Add Structure check API (#9062)

patches/api/0450-Add-Structure-check-API.patch

@@ -0,0 +1,41 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <jake.m.potrebic@gmail.com>
+Date: Mon, 27 Mar 2023 10:20:06 -0700
+Subject: [PATCH] Add Structure check API
+
+
+diff --git a/src/main/java/org/bukkit/World.java b/src/main/java/org/bukkit/World.java
+index f72f0f0f8eee95f95adc969d55ba7de82ee30e2a..567a36a4887da8994c9170e2885aa8cc357efa0c 100644
+--- a/src/main/java/org/bukkit/World.java
++++ b/src/main/java/org/bukkit/World.java
+@@ -76,6 +76,30 @@ public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient
+      */
+     int getPlayerCount();
+     // Paper end
++    // Paper start - structure check API
++    /**
++     * Check if the naturally-generated structure exists at the position.
++     * <p>
++     * Note that if the position is not loaded, this may cause chunk loads/generation
++     * to check if a structure is at that position. Use {@link #isPositionLoaded(io.papermc.paper.math.Position)}
++     * to check if a position is loaded
++     *
++     * @param position the position to check at
++     * @param structure the structure to check for
++     * @return true if that structure exists at the position
++     */
++    boolean hasStructureAt(io.papermc.paper.math.@NotNull Position position, @NotNull Structure structure);
++
++    /**
++     * Checks if this position is loaded.
++     *
++     * @param position position to check
++     * @return true if loaded
++     */
++    default boolean isPositionLoaded(io.papermc.paper.math.@NotNull Position position) {
++        return this.isChunkLoaded(position.blockX() >> 4, position.blockZ() >> 4);
++    }
++    // Paper end
+ 
+     /**
+      * Gets the {@link Block} at the given coordinates

patches/server/1057-Add-Structure-check-API.patch

@@ -0,0 +1,23 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <jake.m.potrebic@gmail.com>
+Date: Mon, 27 Mar 2023 10:20:00 -0700
+Subject: [PATCH] Add Structure check API
+
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+index f19f2199cac5a7eb275f40cc23472416a40ec0da..90c76ddcb8af13409490b8976263d27a71954668 100644
+--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
++++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+@@ -230,6 +230,12 @@ public class CraftWorld extends CraftRegionAccessor implements World {
+         };
+     }
+     // Paper end
++    // Paper start - structure check API
++    @Override
++    public boolean hasStructureAt(final io.papermc.paper.math.Position position, final Structure structure) {
++        return this.world.structureManager().getStructureWithPieceAt(io.papermc.paper.util.MCUtil.toBlockPos(position), net.minecraft.resources.ResourceKey.create(net.minecraft.core.registries.Registries.STRUCTURE, CraftNamespacedKey.toMinecraft(structure.getKey()))).isValid();
++    }
++    // Paper end
+ 
+     private static final Random rand = new Random();
+