Function combineParams

lib/actionUtils.ts:88–118

(a: ParamsA, b: ParamsB)

}

function combineParams<
  ParamsA extends Params,
  ParamsB extends Params,
  OutParams extends ParamsA & ParamsB,
>(a: ParamsA, b: ParamsB): OutParams {
  /** This function combines two objects, with b overwriting a in
   * the case of a clash. **/
  // TODO: Doesn't deal with arrays yet, only deals with nested objects
  let out = { ...a } as unknown as OutParams;

  for (let key in b) {
    if (b.hasOwnProperty(key)) {
      // If key is in both objects and both values are objects,
      //  then recursively combine them
      if (
        typeof b[key] === "object" &&
        b[key] !== null &&
        !Array.isArray(b[key]) &&
        out[key] &&
        typeof out[key] === "object" &&
        !Array.isArray(out[key])
      ) {
        out[key] = combineParams(out[key], b[key]);
      } else {
        // @ts-ignore
        out[key] = b[key];
      }
    }
  }
  return out;
}