Use Ember.js for the `/u/account-created` path so we can add controls

app/assets/javascripts/discourse/initializers/url-redirects.js.es6

@@ -20,6 +20,8 @@ export default {
       DiscourseURL.rewrite(new RegExp(`^/u/${username}/?$`, "i"), `/u/${username}/activity`);
     }
 
-    DiscourseURL.rewrite(/^\/u\/([^\/]+)\/?$/, "/u/$1/summary");
+    DiscourseURL.rewrite(/^\/u\/([^\/]+)\/?$/, "/u/$1/summary", {
+      exceptions: ['/u/account-created']
+    });
   }
 };

app/assets/javascripts/discourse/lib/url.js.es6

@@ -22,7 +22,12 @@ export function rewritePath(path) {
   const params = path.split("?");
 
   let result = params[0];
-  rewrites.forEach(rw => result = result.replace(rw.regexp, rw.replacement));
+  rewrites.forEach(rw => {
+    if (((rw.opts.exceptions || []).some(ex => path.indexOf(ex) === 0))) {
+      return;
+    }
+    result = result.replace(rw.regexp, rw.replacement);
+  });
 
   if (params.length > 1) {
     result += `?${params[1]}`;
@@ -219,8 +224,8 @@ const DiscourseURL = Ember.Object.extend({
     return this.handleURL(path, opts);
   },
 
-  rewrite(regexp, replacement) {
-    rewrites.push({ regexp, replacement });
+  rewrite(regexp, replacement, opts) {
+    rewrites.push({ regexp, replacement, opts: opts || {} });
   },
 
   redirectTo(url) {

app/assets/javascripts/discourse/routes/account-created.js.es6

@@ -0,0 +1,7 @@
+import PreloadStore from 'preload-store';
+
+export default Ember.Route.extend({
+  setupController(controller) {
+    controller.set('accountCreated', PreloadStore.get('accountCreated'));
+  }
+});

app/assets/javascripts/discourse/routes/app-route-map.js.es6

@@ -64,6 +64,7 @@ export default function() {
   // User routes
   this.route('users', { resetNamespace: true, path: '/u' });
   this.route('password-reset', { path: '/u/password-reset/:token' });
+  this.route('account-created', { path: '/u/account-created' });
   this.route('user', { path: '/u/:username', resetNamespace: true }, function() {
     this.route('summary');
     this.route('userActivity', { path: '/activity', resetNamespace: true }, function() {

app/assets/javascripts/discourse/templates/account-created.hbs

@@ -0,0 +1,3 @@
+<div id='simple-container'>
+  <div class='account-created'>{{{accountCreated.message}}}</div>
+</div>

app/assets/stylesheets/common/base/activation.scss

@@ -7,4 +7,9 @@
   padding: 20px;
   width: 550px;
   margin: 0 auto;
+
+  .account-created {
+    font-size: 16px;
+    line-height: 24px;
+  }
 }

app/controllers/application_controller.rb

@@ -10,6 +10,7 @@ require_dependency 'letter_avatar'
 require_dependency 'distributed_cache'
 require_dependency 'global_path'
 require_dependency 'secure_session'
+require_dependency 'topic_query'
 
 class ApplicationController < ActionController::Base
   include CurrentUser

app/controllers/users_controller.rb

@@ -534,8 +534,10 @@ class UsersController < ApplicationController
   def account_created
     @custom_body_class = "static-account-created"
     @message = session['user_created_message'] || I18n.t('activation.missing_session')
+    store_preloaded("accountCreated", MultiJson.dump(message: @message))
+
     expires_now
-    render layout: 'no_ember'
+    render "default/empty"
   end
 
   def activate_account

app/views/users/account_created.html.erb

@@ -1,9 +0,0 @@
-<div id='simple-container'>
-  <span style="font-size: 16px; line-height: 24px;"><%= @message.html_safe %></span>
-</div>
-
-<%- content_for(:no_ember_head) do %>
-  <%= render_google_universal_analytics_code %>
-<%- end %>
-
-<%= render_google_analytics_code %>

test/javascripts/acceptance/account-created-test.js.es6

@@ -0,0 +1,17 @@
+import { acceptance } from "helpers/qunit-helpers";
+import PreloadStore from 'preload-store';
+
+acceptance("Account Created");
+
+test("account created", () => {
+  visit("/u/account-created");
+  PreloadStore.store('accountCreated', {
+    message: "Hello World"
+  });
+
+  andThen(() => {
+    ok(exists('.account-created'));
+    equal(find('.account-created').text(), "Hello World", "it displays the message");
+  });
+});
+