/* * Copyright 2018-2022 Elyra Authors * * 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. */ import { DeepPartial } from "redux"; function isPlainObject(item: any) { return item && typeof item === "object" && item.constructor === Object; } export function deepmerge<T>(target: T, source: DeepPartial<T>) { const output = { ...target }; if (isPlainObject(target) && isPlainObject(source)) { for (let _key of Object.keys(source)) { const key = _key as keyof DeepPartial<T>; const tVal = target[key]; const sVal = source[key] as DeepPartial<typeof tVal>; if (sVal !== undefined) { if (isPlainObject(sVal) && tVal !== undefined) { output[key] = deepmerge<typeof tVal>(tVal, sVal); } else { output[key] = sVal as T[keyof T]; } } } } return output; }