Compare commits
1 Commits
proposal-e
...
feat/p2p-p
| Author | SHA1 | Date | |
|---|---|---|---|
|
a621cc4483 |
1
.gitignore
vendored
1
.gitignore
vendored
@@ -1 +0,0 @@
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||||
node_modules/
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27
README.md
27
README.md
@@ -1,28 +1 @@
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# P2P Poll App
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## Install npm packages
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```
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npm init -y
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npm install
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```
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Note: the frontend obtains the packages `yjs` and `y-websocket` dynamically.
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## Run backend
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```
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node backend.js
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```
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### Note on Yjs suggestion
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Note that the following server setup is suggested in the Yjs docs (https://docs.yjs.dev/ecosystem/connection-provider/y-websocket):
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```
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npm install y-websocket-server
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HOST=localhost PORT=1000 npx y-websocket
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```
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However, across a range of npm versions, this does not work.
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Nevertheless, the essential code from the `y-websocket-server` package is used here as provided in `utils.js`.
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## Run frontend
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Open "frontend.html" in browser.
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31
backend.js
31
backend.js
@@ -1,31 +0,0 @@
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import { WebSocketServer } from 'ws';
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import { setupWSConnection } from './utils.js'
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// Create a WebSocket server
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const WS_PORT = 8080;
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const wss = new WebSocketServer({ port: WS_PORT });
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console.log('WebSocket server is running on ws://localhost:' + String(WS_PORT));
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|
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// Connection event handler
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wss.on('connection', setupWSConnection);
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/*
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wss.on('connection', (ws) => {
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console.log('Client connected');
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// Message event handler
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ws.on('message', (message) => {
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let msg_str = String(message);
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console.log("Received: " + msg_str);
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|
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// If this is a text or state message (no Yjs logic) - echo the message back to the client
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if (msg_str.startsWith("TEXT_MESSAGE") | msg_str.startsWith("STATE_MESSAGE")) {
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ws.send(msg_str);
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}
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});
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// Close event handler
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ws.on('close', () => {
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console.log('Client disconnected');
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});
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});*/
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196
frontend.html
196
frontend.html
@@ -1,196 +0,0 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>Poll Client</title>
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<style>
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body {
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font-family: Arial, sans-serif;
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max-width: 600px;
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margin: 0 auto;
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padding: 20px;
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}
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#messages {
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height: 300px;
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border: 1px solid #ccc;
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overflow-y: auto;
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padding: 10px;
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margin-bottom: 10px;
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}
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.message { margin: 5px 0; }
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</style>
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</head>
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<body>
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<h1>Poll Client</h1>
