Very brief cqrs projection proof of concept in node.js

nodecqrs.js

 function UserWasCreated(id, name){
     this.Event = arguments.callee.name;
     this.UserId=id;
     this.Name=name;
 }

 function UserWasRenamed(id, name){
     this.Event = arguments.callee.name;
     this.UserId=id;
     this.Name=name;
 }



function Retrieve(theclass, history){
    var instance = new theclass();
    instance.loadHistory(history);
    return instance;
}




function Aggregate() {
}
Aggregate.prototype.handle = function(e){this[e.Event](e);};
Aggregate.prototype.loadHistory = function(history){history.forEach(function(e){ this.handle(e);}, this)};





function AddConcept(prototype, concept){
    for (var k in concept) {
        if (concept.hasOwnProperty(k)) {
            prototype[k]=concept[k];
        }
    }
}



 var Username={
     UserWasCreated : function(e){this.Id= e.UserId;this.Name=e.Name;},
     UserWasRenamed : function(e){this.Name=e.Name;}
 }



function User() { }
User.prototype = new Aggregate();

AddConcept(User.prototype, Username)




var hist = [new UserWasCreated(1, "Philip"),new UserWasRenamed(1, "Ph. Jander")];

var user = Retrieve(User, hist);

console.log(user.Name);