70 lines
1.8 KiB
JavaScript
70 lines
1.8 KiB
JavaScript
const express = require('express');
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const fs = require('fs');
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const path = require('path');
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const app = express();
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const PORT = 9201;
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const ALERTS_FILE = path.join(__dirname, 'alerts.json');
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app.use(express.json());
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// Load/save alerts
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function loadAlerts() {
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try { return JSON.parse(fs.readFileSync(ALERTS_FILE, 'utf8')); }
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catch { return []; }
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}
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function saveAlerts(alerts) {
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fs.writeFileSync(ALERTS_FILE, JSON.stringify(alerts, null, 2));
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}
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// SSE clients
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const sseClients = new Set();
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// Serve dashboard
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app.get('/', (req, res) => {
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res.sendFile(path.join(__dirname, 'index.html'));
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});
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// List alerts
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app.get('/api/alerts', (req, res) => {
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res.json(loadAlerts().slice(-50).reverse());
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});
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// Push alert
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app.post('/api/alerts', (req, res) => {
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const { message, priority = 'info' } = req.body;
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if (!message) return res.status(400).json({ error: 'message required' });
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const alert = {
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id: Date.now().toString(36) + Math.random().toString(36).slice(2, 6),
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message,
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priority,
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timestamp: new Date().toISOString()
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};
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const alerts = loadAlerts();
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alerts.push(alert);
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// Keep last 100
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if (alerts.length > 100) alerts.splice(0, alerts.length - 100);
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saveAlerts(alerts);
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// Notify SSE clients
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for (const client of sseClients) {
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client.write(`data: ${JSON.stringify(alert)}\n\n`);
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}
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res.status(201).json(alert);
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});
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// SSE stream
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app.get('/api/alerts/stream', (req, res) => {
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res.writeHead(200, {
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'Content-Type': 'text/event-stream',
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'Cache-Control': 'no-cache',
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'Connection': 'keep-alive',
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});
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res.write('data: {"type":"connected"}\n\n');
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sseClients.add(res);
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req.on('close', () => sseClients.delete(res));
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});
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app.listen(PORT, '0.0.0.0', () => {
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console.log(`Alert dashboard running on http://0.0.0.0:${PORT}`);
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});
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