| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 function reorder(list, startIndex, endIndex) { |
| const result = [...list]; |
| const [removed] = result.splice(startIndex, 1); |
| result.splice(endIndex, 0, removed); |
| |
| return result; |
| } |
| |
| export default function reorderItem({ entitiesMap, source, destination }) { |
| const current = [...entitiesMap[source.id].children]; |
| const next = [...entitiesMap[destination.id].children]; |
| const target = current[source.index]; |
| |
| // moving to same list |
| if (source.id === destination.id) { |
| const reordered = reorder(current, source.index, destination.index); |
| |
| const result = { |
| ...entitiesMap, |
| [source.id]: { |
| ...entitiesMap[source.id], |
| children: reordered, |
| }, |
| }; |
| |
| return result; |
| } |
| |
| // moving to different list |
| current.splice(source.index, 1); // remove from original |
| next.splice(destination.index, 0, target); // insert into next |
| |
| const result = { |
| ...entitiesMap, |
| [source.id]: { |
| ...entitiesMap[source.id], |
| children: current, |
| }, |
| [destination.id]: { |
| ...entitiesMap[destination.id], |
| children: next, |
| }, |
| }; |
| |
| return result; |
| } |