Guest page: hear yourself, clearer mute, 'What is happening' log

Ideas taken from CurryCaster's guest page:
- 'Hear yourself' plays the guest's own mic in their headphones
  (refused when the headphones box is unticked - it would feed back)
- Mute shows a clear 'the show cannot hear you' state
- 'What is happening' log: connection events plus stats every 15 s in
  both directions (kb/s, loss, jitter, buffer, concealment, round trip,
  candidate types). Never includes IP addresses. Kept in the page only;
  the guest presses Copy and sends it to the host.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/static/guest.js

@@ -3,6 +3,28 @@ const token = location.pathname.split('/').filter(Boolean)[1] || '';
 const log = $('#log');
 let ws = null, everOpen = false, finished = false;
 let pc = null, stream = null, actx = null, micAn = null, showAn = null, muted = false;
+let micSrc = null, selfGain = null;
+
+// ---- "What is happening" log: kept in this page only, copied by the guest on request.
+const diagLines = [];
+function note(msg){
+  const line = new Date().toLocaleTimeString([], {hour12:false}) + '  ' + msg;
+  diagLines.push(line); if (diagLines.length > 400) diagLines.shift();
+  const el = $('#diaglog'); if (!el) return;
+  const atBottom = el.scrollHeight - el.scrollTop - el.clientHeight < 30;
+  el.textContent = diagLines.join('\n');
+  if (atBottom) el.scrollTop = el.scrollHeight;
+}
+function diagReport(){
+  const head = [
+    'MMO Guest Line - what is happening',
+    'copied ' + new Date().toString(),
+    'browser: ' + navigator.userAgent,
+    'name: ' + ($('#name').value.trim() || 'Guest') + ' | headphones ticked: ' + $('#headphones').checked,
+    '',
+  ];
+  return head.concat(diagLines).join('\n');
+}
 
 function fatal(msg){
   finished = true;
@@ -16,12 +38,13 @@ function send(o){ if (ws && ws.readyState === 1) ws.send(JSON.stringify(o)); }
 function connect(){
   ws = new WebSocket(wsURL('/ws?t=' + encodeURIComponent(token)));
   ws.onopen = () => {
-    everOpen = true;
+    everOpen = true; note('host connection: open');
     $('#conn').textContent = 'connected'; $('#conn').className = 'pill ok';
     const n = $('#name').value.trim(); if (n) send({t:'name', name:n});
   };
   ws.onclose = () => {
     if (finished) return;
+    note('host connection: closed' + (everOpen ? ' - reconnecting in 2 s' : ''));
     if (!everOpen) { fatal('This invite link is not active. Ask the host for a new one.'); return; }
     $('#conn').textContent = 'reconnecting…'; $('#conn').className = 'pill bad';
     setTimeout(connect, 2000);
@@ -34,9 +57,9 @@ function connect(){
       case 'chat': renderMsg(log, m.msg, 'guest'); if (document.hidden && m.msg.who === 'host') flashTitle(); break;
       case 'notice': renderMsg(log, {who:'system', text:m.text, ts:Date.now()}, 'guest'); break;
       case 'answer': if (pc) await pc.setRemoteDescription({type:'answer', sdp:m.sdp}); break;
-      case 'error': $('#callstate').textContent = m.text; hangup(false); break;
-      case 'callended': hangup(false); $('#callstate').textContent = 'The host ended the audio. You can join again.'; break;
-      case 'ended': fatal(m.reason || 'The session has ended.'); break;
+      case 'error': note('host error: ' + m.text); $('#callstate').textContent = m.text; hangup(false); break;
+      case 'callended': note('host ended the audio'); hangup(false); $('#callstate').textContent = 'The host ended the audio. You can join again.'; break;
+      case 'ended': note('session ended: ' + (m.reason || '')); fatal(m.reason || 'The session has ended.'); break;
     }
   };
 }
@@ -68,7 +91,10 @@ $('#mic').onchange = () => store('gl_mic', $('#mic').value);
 $('#out').onchange = async () => {
   store('gl_out', $('#out').value);
   try { await $('#player').setSinkId($('#out').value); } catch(e) {}
+  try { if (actx && actx.setSinkId) await actx.setSinkId($('#out').value); } catch(e) {}
+  note('output changed to "' + ($('#out').selectedOptions[0]?.text || 'default') + '"');
 };
+$('#mic').addEventListener('change', () => note('microphone choice: "' + ($('#mic').selectedOptions[0]?.text || 'default') + '" (used on next join)'));
 
