youtube-music/config/index.ts

import Store from 'electron-store';

import defaultConfig from './defaults';
import plugins from './plugins';
import store from './store';

import { restart } from '../providers/app-controls';


const set = (key: string, value: unknown) => {
  store.set(key, value);
};

function setMenuOption(key: string, value: unknown) {
  set(key, value);
  if (store.get('options.restartOnConfigChanges')) {
    restart();
  }
}

// MAGIC OF TYPESCRIPT

type Prev = [never, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
  11, 12, 13, 14, 15, 16, 17, 18, 19, 20, ...0[]]
type Join<K, P> = K extends string | number ?
  P extends string | number ?
    `${K}${'' extends P ? '' : '.'}${P}`
    : never : never;
type Paths<T, D extends number = 10> = [D] extends [never] ? never : T extends object ?
  { [K in keyof T]-?: K extends string | number ?
    `${K}` | Join<K, Paths<T[K], Prev[D]>>
    : never
  }[keyof T] : ''

type FirstKey<T extends string> = T extends `${infer K}.${string}` ? K : T;
type NextKey<T extends string> = T extends `${string}.${infer K}` ? K : T;
type PathValue<T, Key extends string> = (
  T extends object
    ? FirstKey<Key> extends keyof T
      ? PathValue<T[FirstKey<Key>], NextKey<Key>>
      : T
    : T
);
const get = <Key extends Paths<typeof defaultConfig>>(key: Key) => store.get(key) as PathValue<typeof defaultConfig, typeof key>;

export default {
  defaultConfig,
  get,
  set,
  setMenuOption,
  edit: () => store.openInEditor(),
  watch(cb: Parameters<Store['onDidChange']>[1]) {
    store.onDidChange('options', cb);
    store.onDidChange('plugins', cb);
  },
  plugins,
};