添加本地生活购物车功能

app/api/controller/LocalStoreGoods.php

@@ -3,8 +3,10 @@
 namespace app\api\controller;
 
 use app\api\logic\LocalStoreGoodsLogic;
+use app\api\validate\LocalStoreGoodsCartValidate;
 use app\api\validate\LocalStoreGoodsValidate;
 use app\common\basics\Api;
+use app\common\model\localstore\LocalStoreGoodsCart;
 use app\common\server\JsonServer;
 
 class LocalStoreGoods extends Api
@@ -95,4 +97,27 @@ class LocalStoreGoods extends Api
         }
         return JsonServer::error('操作失败');
     }
+
+    // 将商品加入购物车
+    public function addCart()
+    {
+        $form = $this->request->post();
+        (new LocalStoreGoodsCartValidate())->goCheck('add', ['user_id' => $this->user_id]);
+
+        try {
+            $result = LocalStoreGoodsLogic::addCart($form, $this->user_id);
+            if ($result) {
+                return JsonServer::success('操作成功');
+            }
+        } catch (\Exception $e) {
+            return JsonServer::error($e->getMessage());
+        }
+    }
+
+    // 获取购物车数量
+    public function num()
+    {
+        $form = $this->request->post();
+        return JsonServer::success('', LocalStoreGoodsLogic::cartNum($form, $this->user_id));
+    }
 }

app/api/logic/LocalStoreGoodsLogic.php

@@ -3,13 +3,15 @@
 namespace app\api\logic;
 
 use app\common\basics\Logic;
+use app\common\enum\LocalStoreGoodsEnum;
 use app\common\model\localstore\LocalStoreGoods;
-use app\common\model\localstore\LocalStoreGoodsPic;
+use app\common\model\localstore\LocalStoreGoodsCart;
 use app\common\model\localstore\LocalStoreGoodsItem;
+use app\common\model\localstore\LocalStoreGoodsPic;
 use app\common\model\localstore\LocalStoreGoodsSpec;
 use app\common\model\localstore\LocalStoreGoodsSpecValue;
-use app\common\enum\LocalStoreGoodsEnum;
 use app\common\server\ConfigServer;
+use think\Exception;
 use think\facade\Config;
 use think\facade\Db;
 
@@ -84,9 +86,9 @@ class LocalStoreGoodsLogic extends Logic
             'fail_goods_count' => $fail_goods_count,
             'count' => $count,
             'lists' => $list,
-            'more' =>  is_more($count, $get['page_no'], $get['page_size']),
-            'page_no' =>  $get['page_no'],
-            'page_size' =>  $get['page_size']
+            'more' => is_more($count, $get['page_no'], $get['page_size']),
+            'page_no' => $get['page_no'],
+            'page_size' => $get['page_size']
         ];
 
         return $result;
@@ -315,11 +317,11 @@ class LocalStoreGoodsLogic extends Logic
 
     public static function delGoods($form)
     {
-       $result = LocalStoreGoods::where([
+        $result = LocalStoreGoods::where([
             'id' => $form['id']
-       ])->update(['delete_time' => time()]);
+        ])->update(['delete_time' => time()]);
 
-       return $result;
+        return $result;
     }
 
     // 添加规格
@@ -378,4 +380,47 @@ class LocalStoreGoodsLogic extends Logic
             LocalStoreGoodsItem::insertAll($data);
         }
     }
+
+    public static function addCart($post, $user_id)
+    {
+        Db::startTrans();
+        try {
+            // 验证商品
+            $goods = LocalStoreGoods::where(['id' => $post['lsg_id'], 'state' => 1, 'audit_status' => 1, 'delete_time' => 0])->find();
+            if (empty($goods)) {
+                throw new \Exception('商品信息错误');
+            }
+
+            $cart = LocalStoreGoodsCart::where(['user_id' => $user_id, 'lstore_id' => $post['lstore_id'], 'lsg_id' => $post['lsg_id'], 'item_id' => $post['item_id'], 'is_delete' => 0])->find();
+            if ($cart) {
+                // 如果存在于购物车，就增加数量
+                LocalStoreGoodsCart::where(['user_id' => $user_id, 'lstore_id' => $post['lstore_id'], 'lsg_id' => $post['lsg_id'], 'item_id' => $post['item_id'], 'is_delete' => 0])
+                    ->update([
+                        'goods_num' => $post['goods_num'] + $cart['goods_num'],
+                    ]);
+            } else {
+                // 购物车创建商品
+                LocalStoreGoodsCart::create([
+                    'user_id' => $user_id,
+                    'lstore_id' => $post['lstore_id'],
+                    'lsg_id' => $post['lsg_id'],
+                    'item_id' => $post['item_id'],
+                    'goods_num' => $post['goods_num'],
+                    'create_time' => time()
+                ]);
+            }
+            Db::commit();
+            return true;
+        } catch (Exception $e) {
+            Db::rollback();
+            self::$error = $e->getMessage();
+            return false;
+        }
+    }
+
+    public static function cartNum($post, $user_id)
+    {
+        $num = LocalStoreGoodsCart::where(['user_id' => $user_id, 'lstore_id' => $post['lstore_id'], 'is_delete' => 0])->sum('goods_num');
+        return ['num' => $num ?? 0];
+    }
 }

app/api/validate/LocalStoreGoodsCartValidate.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace app\api\validate;
+
+use app\common\basics\Validate;
+use app\common\model\LocalStore\LocalStoreGoodsCart;
+
+
+class LocalStoreGoodsCartValidate extends Validate
+{
+    protected $rule = [
+        'cart_id' => 'require|checkCart',
+        'goods_num' => 'require|integer|gt:0',
+        'item_id' => 'require',
+    ];
+
+    protected $message = [
+        'item_id' => '请选择商品',
+        'goods_num.require' => '商品数量不能为0',
+        'goods_num.gt' => '商品数量需大于0',
+        'goods_num.integer' => '商品数量需为整数',
+        'cart_id.require' => '参数错误',
+    ];
+
+    protected $scene = [
+        'add'       => ['item_id', 'goods_num'],
+        'del'       => ['cart_id'],
+        'change'    => ['cart_id', 'goods_num'],
+    ];
+
+
+    protected function checkCart($value, $rule, $data)
+    {
+        $cart = LocalStoreGoodsCart::where(['id' => $value, 'user_id' => $data['user_id']])->find();
+        if (!$cart) {
+            return '购物车不存在';
+        }
+        return true;
+    }
+}

app/common/model/localstore/LocalStoreGoodsCart.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace app\common\model\localstore;
+
+use app\common\basics\Models;
+
+class LocalStoreGoodsCart extends Models
+{
+
+}