Code/net/minecraft/world/item/BucketItem.java

package net.minecraft.world.item;

import javax.annotation.Nullable;
import net.minecraft.advancements.CriteriaTriggers;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.core.particles.ParticleTypes;
import net.minecraft.server.level.ServerPlayer;
import net.minecraft.sounds.SoundEvent;
import net.minecraft.sounds.SoundEvents;
import net.minecraft.sounds.SoundSource;
import net.minecraft.stats.Stats;
import net.minecraft.tags.FluidTags;
import net.minecraft.world.InteractionHand;
import net.minecraft.world.InteractionResult;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.level.ClipContext;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.LevelAccessor;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.BucketPickup;
import net.minecraft.world.level.block.LiquidBlockContainer;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.gameevent.GameEvent;
import net.minecraft.world.level.material.FlowingFluid;
import net.minecraft.world.level.material.Fluid;
import net.minecraft.world.level.material.Fluids;
import net.minecraft.world.phys.BlockHitResult;
import net.minecraft.world.phys.HitResult;

public class BucketItem extends Item implements DispensibleContainerItem {
    private final Fluid content;

    public BucketItem(Fluid p_40689_, Item.Properties p_40690_) {
        super(p_40690_);
        this.content = p_40689_;
    }

    @Override
    public InteractionResult use(Level p_40703_, Player p_40704_, InteractionHand p_40705_) {
        ItemStack itemstack = p_40704_.getItemInHand(p_40705_);
        BlockHitResult blockhitresult = getPlayerPOVHitResult(p_40703_, p_40704_, this.content == Fluids.EMPTY ? ClipContext.Fluid.SOURCE_ONLY : ClipContext.Fluid.NONE);
        if (blockhitresult.getType() == HitResult.Type.MISS) {
            return InteractionResult.PASS;
        } else if (blockhitresult.getType() != HitResult.Type.BLOCK) {
            return InteractionResult.PASS;
        } else {
            BlockPos blockpos = blockhitresult.getBlockPos();
            Direction direction = blockhitresult.getDirection();
            BlockPos blockpos1 = blockpos.relative(direction);
            if (!p_40703_.mayInteract(p_40704_, blockpos) || !p_40704_.mayUseItemAt(blockpos1, direction, itemstack)) {
                return InteractionResult.FAIL;
            } else if (this.content == Fluids.EMPTY) {
                BlockState blockstate1 = p_40703_.getBlockState(blockpos);
                if (blockstate1.getBlock() instanceof BucketPickup bucketpickup) {
                    ItemStack itemstack3 = bucketpickup.pickupBlock(p_40704_, p_40703_, blockpos, blockstate1);
                    if (!itemstack3.isEmpty()) {
                        p_40704_.awardStat(Stats.ITEM_USED.get(this));
                        bucketpickup.getPickupSound().ifPresent(p_150709_ -> p_40704_.playSound(p_150709_, 1.0F, 1.0F));
                        p_40703_.gameEvent(p_40704_, GameEvent.FLUID_PICKUP, blockpos);
                        ItemStack itemstack2 = ItemUtils.createFilledResult(itemstack, p_40704_, itemstack3);
                        if (!p_40703_.isClientSide) {
                            CriteriaTriggers.FILLED_BUCKET.trigger((ServerPlayer)p_40704_, itemstack3);
                        }

                        return InteractionResult.SUCCESS.heldItemTransformedTo(itemstack2);
                    }
                }

                return InteractionResult.FAIL;
            } else {
                BlockState blockstate = p_40703_.getBlockState(blockpos);
                BlockPos blockpos2 = blockstate.getBlock() instanceof LiquidBlockContainer && this.content == Fluids.WATER ? blockpos : blockpos1;
                if (this.emptyContents(p_40704_, p_40703_, blockpos2, blockhitresult)) {
                    this.checkExtraContent(p_40704_, p_40703_, itemstack, blockpos2);
                    if (p_40704_ instanceof ServerPlayer) {
                        CriteriaTriggers.PLACED_BLOCK.trigger((ServerPlayer)p_40704_, blockpos2, itemstack);
                    }

