用户模块开发

Const：

package com.mmall.common;

import com.google.common.collect.Sets;

import java.util.Set;

/**
 * Created by geely
 */
public class Const {

    public static final String CURRENT_USER = "currentUser";

    public static final String EMAIL = "email";
    public static final String USERNAME = "username";

    public interface ProductListOrderBy{
        Set<String> PRICE_ASC_DESC = Sets.newHashSet("price_desc","price_asc");
    }

    public interface Cart{
        int CHECKED = 1;//即购物车选中状态
        int UN_CHECKED = 0;//购物车中未选中状态

        String LIMIT_NUM_FAIL = "LIMIT_NUM_FAIL";
        String LIMIT_NUM_SUCCESS = "LIMIT_NUM_SUCCESS";
    }

    public interface Role{
        int ROLE_CUSTOMER = 0; //普通用户
        int ROLE_ADMIN = 1;//管理员
    }

    public enum ProductStatusEnum{
        ON_SALE(1,"在线");
        private String value;
        private int code;
        ProductStatusEnum(int code,String value){
            this.code = code;
            this.value = value;
        }

        public String getValue() {
            return value;
        }

        public int getCode() {
            return code;
        }
    }


    public enum OrderStatusEnum{
        CANCELED(0,"已取消"),
        NO_PAY(10,"未支付"),
        PAID(20,"已付款"),
        SHIPPED(40,"已发货"),
        ORDER_SUCCESS(50,"订单完成"),
        ORDER_CLOSE(60,"订单关闭");


        OrderStatusEnum(int code,String value){
            this.code = code;
            this.value = value;
        }
        private String value;
        private int code;

        public String getValue() {
            return value;
        }

        public int getCode() {
            return code;
        }

        public static OrderStatusEnum codeOf(int code){
            for(OrderStatusEnum orderStatusEnum : values()){
                if(orderStatusEnum.getCode() == code){
                    return orderStatusEnum;
                }
            }
            throw new RuntimeException("么有找到对应的枚举");
        }
    }
    public interface  AlipayCallback{
        String TRADE_STATUS_WAIT_BUYER_PAY = "WAIT_BUYER_PAY";
        String TRADE_STATUS_TRADE_SUCCESS = "TRADE_SUCCESS";

        String RESPONSE_SUCCESS = "success";
        String RESPONSE_FAILED = "failed";
    }



    public enum PayPlatformEnum{
        ALIPAY(1,"支付宝");

        PayPlatformEnum(int code,String value){
            this.code = code;
            this.value = value;
        }
        private String value;
        private int code;

        public String getValue() {
            return value;
        }

        public int getCode() {
            return code;
        }
    }

    public enum PaymentTypeEnum{
        ONLINE_PAY(1,"在线支付");

        PaymentTypeEnum(int code,String value){
            this.code = code;
            this.value = value;
        }
        private String value;
        private int code;

        public String getValue() {
            return value;
        }

        public int getCode() {
            return code;
        }


        public static PaymentTypeEnum codeOf(int code){
            for(PaymentTypeEnum paymentTypeEnum : values()){
                if(paymentTypeEnum.getCode() == code){
                    return paymentTypeEnum;
                }
            }
            throw new RuntimeException("么有找到对应的枚举");
        }

    }




}

ResponseCode：

package com.mmall.common;

/**
 * Created by geely
 */
public enum ResponseCode {

    SUCCESS(0,"SUCCESS"),
    ERROR(1,"ERROR"),
    NEED_LOGIN(10,"NEED_LOGIN"),
    ILLEGAL_ARGUMENT(2,"ILLEGAL_ARGUMENT");

    private final int code;
    private final String desc;


    ResponseCode(int code,String desc){
        this.code = code;
        this.desc = desc;
    }

    public int getCode(){
        return code;
    }
    public String getDesc(){
        return desc;
    }

}

ServerResponse：

package com.mmall.common;

import org.codehaus.jackson.annotate.JsonIgnore;
import org.codehaus.jackson.map.annotate.JsonSerialize;

import java.io.Serializable;

/**
 * Created by geely
 */
@JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL)
//保证序列化json的时候,如果是null的对象,key也会消失
public class ServerResponse<T> implements Serializable {

    private int status;
    private String msg;
    private T data;

    private ServerResponse(int status) {
        this.status = status;
    }

    private ServerResponse(int status, T data) {
        this.status = status;
        this.data = data;
    }

    private ServerResponse(int status, String msg, T data) {
        this.status = status;
        this.msg = msg;
        this.data = data;
    }

    private ServerResponse(int status, String msg) {
        this.status = status;
        this.msg = msg;
    }

