cleanup (subfolder removed, npm packages removed, etc.); added y-websocket-server code

implemented frontend including separate message system; started to implement backend
2026-03-16 02:27:53 +01:00 · 2026-03-10 17:30:43 +01:00
17 changed files with 615 additions and 2240 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1 @@
-dist
-node_modules
+node_modules/
--- a/README.md
+++ b/README.md
@@ -1,44 +1,28 @@
 # P2P Poll App

-A peer-to-peer polling application where users create and vote on polls without any central server. All data syncs directly between browsers using WebRTC and CRDTs.
-
-## Features
-
- **Real-time P2P sync** — poll options and votes sync instantly across all connected peers via WebRTC
- **Collaborative poll title** — editable title that syncs between all participants
- **One vote per user** — each peer gets a stable ID, enforcing one vote per person per option
- **Vote/Unvote toggle** — change your mind anytime
- **Connection status** — see when you're connected and how many peers are in the room
- **Shareable polls** — share via URL with `?room=your-poll-name`
- **No backend required** — runs entirely in the browser
-
-## Tech Stack
-
- [Yjs](https://yjs.dev/) — CRDT library for conflict-free shared state
- [y-webrtc](https://github.com/yjs/y-webrtc) — WebRTC provider for peer-to-peer connections
- [Vite](https://vitejs.dev/) — Development server and build tool
- Vanilla JavaScript — no framework dependencies
-
-## Getting Started
-
-```bash
+## Install npm packages
+```
+npm init -y
 npm install
-npm run dev
 ```

-Open `http://localhost:5173/?room=my-poll` in multiple browser tabs to test.
+Note: the frontend obtains the packages `yjs` and `y-websocket` dynamically.

-To test across devices on the same network:
-
-```bash
-npm run dev -- --host
+## Run backend
+```
+node backend.js
 ```

-Then open the URL shown in the terminal on other devices.
+### Note on Yjs suggestion
+Note that the following server setup is suggested in the Yjs docs (https://docs.yjs.dev/ecosystem/connection-provider/y-websocket):
+```
+npm install y-websocket-server
+HOST=localhost PORT=1000 npx y-websocket
+```

-## How It Works
+However, across a range of npm versions, this does not work.
+Nevertheless, the essential code from the `y-websocket-server` package is used here as provided in `utils.js`.
+
+## Run frontend
+Open "frontend.html" in browser.

-1. Each browser tab creates a Yjs document and connects to other peers via WebRTC
-2. Poll options and votes are stored in Yjs shared data types (Y.Map)
-3. Changes propagate automatically to all connected peers using CRDTs
-4. A public signaling server handles peer discovery; all poll data flows directly between browsers
--- a/backend.js
+++ b/backend.js
@@ -0,0 +1,31 @@
+import { WebSocketServer } from 'ws';
+import { setupWSConnection } from './utils.js'
+
+// Create a WebSocket server
+const WS_PORT = 8080;
+const wss = new WebSocketServer({ port: WS_PORT });
+
+console.log('WebSocket server is running on ws://localhost:' + String(WS_PORT));
+
+// Connection event handler
+wss.on('connection', setupWSConnection);
+/*
+wss.on('connection', (ws) => {
+  console.log('Client connected');
+
+  // Message event handler
+  ws.on('message', (message) => {
+    let msg_str = String(message);
+    console.log("Received: " + msg_str);
+    
+    // If this is a text or state message (no Yjs logic) - echo the message back to the client
+    if (msg_str.startsWith("TEXT_MESSAGE") | msg_str.startsWith("STATE_MESSAGE")) {
+      ws.send(msg_str);
+    }
+  });
+
+  // Close event handler
+  ws.on('close', () => {
+    console.log('Client disconnected');
+  });
+});*/
--- a/frontend.html
+++ b/frontend.html
@@ -0,0 +1,196 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Poll Client</title>
+  <style>
+    body {
+      font-family: Arial, sans-serif;
+      max-width: 600px;
+      margin: 0 auto;
+      padding: 20px;
+    }
+    #messages {
+      height: 300px;
+      border: 1px solid #ccc;
+      overflow-y: auto;
+      padding: 10px;
+      margin-bottom: 10px;
+    }
+    .message { margin: 5px 0; }
+  </style>
+</head>
