Added support for route filters to the application and dispatcher classes

README.md

@@ -159,6 +159,28 @@ put('/process_my_form', function(){
 });
 ```
 
+### Route Filters
+
+In some cases, routes patterns require a global modification, such as prepending a base path when the application is running in a subdirectory of the document root and web server-level URL rewrites are not an available or desirable option.  Route filters are callbacks that are executed on each route pattern before it's evaluated against the current request.
+
+**bootstrap.php:**
+
+``` php
+config('base_dir', '/subdir');
+route(function($pattern) {
+    return config('base_dir') . $pattern;
+});
+```
+
+**Controller.php:**
+
+``` php
+// This route will actually resolve to /subdir/foo
+$app->get('/foo', function() {
+    // ...
+});
+```
+
 Pass
 ----
 

lib/Breeze.php

@@ -115,6 +115,32 @@ function before()
     );
 }
 
+/**
+ * Defines a new route filter.
+ *
+ * Closure `$filter` will be invoked on each route pattern before it's
+ * evaluated against the current request.
+ *
+ * NOTE: If you call `route()` multiple times, each callback will be invoked
+ * in the order it was defined.
+ *
+ * @code
+ *     route(function($pattern){
+ *         return '/subdir' . $pattern;
+ *     });
+ * @endcode
+ *
+ * @param Closure $filter The filter to add.
+ *
+ * @return void
+ */
+function route()
+{
+    return call_user_func_array(
+        array(Application::getInstance('breeze'), 'route'), func_get_args()
+    );
+}
+
 /**
  * Defines or dispatches a condition.
  *

lib/Breeze/Application.php

@@ -1497,16 +1497,21 @@ public function dispatch($requestMethod = null, $requestUri = null)
         $this->setRequestMethod($requestMethod);
 
         if (isset($this->_routes[$this->_requestMethod])) {
+            $filters = $this->_application->getRouteFilters();
             foreach ($this->_routes[$this->_requestMethod] as $route) {
+                $pattern = $route['pattern'];
+                foreach ($filters as $filter) {
+                    $pattern = $filter($pattern);
+                }
                 try {
-                    if ($route['pattern']{0} != '/') {
+                    if ($pattern{0} != '/') {
                         $this->_processRegexpRoute(
-                            $route['pattern'],
+                            $pattern,
                             $route['handler']
                         );
                     } else {
                         $this->_processRoute(
-                            $route['pattern'], $route['handler']
+                            $pattern, $route['handler']
                         );
                     }
                 } catch (PassException $exception) {
@@ -1991,6 +1996,12 @@ class Application
      * @var Breeze\ClosuresCollection
      */
     protected $_filters = array();
+    /**
+     * User-defined route filters.
+     *
+     * @var Breeze\ClosuresCollection
+     */
+    protected $_routeFilters;
 
     /**
      * Initializes defined plugins and allows for overriding of default
@@ -2034,6 +2045,9 @@ public function __construct(Configurations $configurations = null)
                 'after_filters_object', 'Breeze\\ClosuresCollection'
             )
         );
+        $this->_routeFilters = $this->_getDependency(
+            'route_filters_object', 'Breeze\\ClosuresCollection'
+        );
 
         foreach (self::$_plugins as $plugin) {
             $plugin($this);
@@ -2094,6 +2108,7 @@ public function __clone()
         $this->_conditions = clone $this->_conditions;
         $this->_status = clone $this->_status;
         $this->_userHelpers = clone $this->_userHelpers;
+        $this->_routeFilters = clone $this->_routeFilters;
 
         $this->_filters[self::BEFORE] = clone $this->_filters[self::BEFORE];
         $this->_filters[self::AFTER] = clone $this->_filters[self::AFTER];
@@ -2504,6 +2519,16 @@ public function getUserHelpers()
         return array_keys($this->_userHelpers->all());
     }
 
+    /**
+     * Gets a list of all user-defined route filters.
+     *
+     * @return array All user-defined route filters.
+     */
+    public function getRouteFilters()
+    {
+        return $this->_routeFilters->all();
+    }
+
     /**
      * Adds a filter to be executed before the request is routed.
