/* * 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.java.world;import com.github.steveice10.mc.protocol.data.game.entity.metadata.ItemStack;import com.github.steveice10.mc.protocol.data.game.window.VillagerTrade;import com.github.steveice10.mc.protocol.packet.ingame.server.window.ServerTradeListPacket;import com.nukkitx.nbt.NbtMap;import com.nukkitx.nbt.NbtMapBuilder;import com.nukkitx.nbt.NbtType;import com.nukkitx.protocol.bedrock.data.entity.EntityData;import com.nukkitx.protocol.bedrock.data.inventory.ContainerType;import com.nukkitx.protocol.bedrock.data.inventory.ItemData;import com.nukkitx.protocol.bedrock.packet.UpdateTradePacket;import org.geysermc.connector.entity.Entity;import org.geysermc.connector.inventory.Inventory;import org.geysermc.connector.inventory.MerchantContainer;import org.geysermc.connector.network.session.GeyserSession;import org.geysermc.connector.network.translators.PacketTranslator;import org.geysermc.connector.network.translators.Translator;import org.geysermc.connector.network.translators.item.ItemTranslator;import org.geysermc.connector.registry.type.ItemMapping;import java.util.ArrayList;import java.util.List;@Translator(packet = ServerTradeListPacket.class)public class JavaTradeListTranslator extends PacketTranslator<ServerTradeListPacket> {    @Override    public void translate(GeyserSession session, ServerTradeListPacket packet) {        Inventory openInventory = session.getOpenInventory();        if (!(openInventory instanceof MerchantContainer && openInventory.getId() == packet.getWindowId())) {            return;        }        // Retrieve the fake villager involved in the trade, and update its metadata to match with the window information        MerchantContainer merchantInventory = (MerchantContainer) openInventory;        merchantInventory.setVillagerTrades(packet.getTrades());        Entity villager = merchantInventory.getVillager();        villager.getMetadata().put(EntityData.TRADE_TIER, packet.getVillagerLevel() - 1);        villager.getMetadata().put(EntityData.MAX_TRADE_TIER, 4);        villager.getMetadata().put(EntityData.TRADE_XP, packet.getExperience());        villager.updateBedrockMetadata(session);        // Construct the packet that opens the trading window        UpdateTradePacket updateTradePacket = new UpdateTradePacket();        updateTradePacket.setTradeTier(packet.getVillagerLevel() - 1);        updateTradePacket.setContainerId((short) packet.getWindowId());        updateTradePacket.setContainerType(ContainerType.TRADE);        updateTradePacket.setDisplayName(openInventory.getTitle());        updateTradePacket.setSize(0);        updateTradePacket.setNewTradingUi(true);        updateTradePacket.setUsingEconomyTrade(true);        updateTradePacket.setPlayerUniqueEntityId(session.getPlayerEntity().getGeyserId());        updateTradePacket.setTraderUniqueEntityId(villager.getGeyserId());        NbtMapBuilder builder = NbtMap.builder();        boolean addExtraTrade = packet.isRegularVillager() && packet.getVillagerLevel() < 5;        List<NbtMap> tags = new ArrayList<>(addExtraTrade ? packet.getTrades().length + 1 : packet.getTrades().length);        for (int i = 0; i < packet.getTrades().length; i++) {            VillagerTrade trade = packet.getTrades()[i];            NbtMapBuilder recipe = NbtMap.builder();            recipe.putInt("netId", i + 1);            recipe.putInt("maxUses", trade.isTradeDisabled() ? 0 : trade.getMaxUses());            recipe.putInt("traderExp", trade.getXp());            recipe.putFloat("priceMultiplierA", trade.getPriceMultiplier());            recipe.put("sell", getItemTag(session, trade.getOutput(), 0));            recipe.putFloat("priceMultiplierB", 0.0f);            recipe.putInt("buyCountB", trade.getSecondInput() != null ? trade.getSecondInput().getAmount() : 0);            recipe.putInt("buyCountA", trade.getFirstInput().getAmount());            recipe.putInt("demand", trade.getDemand());            recipe.putInt("tier", packet.getVillagerLevel() > 0 ? packet.getVillagerLevel() - 1 : 0); // -1 crashes client            recipe.put("buyA", getItemTag(session, trade.getFirstInput(), trade.getSpecialPrice()));            if (trade.getSecondInput() != null) {                recipe.put("buyB", getItemTag(session, trade.getSecondInput(), 0));            }            recipe.putInt("uses", trade.getNumUses());            recipe.putByte("rewardExp", (byte) 1);            tags.add(recipe.build());        }        //Hidden trade to fix visual experience bug        if (addExtraTrade) {            tags.add(NbtMap.builder()                    .putInt("maxUses", 0)                    .putInt("traderExp", 0)                    .putFloat("priceMultiplierA", 0.0f)                    .putFloat("priceMultiplierB", 0.0f)                    .putInt("buyCountB", 0)                    .putInt("buyCountA", 0)                    .putInt("demand", 0)                    .putInt("tier", 5)                    .putInt("uses", 0)                    .putByte("rewardExp", (byte) 0)                    .build());        }        builder.putList("Recipes", NbtType.COMPOUND, tags);        List<NbtMap> expTags = new ArrayList<>(5);        expTags.add(NbtMap.builder().putInt("0", 0).build());        expTags.add(NbtMap.builder().putInt("1", 10).build());        expTags.add(NbtMap.builder().putInt("2", 70).build());        expTags.add(NbtMap.builder().putInt("3", 150).build());        expTags.add(NbtMap.builder().putInt("4", 250).build());        builder.putList("TierExpRequirements", NbtType.COMPOUND, expTags);        updateTradePacket.setOffers(builder.build());        session.sendUpstreamPacket(updateTradePacket);    }    private NbtMap getItemTag(GeyserSession session, ItemStack stack, int specialPrice) {        ItemData itemData = ItemTranslator.translateToBedrock(session, stack);        ItemMapping mapping = session.getItemMappings().getMapping(stack);        NbtMapBuilder builder = NbtMap.builder();        builder.putByte("Count", (byte) (Math.max(itemData.getCount() + specialPrice, 1)));        builder.putShort("Damage", (short) itemData.getDamage());        builder.putString("Name", mapping.getBedrockIdentifier());        if (itemData.getTag() != null) {            NbtMap tag = itemData.getTag().toBuilder().build();            builder.put("tag", tag);        }        NbtMap blockTag = session.getBlockMappings().getBedrockBlockNbt(mapping.getJavaIdentifier());        if (blockTag != null) {            // This fixes certain blocks being unable to stack after grabbing one            builder.putCompound("Block", blockTag);            builder.putShort("Damage", (short) 0);        }        return builder.build();    }}