+<body>
+  <h1>Poll Client</h1>
+  <div id="status">Connecting to server...</div>
+  <div id="status2">Connecting to server...</div>
+  <div id="messages"></div>
+  <div>
+    <input type="text" id="messageInput" placeholder="Type your message">
+    <!--button onclick="sendMessage()">Send</button-->
+    <button id="sendBtn">Send</button>
+    <input id="optionInput" placeholder="Add option">
+    <button id="addBtn">Add</button>
+    <ul id="options"></ul>
+  </div>
+
+  <script type="module">
+    import * as Y from "https://esm.sh/yjs"
+    import { WebsocketProvider } from "https://esm.sh/y-websocket"
+
+    const WS_PORT = 8080;
+    const ydoc = new Y.Doc();
+    const status = document.getElementById('status');
+    const status2 = document.getElementById('status2');
+    const messages = document.getElementById('messages');
+    const messageInput = document.getElementById('messageInput');
+
+    // Connect to the backend (WebSocket server) via Yjs WebsocketProvider
+    const wsp = new WebsocketProvider(
+      'ws://localhost:' + String(WS_PORT), 'poll-room',
+      ydoc
+    )
+    wsp.on('status', event => {
+      //console.log("event.status =", event.status)
+      if (event.status == "connected") {
+        status.textContent = 'Yjs connected to WebSocket server';
+        status.style.color = 'green';
+      }
+      else {
+        status.textContent = 'Yjs disonnected from WebSocket server';
+        status.style.color = 'red';
+      }
+    })
+    wsp.onopen = () => {
+      console.log('connected to y-websocket server');
+    };
+    ydoc.on('update', () => {
+      console.log('Yjs document updated locally');
+    });
+    wsp.on('sync', isSynced => {
+      console.log("isSynced =", isSynced)
+    })
+
+    // Connect to the backend (WebSocket server) via common WebSocket (only for informative messages)
+    const ws = new WebSocket('ws://localhost:' + String(WS_PORT));
+    ws.onopen = () => {
+      status2.textContent = 'WebSocket client connected to WebSocket server';
+      status2.style.color = 'green';
+    };
+    ws.onmessage = (event) => {
+      const message = document.createElement('div');
+      message.className = 'message';
+      message.textContent = event.data;
+      messages.appendChild(message);
+      messages.scrollTop = messages.scrollHeight;
+    };
+    ws.onerror = (error) => {
+      status2.textContent = 'Error: ' + error.message;
+      status2.style.color = 'red';
+    };
+    ws.onclose = () => {
+      status2.textContent = 'WebSocket client disconnected from WebSocket server';
+      status2.style.color = 'red';
+    };
+
+    // Function to send a message
+    function sendMessage(command, payload) {
+        let message = "";
+        if (command === "TEXT_MESSAGE") {
+            message = command + ":" + messageInput.value.trim();
+            messageInput.value = "";
+        }
+        else if (command.startsWith("STATE_MESSAGE--")) {
+            message = command + ":" + payload;
+        }
+        else {
+            console.log("Error: unknown command '" + command + "'")
+        }
+
+        if (message) {
+            /* To make compatible with y-websocket-server API:
+            const encoder = encoding.createEncoder()
+            encoding.writeVarUint(encoder, messageTextMessage)
+            syncProtocol.writeUpdate(encoder, update)
+            enc_message = encoding.toUint8Array(encoder)*/
+            ws.send(message);
+        }
+    }
+
+     // Send message on button click
+    document.getElementById("sendBtn").onclick = () => {
+        sendMessage("TEXT_MESSAGE", "");
+    };
+
+    // Send message on Enter key
+    messageInput.addEventListener('keypress', (e) => {
+      if (e.key === 'Enter') {
+        sendMessage("TEXT_MESSAGE", "");
+      }
+    });
+    
+    // Actual poll logic
+    const optionsMap = ydoc.getMap("options");
+
+    const optionsList = document.getElementById("options");
+    const input = document.getElementById("optionInput");
+
+    function render() {
+        optionsList.innerHTML = ""
+
+        optionsMap.forEach((vote, name) => {
+            // List element for this option
