<?php
/**
 * 权限认证,账户操作类
 * 
 * @author XMG 2014.2.7 
 * @copyright yoho.cn
 * @name Facade_Auth
 * @version 0.1
 *
 */
class Facade_Auth 
{
	/**
	 * 账号类型 - 邮箱
	 * @var int
	 */
	const AUTH_TYPE_EMAIL =  1  ;
	
	/**
	 * 账号类型 - 手机
	 * @var int
	 */
	const AUTH_TYPE_MOBILE =  2  ;
	
	/**
	 * 账号类型 - 微博
	 * @var int
	 */
	const AUTH_TYPE_WEIBO =  3  ;
	
	/**
	 * 账号类型 - QQ
	 * @var int
	 */
	const AUTH_TYPE_QQ =  4  ;
	
	/**
	 * 账号类型 - 支付宝
	 * @var int
	 */
	const AUTH_TYPE_ALIPAY =  5  ;
	
	/**
	 * 账号类型 - 人人
	 * @var int
	 */
	const AUTH_TYPE_RENREN =  6  ;
	
	/**
	 * 账号类型 - 豆瓣
	 * @var int
	 */
	const AUTH_TYPE_DOUBAN =  7  ;
	
	/**
	 * 账号类型 - FACEBOOK
	 * @var int
	 */
	const AUTH_TYPE_FACEBOOK =  8  ;
	
	/**
	 * 账号类型 - INSTAGRAM
	 * @var int
	 */
	const AUTH_TYPE_INSTAGRAM =  9  ;
        
    /**
     * 账号类型 - 腾讯微博
     * @var int
     */
    const AUTH_TYPE_QQ_WB = 10;
    
     /**
     * 账号类型 - 微信
     * @var int
     */
    const AUTH_TYPE_WEXIN = 11;
	
	/**
	 * 数据层
	 *
	 * @var Service_Admin_Auditing
	 */
	private static $service = null;
	
	/**
	 * 数据层 -- 登录
	 *
	 * @var Service_Admin_Auditing
	 */
	private static $service_session = null;
	
	//COOKIE配置
	const COOKIE_MERGED = 'yh_passport';
	const PERSIST_LIFE = 2592000; // 一个月
	const AUTH_EXPIRE = 60;
	
	/**
	 * 返回Service对象
	 *
	 * @return Service_Auth
	 */
	public static function service ()
	{
		if ( self::$service == null )
		{
			self::$service = new Service_Auth();
		}
		return self::$service;
	}
	
	/**
	 * 返回SESSION服务对象
	 *
	 * @return Service_Session
	 */
	public static function serviceSession ()
	{
		if ( self::$service_session == null )
		{
			self::$service_session = new Service_Session();
		}
		return self::$service_session;
	}
	
	/**
	 * 返回允许的Auth类型
	 */
	public static function getAllowAuthType()
	{
		return array
		(
			self::AUTH_TYPE_EMAIL	=> '邮箱',
			self::AUTH_TYPE_MOBILE	=> '手机号',
			self::AUTH_TYPE_WEIBO	=> '新浪Weibo',
			self::AUTH_TYPE_QQ		=> 'QQ',
			self::AUTH_TYPE_ALIPAY  => '支付宝',
			self::AUTH_TYPE_RENREN	=> '人人网',
			self::AUTH_TYPE_DOUBAN	=> '豆瓣网',
			self::AUTH_TYPE_FACEBOOK => 'FACE BOOK',
			self::AUTH_TYPE_INSTAGRAM => 'INSTAGRAM',
			self::AUTH_TYPE_WEXIN => 'wechat'
		);
	}
	
	/**
	 * 校验是否为手机
	 * @param unknown $mobile
	 */
	public static function isMobile($mobile)
	{
        //999开头测试手机号直接通过验证
        if(is_numeric($mobile) && strpos($mobile, '999') === 0){
            $ret = true;
        }else{
            $ret = preg_match('/^1[3|4|5|7|8][0-9]\d{8}$/', $mobile);
        }
        return $ret;
	}
	
