mcMMO/hMod/vmc.java

import java.io.*;
import java.lang.String;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
public class vmc {
private static volatile vmc instance;     
protected static final Logger log = Logger.getLogger("Minecraft");
private PropertiesFile properties;
String location = "groups.txt";    
    //Check if two players are in the same party
    public static boolean inSameParty(Player playera, Player playerb){
        if(vUsers.getProfile(playera).getParty().equals(vUsers.getProfile(playerb).getParty())){
            return true;
        } else {
            return false;
        }
    }
    //Get the distance between two players
    public static double getDistance(Player player1, Player player2)
    {
    return Math.sqrt(Math.pow(player1.getX() - player2.getX(), 2) + Math.pow(player1.getY() - player2.getY(), 2)
    + Math.pow(player1.getZ() - player2.getZ(), 2));
    }
    //Send the "invisibility" toggle to players near the hidden player
    public static void sendInvisible(Player player){
        for (Player p : etc.getServer().getPlayerList())
                {
                    if (getDistance(player, p) <= vConfig.range && p.getUser() != player.getUser())
                    {
                    p.getUser().a.b(new dv(player.getUser().g));
                    }
                }
    }
    //Send "visibility" toggle to invisible players turning them back to normal
    public static void sendNotInvisible(Player player){
        for (Player p : etc.getServer().getPlayerList())
                {
                    if (getDistance(player, p) < vConfig.range && p.getUser() != player.getUser())
                    {
                    p.getUser().a.b(new d(player.getUser()));
                    }
                }
    }
    public String[] getPartyMembers(Player player){
        int x = 0;
        String partyarray[] = null;
         ArrayList<String> partymembers = new ArrayList<String>();
        for(Player p : etc.getServer().getPlayerList()){
                if(vmc.inSameParty(player, p) && p != null){
                partymembers.add(p.getName());
                x++;
                }
            }
        partymembers.toArray(partyarray);
        return partyarray;
    }
    public static void informPartyMembers(Player player){
        int x = 0;
        for(Player p : etc.getServer().getPlayerList()){
                if(vmc.inSameParty(player, p) && !p.getName().equals(player.getName())){
                p.sendMessage(vUsers.getProfile(player).getTag() + player.getName() + Colors.Green + " has joined your party");
                x++;
                }
            }
    }
    public static void informPartyMembersQuit(Player player){
        int x = 0;
        for(Player p : etc.getServer().getPlayerList()){
                if(vmc.inSameParty(player, p) && !p.getName().equals(player.getName())){
                p.sendMessage(vUsers.getProfile(player).getTag() + player.getName() + Colors.Green + " has left your party");
                x++;
                }
            }
    }
    public String getGroupPrefix(Player player){
        String groups[] = player.getGroups();
        String groupline[] = null;
        String prefix = Colors.White;
        int x = 0;
        if(groups.length == 0 || groups == null)
        return prefix;
        if(vConfig.getInstance().groupcoloredbrackets()){
        //Read the file
        properties = new PropertiesFile(location);
			try {
				properties.load();
			} catch (IOException e) {
				log.log(Level.SEVERE, "Exception while loading " + location, e);
			}
                        //Grab the line with the same group as the player
                        for(String herp : groups){
                            if(herp != null)
                            x++;
                        }
                        if(x > 0)
                        groupline = properties.getString(groups[0]).split(":");
                        //Check if the prefix is null or not
                        if(!groupline[0].isEmpty() && groupline != null)
                        {
                        //vChat.colorChange(groupline[0].charAt(0));
                        prefix = groupline[0];
                        prefix = vChat.colorChange(prefix.charAt(0));
                        }
        }
                        return prefix;
    }
    
    public static vmc getInstance() {
		if (instance == null) {
			instance = new vmc();
		}
		return instance;	
	}
}