Paper/patches/server/0919-Fix-certain-inventories-returning-null-Locations.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jake Potrebic <jake.m.potrebic@gmail.com>
Date: Wed, 15 Mar 2023 18:29:45 -0700
Subject: [PATCH] Fix certain inventories returning null Locations

Wandering Trader, AbstractHorse, Beacon and Composter inventories returned null locations
when a block or entity location is readily available

Co-authored-by: Lukas Planz <lukas.planz@web.de>

diff --git a/src/main/java/net/minecraft/world/SimpleContainer.java b/src/main/java/net/minecraft/world/SimpleContainer.java
index d5eeb2fcb119b815213aeffb3811d4a843502e50..061e870e0cdd5bf00351b7e8104361bce86809f3 100644
--- a/src/main/java/net/minecraft/world/SimpleContainer.java
+++ b/src/main/java/net/minecraft/world/SimpleContainer.java
@@ -63,6 +63,16 @@ public class SimpleContainer implements Container, StackedContentsCompatible {
 
     @Override
     public Location getLocation() {
+        // Paper start
+        // When the block inventory does not have a tile state that implements getLocation, e. g. composters
+        if (this.bukkitOwner instanceof org.bukkit.inventory.BlockInventoryHolder blockInventoryHolder) {
+            return blockInventoryHolder.getBlock().getLocation();
+        }
+        // When the bukkit owner is a bukkit entity, but does not implement Container itself, e. g. horses
+        if (this.bukkitOwner instanceof org.bukkit.entity.Entity entity) {
+            return entity.getLocation();
+        }
+        // Paper end
         return null;
     }
 
diff --git a/src/main/java/net/minecraft/world/inventory/BeaconMenu.java b/src/main/java/net/minecraft/world/inventory/BeaconMenu.java
index 0b1a0be964d799f1706c273092dc653fa04e8014..a6e712606ece631502ae4c7513403092df77524f 100644
--- a/src/main/java/net/minecraft/world/inventory/BeaconMenu.java
+++ b/src/main/java/net/minecraft/world/inventory/BeaconMenu.java
@@ -51,6 +51,12 @@ public class BeaconMenu extends AbstractContainerMenu {
             public int getMaxStackSize() {
                 return 1;
             }
+            // Paper start
+            @Override
+            public org.bukkit.Location getLocation() {
+                return context.getLocation();
+            }
+            // Paper end
         };
         checkContainerDataCount(propertyDelegate, 3);
         this.beaconData = propertyDelegate;
diff --git a/src/main/java/net/minecraft/world/inventory/MerchantContainer.java b/src/main/java/net/minecraft/world/inventory/MerchantContainer.java
index 083e50e27685f441ede4c75e913d671fe45d1d15..98cbcf67d8fdb1c80fb7ba8ba7734821e2818da6 100644
--- a/src/main/java/net/minecraft/world/inventory/MerchantContainer.java
+++ b/src/main/java/net/minecraft/world/inventory/MerchantContainer.java
@@ -65,7 +65,7 @@ public class MerchantContainer implements Container {
 
     @Override
     public Location getLocation() {
-        return (this.merchant instanceof Villager) ? ((Villager) this.merchant).getBukkitEntity().getLocation() : null;
+        return (this.merchant instanceof AbstractVillager) ? ((AbstractVillager) this.merchant).getBukkitEntity().getLocation() : null; // Paper
     }
     // CraftBukkit end