	/**
	 * 构建密码及盐    如果指定盐,则使用该盐进行加密密码 ，否则，自动生成盐
	 * @param string $password 明文密码
	 * @param string $salt 盐
	 */
	public static function buildPassword($password,$salt = '')
	{
		$password = Lib_AuthCode::makePass($password);
		return array('password' => $password, 'salt' => '' );
	}
	
	/**
	 * 比对检测密码是否正确 ,是否允许登录
	 * @param unknown $inputPassword   明文密码
	 * @param unknown $encryptPassword  加密密码 
	 * @param unknown $salt  盐
	 */
	public static function ComparisonPassword($inputPassword, $encryptPassword)
	{
	    $passwordList = explode(':', trim($encryptPassword));
	    $crypt = $passwordList[0];
	    $salt = '';
	    if (count($passwordList) == 2)
	    {
	        $salt = $passwordList[1];
	    }
	    $decode = Lib_AuthCode::getCrypted($inputPassword . $salt, $salt);
	    if ($crypt != $decode)
	    {
	        return false;
	    }
	    return true;
	}
	
	/**
	 * 设置或更新密码
	 * @param unknown $uid
	 * @param unknown $password
	 * @param unknown $password_salt
	 */
	public static function setPassword($uid, $password,$checkUser = false )
	{
		do
		{
			if (!$uid || !$password)
			{
				$ret = array('code' => Config_Code::$error['missing_parameter']['code'],'message' => Config_Code::$error['missing_parameter']['message']);
				break ;
			}
			if (strlen($password) < 6)
			{
				$ret = array('code' => Config_Code::$error['pwd_format']['code'], 'message' => Config_Code::$error['pwd_format']['message']);
				break ;
			}
			if ($checkUser) 
			{
				if (!Facade_Userinfo::getUserinfoByUid($uid))
				{
					$ret = array('code' => Config_Code::$error['user_not_exist']['code'],'message' => Config_Code::$error['user_not_exist']['message']);
					break ;
				}
			}
			$pwd_info = self::buildPassword($password);
			$update = self::service()->setPassword($uid, $pwd_info['password'], '' );
			if ($update) 
			{
				$ret = true;
				break ;
			}
			$ret = array('code' => Config_Code::$error['system']['code'],'message' => Config_Code::$error['system']['message']);
			break ;
		}while (false);
		return $ret ;
	}
        
	/**
	 * 设置登录验证信息
         * 
	 * @param integer $uid  用户ID
	 * @param integer $auth_type  验证的类型 
	 * @param string $auth_id  验证的信息，与$auth_type具有唯一性
         * @return boolean, array
	 */
	public static function setAuth($uid, $auth_type, $auth_id)
	{
        do 
        {
            // 校验参数
            if (!$uid || !$auth_type || !$auth_id)
            {
                $ret = array('code' => Config_Code::$error['missing_parameter']['code'], 'message' => Config_Code::$error['missing_parameter']['message']);
                break;
            }

            // 检测账号类型
            $allowAuthType = self::getAllowAuthType();
            if (!isset($allowAuthType[$auth_type])) 
            {
                $ret = array('code' => Config_Code::$error['account_type']['code'], 'message' => Config_Code::$error['account_type']['message']);
                break;
            }

            // 获取用户信息 -- 校验用户是否存在
            $userinfo = Facade_Userinfo::getUserinfoByUid($uid);
            if (!$userinfo) 
            {
                $ret = array('code' => Config_Code::$error['user_not_exist']['code'], 'message' => Config_Code::$error['user_not_exist']['message']);
                break;
            }
				
			//TODO 判断是否存在当前账号是否已经存在
            //$exist_auth = self::getAuthByTypeAndAid($auth_type, $auth_id);
            $exist_auth = self::getAuthByTypeAndAidNocache($auth_type, $auth_id);
            if(!empty($exist_auth))
            {
                $ret = array('code' => Config_Code::$error['account_exist']['code'], 'message' => Config_Code::$error['account_exist']['message']);
                break;
            }
			
