Smart version of linkStoreWithDb

linkStoreWithDb.js

const linkStoreWithDb = (fromDb, fromStore) => {
  return (db, store) => {
    const unlinkFromDb = fromDb && fromDb(db, store.dispatch);
    const unlinkFromStore = fromStore && store.subscribe(() => fromStore(store.getState, db));
    
    const unlink = () => {
      unlinkFromDb && unlinkFromDb();
      unlinkFromStore && unlinkFromStore();
    }
    return unlink;
  }
}