Laravel: Load posts with privacy only to subscriber

$result = mysql_query("
    SELECT t.tid, t.title, t.time, t.authorid, t.photo, f.fuid, f.myuid, u.username as writer 
      FROM topics as t, friends as f, users as u 
     WHERE cid='$cid' 
       AND u.id=t.authorid 
       AND (
               f.fuid=t.authorid AND f.myuid='$myid' 
               OR
               f.myuid=t.authorid AND f.fuid='$myid'
               OR
               t.autorid='$myid'
           ) 
  ORDER BY tid DESC 
     LIMIT $start, $perpage
");

$profileLikedPosts = Post::whereHas('likes', function($query) use ($user) {
        return $query->where('user_id', $user->id);
    })
    ->get();

// The "whereIn" just limits the results to those posts already retrieved
// for the profile user. Not required, but gives a little performance boost
// if this collection doesn't need the non-profile-liked posts.

$authUser = Auth::user();
$authLikedPosts = Post::whereHas('likes', function($query) use ($authUser) {
        return $query->where('user_id', $authUser->id);
    })
    ->whereIn('id', $profileLikedPosts->lists('id'))
    ->get();

@foreach ($profileLikedPosts as $post)
    // ...
    @if ($authLikedPosts->contains('id', $post->id))
        // this post is liked by both; show your icon
    @endif
    // ...
@endforeach

https://graph.facebook.com/{post-id}?fields=privacy{value}&access_token={user-token}