            // 设置auth
            if (!self::service()->setAuth($uid, $auth_type, $auth_id) )
            {
                $ret = array('code' => Config_Code::$error['account_set']['code'], 'message' => Config_Code::$error['account_set']['message']);
                break;
            }
            
            $ret = true;
            
        } while (false);
        
        return $ret;	
	}
	
	  /**
	   * 解除绑定
	   * @param unknown $id
	   * @param unknown $type
	   */
	  public static function delAuth($uid, $type,$auth_id)
	  {
	      do
	      {
	          if (!$uid || !$type || !$auth_id) 
	          {
	              $ret = array('code' => Config_Code::$error['missing_parameter']['code'], 'message' => Config_Code::$error['missing_parameter']['message']);
	              break;
	          }
	          //获取所有账号
	          $all_auth = Facade_Auth::getAllAuth($uid);
	          if ($all_auth && count($all_auth) <= 1)
	          {
	              //不允许解除绑定
	              $ret = array('code' => Config_Code::$error['account_only_one']['code'], 'msg' => Config_Code::$error['account_only_one']['message']);
	              break;
	          }
	          //删除绑定
	          if (self::service()->delAuth($uid, $type, $auth_id))
	          {
	               return true;
	          }
	          $ret = array('code' => Config_Code::$error['system']['code'], 'msg' => Config_Code::$error['system']['message']);
	          break;
	      }while (false);
	      return $ret ;
	  }

	  
       /**
        * 修改登录账号
        * 
        * @param integer $id  唯一的SSO ID
        * @param integer $type  登录类型
        * @param string $auth_id  原来的登录账号
        * @param string $new_auth_id  新的登录账号
        * @return boolean  (false:失败, true:成功)
        */
       public static function updAuth($id, $type, $auth_id, $new_auth_id)
       {
           $result = false;

           if (is_numeric($id) && is_numeric($type) && isset($auth_id) && isset($new_auth_id))
           {
               $result = self::service()->updAuth($id, $type, $auth_id, $new_auth_id);
           }

           return $result;
       }
       
       /**
        * 获取登录账号的信息
        * 
        * @param type $type  登录类型
        * @param type $auth_id  登录账号
        * @return array
        */
       public static function getAuthByTypeAndAid($type, $auth_id)
       {
            $result = array();
            
            if (isset($auth_id) && is_numeric($type))
            {
                $result = self::service()->getAuthByTypeAndAid($type, $auth_id);
                if(!$result)
                {
                    if($type==self::AUTH_TYPE_FACEBOOK)
                    {
                        $auth_id = self::service()->getFacebookRela($auth_id);
                        $result = self::service()->getAuthByTypeAndAid($type, $auth_id);
                    }
                }
            }
            
            return $result;
       }

    /**
     * 获取登录账号的信息 没缓存
     *
     * @param type $type  登录类型
     * @param type $auth_id  登录账号
     * @return array
     */
    public static function getAuthByTypeAndAidNocache($type, $auth_id)
    {
        $result = array();

        if (isset($auth_id) && is_numeric($type))
        {
            $result = self::service()->getAuthByTypeAndAidNocache($type, $auth_id);
            if(!$result)
            {
                if($type==self::AUTH_TYPE_FACEBOOK)
                {
                    $auth_id = self::service()->getFacebookRela($auth_id);
                    $result = self::service()->getAuthByTypeAndAidNocache($type, $auth_id);
                }
            }
        }

        return $result;
    }


	/**
	 * 获取所有口令列表
	 */
	public static function getAllAuth($uid)
	{
	    if (!$uid) 
	    {
	    	return array();
	    }
		return self::service()->getAllAuth($uid);
	}
        
