revert: recover start method used by ecosystem

framework/core/src/Api/Resource/DiscussionResource.php

@@ -242,16 +242,7 @@ class DiscussionResource extends AbstractDatabaseResource
     /** @param Discussion $model */
     public function creating(object $model, \Tobyz\JsonApiServer\Context $context): ?object
     {
-        $actor = $context->getActor();
+        return Discussion::start(null, $context->getActor());
-
-        $model->created_at = Carbon::now();
-        $model->user_id = $actor->id;
-
-        $model->setRelation('user', $actor);
-
-        $model->raise(new Started($model));
-
-        return $model;
     }
 
     /** @param Discussion $model */

framework/core/src/Discussion/Discussion.php

@@ -114,6 +114,24 @@ class Discussion extends AbstractModel
         });
     }
 
+    /**
+     * Start a new discussion. Raises the DiscussionWasStarted event.
+     */
+    public static function start(?string $title, User $user): static
+    {
+        $discussion = new static;
+
+        $discussion->title = $title;
+        $discussion->created_at = Carbon::now();
+        $discussion->user_id = $user->id;
+
+        $discussion->setRelation('user', $user);
+
+        $discussion->raise(new Event\Started($discussion));
+
+        return $discussion;
+    }
+
     public function rename(string $title): static
     {
         if ($this->title !== $title) {