updated

README.md

@@ -1 +1,280 @@
-# P2P Poll App
+
+# P2P Poll App
+
+A peer-to-peer polling application built with React, TypeScript, Tailwind CSS, Node.js, Yjs, and WebSocket for real-time collaborative voting.
+
+**Users can create polls, add answers, and vote in real-time with automatic P2P synchronization across all connected clients.**
+
+## Architecture
+
+**Hybrid P2P Approach:**
+- Backend serves as both a Yjs WebSocket provider (for state synchronization) and signaling server (for WebRTC peer discovery)
+- Clients sync poll data via Yjs CRDT for conflict-free merging
+- Direct P2P connections via WebRTC for real-time updates when possible
+- Server fallback ensures reliability when P2P fails
+
+## Tech Stack
+
+**Backend:**
+- Node.js + TypeScript
+- Express.js
+- WebSocket (ws)
+- y-websocket (Yjs WebSocket provider)
+- CORS support
+
+**Frontend:**
+- React 18 + TypeScript
+- Vite (build tool)
+- Tailwind CSS
+- Yjs (CRDT library)
+- y-websocket (server sync)
+- y-webrtc (P2P sync)
+- lucide-react (icons)
+
+## Project Structure
+
+```
+quicgroup/
+├── server/                 # Backend Node.js server
+│   ├── src/
+│   │   ├── index.ts       # Main server entry
+│   │   ├── yjs-server.ts  # Yjs WebSocket provider
+│   │   ├── signaling-server.ts  # WebRTC signaling
+│   │   ├── types/         # TypeScript types
+│   │   └── utils/         # Utilities
+│   ├── package.json
+│   └── tsconfig.json
+│
+└── frontend/              # React frontend
+    ├── src/
+    │   ├── components/    # React components
+    │   ├── hooks/         # Custom React hooks
+    │   ├── lib/           # Yjs setup and utilities
+    │   ├── types/         # TypeScript types
+    │   └── styles/        # CSS styles
+    ├── package.json
+    └── vite.config.ts
+```
+
+## Setup Instructions
+
+### Prerequisites
+- Node.js 18+ and npm
+
+### Backend Setup
+
+1. Navigate to server directory:
+```bash
+cd server
+```
+
+2. Install dependencies:
+```bash
+npm install
+```
+
+3. Copy environment file:
+```bash
+cp .env.example .env
+```
+
+4. Start the development server:
+```bash
+npm run dev
+```
+
+The server will run on `http://localhost:3000` with:
+- Yjs WebSocket: `ws://localhost:3000/yjs`
+- Signaling WebSocket: `ws://localhost:3000/signal`
+
+### Frontend Setup
+
+1. Navigate to frontend directory:
+```bash
+cd frontend
+```
+
+2. Install dependencies:
+```bash
+npm install
+```
+
+3. Copy environment file (optional):
+```bash
+cp .env.example .env
+```
+
+4. Start the development server:
+```bash
+npm run dev
+```
+
+The frontend will run on `http://localhost:5173`
+
+## Running the Application
+
+1. **Start Backend** (Terminal 1):
+```bash
+cd server
+npm run dev
+```
+
+2. **Start Frontend** (Terminal 2):
+```bash
+cd frontend
+npm run dev
+```
+
+3. **Open Browser:**
+   - Navigate to `http://localhost:5173`
+   - Open multiple tabs/windows to test P2P synchronization
+
+## Features
+
+### Dynamic Poll Creation
+- **Create Polls** - Any user can create new polls with custom questions
+- **Add Answers** - Anyone can add answer options to any poll
+- **Real-time Voting** - Vote on options with instant updates across all clients
+- **Smart Vote Tracking** - One vote per user per option (prevents duplicate voting)
+- **Visual Feedback** - Green border and " Voted" indicator on voted options
+- **User Attribution** - See who created each poll and option
+- **Live Vote Counts** - See vote percentages and counts update in real-time
+- **P2P Synchronization** - Uses Yjs CRDT for conflict-free state merging
+- **Connection Status** - Visual indicator showing WebSocket and peer connections
+- **Hybrid Architecture** - Combines WebSocket server sync with WebRTC P2P
+- **Beautiful UI** - Modern gradient design with Tailwind CSS
+
+## How to Use
+
+### Create a Poll
+1. Enter your question in the "Create a New Poll" form at the top
+2. Click "Create Poll"
+3. Your poll appears instantly for all connected users
+
+### Add Answer Options
+1. Find the poll you want to add an answer to
+2. Type your answer in the "Add a new option..." field
+3. Click "Add"
+4. Your answer appears instantly for all users
+
+### Vote on Options
+1. Click the vote button (thumbs up icon) on any option
+2. You can only vote once per option
+3. Voted options show a green border and " Voted" indicator
+4. Vote counts update in real-time across all clients
+
+### Multi-User Testing
+1. Open multiple browser tabs/windows
+2. Create polls from different tabs
+3. Add answers from different tabs
+4. Vote from different tabs
+5. Watch real-time synchronization in action!
+
+## How It Works
+
+### CRDT Synchronization
+The app uses Yjs (a CRDT library) to ensure all clients converge to the same state without conflicts:
+- Each client maintains a local Yjs document
+- Changes are automatically synced via WebSocket to the server
+- WebRTC provides direct P2P connections between clients
+- Yjs handles merge conflicts automatically
+- One vote per user per option is enforced via `votedBy` tracking
+
+## Data Model
+```typescript
+{
+  polls: Array<{
+    id: string,
+    question: string,
+    createdBy: string,
+    timestamp: number,
+    options: Array<{
+      id: string,
+      text: string,
+      votes: number,
+      votedBy: string[],  // Tracks which users have voted
+      createdBy: string,
+      timestamp: number
+    }>
+  }>
+}
+```
+
+## Testing P2P Functionality
+
+1. Open the app in multiple browser tabs/windows
+2. **Create polls** from different tabs - they appear everywhere instantly
+3. **Add answer options** from different tabs to the same poll
+4. **Vote** from different tabs - watch vote counts update in real-time
+5. Try voting twice on the same option - it won't let you!
+6. Check the connection status indicator for peer count
+7. Verify visual feedback (green border) on options you've voted on
+
+## Development
+
+### Backend Scripts
+- `npm run dev` - Start development server with hot reload
+- `npm run build` - Build for production
+- `npm start` - Run production build
+
+### Frontend Scripts
+- `npm run dev` - Start Vite dev server
+- `npm run build` - Build for production
+- `npm run preview` - Preview production build
+
+## Environment Variables
+
+### Backend (.env)
+```
+PORT=3000
+YJS_WS_PORT=1234
+NODE_ENV=development
+CORS_ORIGIN=http://localhost:5173
+```
+
+### Frontend (.env)
+```
+VITE_WS_URL=ws://localhost:3000
+```
+
+## Components
+
+### Frontend Components
+- **PollView** - Main view showing all polls and create poll form
+- **CreatePoll** - Form to create new polls
+- **PollCard** - Individual poll display with metadata
+- **OptionList** - List of answer options with vote tracking
+- **AddOption** - Form to add new answer options
+- **VoteButton** - Vote button with disabled state for voted options
+- **ConnectionStatus** - Shows WebSocket and P2P connection status
+
+### Key Functions
+- `createPoll(question)` - Create a new poll
+- `addOption(pollId, text)` - Add an option to a specific poll
+- `vote(pollId, optionId)` - Vote on an option (one vote per user)
+- `hasVoted(option)` - Check if current user has voted on an option
+
+## User Tracking
+
+Each user gets a unique ID stored in localStorage:
+- Format: `user-xxxxxxxxx`
+- Used to track poll/option creators
+- Used to prevent duplicate voting
+- Persists across browser sessions
+
+## Future Enhancements
+
+- [ ] Edit/delete polls and options
+- [ ] User nicknames instead of IDs
+- [ ] Poll expiration/closing
+- [ ] Vote history and analytics
+- [ ] Export poll results
+- [ ] Persistent storage (database)
+- [ ] Dark mode toggle
+- [ ] Mobile responsive improvements
+- [ ] Poll categories/tags
+- [ ] Search/filter polls
+
+## License
+
+MIT

