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<?php

/**
 * Simple Machines Forum (SMF)
 *
 * @package SMF
 * @author Simple Machines http://www.simplemachines.org
 * @copyright 2019 Simple Machines and individual contributors
 * @license http://www.simplemachines.org/about/smf/license.php BSD
 *
 * @version 2.1 RC1
 */

if (!defined('SMF'))
    die('Hacking attempt...');

/**
 * Our Cache API class
 *
 * @package cacheAPI
 */
class apc_cache extends cache_api
{
    /**
     * {@inheritDoc}
     */
    public function isSupported($test = false)
    {
        $supported = function_exists('apc_fetch') && function_exists('apc_store');

        if ($test)
            return $supported;
        return parent::isSupported() && $supported;
    }

    /**
     * {@inheritDoc}
     */
    public function getData($key, $ttl = null)
    {
        $key = $this->prefix . strtr($key, ':/', '-_');

        return apc_fetch($key . 'smf');
    }

    /**
     * {@inheritDoc}
     */
    public function putData($key, $value, $ttl = null)
    {
        $key = $this->prefix . strtr($key, ':/', '-_');

        // An extended key is needed to counteract a bug in APC.
        if ($value === null)
            return apc_delete($key . 'smf');
        else
            return apc_store($key . 'smf', $value, $ttl);
    }

    /**
     * {@inheritDoc}
     */
    public function cleanCache($type = '')
    {
        // if passed a type, clear that type out
        if ($type === '' || $type === 'data')
        {
            // Always returns true.
            apc_clear_cache('user');
            apc_clear_cache('system');
        }
        elseif ($type === 'user')
            apc_clear_cache('user');

        $this->invalidateCache();
        return true;
    }

    /**
     * {@inheritDoc}
     */
    public function getVersion()
    {
        return phpversion('apc');
    }
}

?>