Adds negation for material names and presets #13

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

@@ -1,8 +1,13 @@
 package net.knarcraft.blacksmith.util;
 
+import org.bukkit.Material;
+import org.bukkit.enchantments.EnchantmentTarget;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.Damageable;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public final class ItemHelper {
 
     private ItemHelper() {
@@ -40,4 +45,20 @@ public final class ItemHelper {
         }
     }
 
+    /**
+     * Gets a complete list of all reforge-able materials
+     *
+     * @return <p>A complete list of reforge-able materials</p>
+     */
+    public static List<Material> getAllReforgeAbleMaterials() {
+        List<Material> reforgeAbleMaterials = new ArrayList<>();
+        for (Material material : Material.values()) {
+            ItemStack item = new ItemStack(material);
+            if (item.getItemMeta() instanceof Damageable && EnchantmentTarget.BREAKABLE.includes(item)) {
+                reforgeAbleMaterials.add(material);
+            }
+        }
+        return reforgeAbleMaterials;
+    }
+
 }