Geyser/connector/src/main/java/org/geysermc/connector/network/translators/inventory/translators/MerchantInventoryTranslator.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.nukkitx.math.vector.Vector3f;
import com.nukkitx.protocol.bedrock.data.entity.EntityData;
import com.nukkitx.protocol.bedrock.data.entity.EntityDataMap;
import com.nukkitx.protocol.bedrock.data.entity.EntityLinkData;
import com.nukkitx.protocol.bedrock.data.inventory.ContainerSlotType;
import com.nukkitx.protocol.bedrock.data.inventory.ItemStackRequest;
import com.nukkitx.protocol.bedrock.data.inventory.StackRequestSlotInfoData;
import com.nukkitx.protocol.bedrock.packet.ItemStackResponsePacket;
import com.nukkitx.protocol.bedrock.packet.SetEntityLinkPacket;
import org.geysermc.connector.entity.Entity;
import org.geysermc.connector.entity.type.EntityType;
import org.geysermc.connector.inventory.Inventory;
import org.geysermc.connector.inventory.MerchantContainer;
import org.geysermc.connector.inventory.PlayerInventory;
import org.geysermc.connector.network.session.GeyserSession;
import org.geysermc.connector.network.translators.inventory.BedrockContainerSlot;
import org.geysermc.connector.network.translators.inventory.SlotType;
import org.geysermc.connector.network.translators.inventory.updater.InventoryUpdater;
import org.geysermc.connector.network.translators.inventory.updater.UIInventoryUpdater;

public class MerchantInventoryTranslator extends BaseInventoryTranslator {
    private final InventoryUpdater updater;

    public MerchantInventoryTranslator() {
        super(3);
        this.updater = UIInventoryUpdater.INSTANCE;
    }

    @Override
    public int javaSlotToBedrock(int slot) {
        return switch (slot) {
            case 0 -> 4;
            case 1 -> 5;
            case 2 -> 50;
            default -> super.javaSlotToBedrock(slot);
        };
    }

    @Override
    public BedrockContainerSlot javaSlotToBedrockContainer(int slot) {
        return switch (slot) {
            case 0 -> new BedrockContainerSlot(ContainerSlotType.TRADE2_INGREDIENT1, 4);
            case 1 -> new BedrockContainerSlot(ContainerSlotType.TRADE2_INGREDIENT2, 5);
            case 2 -> new BedrockContainerSlot(ContainerSlotType.TRADE2_RESULT, 50);
            default -> super.javaSlotToBedrockContainer(slot);
        };
    }

    @Override
    public int bedrockSlotToJava(StackRequestSlotInfoData slotInfoData) {
        return switch (slotInfoData.getContainer()) {
            case TRADE2_INGREDIENT1 -> 0;
            case TRADE2_INGREDIENT2 -> 1;
            case TRADE2_RESULT, CREATIVE_OUTPUT -> 2;
            default -> super.bedrockSlotToJava(slotInfoData);
        };
    }

    @Override
    public SlotType getSlotType(int javaSlot) {
        if (javaSlot == 2) {
            return SlotType.OUTPUT;
        }
        return SlotType.NORMAL;
    }

    @Override
    public void prepareInventory(GeyserSession session, Inventory inventory) {
        MerchantContainer merchantInventory = (MerchantContainer) inventory;
        if (merchantInventory.getVillager() == null) {
            long geyserId = session.getEntityCache().getNextEntityId().incrementAndGet();
            Vector3f pos = session.getPlayerEntity().getPosition().sub(0, 3, 0);

            EntityDataMap metadata = new EntityDataMap();
            metadata.put(EntityData.SCALE, 0f);
            metadata.put(EntityData.BOUNDING_BOX_WIDTH, 0f);
            metadata.put(EntityData.BOUNDING_BOX_HEIGHT, 0f);

            Entity villager = new Entity(0, geyserId, EntityType.VILLAGER, pos, Vector3f.ZERO, Vector3f.ZERO);
            villager.setMetadata(metadata);
            villager.spawnEntity(session);

            SetEntityLinkPacket linkPacket = new SetEntityLinkPacket();
            EntityLinkData.Type type = EntityLinkData.Type.PASSENGER;
            linkPacket.setEntityLink(new EntityLinkData(session.getPlayerEntity().getGeyserId(), geyserId, type, true, false));
            session.sendUpstreamPacket(linkPacket);

            merchantInventory.setVillager(villager);
        }
    }

    @Override
    public void openInventory(GeyserSession session, Inventory inventory) {
        //Handled in JavaTradeListTranslator
        //TODO: send a blank inventory here in case the villager doesn't send a TradeList packet
    }

    @Override
    public void closeInventory(GeyserSession session, Inventory inventory) {
        MerchantContainer merchantInventory = (MerchantContainer) inventory;
        if (merchantInventory.getVillager() != null) {
            merchantInventory.getVillager().despawnEntity(session);
        }
    }

    @Override
    public ItemStackResponsePacket.Response translateAutoCraftingRequest(GeyserSession session, Inventory inventory, ItemStackRequest request) {
        // We're not crafting here
        // Called at least by consoles when pressing a trade option button
        return translateRequest(session, inventory, request);
    }

    @Override
    public void updateInventory(GeyserSession session, Inventory inventory) {
        updater.updateInventory(this, session, inventory);
    }

    @Override
    public void updateSlot(GeyserSession session, Inventory inventory, int slot) {
        updater.updateSlot(this, session, inventory, slot);
    }

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