      *
@@ -2516,6 +2541,19 @@ public function before($filter)
         $this->_filters[self::BEFORE]->add($filter);
     }
 
+    /**
+     * Adds a filter to be executed on each route before evaluating it
+     * against the current request.
+     *
+     * @param Closure $filter The filter to add.
+     *
+     * @return void
+     */
+    public function route($filter)
+    {
+        $this->_routeFilters->add($filter);
+    }
+
     /**
      * Adds a filter to be executed after the request is routed.
      *
@@ -2578,4 +2616,4 @@ public function run($requestMethod = null, $requestUri = null)
             // to the end of a Breeze request
         }
     }
-}
+}

test/Breeze/ApplicationTest.php

@@ -783,6 +783,18 @@ public function testAddAfterFilter()
         $this->_application->after($closure);
     }
 
+    /**
+     * Tests {@link Breeze\Application::route()} to add a route filter.
+     */
+    public function testAddRouteFilter()
+    {
+        $closure = function(){};
+        $this->_mocks['route_filters_object']->expects($this->once())
+                                             ->method('add')
+                                             ->with($this->equalTo($closure));
+        $this->_application->route($closure);
+    }
+
     /**
      * Tests {@link Breeze\Application::filter()} with a bad filter type throws
      * an InvalidArgumentException.
@@ -1006,8 +1018,12 @@ public function testCloneIsDeep()
                                              ->method('add');
         $clone->after(function(){});
 
+        $this->_mocks['route_filters_object']->expects($this->never())
+                                             ->method('add');
+        $clone->route(function(){});
+
         $this->_configurations->expects($this->never())
                               ->method('set');
         $clone->config('jeff', 'is cool');
     }
-}
+}

test/Breeze/ApplicationTestCase.php

@@ -90,6 +90,9 @@ protected function _setupMockedDependencies()
         $this->_mocks['after_filters_object'] = $this->getMock(
             'Breeze\\ClosuresCollection', array(), array(), '', FALSE
         );
+        $this->_mocks['route_filters_object'] = $this->getMock(
+            'Breeze\\ClosuresCollection', array(), array(), '', FALSE
+        );
 
         $this->_configurations = $this->getMock(
             'Breeze\\Configurations', array(), array(), '', FALSE

test/Breeze/Dispatcher/DispatcherTest.php

@@ -129,11 +129,25 @@ class DispatcherTest extends \PHPUnit_Framework_TestCase
      * @return void
      */
     public function setUp()
+    {
+        $this->_mockApplication();
+        $this->_dispatcher = new Dispatcher($this->_application);
+    }
+
+    /**
+     * Configures a mock application instance.
+     *
+     * @param array $routeFilterCallbacks Optional list of router filter
+     *        callbacks to add
+     */
+    protected function _mockApplication(array $routeFilterCallbacks = array())
     {
         $this->_application = $this->getMock(
-            'Breeze\\Application', array(), array(), '', FALSE
+            'Breeze\\Application', array('getRouteFilters'), array(), '', FALSE
         );
-        $this->_dispatcher = new Dispatcher($this->_application);
+        $this->_application->expects($this->any())
+                        ->method('getRouteFilters')
+                        ->will($this->returnValue($routeFilterCallbacks));
     }
 
     /**
@@ -235,6 +249,24 @@ public function testSetRequestUriWithParameter()
         });
     }
 
+    /**
+     * Tests {@link Breeze\Dispatcher\Dispatcher::dispatch()} with route
+     * filters added.
+     */
+    public function testDispatchWithRouteFilters()
+    {
+        $bar = function($pattern) { return $pattern . '/bar'; };
+        $baz = function($pattern) { return $pattern . '/baz'; };
+        $this->_mockApplication(array($bar, $baz));
+        $this->_dispatcher = new Dispatcher($this->_application);
+        $success = false;
+        $this->_dispatcher->get('/foo', function() use (&$success) {
+            $success = true;
+        });
+        $this->_dispatcher->dispatch('GET', '/foo/bar/baz');
+        $this->assertTrue($success);
+    }
+
     /**
      * Tests {@link Breeze\Dispatcher\Dispatcher::setRequestUri()} to
      * set the requested URI from the $_SERVER['REQUEST_URI'] superglobal.
@@ -482,4 +514,4 @@ function() use ($uri) {
             }
         }
     }
-}
+}