feat: make the Corrosion effect able to convert Zombies into Skeleton

src/main/java/com/github/elenterius/biomancy/statuseffect/CorrosiveEffect.java

@@ -1,8 +1,19 @@
 package com.github.elenterius.biomancy.statuseffect;
 
 import com.github.elenterius.biomancy.init.ModDamageSources;
+import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.damagesource.DamageSource;
 import net.minecraft.world.effect.MobEffectCategory;
+import net.minecraft.world.entity.EntityType;
 import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.entity.animal.horse.SkeletonHorse;
+import net.minecraft.world.entity.animal.horse.ZombieHorse;
+import net.minecraft.world.entity.monster.Skeleton;
+import net.minecraft.world.entity.monster.Zombie;
+import net.minecraft.world.level.block.LevelEvent;
+import net.minecraftforge.event.ForgeEventFactory;
+
+import java.util.UUID;
 
 public class CorrosiveEffect extends StatusEffect {
 
@@ -12,7 +23,19 @@ public CorrosiveEffect(MobEffectCategory category, int color) {
 
 	@Override
 	public void applyEffectTick(LivingEntity livingEntity, int amplifier) {
-		int damage = 2 * (amplifier + 1);
+		int effectLevel = amplifier + 1;
+		float conversionProbability = 0.1f + 0.05f * effectLevel;
+
+		if (livingEntity.level instanceof ServerLevel serverLevel && livingEntity.level.random.nextFloat() < conversionProbability) {
+			DamageSource lastDamageSource = livingEntity.getLastDamageSource();
+			if (lastDamageSource != null && ModDamageSources.isCorrosive(lastDamageSource)) {
+				convertZombieToSkeleton(serverLevel, livingEntity);
+			}
+		}
+
+		if (!livingEntity.isAlive()) return;
+
+		int damage = 2 * effectLevel;
 		livingEntity.invulnerableTime = 0; //bypass invulnerable ticks
 		livingEntity.hurt(ModDamageSources.CORROSIVE_ACID, damage);
 	}
@@ -22,4 +45,38 @@ public boolean isDurationEffectTick(int duration, int amplifier) {
 		return duration % 7 == 0;
 	}
 
+	private boolean convertZombieToSkeleton(ServerLevel level, LivingEntity livingEntity) {
+		if (livingEntity instanceof Zombie zombie && ForgeEventFactory.canLivingConvert(zombie, EntityType.SKELETON, timer -> {})) {
+			Skeleton skeleton = zombie.convertTo(EntityType.SKELETON, true); // create new entity with same settings & equipment and remove old entity
+			if (skeleton != null) {
+				//				skeleton.finalizeSpawn(level, level.getCurrentDifficultyAt(zombie.blockPosition()), MobSpawnType.CONVERSION, null, null);
+				skeleton.invulnerableTime = 60;
+				ForgeEventFactory.onLivingConvert(zombie, skeleton);
+				if (!zombie.isSilent()) {
+					level.levelEvent(null, LevelEvent.SOUND_ZOMBIE_INFECTED, zombie.blockPosition(), 0);
+				}
+				return true;
+			}
+		}
+		else if (livingEntity instanceof ZombieHorse zombieHorse && ForgeEventFactory.canLivingConvert(zombieHorse, EntityType.SKELETON_HORSE, timer -> {})) {
+			SkeletonHorse horse = zombieHorse.convertTo(EntityType.SKELETON_HORSE, true); // create new entity with same settings & equipment and remove old entity
+			if (horse != null) {
+				//				horse.finalizeSpawn(level, level.getCurrentDifficultyAt(zombieHorse.blockPosition()), MobSpawnType.CONVERSION, null, null);
+				horse.invulnerableTime = 60;
+				UUID owner = zombieHorse.getOwnerUUID();
+				if (owner != null) {
+					horse.setOwnerUUID(owner);
+				}
+				horse.setTamed(zombieHorse.isTamed());
+				ForgeEventFactory.onLivingConvert(zombieHorse, horse);
+				if (!zombieHorse.isSilent()) {
+					level.levelEvent(null, LevelEvent.SOUND_ZOMBIE_INFECTED, zombieHorse.blockPosition(), 0);
+				}
+				return true;
+			}
+		}
+
+		return false;
+	}
+
 }