SPIGOT-6890: Add repair cost amount in AnvilInventory

By: Doc <nachito94@msn.com>

paper-server/nms-patches/net/minecraft/world/inventory/ContainerAnvil.patch

@@ -1,6 +1,6 @@
 --- a/net/minecraft/world/inventory/ContainerAnvil.java
 +++ b/net/minecraft/world/inventory/ContainerAnvil.java
-@@ -18,6 +18,10 @@
+@@ -18,12 +18,16 @@
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
@@ -11,6 +11,13 @@
  public class ContainerAnvil extends ContainerAnvilAbstract {
  
      private static final Logger LOGGER = LogManager.getLogger();
+     private static final boolean DEBUG_COST = false;
+     public static final int MAX_NAME_LENGTH = 50;
+-    private int repairItemCountCost;
++    public int repairItemCountCost; // PAIL private -> public
+     public String itemName;
+     public final ContainerProperty cost;
+     private static final int COST_FAIL = 0;
 @@ -33,6 +37,10 @@
      private static final int COST_REPAIR_SACRIFICE = 2;
      private static final int COST_INCOMPATIBLE_PENALTY = 1;

paper-server/src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryAnvil.java

@@ -27,6 +27,16 @@ public class CraftInventoryAnvil extends CraftResultInventory implements AnvilIn
         return container.itemName;
     }
 
+    @Override
+    public int getRepairCostAmount() {
+        return container.repairItemCountCost;
+    }
+
+    @Override
+    public void setRepairCostAmount(int amount) {
+        container.repairItemCountCost = amount;
+    }
+
     @Override
     public int getRepairCost() {
         return container.cost.get();