simplify-response.ts

type Simplify<T> = T extends Function
  ? T
  : T extends Record<string, any>
  ? { [K in keyof T]: Simplify<T[K]> }
  : T;

type Author = {
  lastName: string;
  firstName: string;
};

interface Animal {
  live(): void;
}

type Kid = {
  bark: (a: string) => number;
  qq: {
    sing: (b: symbol) => boolean;
    shout: Shout;
  };
};

type Shout = (a: number, b: boolean, c: string) => Author;
type SomeNestedObject = {
  a: Animal;
  b: string;
  c: { a: Animal; d: Kid; e: { a: Kid; b: Animal } };
};
type SimplifiedObject = Simplify<SomeNestedObject>;