Add "local" chat channels with proximity-based messaging

Introduced a "local" channel type to restrict chat visibility based on player proximity, configurable via `LOCAL_DISTANCE`. Added channel spy functionality to monitor "local" messages. Updated constructors and configuration to support this new feature.

api/src/main/java/com/alttd/chat/config/Config.java

@@ -368,6 +368,8 @@ public final class Config {
     public static String CUSTOM_CHANNEL_TOGGLED = "<yellow>Toggled <channel> <status>.</yellow>";
     public static Component TOGGLED_ON = null;
     public static Component TOGGLED_OFF = null;
+    public static double LOCAL_DISTANCE;
+    public static String CHANNEL_SPY = "<i><gray>SPY:</gray> <dark_gray>(<dark_gray><sender> → <channel>) <message></dark_gray>";
     private static void chatChannels() {
         ConfigurationNode node = getNode("chat-channels");
         if (node.empty()) {
@@ -383,12 +385,16 @@ public final class Config {
             new CustomChannel(channelName,
                     getString(key + "format", ""),
                     getList(key + "servers", Collections.EMPTY_LIST),
-                    getBoolean(key + "proxy", false));
+                    getBoolean(key + "proxy", false),
+                    getBoolean(key + "local", false)
+            );
         }
 
         CUSTOM_CHANNEL_TOGGLED = getString("chat-channels-messages.channel-toggled", CUSTOM_CHANNEL_TOGGLED);
         TOGGLED_ON = Utility.parseMiniMessage(getString("chat-channels-messages.channel-on", "<green>on</green><gray>"));
         TOGGLED_OFF = Utility.parseMiniMessage(getString("chat-channels-messages.channel-off", "<red>off</red><gray>"));
+        LOCAL_DISTANCE = getDouble("chat-channels-messages.local-distance", 200.0);
+        CHANNEL_SPY = getString("chat-channels-messages.spy", CHANNEL_SPY);
     }
 
     public static String SERVERMUTEPERMISSION = "chat.command.mute-server";

api/src/main/java/com/alttd/chat/objects/channels/Channel.java

@@ -10,12 +10,14 @@ public class Channel {
     protected String channelName;
     protected String format;
     protected boolean proxy;
+    protected boolean local;
 
-    public Channel(String channelName, String format, boolean proxy) {
+    public Channel(String channelName, String format, boolean proxy, boolean local) {
         this.permission = "chat.channel." + channelName.toLowerCase();
         this.channelName = channelName;
         this.format = format;
         this.proxy = proxy;
+        this.local = local;
         channels.put(channelName.toLowerCase(), this);
     }
 
@@ -39,6 +41,10 @@ public class Channel {
         return proxy;
     }
 
+    public boolean isLocal() {
+        return local;
+    }
+
     public static Channel getChatChannel(String channelName) {
         return channels.get(channelName.toLowerCase());
     }

api/src/main/java/com/alttd/chat/objects/channels/CustomChannel.java

@@ -5,8 +5,8 @@ import java.util.*;
 public class CustomChannel extends Channel {
     private final List<String> servers;
 
-    public CustomChannel(String channelName, String format, List<String> servers, boolean proxy) {
+    public CustomChannel(String channelName, String format, List<String> servers, boolean proxy, boolean local) {
-        super(channelName, format, proxy);
+        super(channelName, format, proxy, local);
         this.permission = "chat.channel." + channelName.toLowerCase();
         this.channelName = channelName;
         this.format = format;

api/src/main/java/com/alttd/chat/objects/channels/DefaultChannel.java

@@ -2,6 +2,6 @@ package com.alttd.chat.objects.channels;
 
 public abstract class DefaultChannel extends Channel{
     public DefaultChannel(String channelName, String format, boolean proxy) {
-        super(channelName, format, proxy);
+        super(channelName, format, proxy, false);
     }
 }

galaxy/src/main/java/com/alttd/chat/handler/ChatHandler.java

@@ -22,7 +22,9 @@ import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
 import net.kyori.adventure.text.minimessage.tag.resolver.TagResolver;
 import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
 import org.bukkit.Bukkit;
+import org.bukkit.Location;
 import org.bukkit.Material;
+import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 
@@ -188,9 +190,9 @@ public class ChatHandler {
         component = modifiableString.component();
 
         if (channel.isProxy()) {
-            sendChatChannelMessage(player, channel.getChannelName(), "chatchannel", component);
+            sendChatChannelMessage(player, channel.getChannelName(), "chatchannel", component, message);
         } else {
-            sendChatChannelMessage(channel, player.getUniqueId(), component);
+            sendChatChannelMessage(channel, player.getUniqueId(), component, message);
         }
     }
 
@@ -243,7 +245,7 @@ public class ChatHandler {
 //        }
     }
 
-    private void sendChatChannelMessage(CustomChannel chatChannel, UUID uuid, Component component) {
+    private void sendChatChannelMessage(CustomChannel chatChannel, UUID uuid, Component component, String message) {
         Player player = Bukkit.getPlayer(uuid);
         if (player == null) {
             ALogger.warn("Failed to send chat message from non existent player");
@@ -264,7 +266,28 @@ public class ChatHandler {
             stream = stream.filter(receiver -> !ChatUserManager.getChatUser(receiver.getUniqueId()).getIgnoredPlayers().contains(uuid)
                     || receiver.hasPermission("chat.ignorebypass"));
         }
-        stream.forEach(p -> p.sendMessage(component));
+        if (chatChannel.isLocal()) {
+            Location location = player.getLocation();
+            stream = stream.filter(receiver -> {
+                Player receiverPlayer = Bukkit.getPlayer(receiver.getUniqueId());
+                if (receiverPlayer == null)
+                    return false;
+                if (!location.getWorld().getUID().equals(receiverPlayer.getLocation().getWorld().getUID()))
+                    return false;
+                return !(receiverPlayer.getLocation().distance(location) > Config.LOCAL_DISTANCE);
+            });
+        }
+        List<? extends Player> recipientPlayers = stream.toList();
+        recipientPlayers.forEach(p -> p.sendMessage(component));
+
+        List<UUID> recipientUUIDs = recipientPlayers.stream().map(Entity::getUniqueId).toList();
+        Bukkit.getServer().getOnlinePlayers().stream()
+                .filter(onlinePlayer -> onlinePlayer.hasPermission(Config.SPYPERMISSION))
+                .filter(onlinePlayer -> !recipientUUIDs.contains(onlinePlayer.getUniqueId()))
+                .forEach(onlinePlayer -> onlinePlayer.sendRichMessage(Config.CHANNEL_SPY,
+                        Placeholder.component("sender", player.name()),
+                        Placeholder.parsed("channel", chatChannel.getChannelName()),
+                        Placeholder.parsed("message", message)));
     }
 
     private void sendPluginMessage(Player player, String channel, Component component) {
@@ -284,7 +307,7 @@ public class ChatHandler {
         player.sendPluginMessage(plugin, Config.MESSAGECHANNEL, out.toByteArray());
     }
 
-    public void sendChatChannelMessage(Player player, String chatChannelName, String channel, Component component) {
+    public void sendChatChannelMessage(Player player, String chatChannelName, String channel, Component component, String ignored) {
         ByteArrayDataOutput out = ByteStreams.newDataOutput();
         out.writeUTF(channel);
         out.writeUTF(chatChannelName);