<?php
class Dubauth
{
    private $error = array();

    function __construct()
    {
        $this->ci =& get_instance();
        $this->ci->load->library('session');
        $this->ci->load->model('user');
        $this->ci->load->helper('string');
    }

    function login($username, $password)
    {
        if(!($user = $this->ci->user->login_username($username)))
        {
            $this->error = 'invalid_user_pass';
            return false;
        }
        elseif($user->password != $password)
        {
            $this->error = 'invalid_user_pass';
            return false;
        }
        elseif($user->active == 0)
        {
            $this->error = 'account_not_verified';
            return false;
        }
        elseif($user->banned == 1)
        {
            $this->error = 'account_banned';
            return false;
        }
        else
        {
            $this->ci->session->set_userdata(array(
                'user_id'   => $user->user_id,
                'username'  => $user->username
            ));
            return true;
        }
    }

    function verify($key)
    {
        if(!($user_id = $this->ci->user->is_key_valid($key)))
        {
            $this->error = 'invalid_key';
            return false;
        }
        else
        {
            $this->ci->user->validate($user_id, $key);
            return true;
        }
    }

    function register($username, $email, $password)
    {
        if($this->ci->user->is_username_registered($username))
        {
            $this->error = 'username_registered';
            return false;
        }
        elseif($this->ci->user->is_email_registered($email))
        {
            $this->error = 'email_registered';
            return false;
        }
        else
        {
            $array = array(
                'username'  => $this->ci->input->post('username'),
                'email'     => $this->ci->input->post('email'),
                'password'  => md5($this->ci->input->post('password'))
            );

            $this->ci->db->insert('users', $array);

            $array = array(
                'user_id' => $this->ci->db->insert_id(),
                'key'     => random_string('unique')
            );

            $this->ci->db->insert('user_verify_keys', $array);

            return true;
        }
    }

    function logout()
    {
        $this->ci->session->sess_destroy();
    }

    function is_logged_in()
    {
        $user_id = $this->ci->session->userdata('user_id');
        if(!isset($user_id))
        {
            return false;
        }
        else
        {
            $this->ci->db->select('user_id');
            $this->ci->db->where('user_id', $this->ci->session->userdata('user_id'));
            $query = $this->ci->db->get('users');
            if($query->num_rows() == 0)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
    }

    function get_error_message()
    {
        return $this->error;
    }
}
?>