public function delete($id)
{
$this->db->trans_start();
# remove bookmark related employee
$this->load->model("BookmarkModel");
$bookmark = new BookmarkModel();
$bookmark->delete_by_employee($id);
# remove follower related employee
$this->load->model("FollowerModel");
$follower = new FollowerModel();
$follower->delete_by_employee($id);
# remove activity related employee
$this->load->model("EmployeeActivityModel");
$activity = new EmployeeActivityModel();
$activity->delete_by_employee($id);
# remove cv list of experience related employee
$this->load->model("ExperienceModel");
$experience = new ExperienceModel();
$experience->delete_by_employee($id);
# remove cv list of education related employee
$this->load->model("PortfolioModel");
$education = new PortfolioModel();
$education->delete_by_employee($id);
# remove thread list related employee
$this->load->model("ThreadModel");
$thread = new ThreadModel();
$thread->delete_by_employee($id);
# remove application ever sent
$this->load->model("ApplicationModel");
$application = new ApplicationModel();
$application->delete_by_employee($id);
# remove employee itself
$condition = array(EmployeeModel::$primary_key => $id);
$this->db->delete(EmployeeModel::$table_name, $condition);
$this->db->trans_complete();
return $this->db->trans_status();
}