16 lines
963 B
TypeScript
16 lines
963 B
TypeScript
import { emptySpeedProbeObservations, sameSpeedMeasurement, type SpeedMeasurementParameters, type SpeedProbeRead } from "@mmapp/contracts"
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type Observations = Pick<SpeedProbeRead, keyof typeof emptySpeedProbeObservations>
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type Pair = { id: string } & SpeedMeasurementParameters
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/** Publish confirmed configuration while preserving the latest snapshot only for the same measurement parameters. */
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export function publishSpeedProbeSnapshots<T extends Pair & Partial<Observations>>(previous: readonly T[], next: readonly T[]) {
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const byId = new Map(previous.map(row => [row.id, row]))
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return next.map(row => {
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const old = byId.get(row.id)
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if (!old || !sameSpeedMeasurement(old, row)) {
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return { ...row, ...emptySpeedProbeObservations }
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}
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const observations = Object.fromEntries(Object.keys(emptySpeedProbeObservations).map(key => [key, old[key as keyof Observations] ?? null])) as Observations
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return { ...row, ...observations }
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})
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}
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