<fix>(waitAndBuy): fix the bug that will due to repeat buy

.idea/workspace.xml

@@ -3,6 +3,8 @@
   <component name="ChangeListManager">
     <list default="true" id="557626c8-a0b7-4bf6-b000-aaaff199c3dd" name="默认更改列表" comment="">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/WaitingAndBuy.py" beforeDir="false" afterPath="$PROJECT_DIR$/WaitingAndBuy.py" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/main.py" beforeDir="false" afterPath="$PROJECT_DIR$/main.py" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -71,6 +73,7 @@
       <workItem from="1625960646818" duration="5632000" />
       <workItem from="1625970377756" duration="5103000" />
       <workItem from="1626100177418" duration="1278000" />
+      <workItem from="1626104617311" duration="879000" />
     </task>
     <servers />
   </component>

WaitingAndBuy.py

@@ -711,8 +711,22 @@ class Waiter():
     @check_login
     def initCart(self):
         sku_id = global_config.getRaw('config', 'sku_id')
-        self.add_item_to_cart(sku_id)
         self.cancel_select_all_cart_item()
+        cart = self.cart_detail()
+        if sku_id in cart:
+            logger.info('%s 已在购物车中，调整数量为 %s', sku_id, 1)
+            cart_item = cart.get(sku_id)
+            self.change_item_num_in_cart(
+                sku_id=sku_id,
+                vender_id=cart_item.get('vender_id'),
+                num=1,
+                p_type=cart_item.get('p_type'),
+                target_id=cart_item.get('target_id'),
+                promo_id=cart_item.get('promo_id')
+            )
+        else:
+            self.add_item_to_cart(sku_id)
+        logger.info('购物车初始化结束，程序开始后请勿更改购物车')
 
     @check_login
     def fastBuy(self):