App\Http\Controllers\Forum\TopicsController::pin PHP Method

    public function pin($id)
    {
        $topic = Topic::findOrFail($id);
        priv_check('ForumTopicModerate', $topic)->ensureCan();
        $state = get_bool(Request::input('pin'));
        $topic->pin($state);
        $type = 'moderate_pin';
        return js_view('forum.topics.replace_button', compact('topic', 'type', 'state'));
    }