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Paper/patches/server/0496-Add-StructuresLocateEvent.patch
Owen 89d51d5f29
Allow enabling sand duping (#10191) 
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable.

It should be noted that this decision does not promise all future exploits will be configurable.
2024-03-03 17:05:34 -05:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: dfsek <dfsek@protonmail.com>
Date: Wed, 16 Sep 2020 01:12:29 -0700
Subject: [PATCH] Add StructuresLocateEvent
Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>
diff --git a/src/main/java/io/papermc/paper/world/structure/PaperConfiguredStructure.java b/src/main/java/io/papermc/paper/world/structure/PaperConfiguredStructure.java
new file mode 100644
index 0000000000000000000000000000000000000000..2667067fd13f61e0464ba88ae4e4a7078351d1a8
--- /dev/null
+++ b/src/main/java/io/papermc/paper/world/structure/PaperConfiguredStructure.java
@@ -0,0 +1,35 @@
+package io.papermc.paper.world.structure;
+
+import java.util.Objects;
+import net.minecraft.core.Registry;
+import net.minecraft.core.registries.BuiltInRegistries;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.level.levelgen.structure.Structure;
+import org.bukkit.NamespacedKey;
+import org.bukkit.StructureType;
+import org.bukkit.craftbukkit.CraftRegistry;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.checkerframework.framework.qual.DefaultQualifier;
+
+@DefaultQualifier(NonNull.class)
+@Deprecated(forRemoval = true)
+public final class PaperConfiguredStructure {
+
+ private PaperConfiguredStructure() {
+ }
+
+ @Deprecated(forRemoval = true)
+ public static final class LegacyRegistry extends CraftRegistry<ConfiguredStructure, Structure> {
+
+ public LegacyRegistry(final Registry<Structure> minecraftRegistry) {
+ super(ConfiguredStructure.class, minecraftRegistry, LegacyRegistry::minecraftToBukkit);
+ }
+
+ private static @Nullable ConfiguredStructure minecraftToBukkit(NamespacedKey key, Structure nms) {
+ final ResourceLocation structureTypeLoc = Objects.requireNonNull(BuiltInRegistries.STRUCTURE_TYPE.getKey(nms.type()), "unexpected structure type " + nms.type());
+ final @Nullable StructureType structureType = StructureType.getStructureTypes().get(structureTypeLoc.getPath());
+ return structureType == null ? null : new ConfiguredStructure(key, structureType);
+ }
+ }
+}
diff --git a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
index 3e57142dd9cb23d43857d5a4cb30962e4b696b74..a6d5b3fa7e3437e0aec54eec4079e9f3267c64b8 100644
--- a/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
+++ b/src/main/java/net/minecraft/world/level/chunk/ChunkGenerator.java
@@ -121,6 +121,24 @@ public abstract class ChunkGenerator {
@Nullable
public Pair<BlockPos, Holder<Structure>> findNearestMapStructure(ServerLevel world, HolderSet<Structure> structures, BlockPos center, int radius, boolean skipReferencedStructures) {
+ // Paper start - StructuresLocateEvent
+ final org.bukkit.World bukkitWorld = world.getWorld();
+ final org.bukkit.Location origin = io.papermc.paper.util.MCUtil.toLocation(world, center);
+ final List<org.bukkit.generator.structure.Structure> apiStructures = structures.stream().map(Holder::value).map(nms -> org.bukkit.craftbukkit.generator.structure.CraftStructure.minecraftToBukkit(nms)).toList();
+ if (!apiStructures.isEmpty()) {
+ final io.papermc.paper.event.world.StructuresLocateEvent event = new io.papermc.paper.event.world.StructuresLocateEvent(bukkitWorld, origin, apiStructures, radius, skipReferencedStructures);
+ if (!event.callEvent()) {
+ return null;
+ }
+ if (event.getResult() != null) {
