feat: first mixins attempt

src/main/java/org/itqop/whitelist/WhitelistEventHandler.java

@@ -25,6 +25,7 @@ public class WhitelistEventHandler {
         WhitelistCommands.register(event.getDispatcher());
     }
 
+    // Check whitelist when player logs in
     @SubscribeEvent(priority = EventPriority.HIGHEST)
     public static void onPlayerLogin(PlayerEvent.PlayerLoggedInEvent event) {
         if (!Config.enableWhitelist) return;
@@ -47,35 +48,24 @@ public class WhitelistEventHandler {
                 )
                 .join();
 
-            // If check failed or player not whitelisted, kick immediately
+            // If check failed or player not whitelisted, disconnect immediately
             if (!response.isSuccess() || !response.isWhitelisted()) {
-                kickPlayer(player, createKickMessage(response.isSuccess()));
+                disconnectPlayer(player, createKickMessage(response.isSuccess()));
             }
 
         } catch (Exception e) {
             // On any error, deny access
             LOGGER.error("Whitelist check error for '{}': {}", playerName, e.getMessage());
-            kickPlayer(player, Component.literal("Whitelist service error. Please contact administrator."));
+            disconnectPlayer(player, Component.literal("Whitelist service error. Please contact administrator."));
         }
     }
 
-    private static void kickPlayer(ServerPlayer player, Component message) {
-        if (player.server == null || player.connection == null) return;
+    private static void disconnectPlayer(ServerPlayer player, Component message) {
+        if (player.connection == null) return;
 
-        // Send disconnect message with delay to ensure client receives it
-        // Without delay, rapid reconnects may fail to show the message
-        player.server.execute(() -> {
-            if (player.connection != null) {
-                try {
-                    // Small delay to ensure message packet is sent before connection close
-                    Thread.sleep(100);
-                } catch (InterruptedException e) {
-                    Thread.currentThread().interrupt();
-                }
+        // Disconnect player - mixin will suppress all join/leave messages
         player.connection.disconnect(message);
-                LOGGER.info("Player '{}' kicked from whitelist", player.getGameProfile().getName());
-            }
-        });
+        LOGGER.info("Player '{}' denied access (not in whitelist)", player.getGameProfile().getName());
     }
 
     private static Component createKickMessage(boolean apiAvailable) {

src/main/java/org/itqop/whitelist/mixin/PlayerListMixin.java

@@ -0,0 +1,37 @@
+package org.itqop.whitelist.mixin;
+
+import net.minecraft.network.chat.Component;
+import net.minecraft.server.players.PlayerList;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.ModifyArg;
+
+@Mixin(PlayerList.class)
+public class PlayerListMixin {
+
+    /**
+     * Suppress ALL player join/leave messages
+     * Intercepts ALL calls to broadcastSystemMessage and filters out join/leave messages
+     */
+    @ModifyArg(method = "*",
+            at = @At(value = "INVOKE",
+                    target = "Lnet/minecraft/server/players/PlayerList;broadcastSystemMessage(Lnet/minecraft/network/chat/Component;Z)V"),
+            index = 0)
+    private Component suppressJoinLeaveMessages(Component original) {
+        String messageString = original.getString();
+
+        // Check if this is a join or leave message
+        // Common patterns: "Player joined the game", "Player left the game"
+        // Russian: "Игрок присоединился к игре", "Игрок покинул игру"
+        if (messageString.contains("joined the game") ||
+            messageString.contains("left the game") ||
+            messageString.contains("присоединился") ||
+            messageString.contains("покинул")) {
+            // Return empty component to suppress the message
+            return Component.empty();
+        }
+
+        // For all other messages, return the original
+        return original;
+    }
+}

src/main/resources/whitelist.mixins.json

@@ -0,0 +1,13 @@
+{
+  "required": true,
+  "minVersion": "0.8",
+  "package": "org.itqop.whitelist.mixin",
+  "compatibilityLevel": "JAVA_21",
+  "refmap": "whitelist.refmap.json",
+  "mixins": [
+    "PlayerListMixin"
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  }
+}

src/main/templates/META-INF/neoforge.mods.toml

@@ -35,8 +35,8 @@ authors = "${mod_authors}" #optional
 description = '''${mod_description}'''
 
 # The [[mixins]] block allows you to declare your mixin config to FML so that it gets loaded.
-#[[mixins]]
-#config="${mod_id}.mixins.json"
+[[mixins]]
+config="${mod_id}.mixins.json"
 
 # The [[accessTransformers]] block allows you to declare where your AT file is.
 # If this block is omitted, a fallback attempt will be made to load an AT from META-INF/accesstransformer.cfg