feat: typescript part 1

Co-authored-by: Su-Yong <simssy2205@gmail.com>

config/index.ts

@@ -0,0 +1,57 @@
+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,
+};