function Message() { Object.defineProperties( this, { data: { enumerable: true, get: getData, set: setData }, type: { enumerable: true, get: getType, set: setType }, load:{ enumerable:true, writable:false, value:parse }, JSON: { enumerable: true, get: getJSON } } ); var type = ''; var data = {}; function getType() { return type; } function getData() { return data; } function getJSON() { return JSON.stringify( { type: type, data: data } ); } function setType(value) { type = value; } function setData(value) { data = value; } function parse(message){ try{ var message=JSON.parse(message); type=message.type; data=message.data; }catch(err){ var badMessage=message; type='error', data={ message:'Invalid JSON response format', err:err, response:badMessage } } } } module.exports=Message;