| /** |
| * 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. |
| */ |
| |
| /** |
| * A Stringify function that will not crash when it runs into circular JSON references, |
| * unlike JSON.stringify. Any circular references are simply omitted, as if there had |
| * been no data present |
| * @param object any JSON object to be stringified |
| */ |
| export function safeStringify(object: any): string { |
| const cache = new Set(); |
| return JSON.stringify(object, (key, value) => { |
| if (typeof value === 'object' && value !== null) { |
| if (cache.has(value)) { |
| // We've seen this object before |
| try { |
| // Quick deep copy to duplicate if this is a repeat rather than a circle. |
| return JSON.parse(JSON.stringify(value)); |
| } catch (err) { |
| // Discard key if value cannot be duplicated. |
| return; // eslint-disable-line consistent-return |
| } |
| } |
| // Store the value in our cache. |
| cache.add(value); |
| } |
| return value; |
| }); |
| } |
