Activities_model::logActivity PHP Method

    public function logActivity($user_id, $action, $context, $message)
    {
        if (method_exists($this->router, 'fetch_module')) {
            $this->_module = $this->router->fetch_module();
        }
        if (is_numeric($user_id) and is_string($action) and is_string($message)) {
            // set the current domain (e.g admin, main, module)
            $domain = !empty($this->_module) ? 'module' : APPDIR;
            // set user if customer is logged in and the domain is not admin
            $user = 'staff';
            if ($domain !== ADMINDIR) {
                $this->load->library('customer');
                if ($this->customer->islogged()) {
                    $user = 'customer';
                }
            }
            $this->db->set('user', $user);
            $this->db->set('domain', $domain);
            $this->db->set('context', $context);
            if (is_numeric($user_id)) {
                $this->db->set('user_id', $user_id);
            }
            if (is_string($action)) {
                $this->db->set('action', $action);
            }
            if (is_string($message)) {
                $this->db->set('message', $message);
            }
            $this->db->set('date_added', mdate('%Y-%m-%d %H:%i:%s', time()));
            $this->db->insert('activities');
        }
    }