frontend/.env.example

@@ -0,0 +1 @@
+VITE_WS_URL=ws://localhost:5000

frontend/.gitignore

@@ -0,0 +1,6 @@
+node_modules
+dist
+dist-ssr
+*.local
+.env
+.DS_Store

frontend/index.html

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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>P2P Poll App</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>

frontend/package.json

@@ -0,0 +1,35 @@
+{
+  "name": "p2p-poll-frontend",
+  "private": true,
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc && vite build",
+    "preview": "vite preview",
+    "lint": "eslint . --ext ts,tsx --report-unused-disable-directives --max-warnings 0"
+  },
+  "dependencies": {
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0",
+    "yjs": "^13.6.8",
+    "y-websocket": "^1.5.0",
+    "y-webrtc": "^10.2.5",
+    "lucide-react": "^0.294.0"
+  },
+  "devDependencies": {
+    "@types/react": "^18.2.37",
+    "@types/react-dom": "^18.2.15",
+    "@typescript-eslint/eslint-plugin": "^6.10.0",
+    "@typescript-eslint/parser": "^6.10.0",
+    "@vitejs/plugin-react": "^4.2.0",
+    "autoprefixer": "^10.4.16",
+    "eslint": "^8.53.0",
+    "eslint-plugin-react-hooks": "^4.6.0",
+    "eslint-plugin-react-refresh": "^0.4.4",
+    "postcss": "^8.4.31",
+    "tailwindcss": "^3.3.5",
+    "typescript": "^5.2.2",
+    "vite": "^5.0.0"
+  }
+}

frontend/postcss.config.js

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+export default {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+}

frontend/src/App.tsx

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+import { PollView } from './components/PollView';
+import './styles/index.css';
+
+function App() {
+  return <PollView />;
+}
+
+export default App;

frontend/src/components/AddOption.tsx

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+import { useState } from 'react';
+import { Plus } from 'lucide-react';
+
+interface AddOptionProps {
+  onAdd: (text: string) => void;
+}
+
+export function AddOption({ onAdd }: AddOptionProps) {
+  const [text, setText] = useState('');
+
+  const handleSubmit = (e: React.FormEvent) => {
+    e.preventDefault();
+    if (text.trim()) {
+      onAdd(text);
+      setText('');
+    }
+  };
+
+  return (
+    <form onSubmit={handleSubmit} className="flex gap-2">
+      <input
+        type="text"
+        value={text}
+        onChange={(e) => setText(e.target.value)}
+        placeholder="Add a new option..."
+        className="flex-1 px-4 py-3 rounded-lg bg-white/10 border border-white/20 text-white placeholder-white/50 focus:outline-none focus:ring-2 focus:ring-white/30"
+      />
+      <button
+        type="submit"
+        disabled={!text.trim()}
+        className="px-6 py-3 bg-white text-purple-600 rounded-lg font-semibold hover:bg-white/90 disabled:opacity-50 disabled:cursor-not-allowed transition-all duration-200 flex items-center gap-2"
+      >
+        <Plus className="w-5 h-5" />
+        Add
+      </button>
+    </form>
+  );
+}

frontend/src/components/ConnectionStatus.tsx

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+import { Wifi, WifiOff, Users } from 'lucide-react';
+
+interface ConnectionStatusProps {
+  isConnected: boolean;
+  wsProvider: any;
+  webrtcProvider: any;
+}
+
+export function ConnectionStatus({ isConnected, wsProvider, webrtcProvider }: ConnectionStatusProps) {
+  const peerCount = webrtcProvider?.room?.peers?.size || 0;
+
+  return (
+    <div className="flex items-center gap-4 text-white/90 text-sm">
+      <div className="flex items-center gap-2">
+        {isConnected ? (
+          <>
+            <Wifi className="w-4 h-4 text-green-400" />
+            <span>Connected</span>
+          </>
+        ) : (
+          <>
+            <WifiOff className="w-4 h-4 text-red-400" />
+            <span>Disconnected</span>
+          </>
+        )}
+      </div>
+      
+      <div className="flex items-center gap-2">
+        <Users className="w-4 h-4" />
+        <span>{peerCount} peer{peerCount !== 1 ? 's' : ''}</span>
+      </div>
+    </div>
+  );
+}

frontend/src/components/CreatePoll.tsx

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+import { useState } from 'react';
+import { Plus } from 'lucide-react';
+
+interface CreatePollProps {
+  onCreate: (question: string) => void;
+}
+
+export function CreatePoll({ onCreate }: CreatePollProps) {
+  const [question, setQuestion] = useState('');
+
+  const handleSubmit = (e: React.FormEvent) => {
+    e.preventDefault();
+    if (question.trim()) {
+      onCreate(question);
+      setQuestion('');
+    }
+  };
+
+  return (
+    <form onSubmit={handleSubmit} className="mb-8">
+      <div className="bg-white/10 backdrop-blur-lg rounded-2xl shadow-2xl p-6 border border-white/20">
+        <h2 className="text-xl font-bold text-white mb-4">Create a New Poll</h2>
+        <div className="flex gap-2">
+          <input
+            type="text"
+            value={question}
+            onChange={(e) => setQuestion(e.target.value)}
+            placeholder="Enter your question..."
+            className="flex-1 px-4 py-3 rounded-lg bg-white/10 border border-white/20 text-white placeholder-white/50 focus:outline-none focus:ring-2 focus:ring-white/30"
+          />
+          <button
+            type="submit"
+            disabled={!question.trim()}
+            className="px-6 py-3 bg-white text-purple-600 rounded-lg font-semibold hover:bg-white/90 disabled:opacity-50 disabled:cursor-not-allowed transition-all duration-200 flex items-center gap-2"
+          >
+            <Plus className="w-5 h-5" />
+            Create Poll
+          </button>
+        </div>
+      </div>
+    </form>
+  );
+}

frontend/src/components/OptionList.tsx

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+import { PollOption } from '../types/poll.types';
+import { VoteButton } from './VoteButton';
+
+interface OptionListProps {
+  options: PollOption[];
+  onVote: (optionId: string) => void;
+  hasVoted?: (option: PollOption) => boolean;
+}
+
+export function OptionList({ options, onVote, hasVoted }: OptionListProps) {
+  const totalVotes = options.reduce((sum, opt) => sum + opt.votes, 0);
+
+  const sortedOptions = [...options].sort((a, b) => b.votes - a.votes);
+
+  return (
+    <div className="space-y-3">
+      {sortedOptions.length === 0 ? (
+        <div className="text-center py-8 text-white/60">
+          No options yet. Add one to get started!
+        </div>
+      ) : (
+        sortedOptions.map((option) => {
+          const percentage = totalVotes > 0 ? (option.votes / totalVotes) * 100 : 0;
+          const userHasVoted = hasVoted ? hasVoted(option) : false;
+          
+          return (
+            <div
+              key={option.id}
+              className={`bg-white/10 backdrop-blur-sm rounded-lg p-4 border transition-all duration-200 ${
+                userHasVoted 
+                  ? 'border-green-400/50 bg-green-400/10' 
+                  : 'border-white/20 hover:border-white/30'
+              }`}
+            >
+              <div className="flex items-center justify-between mb-2">
+                <span className="text-white font-medium text-lg">
+                  {option.text}
+                  {userHasVoted && <span className="ml-2 text-green-400 text-sm">✓ Voted</span>}
+                </span>
+                <VoteButton optionId={option.id} votes={option.votes} onVote={onVote} disabled={userHasVoted} />
+              </div>
+              
+              <div className="w-full bg-white/10 rounded-full h-2 overflow-hidden">
+                <div
+                  className="bg-gradient-to-r from-green-400 to-blue-500 h-full transition-all duration-500 ease-out"
+                  style={{ width: `${percentage}%` }}
+                />
+              </div>
+              
+              <div className="mt-2 flex justify-between text-xs text-white/60">
+                <span>by {option.createdBy}</span>
+                <span>{percentage.toFixed(1)}%</span>
+              </div>
+            </div>
+          );
+        })
+      )}
+    </div>
+  );
+}

