Files
HealthLog/src/lib/fitbit/sync.ts
T
Marc-André Bombeck a70139c16a chore(release): v1.28.32 — Fitbit re-keyed re-imports can no longer be silently dropped
Single-fix release mirroring the Google Health natural-key rescue from
v1.28.28 into the Fitbit sync. The measurements natural-key unique index
(user, type, measured_at, source, sleep_stage — NULLS NOT DISTINCT,
migration 0055) covers tombstoned rows, so a re-import carrying NEW
externalIds for previously-removed rows collided on the natural key and
skipDuplicates dropped the insert silently. Every planned create now gets
a second chunked probe by natural key with no deletedAt filter; a match —
live or tombstoned — is updated in place with the fresh value, the new
externalId, and deletedAt: null. Probe failure notes the hard-failure
ledger so the watermark holds and the next tick retries. No other code
path touched.
2026-07-12 20:30:12 +02:00

954 lines
38 KiB
TypeScript

/**
* Fitbit Web API sync service.
*
* - `getValidToken` decrypts the stored token, refreshes at
* `tokenExpiresAt - 5 min`, and persists the new access token + expiry AND
* the rotated refresh token. Classic Fitbit ROTATES refresh tokens
* (one-time use), so the new `refresh_token` MUST replace the stored one —
* the inverse of the prior Google transport, which did not rotate. The
* persist is a compare-and-swap on the stored ciphertext so two overlapping
* syncs cannot park the connection at reauth (see `persistRotatedToken`).
* - `recordFitbitSyncFailure` / `classificationToFailureKind` map a
* classified API error onto the shared integration-status ledger.
* - `upsertFitbitMeasurements` + `syncUserFitbit` own the write tail (dedup,
* overwrite contract, rollup fold) — reused unchanged across the transport
* fork; only the per-resource fetch/map differs.
* - `chunkDateRanges` slices a deep backfill into the per-endpoint date-range
* windows the classic Web API caps each call at (30 days), so the per-resource
* syncs issue one valid request per window.
*/
import { AsyncLocalStorage } from "node:async_hooks";
import pLimit from "p-limit";
import { prisma } from "@/lib/db";
import type { MeasurementType } from "@/generated/prisma/client";
import { encrypt, decrypt } from "@/lib/crypto";
import { annotate, getEvent } from "@/lib/logging/context";
import {
isReauthRequired,
recordSyncFailure,
recordSyncSuccess,
type FailureKind,
} from "@/lib/integrations/status";
import {
collapseToTypeDayKeys,
recomputeBucketsForMeasurement,
recomputeUserRollups,
} from "@/lib/rollups/measurement-rollups";
import { invalidateStatusInsightsForTypes } from "@/lib/insights/comprehensive-generate";
import { persistRotatedToken } from "@/lib/integrations/oauth-refresh";
import { refreshAccessToken } from "./client";
import { getUserFitbitCredentials } from "./credentials";
import {
FitbitApiError,
classifyFitbitError,
type FitbitClassification,
} from "./response-classifier";
/** Refresh the access token this many ms before `tokenExpiresAt`. */
const TOKEN_REFRESH_BUFFER_MS = 5 * 60 * 1000;
/**
* Delimiter joining `(type, externalId)` into a single dedup map key. A
* control character keeps it unambiguous against any value a real type or
* externalId could contain, while staying a normal printable-safe constant
* (a literal NUL in the source made text tooling treat the file as binary).
*/
const DEDUP_KEY_DELIM = "\u0000";
/**
* Overlap window for the incremental sync, in ms. Fitbit finalises daily
* summaries after the fact (a daily SpO2 / HRV / RHR can settle hours after the
* night), so the default overlap is a full 24 h to make sure the re-rolled row
* is re-fetched on the next tick. Mirrors WHOOP's recovery/sleep overlap.
*/
export const FITBIT_DEFAULT_OVERLAP_MS = 24 * 60 * 60 * 1000;
/**
* How far back a `fullSync` backfill walks. The classic Web API per-endpoint
* range cap (30 days) means a deep backfill issues many requests against the
* tight 150/h budget, so the backfill horizon is bounded to keep one user's
* backfill inside a couple of hourly windows (~12 chunks/resource). One year of
* daily summaries is the launch horizon.
*/
export const FITBIT_BACKFILL_DAYS = 365;
export interface FitbitTokenInfo {
accessToken: string;
connection: { id: string; fitbitUserId: string };
}
/**
* Resolve a valid Fitbit access token for a user, refreshing if it is within
* the 5-minute expiry buffer. Returns null when there is no connection, no
* credentials, or the refresh fails (the failure is recorded so scheduled syncs
* back off).
