handle errors and exceptions in controllers

src/Response/HttpResponse.php

@@ -1,9 +1,12 @@
 <?php namespace SokoWeb\Response;
 
+use ErrorException;
+use Exception;
 use SokoWeb\Interfaces\Response\IRedirect;
 use SokoWeb\Interfaces\Response\IContent;
 use SokoWeb\Interfaces\Authentication\IAuthenticationRequired;
 use SokoWeb\Interfaces\Authorization\ISecured;
+use SokoWeb\Interfaces\Database\IConnection;
 use SokoWeb\Interfaces\Request\IRequest;
 use SokoWeb\Response\Redirect;
 use SokoWeb\Response\HtmlContent;
@@ -14,6 +17,8 @@ class HttpResponse
 {
     private IRequest $request;
 
+    private IConnection $dbConnection;
+
     private RouteCollection $routeCollection;
 
     private array $appConfig;
@@ -26,12 +31,16 @@ class HttpResponse
 
     public function __construct(
         IRequest $request,
+        IConnection $dbConnection,
         RouteCollection $routeCollection,
         array $appConfig,
         string $requestMethod,
         string $requestUrl
     ) {
+        set_error_handler([$this, 'exceptionsErrorHandler']);
+
         $this->request = $request;
+        $this->dbConnection = $dbConnection;
         $this->routeCollection = $routeCollection;
         $this->appConfig = $appConfig;
         $this->method = strtolower($requestMethod);
@@ -75,7 +84,16 @@ class HttpResponse
             return;
         }
 
+        $this->dbConnection->startTransaction();
+        try {
             $response = call_user_func([$controller, $handler[1]]);
+        } catch (Exception $exception) {
+            $this->dbConnection->rollback();
+            $this->render500($exception);
+            return;
+        }
+        $this->dbConnection->commit();
+
         if ($response instanceof IContent) {
             header('Content-Type: ' . $response->getContentType() . '; charset=UTF-8');
             $response->render();
@@ -106,4 +124,21 @@ class HttpResponse
         header('Content-Type: text/html; charset=UTF-8', true, 404);
         $content->render();
     }
+
+    private function render500(Exception $exception): void
+    {
+        if (empty($_ENV['DEV'])) {
+            $exceptionToPrint = null;
+        } else {
+            $exceptionToPrint = (string)$exception;
+        }
+
+        $content = new HtmlContent($this->appConfig['error500View'], ['exceptionToPrint' => $exceptionToPrint]);
+        header('Content-Type: text/html; charset=UTF-8', true, 500);
+        $content->render();
+    }
+
+    private function exceptionsErrorHandler($severity, $message, $filename, $lineno) {
+        throw new ErrorException($message, 0, $severity, $filename, $lineno);
+    }
 }