url]),
+ ];
+ }
+ else {
+ return [
+ '#markup' => $this->t('Entity browser select form field not found on a view. Go fix it!'),
+ ];
+ }
+ }
+
+ // When rebuilding makes no sense to keep checkboxes that were previously
+ // selected.
+ if (!empty($form['view']['entity_browser_select']) && $form_state->isRebuilding()) {
+ foreach (Element::children($form['view']['entity_browser_select']) as $child) {
+ $form['view']['entity_browser_select'][$child]['#process'][] = ['\Drupal\entity_browser\Plugin\EntityBrowser\Widget\View', 'processCheckbox'];
+ $form['view']['entity_browser_select'][$child]['#process'][] = ['\Drupal\Core\Render\Element\Checkbox', 'processAjaxForm'];
+ $form['view']['entity_browser_select'][$child]['#process'][] = ['\Drupal\Core\Render\Element\Checkbox', 'processGroup'];
+ }
+ }
+
+ $form['view']['view'] = [
+ '#markup' => \Drupal::service('renderer')->render($form['view']['view']),
+ ];
+
+ return $form;
+ }
+
+ /**
+ * Sets the #checked property when rebuilding form.
+ *
+ * Every time when we rebuild we want all checkboxes to be unchecked.
+ *
+ * @see \Drupal\Core\Render\Element\Checkbox::processCheckbox()
+ */
+ public static function processCheckbox(&$element, FormStateInterface $form_state, &$complete_form) {
+ $element['#checked'] = FALSE;
+ return $element;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function validate(array &$form, FormStateInterface $form_state) {
+ $user_input = $form_state->getUserInput();
+ if (isset($user_input['entity_browser_select'])) {
+ $selected_rows = array_values(array_filter($user_input['entity_browser_select']));
+ foreach ($selected_rows as $row) {
+ // Verify that the user input is a string and split it.
+ // Each $row is in the format entity_type:id.
+ if (is_string($row) && $parts = explode(':', $row, 2)) {
+ // Make sure we have a type and id present.
+ if (count($parts) == 2) {
+ try {
+ $storage = $this->entityTypeManager->getStorage($parts[0]);
+ if (!$storage->load($parts[1])) {
+ $message = $this->t('The @type Entity @id does not exist.', [
+ '@type' => $parts[0],
+ '@id' => $parts[1],
+ ]);
+ $form_state->setError($form['widget']['view']['entity_browser_select'], $message);
+ }
+ }
+ catch (PluginNotFoundException $e) {
+ $message = $this->t('The Entity Type @type does not exist.', [
+ '@type' => $parts[0],
+ ]);
+ $form_state->setError($form['widget']['view']['entity_browser_select'], $message);
+ }
+ }
+ }
+ }
+
+ // If there weren't any errors set, run the normal validators.
+ if (empty($form_state->getErrors())) {
+ parent::validate($form, $form_state);
+ }
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function prepareEntities(array $form, FormStateInterface $form_state) {
+ $selected_rows = array_values(array_filter($form_state->getUserInput()['entity_browser_select']));
+ $entities = [];
+ foreach ($selected_rows as $row) {
+ list($type, $id) = explode(':', $row);
+ $storage = $this->entityTypeManager->getStorage($type);
+ if ($entity = $storage->load($id)) {
+ $entities[] = $entity;
+ }
+ }
+ return $entities;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submit(array &$element, array &$form, FormStateInterface $form_state) {
+ $entities = $this->prepareEntities($form, $form_state);
+ $this->selectEntities($entities, $form_state);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+ $form = parent::buildConfigurationForm($form, $form_state);
+
+ $options = [];
+ // Get only those enabled Views that have entity_browser displays.
+ $displays = Views::getApplicableViews('entity_browser_display');
+ foreach ($displays as $display) {
+ list($view_id, $display_id) = $display;
+ $view = $this->entityTypeManager->getStorage('view')->load($view_id);
+ $options[$view_id . '.' . $display_id] = $this->t('@view : @display', array('@view' => $view->label(), '@display' => $view->get('display')[$display_id]['display_title']));
+ }
+
+ $form['view'] = [
+ '#type' => 'select',
+ '#title' => $this->t('View : View display'),
+ '#default_value' => $this->configuration['view'] . '.' . $this->configuration['view_display'],
+ '#options' => $options,
+ '#empty_option' => $this->t('- Select a view -'),
+ '#required' => TRUE,
+ ];
+
+ return $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
+ $values = $form_state->getValues()['table'][$this->uuid()]['form'];
+ $this->configuration['submit_text'] = $values['submit_text'];
+ $this->configuration['auto_select'] = $values['auto_select'];
+ if (!empty($values['view'])) {
+ list($view_id, $display_id) = explode('.', $values['view']);
+ $this->configuration['view'] = $view_id;
+ $this->configuration['view_display'] = $display_id;
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function calculateDependencies() {
+ $dependencies = [];
+ if ($this->configuration['view']) {
+ $view = ViewEntity::load($this->configuration['view']);
+ $dependencies[$view->getConfigDependencyKey()] = [$view->getConfigDependencyName()];
+ }
+ return $dependencies;
+ }
+
+}