package controller

import (
	"GolangLearnPractice1/bookstore2/dao"
	"GolangLearnPractice1/bookstore2/model"
	"encoding/json"
	"net/http"
	"strconv"
)

//DeleteCartItem 删除购物项
func DeleteCartItem(w http.ResponseWriter, r *http.Request) {
	cartItemID := r.FormValue("cartItemId")
	dao.DeleteCartItemByID(cartItemID)
	GetCartInfo(w, r)
}

//UpdateCartItem 更新购物项的信息（改变图书的数量）
func UpdateCartItem(w http.ResponseWriter, r *http.Request) {
	_, session := dao.IsLogin(r)

	cartItemID := r.FormValue("cartItemId")
	bookCount := r.FormValue("bookCount")
	ibookCount, _ := strconv.ParseInt(bookCount, 10, 64)
	cartItem := dao.GetCartItemByID(cartItemID)
	cartItem.Count = ibookCount
	cartItem.Amount = float64(ibookCount) * cartItem.Book.Price
	dao.UpdateCartItem(cartItem)
	//构造新的结构体，传给ajax数据
	cart, _ := dao.GetCartByUserID(session.UserID)
	updateCartTypeByAjax := &model.UpdateCartTypeByAjax{
		TotalCount:  cart.TotalCount,
		TotalAmount: cart.TotalAmount,
		Amount:      cartItem.Amount,
	}
	data, _ := json.Marshal(updateCartTypeByAjax)
	w.Write(data)
}