//File:  User.java
//CS 471 - Operating Systems Project
//Dennis Pereira, Ely Soto, John Cavalieri

//The User class is used when an instance of a user is created.
//The user class also contains a subclass UserMsgBox that
//handles messaging between users.
//The user class also contains an array of the handles that this
//particular user controls.


import java.util.Vector;

public class User
{
    private String username;
    private Vector VMHandles = new Vector(5,1);
    private int handlecount = 0;
    public boolean isClosing = false;
    private String curpath;
    UserMsgBox usrmsgbox = new UserMsgBox();
    
    public User(String name)
    {
        username = name;
    }
    
    public void setcurrentPath(String newpath)
    {
        curpath = newpath;
    }
    
    public String getcurrentPath()
    {
        return curpath;
    }
    public String getName()
    {
        return username;
    }
    
    public synchronized void addHandle(Handle vmh)
    {
        int i;
        
        for(i=0;i < VMHandles.size() && ((Handle)VMHandles.get(i)).getID().compareTo(vmh.getID()) != 0;i++);
        
        if(i >= VMHandles.size())
        {
            VMHandles.add(vmh);
            handlecount++;
        }
    }
    
    public synchronized Object removeHandle(Handle vmh)
    {// Returns Removed object, if not found returns null
        int i = 0;
        try
        {
            for(i=0;((Handle)VMHandles.get(i)).getID() != vmh.getID();i++); //Matches Handle ID's
        }
        catch(ArrayIndexOutOfBoundsException ex)
        {
            return null;
        }
        handlecount--;
        return VMHandles.remove(i);
    }
    
    public int getCount()
    {
        return handlecount;
    }
    
    public Handle get(int index)
    {
        return ((Handle)VMHandles.get(index));
    }
    
    public void sendmsg(String msg)
    {
        usrmsgbox.newmsg(msg);
    }
    
    public String[] getmsgs()
    {
        return usrmsgbox.getmsgs(); 
    }
    
    class UserMsgBox
    {
        private Vector msgbox = new Vector(5,1);
        
        public UserMsgBox()
        {
        }
        
        void newmsg(String msg)
        {
            msgbox.add(msg);
        }
        
        String[] getmsgs()
        {
            String[] msgs = new String[msgbox.size()];
            for(int i = 0;i < msgs.length;i++)
            {
                msgs[i] = (String)msgbox.remove(0);
            }
            return msgs;
        }
    }
}