				
	/**
	 * 注册 -- 供邮箱和手机号注册
	 * @param string $account
	 * @param string $pwd
	 */
	public static function register($account, $password ,$app_id,$area = '')
	{
		$auth_type = $uid = null ;
		do
		{
			//验证账户
			if ($account == '')
			{
				$ret = array('code' => Config_Code::$error['account_format']['code'], 'message' => Config_Code::$error['account_format']['message']);
				break ;
			}
			$service = self::service();
			// 验证账号类型
            //2015-4-13 wuxiao app增加国际手机号登录注册
			if (self::isMobile($account))
			{//如果符合国内手机号规则
				//手机
				$auth_type = self::AUTH_TYPE_MOBILE ;
                //如果area非空并且area不是86，就是国际手机号
                if (!empty($area) && (trim((string)$area, '0') != '86')){
                    $area = trim((string)$area, '0');
                    $account = "00{$area}-{$account}";
                }
            }elseif (is_numeric($account) && !empty($area) && (trim((string)$area, '0') != '86'))
            {//如果不符合国内手机号规则但是是数字，必须带有area并且are不是86，就是国际手机号
                $auth_type = self::AUTH_TYPE_MOBILE ;
                $area = trim((string)$area, '0');
                $account = "00{$area}-{$account}";
            }elseif (filter_var($account,FILTER_VALIDATE_EMAIL))
			{
				//邮箱
				$auth_type = self::AUTH_TYPE_EMAIL ;
			}else
			{
				//其它 -- 系统错误
				$ret = array('code' => Config_Code::$error['account_format']['code'], 'message' => Config_Code::$error['account_format']['message']);
				break ;
			}
			
			//验证密码
			if ($password == '')
			{
				$ret = array('code' => Config_Code::$error['pwd_format']['code'], 'message' => Config_Code::$error['pwd_format']['message']);
				break ;
			}
			if (strlen($password) < 6)
			{
				$ret = array('code' => Config_Code::$error['pwd_format']['code'], 'message' => Config_Code::$error['pwd_format']['message']);
				break ;
			}
		
			//检测用户是否存在
			$auth_info = $service->getAuthByTypeAndAid($auth_type, $account);
			if ($auth_info) 
			{
				$ret = array('code' => Config_Code::$error['user_exist']['code'], 'message' => Config_Code::$error['user_exist']['message']);
				break ;
			}
		
			//创建用户
			$userinfo = array('gender' => 3, 'app_id' => $app_id);//初始化用户信息--必须
			$uid = $service->setUserinfo($userinfo);
			if (!$uid)
			{
				$ret = array('code' => Config_Code::$error['system']['code'], 'message' => Config_Code::$error['system']['code']);
				break ;
			}
			
			$pwd_info = self::buildPassword($password);
			//绑定登录账号
			$bind = $service->setAuth($uid, $auth_type, $account);
			//设置密码
			$setPwd = self::setPassword($uid, $password);
			if (!$bind || $setPwd !== true) 
			{
				//回滚用户信息--删除该用户
				$service->_deleteUserinfo($uid);
				$ret = array('code' => Config_Code::$error['system']['code'], 'message' => Config_Code::$error['system']['code']);
				break ;
			}
			//成功返回
			$ret = array('code' => Config_Code::$success['user_register']['code'], 'message' => Config_Code::$success['user_register']['message'],'uid' => $uid);
		}while (false);
		return $ret  ;
	}
	
	/**
	 * 根据账号获取用户auth信息
	 * @param unknown $account
	 * @param string $auth_type
	 */
    public static function getAuthByAccount($account , $auth_type = null, $area = '')
	{
		$account = trim($account);
		if (!$account) 
		{
			return array();
		}
		if (!empty($area) && (trim((string)$area, '0') != '86')){
		    $area = trim((string)$area, '0');
		    $account = "00{$area}-{$account}";
		    $auth_type = self::AUTH_TYPE_MOBILE ;
		}
		    
		    
		//如果没有强制指定账号类型,则计算其是否为邮箱或手机号
		if (!$auth_type) 
		{
			// 验证账号类型
			if (self::isMobile($account))
			{
				//手机
				$auth_type = self::AUTH_TYPE_MOBILE ;
			}elseif (filter_var($account,FILTER_VALIDATE_EMAIL))
			{
				//邮箱
				$auth_type = self::AUTH_TYPE_EMAIL ;
			}else
			{
				return array();
			}
		}
		$ret = self::service()->getAuthByTypeAndAid($auth_type, $account);
		return $ret ? $ret : array() ;
	}
	
