commit e018ebdb7a316dd0238c27f31aee0f09a878b11f
Author: Will0mane <100951314+Will0mane@users.noreply.github.com>
Date:   Mon Jun 1 23:07:37 2026 +0200

    initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c2658d7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules/
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..86a656b
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,780 @@
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+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..ca375ef
--- /dev/null
+++ b/package.json
@@ -0,0 +1,13 @@
+{
+  "name": "talkie",
+  "version": "1.0.0",
+  "description": "Browser-based walkie-talkie via WebRTC",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js"
+  },
+  "dependencies": {
+    "express": "^4.18.2",
+    "ws": "^8.16.0"
+  }
+}
diff --git a/public/app.js b/public/app.js
new file mode 100644
index 0000000..797e291
--- /dev/null
+++ b/public/app.js
@@ -0,0 +1,304 @@
+const STUN_CONFIG = { iceServers: [{ urls: 'stun:stun.l.google.com:19302' }] };
+
+let ws = null;
+let myId = null;
+let myName = '';
+let localStream = null;
+const peers = new Map(); // peerId -> RTCPeerConnection
+
+// --- DOM ---
+const joinScreen   = document.getElementById('join-screen');
+const talkieScreen = document.getElementById('talkie-screen');
+const inputName    = document.getElementById('input-name');
+const inputRoom    = document.getElementById('input-room');
+const btnJoin      = document.getElementById('btn-join');
+const btnLeave     = document.getElementById('btn-leave');
+const roomLabel    = document.getElementById('room-label');
+const peersList    = document.getElementById('peers-list');
+const pttBtn       = document.getElementById('ptt-btn');
+const btnLockMic   = document.getElementById('btn-lock-mic');
+const statusText   = document.getElementById('status-text');
+
+let micLocked = false;
+
+// --- JOIN ---
+btnJoin.addEventListener('click', joinRoom);
+inputRoom.addEventListener('keydown', e => { if (e.key === 'Enter') joinRoom(); });
+
+async function joinRoom() {
+  const name = inputName.value.trim() || 'Anonimo';
+  const room = inputRoom.value.trim().toUpperCase();
+  if (!room) { inputRoom.focus(); return; }
+
+  myName = name;
+
+  try {
+    localStream = await navigator.mediaDevices.getUserMedia({ audio: true, video: false });
+  } catch {
+    alert('Impossibile accedere al microfono. Controlla i permessi del browser.');
+    return;
+  }
+
+  // Mute microphone until PTT pressed
+  setMic(false);
+
+  connectWS(room, name);
+}
+
+// --- WEBSOCKET ---
+function connectWS(room, name) {
+  const proto = location.protocol === 'https:' ? 'wss' : 'ws';
+  ws = new WebSocket(`${proto}://${location.host}`);
+
+  ws.onopen = () => {
+    ws.send(JSON.stringify({ type: 'join', room, name }));
+    showTalkieScreen(room);
+  };
+
+  ws.onmessage = ({ data }) => {
+    const msg = JSON.parse(data);
+    handleSignal(msg);
+  };
+
+  ws.onclose = () => {
+    leaveRoom();
+  };
+}
+
+async function handleSignal(msg) {
+  switch (msg.type) {
+    case 'id':
+      myId = msg.id;
+      break;
+
+    case 'peers':
+      // Existing peers: I (new joiner) initiate offers to each
+      for (const peer of msg.peers) {
+        addPeerToUI(peer.id, peer.name);
+        await createOffer(peer.id);
+      }
+      break;
+
+    case 'peer-joined':
+      addPeerToUI(msg.id, msg.name);
+      // They will send us an offer; just prep the connection
+      getOrCreatePC(msg.id);
+      break;
+
+    case 'offer':
+      await handleOffer(msg.from, msg.sdp);
+      break;
+
+    case 'answer':
+      await peers.get(msg.from)?.setRemoteDescription(new RTCSessionDescription(msg.sdp));
+      break;
+
+    case 'ice':
+      try {
+        await peers.get(msg.from)?.addIceCandidate(new RTCIceCandidate(msg.candidate));
+      } catch {}
+      break;
