Create auth.js

forum/auth.js

@@ -0,0 +1,37 @@
+function getUsers() {
+  return JSON.parse(localStorage.getItem('users') || '{}');
+}
+
+function saveUsers(users) {
+  localStorage.setItem('users', JSON.stringify(users));
+}
+
+function register() {
+  const username = document.getElementById('reg-username').value.trim();
+  const password = document.getElementById('reg-password').value;
+
+  if (!username || !password) return alert("Fill in all fields");
+
+  const token = document.querySelector('[name="cf-turnstile-response"]')?.value;
+  if (!token) return alert("Please complete the CAPTCHA");
+
+  const users = getUsers();
+  if (users[username]) return alert("Username already taken");
+
+  users[username] = { password };
+  saveUsers(users);
+  localStorage.setItem('loggedInUser', username);
+  window.location.href = "index.html";
+}
+
+function login() {
+  const username = document.getElementById('login-username').value.trim();
+  const password = document.getElementById('login-password').value;
+
+  const users = getUsers();
+  if (!users[username]) return alert("User does not exist");
+  if (users[username].password !== password) return alert("Incorrect password");
+
+  localStorage.setItem('loggedInUser', username);
+  window.location.href = "index.html";
+}