--- /dev/null
+<?php
+
+namespace Drupal\views_ui\ParamConverter;
+
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\ParamConverter\AdminPathConfigEntityConverter;
+use Drupal\Core\Routing\AdminContext;
+use Symfony\Component\Routing\Route;
+use Drupal\Core\ParamConverter\ParamConverterInterface;
+use Drupal\user\SharedTempStoreFactory;
+use Drupal\views_ui\ViewUI;
+
+/**
+ * Provides upcasting for a view entity to be used in the Views UI.
+ *
+ * Example:
+ *
+ * pattern: '/some/{view}/and/{bar}'
+ * options:
+ * parameters:
+ * view:
+ * type: 'entity:view'
+ * tempstore: TRUE
+ *
+ * The value for {view} will be converted to a view entity prepared for the
+ * Views UI and loaded from the views temp store, but it will not touch the
+ * value for {bar}.
+ */
+class ViewUIConverter extends AdminPathConfigEntityConverter implements ParamConverterInterface {
+
+ /**
+ * Stores the tempstore factory.
+ *
+ * @var \Drupal\user\SharedTempStoreFactory
+ */
+ protected $tempStoreFactory;
+
+ /**
+ * Constructs a new ViewUIConverter.
+ *
+ * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
+ * The entity manager.
+ * @param \Drupal\user\SharedTempStoreFactory $temp_store_factory
+ * The factory for the temp store object.
+ */
+ public function __construct(EntityManagerInterface $entity_manager, SharedTempStoreFactory $temp_store_factory, ConfigFactoryInterface $config_factory = NULL, AdminContext $admin_context = NULL) {
+ // The config factory and admin context are new arguments due to changing
+ // the parent. Avoid an error on updated sites by falling back to getting
+ // them from the container.
+ // @todo Remove in 8.2.x in https://www.drupal.org/node/2674328.
+ if (!$config_factory) {
+ $config_factory = \Drupal::configFactory();
+ }
+ if (!$admin_context) {
+ $admin_context = \Drupal::service('router.admin_context');
+ }
+ parent::__construct($entity_manager, $config_factory, $admin_context);
+
+ $this->tempStoreFactory = $temp_store_factory;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function convert($value, $definition, $name, array $defaults) {
+ if (!$entity = parent::convert($value, $definition, $name, $defaults)) {
+ return;
+ }
+
+ // Get the temp store for this variable if it needs one. Attempt to load the
+ // view from the temp store, synchronize its status with the existing view,
+ // and store the lock metadata.
+ $store = $this->tempStoreFactory->get('views');
+ if ($view = $store->get($value)) {
+ if ($entity->status()) {
+ $view->enable();
+ }
+ else {
+ $view->disable();
+ }
+ $view->lock = $store->getMetadata($value);
+ }
+ // Otherwise, decorate the existing view for use in the UI.
+ else {
+ $view = new ViewUI($entity);
+ }
+
+ return $view;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function applies($definition, $name, Route $route) {
+ if (parent::applies($definition, $name, $route)) {
+ return !empty($definition['tempstore']) && $definition['type'] === 'entity:view';
+ }
+ return FALSE;
+ }
+
+}