frontend/src/components/PollCard.tsx

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+import { Poll } from '../types/poll.types';
+import { AddOption } from './AddOption';
+import { OptionList } from './OptionList';
+import { User, Clock } from 'lucide-react';
+
+interface PollCardProps {
+  poll: Poll;
+  onAddOption: (pollId: string, text: string) => void;
+  onVote: (pollId: string, optionId: string) => void;
+  hasVoted: (option: any) => boolean;
+}
+
+export function PollCard({ poll, onAddOption, onVote, hasVoted }: PollCardProps) {
+  const handleAddOption = (text: string) => {
+    onAddOption(poll.id, text);
+  };
+
+  const handleVote = (optionId: string) => {
+    onVote(poll.id, optionId);
+  };
+
+  const formatTime = (timestamp: number) => {
+    const date = new Date(timestamp);
+    return date.toLocaleString();
+  };
+
+  return (
+    <div className="bg-white/10 backdrop-blur-lg rounded-2xl shadow-2xl p-8 border border-white/20 mb-6">
+      <div className="mb-6">
+        <h2 className="text-3xl font-bold text-white mb-3">{poll.question}</h2>
+        <div className="flex items-center gap-4 text-white/60 text-sm">
+          <div className="flex items-center gap-1">
+            <User className="w-4 h-4" />
+            <span>{poll.createdBy}</span>
+          </div>
+          <div className="flex items-center gap-1">
+            <Clock className="w-4 h-4" />
+            <span>{formatTime(poll.timestamp)}</span>
+          </div>
+        </div>
+      </div>
+
+      <div className="mb-6">
+        <AddOption onAdd={handleAddOption} />
+      </div>
+
+      <OptionList options={poll.options} onVote={handleVote} hasVoted={hasVoted} />
+    </div>
+  );
+}

frontend/src/components/PollView.tsx

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+import { RefreshCw } from 'lucide-react';
+import { usePoll } from '../hooks/usePoll';
+import { CreatePoll } from './CreatePoll';
+import { PollCard } from './PollCard';
+import { ConnectionStatus } from './ConnectionStatus';
+
+export function PollView() {
+  const { polls, createPoll, addOption, vote, hasVoted, isConnected, wsProvider, webrtcProvider } = usePoll();
+
+  return (
+    <div className="min-h-screen p-4 py-8">
+      <div className="max-w-4xl mx-auto">
+        <div className="mb-8 flex items-center justify-between">
+          <div>
+            <h1 className="text-4xl font-bold text-white mb-2">P2P Polling App</h1>
+            <p className="text-white/70">Create polls, add answers, and vote in real-time</p>
+          </div>
+          <ConnectionStatus 
+            isConnected={isConnected} 
+            wsProvider={wsProvider}
+            webrtcProvider={webrtcProvider}
+          />
+        </div>
+
+        <CreatePoll onCreate={createPoll} />
+
+        {polls.length === 0 ? (
+          <div className="bg-white/10 backdrop-blur-lg rounded-2xl shadow-2xl p-12 border border-white/20 text-center">
+            <p className="text-white/60 text-lg mb-2">No polls yet!</p>
+            <p className="text-white/40">Create the first poll to get started.</p>
+          </div>
+        ) : (
+          <div className="space-y-6">
+            {polls.map((poll) => (
+              <PollCard
+                key={poll.id}
+                poll={poll}
+                onAddOption={addOption}
+                onVote={vote}
+                hasVoted={hasVoted}
+              />
+            ))}
+          </div>
+        )}
+
+        <div className="mt-8 text-center text-white/50 text-sm">
+          <p>QUIC P2P Experiment !</p>
+          <p className="flex items-center justify-center gap-2 mt-1">
+            <RefreshCw className="w-4 h-4" />
+            Real-time P2P synchronization with Yjs
+          </p>
+          <p className="mt-1">Open multiple tabs to see live updates!</p>
+        </div>
+      </div>
+    </div>
+  );
+}

frontend/src/components/VoteButton.tsx

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+import { ThumbsUp } from 'lucide-react';
+
+interface VoteButtonProps {
+  optionId: string;
+  votes: number;
+  onVote: (optionId: string) => void;
+  disabled?: boolean;
+}
+
+export function VoteButton({ optionId, votes, onVote, disabled = false }: VoteButtonProps) {
+  return (
+    <button
+      onClick={() => !disabled && onVote(optionId)}
+      disabled={disabled}
+      className={`flex items-center gap-2 px-4 py-2 rounded-lg transition-all duration-200 text-white font-medium ${
+        disabled 
+          ? 'bg-white/10 cursor-not-allowed opacity-60' 
+          : 'bg-white/20 hover:bg-white/30'
+      }`}
+    >
+      <ThumbsUp className="w-4 h-4" />
+      <span>{votes}</span>
+    </button>
+  );
+}

frontend/src/hooks/usePoll.ts

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+import { useCallback } from 'react';
+import { pollManager } from '../lib/poll-manager';
+import { useYjsSync } from './useYjsSync';
+
+export function usePoll() {
+  const { polls, isConnected, wsProvider, webrtcProvider } = useYjsSync();
+
+  const createPoll = useCallback((question: string) => {
+    return pollManager.createPoll(question);
+  }, []);
+
+  const addOption = useCallback((pollId: string, text: string) => {
+    pollManager.addOption(pollId, text);
+  }, []);
+
+  const vote = useCallback((pollId: string, optionId: string) => {
+    pollManager.vote(pollId, optionId);
+  }, []);
+
+  const hasVoted = useCallback((option: any) => {
+    return pollManager.hasVoted(option);
+  }, []);
+
+  const userId = pollManager.getUserId();
+
+  return {
+    polls,
+    createPoll,
+    addOption,
+    vote,
+    hasVoted,
+    userId,
+    isConnected,
+    wsProvider,
+    webrtcProvider
+  };
+}

frontend/src/hooks/useYjsSync.ts

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+import { useEffect, useState } from 'react';
+import { Poll } from '../types/poll.types';
+import { 
+  initializeProviders, 
+  destroyProviders, 
+  yPolls,
+  wsProvider,
+  webrtcProvider 
+} from '../lib/yjs-setup';
+
+export function useYjsSync() {
+  const [polls, setPolls] = useState<Poll[]>([]);
+  const [isConnected, setIsConnected] = useState(false);
+
+  useEffect(() => {
+    console.log('[SYNC] Initializing Yjs sync hook');
+    const { wsProvider: ws } = initializeProviders();
+
+    const updatePolls = () => {
+      const currentPolls = Array.from(yPolls.values());
+      console.log('[SYNC] Polls updated, count:', currentPolls.length);
+      setPolls(currentPolls);
+    };
+
+    yPolls.observe(updatePolls);
+    updatePolls();
+
+    const handleStatus = (event: { status: string }) => {
+      console.log('[SYNC] WebSocket status event:', event.status);
+      const connected = event.status === 'connected';
+      setIsConnected(connected);
+      console.log('[SYNC] Connection state set to:', connected);
+    };
+
+    ws?.on('status', handleStatus);
+
+    return () => {
+      yPolls.unobserve(updatePolls);
+      ws?.off('status', handleStatus);
+      destroyProviders();
+    };
+  }, []);
+
+  return { 
+    polls, 
+    isConnected,
+    wsProvider,
+    webrtcProvider
+  };
+}

