Implements netherite salvaging #24

src/main/java/net/knarcraft/blacksmith/util/SalvageHelper.java

@@ -1,6 +1,5 @@
 package net.knarcraft.blacksmith.util;
 
-import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.Server;
 import org.bukkit.enchantments.Enchantment;
@@ -43,6 +42,29 @@ public final class SalvageHelper {
         trimMaterialToMaterial.put(TrimMaterial.REDSTONE, Material.REDSTONE);
     }
 
+    /**
+     * Gets salvage for a given netherite item
+     *
+     * @param item <p>The netherite armor/tool to salvage</p>
+     * @return <p></p>
+     */
+    @Nullable
+    public static List<ItemStack> getNetheriteSalvage(@NotNull ItemStack item) {
+        Material newMaterial = Material.matchMaterial(item.getType().name().replace("NETHERITE", "DIAMOND"));
+        if (newMaterial == null) {
+            return null;
+        }
+        ItemStack clone = item.clone();
+        clone.setType(newMaterial);
+
+        List<ItemStack> salvage = new ArrayList<>();
+        salvage.add(clone);
+        salvage.add(new ItemStack(Material.NETHERITE_INGOT, 1));
+        salvage.add(new ItemStack(Material.NETHERITE_UPGRADE_SMITHING_TEMPLATE, 1));
+
+        return salvage;
+    }
+
     /**
      * Gets salvage for the given armor trim
      *
@@ -51,7 +73,7 @@ public final class SalvageHelper {
      * @return <p>The salvage, or null if salvage could not be calculated</p>
      */
     @Nullable
-    public static List<ItemStack> getTrimSalvage(@NotNull ItemStack item, @NotNull ArmorMeta armorMeta) {
+    public static List<ItemStack> getArmorTrimSalvage(@NotNull ItemStack item, @NotNull ArmorMeta armorMeta) {
         ArmorTrim armorTrim = armorMeta.getTrim();
         if (armorTrim == null) {
             return null;
@@ -82,22 +104,41 @@ public final class SalvageHelper {
     }
 
     /**
-     * Gets whether the given item has a valid crafting recipe
+     * Checks whether the given item can be salvaged, assuming no restrictions apply
      *
-     * @param item <p>The item to check</p>
-     * @return <p>True if the item has a valid crafting recipe</p>
+     * @param server <p>The server to get recipes from</p>
+     * @param item   <p>The item to check</p>
+     * @return <p>True if the item can be salvaged</p>
      */
-    public static boolean hasRecipe(@NotNull ItemStack item) {
-        List<Recipe> recipes = Bukkit.getRecipesFor(new ItemStack(item.getType(), item.getAmount()));
+    public static boolean isSalvageable(@NotNull Server server, @NotNull ItemStack item) {
+        List<Recipe> recipes = server.getRecipesFor(new ItemStack(item.getType(), item.getAmount()));
         for (Recipe recipe : recipes) {
-            if (recipe instanceof ShapedRecipe || recipe instanceof ShapelessRecipe) {
+            // Only crafting recipes are allowed.
+            if ((recipe instanceof ShapedRecipe || recipe instanceof ShapelessRecipe) &&
+                    item.getAmount() >= recipe.getResult().getAmount()) {
                 return true;
             }
         }
-
         return false;
     }
 
+    /**
+     * Gets the amount of an item that's required to salvage that item
+     *
+     * @param server <p>The server to get recipes from</p>
+     * @param item   <p>The item to check</p>
+     * @return <p>The number of items required for salvage, or -1 if the recipe was not found</p>
+     */
+    public static int getRequiredAmountForSalvage(@NotNull Server server, @NotNull ItemStack item) {
+        for (Recipe recipe : server.getRecipesFor(new ItemStack(item.getType(), item.getAmount()))) {
+            // Only crafting recipes are allowed.
+            if (recipe instanceof ShapedRecipe || recipe instanceof ShapelessRecipe) {
+                return recipe.getResult().getAmount();
+            }
+        }
+        return 1;
+    }
+
     /**
      * Gets the sum of all enchantment levels for the given item
      *