papermc/Spigot-Server-Patches/0646-Remove-stale-POIs.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Sat, 9 Jan 2021 14:17:07 +0100
Subject: [PATCH] Remove stale POIs


diff --git a/src/main/java/net/minecraft/server/VillagePlace.java b/src/main/java/net/minecraft/server/VillagePlace.java
index b926cebd053bef829517c9d9bbf1c609c23ca04a..6a0f07b13eef5560dfc7c7b39618c0b825533aec 100644
--- a/src/main/java/net/minecraft/server/VillagePlace.java
+++ b/src/main/java/net/minecraft/server/VillagePlace.java
@@ -41,6 +41,7 @@ public class VillagePlace extends RegionFileSection<VillagePlaceSection> {
         ((VillagePlaceSection) this.e(SectionPosition.a(blockposition).s())).a(blockposition, villageplacetype);
     }
 
+    public void remove(BlockPosition blockposition) { this.a(blockposition); } // Paper - OBFHELPER
     public void a(BlockPosition blockposition) {
         ((VillagePlaceSection) this.e(SectionPosition.a(blockposition).s())).a(blockposition);
     }
@@ -125,6 +126,7 @@ public class VillagePlace extends RegionFileSection<VillagePlaceSection> {
         return ((VillagePlaceSection) this.e(SectionPosition.a(blockposition).s())).c(blockposition);
     }
 
+    public final boolean test(BlockPosition blockposition, Predicate<VillagePlaceType> predicate) { return this.a(blockposition, predicate); } // Paper - OBFHELPER
     public boolean a(BlockPosition blockposition, Predicate<VillagePlaceType> predicate) {
         return (Boolean) this.d(SectionPosition.a(blockposition).s()).map((villageplacesection) -> {
             return villageplacesection.a(blockposition, predicate);
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index 91d759fee68e8b285f912406fb338750c286f6a0..fbe7f43f6c1010e7a34114f8afb0e64934744335 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -1942,8 +1942,16 @@ public class WorldServer extends World implements GeneratorAccessSeed {
         Optional<VillagePlaceType> optional = VillagePlaceType.b(iblockdata);
         Optional<VillagePlaceType> optional1 = VillagePlaceType.b(iblockdata1);
 
+        // Paper start
+        BlockPosition blockposition1 = blockposition.immutableCopy();
+        this.getMinecraftServer().execute(() -> {
+                if (!optional.isPresent() && this.getPoiStorage().test(blockposition1, com.google.common.base.Predicates.alwaysTrue())) {
+                    this.getPoiStorage().remove(blockposition1);
+                }
+        });
         if (!Objects.equals(optional, optional1)) {
-            BlockPosition blockposition1 = blockposition.immutableCopy();
+            //BlockPosition blockposition1 = blockposition.immutableCopy();
+            // Paper end
 
             optional.ifPresent((villageplacetype) -> {
                 this.getMinecraftServer().execute(() -> {
@@ -1960,6 +1968,7 @@ public class WorldServer extends World implements GeneratorAccessSeed {
         }
     }
 
+    public final VillagePlace getPoiStorage() { return this.y(); } // Paper - OBFHELPER
     public VillagePlace y() {
         return this.getChunkProvider().j();
     }