Issue #2238217 by effulgentsia, neclimdul, martin107, tim.plunkett, cweagans,...

Issue #2238217 by effulgentsia, neclimdul, martin107, tim.plunkett, cweagans, kim.pepper, xjm: Introduce a RouteMatch class.

core/core.services.yml

@@ -19,7 +19,7 @@ services:
       - { name: cache.context}
   cache_context.theme:
     class: Drupal\Core\Cache\ThemeCacheContext
-    arguments: ['@request_stack', '@theme.negotiator']
+    arguments: ['@current_route_match', '@theme.negotiator']
     tags:
       - { name: cache.context}
   cache_context.timezone:
@@ -201,7 +201,7 @@ services:
       - { name: service_collector, tag: http_client_subscriber, call: attach }
   theme.negotiator:
     class: Drupal\Core\Theme\ThemeNegotiator
-    arguments: ['@access_check.theme', '@request_stack']
+    arguments: ['@access_check.theme']
     tags:
       - { name: service_collector, tag: theme_negotiator, call: addNegotiator }
   theme.negotiator.default:
@@ -211,7 +211,7 @@ services:
       - { name: theme_negotiator, priority: -100 }
   theme.negotiator.ajax_base_page:
     class: Drupal\Core\Theme\AjaxBasePageNegotiator
-    arguments: ['@csrf_token', '@config.factory']
+    arguments: ['@csrf_token', '@config.factory', '@request_stack']
     tags:
       - { name: theme_negotiator, priority: 1000 }
   container.namespaces:
@@ -273,6 +273,9 @@ services:
     class: Symfony\Component\HttpFoundation\RequestStack
     tags:
       - { name: persist }
+  current_route_match:
+     class: Drupal\Core\Routing\CurrentRouteMatch
+     arguments: ['@request_stack']
   event_dispatcher:
     class: Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher
     arguments: ['@service_container']

core/includes/menu.inc

@@ -8,7 +8,6 @@
 use Drupal\Component\Utility\String;
 use Drupal\Core\Render\Element;
 use Drupal\Core\Template\Attribute;
-use Symfony\Cmf\Component\Routing\RouteObjectInterface;
 
 /**
  * @defgroup menu Menu and routing system
@@ -479,7 +478,7 @@ function menu_local_tasks($level = 0) {
     $data['tabs'] = array();
     $data['actions'] = array();
 
-    $route_name = \Drupal::request()->attributes->get(RouteObjectInterface::ROUTE_NAME);
+    $route_name = \Drupal::routeMatch()->getRouteName();
     if (!empty($route_name)) {
       $manager = \Drupal::service('plugin.manager.menu.local_task');
       $local_tasks = $manager->getTasksBuild($route_name);
@@ -534,7 +533,7 @@ function menu_secondary_local_tasks() {
  */
 function menu_get_local_actions() {
   $links = menu_local_tasks();
-  $route_name = Drupal::request()->attributes->get(RouteObjectInterface::ROUTE_NAME);
+  $route_name = Drupal::routeMatch()->getRouteName();
   $manager = \Drupal::service('plugin.manager.menu.local_action');
   return $manager->getActionsForRoute($route_name) + $links['actions'];
 }

core/includes/theme.inc

@@ -104,8 +104,7 @@ function drupal_theme_initialize() {
   // @todo Let the theme.negotiator listen to the kernel request event.
   // Determine the active theme for the theme negotiator service. This includes
   // the default theme as well as really specific ones like the ajax base theme.
-  $request = \Drupal::request();
-  $theme = \Drupal::service('theme.negotiator')->determineActiveTheme($request);
+  $theme = \Drupal::service('theme.negotiator')->determineActiveTheme(\Drupal::routeMatch());
 
   // If no theme could be negotiated, or if the negotiated theme is not within
   // the list of enabled themes, fall back to the default theme output of core
@@ -2133,7 +2132,7 @@ function template_preprocess_page(&$variables) {
     );
   }
 
-  if ($node = \Drupal::request()->attributes->get('node')) {
+  if ($node = \Drupal::routeMatch()->getParameter('node')) {
     $variables['node'] = $node;
   }
 

core/lib/Drupal.php

@@ -187,6 +187,16 @@ public static function request() {
     return static::$container->get('request');
   }
 
+  /**
+   * Retrieves the currently active route match object.
+   *
+   * @return \Drupal\Core\Routing\RouteMatchInterface
+   *   The currently active route match object.
+   */
+  public static function routeMatch() {
+    return static::$container->get('current_route_match');
+  }
+
   /**
    * Gets the current active user.
    *

core/lib/Drupal/Core/Cache/ThemeCacheContext.php

@@ -7,7 +7,7 @@
 
 namespace Drupal\Core\Cache;
 
