inital commit

server.js

@@ -0,0 +1,70 @@
+// server.js
+const express = require('express');
+const bodyParser = require('body-parser');
+const sqlite3 = require('sqlite3').verbose();
+const path = require('path');
+const http = require('http');
+const { Server } = require('socket.io');
+
+const app = express();
+const server = http.createServer(app);
+const io = new Server(server);
+
+app.use(bodyParser.json());
+app.use(express.static(path.join(__dirname, 'public')));
+
+// open (or create) the SQLite database file
+const db = new sqlite3.Database('positions.db', err => {
+  if (err) {
+    console.error('Could not open DB', err);
+    process.exit(1);
+  }
+});
+
+// create table if not exists
+db.run(
+  `CREATE TABLE IF NOT EXISTS positions (
+     square_id TEXT PRIMARY KEY,
+     fruit     TEXT
+   )`,
+  (err) => {
+    if (err) console.error('Could not ensure table', err);
+  }
+);
+
+// get all saved positions
+app.get('/api/positions', (req, res) => {
+  db.all('SELECT square_id, fruit FROM positions', (err, rows) => {
+    if (err) return res.status(500).json({ error: err.message });
+    // convert to an object. should look like this: { "1": "Apple", "2": "Banana", … }
+    const mapping = {};
+    rows.forEach(r => (mapping[r.square_id] = r.fruit));
+    res.json(mapping);
+  });
+});
+
+// save (or update) a single square’s item
+app.post('/api/positions', (req, res) => {
+  const { squareId, fruit } = req.body;
+  if (!squareId || typeof fruit !== 'string') {
+    return res.status(400).json({ error: 'squareId and fruit required' });
+  }
+  db.run(
+    `INSERT INTO positions (square_id, fruit)
+     VALUES (?, ?)
+     ON CONFLICT(square_id) DO UPDATE SET fruit=excluded.fruit`,
+    [squareId, fruit],
+    function (err) {
+      if (err) return res.status(500).json({ error: err.message });
+      // broadcast update via Socket.io
+      io.emit('update', { squareId, fruit });
+      res.json({ success: true });
+    }
+  );
+});
+
+// start server
+const PORT = process.env.PORT || 3000;
+server.listen(PORT, () => {
+  console.log(`Listening on http://localhost:${PORT}`);
+});