BauSystem_Main/src/de/steamwar/bausystem/features/other/NoClipCommand.java

@@ -27,11 +27,9 @@ import de.steamwar.bausystem.linkage.LinkageType;
 import de.steamwar.bausystem.linkage.Linked;
 import de.steamwar.bausystem.utils.ProtocolAPI;
 import de.steamwar.command.SWCommand;
+import de.steamwar.core.Core;
 import de.steamwar.core.VersionedRunnable;
 import lombok.Getter;
-import net.minecraft.server.v1_15_R1.EnumGamemode;
-import net.minecraft.server.v1_15_R1.IChatBaseComponent;
-import net.minecraft.server.v1_15_R1.PacketPlayOutPlayerInfo;
 import org.bukkit.GameMode;
 import org.bukkit.craftbukkit.v1_15_R1.entity.CraftPlayer;
 import org.bukkit.entity.Player;
@@ -42,19 +40,28 @@ import org.bukkit.event.player.PlayerGameModeChangeEvent;
 import org.bukkit.event.player.PlayerTeleportEvent;
 import org.bukkit.event.player.PlayerToggleFlightEvent;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 import java.util.function.BiFunction;
 
 @Linked(LinkageType.COMMAND)
 @Linked(LinkageType.LISTENER)
 public class NoClipCommand extends SWCommand implements Listener {
 
-    public static final Class<?> playerInfo = Reflection.getClass("{nms}.PacketPlayOutPlayerInfo");
-    private static final Reflection.FieldAccessor<PacketPlayOutPlayerInfo.EnumPlayerInfoAction> playerInfoAction = Reflection.getField(playerInfo, PacketPlayOutPlayerInfo.EnumPlayerInfoAction.class, 0);
-    private static final Reflection.FieldAccessor playerInfoDataList = Reflection.getField(playerInfo, "b", List.class);
+    private static final Class<?> playerInfoPacket = Reflection.getClass("{nms}.PacketPlayOutPlayerInfo");
+    private static final Reflection.ConstructorInvoker playerInfoConstructor = Reflection.getConstructor(playerInfoPacket);
+    private static final Class<?> playerInfoActionClass = Reflection.getClass("{nms}.PacketPlayOutPlayerInfo$EnumPlayerInfoAction");
+    public static final Object addPlayer = playerInfoActionClass.getEnumConstants()[0];
+    private static final Reflection.FieldAccessor<?> playerInfoAction = Reflection.getField(playerInfoPacket, playerInfoActionClass, 0);
+    private static final Object updateGamemode = playerInfoActionClass.getEnumConstants()[1];
+    public static final Object removePlayer = playerInfoActionClass.getEnumConstants()[4];
+    private static final Reflection.FieldAccessor<List> playerInfoData = Reflection.getField(playerInfoPacket, List.class, 0);
+    private static final Class<?> playerInfoDataClass = Reflection.getClass("{nms}.PacketPlayOutPlayerInfo$PlayerInfoData");
+    private static final Class<?> enumGamemode = Reflection.getClass(Core.getVersion() > 9 ? "{nms}.EnumGamemode" : "{nms}.WorldSettings$EnumGamemode");
+    public static final Object creative = enumGamemode.getEnumConstants()[2];
+    private static final Object spectator = enumGamemode.getEnumConstants()[4];
+    private static final Class<?> iChatBaseComponent = Reflection.getClass("{nms}.IChatBaseComponent");
+
+    private static final Reflection.ConstructorInvoker playerInfoDataConstructor = Reflection.getConstructor(playerInfoDataClass, playerInfoPacket, GameProfile.class, int.class, enumGamemode, iChatBaseComponent);
 
     public static final Class<?> gameStateChange = Reflection.getClass("{nms}.PacketPlayOutGameStateChange");
     private static final Reflection.FieldAccessor<Integer> integerFieldAccessor = Reflection.getField(gameStateChange, int.class, 0);
@@ -106,14 +113,6 @@ public class NoClipCommand extends SWCommand implements Listener {
             ((CraftPlayer) player).getHandle().abilities.mayBuild = true;
             ((CraftPlayer) player).getHandle().abilities.canInstantlyBuild = true;
 
-            Object playerInfoObject = Reflection.newInstance(playerInfo);
-            playerInfoAction.set(playerInfoObject, PacketPlayOutPlayerInfo.EnumPlayerInfoAction.UPDATE_GAME_MODE);
-            PacketPlayOutPlayerInfo packetPlayOutPlayerInfo = (PacketPlayOutPlayerInfo) playerInfoObject;
-
-            List<PacketPlayOutPlayerInfo.PlayerInfoData> playerInfoData = new ArrayList<>();
-            playerInfoData.add(packetPlayOutPlayerInfo.new PlayerInfoData(new GameProfile(player.getUniqueId(), player.getName()), 1, EnumGamemode.SPECTATOR, IChatBaseComponent.ChatSerializer.b(player.getDisplayName())));
-            playerInfoDataList.set(playerInfoObject, playerInfoData);
-
             Object gameStateChangeObject = Reflection.newInstance(gameStateChange);
             integerFieldAccessor.set(gameStateChangeObject, 3);
             floatFieldAccessor.set(gameStateChangeObject, 1F);
@@ -121,7 +120,7 @@ public class NoClipCommand extends SWCommand implements Listener {
             NOCLIPS.add(player);
             BauSystem.MESSAGE.send("OTHER_NOCLIP_SLOT_INFO", player);
             ProtocolAPI.tinyProtocol.sendPacket(player, gameStateChangeObject);
-            ProtocolAPI.tinyProtocol.sendPacket(player, playerInfoObject);
+            pseudoSpectator(player, false);
         }
     }
 
@@ -157,4 +156,15 @@ public class NoClipCommand extends SWCommand implements Listener {
             event.setCancelled(true);
         }
     }
+
+    public static void pseudoSpectator(Player player, boolean enable) {
+        ProtocolAPI.tinyProtocol.sendPacket(player, playerInfoPacket(updateGamemode, new GameProfile(player.getUniqueId(), player.getName()), enable ? creative : spectator));
+    }
+
+    public static Object playerInfoPacket(Object action, GameProfile profile, Object mode) {
+        Object packet = playerInfoConstructor.invoke();
+        playerInfoAction.set(packet, action);
+        playerInfoData.set(packet, Collections.singletonList(playerInfoDataConstructor.invoke(packet, profile, 0, mode, null)));
+        return packet;
+    }
 }