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SmartCubeCommand,
SmartCubeEvent,
SmartCubeTransportConnection,
SmartCubeVendorCommand,
} from '../../bindings/smartCubeTransport.js';
import * as ReplayCursor from '@wstein/regrip-core/domain/ReplayCursor';
import type { regripToken as RegripToken } from '@wstein/regrip-core/domain/CubeNotation';
import { resolveSessionFeatures, type SessionFeatures } from '@wstein/regrip-core/session/features';
import { bundledProfiles } from '@wstein/regrip-core/session/profile/bundled';
import { resolveProfile } from '@wstein/regrip-core/session/profile/resolveProfile';
import {
createSmartCubeSession,
type CustomTriggerEvent,
type MoveGapEvent,
type SessionGyroEvent,
type ShakeTriggerEvent,
type SmartCubeSession,
type SmartCubeSessionDiagnostic,
type SmartCubeSessionEvent,
type SmartCubeSessionState,
type VirtualRegripEvent,
} from '../smartCubeSession.js';
import {
createJsonlReplay,
createJsonlMockConnection,
isSmartCubeEvent,
type JsonlMockIdentity,
type JsonlReplay,
} from './jsonlMock.js';
/** Choose raw transport replay or recorded session-output replay. */
export type ReplayFeed = 'connection' | 'session';
/** Browser-local storage used only by the dev replay harness. */
export const REPLAY_STORAGE_KEY = 'regrip.replay.jsonl';
export type ReplayItem = {
timestamp: number;
event?: SmartCubeEvent | SmartCubeSessionEvent;
status?: SmartCubeSessionState['status'];
};
type ReplayItemPayload = Omit<ReplayItem, 'timestamp'>;
type BuiltReplayItem = { payload: ReplayItemPayload; sourceTimestamp?: number };
type ReplayItemBuilder = (
data: Record<string, unknown>,
fallbackTimestamp: number,
) => BuiltReplayItem | undefined;
type ReplayListener = () => void;
type RawGyroEvent = Extract<SmartCubeEvent, { type: 'GYRO' }>;
type Quaternion = RawGyroEvent['quaternion'];
type Vector3 = NonNullable<RawGyroEvent['velocity']>;
type ReplayOutputSession = SmartCubeSession & {
/** Replay-only injection seam; never exposed from a production session. */
emit(event: SmartCubeSessionEvent): void;
setReplayStatus(status: SmartCubeSessionState['status']): void;
};
const regripTokens = new Set<RegripToken>(['x', "x'", 'x2', 'y', "y'", 'y2', 'z', "z'", 'z2']);
const synchronousGyroScheduler = {
schedule(flush: () => void): void {
flush();
},
cancel(): void {},
};
function createFanout<T>() {
const listeners = new Set<(value: T) => void>();
return {
emit(value: T): void {
listeners.forEach((listener) => listener(value));
},
subscribe(listener: (value: T) => void): () => void {
listeners.add(listener);
return () => listeners.delete(listener);
},
};
}
function isRawSessionEvent(
value: unknown,
): value is Exclude<SmartCubeSessionEvent, { type: 'GYRO' }> {
return isSmartCubeEvent(value) && value.type !== 'GYRO';
}
function isSmartCubeSessionEvent(
value: SmartCubeEvent | SmartCubeSessionEvent,
): value is SmartCubeSessionEvent {
return (
value.type !== 'GYRO' ||
('relative' in value &&
'driftCorrected' in value &&
'stabilized' in value &&
'velocityMagnitude' in value &&
'dtSeconds' in value)
);
}
function number(value: unknown): number | undefined {
return typeof value === 'number' && Number.isFinite(value) ? value : undefined;
}
function quaternion(value: unknown): Quaternion | undefined {
if (!value || typeof value !== 'object') return undefined;
const candidate = value as Record<string, unknown>;
Iif (
typeof candidate.x !== 'number' ||
typeof candidate.y !== 'number' ||
