KillstreakBroadcast

package net.ExtremeMC.KillstreakBroadcast;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.PlayerDeathEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerQuitEvent;
import org.bukkit.plugin.java.JavaPlugin;

public class KillstreakBroadcast extends JavaPlugin implements Listener{
    public Map<String, Integer> killstreaks = new HashMap<String, Integer>();

    public void onDisable() {
        killstreaks.clear();
        getLogger().info("KillstreakBroadcast has been disabled!");
    }

    public void onEnable() {
        this.saveDefaultConfig();
        getServer().getPluginManager().registerEvents(this, this);
        getLogger().info("KillstreakBroadcast has been enabled!");
        for (Player player : Bukkit.getOnlinePlayers()) {
            killstreaks.put(player.getDisplayName(), 0);
        }
    }

    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent event) {
        killstreaks.put(event.getPlayer().getDisplayName(), 0);
    }

    @EventHandler
    public void onPlayerLeave(PlayerQuitEvent event) {
        killstreaks.remove(event.getPlayer().getDisplayName());
    }

    @EventHandler
    public void onPlayerKilled(PlayerDeathEvent event) {
        String prefix = getConfig().getString("prefix") + " ";
        prefix = ChatColor.translateAlternateColorCodes('&', prefix);
        @SuppressWarnings("unchecked")
        List<Integer> ks = (List<Integer>) getConfig().getList("killstreaks");
        String message;
        String killstreakstring;

        String killer = event.getEntity().getKiller().getDisplayName();
        String killed = event.getEntity().getDisplayName();
        Player killedplayer = event.getEntity();
        Player killerplayer = event.getEntity().getKiller();

        boolean usexpbar = getConfig().getBoolean("usexpbar");
        if (killerplayer.hasPermission("killstreak.use")) {
            int oldkillstreak = killstreaks.get(killed);
            killstreaks.put(killed, 0);

            if (ks.contains(oldkillstreak)){
                killstreakstring = String.valueOf(oldkillstreak);
                message = prefix + getConfig().getString("messagekillstreakbroken");
                message = ChatColor.translateAlternateColorCodes('&', message);
                message = message.replaceAll("-playerbreaker-", killer);
                message = message.replaceAll("-playerbroken-", killed);
                message = message.replaceAll("-killstreak-", killstreakstring);
            }

            int current = killstreaks.get(killer);
            current ++;
            killstreaks.put(killer,  current);

            if (usexpbar) {
                killedplayer.setExp(0);
                killerplayer.setExp(0);
                killerplayer.setLevel(current);
            }

            if (ks.contains(current)) {
                killstreakstring = String.valueOf(current);
                message = ChatColor.GOLD + prefix + getConfig().getString("messagenewkillstreak");
                message = ChatColor.translateAlternateColorCodes('&', message);
                message = message.replaceAll("-player-", killer);
                message = message.replaceAll("-killstreak-", killstreakstring);
                Bukkit.broadcastMessage(message);

            }
        }

    }

    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        String prefix = getConfig().getString("prefix");
        prefix = ChatColor.translateAlternateColorCodes('&', prefix);
        if (cmd.getName().equalsIgnoreCase("kb")) {
            if (args.length == 0) {
                sender.sendMessage(prefix + " Not enough arguments!");
                return true;
            } else if (args.length > 1) {
                sender.sendMessage(prefix + " Too many arguments!");
                return true;
            } else {
                if (args[0].equalsIgnoreCase("reset")) {
                    if (sender.hasPermission("killstreak.reset") || sender.hasPermission("killstreak.*")) {
                        Bukkit.broadcastMessage(prefix + " Killstreaks have been reset!");
                        killstreaks.clear();
                        for (Player player : Bukkit.getOnlinePlayers()) {
                            killstreaks.put(player.getDisplayName(), 0);
                        }
                        return true;
                    } else {
                        sender.sendMessage(prefix + " You dont have permission to do that!");
                        return true;
                    }
                } else if (args[0].equalsIgnoreCase("reload")) {
                    if (sender.hasPermission("killstreak.reload") || sender.hasPermission("killstreak.*")) {
                        getLogger().info("Plugin reload initiated.");
                        onDisable();
                        this.reloadConfig();
                        onEnable();
                        Bukkit.broadcastMessage(prefix + " Killstreaks have been reset!");
                        return true;
                    } else {
                        sender.sendMessage(prefix + " You dont have permission to do that!");
                        return true;
                    }
                } else {
                    sender.sendMessage(prefix + " Unknown command");
                    return true;
                }
            }
        }
        return false;
    }
}