/*

 * Copyright (c) 2022-2023 Huawei Device Co., Ltd.

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */



const LARGE_SCREEN_GRID_SUM: number = 12;

const SMALL_SCREEN_GRID_SUM: number = 8;

const VP2PX_SUM_IN_LARGE_SCREEN: number = 2;



class Utils {

  isValid(item: unknown): boolean {

    return item !== null && item !== undefined;

  }



  checkObjPropertyValid<T>(obj: T, tree: string): boolean {

    if (!this.isValid(obj) || !this.isValid(tree)) {

      return false;

    }



    let arr = tree.split('.');

    let tempObj = obj;

    for (let i = 0; i < arr.length; i++) {

      if (!this.isValid(tempObj[arr[i]])) {

        return false;

      } else {

        tempObj = tempObj[arr[i]];

      }

    }

    return true;

  }



  isLargeDevice(): number {

    return vp2px(1) === VP2PX_SUM_IN_LARGE_SCREEN ? LARGE_SCREEN_GRID_SUM : SMALL_SCREEN_GRID_SUM;

  }

}



export default new Utils();