Complete OrderDetail and OrderDetailDao

src/main/java/dev/dao/OrderDetailDao.java

@@ -1,24 +1,74 @@
 package dev.dao;
 
+import dev.database.DatabaseConnection;
 import dev.model.OrderDetail;
 
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
 import java.util.List;
 
 public class OrderDetailDao {
 
     public void save(OrderDetail detail) {
 
-        // TODO:
-        // Insert order detail
+        String sql = "INSERT INTO order_details (order_id, menu_item_id, quantity, price) VALUES (?, ?, ?, ?)";
 
+        try (
+                Connection connection = DatabaseConnection.getConnection();
+                PreparedStatement statement = connection.prepareStatement(sql)
+        ) {
+
+            statement.setInt(1, detail.getOrderId());
+            statement.setInt(2, detail.getMenuItemId());
+            statement.setInt(3, detail.getQuantity());
+            statement.setDouble(4, detail.getPrice());
+
+            statement.executeUpdate();
+
+        } catch (SQLException e) {
+
+            System.out.println("Error saving order detail: " + e.getMessage());
+
+        }
     }
 
     public List<OrderDetail> findByOrderId(int orderId) {
 
-        // TODO:
-        // Retrieve order details
+        String sql = "SELECT id, order_id, menu_item_id, quantity, price FROM order_details WHERE order_id = ?";
 
-        return null;
+        List<OrderDetail> details = new ArrayList<>();
+
+        try (
+                Connection connection = DatabaseConnection.getConnection();
+                PreparedStatement statement = connection.prepareStatement(sql)
+        ) {
+
+            statement.setInt(1, orderId);
+
+            ResultSet resultSet = statement.executeQuery();
+
+            while (resultSet.next()) {
+
+                OrderDetail detail = new OrderDetail();
+
+                detail.setId(resultSet.getInt("id"));
+                detail.setOrderId(resultSet.getInt("order_id"));
+                detail.setMenuItemId(resultSet.getInt("menu_item_id"));
+                detail.setQuantity(resultSet.getInt("quantity"));
+                detail.setPrice(resultSet.getDouble("price"));
+
+                details.add(detail);
+            }
+
+        } catch (SQLException e) {
+
+            System.out.println("Error loading order details: " + e.getMessage());
+
+        }
+
+        return details;
     }
-
 }