From e6d5e27c046bb525ffebff61aa0288f0f031a999 Mon Sep 17 00:00:00 2001
From: Gideon Kanz <gideon.kanz@turtle-coding-gbr.de>
Date: Tue, 13 Jan 2026 13:02:09 +0100
Subject: [PATCH] g6.3

---
 files/lib/basic.js    |  2 +-
 files/login.html      |  2 +-
 index.php             | 43 ++++++++++++++++++++++++++++---------------
 utils/couch.php       |  7 +++++++
 utils/real_server.php | 23 +++++++++++++++++++++++
 5 files changed, 60 insertions(+), 17 deletions(-)
 create mode 100644 utils/real_server.php

diff --git a/files/lib/basic.js b/files/lib/basic.js
index 4a027cf..216cce4 100644
--- a/files/lib/basic.js
+++ b/files/lib/basic.js
@@ -349,7 +349,7 @@ function form1(string) {
 
 
 async function getUserData(couchDB) {
-	let username = localStorage.getItem("user");
+	let username = sessionStorage.getItem("user");
 	const res = await couchDB.get("users");
 	if (!res) return null;
 	const data = res[username];
diff --git a/files/login.html b/files/login.html
index a45742c..1b30d74 100644
--- a/files/login.html
+++ b/files/login.html
@@ -145,7 +145,7 @@ async function login() {
 		return alert("Incorrect password!");
 	}
 	
-	localStorage.setItem("user", username);
+	sessionStorage.setItem("user", username);
 	
 	if (user.role === "student") {
 		location.href = "./student/uebersicht.html";
diff --git a/index.php b/index.php
index 86285e1..17351ab 100644
--- a/index.php
+++ b/index.php
@@ -1,20 +1,33 @@
 <?php
 require_once './utils/url_handler.php';
 require_once './utils/couch.php';
+require_once './utils/real_server.php';
 
-
-$path_info = new TurtlePathInfo();
-$path_info->filesDir = "./files/";
-$path_info->contentDir = "./files/";
-$path_info->homeFile = "./files/START.html";
-$path_info->notFoundFile = "./files/NOT-FOUND.html";
-
-
-$url_obj = TurtleURLObject::create_from_server(false, false);
-
-if (str_starts_with($url_obj->url, "couchdb")) {
+function main() {
+	if (!server_check()) {
+		echo 'Access denied';
+		return;
+	}
+	
+	$path_info = new TurtlePathInfo();
+	$path_info->filesDir = "./files/";
+	$path_info->contentDir = "./files/";
+	$path_info->homeFile = "./files/START.html";
+	$path_info->notFoundFile = "./files/NOT-FOUND.html";
+	
+	
+	$url_obj = TurtleURLObject::create_from_server(false, false);
 	$couchDB = new CouchDB("./data/couchdb.json", "./data/def_data.json", $url_obj);
-	$couchDB->execute();
-} else {
-	$url_obj->handle_request($path_info);
-}
\ No newline at end of file
+	
+	if (str_starts_with($url_obj->url, "couchdb")) {
+		$couchDB->execute();
+	} else if ($url_obj->url == "reset") {
+		$url_obj->url = "";
+		$couchDB->resetFile();
+		$url_obj->handle_request($path_info);
+	} else {
+		$url_obj->handle_request($path_info);
+	}
+}
+
+main();
\ No newline at end of file
diff --git a/utils/couch.php b/utils/couch.php
index 8d88db8..4f5088f 100644
--- a/utils/couch.php
+++ b/utils/couch.php
@@ -33,6 +33,13 @@ class CouchDB {
 		file_put_contents($this->db_file, str_replace("    ", "\t", json_encode($content, JSON_PRETTY_PRINT)));
 	}
 	
+	public function resetFile() {
+		if (file_exists($this->db_file)) {
+			unlink($this->db_file);
+		}
+		$this->setFile($this->getFile());
+	}
+	
 	public function sendError(string $msg, int $code = 404) :bool {
 		http_response_code($code);
 		$this->url_obj->send_json(["ok" => false, "reason" => $msg]);
diff --git a/utils/real_server.php b/utils/real_server.php
new file mode 100644
index 0000000..ecb26cf
--- /dev/null
+++ b/utils/real_server.php
@@ -0,0 +1,23 @@
+<?php
+
+function server_check() :bool {
+	if (!is_online_server()) return true;
+	return allow_server_access();
+}
+
+function is_online_server() :bool {
+	$hostname = gethostname();
+	return $hostname == 'www531.your-server.de';
+}
+
+function allow_server_access() :bool {
+	date_default_timezone_set('Europe/Berlin');
+
+	$currentDay = date('N');// Wochentag (1 = Montag, 7 = Sonntag)
+	$currentTime = date('H');// Aktuelle Stunde im 24-Stunden-Format
+
+	return
+		($currentDay === '2') &&
+		($currentTime >= '08' && $currentTime < '12')
+	;
+}
\ No newline at end of file