From 724ec10f3358924e348e96fe51dffe41c91780e5 Mon Sep 17 00:00:00 2001
From: md_5 <git@md-5.net>
Date: Thu, 25 Apr 2019 13:57:18 +1000
Subject: [PATCH] SPIGOT-4741: InventoryHolder no longer returns DoubleChest

---
 nms-patches/BlockChest.patch                  | 67 +++++++++++++++++++
 .../bukkit/craftbukkit/block/CraftChest.java  |  4 +-
 2 files changed, 69 insertions(+), 2 deletions(-)
 create mode 100644 nms-patches/BlockChest.patch

diff --git a/nms-patches/BlockChest.patch b/nms-patches/BlockChest.patch
new file mode 100644
index 0000000000..468567f4d9
--- /dev/null
+++ b/nms-patches/BlockChest.patch
@@ -0,0 +1,67 @@
+--- a/net/minecraft/server/BlockChest.java
++++ b/net/minecraft/server/BlockChest.java
+@@ -30,24 +30,7 @@
+         public ITileInventory b(final TileEntityChest tileentitychest, final TileEntityChest tileentitychest1) {
+             final InventoryLargeChest inventorylargechest = new InventoryLargeChest(tileentitychest, tileentitychest1);
+ 
+-            return new ITileInventory() {
+-                @Nullable
+-                @Override
+-                public Container createMenu(int i, PlayerInventory playerinventory, EntityHuman entityhuman) {
+-                    if (tileentitychest.e(entityhuman) && tileentitychest1.e(entityhuman)) {
+-                        tileentitychest.d(playerinventory.player);
+-                        tileentitychest1.d(playerinventory.player);
+-                        return ContainerChest.b(i, playerinventory, inventorylargechest);
+-                    } else {
+-                        return null;
+-                    }
+-                }
+-
+-                @Override
+-                public IChatBaseComponent getScoreboardDisplayName() {
+-                    return new ChatMessage("container.chestDouble", new Object[0]);
+-                }
+-            };
++            return new DoubleInventory(tileentitychest, tileentitychest1, inventorylargechest); // CraftBukkit
+         }
+ 
+         @Override
+@@ -56,6 +39,38 @@
+         }
+     };
+ 
++    // CraftBukkit start
++    public static class DoubleInventory implements ITileInventory {
++
++        private final TileEntityChest tileentitychest;
++        private final TileEntityChest tileentitychest1;
++        public final InventoryLargeChest inventorylargechest;
++
++        public DoubleInventory(TileEntityChest tileentitychest, TileEntityChest tileentitychest1, InventoryLargeChest inventorylargechest) {
++            this.tileentitychest = tileentitychest;
++            this.tileentitychest1 = tileentitychest1;
++            this.inventorylargechest = inventorylargechest;
++        }
++
++        @Nullable
++        @Override
++        public Container createMenu(int i, PlayerInventory playerinventory, EntityHuman entityhuman) {
++            if (tileentitychest.e(entityhuman) && tileentitychest1.e(entityhuman)) {
++                tileentitychest.d(playerinventory.player);
++                tileentitychest1.d(playerinventory.player);
++                return ContainerChest.b(i, playerinventory, inventorylargechest);
++            } else {
++                return null;
++            }
++        }
++
++        @Override
++        public IChatBaseComponent getScoreboardDisplayName() {
++            return new ChatMessage("container.chestDouble", new Object[0]);
++        }
++    };
++    // CraftBukkit end
++
+     protected BlockChest(Block.Info block_info) {
+         super(block_info);
+         this.o((IBlockData) ((IBlockData) ((IBlockData) ((IBlockData) this.blockStateList.getBlockData()).set(BlockChest.FACING, EnumDirection.NORTH)).set(BlockChest.b, BlockPropertyChestType.SINGLE)).set(BlockChest.c, false));
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftChest.java b/src/main/java/org/bukkit/craftbukkit/block/CraftChest.java
index 142521a172..0e8f1a89fc 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftChest.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftChest.java
@@ -50,8 +50,8 @@ public class CraftChest extends CraftLootable<TileEntityChest> implements Chest
         BlockChest blockChest = (BlockChest) (this.getType() == Material.CHEST ? Blocks.CHEST : Blocks.TRAPPED_CHEST);
         ITileInventory nms = blockChest.getInventory(data, world.getHandle(), this.getPosition());
 
-        if (nms instanceof InventoryLargeChest) {
-            inventory = new CraftInventoryDoubleChest((InventoryLargeChest) nms);
+        if (nms instanceof BlockChest.DoubleInventory) {
+            inventory = new CraftInventoryDoubleChest(((BlockChest.DoubleInventory) nms).inventorylargechest);
         }
         return inventory;
     }