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<div id="status">Connecting to server...</div>
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<div id="status2">Connecting to server...</div>
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<div id="messages"></div>
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<div>
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<input type="text" id="messageInput" placeholder="Type your message">
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<!--button onclick="sendMessage()">Send</button-->
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<button id="sendBtn">Send</button>
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<input id="optionInput" placeholder="Add option">
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<button id="addBtn">Add</button>
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<ul id="options"></ul>
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</div>
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<script type="module">
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import * as Y from "https://esm.sh/yjs"
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import { WebsocketProvider } from "https://esm.sh/y-websocket"
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const WS_PORT = 8080;
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const ydoc = new Y.Doc();
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const status = document.getElementById('status');
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const status2 = document.getElementById('status2');
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const messages = document.getElementById('messages');
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const messageInput = document.getElementById('messageInput');
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// Connect to the backend (WebSocket server) via Yjs WebsocketProvider
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const wsp = new WebsocketProvider(
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'ws://localhost:' + String(WS_PORT), 'poll-room',
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ydoc
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)
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wsp.on('status', event => {
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//console.log("event.status =", event.status)
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if (event.status == "connected") {
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status.textContent = 'Yjs connected to WebSocket server';
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status.style.color = 'green';
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}
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else {
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status.textContent = 'Yjs disonnected from WebSocket server';
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status.style.color = 'red';
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}
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})
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wsp.onopen = () => {
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console.log('connected to y-websocket server');
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};
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ydoc.on('update', () => {
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console.log('Yjs document updated locally');
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});
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wsp.on('sync', isSynced => {
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console.log("isSynced =", isSynced)
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})
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// Connect to the backend (WebSocket server) via common WebSocket (only for informative messages)
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const ws = new WebSocket('ws://localhost:' + String(WS_PORT));
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ws.onopen = () => {
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status2.textContent = 'WebSocket client connected to WebSocket server';
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status2.style.color = 'green';
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};
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ws.onmessage = (event) => {
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const message = document.createElement('div');
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message.className = 'message';
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message.textContent = event.data;
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messages.appendChild(message);
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messages.scrollTop = messages.scrollHeight;
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};
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ws.onerror = (error) => {
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status2.textContent = 'Error: ' + error.message;
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status2.style.color = 'red';
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};
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ws.onclose = () => {
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status2.textContent = 'WebSocket client disconnected from WebSocket server';
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status2.style.color = 'red';
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};
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// Function to send a message
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function sendMessage(command, payload) {