-use Symfony\Component\HttpFoundation\RequestStack;
+use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\Core\Theme\ThemeNegotiatorInterface;
 
 /**
@@ -16,11 +16,11 @@
 class ThemeCacheContext implements CacheContextInterface {
 
   /**
-   * The request stack.
+   * The current route match.
    *
-   * @var \Symfony\Component\HttpFoundation\RequestStack
+   * @var \Drupal\Core\Routing\RouteMatch
    */
-  protected $requestStack;
+  protected $routeMatch;
 
   /**
    * The theme negotiator.
@@ -32,13 +32,13 @@ class ThemeCacheContext implements CacheContextInterface {
   /**
    * Constructs a new ThemeCacheContext service.
    *
-   * @param \Symfony\Component\HttpFoundation\RequestStack $request_stack
-   *   The request stack.
+   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
+   *   The route match.
    * @param \Drupal\Core\Theme\ThemeNegotiatorInterface $theme_negotiator
    *   The theme negotiator.
    */
-  public function __construct(RequestStack $request_stack, ThemeNegotiatorInterface $theme_negotiator) {
-    $this->requestStack = $request_stack;
+  public function __construct(RouteMatchInterface $route_match, ThemeNegotiatorInterface $theme_negotiator) {
+    $this->routeMatch = $route_match;
     $this->themeNegotiator = $theme_negotiator;
   }
 
@@ -53,8 +53,7 @@ public static function getLabel() {
    * {@inheritdoc}
    */
   public function getContext() {
-    $request = $this->requestStack->getCurrentRequest();
-    return $this->themeNegotiator->determineActiveTheme($request) ?: 'stark';
+    return $this->themeNegotiator->determineActiveTheme($this->routeMatch) ?: 'stark';
   }
 
 }

core/lib/Drupal/Core/Routing/CurrentRouteMatch.php

+<?php
+
+/**
+ * @file
+ * Contains Drupal\Core\Routing\CurrentRouteMatch.
+ */
+
+namespace Drupal\Core\Routing;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\RequestStack;
+
+/**
+ * Default object for current_route_match service.
+ */
+class CurrentRouteMatch implements RouteMatchInterface {
+
+  /**
+   * The related request stack.
+   *
+   * @var \Symfony\Component\HttpFoundation\RequestStack
+   */
+  protected $requestStack;
+
+  /**
+   * Internal cache of RouteMatch objects.
+   *
+   * @var \SplObjectStorage
+   */
+  protected $routeMatches;
+
+  /**
+   * Constructs a CurrentRouteMatch object.
+   *
+   * @param \Symfony\Component\HttpFoundation\RequestStack $request_stack
+   *  The request stack.
+   */
+  public function __construct(RequestStack $request_stack) {
+    $this->requestStack = $request_stack;
+    $this->routeMatches = new \SplObjectStorage();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRouteName() {
+    return $this->getCurrentRouteMatch()->getRouteName();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRouteObject() {
+    return $this->getCurrentRouteMatch()->getRouteObject();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getParameter($parameter_name) {
+    return $this->getCurrentRouteMatch()->getParameter($parameter_name);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getParameters() {
+    return $this->getCurrentRouteMatch()->getParameters();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRawParameter($parameter_name) {
+    return $this->getCurrentRouteMatch()->getRawParameter($parameter_name);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRawParameters() {
+    return $this->getCurrentRouteMatch()->getRawParameters();
+  }
+
+  /**
+   * Returns the route match for the current request.
+   *
+   * @return \Drupal\Core\Routing\RouteMatchInterface
+   *   The current route match object.
+   */
+  protected function getCurrentRouteMatch() {
+    return $this->getRouteMatch($this->requestStack->getCurrentRequest());
+  }
+
+  /**
+   * Returns the route match for a passed in request.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   A request object.
+   *
+   * @return \Drupal\Core\Routing\RouteMatchInterface
+   *   A route match object created from the request.
+   */
+  protected function getRouteMatch(Request $request) {
+    if (isset($this->routeMatches[$request])) {
+      $route_match = $this->routeMatches[$request];
+    }
+    else {
+      $route_match = RouteMatch::createFromRequest($request);
+
+      // Since getRouteMatch() might be invoked both before and after routing
+      // is completed, only statically cache the route match after there's a
+      // matched route.
+      if ($route_match->getRouteObject()) {
+        $this->routeMatches[$request] = $route_match;
+      }
+    }
+    return $route_match;
+  }
+
+}

