AntiSwear [Source Code Included]

package me.Kruciial.noswear;

import java.util.ArrayList;
import java.util.List;
import org.bukkit.ChatColor;
import org.bukkit.Server;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.AsyncPlayerChatEvent;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;

public class AntiSwear
  extends JavaPlugin
  implements Listener
{
  public void onEnable()
  {
    getServer().getPluginManager().registerEvents(this, this);
    saveDefaultConfig();
    if (getSwearWords() == null)
    {
      getConfig().set("swear-words", new ArrayList());
      saveConfig();
    }
  }

  public void onDisable() {}

  public List<String> getSwearWords()
  {
    return getConfig().getStringList("swear-words");
  }

  public String getCensorSymbol()
  {
    return getConfig().getString("censor-symbol");
  }

  public void setCensorSymbol(String symbol)
  {
    getConfig().set("censor-symbol", symbol);
    saveConfig();
  }

  public void saveSwearWord(String word)
  {
    List<String> swearWords = getSwearWords();
    if (!swearWords.contains(word.toLowerCase())) {
      swearWords.add(word.toLowerCase());
    }
    getConfig().set("swear-words", swearWords);
    saveConfig();
  }

  public void removeSwearWord(String word)
  {
    List<String> swearWords = getSwearWords();
    swearWords.remove(word.toLowerCase());
    getConfig().set("swear-words", swearWords);
    saveConfig();
  }

  public String censor(String string)
  {
    String censored = string;
    for (String swearWord : getSwearWords())
    {
      String censor = "";
      for (int i = 0; i < swearWord.length(); i++) {
        censor = censor + getCensorSymbol();
      }
      censored = censored.replaceAll("(?i)" + swearWord, censor);
    }
    return censored;
  }

  public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args)
  {
    if (cmd.getLabel().equalsIgnoreCase("filter")) {
      if ((args.length >= 1) && (args[0].equalsIgnoreCase("add")))
      {
        if (sender.hasPermission("filter.add"))
        {
          if (args.length == 1)
          {
            sender.sendMessage(ChatColor.RED + "Command Usage: /filter add <Swear Word>");
          }
          else
          {
            String word = "";
            for (int i = 1; i < args.length; i++) {
              word = word + args[i] + " ";
            }
            word = word.substring(0, word.length() - 1);
            saveSwearWord(word);
            sender.sendMessage(ChatColor.GREEN + "Added swear word \"" + word + "\".");
          }
        }
        else {
          sender.sendMessage(ChatColor.RED + "You do not have permission to run that command!");
        }
      }
      else
      {
        int i;
        if ((args.length >= 1) && (args[0].equalsIgnoreCase("remove")))
        {
          if (sender.hasPermission("filter.remove"))
          {
            if (args.length == 1)
            {
              sender.sendMessage(ChatColor.RED + "Command Usage: /filter remove <Swear Word>");
            }
            else
            {
              String word = "";
              for (i = 1; i < args.length; i++) {
                word = word + args[i] + " ";
              }
              word = word.substring(0, word.length() - 1);
              removeSwearWord(word);
              sender.sendMessage(ChatColor.GREEN + "Removed swear word \"" + word + "\".");
            }
          }
          else {
            sender.sendMessage(ChatColor.RED + "You do not have permission to run that command!");
          }
        }
        else if ((args.length >= 1) && (args[0].equalsIgnoreCase("list")))
        {
          if (sender.hasPermission("filter.list"))
          {
            if (args.length != 1)
            {
              sender.sendMessage(ChatColor.RED + "Command Usage: /filter list");
            }
            else
            {
              sender.sendMessage(ChatColor.GREEN + "Swear Words:");
              for (String word : getSwearWords()) {
                sender.sendMessage(ChatColor.GRAY + "- " + word);
              }
            }
          }
          else {
            sender.sendMessage(ChatColor.RED + "You do not have permission to run that command!");
          }
        }
        else {
          sender.sendMessage(ChatColor.RED + "Command Usage: /filter <add [Swear Word]|remove [Swear Word]|list>");
        }
      }
    }
    return true;
  }

  @EventHandler
  public void onPlayerChat(AsyncPlayerChatEvent evt)
  {
    if (!evt.getPlayer().hasPermission("filter.bypass")) {
      evt.setMessage(censor(evt.getMessage()));
    }
  }
}