zebra-report: zebra-spaces mobile + host-rejoin fixes

This commit is contained in:
russell@unturf.com 2026-05-31 14:19:44 -04:00
parent a8b184b853
commit 910d961dac
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@ -16,26 +16,38 @@
font-family: monospace; background: #fff; color: #000;
padding: 2rem; max-width: 1440px; margin: 0 auto;
}
/* two-column page: left = timeline (blank for now, ~50%), right = controls.
* stacks below 800px so the controls stay usable on a phone. */
/* two-column page on desktop: left = timeline (1fr, takes remaining
* space — will host the running event feed once v0.3 lands), right =
* controls (capped at 520px so they never get awkwardly wide on a
* full-screen monitor). Both columns get min-width:0 so they shrink
* without forcing a horizontal scrollbar. */
.page {
display: grid;
grid-template-columns: 1fr 1fr;
grid-template-columns: minmax(0, 1fr) minmax(0, 520px);
gap: 2rem;
align-items: start;
}
.timeline {
border-right: 1px solid #ddd; padding-right: 2rem; min-height: 60vh;
min-width: 0;
}
.controls { min-width: 0; }
.timeline-placeholder {
font-size: 0.8rem; color: #999; padding: 1rem 0; line-height: 1.6;
}
@media (max-width: 800px) {
body { padding: 1.25rem; }
.page { grid-template-columns: 1fr; gap: 1rem; }
.timeline { border-right: none; border-bottom: 1px solid #ddd;
padding-right: 0; padding-bottom: 1rem; min-height: 0; }
/* stack on mobile, controls first, timeline below */
.page { grid-template-columns: minmax(0, 1fr); gap: 1rem; }
.controls { order: 1; }
.timeline { order: 2;
border-right: none; border-top: 1px solid #ddd;
padding-right: 0; padding-top: 1rem; min-height: 0; }
}
/* never let dynamically-appended <audio> sinks (one per remote
* speaker) render their default ~300px control strip — they're just
* sinks for the WebRTC track, no UI required */
audio { display: none; }
h1 {
font-family: 'chunkfiveregular', serif;
font-size: 3rem; font-weight: normal; letter-spacing: 0.02em;
@ -447,26 +459,43 @@ const SFU_BASE = (new URLSearchParams(location.search).get('sfu')
let sfuPubPC = null, sfuPubPeerID = null;
let sfuSubPC = null, sfuSubPeerID = null, sfuSubEvents = null;
/* SFU forwarded tracks whose publisher pubkey we couldn't match to a room
* member yet — ontrack fires from RTP; the signal's peer-joined may arrive
* a beat later. Without queueing, the host's rejoined audio would be lost. */
const sfuPendingTracks = new Map(); // pubHex -> MediaStream
/* SFU MediaStream cache keyed by PUBLISHER pubkey hex (= streamID set by the
* SFU's TrackLocal). Survives across host leave/rejoin: when a speaker drops
* we tear their audio element, but Pion often REUSES the transceiver on
* their rejoin so ontrack doesn't fire a second time — the same MediaStream
* object keeps receiving new RTP under the hood. By caching by pubkey we
* can re-attach that same stream to a fresh audio element on peer-joined
* even when no fresh ontrack event arrives. */
const sfuStreamsByPubHex = new Map(); // pubHex -> MediaStream
function attachSfuTrack(uuid, stream){
let a = remoteAudio.get(uuid);
if (!a){ a = document.createElement('audio'); a.autoplay = true; document.body.appendChild(a); remoteAudio.set(uuid, a); }
a.srcObject = stream;
/* programmatic play in case autoplay policy needs the nudge after a track
* swap — caller already had a user gesture (entered the space) */
try { const p = a.play(); if (p && p.catch) p.catch(()=>{}); } catch(_){}
stopMeter(uuid); startMeter(uuid, stream);
logLine('', 'sfu: receiving '+((members.get(uuid)||{}).handle || shortHex(uuid)));
}
function flushSfuPendingTracks(){
if (!sfuPendingTracks.size) return;
for (const [pubHex, stream] of [...sfuPendingTracks]){
/* If we already have a cached SFU stream for this member's pubkey (from a
