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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Zero <zero@cock.li>
Date: Sat, 22 Feb 2020 16:10:31 -0500
Subject: [PATCH] Configurable chance of villager zombie infection

This allows you to solve an issue in vanilla behavior where:
* On easy difficulty your villagers will NEVER get infected, meaning they will always die.
* On normal difficulty they will have a 50% of getting infected or dying.

diff --git a/src/main/java/net/minecraft/world/entity/monster/Zombie.java b/src/main/java/net/minecraft/world/entity/monster/Zombie.java
index 2d6cf6ea1717b28871c40de69120336c59a4d347..66fa70762ba3387aa200caa4d8a4e557498cfff1 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Zombie.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Zombie.java
@@ -443,10 +443,8 @@ public class Zombie extends Monster {
     public boolean killedEntity(ServerLevel world, LivingEntity other) {
         boolean flag = super.killedEntity(world, other);
 
-        if ((world.getDifficulty() == Difficulty.NORMAL || world.getDifficulty() == Difficulty.HARD) && other instanceof Villager entityvillager) {
-            if (world.getDifficulty() != Difficulty.HARD && this.random.nextBoolean()) {
-                return flag;
-            }
+        final double fallbackChance = world.getDifficulty() == Difficulty.HARD ? 100d : world.getDifficulty() == Difficulty.NORMAL ? 50d : 0d; // Paper - Configurable chance of villager zombie infection
+        if (this.random.nextDouble() * 100 < world.paperConfig().entities.behavior.zombieVillagerInfectionChance.or(fallbackChance) && other instanceof Villager entityvillager) { // Paper - Configurable chance of villager zombie infection
             // CraftBukkit start
             flag = Zombie.zombifyVillager(world, entityvillager, this.blockPosition(), this.isSilent(), CreatureSpawnEvent.SpawnReason.INFECTION) == null;
         }