+            const li = document.createElement("li")
+
+            // Label for this option
+            const label = document.createElement("span")
+            label.textContent = name + " — " + vote + " "
+
+            // "Vote"/"Unvote" button
+            const voteBtn = document.createElement("button")
+            if (vote == false) {
+                voteBtn.textContent = "Vote"
+            }
+            else {
+                voteBtn.textContent = "Unvote"
+            }
+            voteBtn.onclick = () => {
+                vote = !vote;
+                optionsMap.set(name, vote);
+                sendMessage("STATE_MESSAGE--" + (vote ? "VOTE" : "UNVOTE"), name);
+            }
+
+            // "Remove" button
+            const removeBtn = document.createElement("button")
+            removeBtn.textContent = "Remove"
+            removeBtn.onclick = () => {
+                optionsMap.delete(name);
+                sendMessage("STATE_MESSAGE--REMOVE", name);
+            }
+
+            li.appendChild(label)
+            li.appendChild(voteBtn)
+            li.appendChild(removeBtn)
+
+            optionsList.appendChild(li)
+        })
+    };
+
+    document.getElementById("addBtn").onclick = () => {
+        const name = input.value.trim()
+
+        if (!name) return
+
+        if (!optionsMap.has(name)) {
+            optionsMap.set(name, false);
+            sendMessage("STATE_MESSAGE--ADD_OPTION", name);
+        }
+
+        input.value = ""
+    };
+
+    optionsMap.observe(render);
+
+    render();
+  </script>
+</body>
+</html>
--- a/index.html
+++ b/index.html
@@ -1,13 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <meta name="viewport" content="width=device-width, initial-scale=1.0">
-  <title>Polly — P2P Polls</title>
-  <link rel="stylesheet" href="/src/style.css">
-</head>
-<body>
-  <div id="app"></div>
-  <script type="module" src="/src/main.js"></script>
-</body>
-</html>
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@@ -1,18 +1,20 @@
 {
-  "name": "p2p-poll",
-  "private": true,
+  "name": "yjs-poll",
  "version": "1.0.0",
+  "main": "index.js",
  "type": "module",
  "scripts": {
-    "dev": "vite",
-    "build": "vite build",
-    "preview": "vite preview"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "y-websocket": "y-websocket"
  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "description": "",
  "dependencies": {
-    "yjs": "^13.6.0",
-    "y-webrtc": "^10.3.0"
-  },
-  "devDependencies": {
-    "vite": "^6.0.0"
+    "ws": "^8.19.0",
+    "@y/protocols": "^1.0.6-1",
+    "lib0": "^0.2.102",
+    "yjs": "^14.0.0-7"
  }
 }
--- a/src/components/AddOption.js
+++ b/src/components/AddOption.js
@@ -1,47 +0,0 @@
-import { addOption } from '../utils/store.js';
-
-export function AddOption() {
-  const wrapper = document.createElement('div');
-  wrapper.className = 'add-option-wrapper';
-
-  const input = document.createElement('input');
-  input.type = 'text';
-  input.className = 'add-option-input';
-  input.placeholder = 'Add an option…';
-  input.maxLength = 100;
-  input.setAttribute('aria-label', 'New poll option');
-
-  const btn = document.createElement('button');
-  btn.className = 'add-option-btn';
-  btn.setAttribute('aria-label', 'Add option');
-
-  // Plus icon
-  btn.innerHTML = `
-    <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" aria-hidden="true">
-      <path d="M8 2v12M2 8h12" stroke="currentColor" stroke-width="1.75" stroke-linecap="round"/>
-    </svg>
-    <span>Add</span>
-  `;
-
-  wrapper.append(input, btn);
-
-  function submit() {
-    const name = input.value.trim();
-    if (!name) {
-      input.focus();
-      input.classList.add('shake');
-      input.addEventListener('animationend', () => input.classList.remove('shake'), { once: true });
-      return;
-    }
-    addOption(name);
-    input.value = '';
-    input.focus();
-  }
-
-  btn.addEventListener('click', submit);
-  input.addEventListener('keydown', (e) => {
-    if (e.key === 'Enter') submit();
-  });
-
-  return wrapper;
-}
--- a/src/components/PollList.js
+++ b/src/components/PollList.js