+ return Pair.of(io.papermc.paper.util.MCUtil.toBlockPos(event.getResult().pos()), world.registryAccess().registryOrThrow(Registries.STRUCTURE).wrapAsHolder(org.bukkit.craftbukkit.generator.structure.CraftStructure.bukkitToMinecraft(event.getResult().structure())));
+ }
+ center = io.papermc.paper.util.MCUtil.toBlockPosition(event.getOrigin());
+ radius = event.getRadius();
+ skipReferencedStructures = event.shouldFindUnexplored();
+ structures = HolderSet.direct(api -> world.registryAccess().registryOrThrow(Registries.STRUCTURE).wrapAsHolder(org.bukkit.craftbukkit.generator.structure.CraftStructure.bukkitToMinecraft(api)), event.getStructures());
+ }
+ // Paper end
ChunkGeneratorStructureState chunkgeneratorstructurestate = world.getChunkSource().getGeneratorState();
Map<StructurePlacement, Set<Holder<Structure>>> map = new Object2ObjectArrayMap();
Iterator iterator = structures.iterator();
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftRegistry.java b/src/main/java/org/bukkit/craftbukkit/CraftRegistry.java
index 110987de809339b4ce14eaf377782ebf3460164a..b12b99253543445475b73a1d3d7c6364856b49e8 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftRegistry.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftRegistry.java
@@ -120,6 +120,11 @@ public class CraftRegistry<B extends Keyed, M> implements Registry<B> {
return new CraftRegistry<>(DamageType.class, registryHolder.registryOrThrow(Registries.DAMAGE_TYPE), CraftDamageType::new);
}
// TODO registry modification API
+ // Paper start - remove this after a while along with all ConfiguredStructure stuff
+ if (bukkitClass == io.papermc.paper.world.structure.ConfiguredStructure.class) {
+ return new io.papermc.paper.world.structure.PaperConfiguredStructure.LegacyRegistry(registryHolder.registryOrThrow(Registries.STRUCTURE));
+ }
+ // Paper end
return null;
}
diff --git a/src/test/java/io/papermc/paper/world/structure/ConfiguredStructureTest.java b/src/test/java/io/papermc/paper/world/structure/ConfiguredStructureTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..9178fe0d01b998ca1442bf2511f8fc00db9388ba
--- /dev/null
+++ b/src/test/java/io/papermc/paper/world/structure/ConfiguredStructureTest.java
@@ -0,0 +1,96 @@
+package io.papermc.paper.world.structure;
+
+import io.papermc.paper.registry.Reference;
+import net.minecraft.core.Registry;
+import net.minecraft.core.registries.Registries;
+import net.minecraft.resources.ResourceKey;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.server.Bootstrap;
+import net.minecraft.world.level.levelgen.structure.Structure;
+import net.minecraft.world.level.levelgen.structure.BuiltinStructures;
+import org.bukkit.NamespacedKey;
+import org.bukkit.craftbukkit.util.CraftNamespacedKey;
+import org.bukkit.support.AbstractTestingBase;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import java.io.PrintStream;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.StringJoiner;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+@Deprecated(forRemoval = true)
+public class ConfiguredStructureTest extends AbstractTestingBase {
+
+ private static final Map<ResourceLocation, String> BUILT_IN_STRUCTURES = new LinkedHashMap<>();
+ private static final Map<NamespacedKey, Reference<?>> DEFAULT_CONFIGURED_STRUCTURES = new LinkedHashMap<>();
+
+ private static PrintStream out;
+
+ @BeforeAll
+ public static void collectStructures() throws ReflectiveOperationException {
+ out = System.out;
+ System.setOut(Bootstrap.STDOUT);
+ for (Field field : BuiltinStructures.class.getDeclaredFields()) {
+ if (field.getType().equals(ResourceKey.class) && Modifier.isStatic(field.getModifiers())) {