	/**
	 * 获取密码
	 * @param unknown $uid
	 */
	public static function getPassword($uid)
	{
	    $ret = self::service()->getPassword($uid) ;
	    return isset($ret['password'])?$ret['password']:'';
	}
	
	
    /**
     * 	检测登录
     * @param string $account 账号
     * @param string $persistent  是否自动登录
     * @param string $inputPassword 密码
     * @param boolean $is_login 是否登录
     * @return array array(code => message )
     *    code:
     *    	200: 成功登录
     *    	500: 系统错误
     *    	400001: 对不起,该用户不存
     *    	400002: 密码错误
     *    	400003: 由于涉及违规操作，该账号已被封
     */
    public static function checkLogin ($account, $inputPassword, $setCookie = true, $persistent = 0  , $is_login = true, $area = '')
    {
    	$auth_type = null ;
    	do 
    	{
            if (!$account || !$inputPassword)
    		{
    			$ret = array('code' => Config_Code::$error['missing_parameter']['code'], 'message' => Config_Code::$error['missing_parameter']['message']);
    			break ;
    		}
            
    		// 验证账号类型
    		//2015-4-13 wuxiao app增加国际手机号登录注册
			if (self::isMobile($account))
			{//如果符合国内手机号规则
				//手机
				$auth_type = self::AUTH_TYPE_MOBILE ;
                //如果area非空并且area不是86，就是国际手机号
                if (!empty($area) && (trim((string)$area, '0') != '86')){
                    $area = trim((string)$area, '0');
                    $account = "00{$area}-{$account}";
                }
            }elseif (is_numeric($account) && !empty($area) && (trim((string)$area, '0') != '86'))
            {//如果不符合国内手机号规则但是是数字，必须带有area并且are不是86，就是国际手机号
                $auth_type = self::AUTH_TYPE_MOBILE ;
                $area = trim((string)$area, '0');
                $account = "00{$area}-{$account}";
            }elseif (filter_var($account,FILTER_VALIDATE_EMAIL))
    		{
    			//邮箱
    			$auth_type = self::AUTH_TYPE_EMAIL ;
    		}else
    		{
    			$ret = array('code' => Config_Code::$error['account_format']['code'], 'message' => Config_Code::$error['account_format']['message']);
    			break ;
    		}
    		
    		//获取用户口令信息
    		$auth = self::service()->getAuthByTypeAndAidNocache($auth_type, $account);
    		//检测口令是否存在
    		if (!$auth)
    		{
				//file_put_contents('/tmp/sso-'.date('Y-m-d').'.log', '登录Facade错误['.date('H:i:s').']-账户：'.$account.' 类型：'.$auth_type.' 地区码：'.$area."\n", FILE_APPEND);
				$ret = array('code' => Config_Code::$error['user_not_exist']['code'], 'message' => Config_Code::$error['user_not_exist']['message']);
    			break ;
    		}
    		$uid = $auth['uid'] ;
    		
    		//是否禁用
    		if (Facade_Userinfo::isDisabled($uid))
    		{
    			$ret = array('code' => Config_Code::$error['user_disabled']['code'], 'message' => Config_Code::$error['user_disabled']['message']);
    			break ;
    		}
    		
    		$pwd_info = self::service()->getPassword($uid) ;
    		if (!$pwd_info) 
    		{
    			$ret = array('code' => Config_Code::$error['pwd_error']['code'], 'message' => Config_Code::$error['pwd_error']['message']);
    			break ;
    		}
    		//比对密码是否正确
    		if(!self::ComparisonPassword($inputPassword, $pwd_info['password'], $pwd_info['password_salt']))
    		{
				$ret = array('code' => Config_Code::$error['pwd_error']['code'], 'message' => Config_Code::$error['pwd_error']['message']);
    			break ;
    		}
    		
    		//如果不需要登录,仅检验,则直接返回用户信息
    		if ($is_login === false) 
    		{
    			$ret = array('code' => Config_Code::$success['user_login']['code'],'message' => Config_Code::$success['user_login']['message'],'uid' => $uid);
    		    break ;
    		}
    		
