Implements NMS for pasting and supports older versions of server (#2110)

* Implements NMS for pasting and supports older versions of server

* Remove trial code that shouldn't have been committed.

* Remove trial code that shouldn't have been committed.

* Remove 1.19.3 support.

* Use 1.19.4 in POM

pom.xml

@@ -91,6 +91,7 @@
         <build.version>1.22.1</build.version>
         <sonar.organization>bentobox-world</sonar.organization>
         <sonar.host.url>https://sonarcloud.io</sonar.host.url>
+        <server.jars>${project.basedir}/lib</server.jars>
     </properties>
 
     <!-- Profiles will allow to automatically change build version. -->
@@ -312,7 +313,7 @@
             <version>3.2.2</version>
             <scope>provided</scope>
         </dependency>
-        <!-- Spigot NMS. Used for chunk deletion and pasting. -->
+        <!-- Spigot NMS. Used for chunk deletion and pasting.-->
         <dependency>
             <groupId>org.spigotmc</groupId>
             <artifactId>spigot</artifactId>

src/main/java/world/bentobox/bentobox/nms/SimpleWorldRegenerator.java

@@ -13,7 +13,6 @@ import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.bukkit.generator.BlockPopulator;
 import org.bukkit.generator.ChunkGenerator;
-import org.bukkit.generator.LimitedRegion;
 import org.bukkit.inventory.InventoryHolder;
 import org.bukkit.scheduler.BukkitRunnable;
 import org.bukkit.util.BoundingBox;

src/main/java/world/bentobox/bentobox/nms/v1_19_R3/PasteHandlerImpl.java

@@ -0,0 +1,82 @@
+package world.bentobox.bentobox.nms.v1_19_R3;
+
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.stream.Collectors;
+
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.World;
+import org.bukkit.block.Block;
+import org.bukkit.block.data.BlockData;
+import org.bukkit.craftbukkit.v1_19_R3.CraftWorld;
+import org.bukkit.craftbukkit.v1_19_R3.block.data.CraftBlockData;
+
+import net.minecraft.core.BlockPosition;
+import net.minecraft.world.level.block.state.IBlockData;
+import net.minecraft.world.level.chunk.Chunk;
+import world.bentobox.bentobox.blueprints.dataobjects.BlueprintBlock;
+import world.bentobox.bentobox.blueprints.dataobjects.BlueprintEntity;
+import world.bentobox.bentobox.database.objects.Island;
+import world.bentobox.bentobox.nms.PasteHandler;
+import world.bentobox.bentobox.util.DefaultPasteUtil;
+import world.bentobox.bentobox.util.Util;
+
+public class PasteHandlerImpl implements PasteHandler {
+
+    protected static final IBlockData AIR = ((CraftBlockData) Bukkit.createBlockData(Material.AIR)).getState();
+
+    @Override
+    public CompletableFuture<Void> pasteBlocks(Island island, World world, Map<Location, BlueprintBlock> blockMap) {
+        return blockMap.entrySet().stream()
+                .map(entry -> setBlock(island, entry.getKey(), entry.getValue()))
+                .collect(
+                        Collectors.collectingAndThen(
+                                Collectors.toList(),
+                                list -> CompletableFuture.allOf(list.toArray(new CompletableFuture[0]))
+                                )
+                        );
+    }
+
+    @Override
+    public CompletableFuture<Void> pasteEntities(Island island, World world, Map<Location, List<BlueprintEntity>> entityMap) {
+        return entityMap.entrySet().stream()
+                .map(entry -> DefaultPasteUtil.setEntity(island, entry.getKey(), entry.getValue()))
+                .collect(
+                        Collectors.collectingAndThen(
+                                Collectors.toList(),
+                                list -> CompletableFuture.allOf(list.toArray(new CompletableFuture[0]))
+                                )
+                        );
+    }
+
+    /**
+     * Set the block to the location
+     *
+     * @param island   - island
+     * @param location - location
+     * @param bpBlock  - blueprint block
+     */
+    public static CompletableFuture<Void> setBlock(Island island, Location location, BlueprintBlock bpBlock) {
+        return Util.getChunkAtAsync(location).thenRun(() -> {
+            Block block = location.getBlock();
+            // Set the block data - default is AIR
+            BlockData bd = DefaultPasteUtil.createBlockData(bpBlock);
+            CraftBlockData craft = (CraftBlockData) bd;
+            net.minecraft.world.level.World nmsWorld = ((CraftWorld) location.getWorld()).getHandle();
+            Chunk nmsChunk = nmsWorld.d(location.getBlockX() >> 4, location.getBlockZ() >> 4);
+            BlockPosition bp = new BlockPosition(location.getBlockX(), location.getBlockY(), location.getBlockZ());
+            // Setting the block to air before setting to another state prevents some console errors
+            nmsChunk.a(bp, AIR, false);
+            nmsChunk.a(bp, craft.getState(), false);
+            block.setBlockData(bd, false);
+            DefaultPasteUtil.setBlockState(island, block, bpBlock);
+            // Set biome
+            if (bpBlock.getBiome() != null) {
+                block.setBiome(bpBlock.getBiome());
+            }
+        });
+    }
+}

src/main/java/world/bentobox/bentobox/util/Util.java

@@ -738,6 +738,32 @@ public class Util {
         }
         return regenerator;
     }
+    
+    /**
+     * Checks what version the server is running and picks the appropriate NMS handler, or fallback
+     * @return PasteHandler
+     */
+    public static PasteHandler getPasteHandler() {
+        if (pasteHandler == null) {
+            String serverPackageName = Bukkit.getServer().getClass().getPackage().getName();
+            String pluginPackageName = plugin.getClass().getPackage().getName();
+            String version = serverPackageName.substring(serverPackageName.lastIndexOf('.') + 1);
+            PasteHandler handler;
+            try {
+                Class<?> clazz = Class.forName(pluginPackageName + ".nms." + version + ".PasteHandlerImpl");
+                if (PasteHandler.class.isAssignableFrom(clazz)) {
+                    handler = (PasteHandler) clazz.getConstructor().newInstance();
+                } else {
+                    throw new IllegalStateException("Class " + clazz.getName() + " does not implement PasteHandler");
+                }
+            } catch (Exception e) {
+                plugin.logWarning("No PasteHandler found for " + version + ", falling back to Bukkit API.");
+                handler = new world.bentobox.bentobox.nms.fallback.PasteHandlerImpl();
+            }
+            setPasteHandler(handler);
+        }
+        return pasteHandler;
+    }
 
     /**
      * Set the paste handler the plugin will use
@@ -747,17 +773,6 @@ public class Util {
         Util.pasteHandler = pasteHandler;
     }
 
-    /**
-     * Get the paste handler the plugin will use
-     * @return an NMS accelerated class for this server
-     */
-    public static PasteHandler getPasteHandler() {
-        if (pasteHandler == null) {
-            setPasteHandler(new world.bentobox.bentobox.nms.fallback.PasteHandlerImpl());
-        }
-        return pasteHandler;
-    }
-
     /**
      * Broadcast a localized message to all players with the permission {@link Server#BROADCAST_CHANNEL_USERS}
      *

src/main/resources/plugin.yml

@@ -60,3 +60,4 @@ permissions:
   bentobox.version:
     description: Allows to use /bentobox version
     default: op
+