Add pattern outline generation to the route compilation.

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

@@ -17,6 +17,13 @@ class CompiledRoute extends SymfonyCompiledRoute {
    */
   protected $fit;
 
+  /**
+   * The pattern outline of this route.
+   *
+   * @var string
+   */
+  protected $patternOutline;
+
   /**
     * Constructor.
     *
@@ -24,22 +31,26 @@ class CompiledRoute extends SymfonyCompiledRoute {
     *   A original Route instance.
     * @param int $fit
     *   The fitness of the route.
-    * @param string $regex        The regular expression to use to match this route
-    * @param array  $tokens       An array of tokens to use to generate URL for this route
-    * @param array  $variables    An array of variables
+    * @param string $fit
+    *   The pattern outline for this route.
     */
-  public function __construct(Route $route, $fit) {
+  public function __construct(Route $route, $fit, $pattern_outline) {
     // We're ignoring the rest of this stuff; really this should be just using
     // an interface, but the Symfony component doesn't have one. This is a bug
     // in Symfony.
     parent::__construct($route, '', '', array(), array());
 
     $this->fit = $fit;
+    $this->patternOutline = $pattern_outline;
   }
 
   public function getFit() {
     return $this->fit;
   }
 
+  public function getPatternOutline() {
+    return $this->patternOutline;
+  }
+
 }
 

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

@@ -29,10 +29,27 @@ class RouteCompiler implements RouteCompilerInterface {
 
     $fit = $this->getFit($route->getPattern());
 
-    return new CompiledRoute($route, $fit);
+    $pattern_outline = $this->getPatternOutline($route->getPattern());
+
+    return new CompiledRoute($route, $fit, $pattern_outline);
 
   }
 
+  /**
+   * Returns the pattern outline.
+   *
+   * The pattern outline is the path pattern but normalized so that all
+   * placeholders are equal strings.
+   *
+   * @param string $path
+   *   The path pattern to normalize to an outline.
+   *
+   * @return string
+   *   The path pattern outline.
+   */
+  public function getPatternOutline($path) {
+    return preg_replace('#\{\w+\}#', '%', $path);
+  }
 
   /**
    * Determines the fitness of the provided path.

core/modules/system/tests/routing.test

@@ -194,13 +194,13 @@ class RouteTestCase extends WebTestBase {
   }
 
   public function testCompilation() {
-
-    $route = new Route('test/{something}/more');
+    $route = new Route('/test/{something}/more');
     $route->setOption('compiler_class', 'Drupal\Core\Routing\RouteCompiler');
     $compiled = $route->compile();
 
     $this->assertEqual($route, $compiled->getRoute(), t('Compiled route has the correct route object.'));
     $this->assertEqual($compiled->getFit(), 5 /* That's 101 binary*/, t('The fit was correct.'));
+    $this->assertEqual($compiled->getPatternOutline(), '/test/%/more', t('The pattern outline was correct.'));
 
   }