feat:称增加促销价逻辑

lib/common/widgets/order/steelyard_container.dart

@@ -43,7 +43,7 @@ class SteelyardController extends GetxController {
   // 波动范围
   static const double _weightTolerance = 0.05;
   // 稳定次数
-  static const int _requiredStableCount = 5;
+  static const int _requiredStableCount = 3;
 
   // 点击|开始称重|
   void weightStartCallback() {
@@ -153,7 +153,9 @@ class SteelyardController extends GetxController {
         (callback) {
           if (_product == null) return;
           widget.value = callbackWidget.value;
-          final p = (callbackWidget.value * _product!.retailPrice).ceil();
+          // 获取价格
+          final productPrice = _getProudctPrice(_product!);
+          final p = (callbackWidget.value * productPrice).ceil();
           price.value = p;
           if ((widget.value - _lastWeight).abs() <= _weightTolerance) {
             _stableCount++;
@@ -166,7 +168,7 @@ class SteelyardController extends GetxController {
           }
           _lastWeight = widget.value;
           logger.i(
-            "|$_tag|重量|${widget.value}|单价|${_product!.retailPrice}|总价|${price.value}|稳定次数|$_stableCount|",
+            "|$_tag|重量|${widget.value}|单价|$productPrice|总价|${price.value}|稳定次数|$_stableCount|",
           );
         },
         time: const Duration(milliseconds: 100),
@@ -177,6 +179,14 @@ class SteelyardController extends GetxController {
       logger.e("|$_tag|打开并监听称串口失败error|$e|");
     }
   }
+
+  // 获取当前商品的价格,有促销价先用促销价
+  int _getProudctPrice(SupermarketSpuEntity product) {
+    if (product.promotionPrice != 0) {
+      return product.promotionPrice;
+    }
+    return product.retailPrice;
+  }
 }
 
 Widget steelyardEmpty(BuildContext context) {