其余文件

app/api/logic/CartLogic.php

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+<?php
+// +----------------------------------------------------------------------
+// | likeshop开源商城系统
+// +----------------------------------------------------------------------
+// | 欢迎阅读学习系统程序代码，建议反馈是我们前进的动力
+// | gitee下载：https://gitee.com/likeshop_gitee
+// | github下载：https://github.com/likeshop-github
+// | 访问官网：https://www.likeshop.cn
+// | 访问社区：https://home.likeshop.cn
+// | 访问手册：http://doc.likeshop.cn
+// | 微信公众号：likeshop技术社区
+// | likeshop系列产品在gitee、github等公开渠道开源版本可免费商用，未经许可不能去除前后端官方版权标识
+// |  likeshop系列产品收费版本务必购买商业授权，购买去版权授权后，方可去除前后端官方版权标识
+// | 禁止对系统程序代码以任何目的，任何形式的再发布
+// | likeshop团队版权所有并拥有最终解释权
+// +----------------------------------------------------------------------
+// | author: likeshop.cn.team
+// +----------------------------------------------------------------------
+
+
+namespace app\api\logic;
+use app\common\{
+    enum\GoodsEnum,
+    model\Cart,
+    basics\Logic,
+    model\goods\Goods,
+    enum\FootprintEnum
+};
+
+/**
+ * 购物车逻辑层
+ * Class CartLogic
+ * @package app\api\logic
+ */
+class CartLogic extends Logic
+{
+
+
+    /**
+     * @notes 购物车列表
+     * @param $user_id
+     * @return array
+     * @throws \think\db\exception\DataNotFoundException
+     * @throws \think\db\exception\DbException
+     * @throws \think\db\exception\ModelNotFoundException
+     * @author cjhao
+     * @date 2021/9/7 10:23
+     */
+    public static function lists($user_id)
+    {
+        $carts = Cart::with(['goods', 'goods_item', 'shop'])
+            ->where('user_id', $user_id)
+            ->order('id desc')
+            ->select()->toArray();
+
+        $goods_num = 0;
+        $total = 0;
+        $lists = [];
+
+        $shop_ids = array_unique(array_column($carts, 'shop_id'));
+
+        foreach ($shop_ids as $shop_id) {
+
+            $lists[$shop_id]['is_selected'] = 1;
+            $shop_info = $cart_lists = [];
+
+            foreach ($carts as $k => $cart) {
+                if ($shop_id != $cart['shop_id']) {
+                    continue;
+                }
+                // 添加检查：确保goods和goods_item存在且不为null
+                if (empty($cart['goods']) || $cart['goods']['del'] != 0) {
+                    continue;
+                }
+                // 如果goods_item不存在，则跳过或处理默认值
+                if (empty($cart['goods_item'])) {
+                    // 可以选择跳过该记录或设置默认值
+                    continue;
+                }
+                if (empty($shop_info)) {
+                    $shop_info = [
+                        'shop_id'   => $cart['shop']['id'],
+                        'shop_name' => $cart['shop']['name'],
+                        'type'      => $cart['shop']['type'],
+                        'is_pay'    => $cart['shop']['is_pay'],
+                    ];
+                }
+
+                //已到期商家所有商品不可选中
+                $is_pay = $cart['shop']['is_pay'] ?? 0;
+                if(strtotime($cart['shop']['expire_time']) < time() || $cart['shop']['is_run'] == 0 || $cart['shop']['is_freeze'] == 1) {
+                    $cart['selected'] = 0;
+                    $is_pay = 0;
+                }
+
+                $sub_price = 0; // 已选中 && 上架 && 未删除 && 规格信息不为空 && 商家支付功能开启
+                if ($cart['selected'] == 1 && $cart['goods']['status'] == 1 && $cart['goods']['del'] == 0
+                    && !empty($cart['goods_item']) && $cart['shop']['is_pay'])
+                {
+                    $goods_num += $cart['goods_num'];
+                    $total += $cart['goods_item']['price'] * $cart['goods_num'];
+                    $sub_price = round($cart['goods_item']['price'] * $cart['goods_num'], 2);
+                } else {
+                    $cart['selected'] = 0;
+                }
+
+                // 设置商家选中状态; 满足条件(未选中的商品,上架,未删除,有规格信息,商家支付功能开启) 才影响商家选中状态
+                if(!$cart['selected']) {
+                    if ($cart['goods']['status'] == 1 && $cart['goods']['del'] == 0
+                        && !empty($cart['goods_item']) && $cart['shop']['is_pay']) {
+                        $lists[$shop_id]['is_selected'] = 0;
+                    }
+                }
+
+                $cart_lists[] = [
+                    'cart_id'           => $cart['id'],
+                    'goods_id'          => $cart['goods_id'],
+                    'goods_name'        => $cart['goods']['name'] ?? '', // 提供默认值
+                    'image'             => empty($cart['goods_item']['image']) ? ($cart['goods']['image'] ?? '') : $cart['goods_item']['image'],
+                    'goods_num'         => $cart['goods_num'],
+                    'goods_status'      => $cart['goods']['status'] ?? 0,
+                    'goods_del'         => $cart['goods']['del'] ?? 1,
+                    'spec_value_str'    => $cart['goods_item']['spec_value_str'] ?? '请重新选择规格',
+                    'price'             => $cart['goods_item']['price'] ?? 0,
+                    'stock'             => $cart['goods_item']['stock'] ?? 0,
+                    'selected'          => intval($cart['selected']),
+                    'item_id'           => $cart['item_id'],
+                    'sub_price'         => $sub_price,