@@ -1,77 +0,0 @@
-import { yOptions, getEntries, getTotalVotes  } from '../utils/store.js';
-import { PollOption } from './PollOption.js';
-
-export function PollList() {
-  const wrapper = document.createElement('div');
-  wrapper.className = 'poll-list-wrapper';
-
-  const meta = document.createElement('div');
-  meta.className = 'poll-list-meta';
-
-  const list = document.createElement('div');
-  list.className = 'poll-list';
-
-  const empty = document.createElement('div');
-  empty.className = 'poll-list-empty';
-  empty.innerHTML = `
-    <div class="empty-icon">
-      <svg width="32" height="32" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg">
-        <rect x="4" y="10" width="24" height="3" rx="1.5" fill="currentColor" opacity="0.15"/>
-        <rect x="4" y="16" width="18" height="3" rx="1.5" fill="currentColor" opacity="0.1"/>
-        <rect x="4" y="22" width="21" height="3" rx="1.5" fill="currentColor" opacity="0.07"/>
-      </svg>
-    </div>
-    <p>No options yet — add the first one above.</p>
-  `;
-
-  wrapper.append(meta, list, empty);
-
-  function render() {
-    const entries = getEntries();
-    const total = getTotalVotes();
-
-    // Meta line
-    if (entries.length > 0) {
-      meta.textContent = `${entries.length} option${entries.length !== 1 ? 's' : ''} · ${total} vote${total !== 1 ? 's' : ''} total`;
-      meta.style.display = '';
-    } else {
-      meta.style.display = 'none';
-    }
-
-    // Empty state
-    empty.style.display = entries.length === 0 ? '' : 'none';
-
-    // Diff-render: reuse existing rows when possible
-    const existing = new Map(
-      [...list.querySelectorAll('.poll-option')].map((el) => [el.dataset.id, el])
-    );
-
-    // Remove stale rows
-    existing.forEach((el, id) => {
-      if (!entries.find((e) => e.id === id)) el.remove();
-    });
-
-    // Update or insert rows in sorted order
-    entries.forEach((entry, i) => {
-      const newEl = PollOption({ ...entry, totalVotes: total });
-      const currentEl = list.children[i];
-
-      if (!currentEl) {
-        list.appendChild(newEl);
-      } else if (currentEl.dataset.id !== entry.id) {
-        list.insertBefore(newEl, currentEl);
-        // Remove the now-displaced old element if it was this id
-        const old = existing.get(entry.id);
-        if (old && old !== currentEl) old.remove();
-      } else {
-        // Replace in-place so vote bar animation triggers
-        list.replaceChild(newEl, currentEl);
-      }
-    });
-  }
-
-  yOptions.observeDeep(() => render());
-  render();
-
-  return wrapper;
-}
--- a/src/components/PollOption.js
+++ b/src/components/PollOption.js
@@ -1,44 +0,0 @@
-import { toggleVote, deleteOption } from '../utils/store.js';
-
-/**
- * @param {{ id: string, name: string, votes: number, voted: boolean, totalVotes: number }} entry
- */
-export function PollOption({ id, name, votes, voted, totalVotes }) {
-  const row = document.createElement('div');
-  row.className = `poll-option${voted ? ' poll-option--voted' : ''}`;
-  row.dataset.id = id;
-
-  const pct = totalVotes > 0 ? Math.round((votes / totalVotes) * 100) : 0;
-
-  row.innerHTML = `
-    <div class="poll-option__bar" style="width: ${pct}%"></div>
-    <div class="poll-option__content">
-      <span class="poll-option__name">${escapeHtml(name)}</span>
-      <div class="poll-option__actions">
-        <span class="poll-option__pct">${pct}%</span>
-        <span class="poll-option__count">${votes} vote${votes !== 1 ? 's' : ''}</span>
-        <button class="poll-option__vote-btn" aria-pressed="${voted}">
-          ${voted ? 'Voted' : 'Vote'}
-        </button>
-        <button class="poll-option__delete-btn" aria-label="Remove option">
-          <svg width="14" height="14" viewBox="0 0 14 14" fill="none" xmlns="http://www.w3.org/2000/svg">
-            <path d="M2 2l10 10M12 2L2 12" stroke="currentColor" stroke-width="1.5" stroke-linecap="round"/>
-          </svg>
-        </button>
-      </div>
-    </div>
-  `;
-
-  row.querySelector('.poll-option__vote-btn').addEventListener('click', () => toggleVote(id));