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let message = "";
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if (command === "TEXT_MESSAGE") {
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message = command + ":" + messageInput.value.trim();
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messageInput.value = "";
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}
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else if (command.startsWith("STATE_MESSAGE--")) {
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message = command + ":" + payload;
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}
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else {
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console.log("Error: unknown command '" + command + "'")
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}
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if (message) {
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/* To make compatible with y-websocket-server API:
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const encoder = encoding.createEncoder()
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encoding.writeVarUint(encoder, messageTextMessage)
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syncProtocol.writeUpdate(encoder, update)
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enc_message = encoding.toUint8Array(encoder)*/
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ws.send(message);
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}
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}
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// Send message on button click
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document.getElementById("sendBtn").onclick = () => {
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sendMessage("TEXT_MESSAGE", "");
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};
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// Send message on Enter key
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messageInput.addEventListener('keypress', (e) => {
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if (e.key === 'Enter') {
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sendMessage("TEXT_MESSAGE", "");
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}
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});
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// Actual poll logic
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const optionsMap = ydoc.getMap("options");
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const optionsList = document.getElementById("options");
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const input = document.getElementById("optionInput");
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function render() {
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optionsList.innerHTML = ""
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optionsMap.forEach((vote, name) => {
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// List element for this option
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const li = document.createElement("li")
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// Label for this option
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const label = document.createElement("span")
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label.textContent = name + " — " + vote + " "
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// "Vote"/"Unvote" button
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const voteBtn = document.createElement("button")
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if (vote == false) {
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voteBtn.textContent = "Vote"
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||||
}
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else {
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voteBtn.textContent = "Unvote"
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}
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voteBtn.onclick = () => {
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vote = !vote;
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optionsMap.set(name, vote);
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sendMessage("STATE_MESSAGE--" + (vote ? "VOTE" : "UNVOTE"), name);
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}
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// "Remove" button
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const removeBtn = document.createElement("button")
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removeBtn.textContent = "Remove"
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removeBtn.onclick = () => {
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optionsMap.delete(name);
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sendMessage("STATE_MESSAGE--REMOVE", name);
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||||
}
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li.appendChild(label)
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li.appendChild(voteBtn)
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li.appendChild(removeBtn)
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optionsList.appendChild(li)
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})
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};
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||||
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||||
document.getElementById("addBtn").onclick = () => {
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const name = input.value.trim()
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|
||||
if (!name) return
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if (!optionsMap.has(name)) {
