custom chat format checker

to stop yfd impostering

src/main/java/land/chipmunk/chayapak/chomens_bot/Bot.java

@@ -78,6 +78,7 @@ public class Bot {
     public WorldPlugin world;
     public AuthPlugin auth;
     public ScreensharePlugin screenshare;
+    public FormatCheckerPlugin formatChecker;
 
     public Bot (Configuration.BotOption botOption, List<Bot> bots, Configuration config) {
         this.host = botOption.host;
@@ -127,6 +128,7 @@ public class Bot {
         this.world = new WorldPlugin(this);
         this.auth = new AuthPlugin(this);
 //        this.screenshare = new ScreensharePlugin(this);
+        this.formatChecker = new FormatCheckerPlugin(this);
 
         for (Listener listener : listeners) listener.loadedPlugins();
 

src/main/java/land/chipmunk/chayapak/chomens_bot/Configuration.java

@@ -27,14 +27,20 @@ public class Configuration {
     
     public String ownerName = "chayapak"; // mabe mabe
 
+    public ImposterFormatChecker imposterFormatChecker = new ImposterFormatChecker();
+
     public OwnerAuthentication ownerAuthentication = new OwnerAuthentication();
     
     public List<String> trusted = new ArrayList<>();
     public SelfCare selfCare = new SelfCare();
-    public Eval eval = new Eval();
 
     public BotOption[] bots = new BotOption[]{};
 
+    public static class ImposterFormatChecker {
+        public boolean enabled = false;
+        public String key;
+    }
+
     public static class OwnerAuthentication {
         public boolean enabled = false;
         public String key = "";
@@ -137,10 +143,6 @@ public class Configuration {
         public boolean username = true;
     }
 
-    public static class Eval {
-        public String address = "ws://localhost:3069";
-    }
-
     public static class BotOption {
         public String host;
         public int port;

src/main/java/land/chipmunk/chayapak/chomens_bot/plugins/AuthPlugin.java

@@ -34,8 +34,8 @@ public class AuthPlugin extends PlayersPlugin.Listener {
         bot.players.addListener(this);
         bot.chat.addListener(new ChatPlugin.Listener() {
             @Override
-            public void systemMessageReceived(Component component, boolean isCommandSuggestions, boolean isAuth, String string, String ansi) {
-                AuthPlugin.this.systemMessageReceived(component, isCommandSuggestions, isAuth);
+            public void systemMessageReceived(Component component, boolean isCommandSuggestions, boolean isAuth, boolean isImposterFormat, String string, String ansi) {
+                AuthPlugin.this.systemMessageReceived(component, isCommandSuggestions, isAuth, isImposterFormat);
             }
         });
         bot.executor.scheduleAtFixedRate(this::check, 0, 1, TimeUnit.SECONDS);
@@ -83,9 +83,9 @@ public class AuthPlugin extends PlayersPlugin.Listener {
         started = false;
     }
 
-    private void systemMessageReceived (Component component, boolean isCommandSuggestions, boolean isAuth) {
+    private void systemMessageReceived (Component component, boolean isCommandSuggestions, boolean isAuth, boolean isImposterFormat) {
         try {
-            if (isCommandSuggestions || !isAuth) return;
+            if (isCommandSuggestions || !isAuth || !isImposterFormat) return;
 
             final List<Component> children = component.children();
 

src/main/java/land/chipmunk/chayapak/chomens_bot/plugins/ChatPlugin.java

@@ -100,12 +100,14 @@ public class ChatPlugin extends Bot.Listener {
             else if (id.equals(bot.auth.id)) isAuth = true;
         }
 
