Fixed errors when using ShopGUIPlus v1.73 (#107)

Hook_ShopGUIPlus14/src/main/java/com/bgsoftware/wildchests/hooks/PricesProvider_ShopGUIPlus14.java

@@ -1,21 +1,27 @@
 package com.bgsoftware.wildchests.hooks;
 
+import com.bgsoftware.common.reflection.ReflectMethod;
 import com.bgsoftware.wildchests.WildChestsPlugin;
 import com.bgsoftware.wildchests.api.hooks.PricesProvider;
 import com.bgsoftware.wildchests.utils.Pair;
 import net.brcdev.shopgui.ShopGuiPlugin;
 import net.brcdev.shopgui.shop.Shop;
 import net.brcdev.shopgui.shop.ShopItem;
+import net.brcdev.shopgui.shop.ShopManager;
 import org.bukkit.OfflinePlayer;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 
+import java.util.Collection;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Set;
 
 @SuppressWarnings("unused")
 public final class PricesProvider_ShopGUIPlus14 implements PricesProvider {
 
+    private static final ReflectMethod<Set<Shop>> GET_SHOPS_METHOD = new ReflectMethod<>(ShopManager.class, Set.class, "getShops");
+
     // Added cache for shop items for better performance
     private final Map<WrappedItemStack, Pair<ShopItem, Shop>> cachedShopItems = new HashMap<>();
     private final ShopGuiPlugin plugin;
@@ -33,8 +39,7 @@ public double getPrice(OfflinePlayer offlinePlayer, ItemStack itemStack) {
 
         WrappedItemStack wrappedItemStack = new WrappedItemStack(itemStack);
         Pair<ShopItem, Shop> shopPair = cachedShopItems.computeIfAbsent(wrappedItemStack, i -> {
-            Map<String, Shop> shops = plugin.getShopManager().shops;
-            for (Shop shop : shops.values()) {
+            for (Shop shop : getShops()) {
                 for (ShopItem _shopItem : shop.getShopItems())
                     if (areSimilar(_shopItem.getItem(), itemStack, _shopItem.isCompareMeta()))
                         return new Pair<>(_shopItem, shop);
@@ -54,6 +59,11 @@ public double getPrice(OfflinePlayer offlinePlayer, ItemStack itemStack) {
         return price;
     }
 
+    private Collection<Shop> getShops() {
+        return GET_SHOPS_METHOD.isValid() ? GET_SHOPS_METHOD.invoke(plugin.getShopManager()) :
+                plugin.getShopManager().shops.values();
+    }
+
     private static boolean areSimilar(ItemStack is1, ItemStack is2, boolean compareMetadata) {
         return compareMetadata ? is1.isSimilar(is2) : is2 != null && is1 != null && is1.getType() == is2.getType() &&
                 is1.getDurability() == is2.getDurability();