PMCommand.java

package com.mrsans.pmlogger;

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

import java.util.HashMap;
import java.util.Map;
import java.util.UUID;

public class PMCommand implements CommandExecutor {

    // tracks who each player last messaged, for /r and /reply
    private static final Map<UUID, UUID> lastConversation = new HashMap<>();

    @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;
        String cmd = command.getName().toLowerCase();

        Player target;
        String message;

        if (cmd.equals("r") || cmd.equals("reply")) {
            UUID lastUuid = lastConversation.get(player.getUniqueId());
            if (lastUuid == null) {
                player.sendMessage(ChatColor.RED + "You have nobody to reply to.");
                return true;
            }
            target = Bukkit.getPlayer(lastUuid);
            if (target == null || !target.isOnline()) {
                player.sendMessage(ChatColor.RED + "That player is no longer online.");
                return true;
            }
            if (args.length < 1) {
                player.sendMessage(ChatColor.RED + "Usage: /" + label + " <message>");
                return true;
            }
            message = String.join(" ", args);
        } else {
            if (args.length < 2) {
                player.sendMessage(ChatColor.RED + "Usage: /" + label + " <player> <message>");
                return true;
            }
            target = Bukkit.getPlayer(args[0]);
            if (target == null || !target.isOnline()) {
                player.sendMessage(ChatColor.RED + "That player is not online.");
                return true;
            }
            if (target.getUniqueId().equals(player.getUniqueId())) {
                player.sendMessage(ChatColor.RED + "You cannot message yourself.");
                return true;
            }
            StringBuilder sb = new StringBuilder();
            for (int i = 1; i < args.length; i++) {
                if (i > 1) sb.append(" ");
                sb.append(args[i]);
            }
            message = sb.toString();
        }

        // Send in vanilla-style formatting
        player.sendMessage(ChatColor.GRAY + "" + ChatColor.ITALIC + "[me -> " + target.getName() + "] " + ChatColor.RESET + message);
        target.sendMessage(ChatColor.GRAY + "" + ChatColor.ITALIC + "[" + player.getName() + " -> me] " + ChatColor.RESET + message);

        // Track conversation both ways so either side can /r
        lastConversation.put(player.getUniqueId(), target.getUniqueId());
        lastConversation.put(target.getUniqueId(), player.getUniqueId());

        // Log it
        PMLoggerPlugin.getInstance().logMessage(player.getName(), target.getName(), message);

        // Deliver to spies (excluding the two people already in the conversation)
        String spyLine = ChatColor.DARK_GRAY + "[PM] " + player.getName() + " -> " + target.getName() + ": " + ChatColor.GRAY + message;
        for (UUID spyId : PMLoggerPlugin.getInstance().getSpyPlayers()) {
            Player spy = Bukkit.getPlayer(spyId);
            if (spy != null && spy.isOnline()
                    && !spy.getUniqueId().equals(player.getUniqueId())
                    && !spy.getUniqueId().equals(target.getUniqueId())) {
                spy.sendMessage(spyLine);
            }
        }

        return true;
    }
}