feat: implement sensor connection and health check endpoints

realtime/src/routes/connect.js

@@ -0,0 +1,35 @@
+const router = require('express').Router();
+const db = require('../store/db');
+const crypto = require('crypto');
+
+router.post('/connect/new', async (req, res) => {
+    const { name, code } = req.body;
+
+    if (!name || !code) {
+        return res.status(400).json({ error: 'name and code are required' });
+    }
+
+    if (code.length < 6) {
+        return res.status(400).json({ error: 'code must be at least 6 characters' });
+    }
+
+    const salt = crypto.randomBytes(16).toString('hex');
+    const hash = crypto.scryptSync(code, salt, 64).toString('hex');
+    const codeHash = `${salt}:${hash}`;
+
+    try {
+        await db.query('sensors',
+            'INSERT INTO sensors (name, code_hash) VALUES ($1, $2)',
+            [name, codeHash]
+        );
+        res.status(201).json({ status: 'ok' });
+    } catch (err) {
+        if (err.code === '23505') {
+            return res.status(409).json({ error: 'name already exists' });
+        }
+        console.error('Error creating sensor', err);
+        res.status(500).json({ error: 'internal server error' });
+    }
+});
+
+module.exports = router;

realtime/src/routes/sensors.js

@@ -0,0 +1,14 @@
+const router = require('express').Router();
+const db = require('../store/db');
+
+router.get('/sensors', async (req, res) => {
+    try {
+        const result = await db.query('SELECT id, name FROM sensors', [], 'sensors');
+        res.json(result.rows);
+    } catch (err) {
+        console.error('Error fetching sensors', err);
+        res.status(500).json({ error: 'internal server error' });
+    }
+});
+
+module.exports = router;