mirror of https://github.com/GeyserMC/Geyser.git
188 lines
9.6 KiB
Java
188 lines
9.6 KiB
Java
/*
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* Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @author GeyserMC
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* @link https://github.com/GeyserMC/Geyser
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*/
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package org.geysermc.geyser.translator.protocol.java.inventory;
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import com.github.steveice10.mc.protocol.data.game.entity.metadata.ItemStack;
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import com.github.steveice10.mc.protocol.data.game.inventory.VillagerTrade;
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import com.github.steveice10.mc.protocol.packet.ingame.clientbound.inventory.ClientboundMerchantOffersPacket;
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import com.nukkitx.nbt.NbtMap;
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import com.nukkitx.nbt.NbtMapBuilder;
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import com.nukkitx.nbt.NbtType;
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import com.nukkitx.protocol.bedrock.data.entity.EntityData;
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import com.nukkitx.protocol.bedrock.data.inventory.ContainerType;
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import com.nukkitx.protocol.bedrock.data.inventory.ItemData;
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import com.nukkitx.protocol.bedrock.packet.UpdateTradePacket;
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import org.geysermc.geyser.entity.type.Entity;
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import org.geysermc.geyser.inventory.Inventory;
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import org.geysermc.geyser.inventory.MerchantContainer;
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import org.geysermc.geyser.registry.type.ItemMapping;
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import org.geysermc.geyser.session.GeyserSession;
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import org.geysermc.geyser.translator.inventory.item.ItemTranslator;
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import org.geysermc.geyser.translator.protocol.PacketTranslator;
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import org.geysermc.geyser.translator.protocol.Translator;
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import org.geysermc.geyser.util.MathUtils;
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import java.util.ArrayList;
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import java.util.List;
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@Translator(packet = ClientboundMerchantOffersPacket.class)
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public class JavaMerchantOffersTranslator extends PacketTranslator<ClientboundMerchantOffersPacket> {
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@Override
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public void translate(GeyserSession session, ClientboundMerchantOffersPacket packet) {
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Inventory openInventory = session.getOpenInventory();
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if (!(openInventory instanceof MerchantContainer merchantInventory && openInventory.getId() == packet.getContainerId())) {
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return;
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}
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// No previous inventory was closed -> no need of queuing the merchant inventory
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if (!openInventory.isPending()) {
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openMerchant(session, packet, merchantInventory);
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return;
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}
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// The inventory is declared as pending due to previous closing inventory -> leads to an incorrect order of execution
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// Handled in BedrockContainerCloseTranslator
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merchantInventory.setPendingOffersPacket(packet);
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}
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public static void openMerchant(GeyserSession session, ClientboundMerchantOffersPacket packet, MerchantContainer merchantInventory) {
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// Retrieve the fake villager involved in the trade, and update its metadata to match with the window information
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merchantInventory.setVillagerTrades(packet.getTrades());
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Entity villager = merchantInventory.getVillager();
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villager.getDirtyMetadata().put(EntityData.TRADE_TIER, packet.getVillagerLevel() - 1);
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villager.getDirtyMetadata().put(EntityData.MAX_TRADE_TIER, 4);
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villager.getDirtyMetadata().put(EntityData.TRADE_XP, packet.getExperience());
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villager.updateBedrockMetadata();
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// Construct the packet that opens the trading window
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UpdateTradePacket updateTradePacket = new UpdateTradePacket();
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updateTradePacket.setTradeTier(packet.getVillagerLevel() - 1);
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updateTradePacket.setContainerId((short) packet.getContainerId());
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updateTradePacket.setContainerType(ContainerType.TRADE);
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updateTradePacket.setDisplayName(session.getOpenInventory().getTitle());
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updateTradePacket.setSize(0);
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updateTradePacket.setNewTradingUi(true);
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updateTradePacket.setUsingEconomyTrade(true);
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updateTradePacket.setPlayerUniqueEntityId(session.getPlayerEntity().getGeyserId());
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updateTradePacket.setTraderUniqueEntityId(villager.getGeyserId());
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NbtMapBuilder builder = NbtMap.builder();
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boolean addExtraTrade = packet.isRegularVillager() && packet.getVillagerLevel() < 5;
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List<NbtMap> tags = new ArrayList<>(addExtraTrade ? packet.getTrades().length + 1 : packet.getTrades().length);
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for (int i = 0; i < packet.getTrades().length; i++) {
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VillagerTrade trade = packet.getTrades()[i];
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NbtMapBuilder recipe = NbtMap.builder();
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recipe.putInt("netId", i + 1);
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recipe.putInt("maxUses", trade.isTradeDisabled() ? 0 : trade.getMaxUses());
