Customer Autologin

<?php

class Customer {

    public function __construct() {
        $this->CI = &get_instance();
        $this->CI->load->library('encryption');
        $this->CI->load->library('encrypt');
        $this->CI->load->library('session');
        $this->CI->load->helper('string');
        $this->CI->load->model('customer_model');

        if (!$this->is_logged_in('is_logged_in')) {
            $this->authenticateAutologin();
        }
    }

    public function postLogin() {
        $customer_query = $this->CI->customer_model->get_customer();

        if ($customer_query) {

            $login_session_data = array(
                'customer_id' => $customer_query['customer_id'],
                'is_logged_in' => true
            );

            $this->CI->session->set_userdata($login_session_data);

            if ($this->CI->input->post('remember', true)) {
                // Create A Autologin.
            }

            return true;
        }
    }

    public function is_logged_in() {
        return $this->CI->session->userdata('is_logged_in');
    }

    public function authenticateAutologin() {

        // @todo proper auth encrypt

        $autologinData = $this->readAutologin();

        if ($autologinData) {

            $autologinSessionData = array(
                'customer_id' => $autologinData['customer_id'],
                'is_logged_in' => true,
                'autologin' => 'enabled'
            );

            $this->CI->session->set_userdata($autologinSessionData);

            return true;

        }

        return false;
    }

    public function readAutologin() {
        $this->CI->db->where('customer_id', '1');
        $query = $this->CI->db->get($this->CI->db->dbprefix . 'customer_autologin');
        if ($query->num_rows() == 1) {
            return $query->row_array();
        } else {
            return false;
        }
    }

    public function logout()
    {
        $this->CI->session->unset_userdata('is_logged_in');
        $this->CI->session->unset_userdata('customer_id');
        $this->CI->session->unset_userdata('autologin');
        setcookie('remember', '', $this->CI->config->item('end_cookie_time'), '/');
    }
}