From 0000000000000000000000000000000000000000 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 eat mushrooms


diff --git a/src/main/java/net/minecraft/world/entity/animal/Cow.java b/src/main/java/net/minecraft/world/entity/animal/Cow.java
index 8229a99d4454df64def52bbf686183284d62c900..e6fa66a8c88d4f20a7383e8fd5b3df44718478fa 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Cow.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Cow.java
@@ -74,7 +74,7 @@ public class Cow extends Animal {
         this.goalSelector.addGoal(1, new PanicGoal(this, 2.0D));
         this.goalSelector.addGoal(2, new BreedGoal(this, 1.0D));
         this.goalSelector.addGoal(3, new TemptGoal(this, 1.25D, (itemstack) -> {
-            return itemstack.is(ItemTags.COW_FOOD);
+            return level().purpurConfig.cowFeedMushrooms > 0 && (itemstack.is(net.minecraft.world.level.block.Blocks.RED_MUSHROOM.asItem()) || itemstack.is(net.minecraft.world.level.block.Blocks.BROWN_MUSHROOM.asItem())) || itemstack.is(ItemTags.COW_FOOD); // Purpur
         }, false));
         this.goalSelector.addGoal(4, new FollowParentGoal(this, 1.25D));
         this.goalSelector.addGoal(5, new WaterAvoidingRandomStrollGoal(this, 1.0D));
@@ -136,6 +136,10 @@ public class Cow extends Animal {
 
             player.setItemInHand(hand, itemstack1);
             return InteractionResult.SUCCESS;
+        // Purpur start - feed mushroom to change to mooshroom
+        } else if (level().purpurConfig.cowFeedMushrooms > 0 && this.getType() != EntityType.MOOSHROOM && isMushroom(itemstack)) {
+            return this.feedMushroom(player, itemstack);
+        // Purpur end
         } else {
             return super.mobInteract(player, hand);
         }
@@ -151,4 +155,66 @@ public class Cow extends Animal {
     public EntityDimensions getDefaultDimensions(Pose pose) {
         return this.isBaby() ? Cow.BABY_DIMENSIONS : super.getDefaultDimensions(pose);
     }
+
+    // Purpur start - feed mushroom to change to mooshroom
+    private int redMushroomsFed = 0;
+    private int brownMushroomsFed = 0;
+
+    private boolean isMushroom(ItemStack stack) {
+        return stack.getItem() == net.minecraft.world.level.block.Blocks.RED_MUSHROOM.asItem() || stack.getItem() == net.minecraft.world.level.block.Blocks.BROWN_MUSHROOM.asItem();
+    }
+
+    private int incrementFeedCount(ItemStack stack) {
+        if (stack.getItem() == net.minecraft.world.level.block.Blocks.RED_MUSHROOM.asItem()) {
+            return ++redMushroomsFed;
+        } else {
+            return ++brownMushroomsFed;
+        }
+    }
+
+    private InteractionResult feedMushroom(Player player, ItemStack stack) {
+        level().broadcastEntityEvent(this, (byte) 18); // hearts
+        playSound(SoundEvents.COW_MILK, 1.0F, 1.0F);
+        if (incrementFeedCount(stack) < level().purpurConfig.cowFeedMushrooms) {
+            if (!player.getAbilities().instabuild) {
+                stack.shrink(1);
+            }
+            return InteractionResult.CONSUME; // require 5 mushrooms to transform (prevents mushroom duping)
+        }
+        MushroomCow mooshroom = EntityType.MOOSHROOM.create(level(), EntitySpawnReason.CONVERSION);
+        if (mooshroom == null) {
+            return InteractionResult.PASS;
+        }
+        if (stack.getItem() == net.minecraft.world.level.block.Blocks.BROWN_MUSHROOM.asItem()) {
+            mooshroom.setVariant(MushroomCow.Variant.BROWN);
+        } else {
+            mooshroom.setVariant(MushroomCow.Variant.RED);
+        }
+        mooshroom.moveTo(this.getX(), this.getY(), this.getZ(), this.getYRot(), this.getXRot());
+        mooshroom.setHealth(this.getHealth());
+        mooshroom.setAge(getAge());
+        mooshroom.copyPosition(this);
+        mooshroom.setYBodyRot(this.yBodyRot);
+        mooshroom.setYHeadRot(this.getYHeadRot());
+        mooshroom.yRotO = this.yRotO;
+        mooshroom.xRotO = this.xRotO;
+        if (this.hasCustomName()) {
+            mooshroom.setCustomName(this.getCustomName());
+        }
+        if (CraftEventFactory.callEntityTransformEvent(this, mooshroom, org.bukkit.event.entity.EntityTransformEvent.TransformReason.INFECTION).isCancelled()) {
+            return InteractionResult.PASS;
+        }
+        this.level().addFreshEntity(mooshroom);
+        this.remove(RemovalReason.DISCARDED, org.bukkit.event.entity.EntityRemoveEvent.Cause.DISCARD);
+        if (!player.getAbilities().instabuild) {
+            stack.shrink(1);
+        }
+        for (int i = 0; i < 15; ++i) {
+            ((ServerLevel) level()).sendParticles(((ServerLevel) level()).players(), null, net.minecraft.core.particles.ParticleTypes.HAPPY_VILLAGER,
+                    getX() + random.nextFloat(), getY() + (random.nextFloat() * 2), getZ() + random.nextFloat(), 1,
+                    random.nextGaussian() * 0.05D, random.nextGaussian() * 0.05D, random.nextGaussian() * 0.05D, 0, true);
+        }
+        return InteractionResult.SUCCESS;
+    }
+    // Purpur end
 }
diff --git a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
index b3284dfbcdc240919776f47a780a824c406c2781..6eb25a9b4bb634e57f6de015c9a9f2fc78d0b86f 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurWorldConfig.java
@@ -390,6 +390,7 @@ public class PurpurWorldConfig {
     public boolean cowControllable = true;
     public double cowMaxHealth = 10.0D;
     public double cowScale = 1.0D;
+    public int cowFeedMushrooms = 0;
     private void cowSettings() {
         cowRidable = getBoolean("mobs.cow.ridable", cowRidable);
         cowRidableInWater = getBoolean("mobs.cow.ridable-in-water", cowRidableInWater);
@@ -401,6 +402,7 @@ public class PurpurWorldConfig {
         }
         cowMaxHealth = getDouble("mobs.cow.attributes.max_health", cowMaxHealth);
         cowScale = Mth.clamp(getDouble("mobs.cow.attributes.scale", cowScale), 0.0625D, 16.0D);
+        cowFeedMushrooms = getInt("mobs.cow.feed-mushrooms-for-mooshroom", cowFeedMushrooms);
     }
 
     public boolean creakingRidable = false;