feat(feed): ( issue #324 ) Add a get a single topic API

app/API2/Controllers/Feed/Topic.php

@@ -27,12 +27,13 @@
 use Zhiyi\Plus\Types\Models as ModelsTypes;
 use Zhiyi\Plus\Models\FileWith as FileWithModel;
 use Zhiyi\Plus\Models\FeedTopic as FeedTopicModel;
-use Zhiyi\Plus\API2\Resources\Feed\TopicCollection;
+use Zhiyi\Plus\API2\Resources\Feed\Topic as TopicResource;
 use Illuminate\Database\Eloquent\Builder as EloquentBuilder;
 use Zhiyi\Plus\API2\Requests\Feed\TopicIndex as IndexRequest;
 use Zhiyi\Plus\API2\Requests\Feed\EditTopic as EditTopicRequest;
 use Zhiyi\Plus\API2\Requests\Feed\CreateTopic as CreateTopicRequest;
 use Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException;
+use Zhiyi\Plus\API2\Resources\Feed\TopicCollection as TopicCollectionResource;
 
 class Topic extends Controller
 {
@@ -98,7 +99,7 @@ public function index(IndexRequest $request, FeedTopicModel $model): JsonRespons
             ->get();
 
         // Create the action response.
-        $response = (new TopicCollection($result))
+        $response = (new TopicCollectionResource($result))
             ->response()
             ->setStatusCode(Response::HTTP_OK /* 200 */);
 
@@ -228,4 +229,17 @@ public function update(EditTopicRequest $request, ModelsTypes $types, FeedTopicM
             return $response;
         });
     }
+
+    /**
+     * Get a single topic.
+     *
+     * @param \Zhiyi\Plus\Models\FeedTopic $topic
+     * @return \Illuminate\Http\JsonResponse
+     */
+    public function show(FeedTopicModel $topic): JsonResponse
+    {
+        return (new TopicResource($topic))
+            ->response()
+            ->setStatusCode(Response::HTTP_OK /* 200 */);
+    }
 }

app/API2/Resources/Feed/Topic.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * +----------------------------------------------------------------------+
+ * |                          ThinkSNS Plus                               |
+ * +----------------------------------------------------------------------+
+ * | Copyright (c) 2018 Chengdu ZhiYiChuangXiang Technology Co., Ltd.     |
+ * +----------------------------------------------------------------------+
+ * | This source file is subject to version 2.0 of the Apache license,    |
+ * | that is bundled with this package in the file LICENSE, and is        |
+ * | available through the world-wide-web at the following url:           |
+ * | http://www.apache.org/licenses/LICENSE-2.0.html                      |
+ * +----------------------------------------------------------------------+
+ * | Author: Slim Kit Group <master@zhiyicx.com>                          |
+ * | Homepage: www.thinksns.com                                           |
+ * +----------------------------------------------------------------------+
+ */
+
+namespace Zhiyi\Plus\API2\Resources\Feed;
+
+use Illuminate\Http\Resources\Json\JsonResource;
+
+class Topic extends JsonResource
+{
+    /**
+     * The topic resource to array.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @return array
+     */
+    public function toArray($request): array
+    {
+        $user = $request->user('api');
+
+        return [
+            'id' => $this->id,
+            'name' => $this->name,
+            'logo' => $this->when($this->logo, $this->logo),
+            'desc' => $this->when($this->desc, $this->desc),
+            'creator_user_id' => $this->creator_user_id,
+            'feeds_count' => $this->feeds_count,
+            'followers_count' => $this->followers_count,
+            'has_followed' => $this->when($user, function () use ($user) {
+                return $this->followers()->where('user_id', $user->id)->exists();
+            }),
+        ];
+    }
+}

routes/api.php

@@ -668,6 +668,14 @@
              * @Response::header('Status', 204, 'No Content')
              */
             $api->patch('{topic}', \Zhiyi\Plus\API2\Controllers\Feed\Topic::class.'@update');
+
+            /*
+             * Get a single topic.
+             *
+             * @Get /api/v2/feed/topics/:topicID
+             * @Response::header('Status', 200, 'OK')
+             */
+            $api->get('{topic}', \Zhiyi\Plus\API2\Controllers\Feed\Topic::class.'@show');
         });
     });