modularize code, add dummy version of roverd

server/src/globals/config.js

@@ -0,0 +1,6 @@
+const path = require('path');
+
+module.exports = {
+  port: process.env.PORT || 8080,
+  staticDir: path.join(__dirname, '..', '..', 'public'),
+};

server/src/globals/http.js

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+const path = require('path');
+const http = require('http');
+const express = require('express');
+const morgan = require('morgan');
+const config = require('./config');
+
+const app = express();
+app.use(morgan('dev'));
+app.use(express.json());
+app.use(express.static(config.staticDir));
+
+const httpServer = http.createServer(app);
+
+module.exports = { app, httpServer };

server/src/globals/io.js

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+const { Server: SocketIOServer } = require('socket.io');
+const { httpServer } = require('./http');
+
+const io = new SocketIOServer(httpServer, {
+  cors: { origin: '*' },
+});
+
+module.exports = io;

server/src/globals/logger.js

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+function stamp(level, args) {
+  return [new Date().toISOString(), `[${level}]`, ...args];
+}
+
+module.exports = {
+  info: (...args) => console.log(...stamp('INFO', args)),
+  warn: (...args) => console.warn(...stamp('WARN', args)),
+  error: (...args) => console.error(...stamp('ERROR', args)),
+};

server/src/globals/ws.js

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+const { WebSocketServer } = require('ws');
+const { httpServer } = require('./http');
+const logger = require('./logger');
+
+const roverWSS = new WebSocketServer({ noServer: true });
+
+httpServer.on('upgrade', (req, socket, head) => {
+  if (req.url.startsWith('/rover')) {
+    roverWSS.handleUpgrade(req, socket, head, (ws) => {
+      roverWSS.emit('connection', ws, req);
+    });
+  } else {
+    socket.destroy();
+  }
+});
+
+roverWSS.on('connection', () => {
+  logger.info('Rover websocket connected');
+});
+
+module.exports = roverWSS;