-  row.querySelector('.poll-option__delete-btn').addEventListener('click', () => deleteOption(id));
-
-  return row;
-}
-
-function escapeHtml(str) {
-  return str
-    .replace(/&/g, '&amp;')
-    .replace(/</g, '&lt;')
-    .replace(/>/g, '&gt;')
-    .replace(/"/g, '&quot;');
-}
--- a/src/components/PollTitle.js
+++ b/src/components/PollTitle.js
@@ -1,34 +0,0 @@
-import { ydoc, yTitle } from '../utils/store.js';
-
-export function PollTitle() {
-  const wrapper = document.createElement('div');
-  wrapper.className = 'poll-title-wrapper';
-
-  const input = document.createElement('input');
-  input.type = 'text';
-  input.id = 'poll-title';
-  input.className = 'poll-title-input';
-  input.placeholder = 'Untitled Poll';
-  input.maxLength = 120;
-  input.setAttribute('aria-label', 'Poll title');
-  input.value = yTitle.toString();
-
-  wrapper.appendChild(input);
-
-  // Sync from Yjs → input (only when not focused to avoid cursor jump)
-  yTitle.observe(() => {
-    if (document.activeElement !== input) {
-      input.value = yTitle.toString();
-    }
-  });
-
-  // Sync from input → Yjs
-  input.addEventListener('input', () => {
-    ydoc.transact(() => {
-      yTitle.delete(0, yTitle.length);
-      yTitle.insert(0, input.value);
-    });
-  });
-
-  return wrapper;
-}
--- a/src/components/ShareSection.js
+++ b/src/components/ShareSection.js
@@ -1,38 +0,0 @@
-import { roomName } from '../utils/store.js';
-
-export function ShareSection() {
-  const url = `${window.location.origin}${window.location.pathname}?room=${encodeURIComponent(roomName)}`;
-
-  const section = document.createElement('div');
-  section.className = 'share-section';
-
-  section.innerHTML = `
-    <p class="share-label">Share this poll</p>
-    <div class="share-row">
-      <code class="share-url" title="${url}">${url}</code>
-      <button class="share-copy-btn">Copy link</button>
-    </div>
-  `;
-
-  const copyBtn = section.querySelector('.share-copy-btn');
-
-  copyBtn.addEventListener('click', async () => {
-    try {
-      await navigator.clipboard.writeText(url);
-      copyBtn.textContent = 'Copied!';
-      copyBtn.classList.add('share-copy-btn--success');
-      setTimeout(() => {
-        copyBtn.textContent = 'Copy link';
-        copyBtn.classList.remove('share-copy-btn--success');
-      }, 2000);
-    } catch {
-      // Fallback: select the text
-      const range = document.createRange();
-      range.selectNode(section.querySelector('.share-url'));
-      window.getSelection().removeAllRanges();
-      window.getSelection().addRange(range);
-    }
-  });
-
-  return section;
-}
--- a/src/components/StatusBar.js
+++ b/src/components/StatusBar.js
@@ -1,50 +0,0 @@
-import { provider } from '../utils/store.js';
-
-export function StatusBar() {
-  const el = document.createElement('div');
-  el.className = 'status-bar';
-
-  const dot = document.createElement('span');
-  dot.className = 'status-dot connecting';
-
-  const statusText = document.createElement('span');
-  statusText.className = 'status-text';
-  statusText.textContent = 'Connecting';
-
-  const divider = document.createElement('span');
-  divider.className = 'status-divider';
-  divider.textContent = '·';
-
-  const peerText = document.createElement('span');
-  peerText.className = 'status-peers';
-
-  el.append(dot, statusText, divider, peerText);
-
-  // --- Connection state ---
-
-  let syncTimeout = setTimeout(() => {
-    statusText.textContent = 'Ready';
-    dot.className = 'status-dot ready';
-  }, 3000);
-
-  provider.on('synced', ({ synced }) => {
-    clearTimeout(syncTimeout);
-    dot.className = `status-dot ${synced ? 'connected' : 'connecting'}`;
-    statusText.textContent = synced ? 'Connected' : 'Connecting';
-  });
-
-  // --- Peer count ---
-
-  function updatePeerCount() {
-    const total = provider.awareness.getStates().size;
-    const others = total - 1;
-    peerText.textContent = others === 0
-      ? 'Only you'
-      : `${others} other${others !== 1 ? 's' : ''}`;
-  }
-
-  provider.awareness.on('change', updatePeerCount);
-  updatePeerCount();
-
-  return el;
-}
--- a/src/main.js
+++ b/src/main.js
@@ -1,41 +0,0 @@