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optionsMap.set(name, false);
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sendMessage("STATE_MESSAGE--ADD_OPTION", name);
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||||
}
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||||
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input.value = ""
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};
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optionsMap.observe(render);
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||||
|
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render();
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||||
</script>
|
||||
</body>
|
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</html>
|
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33
index.html
Normal file
33
index.html
Normal file
@@ -0,0 +1,33 @@
|
||||
<!DOCTYPE html>
|
||||
<html lang="en">
|
||||
<head>
|
||||
<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||||
<title>P2P Poll</title>
|
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<link rel="stylesheet" href="/src/style.css">
|
||||
</head>
|
||||
<body>
|
||||
<div id="app">
|
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<header>
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||||
<h1>P2P Poll</h1>
|
||||
<div id="status">
|
||||
<span id="connection-status" class="connecting">Connecting...</span>
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||||
<span id="peer-count">1 peer</span>
|
||||
</div>
|
||||
</header>
|
||||
|
||||
<main>
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||||
<div id="add-option">
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||||
<input type="text" id="option-input" placeholder="Add a poll option..." maxlength="100">
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||||
<button id="add-btn">Add</button>
|
||||
</div>
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||||
|
||||
<div id="poll-options"></div>
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||||
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||||
<p id="empty-state">No options yet. Add one above!</p>
|
||||
</main>
|
||||
</div>
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||||
|
||||
<script type="module" src="/src/main.js"></script>
|
||||
</body>
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||||
</html>
|
||||
1397
package-lock.json
generated
1397
package-lock.json
generated
File diff suppressed because it is too large
Load Diff
22
package.json
22
package.json
@@ -1,20 +1,18 @@
|
||||
{
|
||||
"name": "yjs-poll",
|
||||
"name": "p2p-poll",
|
||||
"private": true,
|
||||
"version": "1.0.0",
|
||||
"main": "index.js",
|
||||
"type": "module",
|
||||
"scripts": {
|
||||
"test": "echo \"Error: no test specified\" && exit 1",
|
||||
"y-websocket": "y-websocket"
|
||||
"dev": "vite",
|
||||
"build": "vite build",
|
||||
"preview": "vite preview"
|
||||
},
|
||||
"keywords": [],
|
||||
"author": "",
|
||||
"license": "ISC",
|
||||
"description": "",
|
||||
"dependencies": {
|
||||
"ws": "^8.19.0",
|
||||
"@y/protocols": "^1.0.6-1",
|
||||
"lib0": "^0.2.102",
|
||||
"yjs": "^14.0.0-7"
|
||||
"yjs": "^13.6.0",
|
||||
"y-webrtc": "^10.3.0"
|
||||
},
|
||||
"devDependencies": {
|
||||
"vite": "^6.0.0"
|
||||
}
|
||||
}
|
||||
|
||||
136
src/main.js
Normal file
136
src/main.js
Normal file
@@ -0,0 +1,136 @@
|
||||
import * as Y from 'yjs';
|
||||
import { WebrtcProvider } from 'y-webrtc';
|
||||
|
||||
// --- Peer ID (stable across reloads) ---
|
||||
|
||||
function getOrCreatePeerId() {
|
||||
let id = localStorage.getItem('peer-id');
|
||||
if (!id) {
|
||||
id = crypto.randomUUID();
|
||||
localStorage.setItem('peer-id', id);
|
||||
}
|
||||
return id;
|
||||
}
|
||||
|
||||
const peerId = getOrCreatePeerId();
|
||||
|
||||
// --- Room name from URL ---
|
||||
|
||||
function getRoomName() {
|
||||
const params = new URLSearchParams(window.location.search);
|
||||
return params.get('room') || 'default-poll';
|
||||
}
|
||||
|
||||
const roomName = getRoomName();
|
||||
|
||||
// --- Yjs setup ---
|
||||
|
||||
const ydoc = new Y.Doc();
|
||||
const provider = new WebrtcProvider(roomName, ydoc);
|
||||
const yOptions = ydoc.getMap('poll-options');
|
||||
|
||||
// --- Data operations ---
|
||||
|
||||
function addOption(name) {
|
||||
const id = crypto.randomUUID();
|
||||
const optionMap = new Y.Map();
|
||||
optionMap.set('name', name);
|
||||
optionMap.set('votes', new Y.Map());
|
||||
yOptions.set(id, optionMap);
|
||||
}
|
||||
|
||||
function toggleVote(optionId) {
|
||||
const optionMap = yOptions.get(optionId);
|
||||
if (!optionMap) return;
|
||||
const votes = optionMap.get('votes');
|
||||
if (votes.has(peerId)) {
|
||||
votes.delete(peerId);
|
||||
} else {
|
||||
votes.set(peerId, true);
|
||||
}
|
||||
}
|
||||
|
||||
// --- UI rendering ---
|
||||
|
||||
const container = document.getElementById('poll-options');
|
||||
const emptyState = document.getElementById('empty-state');
|
||||
|
||||
function render() {
|
||||
container.innerHTML = '';
|
||||
|
||||
const entries = [];
|
||||
yOptions.forEach((optionMap, id) => {
|
||||
entries.push({
|
||||
id,
|
||||
name: optionMap.get('name'),
|
||||
votes: optionMap.get('votes').size,
|
||||
voted: optionMap.get('votes').has(peerId),
|
||||
});
|
||||
});
|
||||
|
||||
entries.sort((a, b) => b.votes - a.votes || a.name.localeCompare(b.name));
|
||||
|
||||
emptyState.className = entries.length > 0 ? 'hidden' : '';
|
||||
|
||||
for (const entry of entries) {
|
||||
const div = document.createElement('div');
|
||||
div.className = 'poll-option';
|
||||
|
||||
const nameSpan = document.createElement('span');
|
||||
nameSpan.className = 'option-name';
|
||||
nameSpan.textContent = entry.name;
|
||||
|
||||
const voteCount = document.createElement('span');
|
||||
voteCount.className = 'vote-count';
|
||||
