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ytplayer/frontend/watch-party-client.js

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/* Lazy classic chunk; its executing singleton stays pinned until reload. */
(window.YT ||= {}).Party = (() => {
const noop = { boot() {}, guestActive: () => false, intercept: () => false, afterLoad() {} };
if (!WEB || typeof WebSocket === 'undefined') return noop;
const PID_KEY = 'ytpPartyPid', HOST_KEY = 'ytpPartyHost', NAME_KEY = 'ytpPartyName';
const ls = {
get: (k) => { try { return localStorage.getItem(k); } catch { return null; } },
set: (k, v) => { try { if (v == null) localStorage.removeItem(k); else localStorage.setItem(k, v); } catch { /* blocked */ } },
};
let pid = ls.get(PID_KEY);
if (!pid) { pid = 'p' + Math.random().toString(36).slice(2, 12) + Date.now().toString(36); ls.set(PID_KEY, pid); }
const wsUrl = (q) => `${location.protocol === 'https:' ? 'wss' : 'ws'}://${location.host}/ws/party?${new URLSearchParams(q)}`;
const st = {
ws: null, role: null, code: '', secret: '', name: '', members: [], chat: [], state: null, offset: 0,
dj: { enabled: false, entries: [] }, djPending: false,
allowControl: false, quietUntil: 0, detached: false, retry: null, pushTimer: null, driftTimer: null, lastPush: '',
voice: { on: false, stream: null, muted: false, pcs: new Map(), audios: new Map() },
minimized: false,
};
const inParty = () => !!st.role;
const isHost = () => st.role === 'host';
const guestActive = () => st.role === 'guest' && !st.detached;
const send = (m) => { if (st.ws && st.ws.readyState === 1) st.ws.send(JSON.stringify(m)); };
const serverNow = () => Date.now() + st.offset;
const myName = () => st.name || (data.profile && data.profile.name) || ls.get(NAME_KEY) || '';
// ---------- connection ----------
function connect() {
clearTimeout(st.retry);
const q = { role: st.role, pid, name: myName() || 'Guest' };
if (st.code) q.code = st.code;
if (isHost() && st.secret) q.secret = st.secret;
const ws = new WebSocket(wsUrl(q));
st.ws = ws;
ws.onmessage = (e) => { let m; try { m = JSON.parse(e.data); } catch { return; } onMessage(m); };
ws.onclose = (e) => {
if (st.ws !== ws) return;
st.ws = null;
if (!inParty()) return;
if (e.code === 4010 || e.code === 4004 || e.code === 4003) {
const why = e.code === 4004 ? 'That party code doesn’t exist (or has ended).' : e.code === 4003 ? 'This party belongs to another host.' : 'The party ended.';
leave(false);
toast(`🎉 ${why}`, { duration: 5000 });
return;
}
setStatus('Reconnecting…');
st.retry = setTimeout(connect, 3000);
};
ws.onerror = () => { if (!st.code && isHost()) setStatus('Could not reach the server'); };
}
function onMessage(m) {
DirectMedia.attach('party', { send, peers: () => st.members.filter(m => m.pid !== pid).map(m => ({ id: m.pid, name: m.name, files: m.host && st.state?.directAvailable && st.state?.v ? [st.state.v.id] : [] })) });
if (m.type === 'direct') { DirectMedia.handle('party', m); return; }
if (m.type === 'hello') {
st.code = m.code;
if (m.secret) { st.secret = m.secret; ls.set(HOST_KEY, JSON.stringify({ code: m.code, secret: m.secret })); }
st.offset = (m.now || Date.now()) - Date.now();
st.members = m.members || [];
st.chat = m.chat || [];
st.dj = m.dj || { enabled: false, entries: [] }; st.djPending = false;
st.allowControl = !!m.allowControl;
setStatus(isHost() ? 'You’re hosting' : 'Synced with the host');
render();
if (isHost()) pushState(true);
else if (m.state) applyState(m.state);
if (st.voice.on) { send({ type: 'voice', on: true }); connectVoicePeers(); }
