<?php

define('IN_DISCUZ', FALSE);

define('UC_CLIENT_VERSION', '1.5.0');	//note UCenter 版本标识
define('UC_CLIENT_RELEASE', '20081031');

define('API_DELETEUSER', 1);		//note 用户删除 API 接口开关
define('API_RENAMEUSER', 1);		//note 用户改名 API 接口开关
define('API_GETTAG', 1);		//note 获取标签 API 接口开关
define('API_SYNLOGIN', 1);		//note 同步登录 API 接口开关
define('API_SYNLOGOUT', 1);		//note 同步登出 API 接口开关
define('API_UPDATEPW', 1);		//note 更改用户密码 开关
define('API_UPDATEBADWORDS', 1);	//note 更新关键字列表 开关
define('API_UPDATEHOSTS', 1);		//note 更新域名解析缓存 开关
define('API_UPDATEAPPS', 1);		//note 更新应用列表 开关
define('API_UPDATECLIENT', 1);		//note 更新客户端缓存 开关
define('API_UPDATECREDIT', 1);		//note 更新用户积分 开关
define('API_GETCREDITSETTINGS', 1);	//note 向 UCenter 提供积分设置 开关
define('API_GETCREDIT', 1);		//note 获取用户的某项积分 开关
define('API_UPDATECREDITSETTINGS', 1);	//note 更新应用积分设置 开关

define('API_RETURN_SUCCEED', '1');
define('API_RETURN_FAILED', '-1');
define('API_RETURN_FORBIDDEN', '-2');

define('DISCUZ_ROOT', './');

//note 普通的 http 通知方式
if(!defined('IN_UC')) {

    error_reporting(0);
    set_magic_quotes_runtime(0);

    defined('MAGIC_QUOTES_GPC') || define('MAGIC_QUOTES_GPC', get_magic_quotes_gpc());
    require_once DISCUZ_ROOT.'./config.inc.php';

    $_DCACHE = $get = $post = array();

    $code = @$_GET['code'];
    parse_str(_authcode($code, 'DECODE', UC_KEY), $get);
    if(MAGIC_QUOTES_GPC) {
        $get = _stripslashes($get);
    }

    $timestamp = time();
    if($timestamp - $get['time'] > 3600) {
        exit('Authracation has expiried');
    }
    if(empty($get)) {
        exit('Invalid Request');
    }
    $action = $get['action'];

    require_once DISCUZ_ROOT.'./uc_client/lib/xml.class.php';
    $post = xml_unserialize(file_get_contents('php://input'));

    if(in_array($get['action'], array('test', 'deleteuser', 'renameuser', 'gettag', 'synlogin', 'synlogout', 'updatepw', 'updatebadwords', 'updatehosts', 'updateapps', 'updateclient', 'updatecredit', 'getcreditsettings', 'updatecreditsettings'))) {
        require_once DISCUZ_ROOT.'./include/db_mysql.class.php';
        $GLOBALS['db'] = new dbstuff;
        $GLOBALS['db']->connect($dbhost, $dbuser, $dbpw, $dbname, $pconnect, true, $dbcharset);
        $GLOBALS['tablepre'] = $tablepre;
        unset($dbhost, $dbuser, $dbpw, $dbname, $pconnect);
        $uc_note = new uc_note();
        exit($uc_note->$get['action']($get, $post));
    } else {
        exit(API_RETURN_FAILED);
    }

//note include 通知方式
} else {

    require_once DISCUZ_ROOT.'./config.inc.php';
    require_once DISCUZ_ROOT.'./include/db_mysql.class.php';
    $GLOBALS['db'] = new dbstuff;
    $GLOBALS['db']->connect($dbhost, $dbuser, $dbpw, $dbname, $pconnect, true, $dbcharset);
    $GLOBALS['tablepre'] = $tablepre;
    unset($dbhost, $dbuser, $dbpw, $dbname, $pconnect);
}

class uc_note {

    var $dbconfig = '';
    var $db = '';
    var $tablepre = '';
    var $appdir = '';