*
* Classic Fitbit ROTATES refresh tokens (one-time use): every refresh response
* carries a fresh `refresh_token` that invalidates the old one. Persist the new
* access token + expiry AND the new refresh token unconditionally. If a refresh
* response ever omits the new refresh token (a malformed reply), keep the stored
* one rather than wiping it — a blank refresh token would brick every future
* refresh.
*/
export async function getValidToken(
userId: string,
): Promise<FitbitTokenInfo | null> {
const connection = await prisma.fitbitConnection.findUnique({
where: { userId },
});
if (!connection) return null;
const accessToken = decrypt(connection.accessToken);
const refreshToken = decrypt(connection.refreshToken);
if (
connection.tokenExpiresAt.getTime() - TOKEN_REFRESH_BUFFER_MS <
Date.now()
) {
try {
const creds = await getUserFitbitCredentials(userId);
if (!creds) {
getEvent()?.addWarning(
`No Fitbit credentials found for user ${userId} during token refresh`,
);
await recordSyncFailure({
userId,
integration: "fitbit",
kind: "reauth_required",
message: "Fitbit credentials missing — token refresh skipped",
errorCode: "credentials_missing",
});
return null;
}
const newTokens = await refreshAccessToken(refreshToken, creds);
const expiresAt = new Date(Date.now() + newTokens.expires_in * 1000);
// Classic Fitbit ROTATES refresh tokens: the refresh response carries a
// fresh `refresh_token` that replaces the (now-invalid) stored one. Persist
// with a compare-and-swap on the stored ciphertext so a concurrent sync
// that already rotated the token does not get its work clobbered — and so
// THIS caller, if it lost the race, reuses the peer's rotated access token
// instead of parking the connection at reauth. Guard the malformed-reply
// case: if the response omits the new refresh token, keep the existing one
// rather than writing a blank, which would brick every future refresh.
const persistedAccessToken = await persistRotatedToken(
newTokens.access_token,
{
conditionalUpdate: async () => {
const { count } = await prisma.fitbitConnection.updateMany({
// `connection.refreshToken` is the exact ciphertext we read +
// spent; matching it is the CAS guard (a re-encrypt would differ).
where: {
id: connection.id,
refreshToken: connection.refreshToken,
},
data: {
accessToken: encrypt(newTokens.access_token),
tokenExpiresAt: expiresAt,
...(newTokens.refresh_token
? { refreshToken: encrypt(newTokens.refresh_token) }
: {}),
},
});
return count;
},
readPeerAccessToken: async () => {
const fresh = await prisma.fitbitConnection.findUnique({
where: { id: connection.id },
select: { accessToken: true },
});
return fresh ? decrypt(fresh.accessToken) : null;
},
},
);
if (!persistedAccessToken) return null;
return {
accessToken: persistedAccessToken,
connection: {
id: connection.id,
fitbitUserId: connection.fitbitUserId,
},
};
} catch (err) {
getEvent()?.addWarning(
`Fitbit token refresh failed for user ${userId}: ${err}`,
);
await recordFitbitSyncFailure(userId, err);
return null;
}
}
return {
accessToken,
connection: {
id: connection.id,
fitbitUserId: connection.fitbitUserId,
},
};
}
/**
* True when a caught error is a per-endpoint 403 (forbidden). The classic Fitbit
* scopes are granted independently in the consent flow (and intraday needs an
* extra per-app grant), so a 403 on ONE endpoint is a scope gate on THAT metric
* — soft-skip it and keep the connection connected rather than parking the whole
* integration at `error_reauth`. Connection-wide reauth is reserved for a 401
* (token rejected) and a 403 on the token-refresh / profile path (a genuine
* grant revoke), which run outside the per-resource catch blocks. Matters here
* because partial grants are likely across the independent scopes.
*/
export function isCollectionForbidden(err: unknown): boolean {
return err instanceof FitbitApiError && err.httpStatus === 403;
}
/**
* Per-`syncUserFitbit`-cycle counter for collection-403 soft-skips. Scoped by
* AsyncLocalStorage so the count never bleeds across concurrent per-user
* pg-boss jobs. Mirrors the WHOOP `softSkipStorage` tracker.
*/
interface SoftSkipTracker {
count: number;
}
const softSkipStorage = new AsyncLocalStorage<SoftSkipTracker>();
/**
* Per-`syncUserFitbit`-cycle accumulator of the `(type, day)` keys every
* resource's writes touched. Only populated on a `fullSync` backfill (when the
* inline per-day rollup hook is deferred); the orchestrator drains it into ONE
* `recomputeUserRollups(from, to)` pass at the end of the cycle. Scoped by
* AsyncLocalStorage so concurrent per-user jobs never cross-pollinate, mirroring
* the soft-skip tracker.
