add validator, error handler

context.php

@@ -1,6 +1,7 @@
 <?php
 
 require_once __DIR__ . '/session.php';
+require_once __DIR__ . '/validator.php';
 
 /**
  * Context holds the request, response, and shared state for a request
@@ -97,4 +98,33 @@ class Context
             $this->text($message, $status);
         }
     }
+
+    /**
+     * validate validates input data against rules
+     */
+    public function validate(array $data, array $rules, array $messages = []): Validator
+    {
+        $validator = new Validator();
+        $validator->validate($data, $rules, $messages);
+        
+        if ($validator->failed()) {
+            throw new ValidationException($validator->errors());
+        }
+        
+        return $validator;
+    }
+
+    /**
+     * validateRequest validates request data against rules
+     */
+    public function validateRequest(array $rules, array $messages = []): Validator
+    {
+        $data = array_merge(
+            $this->request->query,
+            $this->request->body,
+            $this->request->params
+        );
+        
+        return $this->validate($data, $rules, $messages);
+    }
 }

web.php

@@ -5,6 +5,7 @@ require_once __DIR__ . '/request.php';
 require_once __DIR__ . '/response.php';
 require_once __DIR__ . '/context.php';
 require_once __DIR__ . '/router.php';
+require_once __DIR__ . '/errorhandler.php';
 
 /**
  * Web is the application controller itself
@@ -14,10 +15,12 @@ class Web
     private Router $router;
     private array $middleware = [];
     private Context $context;
+    private ErrorHandler $errorHandler;
 
-    public function __construct()
+    public function __construct(bool $debug = false)
     {
         $this->router = new Router();
+        $this->errorHandler = new ErrorHandler($debug);
     }
 
     public function use(callable $middleware): self
@@ -84,6 +87,18 @@ class Web
         return $this;
     }
 
+    public function setErrorHandler(int $status, callable $handler): self
+    {
+        $this->errorHandler->register($status, $handler);
+        return $this;
+    }
+
+    public function setDefaultErrorHandler(callable $handler): self
+    {
+        $this->errorHandler->setDefaultHandler($handler);
+        return $this;
+    }
+
     private function addGroupRoutes(Router $router, string $prefix, string $path, mixed $node, string $currentPath = ''): void
     {
         if ($path !== '') $currentPath = $currentPath ? "$currentPath/$path" : $path;
@@ -113,12 +128,12 @@ class Web
                 );
 
                 if ($result['code'] === 404) {
-                    $this->context->error(404);
+                    $this->errorHandler->handle($this->context, 404);
                     return;
                 }
 
                 if ($result['code'] === 405) {
-                    $this->context->error(405);
+                    $this->errorHandler->handle($this->context, 405);
                     return;
                 }
 
@@ -151,8 +166,7 @@ class Web
 
             $chain();
         } catch (Exception $e) {
-            error_log($e->getMessage());
-            $this->context->error(500, 'Internal Server Error');
+            $this->errorHandler->handleException($this->context, $e);
         }
     }
 }