frontend/src/lib/poll-manager.ts

@@ -0,0 +1,43 @@
+import { PollOption } from '../types/poll.types';
+import { createPoll as yjsCreatePoll, addOption as yjsAddOption, voteForOption as yjsVoteForOption } from './yjs-setup';
+
+export class PollManager {
+  private userId: string;
+
+  constructor() {
+    this.userId = this.generateUserId();
+  }
+
+  private generateUserId(): string {
+    const stored = localStorage.getItem('p2p-poll-user-id');
+    if (stored) return stored;
+    
+    const newId = 'user-' + Math.random().toString(36).substr(2, 9);
+    localStorage.setItem('p2p-poll-user-id', newId);
+    return newId;
+  }
+
+  getUserId(): string {
+    return this.userId;
+  }
+
+  createPoll(question: string): string {
+    if (!question.trim()) return '';
+    return yjsCreatePoll(question.trim(), this.userId);
+  }
+
+  addOption(pollId: string, text: string): void {
+    if (!text.trim()) return;
+    yjsAddOption(pollId, text.trim(), this.userId);
+  }
+
+  vote(pollId: string, optionId: string): void {
+    yjsVoteForOption(pollId, optionId, this.userId);
+  }
+
+  hasVoted(option: PollOption): boolean {
+    return option.votedBy.includes(this.userId);
+  }
+}
+
+export const pollManager = new PollManager();

frontend/src/lib/yjs-setup.ts

@@ -0,0 +1,287 @@
+import * as Y from 'yjs';
+import { WebsocketProvider } from 'y-websocket';
+import { WebrtcProvider } from 'y-webrtc';
+import { Poll, PollOption } from '../types/poll.types';
+
+const WS_URL = import.meta.env.VITE_WS_URL || 'ws://localhost:5000';
+const ROOM_NAME = 'default-poll';
+
+function getSignalingUrl(wsUrl: string): string {
+  try {
+    const url = new URL(wsUrl);
+    const protocol = url.protocol === 'ws:' ? 'ws' : 'wss';
+    return `${protocol}://${url.host}/signal`;
+  } catch (error) {
+    console.error('Invalid WebSocket URL:', wsUrl, error);
+    return wsUrl + '/signal';
+  }
+}
+
+export const ydoc = new Y.Doc();
+
+export const yPolls = ydoc.getMap<Poll>('polls');
+
+export let wsProvider: WebsocketProvider | null = null;
+export let webrtcProvider: WebrtcProvider | null = null;
+
+let wsReconnectAttempts = 0;
+let webrtcReconnectAttempts = 0;
+const MAX_RECONNECT_ATTEMPTS = 5;
+const BASE_RECONNECT_DELAY = 1000;
+
+interface ConnectionMetrics {
+  rtt: number;
+  bandwidth: number;
+  packetLoss: number;
+  lastUpdated: number;
+}
+
+const connectionMetrics: ConnectionMetrics = {
+  rtt: 0,
+  bandwidth: 0,
+  packetLoss: 0,
+  lastUpdated: Date.now()
+};
+
+function getReconnectDelay(attempts: number): number {
+  return Math.min(BASE_RECONNECT_DELAY * Math.pow(2, attempts), 30000);
+}
+
+export function getConnectionMetrics(): ConnectionMetrics {
+  return { ...connectionMetrics };
+}
+
+export function initializeProviders() {
+  console.log('[INIT] Initializing providers with WS_URL:', WS_URL);
+  console.log('[INIT] Connecting to WebSocket:', WS_URL + '/yjs');
+  console.log('[INIT] Room name:', ROOM_NAME);
+  console.log('[INIT] Signaling URL:', getSignalingUrl(WS_URL));
+
+  wsProvider = new WebsocketProvider(
+    WS_URL + '/yjs',
+    ROOM_NAME,
+    ydoc,
+    { connect: true }
+  );
+
+  webrtcProvider = new WebrtcProvider(
+    ROOM_NAME,
+    ydoc,
+    { 
+      signaling: [getSignalingUrl(WS_URL)],
+      password: null,
+      awareness: wsProvider.awareness,
+      maxConns: 20,
+      filterBcConns: true,
+      peerOpts: {}
+    }
+  );
+
+  wsProvider.on('status', (event: { status: string }) => {
+    console.log('[WS] WebSocket status changed:', event.status);
+    
+    if (event.status === 'connected') {
+      wsReconnectAttempts = 0;
+      console.log('[WS] Successfully connected to WebSocket');
+    } else if (event.status === 'disconnected') {
+      console.log('[WS] WebSocket disconnected');
+      if (wsReconnectAttempts < MAX_RECONNECT_ATTEMPTS) {
+        const delay = getReconnectDelay(wsReconnectAttempts);
+        console.log(`[WS] Reconnecting in ${delay}ms (attempt ${wsReconnectAttempts + 1})`);
+        setTimeout(() => {
+          wsReconnectAttempts++;
+          try {
+            wsProvider?.connect();
+          } catch (error) {
+            console.error('[WS] Failed to reconnect:', error);
+          }
+        }, delay);
+      } else {
+        console.error('[WS] Max reconnection attempts reached');
+      }
+    }
+  });
+
+  wsProvider.on('connection-error', (error: any) => {
+    console.error('[WS] Connection error:', error);
+  });
+
+  webrtcProvider.on('synced', (synced: boolean) => {
+    console.log('[WEBRTC] Synced:', synced);
+    if (synced) {
+      webrtcReconnectAttempts = 0;
+    }
+  });
+
+  webrtcProvider.on('peers', (peers: any) => {
+    console.log('[WEBRTC] Peers changed:', peers.size, 'peers');
+    if (peers.size === 0 && webrtcReconnectAttempts < MAX_RECONNECT_ATTEMPTS) {
+      const delay = getReconnectDelay(webrtcReconnectAttempts);
+      console.log(`[WEBRTC] No peers, reconnecting in ${delay}ms (attempt ${webrtcReconnectAttempts + 1})`);
+      setTimeout(() => {
+        webrtcReconnectAttempts++;
+        try {
+          webrtcProvider?.connect();
+        } catch (error) {
+          console.error('[WEBRTC] Failed to reconnect:', error);
+        }
+      }, delay);
+    } else if (peers.size > 0) {
+      webrtcReconnectAttempts = 0;
+      console.log('[WEBRTC] Connected to', peers.size, 'peers');
+    }
+  });
+
+  // Periodically collect WebRTC stats
+  const statsInterval = setInterval(async () => {
+    if (webrtcProvider && webrtcProvider.room) {
+      let totalRtt = 0;
+      let totalBandwidth = 0;
+      let peerCount = 0;
+
+      // Access peers through the room's internal structure
+      const room = webrtcProvider.room as any;
+      if (room.peers) {
+        for (const peer of room.peers.values()) {
+          try {
+            if (peer.peerConnection) {
+              const stats = await peer.peerConnection.getStats();
+              stats.forEach((report: any) => {
+                if (report.type === 'remote-inbound-rtp' || report.type === 'inbound-rtp') {
+                  totalRtt += report.roundTripTime || 0;
+                }
+                if (report.type === 'outbound-rtp') {
+                  totalBandwidth += report.bytesSent || 0;
+                }
+              });
+              peerCount++;
+            }
+          } catch (error) {
+            console.error('Failed to get WebRTC stats:', error);
+          }
+        }
+      }
+
+      if (peerCount > 0) {
+        connectionMetrics.rtt = totalRtt / peerCount;
+        connectionMetrics.bandwidth = totalBandwidth;
+        connectionMetrics.packetLoss = 0; // Would need more complex calculation
+        connectionMetrics.lastUpdated = Date.now();
+      }
+    }
+  }, 5000);
+
+  // Cleanup stats interval on destroy
+  const originalDestroy = webrtcProvider.destroy;
+  webrtcProvider.destroy = function() {
+    clearInterval(statsInterval);
+    originalDestroy.call(this);
+  };
+
+  return { wsProvider, webrtcProvider };
+}
+
+export function destroyProviders() {
+  wsProvider?.destroy();
+  webrtcProvider?.destroy();
+}
+
+export function createPoll(question: string, createdBy: string): string {
+  const pollId = crypto.randomUUID();
+  const poll: Poll = {
+    id: pollId,
+    question,
+    createdBy,
+    timestamp: Date.now(),
+    options: []
+  };
+  
+  yPolls.set(pollId, poll);
+  return pollId;
+}
+
+export function addOption(pollId: string, text: string, createdBy: string): void {
+  try {
+    ydoc.transact(() => {
+      const poll = yPolls.get(pollId);
+      
+      if (!poll) {
+        console.error(`Poll not found: ${pollId}`);
+        throw new Error('Poll not found');
+      }
+      
+      const option: PollOption = {
+        id: crypto.randomUUID(),
+        text,
+        votes: 0,
+        votedBy: [],
+        createdBy,
+        timestamp: Date.now()
+      };
+      
+      const updatedPoll = {
+        ...poll,
+        options: [...poll.options, option]
+      };
+      
+      yPolls.set(pollId, updatedPoll);
+    });
+  } catch (error) {
+    console.error('Failed to add option:', error);
+    throw error;
+  }
+}
+
+export function voteForOption(pollId: string, optionId: string, userId: string): void {
+  try {
+    ydoc.transact(() => {
+      const poll = yPolls.get(pollId);
+      
+      if (!poll) {
+        console.error(`Poll not found: ${pollId}`);
+        throw new Error('Poll not found');
+      }
+      
+      const optionIndex = poll.options.findIndex(opt => opt.id === optionId);
+      
+      if (optionIndex === -1) {
+        console.error(`Option not found: ${optionId}`);
+        throw new Error('Option not found');
+      }
+      
+      const option = poll.options[optionIndex];
+      
+      if (option.votedBy.includes(userId)) {
+        console.log(`User ${userId} already voted for option ${optionId}`);
+        return;
+      }
+      
+      const updatedOption = {
+        ...option,
+        votes: option.votes + 1,
+        votedBy: [...option.votedBy, userId]
+      };
+      
+      const updatedOptions = [...poll.options];
+      updatedOptions[optionIndex] = updatedOption;
+      
+      const updatedPoll = {
+        ...poll,
+        options: updatedOptions
+      };
+      
+      yPolls.set(pollId, updatedPoll);
+    });
+  } catch (error) {
+    console.error('Failed to vote for option:', error);
+    throw error;
+  }
+}
+
+export function getPolls(): Poll[] {
+  return Array.from(yPolls.values());
+}
+
+export function getPoll(pollId: string): Poll | undefined {
+  return yPolls.get(pollId);
+}

