Add a serializer and API action to get information about the forum

src/Api/Actions/Forum/ShowAction.php

@@ -0,0 +1,29 @@
+<?php namespace Flarum\Api\Actions\Forum;
+
+use Flarum\Core\Models\Forum;
+use Flarum\Api\Actions\SerializeResourceAction;
+use Flarum\Api\JsonApiRequest;
+use Flarum\Api\JsonApiResponse;
+
+class ShowAction extends SerializeResourceAction
+{
+    /**
+     * The name of the serializer class to output results with.
+     *
+     * @var string
+     */
+    public static $serializer = 'Flarum\Api\Serializers\ForumSerializer';
+
+    /**
+     * Get the forum, ready to be serialized and assigned to the JsonApi
+     * response.
+     *
+     * @param \Flarum\Api\JsonApiRequest $request
+     * @param \Flarum\Api\JsonApiResponse $response
+     * @return \Flarum\Core\Models\Forum
+     */
+    protected function data(JsonApiRequest $request, JsonApiResponse $response)
+    {
+        return app('flarum.forum');
+    }
+}

src/Api/Serializers/BaseSerializer.php

@@ -4,6 +4,7 @@ use Tobscure\JsonApi\SerializerAbstract;
 use Flarum\Api\Events\SerializeAttributes;
 use Flarum\Api\Events\SerializeRelationship;
 use Flarum\Support\Actor;
+use Illuminate\Database\Eloquent\Relations\Relation;
 use Closure;
 
 /**
@@ -54,7 +55,16 @@ abstract class BaseSerializer extends SerializerAbstract
                 $data = $relation($model, $include);
             } else {
                 if ($include) {
-                    $data = !is_null($model->$relation) ? $model->$relation : $model->$relation()->getResults();
+                    if (! is_null($model->$relation)) {
+                        $data = $model->$relation;
+                    } else {
+                        $relation = $model->$relation();
+                        if ($relation instanceof Relation) {
+                            $data = $relation->getResults();
+                        } else {
+                            $data = $relation->get();
+                        }
+                    }
                 } elseif ($many) {
                     $relationIds = $relation.'_ids';
                     $data = $model->$relationIds ?: $model->$relation()->get(['id'])->fetch('id')->all();

src/Api/Serializers/ForumSerializer.php

@@ -0,0 +1,31 @@
+<?php namespace Flarum\Api\Serializers;
+
+class ForumSerializer extends BaseSerializer
+{
+    /**
+     * The resource type.
+     *
+     * @var string
+     */
+    protected $type = 'forums';
+
+    protected function id($forum)
+    {
+        return 1;
+    }
+
+    /**
+     * Serialize attributes of a Forum model for JSON output.
+     *
+     * @param  Forum $forum The Forum model to serialize.
+     * @return array
+     */
+    protected function attributes($forum)
+    {
+        $attributes = [
+            'title' => $forum->title
+        ];
+
+        return $this->extendAttributes($forum, $attributes);
+    }
+}

src/Core/Models/Discussion.php

@@ -28,6 +28,8 @@ class Discussion extends Model
         'last_post_number' => 'integer'
     ];
 
+    protected static $relationships = [];
+
     /**
      * The table associated with the model.
      *

src/Core/Models/Forum.php

@@ -7,6 +7,8 @@ class Forum extends Model
 {
     use Permissible;
 
+    protected static $relationships = [];
+
     public function getTitleAttribute()
     {
         return Core::config('forum_title');

src/Forum/Actions/IndexAction.php

@@ -22,10 +22,18 @@ class IndexAction extends BaseAction
     public function handle(Request $request, $params = [])
     {
         $config = DB::table('config')->whereIn('key', ['base_url', 'api_url', 'forum_title', 'welcome_title', 'welcome_message'])->lists('value', 'key');
-        $data = [];
         $session = [];
         $alert = Session::get('alert');
 
+        $response = app('Flarum\Api\Actions\Forum\ShowAction')
+            ->handle(new ApiRequest([], $this->actor))
+            ->content->toArray();
+
+        $data = [$response['data']];
+        if (isset($response['included'])) {
+            $data = array_merge($data, $response['included']);
+        }
+
         if (($user = $this->actor->getUser()) && $user->exists) {
             $session = [
                 'userId' => $user->id,
@@ -36,7 +44,7 @@ class IndexAction extends BaseAction
                 ->handle(new ApiRequest(['id' => $user->id], $this->actor))
                 ->content->toArray();
 
-            $data = [$response['data']];
+            $data = array_merge($data, [$response['data']]);
             if (isset($response['included'])) {
                 $data = array_merge($data, $response['included']);
             }