package com.struts.usermgr.manager;

import java.sql.Connection;
import java.util.ArrayList;
import java.util.List;

import com.struts.usermgr.User.User;
import com.struts.usermgr.dao.UserDao;
import com.struts.usermgr.factory.UserDaoFactory;
import com.struts.usermgr.utils.DB;

public class UserManager {
	private static UserManager instance = new UserManager() ; 
	
	private UserDao userDao = null ;
	
	private UserManager(){
		userDao = UserDaoFactory.getInstance().createUserDao() ;
	}
	
	public static UserManager getInstance(){
		return instance  ;
	}
	
	public void addUser(User user){
	
		Connection conn = null ;
		try{
			conn = DB.getConnection() ;
		userDao.addUser(conn, user) ;
		}catch(Exception e) {
			e.printStackTrace();
		}finally {
			DB.closeConnection(conn);
		}
	}
	
	public User findUserById(String userId) {
		User user = null;
		try {
			user = userDao.findUserById(userId);
		}catch(Exception e) {
			e.printStackTrace();
		}
		return user;
	}
	
	public List findAllUserList() {
		List userList = new ArrayList();
		try {
			userList = userDao.findAllUserList();
		}catch(Exception e) {
			e.printStackTrace();
		}
		return userList;
	} 
	
	public void deleteUsers(String[] userIdList) {
		Connection conn = null;
		try {
			conn = DB.getConnection();
			userDao.deleteUsers(conn, userIdList);
		}catch(Exception e) {
			e.printStackTrace();
		}finally {
			DB.closeConnection(conn);
		}
	}
	
	public void modifyUser(User user) {
		Connection conn = null;
		try {
			conn = DB.getConnection();
			userDao.modifyUser(conn, user);
		}catch(Exception e) {
			e.printStackTrace();
		}finally {
			DB.closeConnection(conn);
		}
	}
}