User.js

var User = React.createClass({
  
  statics: {
    
    willTransitionTo: function (transition, params, query) {
      // possibly cancel the transition to a page
    },
    
    willTransitionFrom: function (transition, component) {
      // possibly cancel the transition away from a page
    },
    
    didTransitionTo: function (params, query, setProps) {
      // register data subscribers. call setProps as you get new data.
      // works beautifully client-side
  
      // TODO: how do we know if we need to subscribe to data or if
      // we just need a one-time fetch for server rendering?
    },
    
    didTransitionFrom: function () {
      // unregister data subscribers  
    },
    
    shouldRenderComponent: function (props) {
      // given the current set of props, return true if you've got
      // everything you need to render your markup
      
      // Maybe when the user finally returns true here we automatically
      // call didTransitionFrom so they can tear everything down?
    }
    
  }

});