ViaVersion/common/src/main/java/com/viaversion/viaversion/protocols/protocol1_15to1_14_4/packets/WorldPackets.java

/*
 * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
 * Copyright (C) 2016-2023 ViaVersion and contributors
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.viaversion.viaversion.protocols.protocol1_15to1_14_4.packets;

import com.viaversion.viaversion.api.minecraft.chunks.Chunk;
import com.viaversion.viaversion.api.minecraft.chunks.ChunkSection;
import com.viaversion.viaversion.api.minecraft.chunks.DataPalette;
import com.viaversion.viaversion.api.minecraft.chunks.PaletteType;
import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
import com.viaversion.viaversion.api.protocol.remapper.PacketHandler;
import com.viaversion.viaversion.api.protocol.remapper.PacketRemapper;
import com.viaversion.viaversion.api.type.Type;
import com.viaversion.viaversion.protocols.protocol1_14to1_13_2.ClientboundPackets1_14;
import com.viaversion.viaversion.protocols.protocol1_14to1_13_2.types.Chunk1_14Type;
import com.viaversion.viaversion.protocols.protocol1_15to1_14_4.Protocol1_15To1_14_4;
import com.viaversion.viaversion.protocols.protocol1_15to1_14_4.types.Chunk1_15Type;
import com.viaversion.viaversion.rewriter.BlockRewriter;

public class WorldPackets {

    public static void register(Protocol1_15To1_14_4 protocol) {
        BlockRewriter<ClientboundPackets1_14> blockRewriter = new BlockRewriter<>(protocol, Type.POSITION1_14);

        blockRewriter.registerBlockAction(ClientboundPackets1_14.BLOCK_ACTION);
        blockRewriter.registerBlockChange(ClientboundPackets1_14.BLOCK_CHANGE);
        blockRewriter.registerMultiBlockChange(ClientboundPackets1_14.MULTI_BLOCK_CHANGE);
        blockRewriter.registerAcknowledgePlayerDigging(ClientboundPackets1_14.ACKNOWLEDGE_PLAYER_DIGGING);

        protocol.registerClientbound(ClientboundPackets1_14.CHUNK_DATA, new PacketRemapper() {
            @Override
            public void registerMap() {
                handler(new PacketHandler() {
                    @Override
                    public void handle(PacketWrapper wrapper) throws Exception {
                        Chunk chunk = wrapper.read(new Chunk1_14Type());
                        wrapper.write(new Chunk1_15Type(), chunk);

                        if (chunk.isFullChunk()) {
                            int[] biomeData = chunk.getBiomeData();
                            int[] newBiomeData = new int[1024];
                            if (biomeData != null) {
                                // Now in 4x4x4 areas - take the biome of each "middle"
                                for (int i = 0; i < 4; ++i) {
                                    for (int j = 0; j < 4; ++j) {
                                        int x = (j << 2) + 2;
                                        int z = (i << 2) + 2;
                                        int oldIndex = (z << 4 | x);
                                        newBiomeData[i << 2 | j] = biomeData[oldIndex];
                                    }
                                }
                                // ... and copy it to the new y layers
                                for (int i = 1; i < 64; ++i) {
                                    System.arraycopy(newBiomeData, 0, newBiomeData, i * 16, 16);
                                }
                            }

                            chunk.setBiomeData(newBiomeData);
                        }

                        for (int s = 0; s < chunk.getSections().length; s++) {
                            ChunkSection section = chunk.getSections()[s];
                            if (section == null) {
                                continue;
                            }

                            DataPalette palette = section.palette(PaletteType.BLOCKS);
                            for (int i = 0; i < palette.size(); i++) {
                                int mappedBlockStateId = protocol.getMappingData().getNewBlockStateId(palette.idByIndex(i));
                                palette.setIdByIndex(i, mappedBlockStateId);
                            }
                        }
                    }
                });
            }
        });

        blockRewriter.registerEffect(ClientboundPackets1_14.EFFECT, 1010, 2001);
        protocol.registerClientbound(ClientboundPackets1_14.SPAWN_PARTICLE, new PacketRemapper() {
            @Override
            public void registerMap() {
                map(Type.INT); // 0 - Particle ID
                map(Type.BOOLEAN); // 1 - Long Distance
                map(Type.FLOAT, Type.DOUBLE); // 2 - X
                map(Type.FLOAT, Type.DOUBLE); // 3 - Y
                map(Type.FLOAT, Type.DOUBLE); // 4 - Z
                map(Type.FLOAT); // 5 - Offset X
                map(Type.FLOAT); // 6 - Offset Y
                map(Type.FLOAT); // 7 - Offset Z
                map(Type.FLOAT); // 8 - Particle Data
                map(Type.INT); // 9 - Particle Count
                handler(new PacketHandler() {
                    @Override
                    public void handle(PacketWrapper wrapper) throws Exception {
                        int id = wrapper.get(Type.INT, 0);
                        if (id == 3 || id == 23) {
                            int data = wrapper.passthrough(Type.VAR_INT);
                            wrapper.set(Type.VAR_INT, 0, protocol.getMappingData().getNewBlockStateId(data));
                        } else if (id == 32) {
                            protocol.getItemRewriter().handleItemToClient(wrapper.passthrough(Type.FLAT_VAR_INT_ITEM));
                        }
                    }
                });
            }
        });
    }
}