    @JsonIgnore
    //使之不在json序列化结果当中
    public boolean isSuccess() {
        return this.status == ResponseCode.SUCCESS.getCode();
    }

    public int getStatus() {
        return status;
    }

    public T getData() {
        return data;
    }

    public String getMsg() {
        return msg;
    }


    public static <T> ServerResponse<T> createBySuccess() {
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode());
    }

    public static <T> ServerResponse<T> createBySuccessMessage(String msg) {
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(), msg);
    }

    public static <T> ServerResponse<T> createBySuccess(T data) {
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(), data);
    }

    public static <T> ServerResponse<T> createBySuccess(String msg, T data) {
        return new ServerResponse<T>(ResponseCode.SUCCESS.getCode(), msg, data);
    }


    public static <T> ServerResponse<T> createByError() {
        return new ServerResponse<T>(ResponseCode.ERROR.getCode(), ResponseCode.ERROR.getDesc());
    }


    public static <T> ServerResponse<T> createByErrorMessage(String errorMessage) {
        return new ServerResponse<T>(ResponseCode.ERROR.getCode(), errorMessage);
    }

    public static <T> ServerResponse<T> createByErrorCodeMessage(int errorCode, String errorMessage) {
        return new ServerResponse<T>(errorCode, errorMessage);
    }


}

TokenCache：

package com.mmall.common;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.TimeUnit;

/**
 * Created by geely
 */
public class TokenCache {

    private static Logger logger = LoggerFactory.getLogger(TokenCache.class);

    public static final String TOKEN_PREFIX = "token_";

    //LRU算法
    private static LoadingCache<String,String> localCache = CacheBuilder.newBuilder().initialCapacity(1000).maximumSize(10000).expireAfterAccess(12, TimeUnit.HOURS)
            .build(new CacheLoader<String, String>() {
                //默认的数据加载实现,当调用get取值的时候,如果key没有对应的值,就调用这个方法进行加载.
                @Override
                public String load(String s) throws Exception {
                    return "null";
                }
            });

    public static void setKey(String key,String value){
        localCache.put(key,value);
    }

    public static String getKey(String key){
        String value = null;
        try {
            value = localCache.get(key);
            if("null".equals(value)){
                return null;
            }
            return value;
        }catch (Exception e){
            logger.error("localCache get error",e);
        }
        return null;
    }
}

UserController：

package com.mmall.controller.portal;

import com.mmall.common.Const;
import com.mmall.common.ResponseCode;
import com.mmall.common.ServerResponse;
import com.mmall.pojo.User;
import com.mmall.service.IUserService;
import com.sun.corba.se.spi.activation.Server;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpSession;

/**
 * Created by geely
 */
@Controller
@RequestMapping("/user/")
public class UserController {


    @Autowired
    private IUserService iUserService;


    /**
     * 用户登录
     *
     * @param username
     * @param password
     * @param session
     * @return
     */
    @RequestMapping(value = "login.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<User> login(String username, String password, HttpSession session) {
        ServerResponse<User> response = iUserService.login(username, password);
        if (response.isSuccess()) {
            session.setAttribute(Const.CURRENT_USER, response.getData());
        }
        return response;
    }

    @RequestMapping(value = "logout.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<String> logout(HttpSession session) {
        session.removeAttribute(Const.CURRENT_USER);
        return ServerResponse.createBySuccess();
    }

    @RequestMapping(value = "register.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<String> register(User user) {
        return iUserService.register(user);
    }


    @RequestMapping(value = "check_valid.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<String> checkValid(String str, String type) {
        return iUserService.checkValid(str, type);
    }


    @RequestMapping(value = "get_user_info.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<User> getUserInfo(HttpSession session) {
        User user = (User) session.getAttribute(Const.CURRENT_USER);
        if (user != null) {
            return ServerResponse.createBySuccess(user);
        }
        return ServerResponse.createByErrorMessage("用户未登录,无法获取当前用户的信息");
    }


    @RequestMapping(value = "forget_get_question.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<String> forgetGetQuestion(String username) {
        return iUserService.selectQuestion(username);
    }


    @RequestMapping(value = "forget_check_answer.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<String> forgetCheckAnswer(String username, String question, String answer) {
        return iUserService.checkAnswer(username, question, answer);
    }


    @RequestMapping(value = "forget_reset_password.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<String> forgetRestPassword(String username, String passwordNew, String forgetToken) {
        return iUserService.forgetResetPassword(username, passwordNew, forgetToken);
    }


