mgm/tool/Tools.js

My generic modules

const moment = require('moment');
const BaseEntity = require('../model/BaseEntity');

module.exports = class Tools {
    static formatDate(date, pattern = 'YYYY-MM-DD HH:mm:ss.SSS') {
        return moment(date).format(pattern);
    }

    static clone(object, clazz) {
        let dest = new clazz();
        let source = JSON.parse(JSON.stringify(object));
        Tools.copyValues(dest, source);
        return dest;
    }

    static copyValues(dest, source) {
        Object.keys(source).forEach(key => {
            if (dest[key] instanceof BaseEntity) {
                let newInstance = new dest[key].constructor();
                Tools.copyValues(newInstance, source[key]);
                dest[key] = newInstance;
            } else if (dest[key] instanceof Array) {
                source[key].forEach((value) => {
                    let newInstance = Tools.newInstance(key.replace(/list/, ''));
                    Tools.copyValues(newInstance, value);
                    dest[key].push(newInstance);
                });
            } else {
                dest[key] = source[key];
            }
        });
    }

    static newInstance(className) {
        return new Function('return new ' + className + '();')();
    }
};