@equinor/fusion-observable/src/operators/map-prop.ts

WIP

import type { OperatorFunction } from 'rxjs';
import { map } from 'rxjs/operators';

import type { NestedKeys, NestedPropType } from '../types';

export const mapProp = <TObject extends Record<string, unknown>, TPath extends NestedKeys<TObject>>(
  path: TPath,
): OperatorFunction<TObject, NestedPropType<TObject, TPath>> =>
  map((obj: TObject) => {
    return String(path)
      .split('.')
      .reduce(
        // eslint-disable-next-line @typescript-eslint/no-explicit-any
        (cur: any, attr: string) => cur[attr],
        obj,
      ) as NestedPropType<TObject, TPath>;
  });

export default mapProp;