Fix issue where seed worlds lost generators with Multiverse on restart

Author: tastybento

src/main/java/world/bentobox/bentobox/api/panels/Panel.java

@@ -32,16 +32,24 @@ public class Panel implements HeadRequester, InventoryHolder {
     private World world;
 
     /**
-     * Various types of Panel that can be created.
+     * Various types of Panels that can be created that use InventoryTypes.
+     * <br>
+     * The current list of inventories that cannot be created are:<br>
+     * <blockquote>
+     *     {@link Type#INVENTORY}, {@link Type#HOPPER} and
+     *     {@link Type#DROPPER}
+     * </blockquote>
+     *
+     * These relate to the Bukkit inventories with INVENTORY being the standard CHEST inventory.
+     * See {@link org.bukkit.event.inventory.InventoryType}.
      * @since 1.7.0
      */
     public enum Type {
-        INVENTORY,
-        HOPPER,
-        DROPPER
+        INVENTORY, HOPPER, DROPPER
     }
 
-    public Panel() {}
+    public Panel() {
+    }
 
     public Panel(String name, Map<Integer, PanelItem> items, int size, User user, PanelListener listener) {
         this(name, items, size, user, listener, Type.INVENTORY);
@@ -65,28 +73,27 @@ public Panel(PanelBuilder pb) {
                 pb.getUser(), pb.getListener(), pb.getPanelType());
     }
 
-    protected void makePanel(String name, Map<Integer, PanelItem> items, int size, User user,
-            PanelListener listener) {
+    protected void makePanel(String name, Map<Integer, PanelItem> items, int size, User user, PanelListener listener) {
         this.makePanel(name, items, size, user, listener, Type.INVENTORY);
     }
 
     /**
      * @since 1.7.0
      */
-    protected void makePanel(String name, Map<Integer, PanelItem> items, int size, User user,
-            PanelListener listener, Type type) {
+    protected void makePanel(String name, Map<Integer, PanelItem> items, int size, User user, PanelListener listener,
+            Type type) {
         this.name = name;
         this.items = items;
 
         // Create panel
         switch (type) {
-            case INVENTORY -> inventory = Bukkit.createInventory(null, fixSize(size), name);
-            case HOPPER -> inventory = Bukkit.createInventory(null, InventoryType.HOPPER, name);
-            case DROPPER -> inventory = Bukkit.createInventory(null, InventoryType.DROPPER, name);
+        case INVENTORY -> inventory = Bukkit.createInventory(null, fixSize(size), name);
+        case HOPPER -> inventory = Bukkit.createInventory(null, InventoryType.HOPPER, name);
+        case DROPPER -> inventory = Bukkit.createInventory(null, InventoryType.DROPPER, name);
         }
 
         // Fill the inventory and return
-        for (Map.Entry<Integer, PanelItem> en: items.entrySet()) {
+        for (Map.Entry<Integer, PanelItem> en : items.entrySet()) {
             if (en.getKey() < 54) {
                 inventory.setItem(en.getKey(), en.getValue().getItem());
                 // Get player head async
@@ -97,11 +104,13 @@ protected void makePanel(String name, Map<Integer, PanelItem> items, int size, U
         }
         this.listener = listener;
         // If the listener is defined, then run setup
-        if (listener != null) listener.setup();
+        if (listener != null)
+            listener.setup();
 
         // If the user is defined, then open panel immediately
         this.user = user;
-        if (user != null) this.open(user);
+        if (user != null)
+            this.open(user);
     }
 
     private int fixSize(int size) {
@@ -113,7 +122,8 @@ private int fixSize(int size) {
             // Make sure size is a multiple of 9 and is 54 max.
             size = size + 8;
             size -= (size % 9);
-            if (size > 54) size = 54;
+            if (size > 54)
+                size = 54;
         } else {
             return 9;
         }
@@ -194,12 +204,10 @@ public void setUser(User user) {
     public void setHead(PanelItem item) {
         // Update the panel item
         // Find panel item index in items and replace it once more in inventory to update it.
-        this.items.entrySet().stream().
-        filter(entry -> entry.getValue() == item).
-        mapToInt(Map.Entry::getKey).findFirst()
-        .ifPresent(index ->
-        // Update item inside inventory to change icon only if item is inside panel.
-        this.inventory.setItem(index, item.getItem()));
+        this.items.entrySet().stream().filter(entry -> entry.getValue() == item).mapToInt(Map.Entry::getKey).findFirst()
+                .ifPresent(index ->
+                // Update item inside inventory to change icon only if item is inside panel.
+                this.inventory.setItem(index, item.getItem()));
     }
 
     /**
@@ -226,5 +234,4 @@ public void setWorld(World world) {
         this.world = world;
     }
 
-
 }

src/main/java/world/bentobox/bentobox/hooks/MultiverseCoreHook.java

@@ -32,8 +32,12 @@ public MultiverseCoreHook() {
     public void registerWorld(World world, boolean islandWorld) {
         if (islandWorld) {
             // Only register generator if one is defined in the addon (is not null)
-            String generator = BentoBox.getInstance().getIWM().getAddon(world).map(gm -> gm.getDefaultWorldGenerator(world.getName(), "") != null).orElse(false) ? " -g " + BentoBox.getInstance().getName() : "";
-            String cmd1 = MULTIVERSE_IMPORT + world.getName() + " " + world.getEnvironment().name().toLowerCase(Locale.ENGLISH) + generator;
+            String generator = BentoBox.getInstance().getIWM().getAddon(world)
+                    .map(gm -> gm.getDefaultWorldGenerator(world.getName(), "") != null).orElse(false)
+                            ? " -g " + BentoBox.getInstance().getName()
+                            : "";
+            String cmd1 = MULTIVERSE_IMPORT + world.getName() + " "
+                    + world.getEnvironment().name().toLowerCase(Locale.ENGLISH) + generator;
             String cmd2 = MULTIVERSE_SET_GENERATOR + BentoBox.getInstance().getName() + " " + world.getName();
             Bukkit.getServer().dispatchCommand(Bukkit.getServer().getConsoleSender(), cmd1);
             if (!generator.isEmpty()) {
@@ -42,7 +46,8 @@ public void registerWorld(World world, boolean islandWorld) {
             }
         } else {
             // Set the generator to null - this will remove any previous registration
-            String cmd1 = MULTIVERSE_IMPORT + world.getName() + " " + world.getEnvironment().name().toLowerCase(Locale.ENGLISH);
+            String cmd1 = MULTIVERSE_IMPORT + world.getName() + " "
+                    + world.getEnvironment().name().toLowerCase(Locale.ENGLISH);
             String cmd2 = MULTIVERSE_SET_GENERATOR + "null " + world.getName();
             Bukkit.getServer().dispatchCommand(Bukkit.getServer().getConsoleSender(), cmd1);
             Bukkit.getServer().dispatchCommand(Bukkit.getServer().getConsoleSender(), cmd2);

src/main/java/world/bentobox/bentobox/managers/AddonsManager.java

@@ -378,6 +378,8 @@ private void seedWorld(GameModeAddon gameMode, @NonNull World world) {
         World w = gameMode.getWorldSettings().isUseOwnGenerator() ? wc.createWorld()
                 : wc.generator(world.getGenerator()).createWorld();
         w.setDifficulty(Difficulty.PEACEFUL);
+        // Register seed world
+        plugin.getIWM().addWorld(w, gameMode);
     }
 
     /**