openapi-ts-json-schema/dist/utils/makeTsJsonSchema/stringify.js

Generate TypeScript-first JSON schemas from OpenAPI definitions

import { stringify as commentJsonStringify } from 'comment-json';
/**
 * JSON.stringify replacer
 * Replace circular references with {}
 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cyclic_object_value#circular_references
 */
function makeCircularRefReplacer() {
    const ancestors = [];
    return function (key, value) {
        if (typeof value !== 'object' || value === null) {
            return value;
        }
        // `this` is the object that value is contained in,
        // i.e., its direct parent.
        while (ancestors.length > 0 && ancestors.at(-1) !== this) {
            ancestors.pop();
        }
        // @NOTE Should we make recursion depth configurable?
        if (ancestors.includes(value)) {
            return {};
        }
        ancestors.push(value);
        return value;
    };
}
const circularReplacer = makeCircularRefReplacer();
export function stringify(input) {
    return commentJsonStringify(input, circularReplacer, 2);
}