ViaVersion/common/src/main/java/com/viaversion/viaversion/protocols/protocol1_11to1_10/packets/InventoryPackets.java

/*
 * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
 * Copyright (C) 2016-2024 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_11to1_10.packets;

import com.viaversion.viaversion.api.minecraft.item.Item;
import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
import com.viaversion.viaversion.api.type.Type;
import com.viaversion.viaversion.protocols.protocol1_11to1_10.EntityIdRewriter;
import com.viaversion.viaversion.protocols.protocol1_11to1_10.Protocol1_11To1_10;
import com.viaversion.viaversion.protocols.protocol1_9_3to1_9_1_2.ClientboundPackets1_9_3;
import com.viaversion.viaversion.protocols.protocol1_9_3to1_9_1_2.ServerboundPackets1_9_3;
import com.viaversion.viaversion.rewriter.ItemRewriter;

public class InventoryPackets extends ItemRewriter<ClientboundPackets1_9_3, ServerboundPackets1_9_3, Protocol1_11To1_10> {

    public InventoryPackets(Protocol1_11To1_10 protocol) {
        super(protocol, Type.ITEM1_8, Type.ITEM1_8_SHORT_ARRAY);
    }

    @Override
    public void registerPackets() {
        registerSetSlot(ClientboundPackets1_9_3.SET_SLOT);
        registerWindowItems(ClientboundPackets1_9_3.WINDOW_ITEMS);
        registerEntityEquipment(ClientboundPackets1_9_3.ENTITY_EQUIPMENT);

        // Plugin message Packet -> Trading
        protocol.registerClientbound(ClientboundPackets1_9_3.PLUGIN_MESSAGE, new PacketHandlers() {
            @Override
            public void register() {
                map(Type.STRING); // 0 - Channel

                handler(wrapper -> {
                    if (wrapper.get(Type.STRING, 0).equalsIgnoreCase("MC|TrList")) {
                        wrapper.passthrough(Type.INT); // Passthrough Window ID

                        int size = wrapper.passthrough(Type.UNSIGNED_BYTE);
                        for (int i = 0; i < size; i++) {
                            EntityIdRewriter.toClientItem(wrapper.passthrough(Type.ITEM1_8)); // Input Item
                            EntityIdRewriter.toClientItem(wrapper.passthrough(Type.ITEM1_8)); // Output Item

                            boolean secondItem = wrapper.passthrough(Type.BOOLEAN); // Has second item
                            if (secondItem)
                                EntityIdRewriter.toClientItem(wrapper.passthrough(Type.ITEM1_8)); // Second Item

                            wrapper.passthrough(Type.BOOLEAN); // Trade disabled
                            wrapper.passthrough(Type.INT); // Number of tools uses
                            wrapper.passthrough(Type.INT); // Maximum number of trade uses
                        }
                    }
                });
            }
        });

        registerClickWindow(ServerboundPackets1_9_3.CLICK_WINDOW);
        registerCreativeInvAction(ServerboundPackets1_9_3.CREATIVE_INVENTORY_ACTION);
    }

    @Override
    public Item handleItemToClient(Item item) {
        EntityIdRewriter.toClientItem(item);
        return item;
    }

    @Override
    public Item handleItemToServer(Item item) {
        EntityIdRewriter.toServerItem(item);
        if (item == null) return null;
        boolean newItem = item.identifier() >= 218 && item.identifier() <= 234;
        newItem |= item.identifier() == 449 || item.identifier() == 450;
        if (newItem) { // Replace server-side unknown items
            item.setIdentifier(1);
            item.setData((short) 0);
        }
        return item;
    }
}