Maurice
f02a4b5654
Google charges autocomplete per request unless the requests carry a session token. With one, the keystrokes of a single search and the details lookup that ends it are charged together, which is also how a user experiences it: they looked up one place. TREK sent no token at all, so every debounced keystroke was its own billable request. On a busy trip that is the largest line on the Places bill, and it is paid by whoever owns the key, which for a self-hosted instance is the person running it. A session opens with the first suggestion request and closes when the user picks a result. It has to close on the abandoned paths too: a token carried into the next search would merge two searches into one billed session and scope the suggestions wrongly. So the search box clearing it, the text-search fallback and the error paths all end it. The token is validated on the way in. The autocomplete body goes through the Zod pipe, the details query does not, so the controller shape-checks it there. Anything that does not match Google's URL-safe 36-character form is dropped rather than forwarded, which falls back to per-request billing instead of breaking a lookup. A cached details hit never reaches Google and so never closes its session. That is billing-neutral: an unclosed session is charged as a plain autocomplete session, which is still cheaper than the per-request behaviour it replaces.
@trek/shared
Single source of truth for TREK's API contracts, expressed as Zod schemas and consumed by both the server (request validation + inferred DTO types) and the client (typed requests/responses).
This package is part of the incremental NestJS + React 19 migration (see the "Brownfield Rewrite" board). It is intentionally dormant until modules start importing it — adding it changes nothing for users.
Rules
- One folder per domain:
src/<domain>/<domain>.schema.ts(+.spec.ts). - Domain-agnostic building blocks live in
src/common/. - A route is only considered migrated once its contract lives here.
- Schemas are the source of truth; server DTOs and client types are inferred from them
(
z.infer<typeof schema>), never hand-duplicated.
Consumption (dev)
Both apps resolve @trek/shared to this package's TypeScript source:
- Server (
tsx): viapathsinserver/tsconfig.json. - Client (
vite): viaresolve.aliasinclient/vite.config.ts(+pathsfor the type-checker).
Production packaging (Docker / workspace wiring) is introduced in card F2, when the server first depends on this package at runtime. Until then prod builds are untouched.
Not yet here
The canonical error envelope is finalised in card F5 (it must match TREK's current Express error responses byte-for-byte), so it is deliberately not invented in F1.