minecraft-src/net/minecraft/world/item/BoneMealItem.java

package net.minecraft.world.item;

import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.core.Holder;
import net.minecraft.core.particles.ParticleTypes;
import net.minecraft.core.registries.BuiltInRegistries;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.tags.BiomeTags;
import net.minecraft.tags.BlockTags;
import net.minecraft.util.ParticleUtils;
import net.minecraft.util.RandomSource;
import net.minecraft.world.InteractionResult;
import net.minecraft.world.item.context.UseOnContext;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.LevelAccessor;
import net.minecraft.world.level.biome.Biome;
import net.minecraft.world.level.block.BaseCoralWallFanBlock;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.level.block.BonemealableBlock;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.gameevent.GameEvent;
import org.jetbrains.annotations.Nullable;

public class BoneMealItem extends Item {
	public static final int GRASS_SPREAD_WIDTH = 3;
	public static final int GRASS_SPREAD_HEIGHT = 1;
	public static final int GRASS_COUNT_MULTIPLIER = 3;

	public BoneMealItem(Item.Properties properties) {
		super(properties);
	}

	@Override
	public InteractionResult useOn(UseOnContext context) {
		Level level = context.getLevel();
		BlockPos blockPos = context.getClickedPos();
		BlockPos blockPos2 = blockPos.relative(context.getClickedFace());
		if (growCrop(context.getItemInHand(), level, blockPos)) {
			if (!level.isClientSide) {
				context.getPlayer().gameEvent(GameEvent.ITEM_INTERACT_FINISH);
				level.levelEvent(1505, blockPos, 15);
			}

			return InteractionResult.SUCCESS;
		} else {
			BlockState blockState = level.getBlockState(blockPos);
			boolean bl = blockState.isFaceSturdy(level, blockPos, context.getClickedFace());
			if (bl && growWaterPlant(context.getItemInHand(), level, blockPos2, context.getClickedFace())) {
				if (!level.isClientSide) {
					context.getPlayer().gameEvent(GameEvent.ITEM_INTERACT_FINISH);
					level.levelEvent(1505, blockPos2, 15);
				}

				return InteractionResult.SUCCESS;
			} else {
				return InteractionResult.PASS;
			}
		}
	}

	public static boolean growCrop(ItemStack stack, Level level, BlockPos pos) {
		BlockState blockState = level.getBlockState(pos);
		if (blockState.getBlock() instanceof BonemealableBlock bonemealableBlock && bonemealableBlock.isValidBonemealTarget(level, pos, blockState)) {
			if (level instanceof ServerLevel) {
				if (bonemealableBlock.isBonemealSuccess(level, level.random, pos, blockState)) {
					bonemealableBlock.performBonemeal((ServerLevel)level, level.random, pos, blockState);
				}

				stack.shrink(1);
			}

			return true;
		} else {
			return false;
		}
	}

	public static boolean growWaterPlant(ItemStack stack, Level level, BlockPos pos, @Nullable Direction clickedSide) {
		if (level.getBlockState(pos).is(Blocks.WATER) && level.getFluidState(pos).getAmount() == 8) {
			if (!(level instanceof ServerLevel)) {
				return true;
			} else {
				RandomSource randomSource = level.getRandom();

				label80:
				for (int i = 0; i < 128; i++) {
					BlockPos blockPos = pos;
					BlockState blockState = Blocks.SEAGRASS.defaultBlockState();

					for (int j = 0; j < i / 16; j++) {
						blockPos = blockPos.offset(randomSource.nextInt(3) - 1, (randomSource.nextInt(3) - 1) * randomSource.nextInt(3) / 2, randomSource.nextInt(3) - 1);
						if (level.getBlockState(blockPos).isCollisionShapeFullBlock(level, blockPos)) {
							continue label80;
						}
					}

					Holder<Biome> holder = level.getBiome(blockPos);
					if (holder.is(BiomeTags.PRODUCES_CORALS_FROM_BONEMEAL)) {
						if (i == 0 && clickedSide != null && clickedSide.getAxis().isHorizontal()) {
							blockState = (BlockState)BuiltInRegistries.BLOCK
								.getRandomElementOf(BlockTags.WALL_CORALS, level.random)
								.map(holderx -> ((Block)holderx.value()).defaultBlockState())
								.orElse(blockState);
							if (blockState.hasProperty(BaseCoralWallFanBlock.FACING)) {
								blockState = blockState.setValue(BaseCoralWallFanBlock.FACING, clickedSide);
							}
						} else if (randomSource.nextInt(4) == 0) {
							blockState = (BlockState)BuiltInRegistries.BLOCK
								.getRandomElementOf(BlockTags.UNDERWATER_BONEMEALS, level.random)
								.map(holderx -> ((Block)holderx.value()).defaultBlockState())
								.orElse(blockState);
						}
					}

					if (blockState.is(BlockTags.WALL_CORALS, blockStateBase -> blockStateBase.hasProperty(BaseCoralWallFanBlock.FACING))) {
						for (int k = 0; !blockState.canSurvive(level, blockPos) && k < 4; k++) {
							blockState = blockState.setValue(BaseCoralWallFanBlock.FACING, Direction.Plane.HORIZONTAL.getRandomDirection(randomSource));
						}
					}

					if (blockState.canSurvive(level, blockPos)) {
						BlockState blockState2 = level.getBlockState(blockPos);
						if (blockState2.is(Blocks.WATER) && level.getFluidState(blockPos).getAmount() == 8) {
							level.setBlock(blockPos, blockState, 3);
						} else if (blockState2.is(Blocks.SEAGRASS)
							&& ((BonemealableBlock)Blocks.SEAGRASS).isValidBonemealTarget(level, blockPos, blockState2)
							&& randomSource.nextInt(10) == 0) {
							((BonemealableBlock)Blocks.SEAGRASS).performBonemeal((ServerLevel)level, randomSource, blockPos, blockState2);
						}
					}
				}

				stack.shrink(1);
				return true;
			}
		} else {
			return false;
		}
	}

	public static void addGrowthParticles(LevelAccessor level, BlockPos pos, int data) {
		BlockState blockState = level.getBlockState(pos);
		if (blockState.getBlock() instanceof BonemealableBlock bonemealableBlock) {
			BlockPos blockPos = bonemealableBlock.getParticlePos(pos);
			switch (bonemealableBlock.getType()) {
				case NEIGHBOR_SPREADER:
					ParticleUtils.spawnParticles(level, blockPos, data * 3, 3.0, 1.0, false, ParticleTypes.HAPPY_VILLAGER);
					break;
				case GROWER:
					ParticleUtils.spawnParticleInBlock(level, blockPos, data, ParticleTypes.HAPPY_VILLAGER);
			}
		} else if (blockState.is(Blocks.WATER)) {
			ParticleUtils.spawnParticles(level, pos, data * 3, 3.0, 1.0, false, ParticleTypes.HAPPY_VILLAGER);
		}
	}
}