typeof candidate.z !== 'number' ||
typeof candidate.w !== 'number'
) {
return undefined;
}
return { x: candidate.x, y: candidate.y, z: candidate.z, w: candidate.w };
}
function vector3(value: unknown): Vector3 | undefined {
Eif (!value || typeof value !== 'object') return undefined;
const candidate = value as Record<string, unknown>;
const x = number(candidate.x);
const y = number(candidate.y);
const z = number(candidate.z);
return x === undefined || y === undefined || z === undefined ? undefined : { x, y, z };
}
function record(value: unknown): Record<string, unknown> | undefined {
return value !== null && typeof value === 'object' && !Array.isArray(value)
? (value as Record<string, unknown>)
: undefined;
}
function capturedFeatures(entries: JsonlReplay['entries']): SessionFeatures | undefined {
const session = record(entries[0]?.data.session);
const profileValue = record(session?.profileValue);
const features = record(profileValue?.features);
const stabilizer = record(features?.stabilizer);
const hysteresis = record(stabilizer?.hysteresis);
const drift = record(stabilizer?.drift);
const regrip = record(features?.regrip);
const customTrigger = record(features?.customTrigger);
const triggers = customTrigger?.triggers;
if (
typeof stabilizer?.enabled !== 'boolean' ||
number(stabilizer.radiusDeg) === undefined ||
number(stabilizer.snapDeg) === undefined ||
number(stabilizer.velocityMax) === undefined ||
typeof hysteresis?.enabled !== 'boolean' ||
number(hysteresis.marginDeg) === undefined ||
typeof drift?.enabled !== 'boolean' ||
number(drift.degPerSec) === undefined ||
typeof regrip?.enabled !== 'boolean' ||
(regrip.detector !== undefined &&
regrip.detector !== 'threshold' &&
regrip.detector !== 'absolute') ||
(regrip.thresholdDeg !== undefined && number(regrip.thresholdDeg) === undefined) ||
typeof customTrigger?.enabled !== 'boolean' ||
!Array.isArray(triggers)
) {
return undefined;
}
const parsedTriggers = triggers.flatMap((value) => {
const trigger = record(value);
if (trigger?.kind === 'moveBack' && number(trigger.windowMs) !== undefined) {
return [{ kind: 'moveBack' as const, windowMs: trigger.windowMs as number }];
}
Iif (trigger?.kind !== 'shake') return [];
const optionalNumbers = [
'minStepAngleDeg',
'minSteps',
'minReversals',
'maxSampleGapMs',
'burstWindowMs',
'faceGuardMs',
'cooldownMs',
] as const;
Iif (
optionalNumbers.some(
(key) => trigger[key] !== undefined && number(trigger[key]) === undefined,
)
) {
return [];
}
return [
Object.fromEntries([
['kind', 'shake'],
...optionalNumbers.flatMap((key) =>
trigger[key] === undefined ? [] : ([[key, trigger[key]]] as const),
),
] as const) as SessionFeatures['customTrigger']['triggers'][number],
];
});
Iif (parsedTriggers.length !== triggers.length) return undefined;
return {
stabilizer: {
enabled: stabilizer.enabled,
radiusDeg: stabilizer.radiusDeg as number,
snapDeg: stabilizer.snapDeg as number,
velocityMax: stabilizer.velocityMax as number,
hysteresis: { enabled: hysteresis.enabled, marginDeg: hysteresis.marginDeg as number },
drift: { enabled: drift.enabled, degPerSec: drift.degPerSec as number },
},
// Detector-specific fields from older captures are intentionally ignored.
regrip: { enabled: regrip.enabled },
customTrigger: { enabled: customTrigger.enabled, triggers: parsedTriggers },
};
}
/**
* Older app exports only persisted derived gyro samples. They still contain
* the raw quaternion needed to reconstruct the connection/session pipeline.
