minecraft-src/net/minecraft/world/entity/projectile/EvokerFangs.java

package net.minecraft.world.entity.projectile;

import java.util.UUID;
import net.minecraft.core.UUIDUtil;
import net.minecraft.core.particles.ParticleTypes;
import net.minecraft.nbt.CompoundTag;
import net.minecraft.network.syncher.SynchedEntityData.Builder;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.sounds.SoundEvents;
import net.minecraft.world.damagesource.DamageSource;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.EntityType;
import net.minecraft.world.entity.LivingEntity;
import net.minecraft.world.entity.TraceableEntity;
import net.minecraft.world.item.enchantment.EnchantmentHelper;
import net.minecraft.world.level.Level;
import org.jetbrains.annotations.Nullable;

public class EvokerFangs extends Entity implements TraceableEntity {
	public static final int ATTACK_DURATION = 20;
	public static final int LIFE_OFFSET = 2;
	public static final int ATTACK_TRIGGER_TICKS = 14;
	private static final int DEFAULT_WARMUP_DELAY = 0;
	private int warmupDelayTicks = 0;
	private boolean sentSpikeEvent;
	private int lifeTicks = 22;
	private boolean clientSideAttackStarted;
	@Nullable
	private LivingEntity owner;
	@Nullable
	private UUID ownerUUID;

	public EvokerFangs(EntityType<? extends EvokerFangs> entityType, Level level) {
		super(entityType, level);
	}

	public EvokerFangs(Level level, double x, double y, double z, float yRot, int warmupDelay, LivingEntity owner) {
		this(EntityType.EVOKER_FANGS, level);
		this.warmupDelayTicks = warmupDelay;
		this.setOwner(owner);
		this.setYRot(yRot * (180.0F / (float)Math.PI));
		this.setPos(x, y, z);
	}

	@Override
	protected void defineSynchedData(Builder builder) {
	}

	public void setOwner(@Nullable LivingEntity owner) {
		this.owner = owner;
		this.ownerUUID = owner == null ? null : owner.getUUID();
	}

	@Nullable
	public LivingEntity getOwner() {
		if (this.owner == null && this.ownerUUID != null && this.level() instanceof ServerLevel) {
			Entity entity = ((ServerLevel)this.level()).getEntity(this.ownerUUID);
			if (entity instanceof LivingEntity) {
				this.owner = (LivingEntity)entity;
			}
		}

		return this.owner;
	}

	@Override
	protected void readAdditionalSaveData(CompoundTag tag) {
		this.warmupDelayTicks = tag.getIntOr("Warmup", 0);
		this.ownerUUID = (UUID)tag.read("Owner", UUIDUtil.CODEC).orElse(null);
	}

	@Override
	protected void addAdditionalSaveData(CompoundTag tag) {
		tag.putInt("Warmup", this.warmupDelayTicks);
		tag.storeNullable("Owner", UUIDUtil.CODEC, this.ownerUUID);
	}

	@Override
	public void tick() {
		super.tick();
		if (this.level().isClientSide) {
			if (this.clientSideAttackStarted) {
				this.lifeTicks--;
				if (this.lifeTicks == 14) {
					for (int i = 0; i < 12; i++) {
						double d = this.getX() + (this.random.nextDouble() * 2.0 - 1.0) * this.getBbWidth() * 0.5;
						double e = this.getY() + 0.05 + this.random.nextDouble();
						double f = this.getZ() + (this.random.nextDouble() * 2.0 - 1.0) * this.getBbWidth() * 0.5;
						double g = (this.random.nextDouble() * 2.0 - 1.0) * 0.3;
						double h = 0.3 + this.random.nextDouble() * 0.3;
						double j = (this.random.nextDouble() * 2.0 - 1.0) * 0.3;
						this.level().addParticle(ParticleTypes.CRIT, d, e + 1.0, f, g, h, j);
					}
				}
			}
		} else if (--this.warmupDelayTicks < 0) {
			if (this.warmupDelayTicks == -8) {
				for (LivingEntity livingEntity : this.level().getEntitiesOfClass(LivingEntity.class, this.getBoundingBox().inflate(0.2, 0.0, 0.2))) {
					this.dealDamageTo(livingEntity);
				}
			}

			if (!this.sentSpikeEvent) {
				this.level().broadcastEntityEvent(this, (byte)4);
				this.sentSpikeEvent = true;
			}

			if (--this.lifeTicks < 0) {
				this.discard();
			}
		}
	}

	private void dealDamageTo(LivingEntity target) {
		LivingEntity livingEntity = this.getOwner();
		if (target.isAlive() && !target.isInvulnerable() && target != livingEntity) {
			if (livingEntity == null) {
				target.hurt(this.damageSources().magic(), 6.0F);
			} else {
				if (livingEntity.isAlliedTo(target)) {
					return;
				}

				DamageSource damageSource = this.damageSources().indirectMagic(this, livingEntity);
				if (this.level() instanceof ServerLevel serverLevel && target.hurtServer(serverLevel, damageSource, 6.0F)) {
					EnchantmentHelper.doPostAttackEffects(serverLevel, target, damageSource);
				}
			}
		}
	}

	@Override
	public void handleEntityEvent(byte id) {
		super.handleEntityEvent(id);
		if (id == 4) {
			this.clientSideAttackStarted = true;
			if (!this.isSilent()) {
				this.level()
					.playLocalSound(
						this.getX(), this.getY(), this.getZ(), SoundEvents.EVOKER_FANGS_ATTACK, this.getSoundSource(), 1.0F, this.random.nextFloat() * 0.2F + 0.85F, false
					);
			}
		}
	}

	public float getAnimationProgress(float partialTicks) {
		if (!this.clientSideAttackStarted) {
			return 0.0F;
		} else {
			int i = this.lifeTicks - 2;
			return i <= 0 ? 1.0F : 1.0F - (i - partialTicks) / 20.0F;
		}
	}

	@Override
	public boolean hurtServer(ServerLevel level, DamageSource damageSource, float amount) {
		return false;
	}
}