-import { StatusBar } from './components/StatusBar.js';
-import { PollTitle } from './components/PollTitle.js';
-import { AddOption } from './components/AddOption.js';
-import { PollList } from './components/PollList.js';
-import { ShareSection } from './components/ShareSection.js';
-
-const app = document.getElementById('app');
-
-// Header: logo + status
-const header = document.createElement('header');
-header.className = 'app-header';
-
-const wordmark = document.createElement('div');
-wordmark.className = 'app-wordmark';
-wordmark.innerHTML = `
-  <svg width="20" height="20" viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg" aria-hidden="true">
-    <rect x="2" y="4" width="16" height="2.5" rx="1.25" fill="currentColor"/>
-    <rect x="2" y="8.75" width="11" height="2.5" rx="1.25" fill="currentColor" opacity="0.6"/>
-    <rect x="2" y="13.5" width="13" height="2.5" rx="1.25" fill="currentColor" opacity="0.35"/>
-  </svg>
-  <span>Polly</span>
-`;
-
-header.append(wordmark, StatusBar());
-
-// Main card
-const card = document.createElement('main');
-card.className = 'app-card';
-
-card.append(
-  PollTitle(),
-  AddOption(),
-  PollList(),
-);
-
-// Footer
-const footer = document.createElement('footer');
-footer.className = 'app-footer';
-footer.appendChild(ShareSection());
-
-app.append(header, card, footer);
--- a/src/style.css
+++ b/src/style.css
@@ -1,412 +0,0 @@
-/* ── Fonts ─────────────────────────────────────────────── */
-@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@300;400;500;600&family=Playfair+Display:wght@500&display=swap');
-
-/* ── Tokens ────────────────────────────────────────────── */
-:root {
-  --bg:            #F7F6F2;
-  --surface:       #FFFFFF;
-  --surface-hover: #FAFAF8;
-  --border:        #E8E5DF;
-  --border-focus:  #1A1A1A;
-
-  --text-primary:   #1A1A1A;
-  --text-secondary: #6B6860;
-  --text-muted:     #AAA79F;
-
-  --accent:         #1A1A1A;
-  --accent-text:    #FFFFFF;
-
-  --vote-bar:       rgba(26, 26, 26, 0.07);
-  --vote-bar-voted: rgba(26, 26, 26, 0.12);
-
-  --success:        #2D7D46;
-  --danger:         #C0392B;
-
-  --radius-sm:  6px;
-  --radius-md:  10px;
-  --radius-lg:  14px;
-
-  --font-display: 'Playfair Display', Georgia, serif;
-  --font-body:    'DM Sans', system-ui, sans-serif;
-
-  --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.05);
-}
-
-/* ── Reset ─────────────────────────────────────────────── */
-*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
-
-/* ── Base ──────────────────────────────────────────────── */
-html { font-size: 16px; }
-
-body {
-  font-family: var(--font-body);
-  background: var(--bg);
-  color: var(--text-primary);
-  min-height: 100vh;
-  -webkit-font-smoothing: antialiased;
-}
-
-/* ── Layout ────────────────────────────────────────────── */
-#app {
-  max-width: 580px;
-  margin: 0 auto;
-  padding: 2rem 1.25rem 4rem;
-  display: flex;
-  flex-direction: column;
-  gap: 1.25rem;
-}
-
-/* ── Header ────────────────────────────────────────────── */
-.app-header {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  padding: 0 0.25rem;
-}
-
-.app-wordmark {
-  display: flex;
-  align-items: center;
-  gap: 0.5rem;
-  font-family: var(--font-display);
-  font-size: 1.1rem;
-  color: var(--text-primary);
-  letter-spacing: -0.01em;
-}
-
-/* ── Status bar ────────────────────────────────────────── */
-.status-bar {
-  display: flex;
-  align-items: center;
-  gap: 0.4rem;
-  font-size: 0.8rem;
-  color: var(--text-secondary);
-}
-
-.status-dot {
-  width: 6px;
-  height: 6px;
-  border-radius: 50%;
-  flex-shrink: 0;
-  transition: background 0.3s;
-}
-
-.status-dot.connecting { background: var(--text-muted); }
-.status-dot.ready      { background: var(--text-muted); }
-.status-dot.connected  { background: var(--success); }
-
-.status-divider { color: var(--text-muted); }
-
-/* ── Card ──────────────────────────────────────────────── */
-.app-card {
-  background: var(--surface);
-  border: 1px solid var(--border);
-  border-radius: var(--radius-lg);
-  box-shadow: var(--shadow-card);
-  overflow: hidden;
-}
-
-/* ── Poll Title ────────────────────────────────────────── */
