Lightweight JSON to XML translator

json2xml.js

module.exports = function json2xml(obj) {
    var str = '';
    for(var key in obj) {
        str += __json2xml(key, obj[key]);
    }
    return str;
};

function __json2xml(parrent, props) {
    if(typeof props !== 'object') {
        if(props === undefined || props === null || props === '') return ('<' + parrent + ' />');
        return ('<' + parrent + ' >' + props + '</' + parrent + ' >');
    }
    else {
        if(Array.isArray(props) && props.length > 0) {
            return props.reduce(function(xmlStr, val) {
                xmlStr += __json2xml(parrent, val);
                return xmlStr;
            }, '');
        }
        else {
            var xml = {
                parrent: parrent,
                attr: [],
                children: [],
                value: null
            };

            for(var key in props) {
                if(key.match(/^\@/)) {
                    xml.attr.push(key + '=\"' + props[key] + '\"');
                }
                else if(key === 'value') {
                    xml.value = props[key];
                }
                else {
                    xml.children.push(__json2xml(key, props[key]));
                }
            }
            return '<' + parrent + ' ' + xml.attr.join(' ') + ' >' + 
                (xml.value ? xml.value : xml.children.join(' ')) + 
                '</' + parrent + ' >';
        }
    }
}