} else if (m.type === 'dj') {
st.dj = { enabled: m.enabled, entries: m.entries || [] }; render();
} else if (m.type === 'dj-play' && isHost()) {
st.djPending = false; if (m.video) { Player._handoff = null; playVideoAt(m.video); } else { st.dj.entries = st.dj.entries.filter(e => !e.approved); advanceQueue(); }
} else if (m.type === 'state') {
st.state = m.state;
if (st.role === 'guest') applyState(m.state);
} else if (m.type === 'members') {
st.members = m.members || [];
if (m.joined) sysMsg(`${m.joined} joined`);
if (m.left) sysMsg(`${m.left} left${m.hostAway ? ' — waiting for the host to come back' : ''}`);
render();
syncVoicePeers();
} else if (m.type === 'chat') {
st.chat.push(m.msg);
if (st.chat.length > 100) st.chat.shift();
renderChat();
if (m.msg.pid !== pid && (st.minimized || $('partyPanel').classList.contains('hidden'))) toast(`💬 ${m.msg.from}: ${m.msg.text}`);
} else if (m.type === 'settings') {
st.allowControl = !!m.allowControl;
render();
if (!isHost()) sysMsg(st.allowControl ? 'The host lets everyone control playback' : 'Only the host controls playback now');
} else if (m.type === 'cmd' && isHost()) {
runCommand(m);
} else if (m.type === 'rtc') {
onRtc(m.from, m.data);
} else if (m.type === 'ended') {
toast(`🎉 ${m.reason || 'The party ended'}`, { duration: 5000 });
}
}
// ---------- host: broadcast ----------
function stateNow() {
const meta = current && current.meta;
const M = Player.master;
return {
directAvailable: !!meta && cachedIds.has(meta.id) && DirectMedia.enabled() && data.settings.p2pShare !== false,
v: meta ? { id: meta.id, title: meta.title || '', channel: meta.channel || '', thumbnail: meta.thumbnail || '', duration: meta.duration || 0 } : null,
cur: M ? M.currentTime || 0 : 0,
paused: !M || M.paused,
rate: (M && M.playbackRate) || 1,
};
}
function pushState(force = false) {
if (!isHost() || !st.ws) return;
const s = stateNow();
const key = JSON.stringify({ ...s, cur: Math.round(s.cur) });
if (!force && key === st.lastPush) return;
st.lastPush = key;
send({ type: 'state', state: s });
}
function runCommand(m) {
switch (m.cmd) {
case 'toggle': Player.toggle(); break;
case 'play': Player.play(); break;
case 'pause': Player.pause(); break;
case 'seek': if (Number.isFinite(Number(m.t))) Player.seek(Math.max(0, Number(m.t))); break;
case 'next': playNext(); break;
case 'prev': playPrev(); break;
default: return;
}
toast(`🎉 ${m.from}: ${m.cmd === 'seek' ? `jumped to ${fmtTime(Number(m.t))}` : m.cmd}`);
setTimeout(() => pushState(true), 200);
}
// ---------- guest: follow ----------
const quiet = (ms = 1500) => { st.quietUntil = Date.now() + ms; };
function targetTime(s) {
if (!s) return 0;
return s.paused ? s.cur : s.cur + ((serverNow() - (s.ts || serverNow())) / 1000) * (s.rate || 1);
}
async function applyState(s) {
st.state = s;
if (st.role !== 'guest' || st.detached || !s || !s.v) { render(); return; }
const target = targetTime(s);
if (!current || !current.meta || current.meta.id !== s.v.id) {
quiet(6000);
await playVideoAt({ ...s.v }, target);
return;
}
const M = Player.master;
if (!M) return;
if ((M.playbackRate || 1) !== (s.rate || 1)) { els.speed.value = String(s.rate || 1); Player.applySpeed(); }
if (Math.abs((M.currentTime || 0) - target) > 1.5) { quiet(); Player.seek(target); }
if (s.paused && !M.paused) { quiet(); Player.pause(); updatePlayBtn(); }
else if (!s.paused && M.paused) { quiet(); Player.play(); updatePlayBtn(); }
}
// A guest's own actions: forwarded when allowed, else they go off sync.
