Migrate `onToolbarCreate` to the DiscourseAPI

app/assets/javascripts/discourse/components/d-editor.js.es6

@@ -176,8 +176,13 @@ class Toolbar {
   }
 }
 
-export function onToolbarCreate(func) {
+export function addToolbarCallback(func) {
   _createCallbacks.push(func);
+}
+
+export function onToolbarCreate(func) {
+  console.warn('`onToolbarCreate` is deprecated, use the plugin api instead.');
+  addToolbarCallback(func);
 };
 
 export default Ember.Component.extend({

app/assets/javascripts/discourse/initializers/enable-emoji.js.es6

@@ -1,4 +1,4 @@
-import { onToolbarCreate } from 'discourse/components/d-editor';
+import { withPluginApi } from 'discourse/lib/plugin-api';
 
 export default {
   name: 'enable-emoji',
@@ -7,7 +7,8 @@ export default {
     const siteSettings = container.lookup('site-settings:main');
 
     if (siteSettings.enable_emoji) {
-      onToolbarCreate(toolbar => {
+      withPluginApi('0.1', api => {
+        api.onToolbarCreate(toolbar => {
           toolbar.addButton({
             id: 'emoji',
             group: 'extras',
@@ -16,6 +17,7 @@ export default {
             title: 'composer.emoji'
           });
         });
+      });
 
       // enable plugin emojis
       Discourse.Emoji.applyCustomEmojis();

app/assets/javascripts/discourse/lib/plugin-api.js.es6

@@ -3,6 +3,7 @@ import ComposerEditor from 'discourse/components/composer-editor';
 import { addPosterIcon } from 'discourse/widgets/poster-name';
 import { addButton } from 'discourse/widgets/post-menu';
 import { includeAttributes } from 'discourse/lib/transform-post';
+import { addToolbarCallback } from 'discourse/components/d-editor';
 
 let _decorateId = 0;
 function decorate(klass, evt, cb) {
@@ -86,6 +87,10 @@ class PluginApi {
     addButton(name, callback);
   }
 
+  onToolbarCreate(callback) {
+    addToolbarCallback(callback);
+  }
+
 }
 
 let _pluginv01;

test/javascripts/components/d-editor-test.js.es6

@@ -1,5 +1,5 @@
 import componentTest from 'helpers/component-test';
-import { onToolbarCreate } from 'discourse/components/d-editor';
+import { withPluginApi } from 'discourse/lib/plugin-api';
 
 moduleForComponent('d-editor', {integration: true});
 
@@ -540,7 +540,8 @@ componentTest('emoji', {
   template: '{{d-editor value=value}}',
   setup() {
     // Test adding a custom button
-    onToolbarCreate(toolbar => {
+    withPluginApi('0.1', api => {
+      api.onToolbarCreate(toolbar => {
         toolbar.addButton({
           id: 'emoji',
           group: 'extras',
@@ -548,6 +549,7 @@ componentTest('emoji', {
           action: 'emoji'
         });
       });
+    });
     this.set('value', 'hello world.');
   },
   test(assert) {