Java/JavaSetSlotTranslator.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.java.window;

import com.github.steveice10.mc.protocol.data.game.entity.metadata.ItemStack;
import com.github.steveice10.mc.protocol.data.game.recipe.Ingredient;
import com.github.steveice10.mc.protocol.data.game.recipe.Recipe;
import com.github.steveice10.mc.protocol.data.game.recipe.RecipeType;
import com.github.steveice10.mc.protocol.data.game.recipe.data.ShapedRecipeData;
import com.github.steveice10.mc.protocol.data.game.recipe.data.ShapelessRecipeData;
import com.github.steveice10.mc.protocol.packet.ingame.server.window.ServerSetSlotPacket;
import com.nukkitx.protocol.bedrock.data.inventory.ContainerId;
import com.nukkitx.protocol.bedrock.data.inventory.CraftingData;
import com.nukkitx.protocol.bedrock.data.inventory.ItemData;
import com.nukkitx.protocol.bedrock.packet.CraftingDataPacket;
import com.nukkitx.protocol.bedrock.packet.InventorySlotPacket;
import org.geysermc.connector.inventory.GeyserItemStack;
import org.geysermc.connector.inventory.Inventory;
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.inventory.InventoryTranslator;
import org.geysermc.connector.network.translators.inventory.translators.CraftingInventoryTranslator;
import org.geysermc.connector.network.translators.inventory.translators.PlayerInventoryTranslator;
import org.geysermc.connector.network.translators.item.ItemTranslator;
import org.geysermc.connector.utils.InventoryUtils;

import java.util.Arrays;
import java.util.Collections;
import java.util.Objects;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Translator(packet = ServerSetSlotPacket.class)
public class JavaSetSlotTranslator extends PacketTranslator<ServerSetSlotPacket> {

    @Override
    public void translate(GeyserSession session, ServerSetSlotPacket packet) {
        if (packet.getWindowId() == 255) { //cursor
            GeyserItemStack newItem = GeyserItemStack.from(packet.getItem());
            session.getPlayerInventory().setCursor(newItem, session);
            InventoryUtils.updateCursor(session);
            return;
        }

        //TODO: support window id -2, should update player inventory
        Inventory inventory = InventoryUtils.getInventory(session, packet.getWindowId());
        if (inventory == null)
            return;

        inventory.setStateId(packet.getStateId());

        InventoryTranslator translator = session.getInventoryTranslator();
        if (translator != null) {
            if (session.getCraftingGridFuture() != null) {
                session.getCraftingGridFuture().cancel(false);
            }
            session.setCraftingGridFuture(session.scheduleInEventLoop(() -> updateCraftingGrid(session, packet, inventory, translator), 150, TimeUnit.MILLISECONDS));

            GeyserItemStack newItem = GeyserItemStack.from(packet.getItem());
            if (packet.getWindowId() == 0 && !(translator instanceof PlayerInventoryTranslator)) {
                // In rare cases, the window ID can still be 0 but Java treats it as valid
                session.getPlayerInventory().setItem(packet.getSlot(), newItem, session);
                InventoryTranslator.PLAYER_INVENTORY_TRANSLATOR.updateSlot(session, session.getPlayerInventory(), packet.getSlot());
            } else {
                inventory.setItem(packet.getSlot(), newItem, session);
                translator.updateSlot(session, inventory, packet.getSlot());
            }
        }
    }

    private static void updateCraftingGrid(GeyserSession session, ServerSetSlotPacket packet, Inventory inventory, InventoryTranslator translator) {
        if (packet.getSlot() == 0) {
            int gridSize;
            if (translator instanceof PlayerInventoryTranslator) {
                gridSize = 4;
            } else if (translator instanceof CraftingInventoryTranslator) {
                gridSize = 9;
            } else {
                return;
            }

            if (packet.getItem() == null || packet.getItem().getId() == 0) {
                return;
            }

            int offset = gridSize == 4 ? 28 : 32;
            int gridDimensions = gridSize == 4 ? 2 : 3;
            int firstRow = -1, height = -1;
            int firstCol = -1, width = -1;
            for (int row = 0; row < gridDimensions; row++) {
                for (int col = 0; col < gridDimensions; col++) {
                    if (!inventory.getItem(col + (row * gridDimensions) + 1).isEmpty()) {
                        if (firstRow == -1) {
                            firstRow = row;
                            firstCol = col;
                        } else {
                            firstCol = Math.min(firstCol, col);
                        }
                        height = Math.max(height, row);
                        width = Math.max(width, col);
                    }
                }
            }

            //empty grid
            if (firstRow == -1) {
                return;
            }

            height += -firstRow + 1;
            width += -firstCol + 1;

            recipes:
            for (Recipe recipe : session.getCraftingRecipes().values()) {
                if (recipe.getType() == RecipeType.CRAFTING_SHAPED) {
                    ShapedRecipeData data = (ShapedRecipeData) recipe.getData();
                    if (!data.getResult().equals(packet.getItem())) {
                        continue;
                    }
                    if (data.getWidth() != width || data.getHeight() != height || width * height != data.getIngredients().length) {
                        continue;
                    }

