package com.antidote.antifreecam.detection; import com.antidote.antifreecam.AntiFreeCam; import lombok.Getter; import org.bukkit.entity.Player; import org.bukkit.plugin.messaging.PluginMessageListener; import java.nio.charset.StandardCharsets; import java.util.HashMap; import java.util.HashSet; import java.util.Map; import java.util.Set; import java.util.UUID; @Getter public class FreeCamDetector implements PluginMessageListener { private final AntiFreeCam plugin; private final Map> playerMods; public FreeCamDetector(AntiFreeCam plugin) { this.plugin = plugin; this.playerMods = new HashMap<>(); } @Override public void onPluginMessageReceived(String channel, Player player, byte[] message) { if (player == null) { return; } UUID playerId = player.getUniqueId(); if (plugin.getConfigManager().isLogChecks()) { plugin.getLogger().info("Received plugin message from " + player.getName() + " on channel: " + channel + " (length: " + message.length + " bytes)"); } Set mods = playerMods.computeIfAbsent(playerId, k -> new HashSet<>()); try { String data = new String(message, StandardCharsets.UTF_8); if (plugin.getConfigManager().isLogChecks() && !data.isEmpty()) { plugin.getLogger().info("Message content: " + (data.length() > 100 ? data.substring(0, 100) + "..." : data)); } if (channel.contains("forge") || channel.contains("fml")) { parseForgeMessage(player, data, mods); } else if (channel.contains("fabric")) { parseFabricMessage(player, data, mods); } else if (channel.equals("minecraft:brand")) { if (plugin.getConfigManager().isLogChecks()) { plugin.getLogger().info("Client brand for " + player.getName() + ": " + data); } parseRegisterMessage(player, data, mods); } checkForBlockedMods(player, mods); } catch (Exception e) { if (plugin.getConfigManager().isLogChecks()) { plugin.getLogger().warning("Error parsing plugin message: " + e.getMessage()); e.printStackTrace(); } } } private void parseForgeMessage(Player player, String data, Set mods) { String lowerData = data.toLowerCase(); for (String blockedMod : plugin.getConfigManager().getBlockedMods()) { if (lowerData.contains(blockedMod)) { mods.add(blockedMod); if (plugin.getConfigManager().isLogChecks()) { plugin.getLogger().info("Detected mod '" + blockedMod + "' in Forge data for " + player.getName()); } } } } private void parseFabricMessage(Player player, String data, Set mods) { String lowerData = data.toLowerCase(); for (String blockedMod : plugin.getConfigManager().getBlockedMods()) { if (lowerData.contains(blockedMod)) { mods.add(blockedMod); if (plugin.getConfigManager().isLogChecks()) { plugin.getLogger().info("Detected mod '" + blockedMod + "' in Fabric data for " + player.getName()); } } } } private void parseRegisterMessage(Player player, String data, Set mods) { String lowerData = data.toLowerCase(); for (String blockedMod : plugin.getConfigManager().getBlockedMods()) { if (lowerData.contains(blockedMod)) { mods.add(blockedMod); if (plugin.getConfigManager().isLogChecks()) { plugin.getLogger().info("Detected mod '" + blockedMod + "' in register data for " + player.getName()); } } } } private void checkForBlockedMods(Player player, Set mods) { for (String mod : mods) { if (plugin.getConfigManager().isBlockedMod(mod)) { handleDetection(player, mod, "Plugin Message Channel"); return; } } } public void handleDetection(Player player, String modId, String detectionMethod) { if (player.hasPermission("antifreecam.bypass")) { if (plugin.getConfigManager().isLogChecks()) { plugin.getLogger().info("Player " + player.getName() + " has FreeCam but bypassed with permission."); } return; } if (plugin.getConfigManager().isLogDetections()) { plugin.getLogger().warning("FreeCam detected for " + player.getName() + " (Mod: " + modId + ", Method: " + detectionMethod + ")"); } plugin.logDetection(player.getName(), modId, detectionMethod); if (plugin.getConfigManager().isNotifyStaff()) { notifyStaff(player); } if (plugin.getConfigManager().isBanOnDetection()) { banPlayer(player); } else { kickPlayer(player); } } private void kickPlayer(Player player) { String kickMessage = plugin.getConfigManager().getKickMessage(); player.kickPlayer(kickMessage); } private void banPlayer(Player player) { plugin.getServer().dispatchCommand( plugin.getServer().getConsoleSender(), "ban " + player.getName() + " " + plugin.getConfigManager().getBanReason() ); } private void notifyStaff(Player player) { String alert = plugin.getConfigManager().formatMessage( plugin.getConfigManager().getDetectionAlert(), player.getName() ); plugin.getServer().getOnlinePlayers().stream() .filter(p -> p.hasPermission("antifreecam.notify")) .forEach(p -> p.sendMessage(alert)); } public boolean hasFreeCam(Player player) { Set mods = playerMods.get(player.getUniqueId()); if (mods == null || mods.isEmpty()) { return false; } return mods.stream().anyMatch(mod -> plugin.getConfigManager().isBlockedMod(mod)); } public void removePlayer(UUID playerId) { playerMods.remove(playerId); } }