API Middleware

Middleware/api.php

@@ -0,0 +1,56 @@
+<?php
+/**
+ * API Middleware Class for the Slim Framework
+ *
+ * @author  Montana Flynn <montana@montanaflynn.me>
+ * @since  3/10/13
+ *
+ * Simple class to make building API's easier
+ *
+ * Usage
+ * ====
+ * 
+ * $api = new \Slim\slim();
+ * $api->add(new \Slim\Extras\Middleware\API());
+ * 
+ */
+
+namespace Slim\Extras\Middleware;
+
+class API extends \Slim\Middleware
+{
+  public function call()
+  {
+
+    // Just to make things easy, we can avoid the 404 page and override with 
+    // helpful error messages.  May extend later to find all registered endpoints
+    $app = $this->app;
+
+    // Change to json
+    $response = $app->response();
+    $response['Content-Type'] = 'application/json';
+
+    // No Endpoint Specified?
+    $app->get('/', function()  use ($app) {
+    	$app->halt(400, json_encode(array('error'=>'You must specify an endpoint!')));
+    });
+
+    // Cannot Find Endpoint?
+    $app->get('/:method', function($method) use ($app) {
+    	$app->halt(400, json_encode(array('error'=>'There is no endpoint named '.$method.'!')));
+    })->conditions(array('method' => '.+'));
+
+    // Move along to next call
+    $this->next->call();
+
+    // But wait! Let's add support for jsonp callbacks
+    $request = $app->request();
+    $callback = $request->params('callback');
+
+    if(!empty($callback)){
+      $app->contentType('application/javascript');
+      $jsonp_response = $callback . "(" .$app->response()->body() . ")";
+      $app->response()->body($jsonp_response);
+    }
+  }
+}