Started work on confirm button

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

@@ -3,6 +3,7 @@ package com.alttd.GUI;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.Merchant;
+import org.bukkit.inventory.MerchantInventory;
 
 import java.util.HashMap;
 import java.util.UUID;
@@ -19,4 +20,6 @@ public interface GUI {
     Inventory getInventory();
 
     Merchant getMerchant();
+
+    void setMerchantInventory(MerchantInventory merchantInventory);
 }

src/main/java/com/alttd/GUI/GUIAction.java

@@ -4,4 +4,4 @@ import org.bukkit.entity.Player;
 
 public interface GUIAction {
     void click(Player player);
-}
+}

src/main/java/com/alttd/GUI/GUIInventory.java

@@ -7,6 +7,8 @@ import org.bukkit.event.inventory.InventoryType;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.Merchant;
+import org.bukkit.inventory.MerchantInventory;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.HashMap;
 
@@ -31,7 +33,7 @@ public abstract class GUIInventory implements GUI {
     }
 
     public void setItem(int slot, ItemStack stack, GUIAction action){
-        inventory.setItem(slot, stack);
+        this.inventory.setItem(slot, stack);
         if (action != null){
             guiActions.put(slot, action);
         }
@@ -53,4 +55,9 @@ public abstract class GUIInventory implements GUI {
     public GUIAction getGuiAction(int slot) {
         return guiActions.get(slot);
     }
+
+    @Override
+    public void setMerchantInventory(MerchantInventory merchantInventory) {
+
+    }
 }

src/main/java/com/alttd/GUI/GUIListener.java

@@ -7,6 +7,7 @@ import org.bukkit.event.inventory.InventoryClickEvent;
 import org.bukkit.event.inventory.InventoryCloseEvent;
 import org.bukkit.event.inventory.TradeSelectEvent;
 import org.bukkit.event.player.PlayerQuitEvent;
+import org.bukkit.inventory.MerchantInventory;
 
 public class GUIListener implements Listener {
 
@@ -48,6 +49,8 @@ public class GUIListener implements Listener {
         event.setCancelled(true);
         GUIAction action = guiMerchant.getTradeAction(event.getIndex());
 
+        gui.setMerchantInventory(event.getInventory());
+
         if (action != null){
             action.click(player);
         }

src/main/java/com/alttd/GUI/GUIMerchant.java

@@ -3,18 +3,17 @@ package com.alttd.GUI;
 import com.alttd.objects.VillagerType;
 import net.kyori.adventure.text.Component;
 import org.bukkit.Bukkit;
-import org.bukkit.entity.HumanEntity;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.*;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.HashMap;
 
 public abstract class GUIMerchant implements GUI{
 
+    private MerchantInventory merchantInventory;
     protected final Merchant merchant;
     protected final HashMap<Integer, GUIAction> tradeActions;
     protected final HashMap<Integer, GUIAction> guiActions;
@@ -50,8 +49,7 @@ public abstract class GUIMerchant implements GUI{
     }
 
     public void setItem(int slot, @NotNull ItemStack itemStack, @Nullable GUIAction action) {
-        Inventory inventory = (Inventory) merchant;
+        merchantInventory.setItem(slot, itemStack);
-        inventory.setItem(slot, itemStack);
         if (action != null)
             guiActions.put(slot, action);
     }
@@ -72,4 +70,9 @@ public abstract class GUIMerchant implements GUI{
     public VillagerType getVillagerType() {
         return villagerType;
     }
+
+    @Override
+    public void setMerchantInventory(MerchantInventory merchantInventory) {
+        this.merchantInventory = merchantInventory;
+    }
 }

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

@@ -27,6 +27,15 @@ import java.util.Objects;
 public class BuyGUI extends GUIMerchant {
 
     private static final MiniMessage miniMessage = MiniMessage.miniMessage();
+    private static final ItemStack confirm;
+
+    static {
+        ItemStack itemStack = new ItemStack(Material.EMERALD_BLOCK);
+        ItemMeta itemMeta = itemStack.getItemMeta();
+        itemMeta.displayName(MiniMessage.miniMessage().deserialize("<green>Confirm</green>"));
+        itemStack.setItemMeta(itemMeta);
+        confirm = itemStack;
+    }
 
     public BuyGUI(VillagerType villagerType, EconUser econUser, boolean bulk) {
         super(miniMessage.deserialize(Config.BUY_WINDOW, TemplateResolver.resolving(
@@ -66,12 +75,15 @@ public class BuyGUI extends GUIMerchant {
             ));
             return;
         }
-        buy2(player, amount, cost, material, econUser, villagerType, transPts, oldPoints, price);
+        ItemStack itemStack = new ItemStack(Material.CANDLE);
-//        setItem(0, new ItemStack(material), null);
+        ItemMeta itemMeta = itemStack.getItemMeta();
-//        setItem(1, new ItemStack(Material.CANDLE), null);
+        itemMeta.displayName(miniMessage.deserialize(String.valueOf(cost)));
-//        setItem(2, new ItemStack(Material.EMERALD_BLOCK), player1 ->
+        itemStack.setItemMeta(itemMeta);
-//                buy2(player1, amount, cost, material, econUser, villagerType, transPts, oldPoints, price));
+        setItem(0, new ItemStack(material), null);
-//        player.updateInventory();
+        setItem(1, new ItemStack(Material.CANDLE), null);
+        setItem(2, confirm, player1 ->
+                buy2(player1, amount, cost, material, econUser, villagerType, transPts, oldPoints, price));
+        player.updateInventory();
     }
 
     private void buy2(Player player, int amount, double cost, Material material, EconUser econUser, VillagerType villagerType, int transPts, int oldPoints, Price price) {
@@ -113,7 +125,7 @@ public class BuyGUI extends GUIMerchant {
         Bukkit.getServer().getPluginManager()
                 .callEvent(new SpawnShopEvent(player, amount, cost, material,
                         oldPoints, newPoints, true));
-//        buy(villagerType, player, material, amount, price);
+        buy(villagerType, player, material, amount, price);
     }
 
     private ItemStack getPriceItem(double price) {

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

@@ -19,6 +19,7 @@ import org.bukkit.Material;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.MerchantInventory;
 import org.bukkit.inventory.PlayerInventory;
 import org.bukkit.inventory.meta.ItemMeta;
 

src/main/java/com/alttd/objects/EconUser.java

@@ -91,7 +91,7 @@ public class EconUser {
             int remove = points;
             if (remove < 0)
                 remove *= -1;
-            int i = (int) (0.9 * remove) - 10;
+            int i = (int) (0.93 * remove) - 30;
             setPoints(villagerType, i < 10 && i > -10 ? 0 : i);
         });
     }

src/main/java/com/alttd/util/Utilities.java

@@ -26,7 +26,7 @@ public class Utilities {
 //        if (tmp > 4)
 //            total += 0.01;
 
-        return (double) (Math.round(num * scale)) / scale;
+        return ((int) (num * scale)) / scale;
     }
 
     /**