I'm seeking advice on the best practice for adding behavior to an object received as a JSON object.
I have REST services that allow me to define a sort of state machine.
The API defines a /sessions resources. When creating a session via POST /sessions/:id, I receive a JSON object in my controller:
var session = {
"id": "",
"steps": [ ... ]
}
I would like this object to inherit some behavior:
var baseSession = {
"nextStep": function() {... },
"getCurrentStep": function() { ...}
}
My initial thought was to do this:
session.__proto__ = baseSession;
However, using __proto__ doesn't seem like the right approach. Another option would be to duplicate every property in a new object:
function copyOwnProperyTo(origin, obj) {
Object.keys(origin).forEach(function(prop) {
obj[prop] = origin[prop];
});
}
var newSession = Object.create(baseSession);
copyOwnProperyTo(session, newSession);
This solution works but seems a bit heavy to me. Any other suggestions?