 // ---- call
 function munge(sdp){
@@ -91,29 +117,37 @@ async function join(){
       channelCount: {ideal: 1}, sampleRate: {ideal: 48000}
     }});
   } catch (e) {
+    note('microphone failed: ' + (e.name || '') + ' ' + (e.message || ''));
     $('#join').disabled = false;
     $('#callstate').textContent = 'Microphone not available: ' + (e.message || e.name) + '. Check your browser\'s permission and try again.';
     return;
   }
   listDevices().catch(()=>{});
+  { const t = stream.getAudioTracks()[0], st = t.getSettings ? t.getSettings() : {};
+    note('join: mic "' + (t.label || '?') + '" ' + (st.sampleRate || '?') + ' Hz, ' + (st.channelCount || '?') + ' ch, echo cancellation ' + (st.echoCancellation ? 'ON' : 'off') +
+         ', noise suppression ' + (st.noiseSuppression ? 'ON' : 'off') + ', auto gain ' + (st.autoGainControl ? 'ON' : 'off')); }
   actx = actx || new AudioContext();
   if (actx.state === 'suspended') await actx.resume();
+  if ($('#out').value && actx.setSinkId) actx.setSinkId($('#out').value).catch(()=>{});
   micAn = actx.createAnalyser(); micAn.fftSize = 1024;
-  actx.createMediaStreamSource(stream).connect(micAn);
+  micSrc = actx.createMediaStreamSource(stream); micSrc.connect(micAn);
 
   pc = new RTCPeerConnection({iceServers: [{urls: 'stun:stun.l.google.com:19302'}]});
   const tr = pc.addTransceiver(stream.getAudioTracks()[0], {direction: 'sendrecv', streams: [stream]});
   pc.onicecandidate = e => { if (e.candidate) send({t:'candidate', candidate: e.candidate.toJSON()}); };
   pc.ontrack = e => {
     const s = e.streams[0] || new MediaStream([e.track]);
+    note('receiving the show audio');
     const p = $('#player'); p.srcObject = s;
     if ($('#out').value && p.setSinkId) p.setSinkId($('#out').value).catch(()=>{});
     p.play().catch(()=>{});
     showAn = actx.createAnalyser(); showAn.fftSize = 1024;
     actx.createMediaStreamSource(s).connect(showAn);
   };
+  pc.oniceconnectionstatechange = () => { if (pc) note('network (ice): ' + pc.iceConnectionState); };
   pc.onconnectionstatechange = () => {
     const s = pc ? pc.connectionState : 'closed';
+    note('audio connection: ' + s);
     const label = {connecting:'Connecting audio…', connected:'You are live with the host. 🎙', disconnected:'Audio interrupted - trying to recover…', failed:'Audio connection failed.'}[s];
     if (label) $('#callstate').textContent = label;
     if (s === 'connected') {
@@ -128,18 +162,20 @@ async function join(){
   send({t:'offer', sdp: pc.localDescription.sdp});
   $('#callstate').textContent = 'Connecting audio…';
   $('#join').classList.add('hidden'); $('#join').disabled = false;
-  $('#mute').classList.remove('hidden'); $('#leave').classList.remove('hidden');
+  $('#mute').classList.remove('hidden'); $('#leave').classList.remove('hidden'); $('#hearself').classList.remove('hidden');
   for (const s of ['#mic', '#headphones']) $(s).disabled = true;
 }
 