+
+    case 'peer-left':
+      peers.get(msg.id)?.close();
+      peers.delete(msg.id);
+      removePeerFromUI(msg.id);
+      break;
+
+    case 'talking':
+      setPeerTalking(msg.id, msg.active);
+      break;
+  }
+}
+
+// --- WEBRTC ---
+function getOrCreatePC(peerId) {
+  if (peers.has(peerId)) return peers.get(peerId);
+
+  const pc = new RTCPeerConnection(STUN_CONFIG);
+  peers.set(peerId, pc);
+
+  // Add local tracks
+  localStream.getTracks().forEach(track => pc.addTrack(track, localStream));
+
+  // Remote audio
+  pc.ontrack = ({ streams }) => {
+    attachAudio(peerId, streams[0]);
+  };
+
+  // ICE candidates
+  pc.onicecandidate = ({ candidate }) => {
+    if (candidate) {
+      ws.send(JSON.stringify({ type: 'ice', to: peerId, candidate }));
+    }
+  };
+
+  pc.onconnectionstatechange = () => {
+    if (['failed', 'disconnected', 'closed'].includes(pc.connectionState)) {
+      peers.delete(peerId);
+    }
+  };
+
+  return pc;
+}
+
+async function createOffer(peerId) {
+  const pc = getOrCreatePC(peerId);
+  const offer = await pc.createOffer();
+  await pc.setLocalDescription(offer);
+  ws.send(JSON.stringify({ type: 'offer', to: peerId, sdp: pc.localDescription }));
+}
+
+async function handleOffer(peerId, sdp) {
+  const pc = getOrCreatePC(peerId);
+  await pc.setRemoteDescription(new RTCSessionDescription(sdp));
+  const answer = await pc.createAnswer();
+  await pc.setLocalDescription(answer);
+  ws.send(JSON.stringify({ type: 'answer', to: peerId, sdp: pc.localDescription }));
+}
+
+function attachAudio(peerId, stream) {
+  let audio = document.getElementById(`audio-${peerId}`);
+  if (!audio) {
+    audio = document.createElement('audio');
+    audio.id = `audio-${peerId}`;
+    audio.autoplay = true;
+    audio.style.display = 'none';
+    document.body.appendChild(audio);
+  }
+  audio.srcObject = stream;
+}
+
+// --- PTT ---
+function setMic(enabled) {
+  if (!localStream) return;
+  localStream.getAudioTracks().forEach(t => t.enabled = enabled);
+}
+
+function startTalking() {
+  if (micLocked) return;
+  setMic(true);
+  pttBtn.classList.add('active');
+  statusText.textContent = 'Stai trasmettendo...';
+  statusText.style.color = '#22c55e';
+  ws?.send(JSON.stringify({ type: 'talking', active: true }));
+}
+
+function stopTalking() {
+  if (micLocked) return;
+  setMic(false);
+  pttBtn.classList.remove('active');
+  statusText.textContent = 'Rilascia per ascoltare';
+  statusText.style.color = '';
+  ws?.send(JSON.stringify({ type: 'talking', active: false }));
+}
+
+function toggleMicLock() {
+  micLocked = !micLocked;
+  if (micLocked) {
+    setMic(true);
+    pttBtn.classList.add('active');
+    btnLockMic.classList.add('locked');
+    btnLockMic.querySelector('svg').innerHTML = `
+      <rect x="3" y="11" width="18" height="11" rx="2" ry="2"/>
+      <path d="M7 11V7a5 5 0 0 1 10 0v4"/>
+      <line x1="12" y1="15" x2="12" y2="17"/>
+    `;
+    btnLockMic.childNodes[2].textContent = ' Mic attivo — clicca per disattivare';
+    statusText.textContent = 'Microfono sempre attivo';
+    statusText.style.color = '#e05252';
+    ws?.send(JSON.stringify({ type: 'talking', active: true }));
+  } else {
+    setMic(false);
+    pttBtn.classList.remove('active');
+    btnLockMic.classList.remove('locked');
+    btnLockMic.querySelector('svg').innerHTML = `
+      <rect x="3" y="11" width="18" height="11" rx="2" ry="2"/>
+      <path d="M7 11V7a5 5 0 0 1 10 0v4"/>
+    `;
+    btnLockMic.childNodes[2].textContent = ' Microfono sempre attivo';
+    statusText.textContent = 'Rilascia per ascoltare';
+    statusText.style.color = '';
+    ws?.send(JSON.stringify({ type: 'talking', active: false }));
+  }
+}
+
+btnLockMic.addEventListener('click', toggleMicLock);
+
+// Mouse events
+pttBtn.addEventListener('mousedown', startTalking);
+pttBtn.addEventListener('mouseup', stopTalking);
