Paper/patches/api/0398-Add-Shearable-API.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
Date: Sun, 17 Oct 2021 15:39:41 -0400
Subject: [PATCH] Add Shearable API


diff --git a/src/main/java/io/papermc/paper/entity/Shearable.java b/src/main/java/io/papermc/paper/entity/Shearable.java
new file mode 100644
index 0000000000000000000000000000000000000000..0d5793790ab6a47525ad33033517361205756338
--- /dev/null
+++ b/src/main/java/io/papermc/paper/entity/Shearable.java
@@ -0,0 +1,43 @@
+package io.papermc.paper.entity;
+
+import net.kyori.adventure.sound.Sound;
+import org.bukkit.entity.Entity;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Represents an entity that can be sheared.
+ */
+public interface Shearable extends Entity {
+
+    /**
+     * Forces the entity to be sheared and then play the effect as if it were sheared by a player.
+     * This will cause the entity to be sheared, even if {@link Shearable#readyToBeSheared()} is false.
+     * <p>
+     * Some shearing behavior may cause the entity to no longer be valid
+     * due to it being replaced by a different entity.
+     */
+    default void shear() {
+        this.shear(Sound.Source.PLAYER);
+    }
+
+    /**
+     * Forces the entity to be sheared and then play the effect as if it were sheared by the provided source.
+     * This will cause the entity to be sheared, even if {@link Shearable#readyToBeSheared()} is false.
+     * <p>
+     * Some shearing behavior may cause the entity to no longer be valid
+     * due to it being replaced by a different entity.
+     * <p>
+     * This simulates the behavior of an actual shearing, which may cause events like EntityTransformEvent to be called
+     * for mooshrooms, and EntityDropItemEvent to be called for sheep.
+     *
+     * @param source Sound source to play any sound effects on
+     */
+    void shear(@NotNull Sound.Source source);
+
+    /**
+     * Gets if the entity would be able to be sheared or not naturally using shears.
+     *
+     * @return if the entity can be sheared
+     */
+    boolean readyToBeSheared();
+}
diff --git a/src/main/java/org/bukkit/entity/MushroomCow.java b/src/main/java/org/bukkit/entity/MushroomCow.java
index cef1700834643fe28ed5737578d91ecefbe99e2f..86c0043ef4e1288b6fe2f68a9b6d01c3de2c3454 100644
--- a/src/main/java/org/bukkit/entity/MushroomCow.java
+++ b/src/main/java/org/bukkit/entity/MushroomCow.java
@@ -8,7 +8,7 @@ import org.jetbrains.annotations.NotNull;
 /**
  * Represents a mushroom {@link Cow}
  */
-public interface MushroomCow extends Cow {
+public interface MushroomCow extends Cow, io.papermc.paper.entity.Shearable { // Paper
 
     /**
      * Checks for the presence of custom potion effects to be applied to the
diff --git a/src/main/java/org/bukkit/entity/Sheep.java b/src/main/java/org/bukkit/entity/Sheep.java
index f4ce312ccd927a8b64f4266b35a0a53b85e591f3..97388d46cee225dedc0b61a12e7b60b3424732c8 100644
--- a/src/main/java/org/bukkit/entity/Sheep.java
+++ b/src/main/java/org/bukkit/entity/Sheep.java
@@ -5,7 +5,7 @@ import org.bukkit.material.Colorable;
 /**
  * Represents a Sheep.
  */
-public interface Sheep extends Animals, Colorable {
+public interface Sheep extends Animals, Colorable, io.papermc.paper.entity.Shearable { // Paper - Shear API
 
     /**
      * @return Whether the sheep is sheared.
diff --git a/src/main/java/org/bukkit/entity/Snowman.java b/src/main/java/org/bukkit/entity/Snowman.java
index 10f8f6d45ae9280651c3ebddd1f90acbd7d6ff29..7fbfdb07585c7b28acea1f0c1f58ada0cc744441 100644
--- a/src/main/java/org/bukkit/entity/Snowman.java
+++ b/src/main/java/org/bukkit/entity/Snowman.java
@@ -5,7 +5,7 @@ import com.destroystokyo.paper.entity.RangedEntity;
 /**
  * Represents a snowman entity
  */
-public interface Snowman extends Golem, RangedEntity { // Paper
+public interface Snowman extends Golem, RangedEntity, io.papermc.paper.entity.Shearable { // Paper
 
     /**
      * Gets whether this snowman is in "derp mode", meaning it is not wearing a