Add support for kat upgrade recipes

Author: lineargraph

src/main/java/io/github/moulberry/repo/NEURepository.java

@@ -40,6 +40,7 @@ public final class NEURepository {
                             .registerSubtype(NEUCraftingRecipe.class, "crafting")
                             .registerSubtype(NEUMobDropRecipe.class, "drops")
                             .registerSubtype(NEUNpcShopRecipe.class, "npc_shop")
+                            .registerSubtype(NEUKatUpgradeRecipe.class, "katgrade")
                             .setFallbackType(NEUUnknownRecipe.class)
                             .setDefaultTypeTag("crafting")
             )

src/main/java/io/github/moulberry/repo/data/NEUIngredient.java

@@ -11,6 +11,7 @@ public class NEUIngredient {
     @NEUId String itemId;
     double amount;
     public static final String NEU_SENTINEL_EMPTY = "NEU_SENTINEL_EMPTY";
+    public static final String NEU_SENTINEL_COINS = "SKYBLOCK_COIN";
     public static final NEUIngredient SENTINEL_EMPTY = new NEUIngredient();
 
     static {
@@ -21,6 +22,13 @@ public class NEUIngredient {
     private NEUIngredient() {
     }
 
+    public static NEUIngredient ofCoins(double coins) {
+        NEUIngredient neuIngredient = new NEUIngredient();
+        neuIngredient.amount = coins;
+        neuIngredient.itemId = NEU_SENTINEL_COINS;
+        return neuIngredient;
+    }
+
     public static NEUIngredient fromItem(NEUItem item, int count) {
         NEUIngredient ingredient = new NEUIngredient();
         ingredient.amount = count;

src/main/java/io/github/moulberry/repo/data/NEUKatUpgradeRecipe.java

@@ -0,0 +1,50 @@
+package io.github.moulberry.repo.data;
+
+import lombok.Getter;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+
+public class NEUKatUpgradeRecipe implements NEURecipe {
+    /**
+     * Base pet.
+     */
+    @Getter
+    NEUIngredient input;
+    /**
+     * Upgraded pet.
+     */
+    @Getter
+    NEUIngredient output;
+    /**
+     * List of bonus items you need to upgrade, not including the pet itself.
+     */
+    @Getter
+    List<NEUIngredient> items;
+    /**
+     * Coin cost for a level "0" pet. This cost is reduced for each level, so even a level 1 pet costs less to upgrade than this.
+     */
+    @Getter
+    double coins;
+    /**
+     * Time for the pet upgrade in seconds.
+     */
+    @Getter
+    long seconds;
+
+    @Override
+    public Collection<NEUIngredient> getAllInputs() {
+        List<NEUIngredient> inputs = new ArrayList<>();
+        inputs.add(input);
+        inputs.addAll(items);
+        inputs.add(NEUIngredient.ofCoins(coins));
+        return inputs;
+    }
+
+    @Override
+    public Collection<NEUIngredient> getAllOutputs() {
+        return Collections.singleton(output);
+    }
+}