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fix(sync): close canonical recovery merge blockers

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This commit is contained in:
Timo
2026-08-25 22:24:37 +02:00
parent 213a639314
commit 0d23859a9f
14 changed files with 484 additions and 87 deletions
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scripts/test-server-ws.mjs
+73 -17
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@@ -10,7 +10,7 @@ import {
materializeMediaIntent,
reserveLatestMediaIntentSequence
} from '../extension/offline-media-intent.js';
import { FORCE_SYNC_TARGET_TTL, FORCE_SYNC_TIMEOUT } from '../shared/constants.js';
import { FORCE_SYNC_TARGET_DELAY_WARNING, FORCE_SYNC_TIMEOUT } from '../shared/constants.js';
const __dirname = path.dirname(fileURLToPath(import.meta.url));
const require = createRequire(path.join(__dirname, '..', 'server', 'package.json'));
@@ -83,7 +83,7 @@ try {
const coalescedRid = 'coalesced-media-'+Date.now();
const legacyReceiver = await c(), coalescingSender = await c();
await j(legacyReceiver, coalescedRid, 'legacy-receiver');
await j(coalescingSender, coalescedRid, 'coalesce-sender', null, ['chat-v1']);
await j(coalescingSender, coalescedRid, 'coalesce-sender', null, ['chat-v1', 'media-state-v1']);
legacyReceiver._m.length = coalescingSender._m.length = 0;
s(legacyReceiver, 'play', { currentTime: 100, seq: 1, actionTimestamp: 1 });
@@ -175,12 +175,13 @@ try {
// --- Mixed-version rollout: pre-media-state extension + current extension ---
// Legacy intentionally omits clientCapabilities entirely and uses only the
// pre-feature JOIN/PLAY/PAUSE/SEEK/Force Sync wire contract. The current
// client advertises only its existing chat capability; media-state support
// is a relay capability and is never required for server acquisition.
// Current clients additionally advertise that they maintain canonical state
// while solo. Recovery itself remains relay-gated and legacy clients still
// omit clientCapabilities entirely.
const mixedMediaRid = 'mixed-media-'+Date.now();
const legacyMedia = await c(), currentMedia = await c();
const legacyRoomData = await j(legacyMedia, mixedMediaRid, 'legacy-media');
const currentRoomData = await j(currentMedia, mixedMediaRid, 'current-media', null, ['chat-v1']);
const currentRoomData = await j(currentMedia, mixedMediaRid, 'current-media', null, ['chat-v1', 'media-state-v1']);
assert.equal(legacyRoomData.roomId, mixedMediaRid, 'legacy ROOM_DATA keeps roomId type/meaning');
assert.ok(Array.isArray(legacyRoomData.peers), 'legacy ROOM_DATA keeps peers array');
assert.equal(typeof legacyRoomData.controlMode, 'string', 'legacy ROOM_DATA keeps controlMode type');
@@ -294,7 +295,7 @@ try {
await w(currentMedia, 'pause');
const legacyFinalRevision = mod.rooms.get(mixedMediaRid).mediaState.revision;
const currentMediaRejoin = await c();
const mixedRejoinData = await j(currentMediaRejoin, mixedMediaRid, 'current-media', null, ['chat-v1']);
const mixedRejoinData = await j(currentMediaRejoin, mixedMediaRid, 'current-media', null, ['chat-v1', 'media-state-v1']);
assert.equal(mixedRejoinData.mediaState.revision, legacyFinalRevision);
assert.equal(mixedRejoinData.mediaState.playbackState, 'paused');
assert.equal(mixedRejoinData.mediaState.currentTime, 1700);
@@ -302,6 +303,27 @@ try {
'current reconnect snapshot reflects the legacy client latest accepted intent');
assert.equal(legacyMedia._m.some(raw => raw.includes('media_state')), false,
'legacy client receives no new canonical event or ACK requirement');
currentMediaRejoin.close();
await delay(100);
assert.equal(mod.rooms.get(mixedMediaRid).mediaState, null,
'canonical state is cleared when only a legacy solo-suppressing client remains');
close();
resetConnectionRate();
// The inverse must remain true: a capable solo client keeps publishing
// PLAY/PAUSE/SEEK, so removing a legacy peer must not discard valid state.
const capableSoloRid = 'capable-solo-'+Date.now();
const capableSolo = await c(), transientLegacy = await c();
await j(capableSolo, capableSoloRid, 'capable-solo', null, ['chat-v1', 'media-state-v1']);
await j(transientLegacy, capableSoloRid, 'transient-legacy');
capableSolo._m.length = transientLegacy._m.length = 0;
s(capableSolo, 'play', { currentTime: 42, mediaTitle: 'Series S03E04' });
await w(transientLegacy, 'play');
const capableSoloState = { ...mod.rooms.get(capableSoloRid).mediaState };
transientLegacy.close();
await delay(100);
assert.deepEqual(mod.rooms.get(capableSoloRid).mediaState, capableSoloState,
'canonical state remains valid when the sole remaining client advertises media-state-v1');
close();
resetConnectionRate();
@@ -311,12 +333,18 @@ try {
const initialMediaRoom = await j(msa, msrid, 'msa');
assert.equal(initialMediaRoom.mediaState, null, 'media state is initially null');
s(msa, 'play', { currentTime: 100, revision: 999, updatedBy: 'spoofed' });
s(msa, 'play', {
currentTime: 100,
mediaTitle: 'Series S01E02',
revision: 999,
updatedBy: 'spoofed'
});
await delay(120);
const msb = await c();
const playingJoin = await j(msb, msrid, 'msb');
assert.equal(playingJoin.mediaState.revision, 1, 'first accepted PLAY creates revision 1');
assert.equal(playingJoin.mediaState.playbackState, 'playing');
assert.equal(playingJoin.mediaState.mediaTitle, 'Series S01E02');
assert.ok(playingJoin.mediaState.currentTime >= 100.08 && playingJoin.mediaState.currentTime < 101,
`playing late join receives projected position (${playingJoin.mediaState.currentTime})`);
assert.equal(playingJoin.mediaState.updatedBy, 'msa', 'updatedBy is server-tracked identity');
@@ -404,8 +432,8 @@ try {
'authorized EXECUTE commits the latest target visible to legacy peers');
assert.equal(competingForceState.updatedBy, 'msa');
// The initiator's normal ACK timeout must still fit inside relay target
// retention. This is the exact fallback boundary used by background.js.