voteCount.textContent = entry.votes;
|
||||
|
||||
const voteBtn = document.createElement('button');
|
||||
voteBtn.className = entry.voted ? 'vote-btn voted' : 'vote-btn';
|
||||
voteBtn.textContent = entry.voted ? 'Unvote' : 'Vote';
|
||||
voteBtn.addEventListener('click', () => toggleVote(entry.id));
|
||||
|
||||
div.append(nameSpan, voteCount, voteBtn);
|
||||
container.appendChild(div);
|
||||
}
|
||||
}
|
||||
|
||||
// Re-render on any change in the shared state
|
||||
yOptions.observeDeep(() => render());
|
||||
|
||||
// --- Add option handlers ---
|
||||
|
||||
const input = document.getElementById('option-input');
|
||||
const addBtn = document.getElementById('add-btn');
|
||||
|
||||
addBtn.addEventListener('click', () => {
|
||||
const name = input.value.trim();
|
||||
if (name) {
|
||||
addOption(name);
|
||||
input.value = '';
|
||||
}
|
||||
});
|
||||
|
||||
input.addEventListener('keydown', (e) => {
|
||||
if (e.key === 'Enter') addBtn.click();
|
||||
});
|
||||
|
||||
// --- Connection status & peer count ---
|
||||
|
||||
const statusEl = document.getElementById('connection-status');
|
||||
const peerCountEl = document.getElementById('peer-count');
|
||||
|
||||
provider.on('synced', ({ synced }) => {
|
||||
statusEl.textContent = synced ? 'Connected' : 'Connecting...';
|
||||
statusEl.className = synced ? 'connected' : 'connecting';
|
||||
});
|
||||
|
||||
function updatePeerCount() {
|
||||
const count = provider.awareness.getStates().size;
|
||||
peerCountEl.textContent = `${count} peer${count !== 1 ? 's' : ''}`;
|
||||
}
|
||||
|
||||
provider.awareness.on('change', updatePeerCount);
|
||||
updatePeerCount();
|
||||
|
||||
// --- Initial render ---
|
||||
render();
|
||||
144
src/style.css
Normal file
144
src/style.css
Normal file
@@ -0,0 +1,144 @@
|
||||
* {
|
||||
margin: 0;
|
||||
padding: 0;
|
||||
box-sizing: border-box;
|
||||
}
|
||||
|
||||
body {
|
||||
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
|
||||
background: #f5f5f5;
|
||||
color: #333;
|
||||
min-height: 100vh;
|
||||
}
|
||||
|
||||
#app {
|
||||
max-width: 600px;
|
||||
margin: 0 auto;
|
||||
padding: 2rem 1rem;
|
||||
}
|
||||
|
||||
header {
|
||||
display: flex;
|
||||
justify-content: space-between;
|
||||
align-items: center;
|
||||
margin-bottom: 2rem;
|
||||
}
|
||||
|
||||
h1 {
|
||||
font-size: 1.5rem;
|
||||
}
|
||||
|
||||
#status {
|
||||
display: flex;
|
||||
gap: 1rem;
|
||||
font-size: 0.85rem;
|
||||
color: #666;
|
||||
}
|
||||
|
||||
#connection-status::before {
|
||||
content: "";
|
||||
display: inline-block;
|
||||
width: 8px;
|
||||
height: 8px;
|
||||
border-radius: 50%;
|
||||
margin-right: 4px;
|
||||
vertical-align: middle;
|
||||
}
|
||||
|
||||
#connection-status.connected::before {
|
||||
background: #4caf50;
|
||||
}
|
||||
|
||||
#connection-status.connecting::before {
|
||||
background: #ff9800;
|
||||
}
|
||||
|
||||
#add-option {
|
||||
display: flex;
|
||||
gap: 0.5rem;
|
||||
margin-bottom: 1.5rem;
|
||||
}
|
||||
|
||||
#option-input {
|
||||
flex: 1;
|
||||
padding: 0.6rem 0.8rem;
|
||||
border: 1px solid #ddd;
|
||||
border-radius: 6px;
|
||||
font-size: 1rem;
|
||||
outline: none;
|
||||
}
|
||||
|
||||
#option-input:focus {
|
||||
border-color: #2196f3;
|
||||
}
|
||||
|
||||
#add-btn {
|
||||
padding: 0.6rem 1.2rem;
|
||||
background: #2196f3;
|
||||
color: white;
|
||||
border: none;
|
||||
border-radius: 6px;
|
||||
font-size: 1rem;
|
||||
cursor: pointer;
|
||||
}
|
||||
|
||||
#add-btn:hover {
|
||||
background: #1976d2;
|
||||
}
|
||||
|
||||
.poll-option {
|
||||
display: flex;
|
||||
align-items: center;
|
||||
background: white;
|
||||
padding: 0.8rem 1rem;
|
||||
border-radius: 8px;
|
||||
margin-bottom: 0.5rem;
|
||||
box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
|
||||
}
|
||||
|
||||
.option-name {
|
||||
flex: 1;
|
||||
font-size: 1rem;
|
||||
}
|
||||
|
||||
.vote-count {
|
||||
font-size: 0.9rem;
|
||||
font-weight: 600;
|
||||
color: #666;
|
||||
margin-right: 0.75rem;
|
||||
min-width: 1.5rem;
|
||||
text-align: center;
|
||||
}
|
||||
|
||||
.vote-btn {
|
||||
padding: 0.4rem 1rem;
|
||||
border: 2px solid #2196f3;
|
||||
border-radius: 6px;
|
||||
font-size: 0.85rem;
|
||||
cursor: pointer;
|
||||
background: white;
|
||||
color: #2196f3;
|
||||
}
|
||||
|
||||
.vote-btn:hover {
|
||||
background: #e3f2fd;
|
||||
}
|
||||
|
||||
.vote-btn.voted {
|
||||
background: #2196f3;
|
||||
color: white;
|
||||
}
|
||||
|
||||
.vote-btn.voted:hover {
|
||||
background: #1976d2;
|
||||
}
|
||||
|
||||
#empty-state {
|
||||
text-align: center;
|
||||
color: #999;
|
||||
padding: 2rem;
|
||||
}
|
||||
|
||||
#empty-state.hidden {
|
||||
display: none;
|
||||
}
|
||||
291
utils.js
291
utils.js
@@ -1,291 +0,0 @@
|
||||
/* Adapted from https://github.com/yjs/y-websocket-server/blob/main/src/server.js, version of 2025-04-02
|
||||
(author: dmonad/Kevin Jahns, MIT license) */
|
||||
|
||||
import * as Y from 'yjs'
|
||||
import * as syncProtocol from '@y/protocols/sync'
|
||||
import * as awarenessProtocol from '@y/protocols/awareness'
|
||||
|
||||
import * as encoding from 'lib0/encoding'
|
||||
import * as decoding from 'lib0/decoding'
|
||||
import * as map from 'lib0/map'
|
||||
|
||||
import * as eventloop from 'lib0/eventloop'
|
||||
|
||||
/*import { callbackHandler, isCallbackSet } from './callback.js'
|
||||
|
||||
const CALLBACK_DEBOUNCE_WAIT = parseInt(process.env.CALLBACK_DEBOUNCE_WAIT || '2000')
|
||||
const CALLBACK_DEBOUNCE_MAXWAIT = parseInt(process.env.CALLBACK_DEBOUNCE_MAXWAIT || '10000')
|
||||
|
||||
const debouncer = eventloop.createDebouncer(CALLBACK_DEBOUNCE_WAIT, CALLBACK_DEBOUNCE_MAXWAIT)*/
|
||||
|
||||
const wsReadyStateConnecting = 0
|
||||
const wsReadyStateOpen = 1
|
||||
const wsReadyStateClosing = 2 // eslint-disable-line
|
||||
const wsReadyStateClosed = 3 // eslint-disable-line
|
||||
|
||||
// disable gc when using snapshots!
