complete

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

@@ -1,24 +1,64 @@
 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.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, item_price) VALUES (?, ?, ?, ?)";
 
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+
+            ps.setLong(1, detail.getOrderId());
+            ps.setLong(2, detail.getMenuItemId());
+            ps.setInt(3, detail.getQuantity());
+            ps.setDouble(4, detail.getPrice());
+
+            ps.executeUpdate();
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
     }
 
     public List<OrderDetail> findByOrderId(int orderId) {
 
-        // TODO:
-        // Retrieve order details
+        List<OrderDetail> list = new ArrayList<>();
 
-        return null;
+        String sql = "SELECT * FROM order_details WHERE order_id = ?";
+
+        try (Connection conn = DatabaseConnection.getConnection();
+             PreparedStatement ps = conn.prepareStatement(sql)) {
+
+            ps.setInt(1, orderId);
+
+            ResultSet rs = ps.executeQuery();
+
+            while (rs.next()) {
+
+                OrderDetail detail = new OrderDetail();
+                detail.setId(rs.getInt("id"));
+                detail.setOrderId(rs.getInt("order_id"));
+                detail.setMenuItemId(rs.getInt("menu_item_id"));
+                detail.setQuantity(rs.getInt("quantity"));
+                detail.setPrice(rs.getDouble("item_price"));
+
+                list.add(detail);
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+
+        return list;
     }
-
 }