Safe JSON Serializer for Moleculer framework

example.js

const ServiceBroker = require("moleculer");
const SafeJSONSerializer = require("./safe-json-serializer.js");

const broker = new ServiceBroker({
    logger: true,
    serializer: new SafeJSONSerializer()
});

safe-json-serializer.js

"use strict";

const BaseSerializer = require("moleculer").Serializers.Base;
/**
 * Safe JSON serializer for Moleculer
 *
 * @class SafeJSONSerializer
 */
class SafeJSONSerializer extends BaseSerializer {

    /**
     * Serializer a JS object to Buffer
     *
     * @param {Object} obj
     * @param {String} type of packet
     * @returns {Buffer}
     *
     * @memberof Serializer
     */
    serialize(obj) {
        const cache = new WeakSet();
        return JSON.stringify(obj, (key, value) => {
            if (typeof value === "object" && value !== null) {
                if (cache.has(value)) {
                    return "[Circular]";
                }
                cache.add(value);
            }
            return value;
        });
    }

    /**
     * Deserialize Buffer to JS object
     *
     * @param {Buffer} buf
     * @param {String} type of packet
     * @returns {Object}
     *
     * @memberof Serializer
     */
    deserialize(buf) {
        return JSON.parse(buf);
    }
}

module.exports = SafeJSONSerializer;