Geyser/core/src/main/java/org/geysermc/geyser/translator/level/block/entity/DoubleChestBlockEntityTranslator.java

/*
 * Copyright (c) 2019-2022 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.geyser.translator.level.block.entity;

import org.cloudburstmc.math.vector.Vector3i;
import org.cloudburstmc.nbt.NbtMap;
import org.cloudburstmc.nbt.NbtMapBuilder;
import org.geysermc.geyser.level.block.BlockStateValues;
import org.geysermc.geyser.level.block.DoubleChestValue;
import org.geysermc.geyser.session.GeyserSession;
import org.geysermc.geyser.util.BlockEntityUtils;
import org.geysermc.mcprotocollib.protocol.data.game.level.block.BlockEntityType;

/**
 * Chests have more block entity properties in Bedrock, which is solved by implementing the BedrockOnlyBlockEntity
 */
@BlockEntity(type = { BlockEntityType.CHEST, BlockEntityType.TRAPPED_CHEST })
public class DoubleChestBlockEntityTranslator extends BlockEntityTranslator implements BedrockOnlyBlockEntity {
    @Override
    public boolean isBlock(int blockState) {
        return BlockStateValues.getDoubleChestValues().containsKey(blockState);
    }

    @Override
    public void updateBlock(GeyserSession session, int blockState, Vector3i position) {
        NbtMapBuilder tagBuilder = getConstantBedrockTag(BlockEntityUtils.getBedrockBlockEntityId(BlockEntityType.CHEST), position.getX(), position.getY(), position.getZ());
        translateTag(session, tagBuilder, null, blockState);
        BlockEntityUtils.updateBlockEntity(session, tagBuilder.build(), position);
    }

    @Override
    public void translateTag(GeyserSession session, NbtMapBuilder bedrockNbt, NbtMap javaNbt, int blockState) {
        DoubleChestValue chestValues = BlockStateValues.getDoubleChestValues().get(blockState);
        if (chestValues != null) {
            int x = (int) bedrockNbt.get("x");
            int z = (int) bedrockNbt.get("z");
            translateChestValue(bedrockNbt, chestValues, x, z);
        }
    }

    /**
     * Add Bedrock block entity tags to a NbtMap based on Java properties
     *
     * @param builder the NbtMapBuilder to apply properties to
     * @param chestValues the position properties of this double chest
     * @param x the x position of this chest pair
     * @param z the z position of this chest pair
     */
    public static void translateChestValue(NbtMapBuilder builder, DoubleChestValue chestValues, int x, int z) {
        // Calculate the position of the other chest based on the Java block state
        if (chestValues.isFacingEast()) {
            if (chestValues.isDirectionPositive()) {
                // East
                z = z + (chestValues.isLeft() ? 1 : -1);
            } else {
                // West
                z = z + (chestValues.isLeft() ? -1 : 1);
            }
        } else {
            if (chestValues.isDirectionPositive()) {
                // South
                x = x + (chestValues.isLeft() ? -1 : 1);
            } else {
                // North
                x = x + (chestValues.isLeft() ? 1 : -1);
            }
        }
        builder.putInt("pairx", x);
        builder.putInt("pairz", z);
        if (!chestValues.isLeft()) {
            builder.putInt("pairlead", (byte) 1);
        }
    }
}