package example.dao;

import example.model.Computer;
import example.utils.DBUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.util.List;

public class CartDao {
    private final QueryRunner queryRunner = new QueryRunner(DBUtils.getDataSource());

//    加入购物车
    public int addCart(Integer user_id, Integer product_id) throws Exception {
        String sql = "insert into cart(user_id, product_id) values(?,?)";
        return queryRunner.update(sql, user_id, product_id);
    }
//   移除购物车
    public int deleteCart(Integer user_id, Integer product_id) throws Exception {
        String sql = "delete from cart where user_id=? and product_id=?";
        return queryRunner.update(sql, product_id, user_id);
    }
//    某用户的购物车
    public List<Computer> getCart(Integer user_id) throws Exception {
        String sql = "select\n" +
                "\tc2.*\n" +
                "from\n" +
                "\tcart c\n" +
                "left join computer c2 \n" +
                "on\n" +
                "\tc.product_id = c2.id\n" +
                "where\n" +
                "\tc.user_id = ?";
        return queryRunner.query(sql,new BeanListHandler<>(Computer.class),user_id);
    }

}