init

.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# vitepress build output
+**/.vitepress/dist
+
+# vitepress cache directory
+**/.vitepress/cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*

index.ts

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+import { Server } from 'socket.io';
+import { createServer } from 'http';
+import express from 'express';
+import cors from 'cors';
+
+const app = express();
+app.use(cors());
+
+const httpServer = createServer(app);
+const io = new Server(httpServer, {
+  cors: {
+    origin: [
+      "http://localhost:3000",
+      "http://localhost:3030",
+      "http://localhost:3031",
+      "https://dev.duelfi.io",
+      "https://beta.duelfi.io"
+    ],
+    methods: ["GET", "POST"]
+  }
+});
+
+// Store recent messages in memory (you might want to use a database in production)
+const recentMessages: any[] = [];
+const MAX_MESSAGES = 100;
+
+io.on('connection', (socket) => {
+  console.log('User connected:', socket.id);
+
+  // Send recent messages to newly connected users
+  socket.emit('recent messages', recentMessages);
+
+  socket.on('chat message', (message) => {
+    // Add message to recent messages
+    recentMessages.push(message);
+    if (recentMessages.length > MAX_MESSAGES) {
+      recentMessages.shift();
+    }
+
+    // Broadcast message to all connected clients
+    io.emit('chat message', message);
+  });
+
+  socket.on('disconnect', () => {
+    console.log('User disconnected:', socket.id);
+  });
+});
+
+const PORT = 3040;
+httpServer.listen(PORT, () => {
+  console.log(`Socket.IO server running on port ${PORT}`);
+}); 

package.json

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+{
+  "name": "duelfi-chat-server",
+  "version": "1.0.0",
+  "description": "Socket.IO chat server for Duelfi",
+  "main": "index.ts",
+  "scripts": {
+    "start": "ts-node index.ts",
+    "dev": "nodemon --exec ts-node index.ts"
+  },
+  "dependencies": {
+    "cors": "^2.8.5",
+    "express": "^4.18.2",
+    "socket.io": "^4.7.2"
+  },
+  "devDependencies": {
+    "@types/cors": "^2.8.17",
+    "@types/express": "^4.17.21",
+    "@types/node": "^20.10.5",
+    "nodemon": "^3.0.2",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.3.3"
+  }
+} 

tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "es2018",
+    "module": "commonjs",
+    "outDir": "./dist",
+    "rootDir": "./",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true
+  },
+  "include": ["./**/*"],
+  "exclude": ["node_modules", "dist"]
+}