Add more listeners and events to listen to

src/main/java/com/alttd/playershops/handler/ShopHandler.java

@@ -12,7 +12,10 @@ import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.Tag;
 import org.bukkit.block.Block;
+import org.bukkit.block.BlockFace;
+import org.bukkit.block.DoubleChest;
 import org.bukkit.entity.Player;
+import org.bukkit.inventory.InventoryHolder;
 
 import java.sql.ResultSet;
 import java.sql.SQLException;
@@ -95,10 +98,12 @@ public class ShopHandler {
     }
 
     public boolean isShopMaterial(Block block) {
-        if (Tag.SHULKER_BOXES.isTagged(block.getType())) {
-            return true;
-        }
-        return shopMaterials.contains(block.getType());
+//        if (Tag.SHULKER_BOXES.isTagged(block.getType())) {
+//            return true;
+//        }
+//        return shopMaterials.contains(block.getType());
+        // TODO make a cache of this somehow?
+        return block.getState() instanceof InventoryHolder inventoryHolder && !(inventoryHolder.getInventory().getHolder() instanceof DoubleChest);
     }
 
     public List<PlayerShop> getShops(UUID uuid) {
@@ -116,6 +121,19 @@ public class ShopHandler {
         return shopSignLocation.get(newLocation);
     }
 
+    public PlayerShop getShopsNear(Block block) {
+        BlockFace[] faces = {BlockFace.NORTH, BlockFace.SOUTH, BlockFace.EAST, BlockFace.WEST};
+        for (BlockFace face : faces) {
+            if (this.isShopMaterial(block.getRelative(face))) {
+                Block shopChest = block.getRelative(face);
+                PlayerShop shop = getShop(shopChest.getLocation());
+                if (shop != null)
+                    return shop;
+            }
+        }
+        return null;
+    }
+
     public void addShop(PlayerShop shop) {
         shopLocation.put(shop.getShopLocation(), shop);
         shopSignLocation.put(shop.getSignLocation(), shop);