application_route.js

(function() {
  'use strict';

  ToDonts.ApplicationRoute = Ember.Route.extend(Ember.SimpleAuth.ApplicationRouteMixin, {
    beforeModel: function(transition) {
      var currentUser = this.get('currentUser');
      
      currentUser.reload();
    }
  });
}());

current_user.js

(function() {
  'use strict';

  ToDonts.CurrentUser = Ember.ObjectProxy.extend(Ember.Evented, {
    content: {},

    init: function() {
      var self = this;
      self.bindToSessionEvents();
    },

    reload: function() {
      var self = this;
      var session = this.container.lookup('ember-simple-auth:session:current');
      var authenticated = session.get('isAuthenticated');

      if(authenticated) {
        Ember.$.getJSON('/api/users/me', function(data) {
          self.setProperties({ content: data.current_user });
        });

        this.trigger('todonts:current_user_reloaded');
      }
    },

    clear: function() {
      this.setProperties({ content: {} });
      this.trigger('todonts:current_user_cleared');
    },

    bindToSessionEvents: function() {
      var self = this;
      var session = this.container.lookup('ember-simple-auth:session:current');

      session.off('ember-simple-auth:session-authentication-succeeded');
      session.on('ember-simple-auth:session-authentication-succeeded', function(content) {
        console.log('Reloading current user: session authentication succeeded');
        self.reload();
      });

      session.off('ember-simple-auth:session-authentication-failed');
      session.on('ember-simple-auth:session-authentication-failed', function(content) {
        console.log('Clearing current user: session authentication failed');
        self.clear();
      });

      session.off('ember-simple-auth:session-invalidation-succeeded');
      session.on('ember-simple-auth:session-invalidation-succeeded', function(content) {
        console.log('Clearing current user: session invalidation succeeded');
        self.clear();
      });

      session.off('ember-simple-auth:session-invalidation-failed');
      session.on('ember-simple-auth:session-invalidation-failed', function(content) {
        console.log('Clearing current user: session invalidation failed');
        self.clear();
      });
    }
  });
}());

current_user_initializer.js

//= require ../../lib/current_user

(function() {
  'use strict';

  ToDonts.initializer({
    name: 'currentUser',
    after: 'authentication',
    initialize: function(container, application) {
      var currentUser = ToDonts.CurrentUser.create({ container: container });

      container.register('todonts:current_user', currentUser, { instantiate: false });
      Ember.A(['model', 'controller', 'view', 'route']).forEach(function(component) {
        container.injection(component, 'currentUser', 'todonts:current_user');
      });
    }
  });
}());