function onLocalAction(kind) {
if (st.role !== 'guest' || st.detached || Date.now() < st.quietUntil) return;
if (st.allowControl) {
const M = Player.master;
if (kind === 'seeked') send({ type: 'cmd', cmd: 'seek', t: M.currentTime });
else send({ type: 'cmd', cmd: kind === 'pause' ? 'pause' : 'play' });
return;
}
st.detached = true;
setStatus('Off sync — you paused or skipped on your own');
render();
}
// playNext/playPrev guard: guests don't change songs themselves.
function intercept(cmd) {
if (st.role !== 'guest' || st.detached) return false;
if (st.allowControl) send({ type: 'cmd', cmd });
else toast('🎉 The host picks the songs in a watch party');
return true;
}
function resync() {
st.detached = false;
setStatus('Synced with the host');
render();
applyState(st.state);
}
// ---------- voice (WebRTC mesh) ----------
const ICE = [{ urls: 'stun:stun.l.google.com:19302' }, { urls: 'stun:stun1.l.google.com:19302' }];
function peer(other) {
let pc = st.voice.pcs.get(other);
if (pc) return pc;
pc = new RTCPeerConnection({ iceServers: ICE });
st.voice.pcs.set(other, pc);
if (st.voice.stream) st.voice.stream.getTracks().forEach((t) => pc.addTrack(t, st.voice.stream));
pc.onicecandidate = (e) => { if (e.candidate) send({ type: 'rtc', to: other, data: { ice: e.candidate } }); };
pc.ontrack = (e) => {
let a = st.voice.audios.get(other);
if (!a) { a = new Audio(); a.autoplay = true; a.setAttribute('playsinline', ''); st.voice.audios.set(other, a); }
a.srcObject = e.streams[0];
a.play().catch(() => {});
};
pc.onconnectionstatechange = () => { if (['failed', 'closed'].includes(pc.connectionState)) dropPeer(other); render(); };
return pc;
}
function dropPeer(other) {
const pc = st.voice.pcs.get(other);
if (pc) { try { pc.close(); } catch { /* closed */ } st.voice.pcs.delete(other); }
const a = st.voice.audios.get(other);
if (a) { a.srcObject = null; st.voice.audios.delete(other); }
}
async function offerTo(other) {
const pc = peer(other);
const offer = await pc.createOffer();
await pc.setLocalDescription(offer);
send({ type: 'rtc', to: other, data: { sdp: pc.localDescription } });
}
async function onRtc(from, d) {
if (!st.voice.on || !d) return;
try {
if (d.sdp) {
const pc = peer(from);
await pc.setRemoteDescription(d.sdp);
if (d.sdp.type === 'offer') {
const ans = await pc.createAnswer();
await pc.setLocalDescription(ans);
send({ type: 'rtc', to: from, data: { sdp: pc.localDescription } });
}
} else if (d.ice) {
await peer(from).addIceCandidate(d.ice);
}
} catch { /* a glare/ICE hiccup — the next members update retries */ }
}
// The member with the smaller pid makes the offer, so each pair connects once.