* prior subscribe-side ontrack), attach it. Used on peer-joined / host
* promotions / room state updates so a rejoined speaker's audio reattaches
* without needing the SFU to emit a fresh ontrack. */
function attachCachedSfuStreamFor(uuid){
const mm = members.get(uuid);
if (!mm || !mm.pubkey) return;
let pubHex;
try { pubHex = hex(unb64(mm.pubkey)); } catch(_){ return; }
const stream = sfuStreamsByPubHex.get(pubHex);
if (stream) attachSfuTrack(uuid, stream);
}
function flushSfuStreams(){
for (const [pubHex, stream] of sfuStreamsByPubHex){
for (const [uuid, mm] of members){
try {
if (mm.pubkey && hex(unb64(mm.pubkey)) === pubHex){
attachSfuTrack(uuid, stream);
sfuPendingTracks.delete(pubHex);
if (!remoteAudio.has(uuid)) attachSfuTrack(uuid, stream);
break;
}
} catch(_){}
@ -513,15 +542,18 @@ async function sfuSubscribe(){
pc.ontrack = (ev) => {
const pubHex = ev.streams[0] ? ev.streams[0].id : '';
if (!pubHex) return;
/* try to match streamID (= publisher's pubkey hex) -> room uuid; if the
* member's not in our roster yet, queue the stream — flushSfuPendingTracks
* will pick it up on the next peer-joined / host-promoted / state event */
let matchUuid = null;
/* cache stream by publisher pubkey so it survives the member's session
* uuid changing across leave/rejoin — see flushSfuStreams */
sfuStreamsByPubHex.set(pubHex, ev.streams[0]);
for (const [uuid, mm] of members){
try { if (mm.pubkey && hex(unb64(mm.pubkey)) === pubHex){ matchUuid = uuid; break; } } catch(_){}
try {
if (mm.pubkey && hex(unb64(mm.pubkey)) === pubHex){
attachSfuTrack(uuid, ev.streams[0]);
return;
}
} catch(_){}
}
if (matchUuid){ attachSfuTrack(matchUuid, ev.streams[0]); }
else { sfuPendingTracks.set(pubHex, ev.streams[0]); }
/* no matching member yet — flushSfuStreams will attach on peer-joined */
};
/* server-initiated offer: POST /subscribe (empty body) — SFU answers with
* an SDP offer containing one m-line per current publisher. We answer it
@ -565,7 +597,7 @@ async function sfuSubscribe(){
async function sfuUnsubscribe(){
if (sfuSubEvents){ try { sfuSubEvents.close(); } catch(_){} sfuSubEvents = null; }
if (sfuSubPC){ try { sfuSubPC.close(); } catch(_){} sfuSubPC = null; sfuSubPeerID = null; }
sfuPendingTracks.clear();
sfuStreamsByPubHex.clear();
}
/* ==================================================================
@ -773,7 +805,7 @@ async function handleSignal(raw){
renderRoom();
break;
case 'state':
roomEpoch = m.epoch; applyState(m.state); flushSfuPendingTracks(); renderRoom(); break;
roomEpoch = m.epoch; applyState(m.state); flushSfuStreams(); renderRoom(); break;
case 'peer-joined':
members.set(m.uuid, { uuid:m.uuid, pubkey:m.pubkey, handle:m.handle, role:m.role, joined_at: Date.now()/1000 });
logLine('', m.handle+' joined as '+m.role);
@ -785,7 +817,7 @@ async function handleSignal(raw){
}
/* a new member may resolve a queued SFU track (e.g. host's rejoin
* race where ontrack fired before peer-joined) */
flushSfuPendingTracks();
flushSfuStreams();
/* establish mesh PC if both us and them are speakers (or mods).
* present-member-offers: existing speaker offers when a new speaker
* arrives. deterministic by uuid string compare. */
@ -898,7 +930,7 @@ async function handleSignal(raw){
if (m.new_host_uuid === myUUID){ myRole = 'host'; setStatus('connected as host','ok'); onRoleChanged('cohost','host'); }
else { setStatus('connected as '+myRole, 'ok'); } /* clears the space-closing warning */
logLine('', (mm.handle||shortHex(m.new_host_uuid))+' is now host'); }
flushSfuPendingTracks();
flushSfuStreams();
renderRoom();
}
break;
@ -1251,8 +1283,8 @@ logLine('', 'ready — pick a handle, type a rendezvous code, enter the space');
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</footer>