+        final boolean isImposterFormat = bot.formatChecker.isImposterFormat(component);
+
         final String string = ComponentUtilities.stringify(component);
         final String ansi = ComponentUtilities.stringifyAnsi(component);
 
         for (Listener listener : listeners) {
-            if (!isCommandSuggestions && !isAuth) listener.systemMessageReceived(component, string, ansi);
-            listener.systemMessageReceived(component, isCommandSuggestions, isAuth, string, ansi);
+            if (!isCommandSuggestions && !isAuth && !isImposterFormat) listener.systemMessageReceived(component, string, ansi);
+            listener.systemMessageReceived(component, isCommandSuggestions, isAuth, isImposterFormat, string, ansi);
 
             if (playerMessage != null) listener.playerMessageReceived(playerMessage);
         }
@@ -365,6 +367,6 @@ public class ChatPlugin extends Bot.Listener {
     public static class Listener {
         public void playerMessageReceived (PlayerMessage message) {}
         public void systemMessageReceived (Component component, String string, String ansi) {}
-        public void systemMessageReceived (Component component, boolean isCommandSuggestions, boolean isAuth, String string, String ansi) {}
+        public void systemMessageReceived (Component component, boolean isCommandSuggestions, boolean isAuth, boolean isImposterFormat, String string, String ansi) {}
     }
 }

src/main/java/land/chipmunk/chayapak/chomens_bot/plugins/CommandSuggestionPlugin.java

@@ -20,7 +20,7 @@ public class CommandSuggestionPlugin extends ChatPlugin.Listener {
     }
 
     @Override
-    public void systemMessageReceived(Component component, boolean isCommandSuggestions, boolean isAuth, String string, String ansi) {
+    public void systemMessageReceived(Component component, boolean isCommandSuggestions, boolean isAuth, boolean isImposterFormat, String string, String ansi) {
         if (!isCommandSuggestions) return;
 
         try {

src/main/java/land/chipmunk/chayapak/chomens_bot/plugins/FormatCheckerPlugin.java

@@ -0,0 +1,64 @@
+package land.chipmunk.chayapak.chomens_bot.plugins;
+
+import com.google.common.hash.Hashing;
+import land.chipmunk.chayapak.chomens_bot.Bot;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.TextComponent;
+import net.kyori.adventure.text.TranslatableComponent;
+
+import java.nio.charset.StandardCharsets;
+import java.util.List;
+
+public class FormatCheckerPlugin extends ChatPlugin.Listener {
+    private final Bot bot;
+
+    public FormatCheckerPlugin (Bot bot) {
+        this.bot = bot;
+
+        bot.chat.addListener(this);
+    }
+
+    @Override
+    public void systemMessageReceived(Component component, boolean isCommandSuggestions, boolean isAuth, boolean isImposterFormat, String string, String ansi) {
+        if (!isImposterFormat) return;
+
+        bot.chat.tellraw(Component.text("fake chomens custom chat .,.,.,.,"));
+    }
+
+    public boolean isImposterFormat (Component component) {
+        if (!(component instanceof TranslatableComponent format)) return false;
+
+        final List<Component> args = format.args();
+        if (args.size() < 3 || !format.key().equals("[%s] %s › %s")) return false;
+
+        final Component nameComponent = format.args().get(1);
+
+        if (!(nameComponent instanceof TextComponent)) return false;
+
+        final String name = ((TextComponent) nameComponent).content();
+
+        if (!name.equals(bot.config.ownerName)) return false;
+
+        final Component prefix = format.args().get(0);
+
+        if (!(prefix instanceof TranslatableComponent translatablePrefix)) return true;
+
+        final Component userHash = translatablePrefix.args().get(0);
+
+        if (userHash == null) return true;
+
+        if (!(userHash instanceof TextComponent userHashComponent)) return true;
+
+        final long time = System.currentTimeMillis() / 10_000;
+
+        final String key = bot.config.imposterFormatChecker.key;
+
+        final String hash = Hashing.sha256()
+                // very pro hash input
+                .hashString(key + key + time + time, StandardCharsets.UTF_8)
+                .toString()
+                .substring(0, 8);
+
+        return !hash.equals(userHashComponent.content());
+    }
+}

src/main/resources/default-config.yml

@@ -51,6 +51,10 @@ colorPalette:
 
 ownerName: 'chayapak' # currently this is only used in the console
 
+imposterFormatChecker:
+  enabled: false
+  key: ''
+
 ownerAuthentication:
   enabled: false
   key: ''
@@ -106,9 +110,6 @@ selfCare:
     prefix: '&8[&eChomeNS Bot&8]'
   username: true # MIGHT cause problem(s) if set to false (not tested,.,.)
 
-eval:
-  address: 'ws://localhost:3069'
-
 bots:
   # username - optional, if not specified it will just use a random username
   # creayun - defaults to false