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46 lines
1.7 KiB
TypeScript
46 lines
1.7 KiB
TypeScript
/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/**
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* A Stringify function that will not crash when it runs into circular JSON references,
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* unlike JSON.stringify. Any circular references are simply omitted, as if there had
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* been no data present
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* @param object any JSON object to be stringified
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*/
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export function safeStringify(object: any): string {
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const cache = new Set();
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return JSON.stringify(object, (key, value) => {
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if (typeof value === 'object' && value !== null) {
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if (cache.has(value)) {
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// We've seen this object before
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try {
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// Quick deep copy to duplicate if this is a repeat rather than a circle.
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return JSON.parse(JSON.stringify(value));
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} catch (err) {
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// Discard key if value cannot be duplicated.
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return; // eslint-disable-line consistent-return
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}
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}
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// Store the value in our cache.
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cache.add(value);
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}
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return value;
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});
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}
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