Not the interesting part

1. Backend (Node.js + WebSocket)

This backend code sets up a WebSocket server for real-time messaging using Node.js.

const WebSocket = require('ws'); const server = new WebSocket.Server({ port: 8080 });

let clients = [];

server.on('connection', (ws) => { clients.push(ws); console.log('New user connected.');

ws.on('message', (message) => {
    console.log(`Received: ${message}`);
    
    // Broadcast message to all clients
    clients.forEach(client => {
        if (client !== ws && client.readyState === WebSocket.OPEN) {
            client.send(message);
        }
    });
});

ws.on('close', () => {
    clients = clients.filter(client => client !== ws);
    console.log('User disconnected.');
});

});

console.log('WebSocket server is running on ws://localhost:8080');

1. Frontend (React.js + WebSocket Client)

This React client connects to the WebSocket server and allows users to send and receive messages in real-time.

import React, { useState, useEffect } from 'react';

const Chat = () => { const [messages, setMessages] = useState([]); const [message, setMessage] = useState(''); let ws;

useEffect(() => {
    ws = new WebSocket('ws://localhost:8080');

    ws.onmessage = (event) => {
        setMessages(prevMessages => [...prevMessages, event.data]);
    };

    return () => {
        ws.close();
    };
}, []);

const sendMessage = () => {
    if (ws && message) {
        ws.send(message);
        setMessage('');
    }
};

return (
    <div>
        <div>
            {messages.map((msg, index) => (
                <div key={index}>{msg}</div>
            ))}
        </div>
        <input 
            type="text" 
            value={message} 
            onChange={(e) => setMessage(e.target.value)} 
        />
        <button onClick={sendMessage}>Send</button>
    </div>
);

};

export default Chat;

1. Web3 Integration (Smart Contract on Solidity)

A simple smart contract to manage messages or tokens on the blockchain.

// SPDX-License-Identifier: MIT pragma solidity ^0.8.0;

contract YoChat { struct Message { address sender; string content; uint timestamp; }

Message[] public messages;

event NewMessage(address indexed sender, string content, uint timestamp);

function sendMessage(string memory _content) public {
    messages.push(Message(msg.sender, _content, block.timestamp));
    emit NewMessage(msg.sender, _content, block.timestamp);
}

function getMessages() public view returns (Message[] memory) {
    return messages;
}

}

1. AI Integration (Backend with Node.js and OpenAI API)

AI integration for note-taking, using OpenAI API to summarize messages into key notes.

const express = require('express'); const { Configuration, OpenAIApi } = require('openai'); const app = express(); app.use(express.json());

const configuration = new Configuration({ apiKey: 'your-openai-api-key', }); const openai = new OpenAIApi(configuration);

app.post('/generate-notes', async (req, res) => { const { messages } = req.body;

try {
    const response = await openai.createCompletion({
        model: "text-davinci-003",
        prompt: `Summarize these messages into key points:\n${messages}`,
        max_tokens: 150,
    });

    res.json({ notes: response.data.choices[0].text });
} catch (error) {
    res.status(500).send('Error generating notes');
}

});

app.listen(3000, () => console.log('Server running on http://localhost:3000'));

1. React Client for AI-Powered Notes

A React component that allows users to input messages and generate AI-powered notes.

import React, { useState } from 'react';

const AINotes = () => { const [messages, setMessages] = useState(''); const [notes, setNotes] = useState('');

const generateNotes = async () => {const response = await fetch('http://localhost:3000/generate-notes', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ messages }),
        });
        
        const data = await response.json();
        setNotes(data.notes);
    };

    return (
        <div>
            <textarea 
                value={messages} 
                onChange={(e) => setMessages(e.target.value)} 
                placeholder="Paste your chat messages here"
            />
            <button onClick={generateNotes}>Generate Notes</button>
            <div>
                <h3>Generated Notes:</h3>
                <p>{notes}</p>
            </div>
        </div>
    );
};

export default AINotes;

1. Web3 Connection (React + Ethers.js)

React component to connect and interact with the blockchain smart contract using Ethers.js.

import { useEffect, useState } from 'react'; import { ethers } from 'ethers'; import YoChatABI from './YoChatABI.json'; // ABI of the smart contract

const YoChatContractAddress = "your-contract-address";

const Web3Chat = () => { const [messages, setMessages] = useState([]); const [message, setMessage] = useState(''); const [provider, setProvider] = useState(null); const [signer, setSigner] = useState(null); const [contract, setContract] = useState(null);

useEffect(() => {
    const connectToBlockchain = async () => {
        const _provider = new ethers.providers.Web3Provider(window.ethereum);
        const _signer = _provider.getSigner();
        const _contract = new ethers.Contract(YoChatContractAddress, YoChatABI, _signer);
        setProvider(_provider);
        setSigner(_signer);
        setContract(_contract);

        const _messages = await _contract.getMessages();
        setMessages(_messages);
    };

    connectToBlockchain();
}, []);

const sendMessage = async () => {
    await contract.sendMessage(message);
    setMessage('');
};

return (
    <div>
        <div>
            {messages.map((msg, index) => (
                <div key={index}>
                    {msg.content} from {msg.sender}
                </div>
            ))}
        </div>
        <input
            type="text"
            value={message}
            onChange={(e) => setMessage(e.target.value)}
        />
        <button onClick={sendMessage}>Send to Blockchain</button>
    </div>
);

};

export default Web3Chat;

Conclusion

This is a basic structure for Yo.Chat, which integrates real-time messaging, Web3 blockchain features, and AI-powered notes. The system can be further expanded to include security features (e.g., end-to-end encryption), improved AI tools, and support for cross-platform usage (Web, mobile apps).