1/*
2 * Copyright (c) 2022-2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16const LARGE_SCREEN_GRID_SUM: number = 12;
17const SMALL_SCREEN_GRID_SUM: number = 8;
18const VP2PX_SUM_IN_LARGE_SCREEN: number = 2;
19
20class Utils {
21  isValid(item: unknown): boolean {
22    return item !== null && item !== undefined;
23  }
24
25  checkObjPropertyValid<T>(obj: T, tree: string): boolean {
26    if (!this.isValid(obj) || !this.isValid(tree)) {
27      return false;
28    }
29
30    let arr = tree.split('.');
31    let tempObj = obj;
32    for (let i = 0; i < arr.length; i++) {
33      if (!this.isValid(tempObj[arr[i]])) {
34        return false;
35      } else {
36        tempObj = tempObj[arr[i]];
37      }
38    }
39    return true;
40  }
41
42  isLargeDevice(): number {
43    return vp2px(1) === VP2PX_SUM_IN_LARGE_SCREEN ? LARGE_SCREEN_GRID_SUM : SMALL_SCREEN_GRID_SUM;
44  }
45}
46
47export default new Utils();