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

package net.minecraft.world.level.block;

import com.mojang.serialization.MapCodec;
import java.util.function.ToIntFunction;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.core.component.DataComponents;
import net.minecraft.util.RandomSource;
import net.minecraft.world.InteractionResult;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.Items;
import net.minecraft.world.item.component.BlockItemStateProperties;
import net.minecraft.world.level.BlockGetter;
import net.minecraft.world.level.Level;
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.block.state.properties.IntegerProperty;
import net.minecraft.world.level.material.FluidState;
import net.minecraft.world.level.material.Fluids;
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 LightBlock extends Block implements SimpleWaterloggedBlock {
    public static final MapCodec<LightBlock> CODEC = simpleCodec(LightBlock::new);
    public static final int MAX_LEVEL = 15;
    public static final IntegerProperty LEVEL = BlockStateProperties.LEVEL;
    public static final BooleanProperty WATERLOGGED = BlockStateProperties.WATERLOGGED;
    public static final ToIntFunction<BlockState> LIGHT_EMISSION = p_153701_ -> p_153701_.getValue(LEVEL);

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

    public LightBlock(BlockBehaviour.Properties p_153662_) {
        super(p_153662_);
        this.registerDefaultState(this.stateDefinition.any().setValue(LEVEL, 15).setValue(WATERLOGGED, false));
    }

    @Override
    protected void createBlockStateDefinition(StateDefinition.Builder<Block, BlockState> p_153687_) {
        p_153687_.add(LEVEL, WATERLOGGED);
    }

    @Override
    protected InteractionResult useWithoutItem(BlockState p_153673_, Level p_153674_, BlockPos p_153675_, Player p_153676_, BlockHitResult p_153678_) {
        if (!p_153674_.isClientSide && p_153676_.canUseGameMasterBlocks()) {
            p_153674_.setBlock(p_153675_, p_153673_.cycle(LEVEL), 2);
            return InteractionResult.SUCCESS_SERVER;
        } else {
            return InteractionResult.CONSUME;
        }
    }

    @Override
    protected VoxelShape getShape(BlockState p_153668_, BlockGetter p_153669_, BlockPos p_153670_, CollisionContext p_153671_) {
        return p_153671_.isHoldingItem(Items.LIGHT) ? Shapes.block() : Shapes.empty();
    }

    @Override
    protected boolean propagatesSkylightDown(BlockState p_153695_) {
        return p_153695_.getFluidState().isEmpty();
    }

    @Override
    protected RenderShape getRenderShape(BlockState p_153693_) {
        return RenderShape.INVISIBLE;
    }

    @Override
    protected float getShadeBrightness(BlockState p_153689_, BlockGetter p_153690_, BlockPos p_153691_) {
        return 1.0F;
    }

    @Override
    protected BlockState updateShape(
        BlockState p_153680_,
        LevelReader p_367699_,
        ScheduledTickAccess p_366283_,
        BlockPos p_153684_,
        Direction p_153681_,
        BlockPos p_153685_,
        BlockState p_153682_,
        RandomSource p_361423_
    ) {
        if (p_153680_.getValue(WATERLOGGED)) {
            p_366283_.scheduleTick(p_153684_, Fluids.WATER, Fluids.WATER.getTickDelay(p_367699_));
        }

        return super.updateShape(p_153680_, p_367699_, p_366283_, p_153684_, p_153681_, p_153685_, p_153682_, p_361423_);
    }

    @Override
    protected FluidState getFluidState(BlockState p_153699_) {
        return p_153699_.getValue(WATERLOGGED) ? Fluids.WATER.getSource(false) : super.getFluidState(p_153699_);
    }

    @Override
    protected ItemStack getCloneItemStack(LevelReader p_310734_, BlockPos p_153665_, BlockState p_153666_, boolean p_375572_) {
        return setLightOnStack(super.getCloneItemStack(p_310734_, p_153665_, p_153666_, p_375572_), p_153666_.getValue(LEVEL));
    }

    public static ItemStack setLightOnStack(ItemStack p_259339_, int p_259353_) {
        p_259339_.set(DataComponents.BLOCK_STATE, BlockItemStateProperties.EMPTY.with(LEVEL, p_259353_));
        return p_259339_;
    }
}