                    Ingredient[] ingredients = data.getIngredients();
                    if (!testShapedRecipe(ingredients, inventory, gridDimensions, firstRow, height, firstCol, width)) {
                        Ingredient[] mirroredIngredients = new Ingredient[data.getIngredients().length];
                        for (int row = 0; row < height; row++) {
                            for (int col = 0; col < width; col++) {
                                mirroredIngredients[col + (row * width)] = ingredients[(width - 1 - col) + (row * width)];
                            }
                        }

                        if (Arrays.equals(ingredients, mirroredIngredients) ||
                                !testShapedRecipe(mirroredIngredients, inventory, gridDimensions, firstRow, height, firstCol, width)) {
                            continue;
                        }
                    }
                    // Recipe is had, don't sent packet
                    return;
                } else if (recipe.getType() == RecipeType.CRAFTING_SHAPELESS) {
                    ShapelessRecipeData data = (ShapelessRecipeData) recipe.getData();
                    if (!data.getResult().equals(packet.getItem())) {
                        continue;
                    }
                    for (int i = 0; i < data.getIngredients().length; i++) {
                        Ingredient ingredient = data.getIngredients()[i];
                        for (ItemStack itemStack : ingredient.getOptions()) {
                            boolean inventoryHasItem = false;
                            for (int j = 0; j < inventory.getSize(); j++) {
                                GeyserItemStack geyserItemStack = inventory.getItem(j);
                                if (geyserItemStack.isEmpty()) {
                                    inventoryHasItem = itemStack == null || itemStack.getId() == 0;
                                    if (inventoryHasItem) {
                                        break;
                                    }
                                } else if (itemStack.equals(geyserItemStack.getItemStack(1))) {
                                    inventoryHasItem = true;
                                    break;
                                }
                            }
                            if (!inventoryHasItem) {
                                continue recipes;
                            }
                        }
                    }
                    // Recipe is had, don't sent packet
                    return;
                }
            }

            UUID uuid = UUID.randomUUID();
            int newRecipeId = session.getLastRecipeNetId().incrementAndGet();

            ItemData[] ingredients = new ItemData[height * width];
            //construct ingredient list and clear slots on client
            Ingredient[] javaIngredients = new Ingredient[height * width];
            int index = 0;
            for (int row = firstRow; row < height + firstRow; row++) {
                for (int col = firstCol; col < width + firstCol; col++) {
                    GeyserItemStack geyserItemStack = inventory.getItem(col + (row * gridDimensions) + 1);
                    ingredients[index] = geyserItemStack.getItemData(session);
                    ItemStack[] itemStacks = new ItemStack[] {geyserItemStack.isEmpty() ? null : geyserItemStack.getItemStack(1)};
                    javaIngredients[index] = new Ingredient(itemStacks);

                    InventorySlotPacket slotPacket = new InventorySlotPacket();
                    slotPacket.setContainerId(ContainerId.UI);
                    slotPacket.setSlot(col + (row * gridDimensions) + offset);
                    slotPacket.setItem(ItemData.AIR);
                    session.sendUpstreamPacket(slotPacket);
                    index++;
                }
            }

            ShapedRecipeData data = new ShapedRecipeData(width, height, "", javaIngredients, packet.getItem());
            // Cache this recipe so we know the client has received it
            session.getCraftingRecipes().put(newRecipeId, new Recipe(RecipeType.CRAFTING_SHAPED, uuid.toString(), data));

            CraftingDataPacket craftPacket = new CraftingDataPacket();
            craftPacket.getCraftingData().add(CraftingData.fromShaped(
                    uuid.toString(),
                    width,
                    height,
                    Arrays.asList(ingredients),
                    Collections.singletonList(ItemTranslator.translateToBedrock(session, packet.getItem())),
                    uuid,
                    "crafting_table",
                    0,
                    newRecipeId
            ));
            craftPacket.setCleanRecipes(false);
            session.sendUpstreamPacket(craftPacket);

            index = 0;
            for (int row = firstRow; row < height + firstRow; row++) {
                for (int col = firstCol; col < width + firstCol; col++) {
                    InventorySlotPacket slotPacket = new InventorySlotPacket();
                    slotPacket.setContainerId(ContainerId.UI);
                    slotPacket.setSlot(col + (row * gridDimensions) + offset);
                    slotPacket.setItem(ingredients[index]);
                    session.sendUpstreamPacket(slotPacket);
                    index++;
                }
            }
        }
    }

    private static boolean testShapedRecipe(Ingredient[] ingredients, Inventory inventory, int gridDimensions, int firstRow, int height, int firstCol, int width) {
        int ingredientIndex = 0;
        for (int row = firstRow; row < height + firstRow; row++) {
            for (int col = firstCol; col < width + firstCol; col++) {
                GeyserItemStack geyserItemStack = inventory.getItem(col + (row * gridDimensions) + 1);
                Ingredient ingredient = ingredients[ingredientIndex++];
                if (ingredient.getOptions().length == 0) {
                    if (!geyserItemStack.isEmpty()) {
                        return false;
                    }
                } else {
                    boolean inventoryHasItem = false;
                    for (ItemStack item : ingredient.getOptions()) {
                        if (Objects.equals(geyserItemStack.getItemStack(1), item)) {
                            inventoryHasItem = true;
                            break;
                        }
                    }
                    if (!inventoryHasItem) {
                        return false;
                    }
                }
            }
        }
        return true;
    }
}