convert open-composer mixin to es6

app/assets/javascripts/discourse/mixins/open-composer.js.es6

@@ -1,14 +1,8 @@
-/**
-  This mixin allows a route to open the composer
+// This mixin allows a route to open the composer
 
-  @class Discourse.OpenComposer
-  @extends Ember.Mixin
-  @namespace Discourse
-  @module Discourse
-**/
-Discourse.OpenComposer = Em.Mixin.create({
+export default Ember.Mixin.create({
 
-  openComposer: function(controller) {
+  openComposer(controller) {
     this.controllerFor('composer').open({
       categoryId: controller.get('category.id'),
       action: Discourse.Composer.CREATE_TOPIC,
@@ -17,13 +11,13 @@ Discourse.OpenComposer = Em.Mixin.create({
     });
   },
 
-  openComposerWithParams: function(controller, title, body, category_id, category) {
+  openComposerWithParams(controller, topicTitle, topicBody, topicCategoryId, topicCategory) {
     this.controllerFor('composer').open({
       action: Discourse.Composer.CREATE_TOPIC,
-      topicTitle: title,
-      topicBody: body,
-      topicCategoryId: category_id,
-      topicCategory: category,
+      topicTitle,
+      topicBody,
+      topicCategoryId,
+      topicCategory,
       draftKey: controller.get('draft_key'),
       draftSequence: controller.get('draft_sequence')
     });

app/assets/javascripts/discourse/routes/application.js.es6

@@ -1,4 +1,5 @@
 import showModal from 'discourse/lib/show-modal';
+import OpenComposer from "discourse/mixins/open-composer";
 
 function unlessReadOnly(method) {
   return function() {
@@ -10,7 +11,7 @@ function unlessReadOnly(method) {
   };
 }
 
-const ApplicationRoute = Discourse.Route.extend(Discourse.OpenComposer, {
+const ApplicationRoute = Discourse.Route.extend(OpenComposer, {
 
   siteTitle: Discourse.computed.setting('title'),
 

app/assets/javascripts/discourse/routes/discovery-categories-route.js.es6

@@ -1,7 +1,8 @@
 import ShowFooter from 'discourse/mixins/show-footer';
 import showModal from 'discourse/lib/show-modal';
+import OpenComposer from "discourse/mixins/open-composer";
 
-Discourse.DiscoveryCategoriesRoute = Discourse.Route.extend(Discourse.OpenComposer, ShowFooter, {
+Discourse.DiscoveryCategoriesRoute = Discourse.Route.extend(OpenComposer, ShowFooter, {
   renderTemplate() {
     this.render('navigation/categories', { outlet: 'navigation-bar' });
     this.render('discovery/categories', { outlet: 'list-container' });

app/assets/javascripts/discourse/routes/discovery.js.es6

@@ -4,8 +4,9 @@
 **/
 
 import ShowFooter from "discourse/mixins/show-footer";
+import OpenComposer from "discourse/mixins/open-composer";
 
-const DiscoveryRoute = Discourse.Route.extend(Discourse.ScrollTop, Discourse.OpenComposer, ShowFooter, {
+const DiscoveryRoute = Discourse.Route.extend(Discourse.ScrollTop, OpenComposer, ShowFooter, {
   redirect: function() { return this.redirectIfLoginRequired(); },
 
   beforeModel: function(transition) {