<?php if (!defined('DEDEINC')) exit("Request Error!");
/**
 * 缓存小助手,支持文件和memcache
 *
 * @version        $Id: cache.helper.php 1 10:46 2011-3-2 tianya $
 * @package        DedeBIZ.Helpers
 * @copyright      Copyright (c) 2021, DedeBIZ.COM
 * @license        https://www.dedebiz.com/license
 * @link           https://www.dedebiz.com
 */
/**
 *  读缓存
 *
 * @access    public
 * @param     string  $prefix  前缀
 * @param     string  $key  键
 * @param     string  $is_memcache  是否为memcache缓存
 * @return    string
 */
if (!function_exists('GetCache')) {
    function GetCache($prefix, $key, $is_memcache = TRUE)
    {
        global $cache_helper_config;
        $key = md5($key);
        /* 如果启用MC缓存 */
        if ($is_memcache === TRUE && !empty($cache_helper_config['memcache']) && $cache_helper_config['memcache']['is_mc_enable'] === 'Y') {
            $mc_path = empty($cache_helper_config['memcache']['mc'][substr($key, 0, 1)]) ? $cache_helper_config['memcache']['mc']['default'] : $cache_helper_config['memcache']['mc'][substr($key, 0, 1)];
            $mc_path = parse_url($mc_path);
            $key = ltrim($mc_path['path'], '/').'_'.$prefix.'_'.$key;
            if (empty($GLOBALS['mc_'.$mc_path['host']])) {
                $GLOBALS['mc_'.$mc_path['host']] = new Memcache();
                $GLOBALS['mc_'.$mc_path['host']]->connect($mc_path['host'], $mc_path['port']);
            }
            return $GLOBALS['mc_'.$mc_path['host']]->get($key);
        }
        $key = substr($key, 0, 2).'/'.substr($key, 2, 2).'/'.substr($key, 4, 2).'/'.$key;
        $result = @file_get_contents(DEDEDATA."/cache/$prefix/$key.php");

        if ($result === false) {
            return false;
        }
        $result = str_replace("<?php exit('dedebiz');?>\n\r", "", $result);
        $result = @unserialize($result);
        if ($result['timeout'] != 0 && $result['timeout'] < time()) {
            return false;
        }
        return $result['data'];
    }
}


/**
 *  写缓存
 *
 * @access    public
 * @param     string  $prefix  前缀
 * @param     string  $key  键
 * @param     string  $value  值
 * @param     string  $timeout  缓存时间
 * @return    int
 */
if (!function_exists('SetCache')) {
    function SetCache($prefix, $key, $value, $timeout = 3600, $is_memcache = TRUE)
    {
        global $cache_helper_config;
        $key = md5($key);
        /* 如果启用MC缓存 */
        if (!empty($cache_helper_config['memcache']) && $cache_helper_config['memcache']['is_mc_enable'] === 'Y' && $is_memcache === TRUE) {
            $mc_path = empty($cache_helper_config['memcache']['mc'][substr($key, 0, 1)]) ? $cache_helper_config['memcache']['mc']['default'] : $cache_helper_config['memcache']['mc'][substr($key, 0, 1)];
            $mc_path = parse_url($mc_path);
            $key = ltrim($mc_path['path'], '/').'_'.$prefix.'_'.$key;
            if (empty($GLOBALS['mc_'.$mc_path['host']])) {
                $GLOBALS['mc_'.$mc_path['host']] = new Memcache();
                $GLOBALS['mc_'.$mc_path['host']]->connect($mc_path['host'], $mc_path['port']);
                //设置数据压缩门槛
                //$GLOBALS ['mc_'.$mc_path ['host']]->setCompressThreshold(2048, 0.2);
            }
            $result = $GLOBALS['mc_'.$mc_path['host']]->set($key, $value, MEMCACHE_COMPRESSED, $timeout);
            return $result;
        }
        $key = substr($key, 0, 2).'/'.substr($key, 2, 2).'/'.substr($key, 4, 2).'/'.$key;
        $tmp['data'] = $value;
        $tmp['timeout'] = $timeout != 0 ? time() + (int) $timeout : 0;
        $cache_data = "<?php exit('dedebiz');?>\n\r".@serialize($tmp);
        return @PutFile(DEDEDATA."/cache/$prefix/$key.php",  $cache_data);
    }
}


/**
 *  删除缓存
 *
 * @access    public
 * @param     string  $prefix  前缀
 * @param     string  $key  键
 * @param     string  $is_memcache  是否为memcache缓存
 * @return    string
 */
if (!function_exists('DelCache')) {
    /* 删缓存 */
    function DelCache($prefix, $key, $is_memcache = TRUE)
    {
        global $cache_helper_config;
        $key = md5($key);
        /* 如果启用MC缓存 */
        if (!empty($cache_helper_config['memcache']) && $cache_helper_config['memcache']['is_mc_enable'] === TRUE && $is_memcache === TRUE) {
            $mc_path = empty($cache_helper_config['memcache']['mc'][substr($key, 0, 1)]) ? $cache_helper_config['memcache']['mc']['default'] : $cache_helper_config['memcache']['mc'][substr($key, 0, 1)];
            $mc_path = parse_url($mc_path);
            $key = ltrim($mc_path['path'], '/').'_'.$prefix.'_'.$key;
            if (empty($GLOBALS['mc_'.$mc_path['host']])) {
                $GLOBALS['mc_'.$mc_path['host']] = new Memcache();
                $GLOBALS['mc_'.$mc_path['host']]->connect($mc_path['host'], $mc_path['port']);
            }
            return $GLOBALS['mc_'.$mc_path['host']]->delete($key);
        }
        $key = substr($key, 0, 2).'/'.substr($key, 2, 2).'/'.substr($key, 4, 2).'/'.$key;
        return @unlink(DEDEDATA."/cache/$prefix/$key.php");
    }
}