json2xml.js

/*      This work is licensed under Creative Commons GNU LGPL License.

        License: http://creativecommons.org/licenses/LGPL/2.1/
        Version: 0.9/modified to conform to commonjs modules pattern
        Author:  Stefan Goessner/2006
        Web:     http://goessner.net/ 
*/

var json2xml = (typeof exports === 'undefined')? {} : exports; // like commonjs

(function() {

        json2xml.convert = function(o) {
           var toXml = function(v, name, ind) {
                  var xml = "";
                  if (v instanceof Array) {
                         for (var i=0, n=v.length; i<n; i++)
                                xml += toXml(v[i], name, ind+"");
                  }
                  else if (typeof(v) == "object") {
                         var hasChild = false;
                         xml += ind + "<" + name;
                         for (var m in v) {
                                if (m.charAt(0) == "@")
                                   xml += " " + m.substr(1) + "=\"" + v[m].toString() + "\"";
                                else
                                   hasChild = true;
                         }
                         xml += hasChild ? ">\n" : "/>";
                         if (hasChild) {
                                for (var m in v) {
                                   if (m == "#text")
                                          xml += makeSafe(v[m]);
                                   else if (m == "#cdata")
                                          xml += "<![CDATA[" + lines(v[m]) + "]]>";
                                   else if (m.charAt(0) != "@")
                                          xml += toXml(v[m], m, ind+"\t");
                                }
                                xml += (xml.charAt(xml.length-1)=="\n"?ind:"") + "</" + name + ">\n";
                         }
                  }
                  else { // added special-character transform, but this needs to be better handled [micmath]
                         xml += ind + "<" + name + ">" + makeSafe(v.toString()) +  "</" + name + ">\n";
                  }
                  return xml;
           },
           xml="";
           
           for (var m in o) {
                  xml += toXml(o[m], m, "");
                }
                  
           return xml;
        }
        
        function lines(str) {
                // normalise line endings, all in file will be unixy
                str = str.replace(/\r\n/g, '\n');
                
                return str;
        }
        
        function makeSafe(str) {
                // xml special charaters
                str = str.replace(/</g, '&lt;').replace(/&/g, '&amp;');
                
                return lines(str);
        }

})();