*/
interface RollupDeferTracker {
keys: Array<{ type: MeasurementType; measuredAt: Date }>;
}
const rollupDeferStorage = new AsyncLocalStorage<RollupDeferTracker>();
/**
* Per-cycle ledger of collection fetches that HARD-failed (non-403). A hard
* failure on one endpoint must not abort its siblings — weight 500ing must not
* suppress body-fat / spo2 / hrv / rhr / respiratory in the same resource — so
* `handleCollectionFetchError` records the failure here and RETURNS instead of
* rethrowing (the old pattern that aborted every endpoint ordered after the bad
* one and stalled the watermark). The orchestrator reads the ledger to keep the
* cycle's verdict honest: any entry ⇒ the run counts as failed, so success is
* NOT stamped and the next tick refetches the window. Ported from Google
* Health's `hardFailStorage`.
*/
interface HardFailTracker {
failures: string[];
}
const hardFailStorage = new AsyncLocalStorage<HardFailTracker>();
/**
* Single-source the per-resource collection-fetch error handling. A 403 on one
* data class soft-skips it (warn + return 0) so sibling resources still sync; a
* soft-skip increments the ambient tracker so `syncUserFitbit` can refuse to
* stamp success on an all-403 grant-revoke cycle that imported nothing.
*
* Anything else records a classified sync failure, notes the collection on the
* ambient hard-fail ledger, and RETURNS 0 — it does NOT rethrow. Every call site
* sits in a per-collection catch, so returning lets the sibling endpoints in the
* same resource keep fetching (one 500 on weight must not kill body-fat / spo2 /
* hrv / rhr / respiratory), while the ledger still fails the cycle so the
* watermark is not stamped past the broken collection.
*/
export async function handleCollectionFetchError(
resource: string,
userId: string,
err: unknown,
): Promise<number> {
if (isCollectionForbidden(err)) {
getEvent()?.addWarning(
`fitbit ${resource} sync skipped for ${userId}: collection 403 (soft-skip)`,
);
const tracker = softSkipStorage.getStore();
if (tracker) tracker.count += 1;
return 0;
}
await recordFitbitSyncFailure(userId, err);
getEvent()?.addWarning(`fitbit ${resource} failed for ${userId}: ${err}`);
const hardTracker = hardFailStorage.getStore();
if (hardTracker) hardTracker.failures.push(resource);
return 0;
}
/**
* Options threaded from `syncUserFitbit` to each per-resource sync. The `start`
* + `end` window is snapshotted ONCE by the orchestrator (a single `lastSyncedAt`
* read + a single `now`) so every resource fetches the same window; no resource
* re-reads `lastSyncedAt` or stamps `markSynced` itself. The per-resource sync
* chunks `[start, end]` into the per-endpoint date-range cap. The orchestrator
* owns the single end-of-cycle `markSynced`.
*/
export interface FitbitResourceSyncOptions {
fullSync?: boolean;
/** The lower bound of the fetch window, snapshotted once by the orchestrator. */
start?: Date;
/** The upper bound of the fetch window (now), snapshotted once. */
end?: Date;
/**
* When true, `upsertFitbitMeasurements` writes the rows but SKIPS the inline
* per-(type,day) DAY-rollup recompute + status-insight invalidate, returning
* the touched type-days to the caller instead. The orchestrator collapses
* them into ONE `recomputeUserRollups(from, to)` pass at the end of a
* `fullSync` cycle, so a multi-year backfill pays a single range-recompute
* rather than thousands of per-day round-trips. The incremental path leaves
* this unset and keeps the inline per-day hook (small touched set, warm read
* on the next tick).
*/
deferRollup?: boolean;
}
/**
* Compute the incremental `start` for a resource sync. `fullSync` walks back the
* bounded backfill horizon (the classic Web API caps each call's date range, so
* an unbounded backfill would blow the 150/h budget). Otherwise start from
* `lastSyncedAt - overlap`, or 30 days back on the very first incremental tick.
*/
export function incrementalStart(
lastSyncedAt: Date | null,
opts: { fullSync?: boolean; overlapMs?: number; now?: Date } = {},
): Date {
const now = opts.now ?? new Date();
if (opts.fullSync) {
return new Date(now.getTime() - FITBIT_BACKFILL_DAYS * 24 * 60 * 60 * 1000);
}
const overlap = opts.overlapMs ?? FITBIT_DEFAULT_OVERLAP_MS;
if (lastSyncedAt) return new Date(lastSyncedAt.getTime() - overlap);
return new Date(now.getTime() - 30 * 24 * 60 * 60 * 1000);
}
/**
* Slice `[start, end]` into consecutive inclusive windows no wider than
* `maxDays` calendar days, the per-endpoint range cap the classic Web API
* enforces. Each window is `{ start, end }` with `end` no later than the overall
* `end`; the per-resource syncs issue one request per window. Returns a single
* window when the span already fits.
