Add user activity system

src/Api/Actions/Activity/IndexAction.php

@@ -0,0 +1,47 @@
+<?php namespace Flarum\Api\Actions\Activity;
+
+use Flarum\Core\Repositories\UserRepositoryInterface;
+use Flarum\Core\Repositories\ActivityRepositoryInterface;
+use Flarum\Core\Support\Actor;
+use Flarum\Api\Actions\BaseAction;
+use Flarum\Api\Actions\ApiParams;
+use Flarum\Api\Serializers\ActivitySerializer;
+
+class IndexAction extends BaseAction
+{
+    /**
+     * Instantiate the action.
+     *
+     * @param  \Flarum\Core\Search\Discussions\UserSearcher  $searcher
+     */
+    public function __construct(Actor $actor, UserRepositoryInterface $users, ActivityRepositoryInterface $activity)
+    {
+        $this->actor = $actor;
+        $this->users = $users;
+        $this->activity = $activity;
+    }
+
+    /**
+     * Show a user's activity feed.
+     *
+     * @return \Illuminate\Http\Response
+     */
+    protected function run(ApiParams $params)
+    {
+        $start = $params->start();
+        $count = $params->count(20, 50);
+        $type  = $params->get('type');
+        $id    = $params->get('users');
+
+        $user = $this->users->findOrFail($id, $this->actor->getUser());
+
+        $activity = $this->activity->findByUser($user->id, $this->actor->getUser(), $count, $start, $type);
+
+        // Finally, we can set up the activity serializer and use it to create
+        // a collection of activity results.
+        $serializer = new ActivitySerializer(['sender', 'post', 'post.discussion', 'post.user', 'post.discussion.startUser', 'post.discussion.lastUser'], ['user']);
+        $document = $this->document()->setPrimaryElement($serializer->collection($activity));
+
+        return $this->respondWithDocument($document);
+    }
+}

src/Api/Actions/Discussions/ShowAction.php

@@ -5,12 +5,12 @@ use Flarum\Core\Repositories\DiscussionRepositoryInterface as DiscussionReposito
 use Flarum\Core\Repositories\PostRepositoryInterface as PostRepository;
 use Flarum\Api\Actions\BaseAction;
 use Flarum\Api\Actions\ApiParams;
-use Flarum\Api\Actions\Posts\GetsPostsForDiscussion;
+use Flarum\Api\Actions\Posts\GetsPosts;
 use Flarum\Api\Serializers\DiscussionSerializer;
 
 class ShowAction extends BaseAction
 {
-    use GetsPostsForDiscussion;
+    use GetsPosts;
 
     /**
      * The discussion repository.
@@ -51,7 +51,7 @@ class ShowAction extends BaseAction
 
         if (in_array('posts', $include)) {
             $relations = ['user', 'user.groups', 'editUser', 'hideUser'];
-            $discussion->posts = $this->getPostsForDiscussion($params, $discussion->id)->load($relations);
+            $discussion->posts = $this->getPosts($params, ['discussion_id' => $discussion->id])->load($relations);
 
             $include = array_merge($include, array_map(function ($relation) {
                 return 'posts.'.$relation;

src/Api/Actions/Posts/GetsPosts.php

@@ -3,23 +3,23 @@
 use Flarum\Core\Models\User;
 use Flarum\Api\Actions\ApiParams;
 
-trait GetsPostsForDiscussion
+trait GetsPosts
 {
-	protected function getPostsForDiscussion(ApiParams $params, $discussionId)
+	protected function getPosts(ApiParams $params, $where)
 	{
 		$sort = $params->sort(['time']);
         $count = $params->count(20, 50);
         $user = $this->actor->getUser();
 
-        if (($near = $params->get('near')) > 1) {
-            $start = $this->posts->getIndexForNumber($discussionId, $near, $user);
+        if (isset($where['discussion_id']) && ($near = $params->get('near')) > 1) {
+            $start = $this->posts->getIndexForNumber($where['discussion_id'], $near, $user);
             $start = max(0, $start - $count / 2);
         } else {
             $start = 0;
         }
 
-        return $this->posts->findByDiscussion(
-            $discussionId,
+        return $this->posts->findWhere(
+            $where,
             $user,
             $sort['field'],
             $sort['order'] ?: 'asc',

src/Api/Actions/Posts/IndexAction.php

@@ -9,7 +9,7 @@ use Flarum\Api\Serializers\PostSerializer;
 
 class IndexAction extends BaseAction
 {
-    use GetsPostsForDiscussion;
+    use GetsPosts;
 
     /**
      * The post repository.
@@ -37,14 +37,19 @@ class IndexAction extends BaseAction
     protected function run(ApiParams $params)
     {
         $postIds = (array) $params->get('ids');
-        $include = ['user', 'user.groups', 'editUser', 'hideUser'];
+        $include = ['user', 'user.groups', 'editUser', 'hideUser', 'discussion'];
         $user = $this->actor->getUser();
 
         if (count($postIds)) {
             $posts = $this->posts->findByIds($postIds, $user);
         } else {
-            $discussionId = $params->get('discussions');
-            $posts = $this->getPostsForDiscussion($params, $discussionId, $user);
+            if ($discussionId = $params->get('discussions')) {
+                $where['discussion_id'] = $discussionId;
+            }
+            if ($userId = $params->get('users')) {
+                $where['user_id'] = $userId;
+            }
+            $posts = $this->getPosts($params, $where, $user);
         }
 
         if (! count($posts)) {