normalizeRouteForWrite — @gj-kit/expo-workouts

@gj-kit/expo-workouts/core에서 공개하는 function입니다. package version 0.1.1의 release declaration을 그대로 표시합니다.

검증된 import 예제

import { normalizeRouteForWrite } from '@gj-kit/expo-workouts/core';

시그니처, 매개변수, 반환 타입

/**
 * Apply the write-side hygiene the library performs, so you can see what will happen before you call
 * `saveWorkout`. Throws `invalidArgument` for out-of-range coordinates. The rules and their order
 * are §8.2's and are pinned by `tests/fixtures/route-vectors.json`, which also drives the Swift and
 * Kotlin tests.
 *
 * Order (do not reorder — the platforms disagree and this order is what makes them agree):
 *  1. an EMPTY array is `invalidArgument` — say `route: 'none'` instead;
 *  2. non-finite `t`/`lat`/`lon`, or `lat` outside ±90 / `lon` outside ±180, is `invalidArgument`
 *     (rejected, NOT dropped — silently discarding hides a data-corruption signal);
 *  3. points with `hAccM < 0` or `hAccM > 50` are DROPPED (`hAccM === undefined` is kept);
 *  4. points outside `[window.startMs, window.endMs)` are DROPPED — deliberately not clamped:
 *     clamping piles every out-of-window point onto one boundary instant and rule 5 then collapses
 *     them into a single point, i.e. it fabricates timestamps AND destroys more data;
 *  5. sorted ascending by `t`, and for equal `t` the LAST point in input order wins — matching what
 *     HealthKit silently does, so that both platforms agree instead of one throwing.
 *
 * Zero survivors is not an error here: `saveWorkout` reports it as `route: 'dropped'`.
 */
declare function normalizeRouteForWrite(points: readonly RoutePoint[], window: Interval): readonly RoutePoint[];

이 선언은 매개변수, optionality, 제네릭, 반환값, 공개 union/type 계약의 정본입니다. 호출 전 필요한 환경·권한·오류 경계는 패키지 Golden path와 이 subpath의 import 조건을 함께 확인하세요.

Release context

• 패키지: @gj-kit/expo-workouts
• 버전: 0.1.1
• 공개 entry: ./core
• 소스: GitHub

구현 주석

Apply the write-side hygiene the library performs, so you can see what will happen before you call saveWorkout. Throws invalidArgument for out-of-range coordinates. The rules and their order are §8.2’s and are pinned by tests/fixtures/route-vectors.json, which also drives the Swift and Kotlin tests.

Order (do not reorder — the platforms disagree and this order is what makes them agree):

1. an EMPTY array is invalidArgument — say route: 'none' instead;
2. non-finite t/lat/lon, or lat outside ±90 / lon outside ±180, is invalidArgument (rejected, NOT dropped — silently discarding hides a data-corruption signal);
3. points with hAccM < 0 or hAccM > 50 are DROPPED (hAccM === undefined is kept);
4. points outside [window.startMs, window.endMs) are DROPPED — deliberately not clamped: clamping piles every out-of-window point onto one boundary instant and rule 5 then collapses them into a single point, i.e. it fabricates timestamps AND destroys more data;
5. sorted ascending by t, and for equal t the LAST point in input order wins — matching what HealthKit silently does, so that both platforms agree instead of one throwing.

Zero survivors is not an error here: saveWorkout reports it as route: 'dropped'.