-.poll-title-wrapper {
-  padding: 1.75rem 1.75rem 1.25rem;
-  border-bottom: 1px solid var(--border);
-}
-
-.poll-title-input {
-  width: 100%;
-  font-family: var(--font-display);
-  font-size: 1.5rem;
-  font-weight: 500;
-  color: var(--text-primary);
-  background: transparent;
-  border: none;
-  outline: none;
-  line-height: 1.3;
-  letter-spacing: -0.02em;
-}
-
-.poll-title-input::placeholder { color: var(--text-muted); }
-
-/* ── Add Option ────────────────────────────────────────── */
-.add-option-wrapper {
-  display: flex;
-  gap: 0.625rem;
-  padding: 1.25rem 1.75rem;
-  border-bottom: 1px solid var(--border);
-}
-
-.add-option-input {
-  flex: 1;
-  height: 2.5rem;
-  padding: 0 0.875rem;
-  font-family: var(--font-body);
-  font-size: 0.9rem;
-  color: var(--text-primary);
-  background: var(--bg);
-  border: 1px solid var(--border);
-  border-radius: var(--radius-sm);
-  outline: none;
-  transition: border-color 0.15s;
-}
-
-.add-option-input::placeholder { color: var(--text-muted); }
-.add-option-input:focus { border-color: var(--border-focus); }
-
-.add-option-input.shake {
-  animation: shake 0.3s ease;
-}
-
-@keyframes shake {
-  0%, 100% { transform: translateX(0); }
-  25%       { transform: translateX(-4px); }
-  75%       { transform: translateX(4px); }
-}
-
-.add-option-btn {
-  display: flex;
-  align-items: center;
-  gap: 0.375rem;
-  height: 2.5rem;
-  padding: 0 1rem;
-  font-family: var(--font-body);
-  font-size: 0.875rem;
-  font-weight: 500;
-  color: var(--accent-text);
-  background: var(--accent);
-  border: none;
-  border-radius: var(--radius-sm);
-  cursor: pointer;
-  transition: opacity 0.15s;
-  white-space: nowrap;
-}
-
-.add-option-btn:hover { opacity: 0.85; }
-.add-option-btn:active { opacity: 0.7; }
-
-/* ── Poll List ─────────────────────────────────────────── */
-.poll-list-wrapper {
-  padding: 0.5rem 0;
-}
-
-.poll-list-meta {
-  padding: 0.5rem 1.75rem 0.75rem;
-  font-size: 0.775rem;
-  color: var(--text-muted);
-  letter-spacing: 0.02em;
-  text-transform: uppercase;
-  font-weight: 500;
-}
-
-.poll-list-empty {
-  padding: 3rem 1.75rem;
-  text-align: center;
-  color: var(--text-muted);
-  font-size: 0.875rem;
-}
-
-.empty-icon {
-  margin-bottom: 0.75rem;
-  opacity: 0.6;
-}
-
-/* ── Poll Option ───────────────────────────────────────── */
-.poll-option {
-  position: relative;
-  overflow: hidden;
-  transition: background 0.15s;
-}
-
-.poll-option:hover {
-  background: var(--surface-hover);
-}
-
-.poll-option__bar {
-  position: absolute;
-  inset: 0 auto 0 0;
-  background: var(--vote-bar);
-  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
-  pointer-events: none;
-}
-
-.poll-option--voted .poll-option__bar {
-  background: var(--vote-bar-voted);
-}
-
-.poll-option__content {
-  position: relative;
-  display: flex;
-  align-items: center;
-  gap: 0.75rem;
-  padding: 0.875rem 1.75rem;
-}
-
-.poll-option__name {
-  flex: 1;
-  font-size: 0.9375rem;
-  font-weight: 400;
-  color: var(--text-primary);
-  word-break: break-word;
-}
-
-.poll-option--voted .poll-option__name {
-  font-weight: 500;
-}
-
-.poll-option__actions {
-  display: flex;
-  align-items: center;
-  gap: 0.625rem;
-  flex-shrink: 0;
-}
-
-.poll-option__pct {
-  font-size: 0.8125rem;
-  font-weight: 500;
-  color: var(--text-secondary);
-  min-width: 2.5rem;
-  text-align: right;
-}
-
-.poll-option__count {
-  font-size: 0.775rem;
-  color: var(--text-muted);
-  min-width: 3.5rem;
-}
-
-.poll-option__vote-btn {
-  height: 1.875rem;
-  padding: 0 0.875rem;
-  font-family: var(--font-body);
-  font-size: 0.8125rem;
-  font-weight: 500;
-  border-radius: var(--radius-sm);
-  cursor: pointer;
-  transition: all 0.15s;
-  white-space: nowrap;
-
-  background: transparent;
-  color: var(--text-secondary);
-  border: 1px solid var(--border);
-}
-
-.poll-option__vote-btn:hover {
-  border-color: var(--accent);
-  color: var(--accent);
-}
-
-.poll-option--voted .poll-option__vote-btn {
-  background: var(--accent);
-  color: var(--accent-text);
-  border-color: var(--accent);
-}
-
-.poll-option--voted .poll-option__vote-btn:hover {
