Files
HealthLog/src/lib
Marc-André Bombeck e0eaed2251 fix(integrations): one provider account per record, borrowed apps return
A guardian finishing a connect for a managed profile could attach their
own provider account to the profile. Every OAuth callback (Withings,
WHOOP, Fitbit, Google Health, Strava, Polar, Oura) now refuses a
provider account another record already holds with reason
already_linked, shown as its own message on the integrations page.
WHOOP's owner_conflict tag becomes already_linked as well.

Oura keeps the account id of a grant (personal_info, migration 0441) so
the check has something to compare; existing connections fill it at
their next connect.

A disconnect leaves Withings webhook subscriptions and the Strava app
authorisation in place while another record holds the same account,
and the Withings webhook routes an account held twice to the record
that linked it first instead of whichever row a lookup returned.

The provider app copied from a guardian onto a managed profile is now
marked (migration 0442) and removed again on disconnect or when that
guardian no longer holds a live MANAGE grant: revoke, renounce,
removal, handover, account deletion and data wipe. Each removal is
audited as integration.client_app.removed.
2026-10-21 21:18:33 +02:00
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src/lib/

The server and runtime toolkit. Everything that is not a page, component, or route handler lives here: the API kit, auth, crypto, the rollup tier, AI providers, notifications, background jobs, and the integration clients. Route handlers and RSC pages compose these modules; the modules never reach back into app/.

Core request kit

  • api-handler.ts — the apiHandler wrapper every route uses. Auth resolver (cookie OR Bearer), requireAuth / requireAdmin (admin is cookie-only by construction), idempotency plumbing, Wide-Event builder, GlitchTip forwarder.
  • api-response.ts — the { data, error, meta? } envelope: apiSuccess / apiError, safeJson, trusted-proxy IP resolver, returnAllZodIssues + sanitiseZodIssues.
  • rate-limit.ts — Postgres-backed sliding-window limiter (single atomic upsert); multi-instance correct.
  • idempotency.ts — user-scoped idempotency keys that refuse to cache secret-shaped responses.
  • query-keys/ — the only legal source of TanStack Query queryKey / mutationKey arrays (enforced by an ESLint rule); per-feature files behind the index.ts barrel.
  • safe-fetch.ts — the one documented outbound-egress entry (redirect: "manual" + timeout; optional connect-time DNS-rebinding pin). Raw fetch( under lib/ + app/ is banned by ESLint.
  • db.ts — the Prisma client singleton.
  • crypto.ts — AES-256-GCM at rest with versioned key ids, fail-closed loader, rotation primitives.

Subsystems

  • auth/ — Postgres sessions, secure-cookie flag policy, passkey (WebAuthn) + Argon2id password, per-device refresh-token rotation, HMAC Bearer tokens.
  • ai/ — multi-provider insight + Coach engine: provider-chain.ts, hand-rolled {openai,anthropic,local,codex,mock}-client.ts, coach/, prompts/, citation + confidence helpers.
  • rollups/ — DAY/WEEK/MONTH/YEAR pre-aggregations for measurements, mood, and medication compliance. Read-swap pattern: probe the rollup, fall back to live SQL on a coverage miss.
  • notifications/ — the dispatcher cascade (APNs → Telegram → ntfy → Web Push), per-channel senders/, retry policy, VAPID config.
  • jobs/ — pg-boss workers: reminders, insight pre-generation, backups, retention sweeps, integration backfills. Recurring work belongs here, not in scripts/.
  • integrations/, withings/, whoop/, fitbit/ — OAuth clients and sync services for the device providers; sync/ holds the shared delta-feed plumbing.
  • analytics/ — trend calculations, cadence-aware medication compliance.ts, correlations.
  • insights/, fhir/, doctor-report-*.ts — insight pipeline, FHIR R4 export, client-side doctor-report PDF.
  • openapi/ — Zod registry that is the source of truth for docs/api/openapi.yaml.
  • logging/, observability/, monitoring/ — Wide-Event transports and the central redaction denylists (redact at the egress boundary, not the call site).
  • validations/ — shared Zod schemas, including the SSRF isPublicUrl floor.
  • i18n/, tz/ + timezone.ts, format*.ts — translations, timezone helpers (Berlin for display, UTC in DB), locale formatting.

Conventions

Kebab-case filenames. See ../../CLAUDE.md "Code conventions" and "Security-relevant patterns"; the critical-files map there cites the exact entry points. Most modules carry tests in a sibling __tests__/.