function connectVoicePeers() {
if (!st.voice.on) return;
for (const m of st.members) if (m.voice && m.pid !== pid && !st.voice.pcs.has(m.pid) && pid < m.pid) offerTo(m.pid).catch(() => {});
}
function syncVoicePeers() {
const voiced = new Set(st.members.filter((m) => m.voice).map((m) => m.pid));
for (const other of [...st.voice.pcs.keys()]) if (!voiced.has(other)) dropPeer(other);
connectVoicePeers();
}
async function toggleVoice() {
if (st.voice.on) {
st.voice.on = false;
for (const other of [...st.voice.pcs.keys()]) dropPeer(other);
if (st.voice.stream) st.voice.stream.getTracks().forEach((t) => t.stop());
st.voice.stream = null;
send({ type: 'voice', on: false });
render();
return;
}
if (!navigator.mediaDevices || !navigator.mediaDevices.getUserMedia || typeof RTCPeerConnection === 'undefined') { toast('Voice chat isn’t supported in this browser'); return; }
try {
st.voice.stream = await navigator.mediaDevices.getUserMedia({ audio: { echoCancellation: true, noiseSuppression: true, autoGainControl: true } });
} catch (e) {
toast('🎤 Microphone blocked: ' + (e.message || e.name));
return;
}
st.voice.on = true;
st.voice.muted = false;
send({ type: 'voice', on: true });
toast('🎤 Voice on — headphones stop the music echoing into your mic', { duration: 5000 });
render();
connectVoicePeers();
}
function toggleMute() {
if (!st.voice.stream) return;
st.voice.muted = !st.voice.muted;
st.voice.stream.getAudioTracks().forEach((t) => { t.enabled = !st.voice.muted; });
render();
}
// ---------- lifecycle ----------
function start() {
st.role = 'host';
st.code = ''; st.secret = ''; st.chat = []; st.members = [];
ls.set(HOST_KEY, null);
showPanel();
setStatus('Starting…');
connect();
beginTimers();
}
function join(code, name) {
code = String(code || '').toUpperCase().replace(/[^A-Z0-9]/g, '');
if (code.length !== 6) { toast('Party codes have 6 letters/numbers'); return; }
if (name) { st.name = name; ls.set(NAME_KEY, name); }
st.role = 'guest';
st.code = code; st.detached = false; st.chat = []; st.members = [];
showPanel();
setStatus('Joining…');
connect();
beginTimers();
}
function beginTimers() {
clearInterval(st.pushTimer); clearInterval(st.driftTimer);
st.pushTimer = setInterval(() => pushState(), 3000);
st.driftTimer = setInterval(() => { if (st.role === 'guest' && st.state && !st.detached) applyState(st.state); }, 2500);
}
function leave(sendEnd = true) {
if (isHost() && sendEnd) send({ type: 'end' });
if (st.voice.on) toggleVoice();
const ws = st.ws;
st.ws = null;
st.role = null; st.code = ''; st.secret = '';
clearTimeout(st.retry); clearInterval(st.pushTimer); clearInterval(st.driftTimer);
try { if (ws) ws.close(); } catch { /* gone */ }
ls.set(HOST_KEY, null);
$('partyPanel').classList.add('hidden');
render();
}
// ---------- UI ----------
// Lyrics-instead-of-video is a per-device view: each guest chooses it for
// themselves, and the host's playback is untouched (the video keeps playing
// behind the lyrics, so sync and audio carry on).
const lyricsOn = () => !!(Notes.stageLyrics && Notes.stageLyrics.on());
function renderLyricsToggle() {
const b = document.querySelector('#partyPanel .pt-lyrics');
if (!b) return;
b.textContent = lyricsOn() ? '📺 Show the video' : '🎤 Lyrics instead of video';
b.classList.toggle('on', lyricsOn());
}
function setStatus(t) { const el = $('ptStatus'); if (el) el.textContent = t; }
function sysMsg(text) { st.chat.push({ sys: true, text, at: Date.now() }); renderChat(); }
function link() { return `${location.origin}/?party=${st.code}`; }
function showPanel() { Lazy.load('feature:party-dj').then(render).catch(error=>toast(error.message)); Lazy.load('feature:direct').catch(error=>toast(error.message)); $('partyPanel').classList.remove('hidden'); st.minimized = false; $('partyPanel').classList.remove('min'); render(); }
