SproutCMS

source of /sprout/Helpers/Drivers/Cache/Xcache.php

Copyright (C) 2017 Karmabunny Pty Ltd.

This file is a part of SproutCMS.

SproutCMS is free software: you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software Foundation, either
version 2 of the License, or (at your option) any later version.

For more information, visit <http://getsproutcms.com>.

This class was originally from Kohana 2.3.4
Copyright 2007-2008 Kohana Team

<?php
/**
 * Copyright (C) 2017 Karmabunny Pty Ltd.
 *
 * This file is a part of SproutCMS.
 *
 * SproutCMS is free software: you can redistribute it and/or modify it under the terms
 * of the GNU General Public License as published by the Free Software Foundation, either
 * version 2 of the License, or (at your option) any later version.
 *
 * For more information, visit <http://getsproutcms.com>.
 *
 * This class was originally from Kohana 2.3.4
 * Copyright 2007-2008 Kohana Team
 */
namespace Sprout\Helpers\Drivers\Cache;
 
use Kohana;
use Kohana_Exception;
 
use Sprout\Helpers\Drivers\CacheDriver;
 
 
/**
 * Xcache Cache driver.
 */
class Xcache implements CacheDriver
{
 
    public function __construct()
    {
        if ( ! extension_loaded('xcache'))
            throw new Kohana_Exception('cache.extension_not_loaded', 'xcache');
    }
 
    public function get($id)
    {
        if (xcache_isset($id))
            return xcache_get($id);
 
        return NULL;
    }
 
    public function set($id, $data, array $tags = NULL, $lifetime)
    {
        if ( ! empty($tags))
        {
            Kohana::log('error', 'Cache: tags are unsupported by the Xcache driver');
        }
 
        return xcache_set($id, $data, $lifetime);
    }
 
    public function find($tag)
    {
        Kohana::log('error', 'Cache: tags are unsupported by the Xcache driver');
        return FALSE;
    }
 
    public function delete($id, $tag = FALSE)
    {
        if ($tag !== FALSE)
        {
            Kohana::log('error', 'Cache: tags are unsupported by the Xcache driver');
            return TRUE;
        }
        elseif ($id !== TRUE)
        {
            if (xcache_isset($id))
                return xcache_unset($id);
 
            return FALSE;
        }
        else
        {
            // Do the login
            $this->auth();
            $result = TRUE;
            for ($i = 0, $max = xcache_count(XC_TYPE_VAR); $i < $max; $i++)
            {
                if (xcache_clear_cache(XC_TYPE_VAR, $i) !== NULL)
                {
                    $result = FALSE;
                    break;
                }
            }
 
            // Undo the login
            $this->auth(TRUE);
            return $result;
        }
 
        return TRUE;
    }
 
    public function deleteExpired()
    {
        return TRUE;
    }
 
    private function auth($reverse = FALSE)
    {
        static $backup = array();
 
        $keys = array('PHP_AUTH_USER', 'PHP_AUTH_PW');
 
        foreach ($keys as $key)
        {
            if ($reverse)
            {
                if (isset($backup[$key]))
                {
                    $_SERVER[$key] = $backup[$key];
                    unset($backup[$key]);
                }
                else
                {
                    unset($_SERVER[$key]);
                }
            }
            else
            {
                $value = getenv($key);
 
                if ( ! empty($value))
                {
                    $backup[$key] = $value;
                }
 
                $_SERVER[$key] = Kohana::config('cache_xcache.'.$key);
            }
        }
    }
 
} // End Cache Xcache Driver