|
||||
const gcEnabled = process.env.GC !== 'false' && process.env.GC !== '0'
|
||||
// const persistenceDir = process.env.YPERSISTENCE
|
||||
/**
|
||||
* @type {{bindState: function(string,WSSharedDoc):void, writeState:function(string,WSSharedDoc):Promise<any>, provider: any}|null}
|
||||
*/
|
||||
let persistence = null
|
||||
|
||||
/**
|
||||
* @param {{bindState: function(string,WSSharedDoc):void,
|
||||
* writeState:function(string,WSSharedDoc):Promise<any>,provider:any}|null} persistence_
|
||||
*/
|
||||
export const setPersistence = persistence_ => {
|
||||
persistence = persistence_
|
||||
}
|
||||
|
||||
/**
|
||||
* @return {null|{bindState: function(string,WSSharedDoc):void,
|
||||
* writeState:function(string,WSSharedDoc):Promise<any>}|null} used persistence layer
|
||||
*/
|
||||
export const getPersistence = () => persistence
|
||||
|
||||
/**
|
||||
* @type {Map<string,WSSharedDoc>}
|
||||
*/
|
||||
export const docs = new Map()
|
||||
|
||||
const messageSync = 0
|
||||
const messageAwareness = 1
|
||||
// const messageAuth = 2
|
||||
//const messageTextMessage = 3
|
||||
//const messageStateMessage = 4
|
||||
|
||||
/**
|
||||
* @param {Uint8Array} update
|
||||
* @param {any} _origin
|
||||
* @param {WSSharedDoc} doc
|
||||
* @param {any} _tr
|
||||
*/
|
||||
const updateHandler = (update, _origin, doc, _tr) => {
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageSync)
|
||||
syncProtocol.writeUpdate(encoder, update)
|
||||
const message = encoding.toUint8Array(encoder)
|
||||
doc.conns.forEach((_, conn) => send(doc, conn, message))
|
||||
}
|
||||
|
||||
/**
|
||||
* @type {(ydoc: Y.Doc) => Promise<void>}
|
||||
*/
|
||||
let contentInitializor = _ydoc => Promise.resolve()
|
||||
|
||||
/**
|
||||
* This function is called once every time a Yjs document is created. You can
|
||||
* use it to pull data from an external source or initialize content.
