Add VillagerInventory.java

Added the possibility to find a special rabbits foot on a villager when trading with a BUTCHER profession.

src/main/java/io/github/simplex/luck/FeelingLucky.java

@@ -70,6 +70,7 @@ public final class FeelingLucky extends JavaPlugin {
         new RestoreHunger(this);
         new TakeDamage(this);
         new UnbreakableTool(this);
+        new VillagerInventory(this);
     }
 
     public PlayerHandler getHandler() {

src/main/java/io/github/simplex/luck/listener/VillagerInventory.java

@@ -0,0 +1,56 @@
+package io.github.simplex.luck.listener;
+
+import io.github.simplex.lib.ItemBuilder;
+import io.github.simplex.luck.FeelingLucky;
+import io.github.simplex.luck.player.Luck;
+import io.github.simplex.luck.util.SpecialFootItem;
+import org.bukkit.Material;
+import org.bukkit.entity.Villager;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerInteractAtEntityEvent;
+import org.bukkit.inventory.MerchantRecipe;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class VillagerInventory implements Listener {
+    private final SpecialFootItem foot = new SpecialFootItem();
+    private final MerchantRecipe recipe = new MerchantRecipe(foot.get(), 0, 2, true);
+
+    private final FeelingLucky plugin;
+
+    public VillagerInventory(FeelingLucky plugin) {
+        this.plugin = plugin;
+
+        recipe.setIngredients(Arrays.asList(
+                ItemBuilder.of(Material.EMERALD).build(),
+                ItemBuilder.of(Material.RABBIT_HIDE).build()
+        ));
+        recipe.setDemand(8);
+        recipe.setPriceMultiplier(1.25F);
+        recipe.setVillagerExperience(25);
+        recipe.setSpecialPrice(4);
+
+        plugin.getServer().getPluginManager().registerEvents(this, plugin);
+    }
+
+    @EventHandler
+    public void addRabbitFootToVillagerInventory(PlayerInteractAtEntityEvent event) {
+        if (event.getRightClicked() instanceof Villager vil) {
+            if (!vil.getProfession().equals(Villager.Profession.BUTCHER)) return;
+
+            List<MerchantRecipe> recipeList = new ArrayList<>(vil.getRecipes());
+            if (recipeList.contains(recipe)) return;
+
+            Luck luck = plugin.getHandler().getLuckContainer(event.getPlayer());
+            if (luck == null) return;
+
+            if (luck.quickRNG(luck.getPercentage())) {
+                recipeList.add(recipe);
+                vil.setRecipes(recipeList);
+            }
+        }
+    }
+}