*/
function gyroFromStabilizer(
data: Record<string, unknown>,
fallbackTimestamp: number,
): RawGyroEvent | undefined {
const quaternionValue = quaternion(data.quaternion);
Iif (!quaternionValue) return undefined;
const validVelocity = vector3(data.velocity);
return {
type: 'GYRO',
timestamp: number(data.timestamp) ?? fallbackTimestamp,
quaternion: quaternionValue,
...(validVelocity ? { velocity: validVelocity } : {}),
};
}
function sessionGyroFromRecord(
data: Record<string, unknown>,
fallbackTimestamp: number,
): SessionGyroEvent | undefined {
const timestamp = number(data.timestamp) ?? fallbackTimestamp;
const quaternionValue = quaternion(data.quaternion);
const relative = quaternion(data.relative);
const recordedDriftCorrected = quaternion(data.driftCorrected);
const stabilized = quaternion(data.stabilized);
const velocityMagnitude = number(data.velocityMagnitude);
const dtSeconds = number(data.dtSeconds);
if (
!quaternionValue ||
!relative ||
!stabilized ||
velocityMagnitude === undefined ||
dtSeconds === undefined
) {
return undefined;
}
const velocity = vector3(data.velocity);
return {
type: 'GYRO',
timestamp,
quaternion: quaternionValue,
...(velocity ? { velocity } : {}),
relative,
driftCorrected: recordedDriftCorrected ?? relative,
stabilized,
velocityMagnitude,
dtSeconds,
};
}
function regripFromRecord(
data: Record<string, unknown>,
fallbackTimestamp: number,
): VirtualRegripEvent | undefined {
const timestamp = number(data.timestamp) ?? fallbackTimestamp;
const notationToken = data.notationToken;
const sensorFrameToken = data.sensorFrameToken;
if (
typeof notationToken !== 'string' ||
!regripTokens.has(notationToken as RegripToken) ||
typeof sensorFrameToken !== 'string' ||
!regripTokens.has(sensorFrameToken as RegripToken)
) {
return undefined;
}
return {
type: 'REGRIP',
timestamp,
notationToken: notationToken as RegripToken,
sensorFrameToken: sensorFrameToken as RegripToken,
};
}
function customTriggerFromRecord(
data: Record<string, unknown>,
fallbackTimestamp: number,
): CustomTriggerEvent | undefined {
const timestamp = number(data.timestamp) ?? fallbackTimestamp;
return typeof data.move === 'string' && data.move.length > 0
? { type: 'CUSTOM_TRIGGER', timestamp, move: data.move }
: undefined;
}
function shakeFromRecord(
data: Record<string, unknown>,
fallbackTimestamp: number,
): ShakeTriggerEvent | undefined {
const timestamp = number(data.timestamp) ?? fallbackTimestamp;
const steps = number(data.steps);
const reversals = number(data.reversals);
const spanMs = number(data.spanMs);
return steps === undefined || reversals === undefined || spanMs === undefined
? undefined
: { type: 'SHAKE', timestamp, steps, reversals, spanMs };
}
function moveGapFromRecord(
data: Record<string, unknown>,
fallbackTimestamp: number,
): MoveGapEvent | undefined {
const timestamp = number(data.timestamp) ?? fallbackTimestamp;
const previousSerial = number(data.previousSerial);
const serial = number(data.serial);
const missing = number(data.missing);
return previousSerial === undefined ||
serial === undefined ||
missing === undefined ||
missing < 1
? undefined
: { type: 'MOVE_GAP', timestamp, previousSerial, serial, missing };
}
function statusFromRecord(
data: Record<string, unknown>,
): SmartCubeSessionState['status'] | undefined {
const status = data.status;
return status === 'disconnected' ||
status === 'connecting' ||