core/lib/Drupal/Core/Routing/NullRouteMatch.php

+<?php
+
+/**
+ * @file
+ * Contains Drupal\Core\Routing\NullRouteMatch.
+ */
+
+namespace Drupal\Core\Routing;
+
+use Symfony\Component\HttpFoundation\ParameterBag;
+
+/**
+ * Stub implementation of RouteMatchInterface for when there's no matched route.
+ */
+class NullRouteMatch implements RouteMatchInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRouteName() {
+    return NULL;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRouteObject() {
+    return NULL;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getParameter($parameter_name) {
+    return NULL;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getParameters() {
+    return new ParameterBag();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRawParameter($parameter_name) {
+    return NULL;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRawParameters() {
+    return new ParameterBag();
+  }
+
+}

core/lib/Drupal/Core/Routing/RouteMatch.php

+<?php
+
+/**
+ * @file
+ * Contains Drupal\Core\Routing\RouteMatch.
+ */
+
+namespace Drupal\Core\Routing;
+
+use Symfony\Cmf\Component\Routing\RouteObjectInterface;
+use Symfony\Component\HttpFoundation\ParameterBag;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Routing\Route;
+
+/**
+ * Default object representing the results of routing.
+ */
+class RouteMatch implements RouteMatchInterface {
+
+  /**
+   * The route name.
+   *
+   * @var string
+   */
+  protected $routeName;
+
+  /**
+   * The route.
+   *
+   * @var \Symfony\Component\Routing\Route
+   */
+  protected $route;
+
+  /**
+   * A key|value store of parameters.
+   *
+   * @var \Symfony\Component\HttpFoundation\ParameterBag
+   */
+  protected $parameters;
+
+  /**
+   * A key|value store of raw parameters.
+   *
+   * @var \Symfony\Component\HttpFoundation\ParameterBag
+   */
+  protected $rawParameters;
+
+  /**
+   * Constructs a RouteMatch object.
+   *
+   * @param string $route_name
+   *  The name of the route.
+   * @param \Symfony\Component\Routing\Route $route
+   *   The route.
+   * @param array $parameters
+   *   The parameters array.
+   * @param array $raw_parameters
+   *   The raw $parameters array.
+   */
+  public function __construct($route_name, Route $route, array $parameters = array(), array $raw_parameters = array()) {
+    $this->routeName = $route_name;
+    $this->route = $route;
+
+    // Pre-filter parameters.
+    $route_params = $this->getParameterNames();
+    $parameters = array_intersect_key($parameters, $route_params);
+    $raw_parameters = array_intersect_key($raw_parameters, $route_params);
+    $this->parameters = new ParameterBag($parameters);
+    $this->rawParameters = new ParameterBag($raw_parameters);
+  }
+
+  /**
+   * Creates a RouteMatch from a request.
+   *
+   * @param Request $request
+   *   A request object.
+   *
+   * @return \Drupal\Core\Routing\RouteMatchInterface
+   *   A new RouteMatch object if there's a matched route for the request.
+   *   A new NullRouteMatch object otherwise (e.g., on a 404 page or when
+   *   invoked prior to routing).
+   */
+  public static function createFromRequest(Request $request) {
+    if ($request->attributes->get(RouteObjectInterface::ROUTE_OBJECT)) {
+      $raw_variables = array();
+      if ($raw = $request->attributes->get('_raw_variables')) {
+        $raw_variables = $raw->all();
+      }
+      return new static(
+        $request->attributes->get(RouteObjectInterface::ROUTE_NAME),
+        $request->attributes->get(RouteObjectInterface::ROUTE_OBJECT),
+        $request->attributes->all(),
+        $raw_variables);
+    }
+    else {
+      return new NullRouteMatch();
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRouteName() {
+    return $this->routeName;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRouteObject() {
+    return $this->route;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getParameter($parameter_name) {
+    return $this->parameters->get($parameter_name);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getParameters() {
+    return $this->parameters;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRawParameter($parameter_name) {
+    return $this->rawParameters->get($parameter_name);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRawParameters() {
+    return $this->rawParameters;
+  }
+
+  /**
+   * Returns the names of all parameters for the currently matched route.
+   *
+   * @return array
+   *   Route parameter names as both the keys and values.
+   */
+  protected function getParameterNames() {
+    $names = array();
+    if ($route = $this->getRouteObject()) {
+      // Variables defined in path and host patterns are route parameters.
+      $variables = $route->compile()->getVariables();
+      $names = array_combine($variables, $variables);
+      // Route defaults that do not start with a leading "_" are also
+      // parameters, even if they are not included in path or host patterns.
+      foreach ($route->getDefaults() as $name => $value) {
+        if (!isset($names[$name]) && substr($name, 0, 1) !== '_') {
+          $names[$name] = $name;
+        }
+      }
+    }
+    return $names;
+  }
+
+}

