majestic/session/Session.model.php

<?php
/**
 * @copyright NetMonsters <team@netmonsters.ru>
 * @link http://netmonsters.ru
 * @package Majestic
 * @subpackage Session
 * @since 2010-02-28
 * @version SVN: $Id$
 * @filesource $URL$
 */

class SessionModel extends Model
{
    
    protected $life_time;
    
    public function __construct()
    {
        parent::__construct();
        $this->life_time = get_cfg_var('session.gc_maxlifetime');
    }
    
    /* Session handler methods */
    
    public function open($save_path, $sess_name)
    {
        return true;
    }

    public function close()
    {
        return true;
    }

    public function read($id)
    {
        $sql = 'SELECT `data` FROM ' . $this->table() . ' WHERE `id`=? AND `expires` > UNIX_TIMESTAMP()';
        return (string) $this->fetchField($sql, $id, 'data');
    }

    public function write($id, $data)
    {
        preg_match('/user\|.+s:2:"id";s:(\d+):"(\d+)"/', $data, $match);
        $user_id = empty($match) ? 0 : (int) $match[2];
        
        $sql = 'INSERT INTO ' . $this->table() . ' (`id`, `expires`, `user_id`, `data`)'
             . ' VALUES(' . $this->quote($id) . ', UNIX_TIMESTAMP() + ' . (int) $this->life_time . ', ' . $user_id . ', ' . $this->quote($data) . ')'
             . ' ON DUPLICATE KEY UPDATE `expires`=UNIX_TIMESTAMP() + ' . (int) $this->life_time . ', `user_id`=' . $user_id . ', `data`=' . $this->quote($data);
        $affected = $this->db->query($sql)->affectedRows();
        return (bool) ($this->getInsertId()) ? $this->getInsertId() : $affected;
    }

    public function destroy($id)
    {
        return (bool) $this->db->delete($this->table(false), array('`id`=?' => (string) $id));
    }

    public function gc($max_life_time)
    {
        return (bool) $this->db->delete($this->table(false), '`expires` < UNIX_TIMESTAMP()');
    }
    
    /* End of Session handler methods */
    
    
    public function destroyByUserId($user_id)
    {
        return $this->db->delete($this->table(false), array('`user_id`=?' => $user_id));
    }
}