import org.json.simple.JSONArray;

import org.json.simple.JSONObject;

import org.json.simple.parser.JSONParser;

import org.json.simple.parser.ParseException;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

/**

* Created by Ксения on 3/6/2016.

*/

public class JSONReadWriter {

private String fileName;

public JSONReadWriter (String fName)

{

fileName = fName;

}

public JSONArray readJSON()

{

JSONParser parser = new JSONParser();

JSONArray ulist = new JSONArray();

try {

JSONObject jsonObj = (JSONObject) parser.parse(new FileReader(fileName));

if (!jsonObj.isEmpty())

ulist = (JSONArray) jsonObj.get("u_list");

} catch (ParseException e) {

e.printStackTrace();

System.out.println("Can't parse the file");

} catch (IOException e) {

e.printStackTrace();

System.out.println("Can't read the file");

} catch (Exception e) {

e.printStackTrace();

}

return ulist;

}

public List<User> readUser()

{

List<User> userlist = new ArrayList<>();

String login;

String password;

JSONArray ulist = readJSON();

List<JSONObject> ulistObj = new ArrayList<>();

for(int i = 0; i< ulist.size(); i++) {

ulistObj.add(i, (JSONObject) ulist.get(i));

login = ulistObj.get(i).get("u_login").toString();

password = ulistObj.get(i).get("u_password").toString();

userlist.add(i, new User(login, password));

}

return userlist;

}

public void writeUser(User us) {

JSONArray ulist = readJSON();

JSONObject ob = new JSONObject();

ob.put("u_login", us.getLogin());

ob.put("u_password", us.getPassword());

ulist.add(ob);

JSONObject jo = new JSONObject();

jo.put("u_list", ulist);

try (FileWriter writer = new FileWriter(fileName)){

writer.write(jo.toJSONString());

writer.close();

} catch (IOException e) {

e.printStackTrace();

System.out.println("Can't write to the file");

}

}

public void rewriteUser(List<User> uslist) {

for (User us:uslist) {

writeUser(us);

}

}

}