frontend/src/main.tsx

@@ -0,0 +1,9 @@
+import React from 'react';
+import ReactDOM from 'react-dom/client';
+import App from './App';
+
+ReactDOM.createRoot(document.getElementById('root')!).render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>,
+);

frontend/src/styles/index.css

@@ -0,0 +1,17 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+#root {
+  min-height: 100vh;
+  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+}

frontend/src/types/poll.types.ts

@@ -0,0 +1,22 @@
+export interface PollOption {
+  id: string;
+  text: string;
+  votes: number;
+  votedBy: string[];
+  createdBy: string;
+  timestamp: number;
+}
+
+export interface Poll {
+  id: string;
+  question: string;
+  createdBy: string;
+  timestamp: number;
+  options: PollOption[];
+}
+
+export interface ConnectionStatus {
+  websocket: boolean;
+  webrtc: boolean;
+  peers: number;
+}

frontend/tailwind.config.js

@@ -0,0 +1,11 @@
+/** @type {import('tailwindcss').Config} */
+export default {
+  content: [
+    "./index.html",
+    "./src/**/*.{js,ts,jsx,tsx}",
+  ],
+  theme: {
+    extend: {},
+  },
+  plugins: [],
+}

frontend/tsconfig.json

@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "useDefineForClassFields": true,
+    "lib": ["ES2020", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "skipLibCheck": true,
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "react-jsx",
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "include": ["src"],
+  "references": [{ "path": "./tsconfig.node.json" }]
+}

frontend/tsconfig.node.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "skipLibCheck": true,
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["vite.config.ts"]
+}

frontend/vite.config.ts

@@ -0,0 +1,10 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+export default defineConfig({
+  plugins: [react()],
+  server: {
+    port: 5173,
+    host: true
+  }
+})

p2p-poll/.gitignore

@@ -1,24 +0,0 @@
-# Nuxt dev/build outputs
-.output
-.data
-.nuxt
-.nitro
-.cache
-dist
-
-# Node dependencies
-node_modules
-
-# Logs
-logs
-*.log
-
-# Misc
-.DS_Store
-.fleet
-.idea
-
-# Local env files
-.env
-.env.*
-!.env.example

p2p-poll/README.md

@@ -1,75 +0,0 @@
-# Nuxt Minimal Starter
-
-Look at the [Nuxt documentation](https://nuxt.com/docs/getting-started/introduction) to learn more.
-
-## Setup
-
-Make sure to install dependencies:
-
-```bash
-# npm
-npm install
-
-# pnpm
-pnpm install
-
-# yarn
-yarn install
-
-# bun
-bun install
-```
-
-## Development Server
-
-Start the development server on `http://localhost:3000`:
-
-```bash
-# npm
-npm run dev
-
-# pnpm
-pnpm dev
-
-# yarn
-yarn dev
-
-# bun
-bun run dev
-```
-
-## Production
-
-Build the application for production:
-
-```bash
-# npm
-npm run build
-
-# pnpm
-pnpm build
-
-# yarn
-yarn build
-
-# bun
-bun run build
-```
-
-Locally preview production build:
-
-```bash
-# npm
-npm run preview
-
-# pnpm
-pnpm preview
-
-# yarn
-yarn preview
-
-# bun
-bun run preview
-```
-
-Check out the [deployment documentation](https://nuxt.com/docs/getting-started/deployment) for more information.

p2p-poll/app/app.vue

@@ -1,152 +0,0 @@
-
-
-<style>
-/* Basic styling to make it look clean */
-body {
-  font-family: system-ui, -apple-system, sans-serif;
-  background-color: #f4f4f9;
-  color: #333;
-  margin: 0;
-  display: flex;
-  justify-content: center;
-  padding: 2rem;
-}
-
-.poll-container {
-  background: white;
-  padding: 2rem;
-  border-radius: 12px;
-  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
-  width: 100%;
-  max-width: 500px;
-}
-
-header {
-  margin-bottom: 2rem;
-  text-align: center;
-}
-
-h1 { margin: 0 0 0.5rem 0; }
-
-.status {
-  font-size: 0.85rem;
-  color: #666;
-}
-.status .connected { color: #10b981; font-weight: bold; }
-
-.add-option-form {
-  display: flex;
-  gap: 0.5rem;
-  margin-bottom: 2rem;
-}
-
-input {
-  flex-grow: 1;
-  padding: 0.75rem;
-  border: 1px solid #ccc;
-  border-radius: 6px;
-  font-size: 1rem;
-}
-
-button {
-  background: #3b82f6;
-  color: white;
-  border: none;
-  padding: 0.75rem 1rem;
-  border-radius: 6px;
-  cursor: pointer;
-  font-weight: bold;
-  transition: background 0.2s;
-}
-
-button:hover { background: #2563eb; }
-
-.poll-list {
-  list-style: none;
-  padding: 0;
-  margin: 0;
-}
-
-.poll-item {
-  display: flex;
-  justify-content: space-between;
-  align-items: center;
-  padding: 1rem;
-  background: #f8fafc;
-  border: 1px solid #e2e8f0;
-  border-radius: 8px;
-  margin-bottom: 0.5rem;
-}
-
-.option-name { font-weight: 500; }
-.vote-section { display: flex; align-items: center; gap: 1rem; }
-.vote-count { font-size: 0.9rem; color: #475569; }
-.vote-btn { padding: 0.4rem 0.8rem; background: #10b981; }
-.vote-btn:hover { background: #059669; }
-.empty-state { text-align: center; color: #94a3b8; font-style: italic; }
-</style>
-<template>
-  <div class="poll-container">
-    <ClientOnly>
-      <header>
-        <h1>P2P Polling App 🗳️</h1>
-        <div class="status">
-          <span :class="{ 'connected': isConnected }">
-            ● {{ isConnected ? 'Synced' : 'Connecting...' }}
-          </span>
-          <span> | Peers online: {{ connectedPeers }}</span>
-        </div>
-      </header>
-
-      <main>
-        <form @submit.prevent="handleAddNewOption" class="add-option-form">
-          <input 
-            v-model="newOption" 
-            type="text" 
-            placeholder="Enter a new poll option..."
-            required
-          />
-          <button type="submit">Add Option</button>
-        </form>
-
-        <div v-if="Object.keys(pollData).length === 0" class="empty-state">
-          No options yet. Be the first to add one!
-        </div>
-
-        <ul v-else class="poll-list">
-          <li v-for="(votes, optionName) in pollData" :key="optionName" class="poll-item">
-            <span class="option-name">{{ optionName }}</span>
-            <div class="vote-section">
-              <span class="vote-count">{{ votes }} {{ votes === 1 ? 'vote' : 'votes' }}</span>
-              <button @click="vote(String(optionName))" class="vote-btn">+1</button>
-            </div>
-          </li>
-        </ul>
-      </main>
-      <template #fallback>
-        <div class="empty-state">Loading P2P Node...</div>
-      </template>
-    </ClientOnly>
-  </div>
-</template>
-
-<script setup lang="ts">
-import { ref } from 'vue';
-// Manually define 'global' for the browser
-if (process.client) {
-  (window as any).global = window;
-}
-import { usePoll } from '../composables/usePoll';
-
-// Because WebRTC requires the browser environment (window/navigator),
-// we ensure our composable only runs on the client side in Nuxt.
-const newOption = ref('');
-
-// Destructure our P2P logic
-const { pollData, isConnected, connectedPeers, addOption, vote } = usePoll();
-
-const handleAddNewOption = () => {
-  addOption(newOption.value);
-  newOption.value = ''; // Reset input
-};
-</script>

