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

OpenAPI to JSON schema generator with TypeScript in mind

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.makeCircularRefReplacer = void 0;
const getId_1 = require("./getId");
/**
 * 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)) {
            const id = (0, getId_1.getId)(value);
            return {
                // Drop an inline comment about recursion interruption
                [Symbol.for('before')]: [
                    {
                        type: 'LineComment',
                        value: ` Circular recursion interrupted. Schema id: "${id}"`,
                    },
                ],
            };
        }
        ancestors.push(value);
        return value;
    };
}
exports.makeCircularRefReplacer = makeCircularRefReplacer;