/*
 * Copyright (c) 2021-2022 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.
 */

export class CheckEmptyUtils {

  /**
     * Check obj is empty.
     *
     * @param {Object} obj need checked object
     * @return {boolean} true(empty)
     */
  static isEmpty(obj) {
    return (typeof obj === 'undefined' || obj === null || obj === '' || Object.keys(obj).length === 0);
  }

  /**
     * Check str is empty.
     *
     * @param {string} str need checked string
     * @return {boolean} true(empty)
     */
  static checkStrIsEmpty(str) {
    return str.trim().length === 0;
  }

  /**
     * Check array is empty.
     *
     * @param {Array} arr need checked array
     * @return {boolean} true(empty)
     */
  static isEmptyArr(arr) {
    return arr.length === 0;
  }
}