const HomeContext = createContext<IContext>({
  state: defaultState,
  dispatch: () => {}
});
const ContextProvider = ({ urlQuery, pageCode }: IProps) => {
  const initState = getInitState(urlQuery, pageCode);
  const [state, dispatch]: [IHomeState, IDispatch] = useReducer(homeReducer, initState);

  return (
    <HomeContext.Provider value={{ state, dispatch }}>
      <HomeContainer />
    </HomeContext.Provider>
  );
};

const HomeContainer = () => {
const { dispatch, state } = useContext(HomeContext);
...

|-page1
    |-handler   // 處理邏輯的純函數(shù),需進行UT覆蓋
    |-container // 整合數(shù)據(jù)、行為與組件
    |-component // 純UI組件,展示內容與用戶交互,不處理業(yè)務邏輯
    |-store     // 數(shù)據(jù)結構不能超過3層,可使用外部引用、冗余字段的方式降低層級
    |-reducer   // 使用immer返回新的數(shù)據(jù)（immutable data）
    |-...
|-page2
|-...

// 避免dispatch時進行兩次,且定義過多單字段的更新case
// 整合此邏輯后,與頁面上的行為相關聯(lián),利于理解、閱讀
case EFHListAction.updateSpecifyQueryMessage:
    return produce(state, (draft: IFHListState) => {
        draft.specifyQueryMessage = payload as string;
        draft.showSpecifyQueryMessage = true;
    });    
case EFHListAction.updateShowSpecifyQueryMessage:
    return produce(state, (draft: IFHListState) => {
        draft.showSpecifyQueryMessage = payload as boolean;
    });

export function getFilterAndSortResult(
  flightList: IFlightInfo[],
  filterList: IFilterItem[],
  filterShare: boolean,
  filterOnlyDirect: boolean,
  sortType: EFlightSortType
) {
  if (!isValidArray(flightList)) {
    return [];
  }

  const sortFn = getSortFn(sortType);
  const result = flightList.filter(v => doFilter(v, filterList, filterShare, 1, filterOnlyDirect)).sort(sortFn);

  return result;
}

describe(getFilterAndSortResult.name, () => {
  test('getFilterAndSortResult', () => {
    expect(getFilterAndSortResult(flightList, filterList, false, EFlightSortType.PriceAsc)).toEqual(filterSortResult);
  });
});

const OWFlightListContainer = () => {
    // 通過Context獲取數(shù)據(jù)
    const { state, dispatch } = useContext(OWFlightListContext);
    ...

    // 初次加載時進行超時的倒計時
    useOnce(overTimeCountDown);
    ...
    
    // 用戶點擊排序
    const onPressSort = (lastSortType: EFlightSortType, isTimeSort: boolean) => {
        // 引用了handler中的getNextSortType函數(shù)
        const sortType = getNextSortType(lastSortType, isTimeSort);
        dispatch({ type: EOWFlightListAction.updateSortType, payload: sortType });
        
        // 埋點操作
        logSort(state, sortType);
    };
    
    // 渲染展示組件
    return <.../>;
}

/**
 * 根據(jù)對象路徑取值
 * @param target {a: { b: { c: [1] } } }
 * @param path 'a.b.c.0'
 */
export function getVal(target: any, path: string, defaultValue: any = undefined) {
  let ret = target;
  let key: string | undefined = '';
  const pathList = path.split('.');

  do {
    key = pathList.shift();
    if (ret && key !== undefined && typeof ret === 'object' && key in ret) {
      ret = ret[key];
    } else {
      ret = undefined;
    }
  } while (pathList.length && ret !== undefined);

  return ret === undefined || ret === null ? defaultValue : ret;
}

// DEMO
const errorCode = getVal(result, 'rstlist.0.type', 0);

// 在與外部對接時,經常會定義一些固定結構,可擴展性的數(shù)據(jù)列表
// 為了適應此類契約,便于更好的閱讀與維護,總結出了以下函數(shù)
export const GLOBAL_NOTE_CONFIG = {
  2: 'refund',
  3: 'sortType',
  4: 'featureSwitch'
};

/**
 * 根據(jù)配置，獲取attrList中的值，返回json對象類型的數(shù)據(jù)
 * @private
 * @memberof DetailService
 */
export function getNoteValue<T>(
  noteList: Array<T> | undefined | null,
  config: { [_: string]: string },
  keyName: string = 'type'
) {
  const ret: { [_: string]: T | Array<T> } = {};

  if (!isValidArray(noteList!)) {
    return ret;
  }

  //@ts-ignore
  noteList.forEach((note: any) => {
    const typeStr: string = (('' + note[keyName]) as unknown) as string;

    if (!(typeStr in config)) {
      return;
    }

    if (note === undefined || note === null) {
      return;
    }

    const key = config[typeStr];

    // 有多個值時，改為數(shù)組類型
    if (ret[key] === undefined) {
      ret[key] = note;
    } else if (Array.isArray(ret[key])) {
      (ret[key] as T[]).push(note);
    } else {
      const first = ret[key];
      ret[key] = [first, note];
    }
  });

  return ret;
}

// DEMO
// 適用于外部定義的一些可擴展note節(jié)點列表的取值邏輯
const { sortType, featureSwitch } = getNoteValue(list, GLOBAL_NOTE_CONFIG, 'ntype');

/**
 * 獲取用于排序的sort函數(shù)
 * @param fn 同類型元素比較函數(shù)，true為排序優(yōu)先
 */
export function getSort<T>(fn: (a: T, b: T) => boolean): (a: T, b: T) => 1 | -1 | 0 {
  return (a: T, b: T): 1 | -1 | 0 => {
    let ret = 0;

    if (fn.call(null, a, b)) {
      ret = -1;
    } else if (fn.call(null, b, a)) {
      ret = 1;
    }

    return ret as 0;
  };
}

/**
 * 多重排序
 */
export function getMultipleSort<T>(arr: Array<(a: T, b: T) => 1 | -1 | 0>) {
  return (a: T, b: T) => {
    let tmp;
    let i = 0;

    do {
      tmp = arr[i++](a, b);
    } while (tmp === 0 && i < arr.length);

    return tmp;
  };
}

// DEMO
const ageSort = getSort(function(a, b) {
  return a.age < b.age;
});

const nameSort = getSort(function(a, b) {
  return a.name < b.name;
});

const sexSort = getSort(function(a, b) {
  return a.sex && !b.sex;
});

//判斷條件先后順序可調整
const arr = [nameSort, ageSort, sexSort];

const ret = data.sort(getMultipleSort(arr));