function render() {
const panel = $('partyPanel');
const chip = $('navPartyBtn');
if (chip) {
const label = chip.querySelector('.nav-label');
if (label) label.textContent = inParty() ? `Party · ${st.members.length}` : 'Watch party';
else chip.textContent = inParty() ? `🎉 Party · ${st.members.length}` : '🎉 Watch party';
}
if (!panel || panel.classList.contains('hidden')) return;
const nameOk = !!myName();
if (!inParty()) {
panel.querySelector('.pt-body').innerHTML = `
<p class="modal-text">Watch together: everyone's player follows the host, with chat and optional voice.</p>
${nameOk ? '' : '<label class="pt-row">Your name <input class="pt-name" maxlength="40" placeholder="e.g. Rex" /></label>'}
<button class="rv-primary" type="button" data-act="start">Start a party</button>
<div class="pt-or">or join one</div>
<div class="pt-row"><input class="pt-code" maxlength="7" placeholder="CODE" autocapitalize="characters" /><button class="np-btn" type="button" data-act="join">Join</button></div>`;
$('ptTitle').textContent = '🎉 Watch party';
setStatus('');
return;
}
$('ptTitle').textContent = `🎉 Party ${st.code || '…'}`;
const s = st.state && st.state.v;
panel.querySelector('.pt-body').innerHTML = `
${st.code ? `<div class="pt-share"><code>${escapeHtml(link())}</code><button class="np-btn" type="button" data-act="copy">Copy</button>${navigator.share ? '<button class="np-btn" type="button" data-act="share">↗</button>' : ''}</div>` : ''}
${!isHost() && s ? `<div class="pt-now">▶ ${escapeHtml(s.title)}</div>` : ''}
${!isHost() && st.detached ? '<button class="rv-primary" type="button" data-act="resync">↻ Re-sync with the host</button>' : ''}
<div class="pt-members">${st.members.map((m) => `<span class="pt-member${m.pid === pid ? ' me' : ''}">${m.host ? '👑 ' : ''}${escapeHtml(m.name)}${m.voice ? ' 🎤' : ''}</span>`).join('')}</div>
${isHost() ? `<label class="pt-toggle"><input type="checkbox" data-act="allow" ${st.allowControl ? 'checked' : ''} /> Guests can control playback</label>` : ''}
<button class="np-btn pt-lyrics${lyricsOn() ? ' on' : ''}" type="button" data-act="lyrics">${lyricsOn() ? '📺 Show the video' : '🎤 Lyrics instead of video'}</button>
<div class="pt-voice">
<button class="np-btn${st.voice.on ? ' on' : ''}" type="button" data-act="voice">${st.voice.on ? '🎤 Leave voice' : '🎤 Join voice'}</button>
${st.voice.on ? `<button class="np-btn" type="button" data-act="mute">${st.voice.muted ? '🔇 Unmute' : '🔈 Mute'}</button>` : ''}
<span class="pt-voice-n">${st.voice.on ? `${st.voice.pcs.size} connected` : ''}</span>
</div>
<div class="pt-chat" id="ptChat"></div>
<form class="pt-send"><input class="pt-msg" maxlength="500" placeholder="Message…" autocomplete="off" /><button class="np-btn" type="submit">Send</button></form>
<button class="pt-leave" type="button" data-act="leave">${isHost() ? 'End the party' : 'Leave the party'}</button>`;
const dj = document.createElement('div'); panel.querySelector('.pt-body').append(dj);
if (Lazy.loaded('feature:party-dj')) PartyDJ.render(dj, { state: st.dj, host: isHost(), pid, send, search: async q => { const result = await API.search(q); return result.results || result.videos || []; } });
renderChat();
}
function renderChat() {
const box = $('ptChat');
if (!box) return;
box.innerHTML = st.chat.map((c) => c.sys
? `<div class="pt-sys">${escapeHtml(c.text)}</div>`
: `<div class="pt-line${c.pid === pid ? ' me' : ''}"><b>${escapeHtml(c.from)}</b> ${escapeHtml(c.text)}</div>`).join('');
box.scrollTop = box.scrollHeight;
}
function open() {
const panel = $('partyPanel');
if (typeof closeSidebar === 'function') { try { closeSidebar(); } catch { /* not open */ } }
if (panel.classList.contains('hidden')) showPanel();
else if (st.minimized) { st.minimized = false; panel.classList.remove('min'); }
