LinkUp-P2P-Chat/app.js

290 lines
8.2 KiB
JavaScript
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import Hyperswarm from 'hyperswarm';
import crypto from 'hypercore-crypto';
import b4a from 'b4a';
import ServeDrive from 'serve-drive';
import Localdrive from 'localdrive';
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import fs from 'fs';
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import Hyperdrive from 'hyperdrive';
import Corestore from 'corestore';
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const store = new Corestore('./storage');
const drive = new Hyperdrive(store);
await drive.ready();
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let swarm;
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let userName = 'Anonymous';
let userAvatar = '';
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let registeredUsers = JSON.parse(localStorage.getItem('registeredUsers')) || {};
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let peerCount = 0;
let currentRoom = null;
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async function initialize() {
swarm = new Hyperswarm();
const servePort = 1337;
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const serve = new ServeDrive({ port: servePort, get: ({ key, filename, version }) => drive });
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await serve.ready();
console.log('Listening on http://localhost:' + serve.address().port);
const registerForm = document.querySelector('#register-form');
const selectAvatarButton = document.querySelector('#select-avatar');
const createChatRoomButton = document.querySelector('#create-chat-room');
const joinChatRoomButton = document.querySelector('#join-chat-room');
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const messageForm = document.querySelector('#message-form');
const toggleSetupBtn = document.querySelector('#toggle-setup-btn');
const removeRoomBtn = document.querySelector('#remove-room-btn');
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if (registerForm) {
registerForm.addEventListener('submit', registerUser);
}
if (selectAvatarButton) {
selectAvatarButton.addEventListener('click', () => {
document.querySelector('#avatar-file').click();
});
}
if (createChatRoomButton) {
createChatRoomButton.addEventListener('click', createChatRoom);
}
if (joinChatRoomButton) {
joinChatRoomButton.addEventListener('click', joinChatRoom);
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}
if (messageForm) {
messageForm.addEventListener('submit', sendMessage);
}
if (toggleSetupBtn) {
toggleSetupBtn.addEventListener('click', toggleSetupView);
}
if (removeRoomBtn) {
removeRoomBtn.addEventListener('click', leaveRoom);
}
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const registerDiv = document.querySelector('#register');
if (registerDiv) {
registerDiv.classList.remove('hidden');
}
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swarm.on('connection', async (connection, info) => {
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peerCount++;
updatePeerCount();
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const iconBuffer = await drive.get(`/icons/${userName}.png`);
if (iconBuffer) {
const iconMessage = JSON.stringify({
type: 'icon',
username: userName,
avatar: iconBuffer.toString('base64'),
});
connection.write(iconMessage);
}
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connection.on('data', async (data) => {
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const messageObj = JSON.parse(data.toString());
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if (messageObj.type === 'icon') {
const username = messageObj.username;
const avatarBuffer = Buffer.from(messageObj.avatar, 'base64');
await drive.put(`/icons/${username}.png`, avatarBuffer);
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updateIcon(username, avatarBuffer);
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} else {
onMessageAdded(messageObj.name, messageObj.message, messageObj.avatar);
}
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});
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connection.on('close', () => {
peerCount--;
updatePeerCount();
});
});
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swarm.on('error', (err) => {
console.error('Swarm error:', err);
});
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swarm.on('close', () => {
console.log('Swarm closed');
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});
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}
function registerUser(e) {
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e.preventDefault();
const regUsername = document.querySelector('#reg-username').value;
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if (registeredUsers[regUsername]) {
alert('Username already taken. Please choose another.');
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return;
}
const avatarFile = document.querySelector('#avatar-file').files[0];
if (avatarFile) {
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const reader = new FileReader();
reader.onload = (event) => {
const buffer = new Uint8Array(event.target.result);
drive.put(`/icons/${regUsername}.png`, buffer);
userAvatar = URL.createObjectURL(new Blob([buffer]));
registeredUsers[regUsername] = userAvatar;
