Reactjs 重置不更改状态形状的redux增强器

我创建了以下redux增强器，可以随时拍摄状态快照并回滚：

export const resetable = (reducer: Function) => {
  const initialState = { current: reducer(undefined, {}), previous: undefined };

  return (state = initialState, action: Action) => {
    switch (action.type) {
      case ActionTypes.SaveSnapShot:
        return { ...state, previous: state.current };
      case ActionTypes.Rollback:
        return { ...state, current: state.previous, previous: undefined };
      case ActionTypes.Commit:
        return { ...state, previous: undefined };
      default:
        return {
          ...state,
          current: reducer(state.current, action)
        };
    }
  };
};

其用法如下：

export default function createReducer() {
  return combineReducers({
    key: resetable(reducer),
  });
}

{
  contact: {
    firstName: 'Bob',
    lastName: 'Conman'
  }
}

问题是，它会改变传入减速器状态的形状

例如，如果我有这样的状态：

export default function createReducer() {
  return combineReducers({
    key: resetable(reducer),
  });
}

{
  contact: {
    firstName: 'Bob',
    lastName: 'Conman'
  }
}

然后它将

当前

和

上一个

键添加到状态

因此，国家成为：

{
  contact: {
    current: {
      firstName: 'Bob',
      lastName: 'Conman'
    },
    previous: undefined
  }
}

在不改变状态形状和添加新密钥的情况下，是否仍可以提供类似的功能