<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class School_lib
{
    /**
     *
     * @var object
     */
    private $CI;

    public function __construct()
    {
        $this->CI =& get_instance();

        $this->CI->load->library('session');
        $this->CI->load->helper('cookie');
        $this->CI->load->model('ibn_auth_mod');
    }

    /**
     * create a new user
     *
     * @param string $name
     * @param string $email
     * @param string $password
     */
    public function create_user($name, $email, $password)
    {
        $this->CI->ibn_auth_mod->create_user($name, $email, $password);
    }

    /**
     * check if email is avaiable
     *
     * @param string $email
     */
    public function check_email($email)
    {
        $this->CI->ibn_auth_mod->check_email($email);
    }

    /**
     * login the user
     *
     * @param string $email
     * @param string $password
     */
    public function login($email, $password)
    {
        $user = $this->CI->ibn_auth_mod->login($email, $password);

        if ($user)
        {
            $session = array(
                            'logged' => TRUE,
                            'id' => $user->id,
                            'name' => $user->name,
                            'email' => $user->email,
                            'last_login' => $user->last_login
                        );

            $this->create_session($session);
        }
    }

    /**
     * reset user password and email the new one
     *
     * @param string $email
     */
    public function reset_password($email)
    {
        if ($this->check_email($email))
        {
            $random_password = $this->random_string();

            $this->CI->ibn_auth_mod->reset_password($random_password);
        }
    }

    /**
     * generate a random string
     *
     * @param integer $length
     *
     * @return string
     */
    public function random_string($length = 8)
    {
        $characters = '0123456789abcdefghijklmnopqrstuvwxyz';
        $string = '';

        for ($i = 0; $i < $length; $i++)
        {
            $string .= $characters[mt_rand(0, strlen($characters))];
        }

        return $string;
    }

    /**
     * create cookie from database for "remember me"
     *
     * @param integer $user_id
     */
    public function create_cookie($user_id)
    {
        $cookie = sha1(uniqid(rand(), TRUE));

        $this->CI->ibn_auth_mod->create_cookie($user_id, $cookie);
    }

    /**
     * check cookie from database for "remember me"
     *
     * @param string $cookie
     */
    public function check_cookie($cookie)
    {
        $user = $this->CI->ibn_auth_mod->check_cookie($cookie);

        if ($user) $this->autologin($user->id);
    }

    /**
     * create user session
     *
     * @param array $session
     */
    public function create_session($session)
    {
        $this->session->set_userdata($session);
    }

    /**
     * logout the user
     */
    public function logout()
    {
        $this->session->sess_destroy();

        if (get_cookie('remember_me'))
        {
            $this->delete_cookie($this->session->userdata('id'));
        }
    }

    /**
     * delete cookie from database and remember_me cookie
     *
     * @param integer $user_id
     */
    public function delete_cookie($user_id)
    {
        delete_cookie("remember_me");

        $this->CI->ibn_auth_mod->delete_cookie($user_id);
    }

    /**
     * auto login the user for "remember me"
     *
     * @param integer $id
     */
    public function auto_login($id)
    {
        $user = $this->CI->ibn_auth_mod->auto_login($id);

        if ($user)
        {
            $session = array(
                    'logged' => TRUE,
                    'id' => $user->id,
                    'name' => $user->name,
                    'email' => $user->email,
                    'last_login' => $user->last_login
            );

            $this->create_session($session);
        }
    }
}