From a2c47304d8230f1937c2a4f019aba89fa74203bc Mon Sep 17 00:00:00 2001
From: Igor Scheller <igor.scheller@igorshp.de>
Date: Wed, 29 Aug 2018 13:58:50 +0200
Subject: Added generic error pages

---
 src/Middleware/ErrorHandler.php     | 80 +++++++++++++++++++++++++++++++++++++
 src/Middleware/LegacyMiddleware.php | 10 ++---
 2 files changed, 84 insertions(+), 6 deletions(-)
 create mode 100644 src/Middleware/ErrorHandler.php

(limited to 'src/Middleware')

diff --git a/src/Middleware/ErrorHandler.php b/src/Middleware/ErrorHandler.php
new file mode 100644
index 00000000..a7c4cfe6
--- /dev/null
+++ b/src/Middleware/ErrorHandler.php
@@ -0,0 +1,80 @@
+<?php
+
+namespace Engelsystem\Middleware;
+
+use Engelsystem\Http\Response;
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use Twig_LoaderInterface as TwigLoader;
+
+class ErrorHandler implements MiddlewareInterface
+{
+    /** @var TwigLoader */
+    protected $loader;
+
+    /** @var string */
+    protected $viewPrefix = 'errors/';
+
+    /**
+     * @param TwigLoader $loader
+     */
+    public function __construct(TwigLoader $loader)
+    {
+        $this->loader = $loader;
+    }
+
+    /**
+     * Handles any error messages
+     *
+     * Should be added at the beginning
+     *
+     * @param ServerRequestInterface  $request
+     * @param RequestHandlerInterface $handler
+     * @return ResponseInterface
+     */
+    public function process(
+        ServerRequestInterface $request,
+        RequestHandlerInterface $handler
+    ): ResponseInterface {
+        $response = $handler->handle($request);
+
+        $statusCode = $response->getStatusCode();
+        if ($statusCode < 400 || !$response instanceof Response) {
+            return $response;
+        }
+
+        $view = $this->selectView($statusCode);
+
+        return $response->withView(
+            $this->viewPrefix . $view,
+            [
+                'status'  => $statusCode,
+                'content' => $response->getContent(),
+            ],
+            $statusCode,
+            $response->getHeaders()
+        );
+    }
+
+    /**
+     * Select a view based on the given status code
+     *
+     * @param int $statusCode
+     * @return string
+     */
+    protected function selectView(int $statusCode): string
+    {
+        $hundreds = intdiv($statusCode, 100);
+
+        $viewsList = [$statusCode, $hundreds, $hundreds * 100];
+        foreach ($viewsList as $view) {
+            if ($this->loader->exists($this->viewPrefix . $view)) {
+                return $view;
+            }
+        }
+
+        return 'default';
+    }
+}
diff --git a/src/Middleware/LegacyMiddleware.php b/src/Middleware/LegacyMiddleware.php
index bf849611..78132815 100644
--- a/src/Middleware/LegacyMiddleware.php
+++ b/src/Middleware/LegacyMiddleware.php
@@ -83,7 +83,7 @@ class LegacyMiddleware implements MiddlewareInterface
         }
 
         if (empty($title) and empty($content)) {
-            $page = '404';
+            $page = 404;
             $title = _('Page not found');
             $content = _('This page could not be found or you don\'t have permission to view it. You probably have to sign in or register in order to gain access!');
         }
@@ -277,10 +277,8 @@ class LegacyMiddleware implements MiddlewareInterface
             $parameters['meetings'] = 1;
         }
 
-        $status = 200;
-        if ($page == '404') {
-            $status = 404;
-            $content = info($content, true);
+        if (!empty($page) && is_int($page)) {
+            return response($content, (int)$page);
         }
 
         return response(view('layouts/app', [
@@ -290,6 +288,6 @@ class LegacyMiddleware implements MiddlewareInterface
             'content'        => msg() . $content,
             'header_toolbar' => header_toolbar(),
             'event_info'     => EventConfig_info($event_config) . ' <br />'
-        ]), $status);
+        ]), 200);
     }
 }
-- 
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