+                    'is_pay'            => $is_pay,
+                    'has_item'          => empty($cart['goods_item']) ? 0 : 1, //是否有规格信息
+                ];
+            }
+            
+            if (empty($shop_info)) {
+                unset($lists[$shop_id]);
+                continue;
+            }
+
+            $lists[$shop_id]['shop'] = $shop_info;
+            $lists[$shop_id]['cart'] = $cart_lists;
+        }
+
+        return [
+            'lists' => array_values($lists),
+            'total_amount' => round($total, 2),
+            'total_num' => $goods_num,
+        ];
+    }
+
+
+
+    /**
+     * Notes: 添加
+     * @param $post
+     * @param $user_id
+     * @return bool
+     * @author 段誉(2021/5/10 19:03)
+     */
+    public static function add($post, $user_id)
+    {
+        try {
+            $item_id = $post['item_id'];
+            $goods_num = $post['goods_num'];
+
+            $cart = Cart::where(['user_id' => $user_id, 'item_id' => $item_id])->find();
+            $cart_num = $post['goods_num'] + (isset($cart) ? $cart['goods_num'] : 0);
+
+            $goods = self::checkCartGoods($item_id, $cart_num);
+            if (false === $goods) {
+                throw new \Exception(self::getError() ?: '商品信息错误');
+            }
+
+            if ($cart) {
+                //购物车内已有该商品
+                Cart::where(['id' => $cart['id'], 'shop_id' => $goods['shop_id']])
+                    ->update(['goods_num' => $goods_num + $cart['goods_num']]);
+            } else {
+                //新增购物车记录
+                Cart::create([
+                    'user_id' => $user_id,
+                    'goods_id' => $goods['id'],
+                    'goods_num' => $goods_num,
+                    'item_id' => $item_id,
+                    'shop_id'  => $goods['shop_id'],
+                ]);
+            }
+
+            // 记录访问足迹
+            event('Footprint', [
+                'type'    => FootprintEnum::ADD_CART,
+                'user_id' => $user_id,
+                'foreign_id' => $goods['id']
+            ]);
+
+            return true;
+        } catch (\Exception $e) {
+            self::$error = $e->getMessage();
+            return false;
+        }
+    }
+
+
+    /**
+     * Notes: 变动数量
+     * @param $cart_id
+     * @param $goods_num
+     * @author 段誉(2021/5/11 11:59)
+     * @return bool
+     * @throws \think\db\exception\DataNotFoundException
+     * @throws \think\db\exception\DbException
+     * @throws \think\db\exception\ModelNotFoundException
+     */
+    public static function change($cart_id, $goods_num)
+    {
+        $cart = Cart::find($cart_id);
+        $goods_num = ($goods_num <= 0) ? 1 : $goods_num;
+        if (false === self::checkCartGoods($cart['item_id'], $goods_num)) {
+            return false;
+        }
+        Cart::update(['goods_num' => $goods_num], ['id' => $cart_id]);
+        return true;
+    }
+
+
+    /**
+     * Notes: 删除
+     * @param $cart_id
+     * @param $user_id
+     * @author 段誉(2021/5/11 12:02)
+     * @return bool
+     */
+    public static function del($cart_id, $user_id)
+    {
+        return Cart::where(['id' => $cart_id, 'user_id' => $user_id])->delete();
+    }
+
+
+    /**
+     * Notes: 更改选中状态
+     * @param $post
+     * @param $user_id
+     * @author 段誉(2021/5/11 15:49)
+     * @return Cart
+     */
+    public static function selected($post, $user_id)
+    {
+        return Cart::where(['user_id' => $user_id, 'id' => $post['cart_id']])
+            ->update(['selected' => $post['selected']]);
+    }
+
+
+    /**
+     * Notes: 购物车数量
+     * @param $user_id
+     * @author 段誉(2021/5/11 12:07)
+     * @return array
+     */
+    public static function cartNum($user_id)
+    {
+        $cart = new Cart();
+        $num = $cart->alias('c')
+            ->join('goods g', 'g.id = c.goods_id')
+            ->join('goods_item i', 'i.id = c.item_id')
+            ->where(['g.status' => 1, 'g.del' => 0, 'c.user_id' => $user_id])
+            ->sum('goods_num');
+        return ['num' => $num ?? 0];
+    }
+
+
+    /**
+     * Notes: 验证商品
+     * @param $item_id
+     * @param $goods_num
+     * @author 段誉(2021/5/11 11:59)
+     * @return bool
+     */
+    public static function checkCartGoods($item_id, $goods_num)
+    {
+        $goodsModel = new Goods();
+        $goods = $goodsModel->alias('g')
+            ->with('shop')
+            ->field('g.id, g.status, g.del, g.shop_id, g.type,i.stock')
+            ->join('goods_item i', 'i.goods_id = g.id')
+            ->where('i.id', $item_id)
+            ->find();
+
+        if (!$goods['shop']['is_pay']) {
+            self::$error = '该商家支付功能已关闭';
+            return false;
+        }
+
+        if (empty($goods) || $goods['status'] == 0 || $goods['del'] != 0) {
+            self::$error = '商品不存在或已下架';
+            return false;
+        }
+
+        if ($goods['stock'] < $goods_num) {
+            self::$error = '很抱歉,库存不足';
+            return false;
+        }
+
+        if ($goods['type'] == GoodsEnum::TYPE_VIRTUAL) {
+            self::$error = '虚拟商品不可加入购物车';
+            return false;
+        }
+
+        return $goods;
+    }
+
+
+}