    function _serialize($arr, $htmlon = 0) {
        if(!function_exists('xml_serialize')) {
            include_once DISCUZ_ROOT.'./uc_client/lib/xml.class.php';
        }
        return xml_serialize($arr, $htmlon);
    }

    function uc_note() {
        $this->appdir = substr(dirname(__FILE__), 0, -3);
        $this->dbconfig = $this->appdir.'./config.inc.php';
        $this->db = $GLOBALS['db'];
        $this->tablepre = $GLOBALS['tablepre'];
    }

    function test($get, $post) {
        return API_RETURN_SUCCEED;
    }

    function deleteuser($get, $post) {
        $uids = $get['ids'];
        !API_DELETEUSER && exit(API_RETURN_FORBIDDEN);

        return API_RETURN_SUCCEED;
    }

    function renameuser($get, $post) {
        $uid = $get['uid'];
        $usernameold = $get['oldusername'];
        $usernamenew = $get['newusername'];
        if(!API_RENAMEUSER) {
            return API_RETURN_FORBIDDEN;
        }

        return API_RETURN_SUCCEED;
    }

    function gettag($get, $post) {
        $name = $get['id'];
        if(!API_GETTAG) {
            return API_RETURN_FORBIDDEN;
        }

        $return = array();
        return $this->_serialize($return, 1);
    }

    function synlogin($get, $post) {
        $uid = $get['uid'];
        $username = $get['username'];
        if(!API_SYNLOGIN) {
            return API_RETURN_FORBIDDEN;
        }

        header('P3P: CP="CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR"');
        _setcookie('Example_auth', _authcode($uid."\t".$username, 'ENCODE'));
    }

    function synlogout($get, $post) {
        if(!API_SYNLOGOUT) {
            return API_RETURN_FORBIDDEN;
        }

        //note 同步登出 API 接口
        header('P3P: CP="CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR"');
        _setcookie('Example_auth', '', -86400 * 365);
    }

    function updatepw($get, $post) {
        if(!API_UPDATEPW) {
            return API_RETURN_FORBIDDEN;
        }
        $username = $get['username'];
        $password = $get['password'];
        return API_RETURN_SUCCEED;
    }

    function updatebadwords($get, $post) {
        if(!API_UPDATEBADWORDS) {
            return API_RETURN_FORBIDDEN;
        }
        $cachefile = $this->appdir.'./uc_client/data/cache/badwords.php';
        $fp = fopen($cachefile, 'w');
        $data = array();
        if(is_array($post)) {
            foreach($post as $k => $v) {
                $data['findpattern'][$k] = $v['findpattern'];
                $data['replace'][$k] = $v['replacement'];
            }
        }
        $s = "<?php\r\n";
        $s .= '$_CACHE[\'badwords\'] = '.var_export($data, TRUE).";\r\n";
        fwrite($fp, $s);
        fclose($fp);
        return API_RETURN_SUCCEED;
    }

    function updatehosts($get, $post) {
        if(!API_UPDATEHOSTS) {
            return API_RETURN_FORBIDDEN;
        }
        $cachefile = $this->appdir.'./uc_client/data/cache/hosts.php';
        $fp = fopen($cachefile, 'w');
        $s = "<?php\r\n";
        $s .= '$_CACHE[\'hosts\'] = '.var_export($post, TRUE).";\r\n";
        fwrite($fp, $s);
        fclose($fp);
        return API_RETURN_SUCCEED;
    }

    function updateapps($get, $post) {
        if(!API_UPDATEAPPS) {
            return API_RETURN_FORBIDDEN;
        }
        $UC_API = $post['UC_API'];

        //note 写 app 缓存文件
        $cachefile = $this->appdir.'./uc_client/data/cache/apps.php';
        $fp = fopen($cachefile, 'w');
        $s = "<?php\r\n";
        $s .= '$_CACHE[\'apps\'] = '.var_export($post, TRUE).";\r\n";
        fwrite($fp, $s);
        fclose($fp);

