public function get_focus_users_by_topic($topic_id, $limit = 10)
	{
		if ($uids = $this->query_all("SELECT DISTINCT uid FROM " . $this->get_table('topic_focus') . " WHERE topic_id = " . intval($topic_id), $limit))
		{
			return $this->model('account')->get_user_info_by_uids(fetch_array_value($uids, 'uid'));
		}
	}

  public function get_focus_users_by_topic($topic_id, $limit = 10)
	{
		$user_list = array();

		$uids = $this->query_all("SELECT DISTINCT uid FROM " . $this->get_table('topic_focus') . " WHERE topic_id = " . intval($topic_id), $limit);

		if ($uids)
		{
			$user_list_query = $this->model('account')->get_user_info_by_uids(fetch_array_value($uids, 'uid'));

			if ($user_list_query)
			{
				foreach ($user_list_query AS $user_info)
				{
					$user_list[$user_info['uid']]['uid'] = $user_info['uid'];

					$user_list[$user_info['uid']]['user_name'] = $user_info['user_name'];

					$user_list[$user_info['uid']]['avatar_file'] = get_avatar_url($user_info['uid'], 'mid');

					$user_list[$user_info['uid']]['url'] = get_js_url('/people/' . $user_info['url_token']);
				}
			}
		}

		return $user_list;
	}