first commit

backend/src/index.js

@@ -0,0 +1,98 @@
+const express = require('express');
+const cors = require('cors');
+const { PrismaClient } = require('@prisma/client');
+const http = require('http');
+const { Server } = require('socket.io');
+
+const app = express();
+const prisma = new PrismaClient();
+
+app.use(cors());
+app.use(express.json());
+
+const server = http.createServer(app);
+const io = new Server(server, {
+  cors: {
+    origin: "*", 
+    methods: ["GET", "POST"]
+  }
+});
+
+// Hello World
+app.get('/', (req, res) => {
+  res.send('ALPR Backend Running');
+});
+
+// Plates CRUD
+app.get('/api/plates', async (req, res) => {
+  try {
+    const plates = await prisma.plate.findMany();
+    res.json(plates);
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+app.post('/api/plates', async (req, res) => {
+  const { number, owner, status } = req.body;
+  try {
+    const plate = await prisma.plate.create({
+      data: { number, owner, status: status || 'ALLOWED' }
+    });
+    res.json(plate);
+  } catch (err) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// Detection Endpoint (from Python)
+app.post('/api/detect', async (req, res) => {
+  const { plate_number } = req.body;
+  console.log(`Detected: ${plate_number}`);
+  
+  try {
+    // Check if plate exists
+    let plate = await prisma.plate.findUnique({
+      where: { number: plate_number }
+    });
+
+    let accessStatus = 'DENIED';
+    
+    if (plate && plate.status === 'ALLOWED') {
+      accessStatus = 'GRANTED';
+    } 
+
+    if (!plate) {
+       // Optional: Auto-create unknown plates?
+       // For now, treat as UNKNOWN (Denied)
+       accessStatus = 'UNKNOWN';
+    }
+
+    // Log the access attempt
+    const log = await prisma.accessLog.create({
+      data: {
+        plateNumber: plate_number,
+        accessStatus,
+        timestamp: new Date()
+      }
+    });
+
+    // Notify Frontend via WebSocket
+    io.emit('new_detection', {
+      plate: plate_number,
+      status: accessStatus,
+      timestamp: log.timestamp
+    });
+
+    res.json({ message: 'Processed', accessStatus });
+
+  } catch (err) {
+    console.error(err);
+    res.status(500).json({ error: err.message });
+  }
+});
+
+const PORT = process.env.PORT || 3000;
+server.listen(PORT, () => {
+  console.log(`Server running on port ${PORT}`);
+});