                    p_40704_.awardStat(Stats.ITEM_USED.get(this));
                    ItemStack itemstack1 = ItemUtils.createFilledResult(itemstack, p_40704_, getEmptySuccessItem(itemstack, p_40704_));
                    return InteractionResult.SUCCESS.heldItemTransformedTo(itemstack1);
                } else {
                    return InteractionResult.FAIL;
                }
            }
        }
    }

    public static ItemStack getEmptySuccessItem(ItemStack p_40700_, Player p_40701_) {
        return !p_40701_.hasInfiniteMaterials() ? new ItemStack(Items.BUCKET) : p_40700_;
    }

    @Override
    public void checkExtraContent(@Nullable LivingEntity p_397951_, Level p_150712_, ItemStack p_150713_, BlockPos p_150714_) {
    }

    @Override
    public boolean emptyContents(@Nullable LivingEntity p_392717_, Level p_150717_, BlockPos p_150718_, @Nullable BlockHitResult p_150719_) {
        if (!(this.content instanceof FlowingFluid flowingfluid)) {
            return false;
        } else {
            BlockState blockstate = p_150717_.getBlockState(p_150718_);
            Block $$7 = blockstate.getBlock();
            boolean $$8 = blockstate.canBeReplaced(this.content);
            boolean flag1 = blockstate.isAir()
                || $$8
                || $$7 instanceof LiquidBlockContainer liquidblockcontainer
                    && liquidblockcontainer.canPlaceLiquid(p_392717_, p_150717_, p_150718_, blockstate, this.content);
            if (!flag1) {
                return p_150719_ != null && this.emptyContents(p_392717_, p_150717_, p_150719_.getBlockPos().relative(p_150719_.getDirection()), null);
            } else if (p_150717_.dimensionType().ultraWarm() && this.content.is(FluidTags.WATER)) {
                int l = p_150718_.getX();
                int i = p_150718_.getY();
                int j = p_150718_.getZ();
                p_150717_.playSound(
                    p_392717_,
                    p_150718_,
                    SoundEvents.FIRE_EXTINGUISH,
                    SoundSource.BLOCKS,
                    0.5F,
                    2.6F + (p_150717_.random.nextFloat() - p_150717_.random.nextFloat()) * 0.8F
                );

                for (int k = 0; k < 8; k++) {
                    p_150717_.addParticle(ParticleTypes.LARGE_SMOKE, l + Math.random(), i + Math.random(), j + Math.random(), 0.0, 0.0, 0.0);
                }

                return true;
            } else if ($$7 instanceof LiquidBlockContainer liquidblockcontainer1 && this.content == Fluids.WATER) {
                liquidblockcontainer1.placeLiquid(p_150717_, p_150718_, blockstate, flowingfluid.getSource(false));
                this.playEmptySound(p_392717_, p_150717_, p_150718_);
                return true;
            } else {
                if (!p_150717_.isClientSide && $$8 && !blockstate.liquid()) {
                    p_150717_.destroyBlock(p_150718_, true);
                }

                if (!p_150717_.setBlock(p_150718_, this.content.defaultFluidState().createLegacyBlock(), 11) && !blockstate.getFluidState().isSource()) {
                    return false;
                } else {
                    this.playEmptySound(p_392717_, p_150717_, p_150718_);
                    return true;
                }
            }
        }
    }

    protected void playEmptySound(@Nullable LivingEntity p_393933_, LevelAccessor p_40697_, BlockPos p_40698_) {
        SoundEvent soundevent = this.content.is(FluidTags.LAVA) ? SoundEvents.BUCKET_EMPTY_LAVA : SoundEvents.BUCKET_EMPTY;
        p_40697_.playSound(p_393933_, p_40698_, soundevent, SoundSource.BLOCKS, 1.0F, 1.0F);
        p_40697_.gameEvent(p_393933_, GameEvent.FLUID_PLACE, p_40698_);
    }
}