Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/views_ui/src/ParamConverter/ViewUIConverter.php

@@ -0,0 +1,93 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\views_ui\ParamConverter\ViewUIConverter.
+ */
+
+namespace Drupal\views_ui\ParamConverter;
+
+use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\ParamConverter\EntityConverter;
+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 EntityConverter implements ParamConverterInterface {
+
+  /**
+   * Stores the tempstore factory.
+   *
+   * @var \Drupal\user\SharedTempStoreFactory
+   */
+  protected $tempStoreFactory;
+
+  /**
+   * Constructs a new ViewUIConverter.
+   *
+   * @param \Drupal\user\SharedTempStoreFactory $temp_store_factory
+   *   The factory for the temp store object.
+   */
+  public function __construct(EntityManagerInterface $entity_manager, SharedTempStoreFactory $temp_store_factory) {
+    parent::__construct($entity_manager);
+
+    $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;
+  }
+
+}