    		// 是否自动登录
    		$persistent = $persistent ? true : false;
    		// 是否要设置cookie. 在手机登录的时候, 没有cookie
    		$loginRet = self::login($uid, $persistent, $setCookie);
    		
    		if(!$loginRet)
    		{
    			//系统错误
    			$ret = array('code' => Config_Code::$error['system']['code'],'message' => Config_Code::$error['system']['message']);
    			break;
    		}
    		$ret = array('code' => Config_Code::$success['user_login']['code'],'message' => Config_Code::$success['user_login']['message'],'uid' => $uid);
    	}while (false);
        return $ret ;
    }
    
    /**
     * 登录操作
     *
     * @param $uid integer
     * @param $rememberme boolean
     * @return boolean
     */
    public static function login ($uid, $rememberMe = true, $setCookie = true)
    {
    	//@todo xiaoma 2013.3.8 校验当前是否已登录,如果已经登录，则不再进行重新登录,否则一直存入Session表
    	$login_uid = self::getAuthedUid() ;
    	$session = self::serviceSession();
    	$agent = $session->getAgentTxt() ;
    	$sessionKey = false;
    	if ($login_uid == $uid && $agent == 'web' && !empty($uid))
    	{
    		$sessionKey =  $session->getUserLastSession($uid);
    	}
    	else
    	{
    	    //@FIXED 先检查是否有该用户,否则不予登录   XMG - 2014.03.27 00:38
    	    if (!Facade_Userinfo::getUserinfoByUid($uid))
    	    {
    	    	return false ;
    	    }
    		$sessionKey = self::createSessionKey ($uid, $rememberMe);
    		if (isset($sessionKey) && !empty($sessionKey) && $setCookie)
    		{
    			self::setAuthedCookie($uid, $sessionKey, $rememberMe);
    		}
    	}
    	return $sessionKey ? $sessionKey : false ;
    }
    

    /**
     * 登出系统
     *
     * @param int $set_uid 指定强制退出的用户ID
     * @return true
     */
    public static function logout ($set_uid = 0)
    {
    	$uid = false;
    	// 是否是管理员制定强制退出的
    	$adminKick = false;
    
    	if ($set_uid)
    	{
    		$uid = $set_uid;
    		$adminKick = true;
    	}
    	else
    	{
    		$uid = self::getAuthedUid();
    	}
    
    	if ($uid)
    	{
    		$status = false;
    		// 如果是管理员退出的, 则删除所有此用户的session
    		if ($adminKick)
    		{
    			$status = self::serviceSession()->deleteSessionByUid($uid);
    		}
    		else
    		{
    			$sessionkey = self::getAuthedCookieSession();
    			// 否则只删除当前的
    			$status = self::serviceSession()->deleteSession($sessionkey);
    		}
    	}
    
    	if ($set_uid === 0)
    	{
    		// 删除新系统的登录Cookie
    		self::unsetAuthedCookie();
    
    	}
    
    	return true;
    }
    
    /**
     * 得到浏览器端用户cookie's sessionkey
     *
     * @return string | false
     */
    public static function getAuthedCookieSession ()
    {
        return ($a = self::getAuthedCookieArray()) ? $a['magic'] : false;
    }
    
    
    /**
     * 得到Session中的用户编码
     *
     * @return integer false
     */
    public static function getAuthedUid ()
    {
    	$return = false;
    	$aAuth = self::getAuthedCookieArray();
    	if ($aAuth)
    	{
    		$aSession = self::serviceSession()->getSession($aAuth['magic']);
    		if ($aSession)
    		{
                    $return = $aSession['uid'];
    		}
    		else
    		{
                    self::unsetAuthedCookie();
    		}
    	}
    	return $return;
    }
    