p2p-poll/composables/usePoll.ts

@@ -1,81 +0,0 @@
-// composables/usePoll.ts
-import { ref, onMounted, onUnmounted } from 'vue';
-import * as Y from 'yjs';
-
-export const usePoll = () => {
-  // Reactive Vue state to drive the UI
-  const pollData = ref<Record<string, number>>({});
-  const isConnected = ref(false);
-  const connectedPeers = ref(1); // 1 = just you initially
-
-  let ydoc: Y.Doc;
-  let provider: any;
-  let yMap: Y.Map<number>;
-
-  onMounted(async () => {
-    // 1. Initialize the Yjs document
-    ydoc = new Y.Doc();
-
-    // 2. Connect via WebRTC. 
-    // 'nuxt-p2p-poll-demo-room' is the shared room name.
-    // Anyone using this exact string will sync together.
-    const { WebrtcProvider } = await import('y-webrtc');
-    provider = new WebrtcProvider('nuxt-p2p-poll-demo-room', ydoc);
-
-    // Track connection status
-    provider.on('synced', (arg: {synced: boolean}) => {
-      isConnected.value = arg.synced;
-    });
-
-    provider.on('peers', (data: any) => {
-      // data.webrtcPeers contains the connected peer IDs
-      connectedPeers.value = data.webrtcPeers.length + 1; // +1 for self
-    });
-
-    // 3. Define our shared state structure. We'll use a Map 
-    // where the Key is the Poll Option (string) and Value is the Vote Count (number)
-    yMap = ydoc.getMap<number>('shared-poll');
-
-    // 4. Listen for changes from other peers and update our Vue reactive state
-    yMap.observe(() => {
-      pollData.value = yMap.toJSON();
-    });
-
-    // Initial load in case data already exists in the room
-    pollData.value = yMap.toJSON();
-  });
-
-  onUnmounted(() => {
-    // Clean up when the component is destroyed
-    if (provider) {
-      provider.disconnect();
-    }
-    if (ydoc) {
-      ydoc.destroy();
-    }
-  });
-
-  // Action: Add a new option to the poll
-  const addOption = (optionName: string) => {
-    const trimmedName = optionName.trim();
-    if (trimmedName && !yMap.has(trimmedName)) {
-      yMap.set(trimmedName, 0); // Initialize with 0 votes
-    }
-  };
-
-  // Action: Vote for an existing option
-  const vote = (optionName: string) => {
-    if (yMap.has(optionName)) {
-      const currentVotes = yMap.get(optionName) || 0;
-      yMap.set(optionName, currentVotes + 1);
-    }
-  };
-
-  return {
-    pollData,
-    isConnected,
-    connectedPeers,
-    addOption,
-    vote
-  };
-};

p2p-poll/nuxt.config.ts

@@ -1,11 +0,0 @@
-// https://nuxt.com/docs/api/configuration/nuxt-config
-export default defineNuxtConfig({
-  compatibilityDate: '2025-07-15',
-  devtools: { enabled: true },
-  ssr: false,
-  vite: {
-    optimizeDeps: {
-      include: ['yjs', 'y-webrtc']
-    }
-  }
-})

p2p-poll/package.json

@@ -1,19 +0,0 @@
-{
-  "name": "p2p-poll",
-  "type": "module",
-  "private": true,
-  "scripts": {
-    "build": "nuxt build",
-    "dev": "nuxt dev",
-    "generate": "nuxt generate",
-    "preview": "nuxt preview",
-    "postinstall": "nuxt prepare"
-  },
-  "dependencies": {
-    "nuxt": "^4.1.3",
-    "vue": "^3.5.30",
-    "vue-router": "^5.0.3",
-    "y-webrtc": "^10.3.0",
-    "yjs": "^13.6.30"
-  }
-}

p2p-poll/public/robots.txt

@@ -1,2 +0,0 @@
-User-Agent: *
-Disallow:

p2p-poll/tsconfig.json

@@ -1,18 +0,0 @@
-{
-  // https://nuxt.com/docs/guide/concepts/typescript
-  "files": [],
-  "references": [
-    {
-      "path": "./.nuxt/tsconfig.app.json"
-    },
-    {
-      "path": "./.nuxt/tsconfig.server.json"
-    },
-    {
-      "path": "./.nuxt/tsconfig.shared.json"
-    },
-    {
-      "path": "./.nuxt/tsconfig.node.json"
-    }
-  ]
-}

server/.env.example

@@ -0,0 +1,4 @@
+PORT=3000
+YJS_WS_PORT=1234
+NODE_ENV=development
+CORS_ORIGIN=http://localhost:5173

server/.gitignore

@@ -0,0 +1,5 @@
+node_modules/
+dist/
+.env
+*.log
+.DS_Store

server/package.json

@@ -0,0 +1,36 @@
+{
+  "name": "p2p-poll-server",
+  "version": "1.0.0",
+  "description": "Backend server for P2P polling app with Yjs and WebRTC signaling",
+  "main": "dist/index.js",
+  "scripts": {
+    "dev": "tsx watch src/index.ts",
+    "build": "tsc",
+    "start": "node dist/index.js"
+  },
+  "keywords": [
+    "yjs",
+    "websocket",
+    "webrtc",
+    "p2p"
+  ],
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "cors": "^2.8.5",
+    "dotenv": "^16.3.1",
+    "express": "^4.18.2",
+    "ws": "^8.14.2",
+    "y-websocket": "^1.5.0",
+    "yjs": "^13.6.8",
+    "zod": "^4.3.6"
+  },
+  "devDependencies": {
+    "@types/cors": "^2.8.15",
+    "@types/express": "^4.17.20",
+    "@types/node": "^20.9.0",
+    "@types/ws": "^8.5.8",
+    "tsx": "^4.6.2",
+    "typescript": "^5.2.2"
+  }
+}

server/src/index.ts

@@ -0,0 +1,59 @@
+import express from 'express';
+import http from 'http';
+import cors from 'cors';
+import dotenv from 'dotenv';
+import { createYjsServer } from './yjs-server';
+import { createSignalingServer } from './signaling-server';
+import { logger } from './utils/logger';
+
+dotenv.config();
+
+const app = express();
+const PORT = process.env.PORT || 5000;
+
+app.use(cors({
+  origin: process.env.CORS_ORIGIN || ['http://localhost:5173', 'http://localhost:5174', 'http://localhost:5175'],
+  credentials: true
+}));
+
+app.use(express.json());
+
+app.get('/health', (req, res) => {
+  res.json({ 
+    status: 'ok', 
+    timestamp: new Date().toISOString(),
+    services: {
+      yjs: 'running',
+      signaling: 'running'
+    }
+  });
+});
+
+app.get('/', (req, res) => {
+  res.json({ 
+    message: 'P2P Poll Server',
+    endpoints: {
+      health: '/health',
+      yjs: 'ws://localhost:' + PORT + '/yjs',
+      signaling: 'ws://localhost:' + PORT + '/signal'
+    }
+  });
+});
+
+const server = http.createServer(app);
+
+createYjsServer(server, PORT as number);
+createSignalingServer(server);
+
+server.listen(PORT, () => {
+  logger.info(`Server running on port ${PORT}`);
+  logger.info(`Yjs WebSocket: ws://localhost:${PORT}/yjs`);
+  logger.info(`Signaling WebSocket: ws://localhost:${PORT}/signal`);
+});
+
+process.on('SIGTERM', () => {
+  logger.info('SIGTERM signal received: closing HTTP server');
+  server.close(() => {
+    logger.info('HTTP server closed');
+  });
+});

