system.php

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<?php
/*
 You may not change or alter any portion of this comment or credits
 of supporting developers from this source code or any supporting source code
 which is considered copyrighted (c) material of the original comment or credit authors.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/

class System
{

    public $module = null;

    private $xoops = null;

    private function __construct()
    {
        $this->xoops = Xoops::getInstance();
    }

    public static function getInstance()
    {
        static $instance;
        if (!isset($instance)) {
            $class = __CLASS__;
            $instance = new $class();
        }
        return $instance;
    }

    public function checkRight()
    {
        if ($this->xoops->isUser()) {
            $this->xoops->module = $this->xoops->getModuleByDirname('system');
            if (!$this->xoops->user->isAdmin($this->xoops->module->mid())) {
                return false;
            }
        } else {
            return false;
        }
        return true;
    }

    public function cleanVars(&$global, $key, $default = '', $type = 'int')
    {
        switch ($type) {
            case 'array':
                $ret = (isset($global[$key]) && is_array($global[$key])) ? $global[$key] : $default;
                break;
            case 'date':
                $ret = (isset($global[$key])) ? strtotime($global[$key]) : $default;
                break;
            case 'string':
                $ret = (isset($global[$key])) ? filter_var($global[$key], FILTER_SANITIZE_MAGIC_QUOTES) : $default;
                break;
            case 'int':
            default:
                $ret = (isset($global[$key])) ? filter_var($global[$key], FILTER_SANITIZE_NUMBER_INT) : $default;
                break;
        }
        if ($ret === false) {
            return $default;
        }
        return $ret;
    }

    public function loadLanguage($name, $domain = '', $language = null)
    {
        $xoops = Xoops::getInstance();
        if (empty($name)) {
            return false;
        }
        $language = empty($language) ? $xoops->getConfig('language') : $language;
        $path = 'modules/' . $domain . '/language/';
        if (XoopsLoad::fileExists($file = $xoops->path($path . $language . '/admin/' . $name . '.php'))) {
            $ret = include_once $file;
        } else {
            $ret = include_once $xoops->path($path . 'english/admin/' . $name . '.php');
        }
        return $ret;
    }

    public function adminVersion($version, $value = '')
    {
        static $tblVersion = array();
        if (is_array($tblVersion) && array_key_exists($version . '.' . $value, $tblVersion)) {
            return $tblVersion[$version . '.' . $value];
        }
        $xoops = Xoops::getInstance();
        $path = $xoops->path('modules/system/admin/' . $version . '/xoops_version.php');
        if (XoopsLoad::fileExists($path)) {
            $modversion = array();
            include $path;
            $retvalue = $modversion[$value];
            $tblVersion[$version . '.' . $value] = $retvalue;
            return $retvalue;
        }
        return '';
    }

    public function cleanCache($cache)
    {
        $cachePath = \XoopsBaseConfig::get('var-path') . '/caches/';
        $total_smarty_cache = 0;
        $total_smarty_compile = 0;
        $total_xoops_cache = 0;
        if (!empty($cache)) {
            for ($i = 0; $i < count($cache); ++$i) {
                switch ($cache[$i]) {
                    case 1:
                        $files = glob($cachePath . 'smarty_cache/*.*');
                        $total_smarty_cache = 0;
                        foreach ($files as $filename) {
                            if (basename(strtolower($filename)) != 'index.html') {
                                unlink($filename);
                                ++$total_smarty_cache;
                            }
                        }
                        break;

                    case 2:
                        $files = glob($cachePath . 'smarty_compile/*.*');
                        $total_smarty_compile = 0;
                        foreach ($files as $filename) {
                            if (basename(strtolower($filename)) != 'index.html') {
                                unlink($filename);
                                ++$total_smarty_compile;
                            }
                        }
                        break;

                    case 3:
                        // ask the cache to clear itself
                        $status = Xoops::getInstance()->cache()->delete('system');
                        // this section captures legacy cache use only
                        $files = glob($cachePath . 'xoops_cache/*.*');
                        $total_xoops_cache = 0;
                        foreach ($files as $filename) {
                            if (basename(strtolower($filename)) != 'index.html') {
                                unlink($filename);
                                ++$total_xoops_cache;
                            }
                        }
                        $total_xoops_cache = $status || ($total_xoops_cache>0);
                        break;
                }
            }
            $ret['smarty_cache'] = $total_smarty_cache;
            $ret['smarty_compile'] = $total_smarty_compile;
            $ret['xoops_cache'] = $total_xoops_cache;
            return $ret;
        } else {
            return false;
        }
    }
}