else if (!inParty()) panel.classList.add('hidden');
else { st.minimized = true; panel.classList.add('min'); }
}
function bindUi() {
const panel = $('partyPanel');
$('ptMin').addEventListener('click', () => {
if (!inParty()) { panel.classList.add('hidden'); return; }
st.minimized = !st.minimized;
panel.classList.toggle('min', st.minimized);
});
panel.addEventListener('keydown', (e) => e.stopPropagation());
panel.addEventListener('click', async (e) => {
const a = e.target.closest('[data-act]');
if (!a || a.tagName === 'INPUT') return;
const act = a.dataset.act;
const nameIn = panel.querySelector('.pt-name');
const name = nameIn ? nameIn.value.trim() : '';
if ((act === 'start' || act === 'join') && !myName() && !name) { toast('Enter your name first'); if (nameIn) nameIn.focus(); return; }
if (name) { st.name = name; ls.set(NAME_KEY, name); }
if (act === 'start') start();
else if (act === 'join') join(panel.querySelector('.pt-code').value);
else if (act === 'copy') { try { await navigator.clipboard.writeText(link()); toast('Party link copied ✓'); } catch { toast('Copy blocked'); } }
else if (act === 'share') { try { await navigator.share({ title: 'Join my watch party', url: link() }); } catch { /* dismissed */ } }
else if (act === 'resync') resync();
else if (act === 'voice') toggleVoice();
else if (act === 'mute') toggleMute();
else if (act === 'lyrics') { Notes.stageLyrics.set(!lyricsOn()); renderLyricsToggle(); }
else if (act === 'leave') leave(true);
});
panel.addEventListener('change', (e) => {
if (e.target.dataset.act === 'allow') { st.allowControl = e.target.checked; send({ type: 'settings', allowControl: st.allowControl }); }
});
panel.addEventListener('submit', (e) => {
e.preventDefault();
const input = panel.querySelector('.pt-msg');
const text = input.value.trim();
if (text) { send({ type: 'chat', text }); input.value = ''; }
});
// Host: push on every player change; guests: detect their own actions.
['play', 'pause', 'seeked', 'ratechange', 'loadedmetadata'].forEach((ev) => {
[els.video, els.audio].forEach((el) => el.addEventListener(ev, (e) => {
if (el !== Player.master) return;
if (isHost()) pushState(true);
else if (ev === 'play' || ev === 'pause' || ev === 'seeked') onLocalAction(ev);
}));
});
}
function boot() {
bindUi();
render();
// Resume hosting after a reload.
try {
const h = JSON.parse(ls.get(HOST_KEY) || 'null');
if (h && h.code && h.secret) { st.role = 'host'; st.code = h.code; st.secret = h.secret; showPanel(); connect(); beginTimers(); }
} catch { /* none */ }
let code = '';
try { code = (new URLSearchParams(location.search).get('party') || '').toUpperCase(); } catch { /* no URL */ }
if (code) {
try { const u = new URL(location.href); u.searchParams.delete('party'); history.replaceState(null, '', u.pathname + u.search + u.hash); } catch { /* keep */ }
if (myName()) join(code);
else { showPanel(); const c = $('partyPanel').querySelector('.pt-code'); if (c) c.value = code; toast('Enter your name, then tap Join'); }
}
}
return {
nextDJ: () => { if (!isHost() || !st.dj.enabled || !st.dj.entries.some(e => e.approved)) return false; if (!st.djPending) { st.djPending = true; send({ type: 'dj', action: 'take' }); } return true; },
open, boot, guestActive, intercept, renderLyricsToggle, afterLoad: () => pushState(true),
state: () => ({
role: st.role, code: st.code, detached: st.detached, members: st.members.length, voice: st.voice.on,
peers: st.voice.pcs.size, peerStates: [...st.voice.pcs.values()].map((pc) => pc.connectionState),
remoteAudio: [...st.voice.audios.values()].filter((a) => a.srcObject && a.srcObject.getAudioTracks().some((t) => t.readyState === 'live')).length,
chat: st.chat.length, allowControl: st.allowControl,
}),
_join: join, _start: start,
};
})();