*/
export function chunkDateRanges(
start: Date,
end: Date,
maxDays: number,
): Array<{ start: Date; end: Date }> {
const windows: Array<{ start: Date; end: Date }> = [];
if (end.getTime() < start.getTime()) return windows;
const stepMs = maxDays * 24 * 60 * 60 * 1000;
let cursor = start.getTime();
const endMs = end.getTime();
// Guard against a pathological span minting an unbounded loop.
let guard = 0;
const MAX_WINDOWS = 1000;
while (cursor <= endMs && guard < MAX_WINDOWS) {
// Each window spans up to `maxDays` days inclusive, so subtract one day from
// the step to keep the inclusive end inside the cap.
const windowEnd = Math.min(cursor + stepMs - 24 * 60 * 60 * 1000, endMs);
windows.push({ start: new Date(cursor), end: new Date(windowEnd) });
cursor = windowEnd + 24 * 60 * 60 * 1000;
guard += 1;
}
return windows;
}
/**
* One mapped reading destined for a `Measurement` row, with the per-point anchor
* already resolved into a full `externalId`. The per-resource syncs build these
* from the client mappers (`<anchor>:<fieldTag>`). Mirrors WHOOP's
* `WhoopMeasurementUpsert` (no `sleepStage` — sleep lands in W5).
*/
export interface FitbitMeasurementUpsert {
type: string;
value: number;
unit: string;
measuredAt: Date;
externalId: string;
/**
* Per-stage sleep rows carry the `SleepStage` axis so the (up to six) stage
* rows for one night stay distinct under the dedup key; every other row omits
* it (null). W5 (sleep) is the only producer.
*/
sleepStage?: "IN_BED" | "AWAKE" | "ASLEEP" | "REM" | "CORE" | "DEEP" | null;
}
/** Chunk size for the batched `createMany` insert of fresh readings. */
const FITBIT_CREATE_CHUNK = 500;
/**
* Write a batch of mapped Fitbit readings for one user and (unless deferred)
* fold the rollup tier + invalidate status-insight caches once at the end
* (mirrors the WHOOP / Withings sync tail). Returns the count of rows written
* plus the distinct `(type, day)` keys the write touched.
*
* TOMBSTONES RESURRECT: the measurements unique index on
* `(userId, type, source, externalId)` is FULL — it covers soft-deleted rows
* too, so exactly ONE row can ever exist per key, live or tombstoned. An
* earlier revision assumed a partial (live-only) index and skipped tombstoned
* rows in the probe, expecting a fresh insert; in reality `createMany` with
* `skipDuplicates` then hit the tombstoned row's key and dropped the insert
* SILENTLY — once a Fitbit row was soft-deleted, that key could never import
* again (the same wedge shipped live on the Google transport). The probe now
* matches tombstoned rows as well and the update branch clears `deletedAt`:
* Fitbit remains the source of truth for its own rows, so a re-import
* deliberately revives a deleted one. An operator who wants Fitbit data gone
* permanently disconnects the integration rather than deleting rows.
*
* OVERWRITE CONTRACT preserved: a re-fetched daily summary (`stats:`-keyed and
* every other stable per-point anchor) maps to the SAME `externalId`, so the
* probe finds the existing row and takes the in-place update branch (bumping
* `syncVersion` for the iOS LWW reconciler) — never a duplicate.
*
* BATCHING: the existence probe is a single `findMany` over the batch's
* externalIds; fresh rows go through chunked `createMany` (collapsing the N+1
* insert round-trips a deep backfill used to pay), and only the (bounded)
* already-live rows take a per-row `update` for their differing values.
*
* Best-effort on the rollup fold + insight invalidate — a populator hiccup never
* fails the user's sync.
*/
export async function upsertFitbitMeasurements(
userId: string,
readings: FitbitMeasurementUpsert[],
opts: { deferRollup?: boolean } = {},
): Promise<{
imported: number;
touched: Array<{ type: MeasurementType; measuredAt: Date }>;
}> {
if (readings.length === 0) return { imported: 0, touched: [] };
// Probe EVERY existing row (live AND tombstoned) for the batch's externalIds
// in a single query. The full unique index guarantees at most one row per
// `(type, externalId)` key, and a tombstoned match must take the UPDATE
// branch (which clears `deletedAt`) — treating it as absent would plan an
// insert that `skipDuplicates` silently drops against the tombstone's key,
// permanently wedging the key (see TOMBSTONES RESURRECT above).
