Configurable player knockback zombie

patches/server/0092-Configurable-player-knockback-zombie.patch

@@ -0,0 +1,60 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Dreeam <[email protected]>
+Date: Sun, 4 Aug 2024 19:34:29 +0800
+Subject: [PATCH] Configurable player knockback zombie
+
+
+diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
+index 7c75298c8ea7a828c2d9cd4e7ffd4d09a0113aed..8b0cd878d8bf633283b645dc06dfbb98c06e269f 100644
+--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
++++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
+@@ -2028,6 +2028,8 @@ public abstract class LivingEntity extends Entity implements Attackable {
+     }
+
+     public void knockback(double d0, double d1, double d2, @Nullable Entity attacker, io.papermc.paper.event.entity.EntityKnockbackEvent.Cause cause) { // Paper - knockback events
++        if (!canKnockback(attacker, this)) return; // Leaf - Configurable player knockback zombie
++
+         d0 *= 1.0D - this.getAttributeValue(Attributes.KNOCKBACK_RESISTANCE);
+         if (true || d0 > 0.0D) { // CraftBukkit - Call event even when force is 0
+             //this.hasImpulse = true; // CraftBukkit - Move down
+@@ -2055,6 +2057,20 @@ public abstract class LivingEntity extends Entity implements Attackable {
+         }
+     }
+
++    // Leaf start - Configurable player knockback zombie
++    private boolean canKnockback(@Nullable Entity attacker, LivingEntity target) {
++        if (!org.dreeam.leaf.config.modules.gameplay.Knockback.canPlayerKnockbackZombie) {
++            if (attacker instanceof ServerPlayer && target.getType() == EntityType.ZOMBIE) { // Player -> Zombie
++                return false;
++            } else if (attacker instanceof Projectile projectile && projectile.getOwner() instanceof ServerPlayer && target.getType() == EntityType.ZOMBIE) { // Player -> projectile -> Zombie
++                return false;
++            }
++        }
++
++        return true;
++    }
++    // Leaf end - Configurable player knockback zombie
++
+     public void indicateDamage(double deltaX, double deltaZ) {}
+
+     @Nullable
+diff --git a/src/main/java/org/dreeam/leaf/config/modules/gameplay/Knockback.java b/src/main/java/org/dreeam/leaf/config/modules/gameplay/Knockback.java
+index 35e8a9568cd37f4ed75d10a38beea996c8729388..df26a6e47fba5781000bafbda735629f9057971f 100644
+--- a/src/main/java/org/dreeam/leaf/config/modules/gameplay/Knockback.java
++++ b/src/main/java/org/dreeam/leaf/config/modules/gameplay/Knockback.java
+@@ -11,6 +11,7 @@ public class Knockback extends ConfigModules {
+
+     public static boolean snowballCanKnockback = false;
+     public static boolean eggCanKnockback = false;
++    public static boolean canPlayerKnockbackZombie = true;
+
+     @Override
+     public void onLoaded() {
+@@ -18,5 +19,7 @@ public class Knockback extends ConfigModules {
+                 "Make snowball can knockback players");
+         eggCanKnockback = config.getBoolean(getBasePath() + ".egg-knockback-players", eggCanKnockback,
+                 "Make egg can knockback players");
++        canPlayerKnockbackZombie = config.getBoolean(getBasePath() + ".can-player-knockback-zombie", canPlayerKnockbackZombie,
++                "Make players can knockback zombie");
+     }
+ }