Add WorldIdentifier

2025-12-17 20:31:21 +01:00
parent 367a72141a
commit 4e994813eb
6 changed files with 277 additions and 0 deletions
@@ -0,0 +1,70 @@
+/*
+ *   This file is a part of the SteamWar software.
+ *
+ *   Copyright (C) 2025 SteamWar.de-Serverteam
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Affero General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU Affero General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Affero General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.core;
+
+import com.comphenix.tinyprotocol.TinyProtocol;
+import de.steamwar.Reflection;
+import net.minecraft.network.protocol.game.PacketPlayOutLogin;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.world.level.World;
+
+public class WorldIdentifier20 implements WorldIdentifier.IWorldIdentifier {
+
+    private static ResourceKey<World> resourceKey = null;
+
+    private static final Reflection.Field<Integer> playerId = Reflection.getField(PacketPlayOutLogin.class, int.class, 0);
+    private static final Class<?> resourceKeyClass = Reflection.getClass("net.minecraft.resources.ResourceKey");
+    private static final Class<?> minecraftKeyClass = Reflection.getClass("net.minecraft.resources.MinecraftKey");
+    private static final Reflection.Constructor resourceKeyConstructor = Reflection.getConstructor(resourceKeyClass, minecraftKeyClass, minecraftKeyClass);
+    private static final Reflection.Constructor minecraftKeyConstructor = Reflection.getConstructor(minecraftKeyClass, String.class, String.class);
+
+    @Override
+    public void setResourceKey(String name) {
+        resourceKey = (ResourceKey<World>) resourceKeyConstructor.invoke(minecraftKeyConstructor.invoke("minecraft", "dimension"), minecraftKeyConstructor.invoke("steamwar", name));
+    }
+
+    public WorldIdentifier20() {
+        TinyProtocol.instance.addFilter(PacketPlayOutLogin.class, (player, o) -> {
+            if (resourceKey == null) return o;
+            PacketPlayOutLogin packet = (PacketPlayOutLogin) o;
+
+            return new PacketPlayOutLogin(
+                    playerId.get(packet),
+                    packet.c(),
+                    packet.d(),
+                    packet.e(),
+                    packet.f(),
+                    packet.g(),
+                    packet.h(),
+                    resourceKey,
+                    packet.j(),
+                    packet.k(),
+                    packet.l(),
+                    packet.m(),
+                    packet.n(),
+                    packet.o(),
+                    packet.p(),
+                    packet.q(),
+                    packet.r(),
+                    packet.s()
+            );
+        });
+    }
+}