Code/net/minecraft/world/entity/ai/sensing/PiglinSpecificSensor.java

package net.minecraft.world.entity.ai.sensing;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Lists;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import net.minecraft.core.BlockPos;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.tags.BlockTags;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.Mob;
import net.minecraft.world.entity.ai.Brain;
import net.minecraft.world.entity.ai.memory.MemoryModuleType;
import net.minecraft.world.entity.ai.memory.NearestVisibleLivingEntities;
import net.minecraft.world.entity.boss.wither.WitherBoss;
import net.minecraft.world.entity.monster.WitherSkeleton;
import net.minecraft.world.entity.monster.hoglin.Hoglin;
import net.minecraft.world.entity.monster.piglin.AbstractPiglin;
import net.minecraft.world.entity.monster.piglin.Piglin;
import net.minecraft.world.entity.monster.piglin.PiglinAi;
import net.minecraft.world.entity.monster.piglin.PiglinBrute;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.level.block.Blocks;
import net.minecraft.world.level.block.CampfireBlock;
import net.minecraft.world.level.block.state.BlockState;

public class PiglinSpecificSensor extends Sensor<LivingEntity> {
    @Override
    public Set<MemoryModuleType<?>> requires() {
        return ImmutableSet.of(
            MemoryModuleType.NEAREST_VISIBLE_LIVING_ENTITIES,
            MemoryModuleType.NEAREST_LIVING_ENTITIES,
            MemoryModuleType.NEAREST_VISIBLE_NEMESIS,
            MemoryModuleType.NEAREST_TARGETABLE_PLAYER_NOT_WEARING_GOLD,
            MemoryModuleType.NEAREST_PLAYER_HOLDING_WANTED_ITEM,
            MemoryModuleType.NEAREST_VISIBLE_HUNTABLE_HOGLIN,
            MemoryModuleType.NEAREST_VISIBLE_BABY_HOGLIN,
            MemoryModuleType.NEAREST_VISIBLE_ADULT_PIGLINS,
            MemoryModuleType.NEARBY_ADULT_PIGLINS,
            MemoryModuleType.VISIBLE_ADULT_PIGLIN_COUNT,
            MemoryModuleType.VISIBLE_ADULT_HOGLIN_COUNT,
            MemoryModuleType.NEAREST_REPELLENT
        );
    }

    @Override
    protected void doTick(ServerLevel p_26726_, LivingEntity p_26727_) {
        Brain<?> brain = p_26727_.getBrain();
        brain.setMemory(MemoryModuleType.NEAREST_REPELLENT, findNearestRepellent(p_26726_, p_26727_));
        Optional<Mob> optional = Optional.empty();
        Optional<Hoglin> optional1 = Optional.empty();
        Optional<Hoglin> optional2 = Optional.empty();
        Optional<Piglin> optional3 = Optional.empty();
        Optional<LivingEntity> optional4 = Optional.empty();
        Optional<Player> optional5 = Optional.empty();
        Optional<Player> optional6 = Optional.empty();
        int i = 0;
        List<AbstractPiglin> list = Lists.newArrayList();
        List<AbstractPiglin> list1 = Lists.newArrayList();
        NearestVisibleLivingEntities nearestvisiblelivingentities = brain.getMemory(MemoryModuleType.NEAREST_VISIBLE_LIVING_ENTITIES).orElse(NearestVisibleLivingEntities.empty());

        for (LivingEntity livingentity : nearestvisiblelivingentities.findAll(p_186157_ -> true)) {
            if (livingentity instanceof Hoglin hoglin) {
                if (hoglin.isBaby() && optional2.isEmpty()) {
                    optional2 = Optional.of(hoglin);
                } else if (hoglin.isAdult()) {
                    i++;
                    if (optional1.isEmpty() && hoglin.canBeHunted()) {
                        optional1 = Optional.of(hoglin);
                    }
                }
            } else if (livingentity instanceof PiglinBrute piglinbrute) {
                list.add(piglinbrute);
            } else if (livingentity instanceof Piglin piglin) {
                if (piglin.isBaby() && optional3.isEmpty()) {
                    optional3 = Optional.of(piglin);
                } else if (piglin.isAdult()) {
                    list.add(piglin);
                }
            } else if (livingentity instanceof Player player) {
                if (optional5.isEmpty() && !PiglinAi.isWearingSafeArmor(player) && p_26727_.canAttack(livingentity)) {
                    optional5 = Optional.of(player);
                }

                if (optional6.isEmpty() && !player.isSpectator() && PiglinAi.isPlayerHoldingLovedItem(player)) {
                    optional6 = Optional.of(player);
                }
            } else if (!optional.isEmpty() || !(livingentity instanceof WitherSkeleton) && !(livingentity instanceof WitherBoss)) {
                if (optional4.isEmpty() && PiglinAi.isZombified(livingentity.getType())) {
                    optional4 = Optional.of(livingentity);
                }
            } else {
                optional = Optional.of((Mob)livingentity);
            }
        }

        for (LivingEntity livingentity1 : brain.getMemory(MemoryModuleType.NEAREST_LIVING_ENTITIES).orElse(ImmutableList.of())) {
            if (livingentity1 instanceof AbstractPiglin abstractpiglin && abstractpiglin.isAdult()) {
                list1.add(abstractpiglin);
            }
        }

        brain.setMemory(MemoryModuleType.NEAREST_VISIBLE_NEMESIS, optional);
        brain.setMemory(MemoryModuleType.NEAREST_VISIBLE_HUNTABLE_HOGLIN, optional1);
        brain.setMemory(MemoryModuleType.NEAREST_VISIBLE_BABY_HOGLIN, optional2);
        brain.setMemory(MemoryModuleType.NEAREST_VISIBLE_ZOMBIFIED, optional4);
        brain.setMemory(MemoryModuleType.NEAREST_TARGETABLE_PLAYER_NOT_WEARING_GOLD, optional5);
        brain.setMemory(MemoryModuleType.NEAREST_PLAYER_HOLDING_WANTED_ITEM, optional6);
        brain.setMemory(MemoryModuleType.NEARBY_ADULT_PIGLINS, list1);
        brain.setMemory(MemoryModuleType.NEAREST_VISIBLE_ADULT_PIGLINS, list);
        brain.setMemory(MemoryModuleType.VISIBLE_ADULT_PIGLIN_COUNT, list.size());
        brain.setMemory(MemoryModuleType.VISIBLE_ADULT_HOGLIN_COUNT, i);
    }

    private static Optional<BlockPos> findNearestRepellent(ServerLevel p_26735_, LivingEntity p_26736_) {
        return BlockPos.findClosestMatch(p_26736_.blockPosition(), 8, 4, p_186160_ -> isValidRepellent(p_26735_, p_186160_));
    }

    private static boolean isValidRepellent(ServerLevel p_26729_, BlockPos p_26730_) {
        BlockState blockstate = p_26729_.getBlockState(p_26730_);
        boolean flag = blockstate.is(BlockTags.PIGLIN_REPELLENTS);
        return flag && blockstate.is(Blocks.SOUL_CAMPFIRE) ? CampfireBlock.isLitCampfire(blockstate) : flag;
    }
}