// The initiator's normal ACK timeout stays below the relay's delayed-target
// warning boundary and commits normally.
s(msa, 'force_sync_prepare', { targetTime: 925 });
await w(msb, 'force_sync_prepare');
mod.rooms.get(msrid).forceSyncTarget.preparedAt = Date.now() - FORCE_SYNC_TIMEOUT;
@@ -414,18 +442,39 @@ try {
assert.equal(mod.rooms.get(msrid).mediaState.currentTime, 925,
'relay grace accepts EXECUTE at the client ACK-timeout boundary');
// Even beyond the warning boundary, a target that no newer room action
// superseded remains the only safe way to release already-paused peers.
s(msa, 'force_sync_prepare', { targetTime: 950 });
await w(msb, 'force_sync_prepare');
const beforeExpiredExecute = { ...mod.rooms.get(msrid).mediaState };
mod.rooms.get(msrid).forceSyncTarget.preparedAt = Date.now() - FORCE_SYNC_TARGET_TTL - 1;
mod.rooms.get(msrid).forceSyncTarget.preparedAt = Date.now() - FORCE_SYNC_TARGET_DELAY_WARNING - 1;
msa._m.length = msb._m.length = 0;
s(msa, 'force_sync_execute', {});
let expiredExecuteDropped = false;
try { await w(msb, 'force_sync_execute', 500); } catch { expiredExecuteDropped = true; }
assert.ok(expiredExecuteDropped, 'an expired Force Sync target rejects delayed EXECUTE');
assert.deepEqual(mod.rooms.get(msrid).mediaState, beforeExpiredExecute);
await w(msb, 'force_sync_execute');
assert.equal(mod.rooms.get(msrid).mediaState.revision, beforeExpiredExecute.revision + 1);
assert.equal(mod.rooms.get(msrid).mediaState.currentTime, 950,
'a delayed EXECUTE still releases peers and commits its unsuperseded prepared target');
assert.equal(mod.rooms.get(msrid).forceSyncTarget, null);
// A relay restart cannot recover transient PREPARE state. Preserve the old
// wire liveness fallback without inventing a canonical target.
const beforeUntrackedExecute = { ...mod.rooms.get(msrid).mediaState };
msa._m.length = msb._m.length = 0;
s(msa, 'force_sync_execute', {});
await w(msb, 'force_sync_execute');
assert.deepEqual(mod.rooms.get(msrid).mediaState, beforeUntrackedExecute,
'an untracked compatibility EXECUTE relays without canonical mutation');
s(msa, 'force_sync_prepare', { targetTime: 975 });
await w(msb, 'force_sync_prepare');
s(msb, 'seek', { targetTime: 'invalid' });
await w(msa, 'seek');
assert.equal(mod.rooms.get(msrid).forceSyncTarget.targetTime, 975,
'a sanitized no-op SEEK does not supersede an in-flight prepared target');
s(msa, 'force_sync_execute', {});
await w(msb, 'force_sync_execute');
assert.equal(mod.rooms.get(msrid).mediaState.currentTime, 975);
msa._m.length = msb._m.length = 0;
s(msa, 'force_sync_prepare', { targetTime: 1_000 });
await w(msb, 'force_sync_prepare');
@@ -830,14 +879,21 @@ try {
close();
resetConnectionRate();
// A transient disconnect clears the Host Control exemption but not the
// validated room target. If the peer rejoins with current authority, its
// recovered EXECUTE must keep live playback and canonical state aligned.
// A transient disconnect removes the co-host role but not the validated
// room target. The same PREPARE initiator may still finish that already
// visible transaction after reconnecting as a host-only guest.
const forceReconnectRid = 'force-reconnect-'+Date.now();
const forceReconnectHost = await c(), forceReconnectPeer = await c();
await j(forceReconnectHost, forceReconnectRid, 'force-host');
await j(forceReconnectPeer, forceReconnectRid, 'force-peer');
forceReconnectHost._m.length = forceReconnectPeer._m.length = 0;
s(forceReconnectHost, 'set_control_mode', { controlMode: 'host-only' });
await w(forceReconnectHost, 'control_mode');
await w(forceReconnectPeer, 'control_mode');
forceReconnectHost._m.length = forceReconnectPeer._m.length = 0;
s(forceReconnectHost, 'set_peer_role', { peerId: 'force-peer', controller: true });
await w(forceReconnectPeer, 'control_mode');
forceReconnectHost._m.length = forceReconnectPeer._m.length = 0;
s(forceReconnectPeer, 'force_sync_prepare', { targetTime: 444 });
await w(forceReconnectHost, 'force_sync_prepare');
forceReconnectPeer.close();