 function hangup(tell){
+  if (pc || stream) note(tell ? 'you left the audio' : 'audio stopped');
   if (tell) send({t:'hangup'});
+  hearSelf(false); statsPrev = null;
   if (pc) { pc.close(); pc = null; }
   if (stream) { stream.getTracks().forEach(t => t.stop()); stream = null; }
-  micAn = showAn = null; muted = false;
+  micAn = showAn = micSrc = null; muted = false;
   $('#player').srcObject = null;
-  $('#mute').textContent = 'Mute mic';
-  $('#join').classList.remove('hidden'); $('#mute').classList.add('hidden'); $('#leave').classList.add('hidden');
+  $('#mute').textContent = 'Mute my mic'; $('#mute').classList.remove('danger');
+  $('#join').classList.remove('hidden'); for (const b of ['#mute', '#leave', '#hearself']) $(b).classList.add('hidden');
   for (const s of ['#mic', '#headphones']) $(s).disabled = false;
   $('#callstate').textContent = 'Not connected to audio.';
 }
@@ -149,8 +185,81 @@ $('#leave').onclick = () => hangup(true);
 $('#mute').onclick = () => {
   if (!stream) return; muted = !muted;
   stream.getAudioTracks().forEach(t => t.enabled = !muted);
-  $('#mute').textContent = muted ? 'Unmute mic' : 'Mute mic';
+  $('#mute').textContent = muted ? 'Unmute my mic' : 'Mute my mic';
   $('#mute').classList.toggle('danger', muted);
+  $('#callstate').textContent = muted ? 'Your mic is MUTED - the show cannot hear you.' : 'You are live with the host. 🎙';
+  note(muted ? 'you muted your mic' : 'you unmuted your mic');
+};
+
+// ---- hear yourself: your own mic in your headphones (headphones only - speakers would feed back)
+function hearSelf(on){
+  if (selfGain) { selfGain.disconnect(); selfGain = null; }
+  if (on && micSrc && actx) {
+    selfGain = actx.createGain(); selfGain.gain.value = 1;
+    micSrc.connect(selfGain); selfGain.connect(actx.destination);
+  }
+  $('#hearself').textContent = selfGain ? 'Hear yourself: ON' : 'Hear yourself';
+  $('#hearself').classList.toggle('on', !!selfGain);
+}
+$('#hearself').onclick = () => {
+  if (!selfGain && !$('#headphones').checked) {
+    $('#callstate').textContent = 'Hear yourself only works with headphones - through speakers it would howl.';
+    return;
+  }
+  hearSelf(!selfGain);
+  note(selfGain ? 'hear yourself: on' : 'hear yourself: off');
+};
+
+// ---- connection stats into the log every 15 s (both directions, no IP addresses)
+let statsPrev = null;
+async function statsTick(){
+  if (!pc || pc.connectionState !== 'connected') return;
+  let r; try { r = await pc.getStats(); } catch(e) { return; }
+  let inb, out, rin, pair;
+  r.forEach(s => {
+    if (s.kind === 'audio' && s.type === 'inbound-rtp') inb = s;
+    if (s.kind === 'audio' && s.type === 'outbound-rtp') out = s;
+    if (s.kind === 'audio' && s.type === 'remote-inbound-rtp') rin = s;
+    if (s.type === 'transport' && s.selectedCandidatePairId) pair = r.get(s.selectedCandidatePairId);
+  });
+  if (!pair) r.forEach(s => { if (s.type === 'candidate-pair' && s.nominated && s.state === 'succeeded') pair = s; });
+  const now = {t: performance.now(), inb, out};
+  const p = statsPrev; statsPrev = now;
+  if (!p) return;
+  const secs = (now.t - p.t) / 1000, d = (a, b, k) => (a && b && a[k] != null && b[k] != null) ? a[k] - b[k] : 0;
+  const parts = [];
+  if (out) {
+    const kbps = d(out, p.out, 'bytesSent') * 8 / 1000 / secs;
+    let s = 'you->show ' + kbps.toFixed(0) + ' kb/s';
+    if (rin) s += ', host reports loss ' + ((rin.fractionLost || 0) * 100).toFixed(1) + '%' + (rin.jitter != null ? ', jitter ' + (rin.jitter * 1000).toFixed(0) + ' ms' : '');
+    parts.push(s);
+  }
+  if (inb) {
+    const got = d(inb, p.inb, 'packetsReceived'), lost = d(inb, p.inb, 'packetsLost');
+    const conc = d(inb, p.inb, 'concealedSamples'), tot = d(inb, p.inb, 'totalSamplesReceived');
+    const jbd = d(inb, p.inb, 'jitterBufferDelay'), jbn = d(inb, p.inb, 'jitterBufferEmittedCount');
+    parts.push('show->you lost ' + lost + '/' + (got + lost) + ' pkts, jitter ' + ((inb.jitter || 0) * 1000).toFixed(0) + ' ms' +
+      (jbn ? ', buffer ' + (jbd / jbn * 1000).toFixed(0) + ' ms' : '') + (tot ? ', concealed ' + (conc / tot * 100).toFixed(1) + '%' : ''));
+  }
+  if (pair) {
+    const lc = r.get(pair.localCandidateId), rc = r.get(pair.remoteCandidateId);
+    parts.push('round trip ' + (pair.currentRoundTripTime != null ? (pair.currentRoundTripTime * 1000).toFixed(0) + ' ms' : '?') +
+      ' (' + (lc ? lc.candidateType + '/' + (lc.protocol || '') : '?') + ' -> ' + (rc ? rc.candidateType : '?') + ')');
+  }
+  if (parts.length) note('stats: ' + parts.join(' | '));
+}
+setInterval(statsTick, 15000);
+
+$('#copylog').onclick = async () => {
+  const text = diagReport();
+  let ok = false;
+  try { await navigator.clipboard.writeText(text); ok = true; } catch(e) {}
+  if (!ok) { // fallback: select the text so the guest can copy it by hand
+    const r = document.createRange(); r.selectNodeContents($('#diaglog'));
+    const sel = getSelection(); sel.removeAllRanges(); sel.addRange(r);
+  }
+  $('#copied').textContent = ok ? 'Copied - paste it into the chat or an email.' : 'Selected - press Ctrl+C (Cmd+C on a Mac) to copy.';
+  setTimeout(() => { $('#copied').textContent = ''; }, 6000);
 };
 
 // ---- meters
@@ -164,5 +273,6 @@ $('#name').addEventListener('change', () => { const n = $('#name').value.trim();
 chatForm($('#chatform'), $('#msg'), t => send({t:'chat', text:t}));
 window.addEventListener('beforeunload', () => { if (pc) send({t:'hangup'}); });
 
+note('page opened');
 if (!token) fatal('This link is incomplete. Ask the host for your invite link.');
 else { connect(); if (navigator.mediaDevices) listDevices().catch(()=>{}); }