Geyser/connector/src/main/java/org/geysermc/connector/network/translators/inventory/translators/LecternInventoryTranslator.java

/*
 * Copyright (c) 2019-2021 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.connector.network.translators.inventory.translators;

import com.github.steveice10.mc.protocol.data.game.window.WindowType;
import com.github.steveice10.mc.protocol.packet.ingame.client.window.ClientClickWindowButtonPacket;
import com.github.steveice10.mc.protocol.packet.ingame.client.window.ClientCloseWindowPacket;
import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
import com.github.steveice10.opennbt.tag.builtin.ListTag;
import com.nukkitx.math.vector.Vector3i;
import com.nukkitx.nbt.NbtMap;
import com.nukkitx.nbt.NbtMapBuilder;
import com.nukkitx.protocol.bedrock.data.inventory.ItemData;
import org.geysermc.connector.inventory.GeyserItemStack;
import org.geysermc.connector.inventory.Inventory;
import org.geysermc.connector.inventory.LecternContainer;
import org.geysermc.connector.inventory.PlayerInventory;
import org.geysermc.connector.network.session.GeyserSession;
import org.geysermc.connector.network.translators.inventory.updater.InventoryUpdater;
import org.geysermc.connector.utils.BlockEntityUtils;
import org.geysermc.connector.utils.InventoryUtils;

public class LecternInventoryTranslator extends BaseInventoryTranslator {
    private final InventoryUpdater updater;

    public LecternInventoryTranslator() {
        super(1);
        this.updater = new LecternInventoryUpdater();
    }

    @Override
    public void prepareInventory(GeyserSession session, Inventory inventory) {

    }

    @Override
    public void openInventory(GeyserSession session, Inventory inventory) {

    }

    @Override
    public void closeInventory(GeyserSession session, Inventory inventory) {

    }

    @Override
    public void updateProperty(GeyserSession session, Inventory inventory, int key, int value) {
        if (key == 0) { // Lectern page update
            LecternContainer lecternContainer = (LecternContainer) inventory;
            lecternContainer.setCurrentBedrockPage(value / 2);
            lecternContainer.setBlockEntityTag(lecternContainer.getBlockEntityTag().toBuilder().putInt("page", lecternContainer.getCurrentBedrockPage()).build());
            BlockEntityUtils.updateBlockEntity(session, lecternContainer.getBlockEntityTag(), lecternContainer.getPosition());
        }
    }

    @Override
    public void updateInventory(GeyserSession session, Inventory inventory) {

    }

    @Override
    public void updateSlot(GeyserSession session, Inventory inventory, int slot) {
        this.updater.updateSlot(this, session, inventory, slot);
        if (slot == 0) {
            LecternContainer lecternContainer = (LecternContainer) inventory;
            if (session.isDroppingLecternBook()) {
                // We have to enter the inventory GUI to eject the book
                ClientClickWindowButtonPacket packet = new ClientClickWindowButtonPacket(inventory.getId(), 3);
                session.sendDownstreamPacket(packet);
                session.setDroppingLecternBook(false);
                InventoryUtils.closeInventory(session, inventory.getId());
            } else if (lecternContainer.getBlockEntityTag() == null) {
                // If the method returns true, this is already handled for us
                GeyserItemStack geyserItemStack = inventory.getItem(0);
                CompoundTag tag = geyserItemStack.getNbt();
                if (tag != null) {
                    // Position has to be the last interacted position... right?
                    Vector3i position = session.getLastInteractionPosition();
                    // shouldRefresh means that we should boot out the client on our side because their lectern GUI isn't updated yet
                    boolean shouldRefresh = !session.getConnector().getWorldManager().shouldExpectLecternHandled() && !session.getLecternCache().contains(position);
                    int pagesSize = ((ListTag) tag.get("pages")).size();
                    ItemData itemData = geyserItemStack.getItemData(session);
                    NbtMapBuilder lecternTag = getBaseLecternTag(position.getX(), position.getY(), position.getZ(), pagesSize);
                    lecternTag.putCompound("book", NbtMap.builder()
                            .putByte("Count", (byte) itemData.getCount())
                            .putShort("Damage", (short) 0)
                            .putString("Name", "minecraft:written_book")
                            .putCompound("tag", itemData.getTag())
                            .build());
                    lecternTag.putInt("page", lecternContainer.getCurrentBedrockPage());
                    NbtMap blockEntityTag = lecternTag.build();
                    // Even with serverside access to lecterns, we don't easily know which lectern this is, so we need to rebuild
                    // the block entity tag
                    lecternContainer.setBlockEntityTag(blockEntityTag);
                    lecternContainer.setPosition(position);
                    if (shouldRefresh) {
                        // Update the lectern because it's not updated client-side
                        BlockEntityUtils.updateBlockEntity(session, blockEntityTag, position);
                        session.getLecternCache().add(position);
                        // Close the window - we will reopen it once the client has this data synced
                        ClientCloseWindowPacket closeWindowPacket = new ClientCloseWindowPacket(lecternContainer.getId());
                        session.sendDownstreamPacket(closeWindowPacket);
                        InventoryUtils.closeInventory(session, inventory.getId());
                        session.getConnector().getLogger().warning("Closing inventory");
                    }
                }
            }
        }
    }

    @Override
    public Inventory createInventory(String name, int windowId, WindowType windowType, PlayerInventory playerInventory) {
        return new LecternContainer(name, windowId, this.size, playerInventory);
    }

    public static NbtMapBuilder getBaseLecternTag(int x, int y, int z, int totalPages) {
        NbtMapBuilder builder = NbtMap.builder()
                .putInt("x", x)
                .putInt("y", y)
                .putInt("z", z)
                .putString("id", "Lectern");
        if (totalPages != 0) {
            builder.putByte("hasBook", (byte) 1);
            builder.putInt("totalPages", totalPages);
        } else {
            // Not usually needed, but helps with kicking out Bedrock players from reading the UI
            builder.putByte("hasBook", (byte) 0);
        }
        return builder;
    }

    private static class LecternInventoryUpdater extends InventoryUpdater {

    }
}