src/game/java/net/minecraft/world/item/FlintAndSteelItem.java

package net.minecraft.world.item;

import net.minecraft.advancements.CriteriaTriggers;
import net.minecraft.core.BlockPos;
import net.minecraft.server.level.ServerPlayer;
import net.minecraft.sounds.SoundEvents;
import net.minecraft.sounds.SoundSource;
import net.minecraft.world.InteractionResult;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.item.context.UseOnContext;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.block.BaseFireBlock;
import net.minecraft.world.level.block.CampfireBlock;
import net.minecraft.world.level.block.CandleBlock;
import net.minecraft.world.level.block.CandleCakeBlock;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.block.state.properties.BlockStateProperties;
import net.minecraft.world.level.gameevent.GameEvent;

public class FlintAndSteelItem extends Item {
    public FlintAndSteelItem(Item.Properties p_41295_) {
        super(p_41295_);
    }

    @Override
    public InteractionResult useOn(UseOnContext p_41297_) {
        Player player = p_41297_.getPlayer();
        Level level = p_41297_.getLevel();
        BlockPos blockpos = p_41297_.getClickedPos();
        BlockState blockstate = level.getBlockState(blockpos);
        if (!CampfireBlock.canLight(blockstate) && !CandleBlock.canLight(blockstate) && !CandleCakeBlock.canLight(blockstate)) {
            BlockPos blockpos1 = blockpos.relative(p_41297_.getClickedFace());
            if (BaseFireBlock.canBePlacedAt(level, blockpos1, p_41297_.getHorizontalDirection())) {
                level.playSound(player, blockpos1, SoundEvents.FLINTANDSTEEL_USE, SoundSource.BLOCKS, 1.0F, level.getRandom().nextFloat() * 0.4F + 0.8F);
                BlockState blockstate1 = BaseFireBlock.getState(level, blockpos1);
                level.setBlock(blockpos1, blockstate1, 11);
                level.gameEvent(player, GameEvent.BLOCK_PLACE, blockpos);
                ItemStack itemstack = p_41297_.getItemInHand();
                if (player instanceof ServerPlayer) {
                    CriteriaTriggers.PLACED_BLOCK.trigger((ServerPlayer)player, blockpos1, itemstack);
                    itemstack.hurtAndBreak(1, player, LivingEntity.getSlotForHand(p_41297_.getHand()));
                }

                return InteractionResult.SUCCESS;
            } else {
                return InteractionResult.FAIL;
            }
        } else {
            level.playSound(player, blockpos, SoundEvents.FLINTANDSTEEL_USE, SoundSource.BLOCKS, 1.0F, level.getRandom().nextFloat() * 0.4F + 0.8F);
            level.setBlock(blockpos, blockstate.setValue(BlockStateProperties.LIT, Boolean.valueOf(true)), 11);
            level.gameEvent(player, GameEvent.BLOCK_CHANGE, blockpos);
            if (player != null) {
                p_41297_.getItemInHand().hurtAndBreak(1, player, LivingEntity.getSlotForHand(p_41297_.getHand()));
            }

            return InteractionResult.SUCCESS;
        }
    }
}