+ BUILT_IN_STRUCTURES.put(((ResourceKey<?>) field.get(null)).location(), field.getName());
+ }
+ }
+ for (Field field : ConfiguredStructure.class.getDeclaredFields()) {
+ if (field.getType().equals(Reference.class) && Modifier.isStatic(field.getModifiers())) {
+ final Reference<?> ref = (Reference<?>) field.get(null);
+ DEFAULT_CONFIGURED_STRUCTURES.put(ref.getKey(), ref);
+ }
+ }
+ }
+
+ @Test
+ public void testMinecraftToApi() {
+ Registry<Structure> structureRegistry = AbstractTestingBase.REGISTRY_CUSTOM.registryOrThrow(Registries.STRUCTURE);
+ assertEquals(BUILT_IN_STRUCTURES.size(), structureRegistry.size(), "configured structure maps should be the same size");
+
+ Map<ResourceLocation, Structure> missing = new LinkedHashMap<>();
+ for (Structure feature : structureRegistry) {
+ final ResourceLocation key = structureRegistry.getKey(feature);
+ assertNotNull(key, "Missing built-in registry key");
+ if (key.equals(BuiltinStructures.ANCIENT_CITY.location()) || key.equals(BuiltinStructures.TRAIL_RUINS.location()) || key.equals(BuiltinStructures.TRIAL_CHAMBERS.location())) {
+ continue; // TODO remove when upstream adds "jigsaw" StructureType
+ }
+ if (DEFAULT_CONFIGURED_STRUCTURES.get(CraftNamespacedKey.fromMinecraft(key)) == null) {
+ missing.put(key, feature);
+ }
+ }
+
+ assertTrue(missing.isEmpty(), printMissing(missing));
+ }
+
+ @Test
+ public void testApiToMinecraft() {
+ Registry<Structure> structureRegistry = AbstractTestingBase.REGISTRY_CUSTOM.registryOrThrow(Registries.STRUCTURE);
+ for (NamespacedKey apiKey : DEFAULT_CONFIGURED_STRUCTURES.keySet()) {
+ assertTrue(structureRegistry.containsKey(CraftNamespacedKey.toMinecraft(apiKey)), apiKey + " does not have a minecraft counterpart");
+ }
+ }
+
+ private static String printMissing(Map<ResourceLocation, Structure> missing) {
+ final StringJoiner joiner = new StringJoiner("\n", "Missing: \n", "");
+
+ missing.forEach((key, configuredFeature) -> {
+ joiner.add("public static final Reference<ConfiguredStructure> " + BUILT_IN_STRUCTURES.get(key) + " = create(\"" + key.getPath() + "\");");
+ });
+
+ return joiner.toString();
+ }
+
+ @AfterAll
+ public static void after() {
+ System.setOut(out);
+ }
+}
diff --git a/src/test/java/org/bukkit/registry/PerRegistryTest.java b/src/test/java/org/bukkit/registry/PerRegistryTest.java
index 4e4ea083063daf22f1bb785ef212958ea889c43b..1c4966520b6401e6571aa44d5934dfa280bc80e3 100644
--- a/src/test/java/org/bukkit/registry/PerRegistryTest.java
+++ b/src/test/java/org/bukkit/registry/PerRegistryTest.java
@@ -36,6 +36,7 @@ public class PerRegistryTest extends AbstractTestingBase {
if (!(object instanceof CraftRegistry<?, ?> registry)) {
continue;
}
+ if (object instanceof io.papermc.paper.world.structure.PaperConfiguredStructure.LegacyRegistry) continue; // Paper - skip
data.add(Arguments.of(registry));
} catch (ReflectiveOperationException e) {
diff --git a/src/test/java/org/bukkit/registry/RegistryArgumentAddedTest.java b/src/test/java/org/bukkit/registry/RegistryArgumentAddedTest.java
index 4adaafafb7140e983a4e90f0ff0deaaf0887a9a5..65cc33c45553e755371ec4313dd38bb61eb7d61c 100644
--- a/src/test/java/org/bukkit/registry/RegistryArgumentAddedTest.java
+++ b/src/test/java/org/bukkit/registry/RegistryArgumentAddedTest.java
@@ -23,6 +23,7 @@ public class RegistryArgumentAddedTest extends AbstractTestingBase {
Set<Class<?>> loadedRegistries = new HashSet<>(DummyServer.registers.keySet());
Set<Class<?>> notFound = new HashSet<>();
+ loadedRegistries.remove(io.papermc.paper.world.structure.ConfiguredStructure.class); // Paper - ignore
RegistriesArgumentProvider
.getData()
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