增加下单时的价格计算

biz-ghs/product/classes/ProductClass.php

@@ -388,4 +388,38 @@ class ProductClass extends BaseClass
         return ProductClass::updateByCondition(['id'=>$id,'shopId'=>$shopId],['price'=>$price]);
     }
 
+    //下单时计算商品的价格  linqh 2021.1.28
+    //itemInfo : [{"productId":3,"bigNum":1,"smallNum":2},{"productId":4,"bigNum":1,"smallNum":5}]
+    //返回 [{"productId":3,"price":2.1}]
+    public static function computedPriceByItemInfo(array $itemInfo)
+    {
+        $data = [];
+        if(empty($itemInfo)){
+            return $data;
+        }
+        $productIds = array_column($itemInfo, 'productId');
+        $productData = ProductClass::getProductByIds($productIds);
+        $productData = array_column($productData, NULL, 'id');
+
+        $itemIds =  array_column($productData,'itemId');
+        $itemData = xhItemService::getByIds($itemIds);
+        $itemData = array_column($itemData, NULL, 'id');
+        foreach ($itemInfo as $v){
+            $productId = $v['productId'];
+            $itemId = $productData[$productId]['itemId']??0;
+            $unitNum =  $itemData[$itemId]['unitNum']??0;
+            //大小数量合并多少扎
+            $itemNum = self::mergeItemNum($v['bigNum'],$v['smallNum'],$unitNum);
+            //售卖价格
+            $itemPrice = $productData[$productId]['price']??0;
+            //合计价格
+            $price = bcmul($itemNum,$itemPrice,2);
+            $tmp = [];
+            $tmp['productId'] = $productId;
+            $tmp['price'] = $price;
+            $data[] = $tmp;
+        }
+        return $data;
+    }
+
 }