Purpur/patches/server/0132-Customizable-WitherBoss-Health-and-Healing.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: jmp <jasonpenilla2@me.com>
Date: Thu, 20 Aug 2020 17:38:12 -0700
Subject: [PATCH] Customizable WitherBoss Health and Healing

Adds the ability to customize the health of the Wither Boss, as well as the amount that it heals, and how often in the PurpurWorldConfig.

diff --git a/src/main/java/net/minecraft/server/EntityWither.java b/src/main/java/net/minecraft/server/EntityWither.java
index 1054b492c..2a288d372 100644
--- a/src/main/java/net/minecraft/server/EntityWither.java
+++ b/src/main/java/net/minecraft/server/EntityWither.java
@@ -145,6 +145,12 @@ public class EntityWither extends EntityMonster implements IRangedEntity {
         skull.setPositionRaw(headX, headY, headZ);
         world.addEntity(skull);
     }
+
+    public void initAttributes(World world) {
+        if (world != null) {
+            this.getAttributeInstance(GenericAttributes.MAX_HEALTH).setValue(world.purpurConfig.witherMaxHealth);
+        }
+    }
     // Purpur end
 
     @Override
@@ -348,7 +354,7 @@ public class EntityWither extends EntityMonster implements IRangedEntity {
 
             this.setInvul(i);
             if (this.ticksLived % 10 == 0) {
-                this.heal(10.0F, EntityRegainHealthEvent.RegainReason.WITHER_SPAWN); // CraftBukkit
+                this.heal(this.getMaxHealth() / 33, EntityRegainHealthEvent.RegainReason.WITHER_SPAWN); // CraftBukkit // Purpur - use max health for healing instead of a constant
             }
 
         } else {
@@ -457,8 +463,10 @@ public class EntityWither extends EntityMonster implements IRangedEntity {
                 }
             }
 
-            if (this.ticksLived % 20 == 0) {
-                this.heal(1.0F, EntityRegainHealthEvent.RegainReason.REGEN); // CraftBukkit
+            // Purpur start - customizable heal rate and amount
+            if (this.ticksLived % world.purpurConfig.witherHealthRegenDelay == 0) {
+                this.heal(world.purpurConfig.witherHealthRegenAmount, EntityRegainHealthEvent.RegainReason.REGEN); // CraftBukkit
+                // Purpur end
             }
 
             //this.bossBattle.setProgress(this.getHealth() / this.getMaxHealth()); // Paper - Moved down
@@ -473,6 +481,7 @@ public class EntityWither extends EntityMonster implements IRangedEntity {
     public void beginSpawnSequence() {
         this.setInvul(220);
         this.setHealth(this.getMaxHealth() / 3.0F);
+        initAttributes(this.world); // Purpur - building the wither with soul_sand + wither_skeleton_skulls does not call prepare, so we need to call this manually
     }
 
     @Override
diff --git a/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java b/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
index 66ac267f0..c7ccc896a 100644
--- a/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
+++ b/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
@@ -887,10 +887,16 @@ public class PurpurWorldConfig {
     public boolean witherRidable = false;
     public boolean witherRidableInWater = false;
     public double witherMaxY = 256D;
+    public double witherMaxHealth = 300.0D;
+    public float witherHealthRegenAmount = 1.0f;
+    public int witherHealthRegenDelay = 20;
     private void witherSettings() {
         witherRidable = getBoolean("mobs.wither.ridable", witherRidable);
         witherRidableInWater = getBoolean("mobs.wither.ridable-in-water", witherRidableInWater);
         witherMaxY = getDouble("mobs.wither.ridable-max-y", witherMaxY);
+        witherMaxHealth = getDouble("mobs.wither.max-health", witherMaxHealth);
+        witherHealthRegenAmount = (float) getDouble("mobs.wither.health-regen-amount", witherHealthRegenAmount);
+        witherHealthRegenDelay = getInt("mobs.wither.health-regen-delay", witherHealthRegenDelay);
     }
 
     public boolean witherSkeletonRidable = false;