Extensibility: data when starting a new discussion

framework/core/js/forum/src/components/composer-discussion.js

@@ -50,14 +50,18 @@ export default class ComposerDiscussion extends ComposerBody {
     return (this.title() || this.content()) && !confirm(this.props.confirmExit);
   }
 
-  onsubmit(content) {
+  data() {
+    return {
+      title: this.title(),
+      content: this.content()
+    };
+  }
+
+  onsubmit() {
     this.loading(true);
     m.redraw();
 
-    var data = {
-      title: this.title(),
-      content: content
-    };
+    var data = this.data();
 
     app.store.createRecord('discussions').save(data).then(discussion => {
       app.composer.hide();

framework/core/src/Core/Commands/StartDiscussionCommand.php

@@ -2,19 +2,16 @@
 
 class StartDiscussionCommand
 {
-    public $title;
-
-    public $content;
-
     public $user;
 
     public $forum;
 
-    public function __construct($title, $content, $user, $forum)
+    public $data;
+
+    public function __construct($user, $forum, $data)
     {
-        $this->title = $title;
-        $this->content = $content;
         $this->user = $user;
         $this->forum = $forum;
+        $this->data = $data;
     }
 }

framework/core/src/Core/Handlers/Commands/StartDiscussionCommandHandler.php

@@ -26,7 +26,7 @@ class StartDiscussionCommandHandler
         // an opportunity to alter the discussion entity based on data in the
         // command they may have passed through in the controller.
         $discussion = Discussion::start(
-            $command->title,
+            array_get($command->data, 'title'),
             $command->user
         );
 
@@ -41,13 +41,9 @@ class StartDiscussionCommandHandler
         // will trigger a domain event that is slightly semantically incorrect
         // in this situation (PostWasPosted), we may need to reconsider someday.
         $post = $this->bus->dispatch(
-            new PostReplyCommand($discussion->id, $command->content, $command->user)
+            new PostReplyCommand($discussion->id, array_get($command->data, 'content'), $command->user)
         );
 
-        // The discussion may have been updated by the PostReplyCommand; we need
-        // to refresh its data.
-        $discussion = $post->discussion;
-
-        return $discussion;
+        return $post->discussion;
     }
 }