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

class Auth_lib
{

	function Auth_lib()
	{
		$this->ci =& get_instance();
	}

	function login($username, $password)
	{
		$password = md5($password);

		$this->ci->db->select('user_id');
		$this->ci->db->where('user_username', $username);
		$this->ci->db->where('user_password', $password);
		$this->ci->db->limit(1);

		//Execute Active Record Query that was just built
		$query = $this->ci->db->get('users');

		// If there is a user found with those credentials then store some vital data into the Session
		if ($query->num_rows() > 0) {
			$row = $query->row();
			$data = array(
				'username'	=> $username,
				'user_id'	=> $row->user_id,
				'logged_in'	=> TRUE//,
			);

			$this->ci->session->set_userdata($data);

			return TRUE;
		} else {
			// If the user is not logged in, FALSE must be returned
			// An attempt log could be executed here
			return FALSE;
		}
	}

	function logout()
	{
		$this->ci->session->set_userdata(array('user_id' => '', 'username' => '', 'status' => '','logged_in' => ''));

		$this->ci->session->sess_destroy();
		return TRUE;
	}

	function is_logged_in()
	{
		return $this->ci->session->userdata('user_id');
	}

}