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

package net.minecraft.world.level.block;

import com.mojang.serialization.MapCodec;
import net.minecraft.core.BlockPos;
import net.minecraft.network.chat.Component;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.sounds.SoundEvents;
import net.minecraft.sounds.SoundSource;
import net.minecraft.stats.Stats;
import net.minecraft.world.InteractionHand;
import net.minecraft.world.InteractionResult;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.item.PrimedTnt;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.entity.projectile.Projectile;
import net.minecraft.world.item.Item;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.Items;
import net.minecraft.world.level.Explosion;
import net.minecraft.world.level.GameRules;
import net.minecraft.world.level.Level;
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.BlockStateProperties;
import net.minecraft.world.level.block.state.properties.BooleanProperty;
import net.minecraft.world.level.gameevent.GameEvent;
import net.minecraft.world.level.redstone.Orientation;
import net.minecraft.world.phys.BlockHitResult;
import org.jetbrains.annotations.Nullable;

public class TntBlock extends Block {
	public static final MapCodec<TntBlock> CODEC = simpleCodec(TntBlock::new);
	public static final BooleanProperty UNSTABLE = BlockStateProperties.UNSTABLE;

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

	public TntBlock(BlockBehaviour.Properties properties) {
		super(properties);
		this.registerDefaultState(this.defaultBlockState().setValue(UNSTABLE, false));
	}

	@Override
	protected void onPlace(BlockState state, Level level, BlockPos pos, BlockState oldState, boolean movedByPiston) {
		if (!oldState.is(state.getBlock())) {
			if (level.hasNeighborSignal(pos) && prime(level, pos)) {
				level.removeBlock(pos, false);
			}
		}
	}

	@Override
	protected void neighborChanged(BlockState state, Level level, BlockPos pos, Block neighborBlock, @Nullable Orientation orientation, boolean movedByPiston) {
		if (level.hasNeighborSignal(pos) && prime(level, pos)) {
			level.removeBlock(pos, false);
		}
	}

	@Override
	public BlockState playerWillDestroy(Level level, BlockPos pos, BlockState state, Player player) {
		if (!level.isClientSide() && !player.getAbilities().instabuild && (Boolean)state.getValue(UNSTABLE)) {
			prime(level, pos);
		}

		return super.playerWillDestroy(level, pos, state, player);
	}

	@Override
	public void wasExploded(ServerLevel level, BlockPos pos, Explosion explosion) {
		if (level.getGameRules().getBoolean(GameRules.RULE_TNT_EXPLODES)) {
			PrimedTnt primedTnt = new PrimedTnt(level, pos.getX() + 0.5, pos.getY(), pos.getZ() + 0.5, explosion.getIndirectSourceEntity());
			int i = primedTnt.getFuse();
			primedTnt.setFuse((short)(level.random.nextInt(i / 4) + i / 8));
			level.addFreshEntity(primedTnt);
		}
	}

	public static boolean prime(Level level, BlockPos pos) {
		return prime(level, pos, null);
	}

	private static boolean prime(Level level, BlockPos pos, @Nullable LivingEntity entity) {
		if (level instanceof ServerLevel serverLevel && serverLevel.getGameRules().getBoolean(GameRules.RULE_TNT_EXPLODES)) {
			PrimedTnt primedTnt = new PrimedTnt(level, pos.getX() + 0.5, pos.getY(), pos.getZ() + 0.5, entity);
			level.addFreshEntity(primedTnt);
			level.playSound(null, primedTnt.getX(), primedTnt.getY(), primedTnt.getZ(), SoundEvents.TNT_PRIMED, SoundSource.BLOCKS, 1.0F, 1.0F);
			level.gameEvent(entity, GameEvent.PRIME_FUSE, pos);
			return true;
		} else {
			return false;
		}
	}

	@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 super.useItemOn(stack, state, level, pos, player, hand, hitResult);
		} else {
			if (prime(level, pos, player)) {
				level.setBlock(pos, Blocks.AIR.defaultBlockState(), 11);
				Item item = stack.getItem();
				if (stack.is(Items.FLINT_AND_STEEL)) {
					stack.hurtAndBreak(1, player, LivingEntity.getSlotForHand(hand));
				} else {
					stack.consume(1, player);
				}

				player.awardStat(Stats.ITEM_USED.get(item));
			} else if (level instanceof ServerLevel serverLevel && !serverLevel.getGameRules().getBoolean(GameRules.RULE_TNT_EXPLODES)) {
				player.displayClientMessage(Component.translatable("block.minecraft.tnt.disabled"), true);
				return InteractionResult.PASS;
			}

			return InteractionResult.SUCCESS;
		}
	}

	@Override
	protected void onProjectileHit(Level level, BlockState state, BlockHitResult hit, Projectile projectile) {
		if (level instanceof ServerLevel serverLevel) {
			BlockPos blockPos = hit.getBlockPos();
			Entity entity = projectile.getOwner();
			if (projectile.isOnFire()
				&& projectile.mayInteract(serverLevel, blockPos)
				&& prime(level, blockPos, entity instanceof LivingEntity ? (LivingEntity)entity : null)) {
				level.removeBlock(blockPos, false);
			}
		}
	}

	@Override
	public boolean dropFromExplosion(Explosion explosion) {
		return false;
	}

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