first commit

app/Core/Auth.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Core;
+
+class Auth
+{
+    public static function check(): bool
+    {
+        return !empty($_SESSION['user']);
+    }
+
+    public static function user(): ?array
+    {
+        return $_SESSION['user'] ?? null;
+    }
+
+    public static function login(array $user): void
+    {
+        $_SESSION['user'] = $user;
+    }
+
+    public static function logout(): void
+    {
+        unset($_SESSION['user']);
+        session_destroy();
+    }
+}