+pttBtn.addEventListener('mouseleave', stopTalking);
+
+// Touch events (mobile)
+pttBtn.addEventListener('touchstart', e => { e.preventDefault(); startTalking(); }, { passive: false });
+pttBtn.addEventListener('touchend', e => { e.preventDefault(); stopTalking(); }, { passive: false });
+
+// Space bar shortcut
+document.addEventListener('keydown', e => {
+  if (e.code === 'Space' && !e.repeat && talkieScreen.classList.contains('active')) {
+    e.preventDefault();
+    startTalking();
+  }
+});
+document.addEventListener('keyup', e => {
+  if (e.code === 'Space' && talkieScreen.classList.contains('active')) {
+    stopTalking();
+  }
+});
+
+// --- UI ---
+function showTalkieScreen(room) {
+  joinScreen.classList.remove('active');
+  talkieScreen.classList.add('active');
+  roomLabel.textContent = `# ${room}`;
+  peersList.innerHTML = '';
+}
+
+function addPeerToUI(peerId, name) {
+  if (document.getElementById(`peer-${peerId}`)) return;
+  const initial = (name || '?')[0].toUpperCase();
+  const el = document.createElement('div');
+  el.className = 'peer-item';
+  el.id = `peer-${peerId}`;
+  el.innerHTML = `
+    <div class="peer-avatar">${initial}</div>
+    <span class="peer-name">${escapeHtml(name)}</span>
+    <span class="talking-badge">● parlando</span>
+  `;
+  peersList.appendChild(el);
+}
+
+function removePeerFromUI(peerId) {
+  document.getElementById(`peer-${peerId}`)?.remove();
+  document.getElementById(`audio-${peerId}`)?.remove();
+}
+
+function setPeerTalking(peerId, active) {
+  const el = document.getElementById(`peer-${peerId}`);
+  if (!el) return;
+  el.classList.toggle('talking', active);
+}
+
+function escapeHtml(str) {
+  return str.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
+}
+
+// --- LEAVE ---
+btnLeave.addEventListener('click', leaveRoom);
+
+function leaveRoom() {
+  ws?.close();
+  ws = null;
+  peers.forEach(pc => pc.close());
+  peers.clear();
+  localStream?.getTracks().forEach(t => t.stop());
+  localStream = null;
+  document.querySelectorAll('audio[id^="audio-"]').forEach(a => a.remove());
+
+  talkieScreen.classList.remove('active');
+  joinScreen.classList.add('active');
+  peersList.innerHTML = '';
+  if (micLocked) toggleMicLock();
+  stopTalking();
+}
diff --git a/public/index.html b/public/index.html
new file mode 100644
index 0000000..4f3b7d1
--- /dev/null
+++ b/public/index.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<html lang="it">
+<head>
+  <meta charset="UTF-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>Talkie</title>
+  <link rel="stylesheet" href="style.css" />
+</head>
+<body>
+
+  <!-- Join screen -->
+  <div id="join-screen" class="screen active">
+    <div class="logo">📻 Talkie</div>
+    <p class="subtitle">Walkie-talkie nel browser, gratis</p>
+    <div class="form">
+      <input id="input-name" type="text" placeholder="Il tuo nome" maxlength="20" autocomplete="off" />
+      <input id="input-room" type="text" placeholder="Codice stanza (es. ALFA)" maxlength="12" autocomplete="off" />
+      <button id="btn-join">Entra nella stanza</button>
+    </div>
+  </div>
+
+  <!-- Talkie screen -->
+  <div id="talkie-screen" class="screen">
+    <div class="header">
+      <span id="room-label"></span>
+      <button id="btn-leave">Esci</button>
+    </div>
+
+    <div id="peers-list"></div>
+
+    <div class="ptt-area">
+      <div id="status-text">Rilascia per ascoltare</div>
+      <button id="ptt-btn">
+        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+          <path d="M12 1a3 3 0 0 0-3 3v8a3 3 0 0 0 6 0V4a3 3 0 0 0-3-3z"/>
+          <path d="M19 10v2a7 7 0 0 1-14 0v-2"/>
+          <line x1="12" y1="19" x2="12" y2="23"/>
+          <line x1="8" y1="23" x2="16" y2="23"/>
+        </svg>
+        <span>Tieni premuto per parlare</span>
+      </button>
+      <button id="btn-lock-mic">