server/src/signaling-server.ts

@@ -0,0 +1,305 @@
+import { WebSocketServer, WebSocket } from 'ws';
+import http from 'http';
+import { SignalingMessage, SignalingMessageSchema } from './types/poll.types';
+import { logger } from './utils/logger';
+
+interface Client {
+  id: string;
+  ws: WebSocket;
+  roomId: string;
+  lastSeen: number;
+  messageCount: number;
+  lastMessageTime: number;
+}
+
+export function createSignalingServer(server: http.Server) {
+  const wss = new WebSocketServer({ 
+    noServer: true
+  });
+
+  // Handle upgrade requests for /signal path
+  server.on('upgrade', (request, socket, head) => {
+    const pathname = request.url || '';
+    
+    if (pathname === '/signal' || pathname.startsWith('/signal?')) {
+      logger.info(`[SIGNALING] Upgrade request for path: ${pathname}`);
+      wss.handleUpgrade(request, socket, head, (ws) => {
+        wss.emit('connection', ws, request);
+      });
+    }
+  });
+
+  const clients = new Map<string, Client>();
+  const rooms = new Map<string, Set<string>>();
+  const roomPasswords = new Map<string, string>();
+  const HEARTBEAT_INTERVAL = 30000;
+  const CLIENT_TIMEOUT = 60000;
+  const RATE_LIMIT_WINDOW = 1000;
+  const RATE_LIMIT_MAX = 10;
+
+  const heartbeatInterval = setInterval(() => {
+    const now = Date.now();
+    clients.forEach((client, clientId) => {
+      if (now - client.lastSeen > CLIENT_TIMEOUT) {
+        logger.info(`Client ${clientId} timed out, removing...`);
+        handleClientLeave(clientId);
+      } else {
+        client.ws.send(JSON.stringify({ type: 'ping' }));
+      }
+    });
+  }, HEARTBEAT_INTERVAL);
+
+  wss.on('connection', (ws: WebSocket) => {
+    let clientId: string | null = null;
+    const tempClientId = `temp-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
+    logger.info(`[SIGNALING] New WebSocket connection (temp: ${tempClientId})`);
+
+    ws.on('message', (data: Buffer) => {
+      try {
+        const parsed = JSON.parse(data.toString());
+        const validationResult = SignalingMessageSchema.safeParse(parsed);
+        
+        if (!validationResult.success) {
+          logger.error('Invalid signaling message:', validationResult.error);
+          ws.send(JSON.stringify({ 
+            type: 'error', 
+            message: 'Invalid message format',
+            errors: validationResult.error.issues 
+          }));
+          return;
+        }
+        
+        const message: SignalingMessage = validationResult.data;
+
+        if (clientId) {
+          const client = clients.get(clientId);
+          if (client) {
+            const now = Date.now();
+            if (now - client.lastMessageTime < RATE_LIMIT_WINDOW) {
+              client.messageCount++;
+              if (client.messageCount > RATE_LIMIT_MAX) {
+                logger.warn(`Client ${clientId} exceeded rate limit`);
+                ws.send(JSON.stringify({ 
+                  type: 'error', 
+                  message: 'Rate limit exceeded' 
+                }));
+                return;
+              }
+            } else {
+              client.messageCount = 1;
+              client.lastMessageTime = now;
+            }
+          }
+        }
+
+        switch (message.type) {
+          case 'subscribe':
+            // y-webrtc subscribe message - client wants to join topics
+            if (message.topics) {
+              message.topics.forEach((topic: string) => {
+                if (!rooms.has(topic)) {
+                  rooms.set(topic, new Set());
+                }
+                const tempId = `sub-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
+                clientId = tempId;
+                rooms.get(topic)!.add(tempId);
+                clients.set(tempId, {
+                  id: tempId,
+                  ws,
+                  roomId: topic,
+                  lastSeen: Date.now(),
+                  messageCount: 0,
+                  lastMessageTime: Date.now()
+                });
+                logger.info(`[SIGNALING] Client subscribed to topic: ${topic}`);
+              });
+            }
+            break;
+
+          case 'unsubscribe':
+            // y-webrtc unsubscribe message
+            if (message.topics && clientId) {
+              message.topics.forEach((topic: string) => {
+                const room = rooms.get(topic);
+                if (room && clientId) {
+                  room.delete(clientId);
+                  if (room.size === 0) {
+                    rooms.delete(topic);
+                  }
+                }
+              });
+            }
+            break;
+
+          case 'publish':
+            // y-webrtc publish message - broadcast to all subscribers of a topic
+            if (message.topic) {
+              const topic = message.topic;
+              const room = rooms.get(topic);
+              if (room) {
+                room.forEach((subscriberId) => {
+                  const subscriber = clients.get(subscriberId);
+                  if (subscriber && subscriber.ws !== ws && subscriber.ws.readyState === WebSocket.OPEN) {
+                    subscriber.ws.send(JSON.stringify({
+                      type: 'publish',
+                      topic: topic,
+                      data: message.data
+                    }));
+                  }
+                });
+              }
+            }
+            break;
+
+          case 'join':
+            clientId = message.from || `client-${Date.now()}`;
+            const roomId = message.roomId || 'default-room';
+            
+            const roomPassword = roomPasswords.get(roomId);
+            if (roomPassword && message.password !== roomPassword) {
+              logger.warn(`Client ${clientId} failed password authentication for room ${roomId}`);
+              ws.send(JSON.stringify({ 
+                type: 'error', 
+                message: 'Invalid room password' 
+              }));
+              return;
+            }
+            
+            clients.set(clientId, { 
+              id: clientId, 
+              ws, 
+              roomId, 
+              lastSeen: Date.now(),
+              messageCount: 0,
+              lastMessageTime: Date.now()
+            });
+            
+            if (!rooms.has(roomId)) {
+              rooms.set(roomId, new Set());
+            }
+            rooms.get(roomId)!.add(clientId);
+
+            logger.info(`Client ${clientId} joined room ${roomId}`);
+
+            const roomClients = Array.from(rooms.get(roomId)!).filter(id => id !== clientId);
+            ws.send(JSON.stringify({
+              type: 'peers',
+              peers: roomClients
+            }));
+
+            roomClients.forEach(peerId => {
+              const peer = clients.get(peerId);
+              if (peer && peer.ws.readyState === WebSocket.OPEN) {
+                peer.ws.send(JSON.stringify({
+                  type: 'peer-joined',
+                  peerId: clientId
+                }));
+              }
+            });
+            break;
+
+          case 'offer':
+          case 'answer':
+          case 'ice-candidate':
+            if (message.to) {
+              const targetClient = clients.get(message.to);
+              if (targetClient && targetClient.ws.readyState === WebSocket.OPEN) {
+                targetClient.ws.send(JSON.stringify({
+                  type: message.type,
+                  from: message.from,
+                  data: message.data
+                }));
+              }
+            }
+            break;
+
+          case 'leave':
+            if (message.from) {
+              handleClientLeave(message.from);
+            }
+            break;
+
+          case 'create-room':
+            if (message.roomId && message.password) {
+              roomPasswords.set(message.roomId, message.password);
+              logger.info(`Room ${message.roomId} created with password protection`);
+              ws.send(JSON.stringify({ 
+                type: 'room-created', 
+                roomId: message.roomId 
+              }));
+            }
+            break;
+
+          case 'ping':
+            if (clientId) {
+              const client = clients.get(clientId);
+              if (client) {
+                client.lastSeen = Date.now();
+                client.ws.send(JSON.stringify({ type: 'pong', from: 'server' }));
+              }
+            }
+            break;
+
+          case 'pong':
+            if (clientId) {
+              const client = clients.get(clientId);
+              if (client) {
+                client.lastSeen = Date.now();
+              }
+            }
+            break;
+        }
+      } catch (error) {
+        logger.error('Error processing signaling message:', error);
+      }
+    });
+
+    ws.on('close', () => {
+      if (clientId) {
+        handleClientLeave(clientId);
+      }
+    });
+
+    ws.on('error', (error) => {
+      logger.error('WebSocket error:', error);
+    });
+  });
+
+  function handleClientLeave(clientId: string) {
+    const client = clients.get(clientId);
+    if (client) {
+      const roomId = client.roomId;
+      const room = rooms.get(roomId);
+      
+      if (room) {
+        room.delete(clientId);
+        
+        room.forEach(peerId => {
+          const peer = clients.get(peerId);
+          if (peer && peer.ws.readyState === WebSocket.OPEN) {
+            peer.ws.send(JSON.stringify({
+              type: 'peer-left',
+              peerId: clientId
+            }));
+          }
+        });
+
+        if (room.size === 0) {
+          rooms.delete(roomId);
+        }
+      }
+      
+      clients.delete(clientId);
+      logger.info(`Client ${clientId} left room ${roomId}`);
+    }
+  }
+
+  wss.on('close', () => {
+    clearInterval(heartbeatInterval);
+    logger.info('Signaling server closed');
+  });
+
+  logger.info('Signaling server running at path /signal');
+  
+  return wss;
+}

