feat: implement user authentication and login modal, refactor backend

web/backend/routes/push.js

@@ -0,0 +1,73 @@
+import express from 'express';
+import { getPublicKey, getPushSubscriptions, savePushSubscriptions } from '../services/webPush.js';
+
+const router = express.Router();
+
+// Obtener clave pública VAPID
+router.get('/public-key', (req, res) => {
+  try {
+    const publicKey = getPublicKey();
+    res.json({ publicKey });
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
+// Suscribirse a notificaciones push
+router.post('/subscribe', async (req, res) => {
+  try {
+    const subscription = req.body;
+    
+    if (!subscription || !subscription.endpoint) {
+      return res.status(400).json({ error: 'Suscripción inválida' });
+    }
+    
+    const subscriptions = getPushSubscriptions();
+    
+    // Verificar si ya existe esta suscripción
+    const existingIndex = subscriptions.findIndex(
+      sub => sub.endpoint === subscription.endpoint
+    );
+    
+    if (existingIndex >= 0) {
+      subscriptions[existingIndex] = subscription;
+    } else {
+      subscriptions.push(subscription);
+    }
+    
+    savePushSubscriptions(subscriptions);
+    console.log(`✅ Nueva suscripción push guardada. Total: ${subscriptions.length}`);
+    
+    res.json({ success: true, totalSubscriptions: subscriptions.length });
+  } catch (error) {
+    console.error('Error guardando suscripción push:', error);
+    res.status(500).json({ error: error.message });
+  }
+});
+
+// Cancelar suscripción push
+router.post('/unsubscribe', async (req, res) => {
+  try {
+    const subscription = req.body;
+    
+    if (!subscription || !subscription.endpoint) {
+      return res.status(400).json({ error: 'Suscripción inválida' });
+    }
+    
+    const subscriptions = getPushSubscriptions();
+    const filtered = subscriptions.filter(
+      sub => sub.endpoint !== subscription.endpoint
+    );
+    
+    savePushSubscriptions(filtered);
+    console.log(`✅ Suscripción push cancelada. Total: ${filtered.length}`);
+    
+    res.json({ success: true, totalSubscriptions: filtered.length });
+  } catch (error) {
+    console.error('Error cancelando suscripción push:', error);
+    res.status(500).json({ error: error.message });
+  }
+});
+
+export default router;
+