refactoring router route delegation.

laravel/arr.php

@@ -77,4 +77,24 @@ class Arr {
 		$array[array_shift($keys)] = $value;
 	}
 
+	/**
+	 * Return the first element in an array which passes a given truth test.
+	 *
+	 * <code>
+	 *		// Get the first element in an array that is less than 2
+	 *		$value = Arr::first(array(4, 3, 2, 1), function($key, $value) {return $value < 2;});
+	 * </code>
+	 *
+	 * @param  array    $array
+	 * @param  Closure  $callback
+	 * @return mixed
+	 */
+	public static function first($array, $callback)
+	{
+		foreach ($array as $key => $value)
+		{
+			if (call_user_func($callback, $key, $value)) return $value;
+		}
+	}
+
 }
\ No newline at end of file

laravel/routing/caller.php

@@ -50,11 +50,6 @@ class Caller {
 	 */
 	public function call(Route $route)
 	{
-		if ( ! $route->callback instanceof \Closure and ! is_array($route->callback))
-		{
-			throw new \Exception('Invalid route defined for URI ['.$route->key.']');
-		}
-
 		// Since "before" filters can halt the request cycle, we will return any response
 		// from the before filters. Allowing the filters to halt the request cycle makes
 		// common tasks like authorization convenient to implement.
@@ -65,10 +60,10 @@ class Caller {
 
 		if ( ! is_null($response = $route->call()))
 		{
-			// If a route returns an array, it means that the route is delegating the
+			// If a route returns a string, it also means the route is delegating the
 			// handling of the request to a controller method. So, we will pass the
-			// array to the route delegator and let it resolve the controller.
-			if (is_array($response)) $response = $this->delegate($route, $response);
+			// string to the route delegator, exploding on "::".
+			if (is_string($response)) $response = $this->delegate($route, explode('::', $response));
 
 			return $this->finish($route, $response);
 		}
@@ -101,15 +96,10 @@ class Caller {
 	 * @param  array  $delegate
 	 * @return mixed
 	 */
-	public function delegate(Route $route, $delegate)
+	protected function delegate(Route $route, $delegate)
 	{
 		list($controller, $method) = array($delegate[0], $delegate[1]);
 
-		// A route delegate may contain an array of parameters that should be passed to
-		// the controller method. If it does, we will merge those parameters in with
-		// the other route parameters that were detected by the router.
-		$parameters = (isset($delegate[2])) ? array_merge((array) $delegate[2], $route->parameters) : $route->parameters;
-
 		$controller = $this->resolve($controller);
 
 		// If the controller doesn't exist or the request is to an invalid method, we will
@@ -127,7 +117,7 @@ class Caller {
 		// will not be used to handle the request to the application.
 		$response = $controller->before();
 
-		return (is_null($response)) ? call_user_func_array(array($controller, $method), $parameters) : $response;
+		return (is_null($response)) ? call_user_func_array(array($controller, $method), $route->parameters) : $response;
 	}
 
 	/**

laravel/routing/route.php

 <?php namespace Laravel\Routing;
 
 use Closure;
+use Laravel\Arr;
 
 class Route {
 
@@ -45,54 +46,55 @@ class Route {
 		$this->key = $key;
 		$this->callback = $callback;
 		$this->parameters = $parameters;
-		$this->uris = $this->parse_uris($key);
-	}
-
-	/**
-	 * Parse the route key and return an array of URIs the route responds to.
-	 *
-	 * @param  string  $key
-	 * @return array
-	 */
-	protected function parse_uris($key)
-	{
-		if (strpos($key, ', ') === false) return array($this->extract_uri($key));
 
-		// The extractor closure will retrieve the URI from a given route destination.
-		// If the request is to the root of the application, a single forward slash
-		// will be returned, otherwise the leading slash will be removed.
-		$extractor = function($segment)
+		// Extract each URI out of the route key. Since the route key has the request
+		// method, we will extract the method off of the string. If the URI points to
+		// the root of the application, a single forward slash will be returned.
+		// Otherwise, the leading slash will be removed.
+		foreach (explode(', ', $key) as $segment)
 		{
-			$segment = substr($segment, strpos($segment, ' ') + 1);
-
-			return ($segment !== '/') ? trim($segment, '/') : $segment;
-		};
-
-		return array_map(function($segment) use ($extractor) { return $extractor($segment); }, explode(', ', $key));
+			$this->uris[] = ($segment = (substr($segment, strpos($segment, ' ') + 1)) !== '/') ? trim($segment, '/') : $segment;
+		}
+
+		// The route callback must be either a Closure, an array, or a string. Closures
+		// obviously handle the requests to the route. An array can contain filters, as
+		// well as a Closure to handle requests to the route. A string, delegates control
+		// of the request to a controller method.
+		if ( ! $this->callback instanceof \Closure and ! is_array($this->callback) and ! is_string($this->callback))
+		{
+			throw new \Exception('Invalid route defined for URI ['.$this->key.']');
+		}
 	}
 
 	/**
 	 * Call the route closure.
 	 *
-	 * If no closure is defined for the route, null will be returned.
-	 *
 	 * @return mixed
 	 */
 	public function call()
 	{
-		return ( ! is_null($closure = $this->closure())) ? call_user_func_array($closure, $this->parameters) : null;
-	}
+		// If the value defined for a route is a Closure, we simply call the closure with the
+		// route's parameters and return the response.
+		if ($this->callback instanceof Closure)
+		{
+			return call_user_func_array($this->callback, $this->parameters);
+		}
 
-	/**
-	 * Extract the route closure from the route.
-	 *
-	 * @return Closure|null
-	 */
-	protected function closure()
-	{
-		if ($this->callback instanceof Closure) return $this->callback;
+		// Otherwise, we will assume the route is an array and will return the first value with
+		// a key of "do", or the first instance of a Closure. If the value is a string, the route
+		// is delegating the responsibility for handling the request to a controller.
+		elseif (is_array($this->callback))
+		{
+			return Arr::first($this->callback, function($key, $value) {return $key == 'do' or $value instanceof Closure;});
+		}
 
-		foreach ($this->callback as $value) { if ($value instanceof Closure) return $value; }
+		// If a value defined for a route is a string, it means the route is delegating control
+		// of the request to a controller. If that is the case, we will simply return the string
+		// for the route caller to parse and delegate.
+		elseif (is_string($this->callback))
+		{
+			return $this->callback;
+		}
 	}
 
 	/**