Michael Lando | efa037d | 2017-02-19 12:57:33 +0200 | [diff] [blame^] | 1 | /*- |
| 2 | * ============LICENSE_START======================================================= |
| 3 | * SDC |
| 4 | * ================================================================================ |
| 5 | * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved. |
| 6 | * ================================================================================ |
| 7 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 8 | * you may not use this file except in compliance with the License. |
| 9 | * You may obtain a copy of the License at |
| 10 | * |
| 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | * |
| 13 | * Unless required by applicable law or agreed to in writing, software |
| 14 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | * See the License for the specific language governing permissions and |
| 17 | * limitations under the License. |
| 18 | * ============LICENSE_END========================================================= |
| 19 | */ |
| 20 | |
| 21 | const JSONPointer = { |
| 22 | |
| 23 | extractParentPointer(pointer) { |
| 24 | return pointer.replace(/\/[^\/]+$/, ''); |
| 25 | }, |
| 26 | |
| 27 | extractLastPart(pointer) { |
| 28 | const [,lastPart] = pointer.match(/\/([^\/]+)$/) || []; |
| 29 | return lastPart; |
| 30 | }, |
| 31 | |
| 32 | extractParts(pointer) { |
| 33 | return pointer.split('/').slice(1) |
| 34 | .map(part => part.replace(/~1/g, '/')) |
| 35 | .map(part => part.replace(/~0/g, '~')); |
| 36 | }, |
| 37 | |
| 38 | getValue(object, pointer) { |
| 39 | let parts = JSONPointer.extractParts(pointer); |
| 40 | return parts.reduce((object, part) => object && object[part], object); |
| 41 | }, |
| 42 | |
| 43 | setValue(object, pointer, value) { |
| 44 | let clone = obj => Array.isArray(obj) ? [...obj] : {...obj}; |
| 45 | |
| 46 | let parts = JSONPointer.extractParts(pointer), |
| 47 | newObject = clone(object), |
| 48 | subObject = object, |
| 49 | subNewObject = newObject; |
| 50 | |
| 51 | for(let i = 0, n = parts.length - 1; i < n; ++i) { |
| 52 | let nextSubObject = subObject && subObject[parts[i]]; |
| 53 | subNewObject = subNewObject[parts[i]] = nextSubObject ? clone(nextSubObject) : {}; |
| 54 | subObject = nextSubObject; |
| 55 | } |
| 56 | subNewObject[parts[parts.length - 1]] = value; |
| 57 | |
| 58 | return newObject; |
| 59 | } |
| 60 | }; |
| 61 | |
| 62 | export default JSONPointer; |