caimei-applets-weisha-api/src/main/java/com/caimei/service/impl/ShoppingCartServiceImpl.java

package com.caimei.service.impl;

import com.caimei.mapper.ShoppingCartMapper;
import com.caimei.model.ResponseJson;
import com.caimei.model.dto.CartDto;
import com.caimei.model.po.CmMallCartPo;
import com.caimei.model.vo.ShopVo;
import com.caimei.service.ShoppingCartService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Description
 *
 * @author : plf
 * @date : 2021/3/23
 */
@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Resource
    private ShoppingCartMapper shoppingCartMapper;

    @Override
    public ResponseJson<Integer> addShoppingCart(CartDto cart) {
        CmMallCartPo cartPo = shoppingCartMapper.findCartProduct(cart.getUserId(), cart.getProductId());
        if (cartPo == null) {
            shoppingCartMapper.insertCart(cart);
        } else {
            int productCount = cartPo.getProductCount() + cart.getProductCount();
            shoppingCartMapper.updateByProductCount(cartPo.getId(), productCount);
        }
        Integer cartQuantity = shoppingCartMapper.getCartQuantity(cart.getUserId());
        return ResponseJson.success(cartQuantity);
    }

    @Override
    public ResponseJson<Integer> getCartQuantity(Integer userId) {
        Integer cartQuantity = shoppingCartMapper.getCartQuantity(userId);
        return ResponseJson.success(cartQuantity);
    }

    @Override
    public ResponseJson<Map<String, Object>> shoppingInfo(Integer userId) {
        Map<String, Object> map = new HashMap<>(3);
        List<ShopVo> shopList = shoppingCartMapper.findCartShop(userId);
        shopList.forEach(shop -> {

        });
        return null;
    }
}