const externalIds = readings.map((r) => r.externalId);
let rowByKey = new Map<string, { id: string }>();
try {
const existing = await prisma.measurement.findMany({
where: {
userId,
source: "FITBIT",
externalId: { in: externalIds },
},
select: { id: true, type: true, externalId: true },
});
rowByKey = new Map(
existing
.filter((e) => e.externalId !== null)
.map((e) => [
`${e.type}${DEDUP_KEY_DELIM}${e.externalId}`,
{ id: e.id },
]),
);
} catch (err) {
// A probe failure must not strand the whole batch; fall back to treating
// every row as fresh (`skipDuplicates` absorbs the collision on the full
// unique index — those rows simply retry on the next sync tick).
getEvent()?.addWarning(`Fitbit: row probe failed: ${err}`);
}
const toCreate: Array<{
type: MeasurementType;
value: number;
unit: string;
measuredAt: Date;
externalId: string;
sleepStage: FitbitMeasurementUpsert["sleepStage"];
}> = [];
const toUpdate: Array<{
id: string;
r: FitbitMeasurementUpsert;
/** Set when a key-format migration re-keys the row in place (see below). */
reKeyTo?: string;
}> = [];
const touched: Array<{ type: MeasurementType; measuredAt: Date }> = [];
// A batch can carry the same (type, externalId) twice (an overlap re-fetch);
// collapse to last-write-wins so we never emit two creates for one live key.
const plannedCreateKeys = new Set<string>();
for (const r of readings) {
const type = r.type as MeasurementType;
const key = `${type}${DEDUP_KEY_DELIM}${r.externalId}`;
const live = rowByKey.get(key);
if (live) {
toUpdate.push({ id: live.id, r });
} else if (!plannedCreateKeys.has(key)) {
plannedCreateKeys.add(key);
toCreate.push({
type,
value: r.value,
unit: r.unit,
measuredAt: r.measuredAt,
externalId: r.externalId,
sleepStage: r.sleepStage ?? null,
});
} else {
// A duplicate fresh key inside the same batch — overwrite the planned
// create's payload so last-write-wins, matching the prior upsert loop.
const idx = toCreate.findIndex(
(c) => `${c.type}${DEDUP_KEY_DELIM}${c.externalId}` === key,
);
if (idx >= 0) {
toCreate[idx] = {
type,
value: r.value,
unit: r.unit,
measuredAt: r.measuredAt,
externalId: r.externalId,
sleepStage: r.sleepStage ?? null,
};
}
}
}
// ── KEY-FORMAT MIGRATION RESCUE ──────────────────────────────────────────
// measurements carries a SECOND full unique index — the natural key
// `(user_id, type, measured_at, source, sleep_stage)` NULLS NOT DISTINCT
// (migration 0055) — and it covers tombstoned rows too. When an externalId
// FORMAT changes (a re-keyed re-import after an anchor-scheme fix), a
// re-fetched night's fresh rows carry NEW externalIds but the SAME natural
// key as the rows a replace-by-window sweep just tombstoned: the externalId
// probe finds nothing, the insert collides with the tombstone on the natural
// index, and `skipDuplicates` drops it SILENTLY — old row gone, new row
// never written (live incident on the Google transport: a full-history
// re-sync erased a user's sleep). So every planned CREATE gets a second
// probe by natural key; a match — live or tombstoned — is UPDATED in place
// instead: fresh value, the NEW externalId (the migration itself),
// `deletedAt: null`.
if (toCreate.length > 0) {
try {
const rescued = new Set<number>();
const naturalKeyOf = (
type: string,
measuredAt: Date,
stage: FitbitMeasurementUpsert["sleepStage"],
): string => `${type}|${measuredAt.getTime()}|${stage ?? ""}`;
for (let i = 0; i < toCreate.length; i += FITBIT_CREATE_CHUNK) {
const chunk = toCreate.slice(i, i + FITBIT_CREATE_CHUNK);
const rows = await prisma.measurement.findMany({
where: {
userId,
source: "FITBIT",
type: { in: [...new Set(chunk.map((c) => c.type))] },
measuredAt: { in: chunk.map((c) => c.measuredAt) },
},
select: {
id: true,
type: true,
measuredAt: true,
sleepStage: true,
},
});
const byNaturalKey = new Map(
rows.map((row) => [
naturalKeyOf(
row.type,
row.measuredAt,
row.sleepStage as FitbitMeasurementUpsert["sleepStage"],
),
row.id,
]),
);
for (let j = 0; j < chunk.length; j++) {
const c = chunk[j];
const id = byNaturalKey.get(
naturalKeyOf(c.type, c.measuredAt, c.sleepStage),
);
if (id) {
rescued.add(i + j);
toUpdate.push({
id,
r: {
type: c.type,
value: c.value,
unit: c.unit,
measuredAt: c.measuredAt,
externalId: c.externalId,
sleepStage: c.sleepStage,
},
reKeyTo: c.externalId,
});
}
}
}
if (rescued.size > 0) {
for (let i = toCreate.length - 1; i >= 0; i--) {
if (rescued.has(i)) toCreate.splice(i, 1);
}
}
} catch (err) {
// Best-effort: an unresolved natural-key twin only means the insert is
// dropped by `skipDuplicates` as before — note the failure on the
// ambient ledger so the watermark holds and the next tick retries the
// rescue rather than losing the rows for good.