        //note 写配置文件
        if(is_writeable($this->appdir.'./config.inc.php')) {
            $configfile = trim(file_get_contents($this->appdir.'./config.inc.php'));
            $configfile = substr($configfile, -2) == '?>' ? substr($configfile, 0, -2) : $configfile;
            $configfile = preg_replace("/define\('UC_API',\s*'.*?'\);/i", "define('UC_API', '$UC_API');", $configfile);
            if($fp = @fopen($this->appdir.'./config.inc.php', 'w')) {
                @fwrite($fp, trim($configfile));
                @fclose($fp);
            }
        }

        return API_RETURN_SUCCEED;
    }

    function updateclient($get, $post) {
        if(!API_UPDATECLIENT) {
            return API_RETURN_FORBIDDEN;
        }
        $cachefile = $this->appdir.'./uc_client/data/cache/settings.php';
        $fp = fopen($cachefile, 'w');
        $s = "<?php\r\n";
        $s .= '$_CACHE[\'settings\'] = '.var_export($post, TRUE).";\r\n";
        fwrite($fp, $s);
        fclose($fp);
        return API_RETURN_SUCCEED;
    }

    function updatecredit($get, $post) {
        if(!API_UPDATECREDIT) {
            return API_RETURN_FORBIDDEN;
        }
        $credit = $get['credit'];
        $amount = $get['amount'];
        $uid = $get['uid'];
        return API_RETURN_SUCCEED;
    }

    function getcredit($get, $post) {
        if(!API_GETCREDIT) {
            return API_RETURN_FORBIDDEN;
        }
    }

    function getcreditsettings($get, $post) {
        if(!API_GETCREDITSETTINGS) {
            return API_RETURN_FORBIDDEN;
        }
        $credits = array();
        return $this->_serialize($credits);
    }

    function updatecreditsettings($get, $post) {
        if(!API_UPDATECREDITSETTINGS) {
            return API_RETURN_FORBIDDEN;
        }
        return API_RETURN_SUCCEED;
    }
}

//note 使用该函数前需要 require_once $this->appdir.'./config.inc.php';
function _setcookie($var, $value, $life = 0, $prefix = 1) {
    global $cookiepre, $cookiedomain, $cookiepath, $timestamp, $_SERVER;
    setcookie(($prefix ? $cookiepre : '').$var, $value,
        $life ? $timestamp + $life : 0, $cookiepath,
        $cookiedomain, $_SERVER['SERVER_PORT'] == 443 ? 1 : 0);
}

function _authcode($string, $operation = 'DECODE', $key = '', $expiry = 0) {
    $ckey_length = 4;

    $key = md5($key ? $key : UC_KEY);
    $keya = md5(substr($key, 0, 16));
    $keyb = md5(substr($key, 16, 16));
    $keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : '';

    $cryptkey = $keya.md5($keya.$keyc);
    $key_length = strlen($cryptkey);

    $string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string.$keyb), 0, 16).$string;
    $string_length = strlen($string);

    $result = '';
    $box = range(0, 255);

    $rndkey = array();
    for($i = 0; $i <= 255; $i++) {
        $rndkey[$i] = ord($cryptkey[$i % $key_length]);
    }

    for($j = $i = 0; $i < 256; $i++) {
        $j = ($j + $box[$i] + $rndkey[$i]) % 256;
        $tmp = $box[$i];
        $box[$i] = $box[$j];
        $box[$j] = $tmp;
    }

    for($a = $j = $i = 0; $i < $string_length; $i++) {
        $a = ($a + 1) % 256;
        $j = ($j + $box[$a]) % 256;
        $tmp = $box[$a];
        $box[$a] = $box[$j];
        $box[$j] = $tmp;
        $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
    }

    if($operation == 'DECODE') {
        if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {
            return substr($result, 26);
        } else {
            return '';
        }
    } else {
        return $keyc.str_replace('=', '', base64_encode($result));
    }

}

function _stripslashes($string) {
    if(is_array($string)) {
        foreach($string as $key => $val) {
            $string[$key] = _stripslashes($val);
        }
    } else {
        $string = stripslashes($string);
    }
    return $string;
}