src.app.shared.clonable.ts Maven / Gradle / Ivy
/**
* Copyright 2017-2023 Enedis
*
* 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 abstract class Clonable {
abstract clone(): T;
}
// Unlike classes, interfaces exist only at compile-time. It is not possible to do a common instanceof check
export function instanceOfClonable(obj: any): obj is Clonable {
return 'clone' in obj;
}
export function cloneAsPossible(val: any): any {
if (val == null) return val;
if (typeof val === 'object') {
if (val instanceof Array) {
const result = [];
val.forEach((child) => {
result.push(cloneAsPossible(child));
});
return result;
}
if (val instanceof Map) {
const result = new Map();
val.forEach((value, key) => {
result.set(cloneAsPossible(key), cloneAsPossible(value));
});
return result;
}
if (instanceOfClonable(val)) return val.clone();
}
return val;
}