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recipe.putInt("traderExp", trade.getXp());
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recipe.putFloat("priceMultiplierA", trade.getPriceMultiplier());
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recipe.putFloat("priceMultiplierB", 0.0f);
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recipe.put("sell", getItemTag(session, trade.getOutput()));
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// The buy count before demand and special price adjustments
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recipe.putInt("buyCountA", Math.max(trade.getFirstInput().getAmount(), 0));
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recipe.putInt("buyCountB", trade.getSecondInput() != null ? Math.max(trade.getSecondInput().getAmount(), 0) : 0);
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recipe.putInt("demand", trade.getDemand()); // Seems to have no effect
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recipe.putInt("tier", packet.getVillagerLevel() > 0 ? packet.getVillagerLevel() - 1 : 0); // -1 crashes client
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recipe.put("buyA", getItemTag(session, trade.getFirstInput(), trade.getSpecialPrice(), trade.getDemand(), trade.getPriceMultiplier()));
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recipe.put("buyB", getItemTag(session, trade.getSecondInput()));
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recipe.putInt("uses", trade.getNumUses());
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recipe.putByte("rewardExp", (byte) 1);
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tags.add(recipe.build());
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}
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//Hidden trade to fix visual experience bug
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if (addExtraTrade) {
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tags.add(NbtMap.builder()
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.putInt("maxUses", 0)
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.putInt("traderExp", 0)
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.putFloat("priceMultiplierA", 0.0f)
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.putFloat("priceMultiplierB", 0.0f)
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.putInt("buyCountB", 0)
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.putInt("buyCountA", 0)
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.putInt("demand", 0)
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.putInt("tier", 5)
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.putInt("uses", 0)
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.putByte("rewardExp", (byte) 0)
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.build());
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}
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builder.putList("Recipes", NbtType.COMPOUND, tags);
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List<NbtMap> expTags = new ArrayList<>(5);
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expTags.add(NbtMap.builder().putInt("0", 0).build());
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expTags.add(NbtMap.builder().putInt("1", 10).build());
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expTags.add(NbtMap.builder().putInt("2", 70).build());
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expTags.add(NbtMap.builder().putInt("3", 150).build());
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expTags.add(NbtMap.builder().putInt("4", 250).build());
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builder.putList("TierExpRequirements", NbtType.COMPOUND, expTags);
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updateTradePacket.setOffers(builder.build());
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session.sendUpstreamPacket(updateTradePacket);
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}
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private static NbtMap getItemTag(GeyserSession session, ItemStack stack) {
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if (stack == null || stack.getAmount() <= 0) { // Negative item counts appear as air on Java
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return NbtMap.EMPTY;
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}
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return getItemTag(session, stack, session.getItemMappings().getMapping(stack), stack.getAmount());
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}
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private static NbtMap getItemTag(GeyserSession session, ItemStack stack, int specialPrice, int demand, float priceMultiplier) {
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if (stack == null || stack.getAmount() <= 0) { // Negative item counts appear as air on Java
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return NbtMap.EMPTY;
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}
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ItemMapping mapping = session.getItemMappings().getMapping(stack);
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// Bedrock expects all price adjustments to be applied to the item's count
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int count = stack.getAmount() + ((int) Math.max(Math.floor(stack.getAmount() * demand * priceMultiplier), 0)) + specialPrice;
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count = MathUtils.constrain(count, 1, mapping.getStackSize());
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return getItemTag(session, stack, mapping, count);
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}
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private static NbtMap getItemTag(GeyserSession session, ItemStack stack, ItemMapping mapping, int count) {
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ItemData itemData = ItemTranslator.translateToBedrock(session, stack);
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String customIdentifier = session.getItemMappings().getCustomIdMappings().get(itemData.getId());
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NbtMapBuilder builder = NbtMap.builder();
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builder.putByte("Count", (byte) count);
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builder.putShort("Damage", (short) itemData.getDamage());
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builder.putString("Name", customIdentifier != null ? customIdentifier : mapping.getBedrockIdentifier());
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if (itemData.getTag() != null) {
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NbtMap tag = itemData.getTag().toBuilder().build();
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builder.put("tag", tag);
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}
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// Implementation note: previously we added a block tag to fix some blocks (black concrete?) that wouldn't stack
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// after buying. This no longer seems to be an issue as of Bedrock 1.18.30, and including it breaks sugar canes.
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return builder.build();
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}
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}
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