Purpur/patches/server/0003-cows-to-mooshroom-when-fed-mushrooms.patch

From 617301a9f118aaff29e08b3a0461423bafda464f 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  | 75 ++++++++++++++++++-
 2 files changed, 75 insertions(+), 1 deletion(-)

diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index d02e48a86..ab0995c2c 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -995,6 +995,7 @@ 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.getSoundCategory(), f, f1);
diff --git a/src/main/java/net/minecraft/server/EntityCow.java b/src/main/java/net/minecraft/server/EntityCow.java
index d2c2e3cc3..3cb35c422 100644
--- a/src/main/java/net/minecraft/server/EntityCow.java
+++ b/src/main/java/net/minecraft/server/EntityCow.java
@@ -4,6 +4,10 @@ package net.minecraft.server;
 import org.bukkit.craftbukkit.event.CraftEventFactory;
 import org.bukkit.craftbukkit.inventory.CraftItemStack;
 // CraftBukkit end
+// Purpur start
+import com.destroystokyo.paper.event.entity.EntityTransformedEvent;
+import org.bukkit.event.entity.EntityTransformEvent;
+// Purpur end
 
 public class EntityCow extends EntityAnimal {
 
@@ -16,7 +20,7 @@ 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(), Blocks.BROWN_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));
@@ -79,11 +83,80 @@ public class EntityCow extends EntityAnimal {
             // CraftBukkit end
 
             return true;
+            // Purpur start - feed mushroom to change to mooshroom
+        } else if (getEntityType() != EntityTypes.MOOSHROOM && isMushroom(itemstack)) {
+            return feedMushroom(entityhuman, itemstack);
+            // Purpur end
         } else {
             return super.a(entityhuman, enumhand);
         }
     }
 
+    // Purpur start - feed mushroom to change to mooshroom
+    private int redMushroomsFed = 0;
+    private int brownMushroomsFed = 0;
+
+    private boolean isMushroom(ItemStack itemstack) {
+        return itemstack.getItem() == Blocks.RED_MUSHROOM.getItem() || itemstack.getItem() == Blocks.BROWN_MUSHROOM.getItem();
+    }
+
+    private int incrementFeedCount(ItemStack itemstack) {
+        if (itemstack.getItem() == Blocks.RED_MUSHROOM.getItem()) {
+            return ++redMushroomsFed;
+        } else {
+            return ++brownMushroomsFed;
+        }
+    }
+
+    private boolean feedMushroom(EntityHuman entityhuman, ItemStack itemstack) {
+        world.broadcastEntityEffect(this, (byte) 18); // hearts
+        playSound(SoundEffects.ENTITY_COW_MILK, 1.0F, 1.0F);
+        if (incrementFeedCount(itemstack) < 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;
+        }
+        if (itemstack.getItem() == Blocks.BROWN_MUSHROOM.getItem()) {
+            mooshroom.setVariant(EntityMushroomCow.Type.BROWN);
+        } else {
+            mooshroom.setVariant(EntityMushroomCow.Type.RED);
+        }
+        mooshroom.setPositionRotation(this.locX, this.locY, this.locZ, this.yaw, this.pitch);
+        mooshroom.setHealth(this.getHealth());
+        mooshroom.setAge(getAge());
+        mooshroom.u(this);
+        mooshroom.aK = this.aK;
+        mooshroom.aM = this.aM;
+        mooshroom.lastYaw = this.lastYaw;
+        mooshroom.lastPitch = this.lastPitch;
+        if (this.hasCustomName()) {
+            mooshroom.setCustomName(this.getCustomName());
+        }
+        if (CraftEventFactory.callEntityTransformEvent(this, mooshroom, EntityTransformEvent.TransformReason.SHROOMED).isCancelled()) {
+            return false;
+        }
+        if (!new EntityTransformedEvent(this.getBukkitEntity(), mooshroom.getBukkitEntity(), EntityTransformedEvent.TransformedReason.SHROOMED).callEvent()) {
+            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(((WorldServer) world).players, null, Particles.HAPPY_VILLAGER,
+                    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
+
     @Override
     public EntityCow createChild(EntityAgeable entityageable) {
         return (EntityCow) EntityTypes.COW.a(this.world);
-- 
2.20.1