fastadmin_tailored/application/api/controller/Cart.php

<?php

namespace app\api\controller;

use app\common\model\Carts;
use app\common\model\Sku;
use app\common\model\Goods;

/**
 * 购物车接口
 */
class Cart extends Base
{
    protected $noNeedLogin = [];


    //添加购物车
    public function add()
    {
        $goods_id = $this->request->post('goods_id'); //单规格使用
        $goods_sku_id = $this->request->post('goods_sku_id'); //多规格使用
        $nums = $this->request->post('nums/d', 1);
        // 增加验证器
        $validate = new \app\api\validate\Cart();
        $validate->scene('add')->check([
            'goods_id' => $goods_id,
            'goods_sku_id' => $goods_sku_id,
            'nums' => $nums,
        ]);
        if ($validate->getError()) {
            $this->error($validate->getError());
        }
        $goods = Goods::where('id', $goods_id)->where('status', 'normal')->find();
        
        if (empty($goods)) {
            $this->error('商品不存在');
        }
        if ($goods['spectype'] && !$goods_sku_id) {
            $this->error("请选择规格");
        }
        if (empty($goods_id) && empty($goods_sku_id)) {
            $this->error('参数错误');
        }
        if ($nums <= 0) {
            $this->error('数量必须大于0');
        }
        if (!empty($goods_sku_id)) {
            $row = Sku::with([
                'goods' => function ($query) {
                    $query->where('status', 'normal');
                }
            ])->where('id', $goods_sku_id)->find();

            if (empty($row) || empty($row->goods)) {
                $this->error('商品已下架');
            }
            if ($row->stocks < $nums) {
                $this->error('库存数量不足' . $nums . '件');
            }
        } else {
            if ($goods->stocks < $nums) {
                $this->error('库存数量不足' . $nums . '件');
            }
        }
        //去添加购物车
        $cart_id = Carts::push($goods_id, $goods_sku_id, $nums, $this->auth->id);
        $this->success('添加成功', $cart_id);
    }


    //删除购物车
    public function del()
    {
        $id = $this->request->post('id');
        if (!$id) {
            $this->error('参数错误');
        }
        $status = Carts::where('user_id', $this->auth->id)->where('id', 'IN', $id)->delete();
        if ($status) {
            $this->success('删除成功');
        }
        $this->error('删除失败');
    }


    //购物车商品数量+-
    public function set_nums()
    {
        $id = $this->request->post('id');
        if (!$id) {
            $this->error('参数错误');
        }
        $nums = $this->request->post('nums/d');
        // 使用验证器验证数量
        $validate = new \addons\shop\validate\Cart();
        $validate->scene('set_nums')->check([
            'nums' => $nums,
        ]);

        $row = Carts::with(['Goods', 'Sku'])->where('id', $id)->where('user_id', $this->auth->id)->find();
        if (!$row) {
            $this->error('未找到记录');
        }
        if ($row->goods_sku_id) {
            if (!$row->sku) {
                $this->error('商品不存在');
            }
            if ($row->sku->stocks < $nums) {
                $this->error('库存不足');
            }
        } else {
            if (!$row->goods) {
                $this->error('商品不存在');
            }
            if ($row->goods->stocks < $nums) {
                $this->error('库存不足');
            }
        }
        $row->nums = $nums;
        $row->save();
        $this->success('操作成功');
    }

    //购物车列表
    public function index()
    {
        $ids = $this->request->param('ids');
        $list = Carts::getGoodsList($ids, $this->auth->id);
        //没有商品过滤数据
        foreach ($list as $key => $item) {
            if (empty($item->goods)) {
                $item->delete();
                unset($list[$key]);
                continue;
            }
            $item['subtotal'] = bcmul($item['nums'], ($item->sku->price ?? $item->goods->price), 2);
            $item->goods->visible(explode(',', 'id,title,price,image,marketprice'));
        }
        $this->success('', $list);
    }

    //获取购物车的数量
    public function cart_nums()
    {
        $total = Carts::where('user_id', $this->auth->id)->count();
        $this->success('', $total);
    }
}