From 406e7fabf130b3e736f3eb27569874723f4e44d8 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Sat, 4 May 2019 01:10:30 -0500
Subject: [PATCH] cows to mooshroom when fed mushrooms

---
 .../java/net/minecraft/server/Entity.java     |  1 +
 .../java/net/minecraft/server/EntityCow.java  | 45 ++++++++++++++++++-
 2 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index 581c78e00..89a8bbe33 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -1082,6 +1082,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
         return false;
     }
 
+    public void playSound(SoundEffect soundeffect, float volume, float pitch) { a(soundeffect, volume, pitch); } // Paper - OBFHELPER
     public void a(SoundEffect soundeffect, float f, float f1) {
         if (!this.isSilent()) {
             this.world.a((EntityHuman) null, this.locX, this.locY, this.locZ, soundeffect, this.bV(), f, f1);
diff --git a/src/main/java/net/minecraft/server/EntityCow.java b/src/main/java/net/minecraft/server/EntityCow.java
index cc53e915d..efd2a0ee7 100644
--- a/src/main/java/net/minecraft/server/EntityCow.java
+++ b/src/main/java/net/minecraft/server/EntityCow.java
@@ -21,7 +21,7 @@ public class EntityCow extends EntityAnimal {
         this.goalSelector.a(0, new PathfinderGoalFloat(this));
         this.goalSelector.a(1, new PathfinderGoalPanic(this, 2.0D));
         this.goalSelector.a(2, new PathfinderGoalBreed(this, 1.0D));
-        this.goalSelector.a(3, new PathfinderGoalTempt(this, 1.25D, RecipeItemStack.a(Items.WHEAT), false));
+        this.goalSelector.a(3, new PathfinderGoalTempt(this, 1.25D, RecipeItemStack.a(Items.WHEAT, Blocks.RED_MUSHROOM.getItem()), false));
         this.goalSelector.a(4, new PathfinderGoalFollowParent(this, 1.25D));
         this.goalSelector.a(5, new PathfinderGoalRandomStrollLand(this, 1.0D));
         this.goalSelector.a(6, new PathfinderGoalLookAtPlayer(this, EntityHuman.class, 6.0F));
@@ -59,6 +59,8 @@ public class EntityCow extends EntityAnimal {
         return LootTables.S;
     }
 
+    private int mushroomsFed = 0; // Purpur
+
     public boolean a(EntityHuman entityhuman, EnumHand enumhand) {
         ItemStack itemstack = entityhuman.b(enumhand);
 
@@ -82,6 +84,47 @@ public class EntityCow extends EntityAnimal {
             // CraftBukkit end
 
             return true;
+            // Purpur start - feed mushroom to change to mooshroom
+        } else if (getEntityType() != EntityTypes.MOOSHROOM && itemstack.getItem() == Blocks.RED_MUSHROOM.getItem()) {
+            world.broadcastEntityEffect(this, (byte) 18); // hearts
+            playSound(SoundEffects.ENTITY_COW_MILK, 1.0F, 1.0F);
+            if (++mushroomsFed < 5) {
+                if (!entityhuman.abilities.canInstantlyBuild) {
+                    itemstack.subtract(1);
+                }
+                return true; // require 5 mushrooms to transform (prevents mushroom duping)
+            }
+            EntityMushroomCow mooshroom = EntityTypes.MOOSHROOM.create(world);
+            if (mooshroom == null) {
+                return false;
+            }
+            mooshroom.setPositionRotation(this.locX, this.locY, this.locZ, this.yaw, this.pitch);
+            mooshroom.setHealth(this.getHealth());
+            mooshroom.setAge(getAge());
+            mooshroom.u(this);
+            mooshroom.aQ = this.aQ;
+            mooshroom.aS = this.aS;
+            mooshroom.lastYaw = this.lastYaw;
+            mooshroom.lastPitch = this.lastPitch;
+            if (this.hasCustomName()) {
+                mooshroom.setCustomName(this.getCustomName());
+            }
+            if (!new com.destroystokyo.paper.event.entity.EntityTransformedEvent(this.getBukkitEntity(), mooshroom.getBukkitEntity(), com.destroystokyo.paper.event.entity.EntityTransformedEvent.TransformedReason.SHROOMED).callEvent()) {
+                mooshroom.die();
+                return false;
+            }
+            this.world.addEntity(mooshroom);
+            this.die();
+            if (!entityhuman.abilities.canInstantlyBuild) {
+                itemstack.subtract(1);
+            }
+            for (int i = 0; i < 15; ++i) {
+                ((WorldServer) world).sendParticles(world.players, null, Particles.z,
+                        locX + random.nextFloat(), locY + (random.nextFloat() * 2), locZ + random.nextFloat(), 1,
+                        random.nextGaussian() * 0.05D, random.nextGaussian() * 0.05D, random.nextGaussian() * 0.05D, 0, true);
+            }
+            return true;
+            // Purpur end
         } else {
             return super.a(entityhuman, enumhand);
         }
-- 
2.20.1