WS-10-Database/src/main/java/dev/dao/OrderDao.java

package dev.dao;

import dev.database.DatabaseConnection;
import dev.model.Order;

import java.sql.*;
import java.util.ArrayList;
import java.util.List;


public class OrderDao {


    public int save(Order order) {


        String sql =
                "INSERT INTO orders(user_id,total_price) VALUES(?,?)";


        try(Connection con = DatabaseConnection.getConnection();

            PreparedStatement ps =
                    con.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS)){


            ps.setInt(1, order.getUserId());

            ps.setDouble(2, order.getTotalPrice());


            ps.executeUpdate();



            ResultSet rs = ps.getGeneratedKeys();


            if(rs.next()){

                return rs.getInt(1);

            }


        }catch(SQLException e){

            e.printStackTrace();

        }


        return -1;

    }




    public List<Order> findByUserId(int userId){


        List<Order> orders = new ArrayList<>();


        String sql =
                "SELECT * FROM orders WHERE user_id=?";


        try(Connection con = DatabaseConnection.getConnection();

            PreparedStatement ps =
                    con.prepareStatement(sql)){


            ps.setInt(1,userId);



            ResultSet rs = ps.executeQuery();



            while(rs.next()){


                Order order = new Order();


                order.setId(rs.getInt("id"));

                order.setUserId(rs.getInt("user_id"));

                order.setTotalPrice(
                        rs.getDouble("total_price")
                );


                Timestamp timestamp =
                        rs.getTimestamp("created_at");


                if(timestamp != null){

                    order.setCreatedAt(
                            timestamp.toLocalDateTime()
                    );

                }


                orders.add(order);

            }



        }catch(SQLException e){

            e.printStackTrace();

        }


        return orders;

    }


}