core/lib/Drupal/Core/Routing/RouteMatchInterface.php

+<?php
+
+/**
+ * @file
+ * Contains Drupal\Core\Routing\RouteMatchInterface.
+ */
+
+namespace Drupal\Core\Routing;
+
+/**
+ * Provides an interface for classes representing the result of routing.
+ *
+ * Routing is the process of selecting the best matching candidate from a
+ * collection of routes for an incoming request. The relevant properties of a
+ * request include the path as well as a list of raw parameter values derived
+ * from the URL. If an appropriate route is found, raw parameter values will be
+ * upcast automatically if possible.
+ *
+ * The route match object contains useful information about the selected route
+ * as well as the raw and upcast parameters derived from the incoming
+ * request.
+ */
+interface RouteMatchInterface {
+
+  /**
+   * Returns the route name.
+   *
+   * @return string|null
+   *   The route name. NULL if no route is matched.
+   */
+  public function getRouteName();
+
+  /**
+   * Returns the route object.
+   *
+   * @return \Symfony\Component\Routing\Route|null
+   *   The route object. NULL if no route is matched.
+   */
+  public function getRouteObject();
+
+  /**
+   * Returns the value of a named route parameter.
+   *
+   * @param string $parameter_name
+   *   The parameter name.
+   *
+   * @return mixed|null
+   *   The parameter value. NULL if the route doesn't define the parameter or
+   *   if the parameter value can't be determined from the request.
+   */
+  public function getParameter($parameter_name);
+
+  /**
+   * Returns the bag of all route parameters.
+   *
+   * @return \Symfony\Component\HttpFoundation\ParameterBag
+   *   The parameter bag.
+   */
+  public function getParameters();
+
+  /**
+   * Returns the raw value of a named route parameter.
+   *
+   * @param string $parameter_name
+   *   The parameter name.
+   *
+   * @return string|null
+   *   The raw (non-upcast) parameter value. NULL if the route doesn't define
+   *   the parameter or if the raw parameter value can't be determined from the
+   *   request.
+   */
+  public function getRawParameter($parameter_name);
+
+  /**
+   * Returns the bag of all raw route parameters.
+   *
+   * @return \Symfony\Component\HttpFoundation\ParameterBag
+   *   The parameter bag.
+   */
+  public function getRawParameters();
+
+}

core/lib/Drupal/Core/Theme/AjaxBasePageNegotiator.php

@@ -9,8 +9,8 @@
 
 use Drupal\Core\Access\CsrfTokenGenerator;
 use Drupal\Core\Config\ConfigFactoryInterface;
-use Symfony\Cmf\Component\Routing\RouteObjectInterface;
-use Symfony\Component\HttpFoundation\Request;
+use Drupal\Core\Routing\RouteMatchInterface;
+use Symfony\Component\HttpFoundation\RequestStack;
 
 /**
  * Defines a theme negotiator that deals with the active theme on ajax requests.
@@ -45,6 +45,13 @@ class AjaxBasePageNegotiator implements ThemeNegotiatorInterface {
    */
   protected $configFactory;
 
+  /**
+   * The request stack.
+   *
+   * @var \Symfony\Component\HttpFoundation\RequestStack
+   */
+  protected $requestStack;
+
   /**
    * Constructs a new AjaxBasePageNegotiator.
    *
@@ -52,18 +59,21 @@ class AjaxBasePageNegotiator implements ThemeNegotiatorInterface {
    *   The CSRF token generator.
    * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
    *   The config factory.
+   * @param \Symfony\Component\HttpFoundation\RequestStack $request_stack
+   *   The request stack used to retrieve the current request.
    */
-  public function __construct(CsrfTokenGenerator $token_generator, ConfigFactoryInterface $config_factory) {
+  public function __construct(CsrfTokenGenerator $token_generator, ConfigFactoryInterface $config_factory, RequestStack $request_stack) {
     $this->csrfGenerator = $token_generator;
     $this->configFactory = $config_factory;
+    $this->requestStack = $request_stack;