Implement new gamerule menu (#6304)

* Start on implementing new gamerule packets and proper ViaVersion-based Java server version detection

* More work on gamerules et al

* Also add 26.1

* Yeet the JavaVersion stuff for now, that needs wayyyyyyyyy more testing

* Load deprecated language key file

* Cherry-pick language deprecation handling, add gamerule category based sorting

* <3

* Fix min/max swap, yeet unused permission

* Address review

* Fix tests and Javadocs

---------

Co-authored-by: Eclipse <eclipse@eclipseisoffline.xyz>

Author: onebeastchris

bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/world/manager/GeyserSpigotWorldManager.java

@@ -34,15 +34,12 @@
 import org.cloudburstmc.math.vector.Vector3i;
 import org.geysermc.erosion.bukkit.BukkitUtils;
 import org.geysermc.erosion.bukkit.SchedulerUtils;
-import org.geysermc.geyser.GeyserImpl;
-import org.geysermc.geyser.level.GameRule;
 import org.geysermc.geyser.level.WorldManager;
 import org.geysermc.geyser.registry.BlockRegistries;
 import org.geysermc.geyser.session.GeyserSession;
 import org.geysermc.mcprotocollib.protocol.data.game.entity.player.GameMode;
 
 import java.util.List;
-import java.util.Objects;
 import java.util.concurrent.CompletableFuture;
 import java.util.function.Consumer;
 
@@ -86,38 +83,6 @@ public boolean hasOwnChunkCache() {
         return true;
     }
 
-    public boolean getGameRuleBool(GeyserSession session, GameRule gameRule) {
-        org.bukkit.GameRule<?> bukkitGameRule = org.bukkit.GameRule.getByName(gameRule.getJavaID());
-        if (bukkitGameRule == null) {
-            GeyserImpl.getInstance().getLogger().debug("Unknown game rule " + gameRule.getJavaID());
-            return gameRule.getDefaultBooleanValue();
-        }
-
-        Player bukkitPlayer = Objects.requireNonNull(Bukkit.getPlayer(session.getPlayerEntity().uuid()));
-        Object value = bukkitPlayer.getWorld().getGameRuleValue(bukkitGameRule);
-        if (value instanceof Boolean booleanValue) {
-            return booleanValue;
-        }
-        GeyserImpl.getInstance().getLogger().debug("Expected a bool for " + gameRule + " but got " + value);
-        return gameRule.getDefaultBooleanValue();
-    }
-
-    @Override
-    public int getGameRuleInt(GeyserSession session, GameRule gameRule) {
-        org.bukkit.GameRule<?> bukkitGameRule = org.bukkit.GameRule.getByName(gameRule.getJavaID());
-        if (bukkitGameRule == null) {
-            GeyserImpl.getInstance().getLogger().debug("Unknown game rule " + gameRule.getJavaID());
-            return gameRule.getDefaultIntValue();
-        }
-        Player bukkitPlayer = Objects.requireNonNull(Bukkit.getPlayer(session.getPlayerEntity().uuid()));
-        Object value = bukkitPlayer.getWorld().getGameRuleValue(bukkitGameRule);
-        if (value instanceof Integer intValue) {
-            return intValue;
-        }
-        GeyserImpl.getInstance().getLogger().debug("Expected an int for " + gameRule + " but got " + value);
-        return gameRule.getDefaultIntValue();
-    }
-
     @Override
     public GameMode getDefaultGameMode(GeyserSession session) {
         return GameMode.byId(Bukkit.getDefaultGameMode().ordinal());

core/src/main/java/org/geysermc/geyser/GeyserImpl.java

@@ -262,6 +262,7 @@ public void initialize() {
                 return;
             }
 