status === 'connected' ||
status === 'error'
? status
: undefined;
}
function connectionBuilders(hasRawGyro: boolean): Record<string, ReplayItemBuilder> {
return {
cube_event: (data) =>
isSmartCubeEvent(data)
? { payload: { event: data }, sourceTimestamp: data.timestamp }
: undefined,
gyro_stabilizer: (data, fallbackTimestamp) => {
if (hasRawGyro) return undefined;
const event = gyroFromStabilizer(data, fallbackTimestamp);
return event ? { payload: { event }, sourceTimestamp: event.timestamp } : undefined;
},
};
}
const sessionBuilders: Record<string, ReplayItemBuilder> = {
cube_event: (data) =>
isRawSessionEvent(data)
? { payload: { event: data }, sourceTimestamp: data.timestamp }
: undefined,
gyro_stabilizer: (data, fallbackTimestamp) => {
const event = sessionGyroFromRecord(data, fallbackTimestamp);
return event ? { payload: { event }, sourceTimestamp: event.timestamp } : undefined;
},
virtual_regrip: (data, fallbackTimestamp) => {
const event = regripFromRecord(data, fallbackTimestamp);
return event ? { payload: { event }, sourceTimestamp: event.timestamp } : undefined;
},
custom_trigger: (data, fallbackTimestamp) => {
const event = customTriggerFromRecord(data, fallbackTimestamp);
return event ? { payload: { event }, sourceTimestamp: event.timestamp } : undefined;
},
shake_trigger: (data, fallbackTimestamp) => {
const event = shakeFromRecord(data, fallbackTimestamp);
return event ? { payload: { event }, sourceTimestamp: event.timestamp } : undefined;
},
move_gap: (data, fallbackTimestamp) => {
const event = moveGapFromRecord(data, fallbackTimestamp);
return event ? { payload: { event }, sourceTimestamp: event.timestamp } : undefined;
},
session_status: (data) => {
const status = statusFromRecord(data);
return status ? { payload: { status } } : undefined;
},
};
function parseReplayItems(entries: JsonlReplay['entries'], feed: ReplayFeed): ReplayItem[] {
const items: ReplayItem[] = [];
let firstRecordedAt: number | undefined;
let firstTimelineTimestamp: number | undefined;
let previousTimelineTimestamp = 0;
const hasRawGyro = entries.some(
(entry) => entry.type === 'cube_event' && entry.data.type === 'GYRO',
);
const builders = feed === 'connection' ? connectionBuilders(hasRawGyro) : sessionBuilders;
const add = (
entry: (typeof entries)[number],
index: number,
value: ReplayItemPayload,
sourceTimestamp?: number,
): void => {
const recordedAt = Date.parse(entry.recordedAt);
if (firstRecordedAt === undefined && Number.isFinite(recordedAt)) firstRecordedAt = recordedAt;
if (firstTimelineTimestamp === undefined) firstTimelineTimestamp = sourceTimestamp ?? index;
const elapsed =
firstRecordedAt === undefined || !Number.isFinite(recordedAt)
? index
: recordedAt - firstRecordedAt;
const timestamp = Math.max(
previousTimelineTimestamp,
firstTimelineTimestamp + Math.max(0, elapsed),
);
previousTimelineTimestamp = timestamp;
items.push({ ...value, timestamp });
};
entries.forEach((entry, index) => {
const built = builders[entry.type]?.(entry.data, index);
if (built) add(entry, index, built.payload, built.sourceTimestamp);
});
return items;
}
function createOutputSession(
connection: SmartCubeTransportConnection,
replayFeatures?: SessionFeatures,
): ReplayOutputSession {
// A2 bypasses the production connection lifecycle, but must still present
// the same profile selected by the capture identity to the UI.
