Fix paper-implementation not detecting additional worlds correctly

Author: TBlueF

implementations/paper/src/main/java/de/bluecolored/bluemap/bukkit/BukkitPlugin.java

@@ -109,6 +109,14 @@ public BukkitPlugin() {
     @Override
     public void onEnable() {
 
+        //save world so the level.dat is present on new worlds
+        if (!FoliaSupport.IS_FOLIA) {
+            Logger.global.logInfo("Saving all worlds once, to make sure the level.dat is present...");
+            for (World world : getServer().getWorlds()) {
+                world.save();
+            }
+        }
+
         //register events
         getServer().getPluginManager().registerEvents(this, this);
         getServer().getPluginManager().registerEvents(eventForwarder, this);

implementations/paper/src/main/java/de/bluecolored/bluemap/bukkit/BukkitWorld.java

@@ -25,6 +25,7 @@
 package de.bluecolored.bluemap.bukkit;
 
 import de.bluecolored.bluemap.common.serverinterface.ServerWorld;
+import de.bluecolored.bluemap.core.resources.datapack.DataPack;
 import de.bluecolored.bluemap.core.util.Key;
 import de.bluecolored.bluemap.core.world.mca.MCAWorld;
 import org.bukkit.World;
@@ -43,8 +44,15 @@ public BukkitWorld(World delegate) {
         this.delegate = new WeakReference<>(delegate);
         Path worldFolder = delegate.getWorldFolder().toPath();
 
-        var id = delegate.key();
-        this.dimension = new Key(id.namespace(), id.value());
+        this.dimension = switch (delegate.getEnvironment()) {
+            case NORMAL -> DataPack.DIMENSION_OVERWORLD;
+            case NETHER -> DataPack.DIMENSION_THE_NETHER;
+            case THE_END -> DataPack.DIMENSION_THE_END;
+            case CUSTOM -> {
+                var id = delegate.key();
+                yield new Key(id.namespace(), id.value());
+            }
+        };
 
         // fix for hybrids
         Path dimensionFolder = MCAWorld.resolveDimensionFolder(worldFolder, dimension);
@@ -58,17 +66,18 @@ public BukkitWorld(World delegate) {
         this.worldFolder = worldFolder;
     }
 
-    /* Not supported by folia
     @Override
     public boolean persistWorldChanges() {
-        World world = delegate.get();
-        if (world != null) {
-            world.save();
-            return true;
+        if (!FoliaSupport.IS_FOLIA) {
+            World world = delegate.get();
+            if (world != null) {
+                world.save();
+                return true;
+            }
         }
+
         return false;
     }
-    */
 
     @Override
     public Path getWorldFolder() {

implementations/paper/src/main/java/de/bluecolored/bluemap/bukkit/FoliaSupport.java

@@ -0,0 +1,19 @@
+package de.bluecolored.bluemap.bukkit;
+
+import de.bluecolored.bluemap.core.logger.Logger;
+
+public class FoliaSupport {
+
+    public static final boolean IS_FOLIA = isFolia();
+
+    private static boolean isFolia() {
+        try {
+            Class.forName("io.papermc.paper.threadedregions.RegionizedServer");
+            Logger.global.logInfo("Folia detected, enabling folia-support mode.");
+            return true;
+        } catch (ClassNotFoundException e) {
+            return false;
+        }
+    }
+
+}