Usage

const car = callable(
  {
    wheels: 2,
  },
  (self) => () => {
    return "driving";
  },
);

car.wheels; // => 2
car(); // => 'driving'

Installation

CLI

npx atmx add helper callable

Manually

Copy and paste the following method into @/utils/helpers/callable.ts:

/**
* Make an object callable. Given an object and a function the
* returned object will be a function with all the objects properties.
*
* @example
* const car = callable({
*   wheels: 2
* }, self => () => {
*   return 'driving'
* })
*
* car.wheels // => 2
* car() // => 'driving'
*/
export function callable<
TValue,
TObj extends Record<string | number | symbol, TValue>,
TFunc extends (...args: any) => any,
>(obj: TObj, fn: (self: TObj) => TFunc): TObj & TFunc {
return new Proxy(Object.assign(fn.bind(null), obj), {
get: (target, key: string) => target[key],
set: (target, key: string, value: any) => {
  (target as any)[key] = value;
  return true;
},
apply: (target, _, args) => fn(Object.assign({}, target))(...args),
}) as unknown as TObj & TFunc;
}