    @RequestMapping(value = "reset_password.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<String> resetPassword(HttpSession session, String passwordOld, String passwordNew) {
        User user = (User) session.getAttribute(Const.CURRENT_USER);
        if (user == null) {
            return ServerResponse.createByErrorMessage("用户未登录");
        }
        return iUserService.resetPassword(passwordOld, passwordNew, user);
    }


    @RequestMapping(value = "update_information.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<User> update_information(HttpSession session, User user) {
        User currentUser = (User) session.getAttribute(Const.CURRENT_USER);
        if (currentUser == null) {
            return ServerResponse.createByErrorMessage("用户未登录");
        }
        user.setId(currentUser.getId());
        user.setUsername(currentUser.getUsername());
        ServerResponse<User> response = iUserService.updateInformation(user);
        if (response.isSuccess()) {
            response.getData().setUsername(currentUser.getUsername());
            session.setAttribute(Const.CURRENT_USER, response.getData());
        }
        return response;
    }

    @RequestMapping(value = "get_information.do", method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<User> get_information(HttpSession session) {
        User currentUser = (User) session.getAttribute(Const.CURRENT_USER);
        if (currentUser == null) {
            return ServerResponse.createByErrorCodeMessage(ResponseCode.NEED_LOGIN.getCode(), "未登录,需要强制登录status=10");
        }
        return iUserService.getInformation(currentUser.getId());
    }


}

UserMapper：

package com.mmall.dao;

import com.mmall.pojo.User;
import org.apache.ibatis.annotations.Param;

public interface UserMapper {
    int deleteByPrimaryKey(Integer id);

    int insert(User record);

    int insertSelective(User record);

    User selectByPrimaryKey(Integer id);

    int updateByPrimaryKeySelective(User record);

    int updateByPrimaryKey(User record);

    int checkUsername(String username);

    int checkEmail(String email);

    User selectLogin(@Param("username") String username, @Param("password") String password);

    String selectQuestionByUsername(String username);

    int checkAnswer(@Param("username") String username, @Param("question") String question, @Param("answer") String answer);

    int updatePasswordByUsername(@Param("username") String username, @Param("passwordNew") String passwordNew);

    int checkPassword(@Param(value = "password") String password, @Param("userId") Integer userId);

    int checkEmailByUserId(@Param(value = "email") String email, @Param(value = "userId") Integer userId);
}

UserServiceImpl：

package com.mmall.service.impl;

import com.mmall.common.Const;
import com.mmall.common.ServerResponse;
import com.mmall.common.TokenCache;
import com.mmall.dao.UserMapper;
import com.mmall.pojo.User;
import com.mmall.service.IUserService;
import com.mmall.util.MD5Util;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.UUID;

/**
 * Created by geely
 */
@Service("iUserService")
public class UserServiceImpl implements IUserService {

    @Autowired
    private UserMapper userMapper;


    @Override
    public ServerResponse<User> login(String username, String password) {
        int resultCount = userMapper.checkUsername(username);
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("用户名不存在");
        }

        String md5Password = MD5Util.MD5EncodeUtf8(password);
        User user = userMapper.selectLogin(username, md5Password);
        if (user == null) {
            return ServerResponse.createByErrorMessage("密码错误");
        }

        user.setPassword(org.apache.commons.lang3.StringUtils.EMPTY);
        return ServerResponse.createBySuccess("登录成功", user);
    }


    public ServerResponse<String> register(User user) {
        ServerResponse validResponse = this.checkValid(user.getUsername(), Const.USERNAME);
        if (!validResponse.isSuccess()) {
            return validResponse;
        }
        validResponse = this.checkValid(user.getEmail(), Const.EMAIL);
        if (!validResponse.isSuccess()) {
            return validResponse;
        }
        user.setRole(Const.Role.ROLE_CUSTOMER);
        //MD5加密
        user.setPassword(MD5Util.MD5EncodeUtf8(user.getPassword()));
        int resultCount = userMapper.insert(user);
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("注册失败");
        }
        return ServerResponse.createBySuccessMessage("注册成功");
    }

