TFM-4.3-Reloaded/src/main/java/me/StevenLawson/TotalFreedomMod/commands/Command_radar.java

package me.StevenLawson.TotalFreedomMod.commands;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import org.bukkit.ChatColor;
import org.bukkit.Location;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

@CommandPermissions(level = AdminLevel.ALL, source = SourceType.ONLY_IN_GAME)
public class Command_radar extends FreedomCommand {

	@Override
	public boolean run(CommandSender sender, org.bukkit.entity.Player sender_p, Command cmd,
		String commandLabel, String[] args, boolean senderIsConsole) {
		Location sender_pos = sender_p.getLocation();

		List<TFM_RadarData> radar_data = new ArrayList<TFM_RadarData>();

		for (Player player : sender_pos.getWorld().getPlayers()) {
			if (!player.equals(sender_p)) {
				try {
					radar_data.add(
						new TFM_RadarData(player, sender_pos.distance(player.getLocation()),
							player.getLocation()));
				} catch (IllegalArgumentException ex) {
				}
			}
		}

		if (radar_data.isEmpty()) {
			playerMsg(sender,
				"You are the only player in this world. (" + ChatColor.GREEN + "Forever alone..."
					+ ChatColor.YELLOW + ")", ChatColor.YELLOW); //lol
			return true;
		}

		Collections.sort(radar_data, new TFM_RadarData());

		playerMsg(sender, "People nearby in " + sender_pos.getWorld().getName() + ":",
			ChatColor.YELLOW);

		int countmax = 5;
		if (args.length == 1) {
			try {
				countmax = Math.max(1, Math.min(64, Integer.parseInt(args[0])));
			} catch (NumberFormatException nfex) {
			}
		}

		for (TFM_RadarData i : radar_data) {
			playerMsg(sender, String.format("%s - %d",
				i.player.getName(),
				Math.round(i.distance)), ChatColor.YELLOW);

			if (--countmax <= 0) {
				break;
			}
		}

		return true;
	}

	private class TFM_RadarData implements Comparator<TFM_RadarData> {

		public Player player;
		public double distance;
		public Location location;

		public TFM_RadarData(Player player, double distance, Location location) {
			this.player = player;
			this.distance = distance;
			this.location = location;
		}

		public TFM_RadarData() {
		}

		@Override
		public int compare(TFM_RadarData t1, TFM_RadarData t2) {
			if (t1.distance > t2.distance) {
				return 1;
			} else if (t1.distance < t2.distance) {
				return -1;
			} else {
				return 0;
			}
		}
	}
}