Implement authentication and routing features with login and dashboard pages

src/components/Login.js

@@ -0,0 +1,31 @@
+export function renderLogin(onLogin) {
+  const loginContainer = document.createElement('div');
+  loginContainer.className = 'login-container';
+
+  loginContainer.innerHTML = `
+    <div class="login-card">
+      <h2 class="login-title">Iniciar Sesión</h2>
+      <form id="login-form">
+        <div class="form-group">
+          <label for="email">Email</label>
+          <input type="email" id="email" name="email" required autocomplete="email">
+        </div>
+        <div class="form-group">
+          <label for="password">Contraseña</label>
+          <input type="password" id="password" name="password" required autocomplete="current-password">
+        </div>
+        <button type="submit" class="login-button">Ingresar</button>
+      </form>
+      <p id="login-error" class="login-error"></p>
+    </div>
+  `;
+
+  loginContainer.querySelector('#login-form').addEventListener('submit', (e) => {
+    e.preventDefault();
+    const email = loginContainer.querySelector('#email').value;
+    const password = loginContainer.querySelector('#password').value;
+    onLogin(email, password);
+  });
+
+  return loginContainer;
+}

src/main.js

@@ -1,24 +1,4 @@
 import './style.css'
-import javascriptLogo from './javascript.svg'
-import viteLogo from '/vite.svg'
-import { setupCounter } from './counter.js'
+import { initRouter } from './router.js'
 
-document.querySelector('#app').innerHTML = `
-  <div>
-    <a href="https://vite.dev" target="_blank">
-      <img src="${viteLogo}" class="logo" alt="Vite logo" />
-    </a>
-    <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript" target="_blank">
-      <img src="${javascriptLogo}" class="logo vanilla" alt="JavaScript logo" />
-    </a>
-    <h1>Hello Vite!</h1>
-    <div class="card">
-      <button id="counter" type="button"></button>
-    </div>
-    <p class="read-the-docs">
-      Click on the Vite logo to learn more
-    </p>
-  </div>
-`
-
-setupCounter(document.querySelector('#counter'))
+initRouter()

src/pages/DashboardPage.js

@@ -0,0 +1,24 @@
+import { auth } from '../services/auth.js';
+
+export function renderDashboard() {
+  const user = auth.getUser();
+  const container = document.createElement('div');
+  container.className = 'dashboard';
+
+  container.innerHTML = `
+    <div class="dashboard-header">
+      <h1>Bienvenido, ${user?.email || 'Usuario'}</h1>
+      <button id="logout-button" class="logout-button">Cerrar Sesión</button>
+    </div>
+    <div class="dashboard-content">
+      <p>Dashboard protegido</p>
+    </div>
+  `;
+
+  container.querySelector('#logout-button').addEventListener('click', () => {
+    auth.logout();
+    window.location.hash = '#login';
+  });
+
+  return container;
+}

src/pages/LoginPage.js

@@ -0,0 +1,23 @@
+import { auth } from '../services/auth.js';
+import { renderLogin } from '../components/Login.js';
+
+export function renderLoginPage(onLoginSuccess) {
+  const container = document.createElement('div');
+  container.className = 'login-page';
+
+  const loginComponent = renderLogin((email, password) => {
+    if (auth.login(email, password)) {
+      if (onLoginSuccess) {
+        onLoginSuccess();
+      } else {
+        window.location.hash = '#dashboard';
+      }
+    } else {
+      const error = container.querySelector('#login-error');
+      error.textContent = 'Credenciales inválidas';
+    }
+  });
+
+  container.appendChild(loginComponent);
+  return container;
+}

src/router.js

@@ -0,0 +1,34 @@
+import { auth } from './services/auth.js';
+import { renderLoginPage } from './pages/LoginPage.js';
+import { renderDashboard } from './pages/DashboardPage.js';
+
+export function initRouter() {
+  const app = document.querySelector('#app');
+
+  function navigate() {
+    const hash = window.location.hash || '#login';
+
+    if (!auth.checkAuth() && hash !== '#login') {
+      window.location.hash = '#login';
+      return;
+    }
+
+    app.innerHTML = '';
+
+    switch (hash) {
+      case '#login':
+        app.appendChild(renderLoginPage(() => {
+          window.location.hash = '#dashboard';
+        }));
+        break;
+      case '#dashboard':
+        app.appendChild(renderDashboard());
+        break;
+      default:
+        window.location.hash = '#login';
+    }
+  }
+
+  window.addEventListener('hashchange', navigate);
+  navigate();
+}

src/services/auth.js

@@ -0,0 +1,37 @@
+export class Auth {
+  constructor() {
+    this.currentUser = null;
+    this.isAuthenticated = false;
+  }
+
+  login(email, password) {
+    if (email && password) {
+      this.currentUser = { email };
+      this.isAuthenticated = true;
+      localStorage.setItem('user', JSON.stringify(this.currentUser));
+      return true;
+    }
+    return false;
+  }
+
+  logout() {
+    this.currentUser = null;
+    this.isAuthenticated = false;
+    localStorage.removeItem('user');
+  }
+
+  checkAuth() {
+    const user = localStorage.getItem('user');
+    if (user) {
+      this.currentUser = JSON.parse(user);
+      this.isAuthenticated = true;
+    }
+    return this.isAuthenticated;
+  }
+
+  getUser() {
+    return this.currentUser;
+  }
+}
+
+export const auth = new Auth();

src/style.css

@@ -94,3 +94,116 @@ button:focus-visible {
     background-color: #f9f9f9;
   }
 }
+
+.login-container {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  min-height: 100vh;
+}
+
+.login-card {
+  background: #2a2a2a;
+  padding: 2.5rem;
+  border-radius: 12px;
+  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
+  width: 100%;
+  max-width: 400px;
+}
+
+.login-title {
+  color: #fff;
+  margin: 0 0 2rem 0;
+  font-size: 1.8rem;
+  text-align: center;
+}
+
+.form-group {
+  margin-bottom: 1.5rem;
+}
+
+.form-group label {
+  display: block;
+  color: #fff;
+  margin-bottom: 0.5rem;
+  font-weight: 500;
+}
+
+.form-group input {
+  width: 100%;
+  padding: 0.75rem;
+  border: 1px solid #444;
+  border-radius: 6px;
+  background: #1a1a1a;
+  color: #fff;
+  font-size: 1rem;
+  box-sizing: border-box;
+}
+
+.form-group input:focus {
+  outline: none;
+  border-color: #646cff;
+}
+
+.login-button {
+  width: 100%;
+  padding: 0.875rem;
+  background-color: #646cff;
+  color: white;
+  border: none;
+  border-radius: 6px;
+  font-size: 1rem;
+  font-weight: 600;
+  cursor: pointer;
+  transition: background-color 0.25s;
+}
+
+.login-button:hover {
+  background-color: #535bf2;
+  border-color: transparent;
+}
+
+.login-error {
+  color: #ff6b6b;
+  text-align: center;
+  margin-top: 1rem;
+  font-size: 0.9rem;
+}
+
+.dashboard {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 2rem;
+}
+
+.dashboard-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 2rem;
+}
+
+.dashboard-header h1 {
+  font-size: 2rem;
+  margin: 0;
+}
+
+.dashboard-content {
+  background: #2a2a2a;
+  padding: 2rem;
+  border-radius: 12px;
+}
+
+.logout-button {
+  background-color: #ff6b6b;
+  color: white;
+  padding: 0.5rem 1rem;
+  border: none;
+  border-radius: 6px;
+  cursor: pointer;
+}
+
+.logout-button:hover {
+  background-color: #fa5252;
+  border-color: transparent;
+}