+        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+          <rect x="3" y="11" width="18" height="11" rx="2" ry="2"/>
+          <path d="M7 11V7a5 5 0 0 1 10 0v4"/>
+        </svg>
+        Microfono sempre attivo
+      </button>
+    </div>
+  </div>
+
+  <script src="app.js"></script>
+</body>
+</html>
diff --git a/public/style.css b/public/style.css
new file mode 100644
index 0000000..30eb64a
--- /dev/null
+++ b/public/style.css
@@ -0,0 +1,221 @@
+* { box-sizing: border-box; margin: 0; padding: 0; }
+
+body {
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+  background: #0f0f13;
+  color: #e8e8f0;
+  min-height: 100dvh;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.screen { display: none; width: 100%; max-width: 420px; padding: 24px; }
+.screen.active { display: flex; flex-direction: column; align-items: center; gap: 20px; }
+
+/* JOIN */
+.logo { font-size: 2.4rem; font-weight: 700; letter-spacing: -1px; }
+.subtitle { color: #888; font-size: 0.9rem; }
+
+.form {
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  width: 100%;
+}
+
+input {
+  width: 100%;
+  padding: 14px 16px;
+  border: 1.5px solid #2a2a3a;
+  border-radius: 12px;
+  background: #1a1a24;
+  color: #e8e8f0;
+  font-size: 1rem;
+  outline: none;
+  transition: border-color 0.2s;
+}
+input:focus { border-color: #5b5ef4; }
+input::placeholder { color: #555; }
+
+#btn-join {
+  padding: 14px;
+  background: #5b5ef4;
+  color: white;
+  border: none;
+  border-radius: 12px;
+  font-size: 1rem;
+  font-weight: 600;
+  cursor: pointer;
+  transition: background 0.2s, transform 0.1s;
+}
+#btn-join:hover { background: #4749d4; }
+#btn-join:active { transform: scale(0.98); }
+
+/* TALKIE */
+#talkie-screen.active {
+  flex-direction: column;
+  justify-content: space-between;
+  min-height: 100dvh;
+  padding: 24px;
+}
+
+.header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  width: 100%;
+}
+
+#room-label {
+  font-size: 1.1rem;
+  font-weight: 700;
+  color: #5b5ef4;
+  letter-spacing: 2px;
+}
+
+#btn-leave {
+  padding: 8px 14px;
+  background: transparent;
+  color: #888;
+  border: 1.5px solid #2a2a3a;
+  border-radius: 8px;
+  cursor: pointer;
+  font-size: 0.85rem;
+  transition: color 0.2s, border-color 0.2s;
+}
+#btn-leave:hover { color: #e05252; border-color: #e05252; }
+
+/* PEERS LIST */
+#peers-list {
+  width: 100%;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  flex: 1;
+  padding: 16px 0;
+}
+
+.peer-item {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 12px 16px;
+  background: #1a1a24;
+  border-radius: 12px;
+  border: 1.5px solid #2a2a3a;
+  transition: border-color 0.2s;
+}
+
+.peer-item.talking {
+  border-color: #22c55e;
+  background: #0d1f14;
+}
+
+.peer-avatar {
+  width: 38px;
+  height: 38px;
+  border-radius: 50%;
+  background: #2a2a3a;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 1.1rem;
+  font-weight: 700;
+  color: #5b5ef4;
+  flex-shrink: 0;
+}
+
+.peer-item.talking .peer-avatar {
+  background: #22c55e22;
+  color: #22c55e;
+}
+
+.peer-name { font-size: 0.95rem; font-weight: 500; }
+
+.talking-badge {
+  margin-left: auto;
+  font-size: 0.75rem;
+  color: #22c55e;
+  font-weight: 600;
+  opacity: 0;
+  transition: opacity 0.2s;
+}
+.peer-item.talking .talking-badge { opacity: 1; }
+
+/* PTT */
+.ptt-area {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 16px;
+  padding-bottom: 16px;
+  width: 100%;
+}
+
+#status-text {
+  font-size: 0.85rem;
+  color: #666;
+  transition: color 0.2s;
+}
+
+#ptt-btn {
+  width: 160px;
+  height: 160px;
+  border-radius: 50%;
+  background: #1a1a24;
+  border: 3px solid #2a2a3a;
+  color: #888;
+  cursor: pointer;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 10px;
+  transition: all 0.15s;
+  user-select: none;
+  -webkit-user-select: none;
+  touch-action: none;
+}
+
