From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Mariell Hoversholm <proximyst@proximyst.com>
Date: Thu, 30 Apr 2020 16:56:31 +0200
Subject: [PATCH] Add Raw Byte ItemStack Serialization

Serializes using NBT which is safer for server data migrations than bukkits format.

diff --git a/src/main/java/org/bukkit/UnsafeValues.java b/src/main/java/org/bukkit/UnsafeValues.java
index 24fad8e59a3a5a174d24505cedda2a3fd52115b1..ee9ed5f0e2936c740903784b01b9e2fff75b92f8 100644
--- a/src/main/java/org/bukkit/UnsafeValues.java
+++ b/src/main/java/org/bukkit/UnsafeValues.java
@@ -121,5 +121,9 @@ public interface UnsafeValues {
     default com.destroystokyo.paper.util.VersionFetcher getVersionFetcher() {
         return new com.destroystokyo.paper.util.VersionFetcher.DummyVersionFetcher();
     }
+
+    byte[] serializeItem(ItemStack item);
+
+    ItemStack deserializeItem(byte[] data);
     // Paper end
 }
diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
index b15645cd56c245214bb5b87b36395fbc8e86e3d3..7c280d7beeb42dca52e36e77bbd41742b2572710 100644
--- a/src/main/java/org/bukkit/inventory/ItemStack.java
+++ b/src/main/java/org/bukkit/inventory/ItemStack.java
@@ -639,6 +639,30 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
         return Bukkit.getServer().getItemFactory().ensureServerConversions(this);
     }
 
+    /**
+     * Deserializes this itemstack from raw NBT bytes. NBT is safer for data migrations as it will
+     * use the built in data converter instead of bukkits dangerous serialization system.
+     *
+     * This expects that the DataVersion was stored on the root of the Compound, as saved from
+     * the {@link #serializeAsBytes()} API returned.
+     * @param bytes bytes representing an item in NBT
+     * @return ItemStack migrated to this version of Minecraft if needed.
+     */
+    @NotNull
+    public static ItemStack deserializeBytes(@NotNull byte[] bytes) {
+        return org.bukkit.Bukkit.getUnsafe().deserializeItem(bytes);
+    }
+
+    /**
+     * Serializes this itemstack to raw bytes in NBT. NBT is safer for data migrations as it will
+     * use the built in data converter instead of bukkits dangerous serialization system.
+     * @return bytes representing this item in NBT.
+     */
+    @NotNull
+    public byte[] serializeAsBytes() {
+        return org.bukkit.Bukkit.getUnsafe().serializeItem(this);
+    }
+
     /**
      * Gets the Display name as seen in the Client.
      * Currently the server only supports the English language. To override this,