localStorage.setItem('registeredUsers', JSON.stringify(registeredUsers));
continueRegistration(regUsername);
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};
reader.readAsArrayBuffer(avatarFile);
} else {
continueRegistration(regUsername);
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}
}
async function continueRegistration(regUsername) {
const loadingDiv = document.querySelector('#loading');
const setupDiv = document.querySelector('#setup');
if (!regUsername) {
alert('Please enter a username.');
return;
}
userName = regUsername;
setupDiv.classList.remove('hidden');
document.querySelector('#register').classList.add('hidden');
loadingDiv.classList.add('hidden');
const randomTopic = crypto.randomBytes(32);
document.querySelector('#chat-room-topic').innerText = truncateHash(b4a.toString(randomTopic, 'hex'));
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}
async function createChatRoom() {
const topicBuffer = crypto.randomBytes(32);
const topic = b4a.toString(topicBuffer, 'hex');
addRoomToList(topic);
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joinSwarm(topicBuffer);
}
async function joinChatRoom(e) {
e.preventDefault();
const topicStr = document.querySelector('#join-chat-room-topic').value;
const topicBuffer = b4a.from(topicStr, 'hex');
addRoomToList(topicStr);
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joinSwarm(topicBuffer);
}
async function joinSwarm(topicBuffer) {
if (currentRoom) {
currentRoom.destroy();
}
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document.querySelector('#setup').classList.add('hidden');
document.querySelector('#loading').classList.remove('hidden');
const discovery = swarm.join(topicBuffer, { client: true, server: true });
await discovery.flushed();
const topic = b4a.toString(topicBuffer, 'hex');
document.querySelector('#chat-room-topic').innerText = truncateHash(topic);
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document.querySelector('#loading').classList.add('hidden');
document.querySelector('#chat').classList.remove('hidden');
currentRoom = discovery;
clearMessages();
}
function addRoomToList(topic) {
const roomList = document.querySelector('#room-list');
const roomItem = document.createElement('li');
roomItem.textContent = truncateHash(topic);
roomItem.dataset.topic = topic;
roomItem.addEventListener('click', () => switchRoom(topic));
roomList.appendChild(roomItem);
}
function switchRoom(topic) {
const topicBuffer = b4a.from(topic, 'hex');
joinSwarm(topicBuffer);
}
function leaveRoom() {
if (currentRoom) {
currentRoom.destroy();
currentRoom = null;
}
document.querySelector('#chat').classList.add('hidden');
document.querySelector('#setup').classList.remove('hidden');
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}
function sendMessage(e) {
e.preventDefault();
const message = document.querySelector('#message').value;
document.querySelector('#message').value = '';
onMessageAdded(userName, message, userAvatar);
const messageObj = JSON.stringify({
type: 'message',
name: userName,
message,
avatar: userAvatar,
timestamp: Date.now(),
});
const peers = [...swarm.connections];
for (const peer of peers) {
peer.write(messageObj);
}
}
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function scrollToBottom() {
var container = document.getElementById("messages-container");
container.scrollTop = container.scrollHeight;
}
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function onMessageAdded(from, message, avatar) {
const $div = document.createElement('div');
$div.classList.add('message');
const $img = document.createElement('img');
$img.src = avatar || 'https://via.placeholder.com/40';
$div.appendChild($img);
const $content = document.createElement('div');
$content.classList.add('message-content');
const $header = document.createElement('div');
$header.classList.add('message-header');
$header.textContent = from;
const $text = document.createElement('div');
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$text.classList.add('message-text');
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const md = window.markdownit();
const markdownContent = md.render(message);
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$text.innerHTML = markdownContent;
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$content.appendChild($header);
$content.appendChild($text);
$div.appendChild($content);
document.querySelector('#messages').appendChild($div);
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scrollToBottom();
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}
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function truncateHash(hash) {
return `${hash.slice(0, 6)}...${hash.slice(-6)}`;
}
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async function updateIcon(username, avatarBuffer) {
const userIcon = document.querySelector(`img[src*="${username}.png"]`);
if (userIcon) {
userIcon.src = URL.createObjectURL(new Blob([avatarBuffer]));
}
}
function clearMessages() {
const messagesContainer = document.querySelector('#messages');
while (messagesContainer.firstChild) {
messagesContainer.removeChild(messagesContainer.firstChild);
}
}
function toggleSetupView() {
const setupDiv = document.querySelector('#setup');
setupDiv.classList.toggle('hidden');
}
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initialize();