|
||||
*
|
||||
* @param {(ydoc: Y.Doc) => Promise<void>} f
|
||||
*/
|
||||
export const setContentInitializor = (f) => {
|
||||
contentInitializor = f
|
||||
}
|
||||
|
||||
export class WSSharedDoc extends Y.Doc {
|
||||
/**
|
||||
* @param {string} name
|
||||
*/
|
||||
constructor (name) {
|
||||
super({ gc: gcEnabled })
|
||||
this.name = name
|
||||
/**
|
||||
* Maps from conn to set of controlled user ids. Delete all user ids from awareness when this conn is closed
|
||||
* @type {Map<Object, Set<number>>}
|
||||
*/
|
||||
this.conns = new Map()
|
||||
/**
|
||||
* @type {awarenessProtocol.Awareness}
|
||||
*/
|
||||
this.awareness = new awarenessProtocol.Awareness(this)
|
||||
this.awareness.setLocalState(null)
|
||||
/**
|
||||
* @param {{ added: Array<number>, updated: Array<number>, removed: Array<number> }} changes
|
||||
* @param {Object | null} conn Origin is the connection that made the change
|
||||
*/
|
||||
const awarenessChangeHandler = ({ added, updated, removed }, conn) => {
|
||||
const changedClients = added.concat(updated, removed)
|
||||
if (conn !== null) {
|
||||
const connControlledIDs = /** @type {Set<number>} */ (this.conns.get(conn))
|
||||
if (connControlledIDs !== undefined) {
|
||||
added.forEach(clientID => { connControlledIDs.add(clientID) })
|
||||
removed.forEach(clientID => { connControlledIDs.delete(clientID) })
|
||||
}
|
||||
}
|
||||
// broadcast awareness update
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageAwareness)
|
||||
encoding.writeVarUint8Array(encoder, awarenessProtocol.encodeAwarenessUpdate(this.awareness, changedClients))
|
||||
const buff = encoding.toUint8Array(encoder)
|
||||
this.conns.forEach((_, c) => {
|
||||
send(this, c, buff)
|
||||
})
|
||||
}
|
||||
this.awareness.on('update', awarenessChangeHandler)
|
||||
this.on('update', /** @type {any} */ (updateHandler))
|
||||
//if (isCallbackSet) {
|
||||
// this.on('update', (_update, _origin, doc) => {
|
||||
// debouncer(() => callbackHandler(/** @type {WSSharedDoc} */ (doc)))
|
||||
// })
|
||||
//}
|
||||
this.whenInitialized = contentInitializor(this)
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Gets a Y.Doc by name, whether in memory or on disk
|
||||
*
|
||||
* @param {string} docname - the name of the Y.Doc to find or create
|
||||
* @param {boolean} gc - whether to allow gc on the doc (applies only when created)
|
||||
* @return {WSSharedDoc}
|
||||
*/
|
||||
export const getYDoc = (docname, gc = true) => map.setIfUndefined(docs, docname, () => {
|
||||
const doc = new WSSharedDoc(docname)
|
||||
doc.gc = gc
|
||||
if (persistence !== null) {
|
||||
persistence.bindState(docname, doc)
|
||||
}
|
||||
docs.set(docname, doc)
|
||||
return doc
|
||||
})
|
||||
|
||||
/**
|
||||
* @param {any} conn
|
||||
* @param {WSSharedDoc} doc
|
||||
* @param {Uint8Array} message
|
||||
*/
|
||||
const messageListener = (conn, doc, message) => {
|
||||
try {
|
||||
const encoder = encoding.createEncoder()
|
||||
const decoder = decoding.createDecoder(new Uint8Array(message))
|
||||
const messageType = decoding.readVarUint(decoder)
|
||||
switch (messageType) {
|
||||
case messageSync:
|
||||
encoding.writeVarUint(encoder, messageSync)
|
||||
syncProtocol.readSyncMessage(decoder, encoder, doc, conn)
|
||||
|
||||
// If the `encoder` only contains the type of reply message and no
|
||||
// message, there is no need to send the message. When `encoder` only
|
||||
// contains the type of reply, its length is 1.