    /**
     * 得到浏览器端COOKIE 验证数组
     *
     * @return array | false
     */
    public static function getAuthedCookieArray ()
    {
    	$return = false;
    	if (! isset($_COOKIE[self::COOKIE_MERGED]))
    	{
    		$return = false;
    	}
    	else
    	{
    		$values = explode(',', $_COOKIE[self::COOKIE_MERGED]);
    		$uid = isset($values[0]) ? (int) $values[0] : false;
    		//sessionkey
    		$magic = isset($values[1]) ? self::authCookieCryptDecode($values[1]) : false;
    		$persist = isset($values[2]) ? $values[2] === 'y' : false;
    		$authExpire = isset($values[3]) ? intval($values[3], 10) : time() + self::AUTH_EXPIRE;
    		$return = array('uid' => $uid, 'magic' => $magic, 'persist' => $persist,
    				'authexpire' => $authExpire);
    	}
    	return $return;
    }
    /**
     * 得到已经登录的用户session全部信息
     *
     * @return array false
     */
    public static function getAuthedSessionArray ()
    {
    	$return = false;
    	$aAuth = self::getAuthedCookieArray();
    	$aSession = self::serviceSession()->getSession($aAuth['magic']);
    	if ($aAuth && $aSession && $aSession['uid'] == $aAuth['uid'])
    	{
    		$return = $aSession;
    	}
    	else
    	{
    		self::unsetAuthedCookie();
    	}
    	return $return;
    }
    
    /**
     * 根据SID获取用户UID
     * @param unknown $sid
     */
    public static function getSessionBySid($sid)
    {
    	return self::serviceSession()->getSession($sid);
    }
    
    /**
     * 解密存储到浏览器端的cookie内容
     *
     * @param $string string
     * @return string
     */
    private static function authCookieCryptDecode ($string)
    {
    	$str1 = substr($string, 0, 16);
    	$str2 = substr($string, - 16);
    	$return = $str1 . $str2;
    	return strlen($return) == 32 ? $return : '';
    }
    
    /**
     * 摧毁客户端用户Cookie
     *
     * @return void
     */
    private static function unsetAuthedCookie ()
    {
    	$time = time() - self::PERSIST_LIFE;
    
    	if (isset($_COOKIE[self::COOKIE_MERGED]))
    	{
    		setcookie(self::COOKIE_MERGED, null, $time, '/', COOKIE_DOMAIN);
    	}
    }
    
    /**
     * 设置浏览器端用户cookie(uid+sesionkey+是否有效+过期时间)
     *
     * @param $uid integer 用户编码
     * @param $sessionkey string
     * @param $persistent boolean
     * @return boolean
     */
    private static function setAuthedCookie ($uid, $sessionkey, $persistent = true)
    {
    	$expire = $persistent ? time() + self::PERSIST_LIFE : 0;
    	$authExpire = time() + self::AUTH_EXPIRE;
    	if ($sessionkey)
    	{
    		$values = $uid . ',' . self::authCookieCryptEncode($sessionkey) .
    		',' . ($persistent ? 'y' : 'n') . ',' . $authExpire;
    		//TODO,记录用户登录信息（用户UID, IP,sessionkey 时间, agent, 用户类型）
    		return setcookie(self::COOKIE_MERGED, $values, $expire, '/', COOKIE_DOMAIN);
    	}
    	else
    	{
    		return false;
    	}
    }
    
    /**
     * 创建SessionKey
     * @param unknown $uid
     * @param string $rememberMe
     * @return Ambigous <NULL, integer, unknown, string, Sring, long, number, multitype:NULL , boolean>
     */
    private static function createSessionKey ($uid, $rememberMe = true)
    {
    	$sessionKey = null;
    
    	$create = self::serviceSession()->createSession($uid,$rememberMe);
    	if ($create)
    	{
    		$sessionKey = $create['sessionkey'];
    	}
    
    	return $sessionKey;
    }
    
    /**
     * 加密存储到浏览器端的cookie内容信息
     *
     * @param $string string
     * @return string
     */
    private static function authCookieCryptEncode ($string)
    {
    	$str1 = substr($string, 0, 16);
    	$str2 = substr(md5('crypt.yoho.cn' . mt_rand(1, 999999)), 0, 8);
    	$str3 = substr($string, 16);
    	return $str1 . $str2 . $str3;
    }
    
}