@fractorysolutions/safe-units/src/unit/base.ts

Type-safe TypeScript units of measure

import { GenericMeasure } from "../measure/genericMeasure";
import { GenericMeasureType } from "../measure/genericMeasureFactory";
import { Measure } from "../measure/numberMeasure";

interface BaseUnitsMap {
  meters: "length";
  kilograms: "mass";
  seconds: "time";
  amperes: "current";
  kelvin: "temperature";
  moles: "substance";
  candelas: "intensity";
  radians: "planeAngle";
  steradians: "solidAngle";
  bits: "memory";
}

export type BaseUnits<N> = {
  [U in keyof BaseUnitsMap]: GenericMeasure<N, { [K in BaseUnitsMap[U]]: "1" }>;
};

export const createBaseUnits = <N>(
  MeasureType: GenericMeasureType<N, any>,
): BaseUnits<N> => ({
  meters: MeasureType.dimension("length", "m"),
  kilograms: MeasureType.dimension("mass", "kg"),
  seconds: MeasureType.dimension("time", "s"),
  amperes: MeasureType.dimension("current", "A"),
  kelvin: MeasureType.dimension("temperature", "K"),
  moles: MeasureType.dimension("substance", "mol"),
  candelas: MeasureType.dimension("intensity", "cd"),
  radians: MeasureType.dimension("planeAngle", "rad"),
  steradians: MeasureType.dimension("solidAngle", "sr"),
  bits: MeasureType.dimension("memory", "b"),
});

export const {
  meters,
  kilograms,
  seconds,
  amperes,
  kelvin,
  moles,
  candelas,
  radians,
  steradians,
  bits,
} = createBaseUnits(Measure);