Add user activity system

src/Core/Repositories/ActivityRepositoryInterface.php

@@ -0,0 +1,8 @@
+<?php namespace Flarum\Core\Repositories;
+
+use Flarum\Core\Models\User;
+
+interface ActivityRepositoryInterface
+{
+    public function findByUser($userId, User $user, $count = null, $start = 0, $type = null);
+}

src/Core/Repositories/EloquentActivityRepository.php

@@ -0,0 +1,39 @@
+<?php namespace Flarum\Core\Repositories;
+
+use Flarum\Core\Models\Activity;
+use Flarum\Core\Models\Post;
+use Flarum\Core\Models\User;
+
+class EloquentActivityRepository implements ActivityRepositoryInterface
+{
+    public function findByUser($userId, User $viewer, $count = null, $start = 0, $type = null)
+    {
+        // This is all very rough and needs to be cleaned up
+
+        $null = \DB::raw('NULL');
+        $query = Activity::with('sender')->select('id', 'user_id', 'sender_id', 'type', 'data', 'time', \DB::raw('NULL as post_id'))->where('user_id', $userId);
+
+        if ($type) {
+            $query->where('type', $type);
+        }
+
+        $posts = Post::whereCan($viewer, 'view')->with('post', 'post.discussion', 'post.user', 'post.discussion.startUser', 'post.discussion.lastUser')->select(\DB::raw("CONCAT('post', id)"), 'user_id', $null, \DB::raw("'post'"), $null, 'time', 'id')->where('user_id', $userId);
+
+        if ($type === 'post') {
+            $posts->where('number', '>', 1);
+        } elseif ($type === 'discussion') {
+            $posts->where('number', 1);
+        }
+
+        if (!$type) {
+            $join = User::select(\DB::raw("CONCAT('join', id)"), 'id', 'id', \DB::raw("'join'"), $null, 'join_time', $null)->where('id', $userId);
+            $query->union($join->getQuery());
+        }
+
+        return $query->union($posts->getQuery())
+            ->orderBy('time', 'desc')
+            ->skip($start)
+            ->take($count)
+            ->get();
+    }
+}

src/Core/Repositories/EloquentPostRepository.php

@@ -24,10 +24,10 @@ class EloquentPostRepository implements PostRepositoryInterface
     }
 
     /**
-     * Find posts in a discussion, optionally making sure they are visible to
-     * a certain user, and/or using other criteria.
+     * Find posts that match certain conditions, optionally making sure they
+     * are visible to a certain user, and/or using other criteria.
      *
-     * @param  integer  $discussionId
+     * @param  array  $where
      * @param  \Flarum\Core\Models\User|null  $user
      * @param  string  $sort
      * @param  string  $order
@@ -35,9 +35,9 @@ class EloquentPostRepository implements PostRepositoryInterface
      * @param  integer  $start
      * @return \Illuminate\Database\Eloquent\Collection
      */
-    public function findByDiscussion($discussionId, User $user = null, $sort = 'time', $order = 'asc', $count = null, $start = 0)
+    public function findWhere($where = [], User $user = null, $sort = 'time', $order = 'asc', $count = null, $start = 0)
     {
-        $query = Post::where('discussion_id', $discussionId)
+        $query = Post::where($where)
             ->orderBy($sort, $order)
             ->skip($start)
             ->take($count);

src/Core/Repositories/PostRepositoryInterface.php

@@ -17,10 +17,10 @@ interface PostRepositoryInterface
     public function findOrFail($id, User $user = null);
 
     /**
-     * Find posts in a discussion, optionally making sure they are visible to
-     * a certain user, and/or using other criteria.
+     * Find posts that match certain conditions, optionally making sure they
+     * are visible to a certain user, and/or using other criteria.
      *
-     * @param  integer  $discussionId
+     * @param  array  $where
      * @param  \Flarum\Core\Models\User|null  $user
      * @param  string  $sort
      * @param  string  $order
@@ -28,7 +28,7 @@ interface PostRepositoryInterface
      * @param  integer  $start
      * @return \Illuminate\Database\Eloquent\Collection
      */
-    public function findByDiscussion($discussionId, User $user = null, $sort = 'time', $order = 'asc', $count = null, $start = 0);
+    public function findWhere($where = [], User $user = null, $sort = 'time', $order = 'asc', $count = null, $start = 0);
 
     /**
      * Find posts by their IDs, optionally making sure they are visible to a