const profile = resolveProfile(
{
protocol: connection.protocol.id,
deviceName: connection.deviceName,
deviceMAC: connection.deviceMAC,
},
bundledProfiles,
);
let state: SmartCubeSessionState = {
status: 'disconnected',
connection: null,
lastEvent: null,
profile,
features: replayFeatures ?? resolveSessionFeatures(profile.value.features),
error: null,
};
const states = createFanout<SmartCubeSessionState>();
const events = createFanout<SmartCubeSessionEvent>();
const diagnostics = createFanout<SmartCubeSessionDiagnostic>();
const setState = (patch: Partial<SmartCubeSessionState>): void => {
state = { ...state, ...patch };
states.emit(state);
};
const emit = (event: SmartCubeSessionEvent): void => {
setState({ lastEvent: event });
events.emit(event);
};
const subscribeEvents: SmartCubeSession['subscribeEvents'] = (listener) => {
return events.subscribe(listener);
};
const output: ReplayOutputSession = {
getState: () => state,
subscribe(listener) {
return states.subscribe(listener);
},
subscribeEvents,
subscribeDiagnostics(listener) {
return diagnostics.subscribe(listener);
},
on(type, listener) {
return subscribeEvents((event) => {
if (event.type === type) listener(event as never);
});
},
async connect() {
setState({ status: 'connecting', error: null });
setState({ status: 'connected', connection });
},
async disconnect() {
setState({ status: 'disconnected', connection: null });
},
resetGyro() {},
configureFeatures() {},
async sendCommand(command: SmartCubeCommand) {
await connection.sendCommand(command);
},
async syncFacelets() {
throw new Error('State sync is unavailable for session-feed replay');
},
async sendVendorCommand(command: SmartCubeVendorCommand) {
Eif (!connection.sendVendorCommand)
throw new Error(`Unsupported cube command: ${command.type}`);
await connection.sendVendorCommand(command);
},
// Testing-only seam used by the replay facade; production sessions never expose it.
emit,
setReplayStatus(status: SmartCubeSessionState['status']) {
setState({ status, connection: status === 'connected' ? connection : null });
},
};
return output;
}
/**
* Deterministic JSONL transport. Connection feed exercises the full session;
* session feed pins recorded derived events for UI/adapters-only inspection.
*/
export type ReplaySessionController = ReturnType<typeof createReplaySession>;
/** Create a deterministic session facade driven by a JSONL capture. */
export function createReplaySession(contents: string, feed: ReplayFeed = 'connection') {
const replayData = createJsonlReplay(contents);
const replayFeatures = capturedFeatures(replayData.entries);
const items = parseReplayItems(replayData.entries, feed);
const timestamps = items.map((item) => item.timestamp);
let cursor = ReplayCursor.seekTo(timestamps, 0);
let mock!: ReturnType<typeof createJsonlMockConnection>;
let current!: SmartCubeSession;
let output: ReplayOutputSession | undefined;
let unsubscribeState: (() => void) | undefined;
let unsubscribeEvents: (() => void) | undefined;
let unsubscribeDiagnostics: (() => void) | undefined;
let transportGeneration = 0;
let transport = Promise.resolve();
const states = createFanout<SmartCubeSessionState>();
const events = createFanout<SmartCubeSessionEvent>();
const diagnostics = createFanout<SmartCubeSessionDiagnostic>();
const cursors = createFanout<void>();
const rebuilds = createFanout<void>();
const notifyCursor = (): void => cursors.emit();
const notifyRebuild = (): void => rebuilds.emit();
const enqueue = <T>(operation: (generation: number) => Promise<T>): Promise<T> => {
const generation = ++transportGeneration;
const task = transport.then(
() => operation(generation),
() => operation(generation),
);
transport = task.then(
() => undefined,
() => undefined,
);
return task;
};
const isCurrent = (generation: number): boolean => generation === transportGeneration;
const bind = (): void => {
unsubscribeState?.();
unsubscribeEvents?.();
unsubscribeDiagnostics?.();
unsubscribeState = current.subscribe(states.emit);
unsubscribeEvents = current.subscribeEvents(events.emit);
unsubscribeDiagnostics = current.subscribeDiagnostics(diagnostics.emit);
};
const rebuild = (notify = false): void => {
if (notify) notifyRebuild();
mock = createJsonlMockConnection(replayData);
if (feed === 'connection') {
