infantServiceApi/app/api/controller/Cart.php

<?php
declare (strict_types=1);

namespace app\api\controller;

use app\BaseController;
use app\model\api\StoreCart;
use app\model\api\StoreProductAttrValue;
use app\Request;
use library\services\UtilService;
use think\facade\Db;

class Cart extends BaseController
{
    /**
     * 获取购物车列表
     * @param Request $request
     */
    public function list(Request $request)
    {
        $list = (new StoreCart())->getCartList($request->user['uid']);
        return app('json')->success($list);
    }

    /**
     * 添加购物车
     * @param Request $request
     * @return \think\response\Json
     */
    public function add(Request $request)
    {
        $post = UtilService::getMore([
            ['product_id', '', 'empty', '参数错误'],
            ['cart_num', 1],
            ['product_attr_unique', ''],
        ], $request);

        // 获取商品信息
        $product = Db::name('store_product')->where('id', $post['product_id'])->find();
        if (!$product) {
            return app('json')->fail('商品不存在');
        }

        // 获取SKU信息
        $skuInfo = null;
        if (!empty($post['product_attr_unique'])) {
            $skuInfo = (new StoreProductAttrValue())->getSkuBySuk($post['product_id'], $post['product_attr_unique']);
            if (!$skuInfo) {
                return app('json')->fail('商品规格不存在');
            }
        }

        $data = [
            'uid' => $request->user['uid'],
            'product_id' => $post['product_id'],
            'cart_num' => $post['cart_num'],
            'product_attr_unique' => $post['product_attr_unique'],
            'create_time' => time(),
        ];

        $cartId = (new StoreCart())->addToCart($data);

        if ($cartId) {
            return app('json')->success('添加成功', ['id' => $cartId]);
        } else {
            return app('json')->fail('添加失败');
        }
    }

    /**
     * 修改购物车数量
     * @param Request $request
     */
    public function updateNum(Request $request)
    {
        $post = UtilService::getMore([
            ['id', '', 'empty', '参数错误'],
            ['cart_num', 1],
        ], $request);

        if ($post['cart_num'] <= 0) {
            return app('json')->fail('数量必须大于0');
        }

        $result = (new StoreCart())->updateCartNum($post['id'], $post['cart_num'], $request->user['uid']);

        if ($result) {
            return app('json')->success('修改成功');
        } else {
            return app('json')->fail('修改失败');
        }
    }

    /**
     * 删除购物车
     * @param Request $request
     */
    public function delete(Request $request)
    {
        $post = UtilService::getMore([
            ['ids', '', 'empty', '参数错误'],
        ], $request);

        $ids = explode(',', $post['ids']);
        $result = (new StoreCart())->deleteCart($ids, $request->user['uid']);

        if ($result) {
            return app('json')->success('删除成功');
        } else {
            return app('json')->fail('删除失败');
        }
    }

    /**
     * 获取购物车数量
     * @param Request $request
     */
    public function count(Request $request)
    {
        $count = Db::name('store_cart')
            ->where('uid', $request->user['uid'])
            ->count();

        return app('json')->success(['count' => $count]);
    }
}