|
||||
if (encoding.length(encoder) > 1) {
|
||||
send(doc, conn, encoding.toUint8Array(encoder))
|
||||
}
|
||||
break
|
||||
case messageAwareness: {
|
||||
awarenessProtocol.applyAwarenessUpdate(doc.awareness, decoding.readVarUint8Array(decoder), conn)
|
||||
break
|
||||
}
|
||||
// If this is a text or a message (no Yjs logic) - echo the message back to the client
|
||||
default: {
|
||||
conn.send(String(message))
|
||||
console.log(String(message))
|
||||
break
|
||||
}
|
||||
}
|
||||
} catch (err) {
|
||||
console.error(err)
|
||||
// @ts-ignore
|
||||
doc.emit('error', [err])
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {WSSharedDoc} doc
|
||||
* @param {any} conn
|
||||
*/
|
||||
const closeConn = (doc, conn) => {
|
||||
if (doc.conns.has(conn)) {
|
||||
/**
|
||||
* @type {Set<number>}
|
||||
*/
|
||||
// @ts-ignore
|
||||
const controlledIds = doc.conns.get(conn)
|
||||
doc.conns.delete(conn)
|
||||
awarenessProtocol.removeAwarenessStates(doc.awareness, Array.from(controlledIds), null)
|
||||
if (doc.conns.size === 0 && persistence !== null) {
|
||||
// if persisted, we store state and destroy ydocument
|
||||
persistence.writeState(doc.name, doc).then(() => {
|
||||
doc.destroy()
|
||||
})
|
||||
docs.delete(doc.name)
|
||||
}
|
||||
}
|
||||
conn.close()
|
||||
}
|
||||
|
||||
/**
|
||||
* @param {WSSharedDoc} doc
|
||||
* @param {import('ws').WebSocket} conn
|
||||
* @param {Uint8Array} m
|
||||
*/
|
||||
const send = (doc, conn, m) => {
|
||||
if (conn.readyState !== wsReadyStateConnecting && conn.readyState !== wsReadyStateOpen) {
|
||||
closeConn(doc, conn)
|
||||
}
|
||||
try {
|
||||
conn.send(m, {}, err => { err != null && closeConn(doc, conn) })
|
||||
} catch (e) {
|
||||
closeConn(doc, conn)
|
||||
}
|
||||
}
|
||||
|
||||
const pingTimeout = 30000
|
||||
|
||||
/**
|
||||
* @param {import('ws').WebSocket} conn
|
||||
* @param {import('http').IncomingMessage} req
|
||||
* @param {any} opts
|
||||
*/
|
||||
export const setupWSConnection = (conn, req, { docName = (req.url || '').slice(1).split('?')[0], gc = true } = {}) => {
|
||||
conn.binaryType = 'arraybuffer'
|
||||
// get doc, initialize if it does not exist yet
|
||||
const doc = getYDoc(docName, gc)
|
||||
doc.conns.set(conn, new Set())
|
||||
// listen and reply to events
|
||||
conn.on('message', /** @param {ArrayBuffer} message */ message => messageListener(conn, doc, message))
|
||||
|
||||
// Check if connection is still alive
|
||||
let pongReceived = true
|
||||
const pingInterval = setInterval(() => {
|
||||
if (!pongReceived) {
|
||||
if (doc.conns.has(conn)) {
|
||||
closeConn(doc, conn)
|
||||
}
|
||||
clearInterval(pingInterval)
|
||||
} else if (doc.conns.has(conn)) {
|
||||
pongReceived = false
|
||||
try {
|
||||
conn.ping()
|
||||
} catch (e) {
|
||||
closeConn(doc, conn)
|
||||
clearInterval(pingInterval)
|
||||
}
|
||||
}
|
||||
}, pingTimeout)
|
||||
conn.on('close', () => {
|
||||
closeConn(doc, conn)
|
||||
clearInterval(pingInterval)
|
||||
})
|
||||
conn.on('pong', () => {
|
||||
pongReceived = true
|
||||
})
|
||||
// put the following in a variables in a block so the interval handlers don't keep in in
|
||||
// scope
|
||||
{
|
||||
// send sync step 1
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageSync)
|
||||
syncProtocol.writeSyncStep1(encoder, doc)
|
||||
send(doc, conn, encoding.toUint8Array(encoder))
|
||||
const awarenessStates = doc.awareness.getStates()
|
||||
if (awarenessStates.size > 0) {
|
||||
const encoder = encoding.createEncoder()
|
||||
encoding.writeVarUint(encoder, messageAwareness)
|
||||
encoding.writeVarUint8Array(encoder, awarenessProtocol.encodeAwarenessUpdate(doc.awareness, Array.from(awarenessStates.keys())))
|
||||
send(doc, conn, encoding.toUint8Array(encoder))
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user