+#ptt-btn svg { width: 44px; height: 44px; }
+#ptt-btn span { font-size: 0.75rem; font-weight: 500; text-align: center; line-height: 1.3; }
+
+#ptt-btn:hover { border-color: #5b5ef4; color: #5b5ef4; }
+
+#ptt-btn.active {
+  background: #22c55e18;
+  border-color: #22c55e;
+  color: #22c55e;
+  transform: scale(1.05);
+  box-shadow: 0 0 32px #22c55e44;
+}
+
+#ptt-btn.active span::before { content: 'Stai trasmettendo'; }
+#ptt-btn:not(.active) span::before { content: 'Tieni premuto per parlare'; }
+#ptt-btn span { font-size: 0; }
+#ptt-btn span::before { font-size: 0.75rem; }
+
+#btn-lock-mic {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 10px 20px;
+  background: transparent;
+  border: 1.5px solid #2a2a3a;
+  border-radius: 24px;
+  color: #888;
+  font-size: 0.85rem;
+  font-weight: 500;
+  cursor: pointer;
+  transition: all 0.2s;
+  user-select: none;
+}
+#btn-lock-mic svg { width: 16px; height: 16px; flex-shrink: 0; }
+#btn-lock-mic:hover { border-color: #5b5ef4; color: #5b5ef4; }
+#btn-lock-mic.locked {
+  background: #e05252;
+  border-color: #e05252;
+  color: white;
+}
+#btn-lock-mic.locked:hover { background: #c04040; border-color: #c04040; }
diff --git a/server.js b/server.js
new file mode 100644
index 0000000..604552e
--- /dev/null
+++ b/server.js
@@ -0,0 +1,81 @@
+const express = require('express');
+const { WebSocketServer } = require('ws');
+const { randomUUID } = require('crypto');
+const path = require('path');
+
+const app = express();
+app.use(express.static(path.join(__dirname, 'public')));
+
+const server = app.listen(3000, () => {
+  console.log('Talkie running on http://localhost:3000');
+});
+
+const wss = new WebSocketServer({ server });
+
+// roomId -> Set of { ws, id, name }
+const rooms = new Map();
+
+function getRoomMembers(roomId) {
+  return rooms.get(roomId) ?? new Set();
+}
+
+function broadcast(roomId, data, excludeId = null) {
+  const msg = JSON.stringify(data);
+  getRoomMembers(roomId).forEach(client => {
+    if (client.id !== excludeId && client.ws.readyState === 1) {
+      client.ws.send(msg);
+    }
+  });
+}
+
+wss.on('connection', (ws) => {
+  const clientId = randomUUID();
+  let clientRoom = null;
+  let clientName = 'Anonimo';
+
+  ws.send(JSON.stringify({ type: 'id', id: clientId }));
+
+  ws.on('message', (raw) => {
+    let msg;
+    try { msg = JSON.parse(raw); } catch { return; }
+
+    if (msg.type === 'join') {
+      clientRoom = msg.room.trim().toUpperCase();
+      clientName = (msg.name || 'Anonimo').slice(0, 20);
+
+      if (!rooms.has(clientRoom)) rooms.set(clientRoom, new Set());
+      const room = rooms.get(clientRoom);
+
+      // Tell new user about existing peers
+      const peers = [...room].map(c => ({ id: c.id, name: c.name }));
+      ws.send(JSON.stringify({ type: 'peers', peers }));
+
+      // Tell existing peers about the new user
+      broadcast(clientRoom, { type: 'peer-joined', id: clientId, name: clientName });
+
+      room.add({ ws, id: clientId, name: clientName });
+    }
+
+    // WebRTC signaling: forward to specific peer
+    if (['offer', 'answer', 'ice'].includes(msg.type)) {
+      const room = getRoomMembers(clientRoom);
+      const target = [...room].find(c => c.id === msg.to);
+      if (target?.ws.readyState === 1) {
+        target.ws.send(JSON.stringify({ ...msg, from: clientId }));
+      }
+    }
+
+    // Talking state: broadcast to room
+    if (msg.type === 'talking') {
+      broadcast(clientRoom, { type: 'talking', id: clientId, name: clientName, active: msg.active }, clientId);
+    }
+  });
+
+  ws.on('close', () => {
+    if (!clientRoom) return;
+    const room = getRoomMembers(clientRoom);
+    room.forEach(c => { if (c.id === clientId) room.delete(c); });
+    broadcast(clientRoom, { type: 'peer-left', id: clientId, name: clientName });
+    if (room.size === 0) rooms.delete(clientRoom);
+  });
+});