-  opacity: 0.8;
-}
-
-.poll-option__delete-btn {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  width: 1.625rem;
-  height: 1.625rem;
-  background: transparent;
-  border: none;
-  border-radius: var(--radius-sm);
-  color: var(--text-muted);
-  cursor: pointer;
-  opacity: 0;
-  transition: opacity 0.15s, color 0.15s, background 0.15s;
-}
-
-.poll-option:hover .poll-option__delete-btn { opacity: 1; }
-.poll-option__delete-btn:hover {
-  color: var(--danger);
-  background: rgba(192, 57, 43, 0.07);
-}
-
-/* ── Footer ────────────────────────────────────────────── */
-.app-footer {
-  padding: 0 0.25rem;
-}
-
-/* ── Share Section ─────────────────────────────────────── */
-.share-section {
-  background: var(--surface);
-  border: 1px solid var(--border);
-  border-radius: var(--radius-lg);
-  box-shadow: var(--shadow-card);
-  padding: 1.25rem 1.5rem;
-}
-
-.share-label {
-  font-size: 0.775rem;
-  font-weight: 500;
-  color: var(--text-muted);
-  text-transform: uppercase;
-  letter-spacing: 0.05em;
-  margin-bottom: 0.625rem;
-}
-
-.share-row {
-  display: flex;
-  align-items: center;
-  gap: 0.625rem;
-}
-
-.share-url {
-  flex: 1;
-  font-family: 'DM Mono', 'Fira Mono', monospace;
-  font-size: 0.8rem;
-  color: var(--text-secondary);
-  background: var(--bg);
-  border: 1px solid var(--border);
-  border-radius: var(--radius-sm);
-  padding: 0.5rem 0.75rem;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-  display: block;
-  user-select: all;
-}
-
-.share-copy-btn {
-  height: 2rem;
-  padding: 0 0.875rem;
-  font-family: var(--font-body);
-  font-size: 0.8125rem;
-  font-weight: 500;
-  color: var(--text-secondary);
-  background: var(--surface);
-  border: 1px solid var(--border);
-  border-radius: var(--radius-sm);
-  cursor: pointer;
-  transition: all 0.15s;
-  white-space: nowrap;
-  flex-shrink: 0;
-}
-
-.share-copy-btn:hover {
-  border-color: var(--accent);
-  color: var(--accent);
-}
-
-.share-copy-btn--success {
-  color: var(--success) !important;
-  border-color: var(--success) !important;
-}
-
-/* ── Responsive ────────────────────────────────────────── */
-@media (max-width: 480px) {
-  #app { padding: 1rem 0.75rem 3rem; }
-
-  .poll-title-wrapper  { padding: 1.25rem 1.25rem 1rem; }
-  .add-option-wrapper  { padding: 1rem 1.25rem; }
-  .poll-option__content { padding: 0.875rem 1.25rem; }
-  .poll-list-meta      { padding: 0.5rem 1.25rem 0.625rem; }
-  .poll-list-empty     { padding: 2.5rem 1.25rem; }
-
-  .poll-option__count  { display: none; }
-
-  .share-section { padding: 1rem 1.25rem; }
-}
--- a/src/utils/store.js
+++ b/src/utils/store.js
@@ -1,79 +0,0 @@
-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;
-}
-
-// --- Room name from URL ---
-
-function getRoomName() {
-  const params = new URLSearchParams(window.location.search);
-  return params.get('room') || 'default-poll';
-}
-
-// --- Yjs setup ---
-
-export const peerId = getOrCreatePeerId();
-export const roomName = getRoomName();
-
-export const ydoc = new Y.Doc();
-export const provider = new WebrtcProvider(roomName, ydoc);
-export const yOptions = ydoc.getMap('poll-options');
-export const yTitle = ydoc.getText('poll-title');
-
-// --- Data operations ---
-
-export 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);
-}
-
-export 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);
-  }
-}
-
-export function deleteOption(optionId) {
-  yOptions.delete(optionId);
-}
-
-// --- Derived read helpers ---
-
-export function getEntries() {
-  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));
-  return entries;
-}
-
-export function getTotalVotes() {
-  let total = 0;
-  yOptions.forEach((optionMap) => {
-    total += optionMap.get('votes').size;
-  });
-  return total;
-}
--- a/utils.js
+++ b/utils.js
@@ -0,0 +1,291 @@
+/* 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))
+    }
+  }
+}
Author	SHA1	Message	Date
User	c89c6f95a6	cleanup (subfolder removed, npm packages removed, etc.); added y-websocket-server code	2026-03-16 02:27:53 +01:00
User	78d5352a48	implemented frontend including separate message system; started to implement backend	2026-03-10 17:30:43 +01:00