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

core/modules/rest/src/Routing/ResourceRoutes.php

@@ -0,0 +1,112 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\rest\Routing\ResourceRoutes.
+ */
+
+namespace Drupal\rest\Routing;
+
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
+use Drupal\Core\Routing\RouteSubscriberBase;
+use Drupal\rest\Plugin\Type\ResourcePluginManager;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\Routing\RouteCollection;
+
+/**
+ * Subscriber for REST-style routes.
+ */
+class ResourceRoutes extends RouteSubscriberBase {
+
+  /**
+   * The plugin manager for REST plugins.
+   *
+   * @var \Drupal\rest\Plugin\Type\ResourcePluginManager
+   */
+  protected $manager;
+
+  /**
+   * The Drupal configuration factory.
+   *
+   * @var \Drupal\Core\Config\ConfigFactoryInterface
+   */
+  protected $config;
+
+  /**
+   * A logger instance.
+   *
+   * @var \Psr\Log\LoggerInterface
+   */
+  protected $logger;
+
+  /**
+   * Constructs a RouteSubscriber object.
+   *
+   * @param \Drupal\rest\Plugin\Type\ResourcePluginManager $manager
+   *   The resource plugin manager.
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config
+   *   The configuration factory holding resource settings.
+   * @param \Psr\Log\LoggerInterface $logger
+   *   A logger instance.
+   */
+  public function __construct(ResourcePluginManager $manager, ConfigFactoryInterface $config, LoggerInterface $logger) {
+    $this->manager = $manager;
+    $this->config = $config;
+    $this->logger = $logger;
+  }
+
+  /**
+   * Alters existing routes for a specific collection.
+   *
+   * @param \Symfony\Component\Routing\RouteCollection $collection
+   *   The route collection for adding routes.
+   * @return array
+   */
+  protected function alterRoutes(RouteCollection $collection) {
+    $routes = array();
+    $enabled_resources = $this->config->get('rest.settings')->get('resources') ?: array();
+
+    // Iterate over all enabled resource plugins.
+    foreach ($enabled_resources as $id => $enabled_methods) {
+      $plugin = $this->manager->getInstance(array('id' => $id));
+
+      foreach ($plugin->routes() as $name => $route) {
+        // @todo: Are multiple methods possible here?
+        $methods = $route->getMethods();
+        // Only expose routes where the method is enabled in the configuration.
+        if ($methods && ($method = $methods[0]) && $method && isset($enabled_methods[$method])) {
+          $route->setRequirement('_access_rest_csrf',  'TRUE');
+
+          // Check that authentication providers are defined.
+          if (empty($enabled_methods[$method]['supported_auth']) || !is_array($enabled_methods[$method]['supported_auth'])) {
+            $this->logger->error('At least one authentication provider must be defined for resource @id', array(':id' => $id));
+            continue;
+          }
+
+          // Check that formats are defined.
+          if (empty($enabled_methods[$method]['supported_formats']) || !is_array($enabled_methods[$method]['supported_formats'])) {
+            $this->logger->error('At least one format must be defined for resource @id', array(':id' => $id));
+            continue;
+          }
+
+          // If the route has a format requirement, then verify that the
+          // resource has it.
+          $format_requirement = $route->getRequirement('_format');
+          if ($format_requirement && !in_array($format_requirement, $enabled_methods[$method]['supported_formats'])) {
+            continue;
+          }
+
+          // The configuration seems legit at this point, so we set the
+          // authentication provider and add the route.
+          $route->setOption('_auth', $enabled_methods[$method]['supported_auth']);
+          $routes["rest.$name"] = $route;
+          $collection->add("rest.$name", $route);
+        }
+      }
+    }
+  }
+
+}