getEvent()?.addWarning(`Fitbit: natural-key rescue probe failed: ${err}`);
const hardTracker = hardFailStorage.getStore();
if (hardTracker) hardTracker.failures.push("measurements:rescue");
}
}
let imported = 0;
// Fresh inserts: chunked `createMany` (server-owned rows, field-by-field).
// `skipDuplicates` guards the partial-unique index in the rare race where a
// concurrent run inserted the same live key between the probe and the write.
for (let i = 0; i < toCreate.length; i += FITBIT_CREATE_CHUNK) {
const chunk = toCreate.slice(i, i + FITBIT_CREATE_CHUNK);
try {
const res = await prisma.measurement.createMany({
data: chunk.map((c) => ({
userId,
type: c.type,
source: "FITBIT" as const,
value: c.value,
unit: c.unit,
measuredAt: c.measuredAt,
externalId: c.externalId,
sleepStage: c.sleepStage,
})),
skipDuplicates: true,
});
imported += res.count;
for (const c of chunk) {
touched.push({ type: c.type, measuredAt: c.measuredAt });
}
} catch (err) {
getEvent()?.addWarning(`Fitbit: failed to create measurements: ${err}`);
}
}
// Existing-row overwrites: per-row update (differing values) on the matched
// id, so the re-fetched daily summary overwrites in place and bumps
// `syncVersion`. `deletedAt: null` rides along unconditionally — a no-op on
// a live row, a deliberate RESURRECTION on a tombstoned one (Fitbit is the
// source of truth for its own rows; see TOMBSTONES RESURRECT above).
for (const { id, r, reKeyTo } of toUpdate) {
try {
await prisma.measurement.update({
where: { id },
data: {
value: r.value,
unit: r.unit,
measuredAt: r.measuredAt,
sleepStage: r.sleepStage ?? null,
deletedAt: null,
// Key-format migration: adopt the fresh externalId in place.
...(reKeyTo ? { externalId: reKeyTo } : {}),
// Surface the server-side mutation to the iOS LWW reconciler.
syncVersion: { increment: 1 },
},
});
touched.push({
type: r.type as MeasurementType,
measuredAt: r.measuredAt,
});
imported++;
} catch (err) {
getEvent()?.addWarning(`Fitbit: failed to update measurement: ${err}`);
}
}
// On a `fullSync` backfill the caller defers the rollup fold: it collapses
// every resource's touched type-days into a SINGLE range-recompute at the end
// of the cycle (thousands of per-day round-trips → one pass). The incremental
// path keeps the inline per-day hook here (small touched set, warm next read).
if (opts.deferRollup) {
const tracker = rollupDeferStorage.getStore();
// Plain loop, never `push(...touched)`: `touched` carries ONE entry PER
// READING, and a full-history batch on a sample-dense account (a
// multi-year heart-rate series is six figures of rows) blows the call
// stack when spread into a single call — the engine caps argument counts.
// The RangeError aborted the whole metrics collection on exactly the
// accounts with the most data.
if (tracker) {
for (const t of touched) tracker.keys.push(t);
}
return { imported, touched };
}
try {
const keys = collapseToTypeDayKeys(touched);
for (const k of keys) {
await recomputeBucketsForMeasurement(userId, k.type, k.measuredAt);
}
invalidateStatusInsightsForTypes(
userId,
keys.map((k) => k.type),
).catch((err) => {
getEvent()?.addWarning(
`fitbit: status-insight invalidate failed for ${userId}: ${err}`,
);
});
} catch (err) {
getEvent()?.addWarning(
`fitbit: rollup recompute failed for ${userId}: ${err}`,
);
}
return { imported, touched };
}
/**
* Stamp `lastSyncedAt = now`. Called ONCE per cycle by `syncUserFitbit` after a
* non-degenerate run — never per resource, so the watermark can't move mid-cycle
* and shrink a later resource's fetch window.
