Code/net/minecraft/world/level/block/BarrierBlock.java

package net.minecraft.world.level.block;

import com.mojang.serialization.MapCodec;
import javax.annotation.Nullable;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.util.RandomSource;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.context.BlockPlaceContext;
import net.minecraft.world.level.BlockGetter;
import net.minecraft.world.level.LevelAccessor;
import net.minecraft.world.level.LevelReader;
import net.minecraft.world.level.ScheduledTickAccess;
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.BlockStateProperties;
import net.minecraft.world.level.block.state.properties.BooleanProperty;
import net.minecraft.world.level.material.Fluid;
import net.minecraft.world.level.material.FluidState;
import net.minecraft.world.level.material.Fluids;

public class BarrierBlock extends Block implements SimpleWaterloggedBlock {
    public static final MapCodec<BarrierBlock> CODEC = simpleCodec(BarrierBlock::new);
    public static final BooleanProperty WATERLOGGED = BlockStateProperties.WATERLOGGED;

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

    protected BarrierBlock(BlockBehaviour.Properties p_49092_) {
        super(p_49092_);
        this.registerDefaultState(this.defaultBlockState().setValue(WATERLOGGED, false));
    }

    @Override
    protected boolean propagatesSkylightDown(BlockState p_49100_) {
        return p_49100_.getFluidState().isEmpty();
    }

    @Override
    protected RenderShape getRenderShape(BlockState p_49098_) {
        return RenderShape.INVISIBLE;
    }

    @Override
    protected float getShadeBrightness(BlockState p_49094_, BlockGetter p_49095_, BlockPos p_49096_) {
        return 1.0F;
    }

    @Override
    protected BlockState updateShape(
        BlockState p_298183_,
        LevelReader p_368824_,
        ScheduledTickAccess p_364556_,
        BlockPos p_297885_,
        Direction p_298685_,
        BlockPos p_299701_,
        BlockState p_298648_,
        RandomSource p_365489_
    ) {
        if (p_298183_.getValue(WATERLOGGED)) {
            p_364556_.scheduleTick(p_297885_, Fluids.WATER, Fluids.WATER.getTickDelay(p_368824_));
        }

        return super.updateShape(p_298183_, p_368824_, p_364556_, p_297885_, p_298685_, p_299701_, p_298648_, p_365489_);
    }

    @Override
    protected FluidState getFluidState(BlockState p_301306_) {
        return p_301306_.getValue(WATERLOGGED) ? Fluids.WATER.getSource(false) : super.getFluidState(p_301306_);
    }

    @Nullable
    @Override
    public BlockState getStateForPlacement(BlockPlaceContext p_298919_) {
        return this.defaultBlockState().setValue(WATERLOGGED, p_298919_.getLevel().getFluidState(p_298919_.getClickedPos()).getType() == Fluids.WATER);
    }

    @Override
    protected void createBlockStateDefinition(StateDefinition.Builder<Block, BlockState> p_297868_) {
        p_297868_.add(WATERLOGGED);
    }

    @Override
    public ItemStack pickupBlock(@Nullable LivingEntity p_394107_, LevelAccessor p_299225_, BlockPos p_298270_, BlockState p_298275_) {
        return p_394107_ instanceof Player player && player.isCreative()
            ? SimpleWaterloggedBlock.super.pickupBlock(p_394107_, p_299225_, p_298270_, p_298275_)
            : ItemStack.EMPTY;
    }

    @Override
    public boolean canPlaceLiquid(@Nullable LivingEntity p_396046_, BlockGetter p_299765_, BlockPos p_297382_, BlockState p_299344_, Fluid p_299153_) {
        return p_396046_ instanceof Player player && player.isCreative()
            ? SimpleWaterloggedBlock.super.canPlaceLiquid(p_396046_, p_299765_, p_297382_, p_299344_, p_299153_)
            : false;
    }
}