+            MinecraftLocale.downloadDeprecations();
             MinecraftLocale.ensureEN_US();
             String locale = GeyserLocale.getDefaultLocale();
             if (!"en_us".equals(locale)) {

core/src/main/java/org/geysermc/geyser/Permissions.java

@@ -39,7 +39,6 @@ public final class Permissions {
 
     public static final String CHECK_UPDATE = register("geyser.update");
     public static final String SERVER_SETTINGS = register("geyser.settings.server");
-    public static final String SETTINGS_GAMERULES = register("geyser.settings.gamerules");
 
     private Permissions() {
         //no

core/src/main/java/org/geysermc/geyser/command/CommandRegistry.java

@@ -48,6 +48,7 @@
 import org.geysermc.geyser.command.defaults.CustomOptionsCommand;
 import org.geysermc.geyser.command.defaults.DumpCommand;
 import org.geysermc.geyser.command.defaults.ExtensionsCommand;
+import org.geysermc.geyser.command.defaults.GameruleCommand;
 import org.geysermc.geyser.command.defaults.HelpCommand;
 import org.geysermc.geyser.command.defaults.ListCommand;
 import org.geysermc.geyser.command.defaults.OffhandCommand;
@@ -170,6 +171,7 @@ public CommandRegistry(GeyserImpl geyser, CommandManager<GeyserCommandSource> cl
         registerBuiltInCommand(new PingCommand("ping", "geyser.commands.ping.desc", "geyser.command.ping"));
         registerBuiltInCommand(new CustomOptionsCommand("options", "geyser.commands.options.desc", "geyser.command.options"));
         registerBuiltInCommand(new QuickActionsCommand("quickactions", "geyser.commands.quickactions.desc", "geyser.command.quickactions"));
+        registerBuiltInCommand(new GameruleCommand("gamerules", "geyser.commands.gamerules.desc", "geyser.command.gamerules"));
 
         if (this.geyser.platformType() == PlatformType.STANDALONE) {
             registerBuiltInCommand(new StopCommand(geyser, "stop", "geyser.commands.stop.desc", "geyser.command.stop"));

core/src/main/java/org/geysermc/geyser/command/defaults/GameruleCommand.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2026 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.command.defaults;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.geysermc.geyser.api.util.TriState;
+import org.geysermc.geyser.command.GeyserCommand;
+import org.geysermc.geyser.command.GeyserCommandSource;
+import org.geysermc.geyser.session.GeyserSession;
+import org.incendo.cloud.context.CommandContext;
+
+public class GameruleCommand extends GeyserCommand {
+
+    public GameruleCommand(@NonNull String name, @NonNull String description, @NonNull String permission) {
+        super(name, description, permission, TriState.NOT_SET, true, true);
+    }
+
+    @Override
+    public void execute(CommandContext<GeyserCommandSource> context) {
+        GeyserSession session = context.sender().connection();
+        if (session != null) {
+            session.getGameRuleHandler().requestGamerules();
+        }
+    }
+}

core/src/main/java/org/geysermc/geyser/level/GameRule.java

@@ -25,8 +25,6 @@
 
 package org.geysermc.geyser.level;
 
-import it.unimi.dsi.fastutil.objects.Object2ObjectMap;
-import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
 import org.cloudburstmc.math.vector.Vector3i;
 import org.geysermc.erosion.packet.backendbound.BackendboundBatchBlockRequestPacket;
 import org.geysermc.erosion.packet.backendbound.BackendboundBlockRequestPacket;
@@ -38,7 +36,6 @@
 import java.util.concurrent.CompletableFuture;
 
 public class GeyserWorldManager extends WorldManager {
-    private final Object2ObjectMap<String, String> gameruleCache = new Object2ObjectOpenHashMap<>();
 
     @Override
     public int getBlockAt(GeyserSession session, int x, int y, int z) {
@@ -89,32 +86,6 @@ public boolean hasOwnChunkCache() {
         return false;
     }
 
-    @Override
-    public void setGameRule(GeyserSession session, String name, Object value) {
-        super.setGameRule(session, name, value);
-        gameruleCache.put(name, String.valueOf(value));
-    }
-
-    @Override
-    public boolean getGameRuleBool(GeyserSession session, GameRule gameRule) {
-        String value = gameruleCache.get(gameRule.getJavaID());
-        if (value != null) {
-            return Boolean.parseBoolean(value);
-        }
-
-        return gameRule.getDefaultBooleanValue();
-    }
-
-    @Override
-    public int getGameRuleInt(GeyserSession session, GameRule gameRule) {
-        String value = gameruleCache.get(gameRule.getJavaID());
-        if (value != null) {
-            return Integer.parseInt(value);
-        }
-
-        return gameRule.getDefaultIntValue();
-    }
-
     @Override
     public GameMode getDefaultGameMode(GeyserSession session) {
         return GameMode.SURVIVAL;