server/src/types/poll.types.ts

@@ -0,0 +1,40 @@
+import { z } from 'zod';
+
+export interface PollOption {
+  id: string;
+  text: string;
+  votes: number;
+  votedBy: string[];
+  createdBy: string;
+  timestamp: number;
+}
+
+export interface Poll {
+  id: string;
+  question: string;
+  createdBy: string;
+  timestamp: number;
+  options: PollOption[];
+}
+
+export const SignalingMessageSchema = z.object({
+  type: z.enum(['offer', 'answer', 'ice-candidate', 'join', 'leave', 'ping', 'pong', 'create-room', 'subscribe', 'unsubscribe', 'publish', 'signal']),
+  from: z.string().optional(),
+  to: z.string().optional(),
+  data: z.any().optional(),
+  roomId: z.string().optional(),
+  password: z.string().optional(),
+  topics: z.array(z.string()).optional(),
+  topic: z.string().optional()
+});
+
+export interface SignalingMessage {
+  type: 'offer' | 'answer' | 'ice-candidate' | 'join' | 'leave' | 'ping' | 'pong' | 'create-room' | 'subscribe' | 'unsubscribe' | 'publish' | 'signal';
+  from?: string;
+  to?: string;
+  data?: any;
+  roomId?: string;
+  password?: string;
+  topics?: string[];
+  topic?: string;
+}

server/src/utils/logger.ts

@@ -0,0 +1,115 @@
+type LogLevel = 'info' | 'error' | 'warn' | 'debug';
+type LogContext = Record<string, any>;
+
+interface LogEntry {
+  timestamp: string;
+  level: LogLevel;
+  message: string;
+  context?: LogContext;
+}
+
+class Logger {
+  private context: LogContext = {};
+  private timers: Map<string, number> = new Map();
+
+  setContext(ctx: LogContext): void {
+    this.context = { ...this.context, ...ctx };
+  }
+
+  clearContext(): void {
+    this.context = {};
+  }
+
+  private formatLog(level: LogLevel, message: string, args: any[]): LogEntry {
+    const entry: LogEntry = {
+      timestamp: new Date().toISOString(),
+      level,
+      message,
+      context: Object.keys(this.context).length > 0 ? { ...this.context } : undefined
+    };
+
+    if (args.length > 0) {
+      if (entry.context) {
+        entry.context.args = args;
+      } else {
+        entry.context = { args };
+      }
+    }
+
+    return entry;
+  }
+
+  private log(level: LogLevel, message: string, ...args: any[]): void {
+    const entry = this.formatLog(level, message, args);
+    const logString = JSON.stringify(entry);
+    
+    switch (level) {
+      case 'info':
+        console.log(logString);
+        break;
+      case 'error':
+        console.error(logString);
+        break;
+      case 'warn':
+        console.warn(logString);
+        break;
+      case 'debug':
+        if (process.env.NODE_ENV === 'development') {
+          console.debug(logString);
+        }
+        break;
+    }
+  }
+
+  info(message: string, ...args: any[]): void {
+    this.log('info', message, ...args);
+  }
+
+  error(message: string, ...args: any[]): void {
+    this.log('error', message, ...args);
+  }
+
+  warn(message: string, ...args: any[]): void {
+    this.log('warn', message, ...args);
+  }
+
+  debug(message: string, ...args: any[]): void {
+    this.log('debug', message, ...args);
+  }
+
+  startTimer(label: string): void {
+    this.timers.set(label, Date.now());
+  }
+
+  endTimer(label: string): number {
+    const startTime = this.timers.get(label);
+    if (!startTime) {
+      this.warn(`Timer '${label}' not found`);
+      return 0;
+    }
+    const duration = Date.now() - startTime;
+    this.timers.delete(label);
+    this.debug(`Timer '${label}': ${duration}ms`);
+    return duration;
+  }
+
+  time<T>(label: string, fn: () => T): T {
+    this.startTimer(label);
+    try {
+      return fn();
+    } finally {
+      this.endTimer(label);
+    }
+  }
+
+  async timeAsync<T>(label: string, fn: () => Promise<T>): Promise<T> {
+    this.startTimer(label);
+    try {
+      return await fn();
+    } finally {
+      this.endTimer(label);
+    }
+  }
+}
+
+export const logger = new Logger();

server/src/yjs-server.ts

@@ -0,0 +1,51 @@
+import { WebSocketServer } from 'ws';
+// @ts-ignore
+import { setupWSConnection } from 'y-websocket/bin/utils';
+import http from 'http';
+import { logger } from './utils/logger';
+
+export function createYjsServer(server: http.Server, port: number) {
+  const wss = new WebSocketServer({ 
+    noServer: true
+  });
+
+  // Handle upgrade requests for /yjs/* paths
+  server.on('upgrade', (request, socket, head) => {
+    const pathname = request.url || '';
+    
+    if (pathname.startsWith('/yjs')) {
+      logger.info(`[YJS] Upgrade request for path: ${pathname}`);
+      wss.handleUpgrade(request, socket, head, (ws) => {
+        wss.emit('connection', ws, request);
+      });
+    }
+  });
+
+  wss.on('connection', (ws, req) => {
+    const url = req.url || 'unknown';
+    const remoteAddress = req.socket.remoteAddress || 'unknown';
+    logger.info(`[YJS] New connection from ${remoteAddress}, URL: ${url}`);
+    
+    // Log when connection closes
+    ws.on('close', () => {
+      logger.info(`[YJS] Connection closed from ${remoteAddress}`);
+    });
+    
+    ws.on('error', (error) => {
+      logger.error(`[YJS] Connection error from ${remoteAddress}:`, error);
+    });
+    
+    // y-websocket automatically handles docName from the URL path
+    // The room name is passed as part of the URL: /yjs/room-name
+    // We don't need to manually extract it
+    setupWSConnection(ws, req, { gc: true });
+  });
+
+  wss.on('error', (error) => {
+    logger.error('Yjs WebSocket server error:', error);
+  });
+
+  logger.info(`Yjs WebSocket server running on port ${port} at path /yjs`);
+  
+  return wss;
+}

server/tsconfig.json

@@ -0,0 +1,20 @@
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "module": "commonjs",
+    "lib": ["ES2020"],
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "moduleResolution": "node",
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}