*/
export async function markSynced(userId: string): Promise<void> {
await prisma.fitbitConnection.update({
where: { userId },
data: { lastSyncedAt: new Date() },
});
}
/**
* Full per-user sync across every Fitbit resource. Drives the hourly poll
* catch-all, the manual `/api/fitbit/sync` trigger, and the boot-time backfill
* (`fullSync: true`). Poll-only — there is no Fitbit webhook at launch (Pub/Sub
* deferred), so there is no per-resource webhook enqueue path.
*
* Parks immediately when the connection is at `error_reauth` (the user must
* reconnect first) — returns 0, matching the WHOOP / Withings no-op contract.
*
* Resources: health-metrics (W3), daily-cumulative activity, per-stage sleep,
* and exercise workouts (W5). Each runs independently so a per-resource 403
* (a Restricted bundle the user did not grant) soft-skips only that resource.
*
* WATERMARK: the incremental `[start, end]` window is snapshotted ONCE here
* (from the single `lastSyncedAt` read + a single `now` at the top of the cycle)
* and threaded to every resource, and `markSynced` is stamped ONCE at the end. A
* per-resource read+stamp would let the first resource move `lastSyncedAt` to
* now() so later resources only see the last overlap window — silently dropping
* the gap after an outage longer than the overlap. The full/backfill path passes
* `fullSync: true`, which widens `start` back to the bounded backfill horizon.
*/
export async function syncUserFitbit(
userId: string,
opts: { fullSync?: boolean } = {},
): Promise<number> {
if (await isReauthRequired(userId, "fitbit")) {
getEvent()?.addWarning(
`fitbit sync skipped for ${userId}: parked at error_reauth`,
);
return 0;
}
// Snapshot the incremental window ONCE for the whole cycle. Every resource
// sees the same `[start, end]`; no resource re-reads `lastSyncedAt` mid-cycle.
// A full/backfill run widens `start` back to the bounded backfill horizon.
const connection = await prisma.fitbitConnection.findUnique({
where: { userId },
select: { lastSyncedAt: true },
});
if (!connection) return 0;
const end = new Date();
const start = incrementalStart(connection.lastSyncedAt, {
fullSync: opts.fullSync,
now: end,
});
const resourceOpts: FitbitResourceSyncOptions = {
fullSync: opts.fullSync,
start,
end,
// A backfill walks years of daily summaries — defer the per-(type,day)
// rollup hook on every write and run ONE range-recompute at the end of the
// cycle. The hourly incremental keeps the inline hook (small touched set).
deferRollup: opts.fullSync === true,
};
const [
{ syncUserMetrics },
{ syncUserActivity },
{ syncUserSleep },
{ syncUserWorkout },
] = await Promise.all([
import("./sync-metrics"),
import("./sync-activity"),
import("./sync-sleep"),
import("./sync-workout"),
]);
const resources = [
syncUserMetrics,
syncUserActivity,
syncUserSleep,
syncUserWorkout,
];
const tracker: SoftSkipTracker = { count: 0 };
const deferTracker: RollupDeferTracker = { keys: [] };
const hardFailTracker: HardFailTracker = { failures: [] };
let total = 0;
let anyFailed = false;
await softSkipStorage.run(tracker, async () => {
await hardFailStorage.run(hardFailTracker, async () => {
await rollupDeferStorage.run(deferTracker, async () => {
for (const fn of resources) {
try {
total += await fn(userId, resourceOpts);
} catch (err) {
anyFailed = true;
getEvent()?.addWarning(
`fitbit ${fn.name} failed for ${userId}: ${err}`,
);
}
}
});
});
});
// A collection that hard-failed inside a resource (recorded on the ledger by
// `handleCollectionFetchError` without aborting its siblings) still fails the
// cycle: partial error, no watermark stamp.
if (hardFailTracker.failures.length > 0) anyFailed = true;
// On a `fullSync` backfill the per-write inline rollup hook was deferred; the
// accumulated touched type-days collapse into ONE range-recompute spanning the
// touched days. One pass replaces the thousands of per-(type,day) round-trips a
// deep backfill would otherwise pay (each = an aggregate SELECT + rollup upsert
// + 3 queue sends). Best-effort: a populator hiccup never fails the backfill.
if (opts.fullSync && deferTracker.keys.length > 0) {
try {
const days = collapseToTypeDayKeys(deferTracker.keys);
const types = Array.from(new Set(days.map((k) => k.type)));
const sorted = days
.map((k) => k.measuredAt.getTime())
.sort((a, b) => a - b);
const from = new Date(sorted[0]!);
// The keys are UTC day-starts; extend `to` past the last touched day so
// the aggregator's `< to` upper bound covers it.
