修改本地生活购物车商品数量操作

app/api/controller/LocalStoreGoods.php

@@ -4,6 +4,7 @@ namespace app\api\controller;
 
 use app\api\logic\LocalStoreGoodsCartLogic;
 use app\api\logic\LocalStoreGoodsLogic;
+use app\api\validate\CartValidate;
 use app\api\validate\LocalStoreGoodsCartValidate;
 use app\api\validate\LocalStoreGoodsValidate;
 use app\common\basics\Api;
@@ -12,7 +13,7 @@ use app\common\server\JsonServer;
 
 class LocalStoreGoods extends Api
 {
-    public $like_not_need_login = ['lists', 'addCart', 'getCartGoods', 'num'];
+    public $like_not_need_login = ['lists', 'addCart', 'getCartGoods', 'num', 'modifyCart'];
 
     // 商品列表
     public function lists()
@@ -128,4 +129,19 @@ class LocalStoreGoods extends Api
         $form = $this->request->post();
         return JsonServer::success('', LocalStoreGoodsCartLogic::cartNum($form, $this->user_id));
     }
+
+    public function modifyCart()
+    {
+        $form = $this->request->post();
+        (new LocalStoreGoodsCartValidate())->goCheck('change', ['user_id' => $this->user_id]);
+
+        try {
+            $result = LocalStoreGoodsCartLogic::modifyCart($form, $this->user_id);;
+            if ($result) {
+                return JsonServer::success('操作成功');
+            }
+        } catch (\Exception $e) {
+            return JsonServer::error($e->getMessage());
+        }
+    }
 }

app/api/logic/LocalStoreGoodsCartLogic.php

@@ -91,4 +91,49 @@ class LocalStoreGoodsCartLogic extends Logic
             ->sum('c.goods_num');
         return ['num' => $num ?? 0];
     }
+
+    public static function modifyCart($post, $user_id)
+    {
+        Db::startTrans();
+        try {
+            if ($post['cart_id']) {
+                $cart = LocalStoreGoodsCart::getSelfCart($user_id, $post['cart_id']);
+                if (!empty($cart)) {
+                    if ($cart['item_id'] == 0) {
+                        // 单规格商品
+                        $item = LocalStoreGoods::where('id', $cart['lsg_id'])->field('price')->find();
+                        if ($cart['goods_num'] + $post['goods_num'] > 999) {
+                            throw new \Exception('商品数量超出限制');
+                        }
+                    } else {
+                        // 多规格商品
+                        $item = LocalStoreGoodsItem::where('id', $cart['item_id'])->field('price, stock')->find();
+                        if ($cart['goods_num'] + $post['goods_num'] > $item['stock']) {
+                            throw new \Exception('商品数量超出限制');
+                        }
+                    }
+
+                    $price = number_format($post['num'] * $item['price'], 2, '.', '');
+                    $goods_num = $cart['goods_num'] + $post['goods_num'];
+
+                    LocalStoreGoodsCart::where('id', $post['cart_id'])->update([
+                        'goods_num' => $goods_num
+                    ]);
+
+                } else {
+                    throw new \Exception('商品信息不存在');
+                }
+            } else {
+                throw new \Exception('ID不存在');
+            }
+            Db::commit();
+            return [
+                'total_amount' => $price
+            ];
+        } catch (Exception $e) {
+            Db::rollback();
+            self::$error = $e->getMessage();
+            return false;
+        }
+    }
 }

app/api/validate/LocalStoreGoodsCartValidate.php

@@ -3,8 +3,7 @@
 namespace app\api\validate;
 
 use app\common\basics\Validate;
-use app\common\model\LocalStore\LocalStoreGoodsCart;
-
+use app\common\model\localstore\LocalStoreGoodsCart;
 
 class LocalStoreGoodsCartValidate extends Validate
 {

app/common/model/localstore/LocalStoreGoodsCart.php

@@ -29,4 +29,13 @@ class LocalStoreGoodsCart extends Models
             return LocalStoreGoodsItem::where('id', $data['item_id'])->field('image, spec_value_str, price')->find()->toArray();
         }
     }
+
+    public static function getSelfCart($user_id, $cart_id = 0)
+    {
+        if ($cart_id > 0) {
+            return self::where(['id' => $cart_id, 'user_id' => $user_id, 'is_delete' => 0])->find();
+        } else {
+            return self::where(['user_id' => $user_id, 'is_delete' => 0])->select();
+        }
+    }
 }