    public ServerResponse<String> checkValid(String str, String type) {
        if (org.apache.commons.lang3.StringUtils.isNotBlank(type)) {
            //开始校验
            if (Const.USERNAME.equals(type)) {
                int resultCount = userMapper.checkUsername(str);
                if (resultCount > 0) {
                    return ServerResponse.createByErrorMessage("用户名已存在");
                }
            }
            if (Const.EMAIL.equals(type)) {
                int resultCount = userMapper.checkEmail(str);
                if (resultCount > 0) {
                    return ServerResponse.createByErrorMessage("email已存在");
                }
            }
        } else {
            return ServerResponse.createByErrorMessage("参数错误");
        }
        return ServerResponse.createBySuccessMessage("校验成功");
    }

    public ServerResponse selectQuestion(String username) {

        ServerResponse validResponse = this.checkValid(username, Const.USERNAME);
        if (validResponse.isSuccess()) {
            //用户不存在
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String question = userMapper.selectQuestionByUsername(username);
        if (org.apache.commons.lang3.StringUtils.isNotBlank(question)) {
            return ServerResponse.createBySuccess(question);
        }
        return ServerResponse.createByErrorMessage("找回密码的问题是空的");
    }

    public ServerResponse<String> checkAnswer(String username, String question, String answer) {
        int resultCount = userMapper.checkAnswer(username, question, answer);
        if (resultCount > 0) {
            //说明问题及问题答案是这个用户的,并且是正确的
            String forgetToken = UUID.randomUUID().toString();
            TokenCache.setKey(TokenCache.TOKEN_PREFIX + username, forgetToken);
            return ServerResponse.createBySuccess(forgetToken);
        }
        return ServerResponse.createByErrorMessage("问题的答案错误");
    }


    public ServerResponse<String> forgetResetPassword(String username, String passwordNew, String forgetToken) {
        if (org.apache.commons.lang3.StringUtils.isBlank(forgetToken)) {
            return ServerResponse.createByErrorMessage("参数错误,token需要传递");
        }
        ServerResponse validResponse = this.checkValid(username, Const.USERNAME);
        if (validResponse.isSuccess()) {
            //用户不存在
            return ServerResponse.createByErrorMessage("用户不存在");
        }
        String token = TokenCache.getKey(TokenCache.TOKEN_PREFIX + username);
        if (org.apache.commons.lang3.StringUtils.isBlank(token)) {
            return ServerResponse.createByErrorMessage("token无效或者过期");
        }

        if (org.apache.commons.lang3.StringUtils.equals(forgetToken, token)) {
            String md5Password = MD5Util.MD5EncodeUtf8(passwordNew);
            int rowCount = userMapper.updatePasswordByUsername(username, md5Password);

            if (rowCount > 0) {
                return ServerResponse.createBySuccessMessage("修改密码成功");
            }
        } else {
            return ServerResponse.createByErrorMessage("token错误,请重新获取重置密码的token");
        }
        return ServerResponse.createByErrorMessage("修改密码失败");
    }


    public ServerResponse<String> resetPassword(String passwordOld, String passwordNew, User user) {
        //防止横向越权,要校验一下这个用户的旧密码,一定要指定是这个用户.因为我们会查询一个count(1),如果不指定id,那么结果就是true啦count>0;
        int resultCount = userMapper.checkPassword(MD5Util.MD5EncodeUtf8(passwordOld), user.getId());
        if (resultCount == 0) {
            return ServerResponse.createByErrorMessage("旧密码错误");
        }

        user.setPassword(MD5Util.MD5EncodeUtf8(passwordNew));
        int updateCount = userMapper.updateByPrimaryKeySelective(user);
        if (updateCount > 0) {
            return ServerResponse.createBySuccessMessage("密码更新成功");
        }
        return ServerResponse.createByErrorMessage("密码更新失败");
    }


    public ServerResponse<User> updateInformation(User user) {
        //username是不能被更新的
        //email也要进行一个校验,校验新的email是不是已经存在,并且存在的email如果相同的话,不能是我们当前的这个用户的.
        int resultCount = userMapper.checkEmailByUserId(user.getEmail(), user.getId());
        if (resultCount > 0) {
            return ServerResponse.createByErrorMessage("email已存在,请更换email再尝试更新");
        }
        User updateUser = new User();
        updateUser.setId(user.getId());
        updateUser.setEmail(user.getEmail());
        updateUser.setPhone(user.getPhone());
        updateUser.setQuestion(user.getQuestion());
        updateUser.setAnswer(user.getAnswer());

        int updateCount = userMapper.updateByPrimaryKeySelective(updateUser);
        if (updateCount > 0) {
            return ServerResponse.createBySuccess("更新个人信息成功", updateUser);
        }
        return ServerResponse.createByErrorMessage("更新个人信息失败");
    }


    public ServerResponse<User> getInformation(Integer userId) {
        User user = userMapper.selectByPrimaryKey(userId);
        if (user == null) {
            return ServerResponse.createByErrorMessage("找不到当前用户");
        }
        user.setPassword(org.apache.commons.lang3.StringUtils.EMPTY);
        return ServerResponse.createBySuccess(user);

