PMSpyCommand.java

package com.mrsans.pmlogger;

import net.md_5.bungee.api.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import java.util.Set;
import java.util.UUID;

public class PMSpyCommand implements CommandExecutor {

    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        if (!(sender instanceof Player)) {
            sender.sendMessage("Only players can use this command.");
            return true;
        }

        Player player = (Player) sender;
        if (!player.hasPermission("pmlogger.spy")) {
            player.sendMessage(ChatColor.RED + "You don't have permission to do that.");
            return true;
        }

        Set<UUID> spies = PMLoggerPlugin.getInstance().getSpyPlayers();
        UUID id = player.getUniqueId();

        if (spies.contains(id)) {
            spies.remove(id);
            player.sendMessage(ChatColor.YELLOW + "PM spy mode disabled.");
        } else {
            spies.add(id);
            player.sendMessage(ChatColor.GREEN + "PM spy mode enabled - you will now see all private messages.");
        }

        return true;
    }
}