Prep autoloader

exam/classes/Auth/Auth.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Khofmann\Auth;
+
+use Pecee\Http\Middleware\IMiddleware;
+use Pecee\Http\Request;
+
+class Auth implements IMiddleware
+{
+  public function handle(Request $request): void
+  {
+    $token = $request->getHeader("token");
+
+    //TODO: Auth user with token
+
+    // If authentication failed
+    if ($request->token === null) {
+      response()->httpCode(401)->json(["message" => "Not Authorized"]);
+    }
+  }
+}

exam/classes/Database/Database.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace Khofmann\Database;
+
+use \PDO;
+
+class Database extends
+{
+  private static array $instances = [];
+
+  protected function __construct($dsn, $username = null, $password = null, array $options = null)
+  {
+    parent::__construct($dsn, $username, $password, $options);
+  }
+
+  public static function getInstance(): Database
+  {
+    $cls = static::class;
+    if (!isset(self::$instances[$cls])) {
+      $dataAccess = Config\Config::getDatabase();
+      self::$instances[$cls] = new static(
+        "mysql:host={$dataAccess["host"]};dbname={$dataAccess["database"]};charset={$dataAccess["charset"]}",
+        $dataAccess["user"],
+        $dataAccess["passwd"],
+        [
+          PDO::ATTR_PERSISTENT => false,
+          PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+          PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+          PDO::ATTR_EMULATE_PREPARES   => false,
+        ]
+      );
+    }
+
+    return self::$instances[$cls];
+  }
+}