添加访客统计的接口

src/Store/Lib/VisitorCountInterface.php

+<?php
+/**
+ * This file is part of Swoft.
+ *
+ * @link https://swoft.org
+ * @document https://doc.swoft.org
+ * @contact group@swoft.org
+ * @license https://github.com/swoft-cloud/swoft/blob/master/LICENSE
+ */
+
+namespace Hdll\Services\Store\Lib;
+
+use Swoft\Core\ResultInterface;
+
+/**
+ * The interface of visitor-count service
+ *
+ * @method ResultInterface deferUpdateVisitorData(int $storeId, int $visitorId, array $data = [])
+ */
+interface VisitorCountInterface
+{
+    /**
+     * 根据店铺id和访客id更新一条访客记录
+     * 如果已有记录，会替换更新，如果没有，会新建一条记录
+     * 
+     * @param int $storeId
+     * @param int $visitorId
+     * @param array $data  此参数可选，不传表示只更新访问时间
+     * @return int 更新成功的条数
+     */
+    public function updateVisitorData(int $storeId, int $visitorId, array $data = []);
+    
+}
\ No newline at end of file