import java.io.*;
import java.net.*;
import java.util.*;
public class Work implements Runnable{
   List<User> users=new ArrayList<>();
   boolean running=true;
   public void writeToAll(String text){
	for(User userToWrite: users){
	  userToWrite.pw.println(text);
	}	   
   }
   public void add(User user){
	   synchronized(users){
		  users.add(user);
 		  writeToAll(user.toString());
	   }
   }
   public void run(){
	   while(running){
		   try{
			   Thread.sleep(500);
			   synchronized(users){
				   for(User user: users){
					   if(user.br.ready()){
						   while(user.br.ready()){
							   char c=(char)user.br.read();
							   if(c=='\n'){
								 user.execute(user.linepart);
								 writeToAll(user.toString());
                                 user.linepart="";								 
							   } else {
							     user.linepart+=c;
							   }
						   }
					   }
				   }
			   }
		   } catch(Exception e){e.printStackTrace();}
	   }
   }
}