feat: add CORS support and enhance session routes for better sensor management

realtime/src/routes/sessions.js

@@ -1,7 +1,10 @@
 const router = require('express').Router();
-const db = require('../store/db');
 const { queryAll, query } = require('../store/redis');
 
+/**
+ * GET /sessions — Lista tutte le sessioni attive dei sensori.
+ * Legge da Redis le chiavi sensors:* (scritte da handler.js alla connessione)
+ */
 router.get('/', async (req, res) => {
     try {
         const keys = await queryAll('sensors');
@@ -23,38 +26,57 @@ router.get('/', async (req, res) => {
     }
 });
 
-router.get('/pending', (req, res) => {
+/**
+ * GET /sessions/pending — Lista token di connessione pendenti.
+ * Legge da Redis le chiavi sensors_pending:* (create da createConnectionToken)
+ */
+router.get('/pending', async (req, res) => {
     try {
-        const pendingTokens = queryAll('snsr_pending_token');
-        res.json(pendingTokens);
+        const keys = await queryAll('sensors_pending');
+        res.json(keys);
     } catch (err) {
         console.error('Error fetching pending tokens', err);
         res.status(500).json({ error: `Error fetching pending tokens, ${err}` });
     }
 });
 
-router.get('/connected', (req, res) => {
+/**
+ * GET /sessions/connected — Lista sensori attualmente connessi.
+ * Legge da Redis le chiavi sensor:* (scritte da appendAsConnection in handler.js)
+ */
+router.get('/connected', async (req, res) => {
     try {
-        const connectedSensors = queryAll('snsr_connected');
-        res.json(connectedSensors);
+        const keys = await queryAll('sensor');
+        const connected = [];
+        for (const key of keys) {
+            const name = key.replace('sensor:', '');
+            const info = await query(name, 'sensor');
+            if (info.status === 'connected') {
+                connected.push({ name, connectedAt: info.timestamp });
+            }
+        }
+        res.json(connected);
     } catch (err) {
         console.error('Error fetching connected sensors', err);
         res.status(500).json({ error: `Error fetching connected sensors, ${err}` });
     }
 });
 
+/**
+ * GET /sessions/connected/:id — Verifica se un sensore specifico è connesso.
+ */
 router.get('/connected/:id', async (req, res) => {
     const { id } = req.params;
     try {
-        const sensor = await query(`snsr_connected:${id}`);
-        if (!sensor) {
+        const info = await query(id, 'sensor');
+        if (!info || info.status !== 'connected') {
             return res.status(404).json({ error: 'sensor not connected' });
         }
-        res.json({ id, name: sensor });
+        res.json({ name: id, connectedAt: info.timestamp });
     } catch (err) {
         console.error('Error fetching sensor connection status', err);
         res.status(500).json({ error: `Error fetching sensor connection status, ${err}` });
     }
 });
 
-module.exports = router;
+module.exports = router;