Made opening the gui's async

src/main/java/com/alttd/GUI/windows/BuyGUI.java

@@ -2,6 +2,7 @@ package com.alttd.GUI.windows;
 
 import com.alttd.GUI.GUIMerchant;
 import com.alttd.config.Config;
+import com.alttd.objects.Price;
 import com.alttd.objects.VillagerType;
 import com.alttd.util.Utilities;
 import net.kyori.adventure.text.minimessage.MiniMessage;
@@ -19,11 +20,14 @@ public class BuyGUI extends GUIMerchant {
                 Template.of("trader", villagerType.getDisplayName()),
                 Template.of("percentage", "100")), villagerType); //TODO get percentage from player somehow
         for (ItemStack itemStack : villagerType.getBuying()) {
-            double price = Utilities.getWorth(itemStack);
+            Price price = Utilities.getPrice(itemStack);
+            if (price == null)
+                continue;
+            double money = price.getPrice(itemStack.getAmount());
             addItem(itemStack,
-                    getPriceItem(price),
+                    getPriceItem(money),
                     null,
-                    player -> player.sendMessage(MiniMessage.get().parse("Hi! you bought: " + itemStack.getAmount() + " " + itemStack.getType().name() + " for " + price + "."))
+                    player -> player.sendMessage(MiniMessage.get().parse("Hi! you bought: " + itemStack.getAmount() + " " + itemStack.getType().name() + " for " + money + "."))
             );
         }
     }

src/main/java/com/alttd/GUI/windows/OpenGUI.java

@@ -1,6 +1,7 @@
 package com.alttd.GUI.windows;
 
 import com.alttd.GUI.GUIInventory;
+import com.alttd.VillagerUI;
 import com.alttd.config.Config;
 import com.alttd.objects.VillagerType;
 import net.kyori.adventure.text.minimessage.MiniMessage;
@@ -9,6 +10,7 @@ import org.bukkit.Material;
 import org.bukkit.event.inventory.InventoryType;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.ItemMeta;
+import org.bukkit.scheduler.BukkitRunnable;
 
 public class OpenGUI extends GUIInventory {
 
@@ -34,7 +36,29 @@ public class OpenGUI extends GUIInventory {
         super(InventoryType.HOPPER, MiniMessage.get().parse(Config.INITIAL_VILLAGER_WINDOW,
                 Template.of("trader", villagerType.getDisplayName()),
                 Template.of("percentage", "100"))); //TODO get percentage from player somehow
-        setItem(1, BUY, player -> new BuyGUI(villagerType).open(player));
+        setItem(1, BUY, player -> new BukkitRunnable() {
-        setItem(3, SELL, player -> new SellGUI(villagerType).open(player));
+            @Override
+            public void run() {
+                BuyGUI buyGUI = new BuyGUI(villagerType);
+                new BukkitRunnable() {
+                    @Override
+                    public void run() {
+                        buyGUI.open(player);
+                    }
+                }.runTask(VillagerUI.getInstance());
+            }
+        }.runTaskAsynchronously(VillagerUI.getInstance()));
+        setItem(3, SELL, player -> new BukkitRunnable() {
+            @Override
+            public void run() {
+                SellGUI sellGUI = new SellGUI(villagerType);
+                new BukkitRunnable() {
+                    @Override
+                    public void run() {
+                        sellGUI.open(player);
+                    }
+                }.runTask(VillagerUI.getInstance());
+            }
+        }.runTaskAsynchronously(VillagerUI.getInstance()));
     }
 }

src/main/java/com/alttd/GUI/windows/SellGUI.java

@@ -2,6 +2,7 @@ package com.alttd.GUI.windows;
 
 import com.alttd.GUI.GUIMerchant;
 import com.alttd.config.Config;
+import com.alttd.objects.Price;
 import com.alttd.objects.VillagerType;
 import com.alttd.util.Utilities;
 import net.kyori.adventure.text.minimessage.MiniMessage;
@@ -19,11 +20,14 @@ public class SellGUI extends GUIMerchant {
                 Template.of("trader", villagerType.getDisplayName()),
                 Template.of("percentage", "100")), villagerType); //TODO get percentage from player somehow
         for (ItemStack itemStack : villagerType.getSelling()) {
-            double price = Utilities.getWorth(itemStack);
+            Price price = Utilities.getPrice(itemStack);
+            if (price == null)
+                continue;
+            double money = price.getPrice(itemStack.getAmount());;
             addItem(itemStack,
-                    getPriceItem(price),
+                    getPriceItem(money),
                     null,
-                    player -> player.sendMessage(MiniMessage.get().parse("Hi! you sold: " + itemStack.getAmount() + " " + itemStack.getType().name() + " for " + price + "."))
+                    player -> player.sendMessage(MiniMessage.get().parse("Hi! you sold: " + itemStack.getAmount() + " " + itemStack.getType().name() + " for " + money + "."))
             );
         }
     }

src/main/java/com/alttd/events/VillagerInteract.java

@@ -1,12 +1,14 @@
 package com.alttd.events;
 
 import com.alttd.GUI.windows.OpenGUI;
+import com.alttd.VillagerUI;
 import com.alttd.objects.LoadedVillagers;
 import com.alttd.objects.VillagerType;
 import org.bukkit.entity.Villager;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.player.PlayerInteractEntityEvent;
+import org.bukkit.scheduler.BukkitRunnable;
 
 public class VillagerInteract implements Listener {
 
@@ -19,6 +21,17 @@ public class VillagerInteract implements Listener {
         if (loadedVillager == null)
             return;
 
-        new OpenGUI(loadedVillager).open(event.getPlayer());
+        new BukkitRunnable() {
+            @Override
+            public void run() {
+                OpenGUI openGUI = new OpenGUI(loadedVillager);
+                new BukkitRunnable() {
+                    @Override
+                    public void run() {
+                        openGUI.open(event.getPlayer());
+                    }
+                }.runTask(VillagerUI.getInstance());
+            }
+        }.runTaskAsynchronously(VillagerUI.getInstance());
     }
 }