minecraft-src/net/minecraft/world/level/block/CandleCakeBlock.java

package net.minecraft.world.level.block;

import com.google.common.collect.Maps;
import com.mojang.serialization.MapCodec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import java.util.List;
import java.util.Map;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.core.registries.BuiltInRegistries;
import net.minecraft.tags.BlockTags;
import net.minecraft.util.RandomSource;
import net.minecraft.world.InteractionHand;
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.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.Builder;
import net.minecraft.world.level.block.state.properties.BooleanProperty;
import net.minecraft.world.level.pathfinder.PathComputationType;
import net.minecraft.world.phys.BlockHitResult;
import net.minecraft.world.phys.Vec3;
import net.minecraft.world.phys.shapes.CollisionContext;
import net.minecraft.world.phys.shapes.Shapes;
import net.minecraft.world.phys.shapes.VoxelShape;

public class CandleCakeBlock extends AbstractCandleBlock {
	public static final MapCodec<CandleCakeBlock> CODEC = RecordCodecBuilder.mapCodec(
		instance -> instance.group(
				BuiltInRegistries.BLOCK.byNameCodec().fieldOf("candle").forGetter(candleCakeBlock -> candleCakeBlock.candleBlock), propertiesCodec()
			)
			.apply(instance, CandleCakeBlock::new)
	);
	public static final BooleanProperty LIT = AbstractCandleBlock.LIT;
	private static final VoxelShape SHAPE = Shapes.or(Block.column(2.0, 8.0, 14.0), Block.column(14.0, 0.0, 8.0));
	private static final Map<CandleBlock, CandleCakeBlock> BY_CANDLE = Maps.<CandleBlock, CandleCakeBlock>newHashMap();
	private static final Iterable<Vec3> PARTICLE_OFFSETS = List.of(new Vec3(8.0, 16.0, 8.0).scale(0.0625));
	private final CandleBlock candleBlock;

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

	protected CandleCakeBlock(Block candleBlock, BlockBehaviour.Properties properties) {
		super(properties);
		this.registerDefaultState(this.stateDefinition.any().setValue(LIT, false));
		if (candleBlock instanceof CandleBlock candleBlock2) {
			BY_CANDLE.put(candleBlock2, this);
			this.candleBlock = candleBlock2;
		} else {
			throw new IllegalArgumentException("Expected block to be of " + CandleBlock.class + " was " + candleBlock.getClass());
		}
	}

	@Override
	protected Iterable<Vec3> getParticleOffsets(BlockState state) {
		return PARTICLE_OFFSETS;
	}

	@Override
	protected VoxelShape getShape(BlockState state, BlockGetter level, BlockPos pos, CollisionContext context) {
		return SHAPE;
	}

	@Override
	protected InteractionResult useItemOn(
		ItemStack stack, BlockState state, Level level, BlockPos pos, Player player, InteractionHand hand, BlockHitResult hitResult
	) {
		if (stack.is(Items.FLINT_AND_STEEL) || stack.is(Items.FIRE_CHARGE)) {
			return InteractionResult.PASS;
		} else if (candleHit(hitResult) && stack.isEmpty() && (Boolean)state.getValue(LIT)) {
			extinguish(player, state, level, pos);
			return InteractionResult.SUCCESS;
		} else {
			return super.useItemOn(stack, state, level, pos, player, hand, hitResult);
		}
	}

	@Override
	protected InteractionResult useWithoutItem(BlockState state, Level level, BlockPos pos, Player player, BlockHitResult hitResult) {
		InteractionResult interactionResult = CakeBlock.eat(level, pos, Blocks.CAKE.defaultBlockState(), player);
		if (interactionResult.consumesAction()) {
			dropResources(state, level, pos);
		}

		return interactionResult;
	}

	private static boolean candleHit(BlockHitResult hit) {
		return hit.getLocation().y - hit.getBlockPos().getY() > 0.5;
	}

	@Override
	protected void createBlockStateDefinition(Builder<Block, BlockState> builder) {
		builder.add(LIT);
	}

	@Override
	protected ItemStack getCloneItemStack(LevelReader level, BlockPos pos, BlockState state, boolean includeData) {
		return new ItemStack(Blocks.CAKE);
	}

	@Override
	protected BlockState updateShape(
		BlockState state,
		LevelReader level,
		ScheduledTickAccess scheduledTickAccess,
		BlockPos pos,
		Direction direction,
		BlockPos neighborPos,
		BlockState neighborState,
		RandomSource random
	) {
		return direction == Direction.DOWN && !state.canSurvive(level, pos)
			? Blocks.AIR.defaultBlockState()
			: super.updateShape(state, level, scheduledTickAccess, pos, direction, neighborPos, neighborState, random);
	}

	@Override
	protected boolean canSurvive(BlockState state, LevelReader level, BlockPos pos) {
		return level.getBlockState(pos.below()).isSolid();
	}

	@Override
	protected int getAnalogOutputSignal(BlockState state, Level level, BlockPos pos) {
		return CakeBlock.FULL_CAKE_SIGNAL;
	}

	@Override
	protected boolean hasAnalogOutputSignal(BlockState state) {
		return true;
	}

	@Override
	protected boolean isPathfindable(BlockState state, PathComputationType pathComputationType) {
		return false;
	}

	public static BlockState byCandle(CandleBlock candle) {
		return ((CandleCakeBlock)BY_CANDLE.get(candle)).defaultBlockState();
	}

	public static boolean canLight(BlockState state) {
		return state.is(BlockTags.CANDLE_CAKES, blockStateBase -> blockStateBase.hasProperty(LIT) && !(Boolean)state.getValue(LIT));
	}
}