Purpur/patches/server/0182-Store-placer-on-Block-when-placed.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Sat, 3 Jul 2021 18:40:32 -0500
Subject: [PATCH] Store placer on Block when placed


diff --git a/src/main/java/net/minecraft/world/item/ItemStack.java b/src/main/java/net/minecraft/world/item/ItemStack.java
index 095c86ea25fc4f385d96d2e92fa67a150e27c489..5964c2e77e9f21c72d9e0655e5f48d2798317779 100644
--- a/src/main/java/net/minecraft/world/item/ItemStack.java
+++ b/src/main/java/net/minecraft/world/item/ItemStack.java
@@ -508,6 +508,7 @@ public final class ItemStack implements DataComponentHolder {
                     world.isBlockPlaceCancelled = true; // Paper - prevent calling cleanup logic when undoing a block place upon a cancelled BlockPlaceEvent
                         for (BlockState blockstate : blocks) {
                             blockstate.update(true, false);
+                        ((CraftBlock) blockstate.getBlock()).getNMS().getBlock().forgetPlacer(); // Purpur
                         }
                     world.isBlockPlaceCancelled = false; // Paper - prevent calling cleanup logic when undoing a block place upon a cancelled BlockPlaceEvent
                         world.preventPoiUpdated = false;
@@ -540,6 +541,7 @@ public final class ItemStack implements DataComponentHolder {
                             if (!(block.getBlock() instanceof BaseEntityBlock)) { // Containers get placed automatically
                                 block.onPlace(world, newblockposition, oldBlock, true, context);
                             }
+                        block.getBlock().forgetPlacer(); // Purpur
 
                             world.notifyAndUpdatePhysics(newblockposition, null, oldBlock, block, world.getBlockState(newblockposition), updateFlag, 512); // send null chunk as chunk.k() returns false by this point
                         }
diff --git a/src/main/java/net/minecraft/world/level/block/Block.java b/src/main/java/net/minecraft/world/level/block/Block.java
index c0b1f903962b25d8ff6c2b4fcd2be0e45de09b35..17a157e2dcd977c9f7d886f8867056e88962c32e 100644
--- a/src/main/java/net/minecraft/world/level/block/Block.java
+++ b/src/main/java/net/minecraft/world/level/block/Block.java
@@ -433,7 +433,17 @@ public class Block extends BlockBehaviour implements ItemLike {
         } // Paper - fix drops not preventing stats/food exhaustion
     }
 
-    public void setPlacedBy(Level world, BlockPos pos, BlockState state, @Nullable LivingEntity placer, ItemStack itemStack) {}
+    // Purpur start
+    @Nullable protected LivingEntity placer = null;
+
+    public void setPlacedBy(Level world, BlockPos pos, BlockState state, @Nullable LivingEntity placer, ItemStack itemStack) {
+        this.placer = placer;
+    }
+
+    public void forgetPlacer() {
+        this.placer = null;
+    }
+    // Purpur end
 
     public boolean isPossibleToRespawnInThis(BlockState state) {
         return !state.isSolid() && !state.liquid();