const to = new Date(sorted[sorted.length - 1]! + 24 * 60 * 60 * 1000);
await recomputeUserRollups(userId, { types, from, to });
invalidateStatusInsightsForTypes(userId, types).catch((err) => {
getEvent()?.addWarning(
`fitbit: status-insight invalidate failed for ${userId}: ${err}`,
);
});
} catch (err) {
getEvent()?.addWarning(
`fitbit: backfill rollup recompute failed for ${userId}: ${err}`,
);
}
}
// A genuine grant-revoke 403s EVERY collection: each resource soft-skips
// (returns 0, records no failure), so `anyFailed` stays false and `total` is
// 0 — yet the connection is dead until the token-refresh path next catches the
// 401. Don't stamp success when the whole cycle was soft-skipped and nothing
// imported; leave the status as-is so the "looks-healthy" window closes. A
// partial cycle (some rows imported, or at least one resource that did not
// soft-skip) stamps success as normal.
const allSoftSkipped = tracker.count >= resources.length && total === 0;
if (!anyFailed && !allSoftSkipped) {
// Stamp the watermark ONCE for the whole cycle, only on a non-degenerate
// run. Every resource already saw the snapshot `start`, so stamping now()
// here can't shrink a later resource's window.
await markSynced(userId);
await recordSyncSuccess(userId, "fitbit");
}
annotate({
action: { name: "fitbit.sync", details: { imported: total } },
});
return total;
}
/**
* Map a Fitbit response classification onto a `FailureKind` and record it.
* Shared by the token-refresh path and every per-resource catch block.
*/
export async function recordFitbitSyncFailure(
userId: string,
err: unknown,
): Promise<void> {
const message = err instanceof Error ? err.message : String(err);
await recordSyncFailure({
userId,
integration: "fitbit",
kind: classificationToFailureKind(classifyFitbitError(err)),
message,
errorCode:
err instanceof FitbitApiError ? err.httpStatus?.toString() : undefined,
});
}
export function classificationToFailureKind(
classification: FitbitClassification,
): FailureKind {
switch (classification) {
case "reauth_required":
return "reauth_required";
case "persistent":
return "persistent";
case "transient":
return "transient";
case "success":
// A caller asking for the FailureKind of a success is a contract bug;
// surface it as transient so the audit log still records the anomaly.
return "transient";
}
}
/**
* Bounded fan-out width for the hourly Fitbit cohort poll. The cron tick carries
* no `userId`, so the worker resolves every connection and hands the cohort here.
* A small pool (rather than a strict serial loop) means one slow Fitbit response
* can't stall the whole cohort, while the cap keeps the burst of per-user
* resource fetches + rollup writes from crowding the worker's DB pool.
*
* Tuned to 2 for the classic Web API: each per-user cycle issues ~a dozen
* date-range requests against a tight 150 req/h-per-user budget, so a narrower
* pool keeps the concurrent outbound burst (and the DB-write tail behind it)
* modest. The per-user budget is independent, so the cap is about worker
* pressure, not the API ceiling — but 2 keeps both comfortable.
*/
export const FITBIT_POLL_CONCURRENCY = 2;
/**
* Run a Fitbit hourly-poll cohort with bounded concurrency + per-user error
* isolation. Each user's `syncUserFitbit` runs inside the pool; a single user's
* failure (or a slow Google response) is captured through `onUserError` and never
* aborts the rest of the pass. Returns the per-cohort totals for the wide-event
* envelope. Extracted from the worker handler so the concurrency contract is unit
* testable without exporting worker internals.
*/
export async function runFitbitPollCohort(
userIds: string[],
opts: {
concurrency?: number;
sync?: (userId: string) => Promise<number>;
onUserError?: (userId: string, err: unknown) => void;
/** v1.18.1 — invoked after a user's sync lands `imported` measurements,
* so the worker can fire the eventful Vorsorge satisfaction enqueue
* without the fitbit lib reaching into the job layer. */
onUserSynced?: (userId: string, imported: number) => void;
} = {},
): Promise<{ usersSynced: number; measurementsImported: number }> {
const sync = opts.sync ?? ((userId: string) => syncUserFitbit(userId));
const limit = pLimit(opts.concurrency ?? FITBIT_POLL_CONCURRENCY);
let usersSynced = 0;
let measurementsImported = 0;
await Promise.all(
userIds.map((userId) =>
limit(async () => {
try {
// Read the accumulators AFTER the await resolves. A compound
// assignment (`x += await f()`) captures the left value BEFORE the
// await and would lose increments under overlapping pool tasks.
const n = await sync(userId);
measurementsImported = measurementsImported + n;
usersSynced = usersSynced + 1;
opts.onUserSynced?.(userId, n);
} catch (err) {
opts.onUserError?.(userId, err);
}
}),
),
);
return { usersSynced, measurementsImported };
}