    }


    //backend

    /**
     * 校验是否是管理员
     *
     * @param user
     * @return
     */
    public ServerResponse checkAdminRole(User user) {
        if (user != null && user.getRole().intValue() == Const.Role.ROLE_ADMIN) {
            return ServerResponse.createBySuccess();
        }
        return ServerResponse.createByError();
    }


}

IUserService：

package com.mmall.service;

import com.mmall.common.ServerResponse;
import com.mmall.pojo.User;

/**
 * Created by geely
 */
public interface IUserService {

    ServerResponse<User> login(String username, String password);

    ServerResponse<String> register(User user);

    ServerResponse<String> checkValid(String str, String type);

    ServerResponse selectQuestion(String username);

    ServerResponse<String> checkAnswer(String username, String question, String answer);

    ServerResponse<String> forgetResetPassword(String username, String passwordNew, String forgetToken);

    ServerResponse<String> resetPassword(String passwordOld, String passwordNew, User user);

    ServerResponse<User> updateInformation(User user);

    ServerResponse<User> getInformation(Integer userId);

    ServerResponse checkAdminRole(User user);
}

MD5Util：

package com.mmall.util;

import org.springframework.util.StringUtils;

import java.security.MessageDigest;

/**
 * Created by geely
 */
public class MD5Util {

    private static String byteArrayToHexString(byte b[]) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++)
            resultSb.append(byteToHexString(b[i]));

        return resultSb.toString();
    }

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n += 256;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    /**
     * 返回大写MD5
     *
     * @param origin
     * @param charsetname
     * @return
     */
    private static String MD5Encode(String origin, String charsetname) {
        String resultString = null;
        try {
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            if (charsetname == null || "".equals(charsetname))
                resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
            else
                resultString = byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));
        } catch (Exception exception) {
        }
        return resultString.toUpperCase();
    }

    public static String MD5EncodeUtf8(String origin) {
        origin = origin + PropertiesUtil.getProperty("password.salt", "");
        return MD5Encode(origin, "utf-8");
    }


    private static final String hexDigits[] = {"0", "1", "2", "3", "4", "5",
            "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};

}

PropertiesUtil：

package com.mmall.util;

import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Properties;

/**
 * Created by geely
 */
public class PropertiesUtil {

    private static Logger logger = LoggerFactory.getLogger(PropertiesUtil.class);

    private static Properties props;

    static {
        String fileName = "mmall.properties";
        props = new Properties();
        try {
            props.load(new InputStreamReader(PropertiesUtil.class.getClassLoader().getResourceAsStream(fileName),"UTF-8"));
        } catch (IOException e) {
            logger.error("配置文件读取异常",e);
        }
    }

    public static String getProperty(String key){
        String value = props.getProperty(key.trim());
        if(StringUtils.isBlank(value)){
            return null;
        }
        return value.trim();
    }

    public static String getProperty(String key,String defaultValue){

        String value = props.getProperty(key.trim());
        if(StringUtils.isBlank(value)){
            value = defaultValue;
        }
        return value.trim();
    }



}

 mmall.properties:

ftp.server.ip=192.168.80.130
ftp.user=ftpuser
ftp.pass=ftpuser
ftp.server.http.prefix=http://img.happymmall.com/

password.salt = ouyan12433rewfdsc3sad!@#$%

UserManageController:

package com.mmall.controller.backend;

import com.mmall.common.Const;
import com.mmall.common.ServerResponse;
import com.mmall.pojo.User;
import com.mmall.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpSession;

/**
 * Created by geely
 */

@Controller
@RequestMapping("/manage/user")
public class UserManageController {

    @Autowired
    private IUserService iUserService;

    @RequestMapping(value="login.do",method = RequestMethod.POST)
    @ResponseBody
    public ServerResponse<User> login(String username, String password, HttpSession session){
        ServerResponse<User> response = iUserService.login(username,password);
        if(response.isSuccess()){
            User user = response.getData();
            if(user.getRole() == Const.Role.ROLE_ADMIN){
                //说明登录的是管理员
                session.setAttribute(Const.CURRENT_USER,user);
                return response;
            }else{
                return ServerResponse.createByErrorMessage("不是管理员,无法登录");
            }
        }
        return response;
    }

}