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

package net.minecraft.world.level.block;

import com.mojang.serialization.MapCodec;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.util.RandomSource;
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.IntegerProperty;
import net.minecraft.world.level.material.Fluids;
import net.minecraft.world.phys.shapes.VoxelShape;

public abstract class GrowingPlantHeadBlock extends GrowingPlantBlock implements BonemealableBlock {
	public static final IntegerProperty AGE = BlockStateProperties.AGE_25;
	public static final int MAX_AGE = 25;
	private final double growPerTickProbability;

	protected GrowingPlantHeadBlock(
		BlockBehaviour.Properties properties, Direction growthDirection, VoxelShape shape, boolean scheduleFluidTicks, double growPerTickProbability
	) {
		super(properties, growthDirection, shape, scheduleFluidTicks);
		this.growPerTickProbability = growPerTickProbability;
		this.registerDefaultState(this.stateDefinition.any().setValue(AGE, 0));
	}

	@Override
	protected abstract MapCodec<? extends GrowingPlantHeadBlock> codec();

	@Override
	public BlockState getStateForPlacement(RandomSource random) {
		return this.defaultBlockState().setValue(AGE, random.nextInt(25));
	}

	@Override
	protected boolean isRandomlyTicking(BlockState state) {
		return (Integer)state.getValue(AGE) < 25;
	}

	@Override
	protected void randomTick(BlockState state, ServerLevel level, BlockPos pos, RandomSource random) {
		if ((Integer)state.getValue(AGE) < 25 && random.nextDouble() < this.growPerTickProbability) {
			BlockPos blockPos = pos.relative(this.growthDirection);
			if (this.canGrowInto(level.getBlockState(blockPos))) {
				level.setBlockAndUpdate(blockPos, this.getGrowIntoState(state, level.random));
			}
		}
	}

	protected BlockState getGrowIntoState(BlockState state, RandomSource random) {
		return state.cycle(AGE);
	}

	public BlockState getMaxAgeState(BlockState state) {
		return state.setValue(AGE, 25);
	}

	public boolean isMaxAge(BlockState state) {
		return (Integer)state.getValue(AGE) == 25;
	}

	protected BlockState updateBodyAfterConvertedFromHead(BlockState head, BlockState body) {
		return body;
	}

	@Override
	protected BlockState updateShape(
		BlockState state,
		LevelReader level,
		ScheduledTickAccess scheduledTickAccess,
		BlockPos pos,
		Direction direction,
		BlockPos neighborPos,
		BlockState neighborState,
		RandomSource random
	) {
		if (direction == this.growthDirection.getOpposite()) {
			if (!state.canSurvive(level, pos)) {
				scheduledTickAccess.scheduleTick(pos, this, 1);
			} else {
				BlockState blockState = level.getBlockState(pos.relative(this.growthDirection));
				if (blockState.is(this) || blockState.is(this.getBodyBlock())) {
					return this.updateBodyAfterConvertedFromHead(state, this.getBodyBlock().defaultBlockState());
				}
			}
		}

		if (direction != this.growthDirection || !neighborState.is(this) && !neighborState.is(this.getBodyBlock())) {
			if (this.scheduleFluidTicks) {
				scheduledTickAccess.scheduleTick(pos, Fluids.WATER, Fluids.WATER.getTickDelay(level));
			}

			return super.updateShape(state, level, scheduledTickAccess, pos, direction, neighborPos, neighborState, random);
		} else {
			return this.updateBodyAfterConvertedFromHead(state, this.getBodyBlock().defaultBlockState());
		}
	}

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

	@Override
	public boolean isValidBonemealTarget(LevelReader level, BlockPos pos, BlockState state) {
		return this.canGrowInto(level.getBlockState(pos.relative(this.growthDirection)));
	}

	@Override
	public boolean isBonemealSuccess(Level level, RandomSource random, BlockPos pos, BlockState state) {
		return true;
	}

	@Override
	public void performBonemeal(ServerLevel level, RandomSource random, BlockPos pos, BlockState state) {
		BlockPos blockPos = pos.relative(this.growthDirection);
		int i = Math.min((Integer)state.getValue(AGE) + 1, 25);
		int j = this.getBlocksToGrowWhenBonemealed(random);

		for (int k = 0; k < j && this.canGrowInto(level.getBlockState(blockPos)); k++) {
			level.setBlockAndUpdate(blockPos, state.setValue(AGE, i));
			blockPos = blockPos.relative(this.growthDirection);
			i = Math.min(i + 1, 25);
		}
	}

	protected abstract int getBlocksToGrowWhenBonemealed(RandomSource random);

	protected abstract boolean canGrowInto(BlockState state);

	@Override
	protected GrowingPlantHeadBlock getHeadBlock() {
		return this;
	}
}