Code/net/minecraft/world/level/block/piston/MovingPistonBlock.java

package net.minecraft.world.level.block.piston;

import com.mojang.serialization.MapCodec;
import java.util.Collections;
import java.util.List;
import javax.annotation.Nullable;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.world.InteractionResult;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.level.BlockGetter;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.LevelAccessor;
import net.minecraft.world.level.LevelReader;
import net.minecraft.world.level.block.BaseEntityBlock;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.Mirror;
import net.minecraft.world.level.block.RenderShape;
import net.minecraft.world.level.block.Rotation;
import net.minecraft.world.level.block.entity.BlockEntity;
import net.minecraft.world.level.block.entity.BlockEntityTicker;
import net.minecraft.world.level.block.entity.BlockEntityType;
import net.minecraft.world.level.block.state.BlockBehaviour;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.block.state.StateDefinition;
import net.minecraft.world.level.block.state.properties.EnumProperty;
import net.minecraft.world.level.block.state.properties.PistonType;
import net.minecraft.world.level.pathfinder.PathComputationType;
import net.minecraft.world.level.storage.loot.LootParams;
import net.minecraft.world.level.storage.loot.parameters.LootContextParams;
import net.minecraft.world.phys.BlockHitResult;
import net.minecraft.world.phys.shapes.CollisionContext;
import net.minecraft.world.phys.shapes.Shapes;
import net.minecraft.world.phys.shapes.VoxelShape;

public class MovingPistonBlock extends BaseEntityBlock {
    public static final MapCodec<MovingPistonBlock> CODEC = simpleCodec(MovingPistonBlock::new);
    public static final EnumProperty<Direction> FACING = PistonHeadBlock.FACING;
    public static final EnumProperty<PistonType> TYPE = PistonHeadBlock.TYPE;

    @Override
    public MapCodec<MovingPistonBlock> codec() {
        return CODEC;
    }

    public MovingPistonBlock(BlockBehaviour.Properties p_60050_) {
        super(p_60050_);
        this.registerDefaultState(this.stateDefinition.any().setValue(FACING, Direction.NORTH).setValue(TYPE, PistonType.DEFAULT));
    }

    @Nullable
    @Override
    public BlockEntity newBlockEntity(BlockPos p_155879_, BlockState p_155880_) {
        return null;
    }

    public static BlockEntity newMovingBlockEntity(
        BlockPos p_155882_, BlockState p_155883_, BlockState p_155884_, Direction p_155885_, boolean p_155886_, boolean p_155887_
    ) {
        return new PistonMovingBlockEntity(p_155882_, p_155883_, p_155884_, p_155885_, p_155886_, p_155887_);
    }

    @Nullable
    @Override
    public <T extends BlockEntity> BlockEntityTicker<T> getTicker(Level p_155875_, BlockState p_155876_, BlockEntityType<T> p_155877_) {
        return createTickerHelper(p_155877_, BlockEntityType.PISTON, PistonMovingBlockEntity::tick);
    }

    @Override
    public void destroy(LevelAccessor p_60061_, BlockPos p_60062_, BlockState p_60063_) {
        BlockPos blockpos = p_60062_.relative(p_60063_.getValue(FACING).getOpposite());
        BlockState blockstate = p_60061_.getBlockState(blockpos);
        if (blockstate.getBlock() instanceof PistonBaseBlock && blockstate.getValue(PistonBaseBlock.EXTENDED)) {
            p_60061_.removeBlock(blockpos, false);
        }
    }

    @Override
    protected InteractionResult useWithoutItem(BlockState p_60070_, Level p_60071_, BlockPos p_60072_, Player p_60073_, BlockHitResult p_60075_) {
        if (!p_60071_.isClientSide && p_60071_.getBlockEntity(p_60072_) == null) {
            p_60071_.removeBlock(p_60072_, false);
            return InteractionResult.CONSUME;
        } else {
            return InteractionResult.PASS;
        }
    }

    @Override
    protected List<ItemStack> getDrops(BlockState p_287650_, LootParams.Builder p_287754_) {
        PistonMovingBlockEntity pistonmovingblockentity = this.getBlockEntity(
            p_287754_.getLevel(), BlockPos.containing(p_287754_.getParameter(LootContextParams.ORIGIN))
        );
        return pistonmovingblockentity == null ? Collections.emptyList() : pistonmovingblockentity.getMovedState().getDrops(p_287754_);
    }

    @Override
    protected VoxelShape getShape(BlockState p_60099_, BlockGetter p_60100_, BlockPos p_60101_, CollisionContext p_60102_) {
        return Shapes.empty();
    }

    @Override
    protected VoxelShape getCollisionShape(BlockState p_60104_, BlockGetter p_60105_, BlockPos p_60106_, CollisionContext p_60107_) {
        PistonMovingBlockEntity pistonmovingblockentity = this.getBlockEntity(p_60105_, p_60106_);
        return pistonmovingblockentity != null ? pistonmovingblockentity.getCollisionShape(p_60105_, p_60106_) : Shapes.empty();
    }

    @Nullable
    private PistonMovingBlockEntity getBlockEntity(BlockGetter p_60054_, BlockPos p_60055_) {
        BlockEntity blockentity = p_60054_.getBlockEntity(p_60055_);
        return blockentity instanceof PistonMovingBlockEntity ? (PistonMovingBlockEntity)blockentity : null;
    }

    @Override
    protected RenderShape getRenderShape(BlockState p_377730_) {
        return RenderShape.INVISIBLE;
    }

    @Override
    protected ItemStack getCloneItemStack(LevelReader p_309808_, BlockPos p_60058_, BlockState p_60059_, boolean p_376538_) {
        return ItemStack.EMPTY;
    }

    @Override
    protected BlockState rotate(BlockState p_60086_, Rotation p_60087_) {
        return p_60086_.setValue(FACING, p_60087_.rotate(p_60086_.getValue(FACING)));
    }

    @Override
    protected BlockState mirror(BlockState p_60083_, Mirror p_60084_) {
        return p_60083_.rotate(p_60084_.getRotation(p_60083_.getValue(FACING)));
    }

    @Override
    protected void createBlockStateDefinition(StateDefinition.Builder<Block, BlockState> p_60097_) {
        p_60097_.add(FACING, TYPE);
    }

    @Override
    protected boolean isPathfindable(BlockState p_60065_, PathComputationType p_60068_) {
        return false;
    }
}