output = undefined;
current = createSmartCubeSession({
connect: async () => mock.connection,
features: replayFeatures,
gyroFrameScheduler: synchronousGyroScheduler,
});
} else {
output = createOutputSession(mock.connection, replayFeatures);
current = output;
}
bind();
};
rebuild();
const emit = (index: number): void => {
const item = items[index];
Iif (!item) return;
if (feed === 'connection' && item.event && isSmartCubeEvent(item.event)) mock.emit(item.event);
if (feed === 'session') {
if (item.event && isSmartCubeSessionEvent(item.event)) output?.emit(item.event);
if (item.status) output?.setReplayStatus(item.status);
}
};
const ensureConnected = async (): Promise<void> => {
if (!current.getState().connection) await current.connect();
};
const run = async (indices: readonly number[], generation: number): Promise<void> => {
Iif (!isCurrent(generation)) return;
await ensureConnected();
Iif (!isCurrent(generation)) return;
indices.forEach(emit);
notifyCursor();
};
const session: SmartCubeSession = {
getState: () => current.getState(),
subscribe(listener: (state: SmartCubeSessionState) => void) {
return states.subscribe(listener);
},
subscribeEvents(listener: (event: SmartCubeSessionEvent) => void) {
return events.subscribe(listener);
},
subscribeDiagnostics(listener: (event: SmartCubeSessionDiagnostic) => void) {
return diagnostics.subscribe(listener);
},
on(type, listener) {
return this.subscribeEvents((event) => {
if (event.type === type) listener(event as never);
});
},
connect: () => current.connect(),
disconnect: () => current.disconnect(),
resetGyro: () => current.resetGyro(),
configureFeatures: (patch: Parameters<SmartCubeSession['configureFeatures']>[0]) =>
current.configureFeatures(patch),
sendCommand: (command: SmartCubeCommand) => current.sendCommand(command),
syncFacelets: () => current.syncFacelets(),
sendVendorCommand: (command: SmartCubeVendorCommand) => current.sendVendorCommand(command),
};
return {
session,
get feed(): ReplayFeed {
return feed;
},
get identity(): JsonlMockIdentity {
return replayData.identity;
},
get length(): number {
return items.length;
},
get items(): ReadonlyArray<ReplayItem> {
return items;
},
get position(): number {
return ReplayCursor.position(cursor);
},
get virtualNowMs(): number {
return ReplayCursor.virtualNowMs(cursor);
},
get done(): boolean {
return ReplayCursor.done(cursor, timestamps);
},
subscribeCursor(listener: ReplayListener): () => void {
return cursors.subscribe(listener);
},
/** Fires immediately before a backward seek reconstructs the session. */
subscribeRebuild(listener: ReplayListener): () => void {
return rebuilds.subscribe(listener);
},
async stepOne(): Promise<void> {
return enqueue(async (generation) => {
Iif (!isCurrent(generation)) return;
const [next, index] = ReplayCursor.stepOne(cursor, timestamps);
cursor = next;
await run(index === undefined ? [] : [index], generation);
});
},
async advanceTo(targetMs: number): Promise<void> {
return enqueue(async (generation) => {
Iif (!isCurrent(generation)) return;
const [next, indices] = ReplayCursor.advanceTo(cursor, timestamps, targetMs);
cursor = next;
await run(indices, generation);
});
},
async seekTo(index: number): Promise<void> {
return enqueue(async (generation) => {
if (!isCurrent(generation)) return;
const target = Math.max(0, Math.min(index, items.length));
const currentPosition = ReplayCursor.position(cursor);
// Forward seeks can continue the current deterministic session. Only
// backward seeks need a clean connection/session plus prefix replay.
if (target >= currentPosition) {
const forward = Array.from(
{ length: target - currentPosition },
(_, offset) => currentPosition + offset,
);
cursor = ReplayCursor.seekTo(timestamps, target);
await run(forward, generation);
return;
}
rebuild(true);
const prefix = Array.from({ length: target }, (_, itemIndex) => itemIndex);
cursor = ReplayCursor.seekTo(timestamps, target);
await run(prefix, generation);
});
},
async seekToTimestamp(timestamp: number): Promise<void> {
const index = timestamps.findIndex((candidate) => candidate > timestamp);
await this.seekTo(index === -1 ? items.length : index);
},
async reset(): Promise<void> {
await this.seekTo(0);
},
};
}
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