feat(work): 封装部分企业微信回调通知事件模型

src/SKIT.FlurlHttpClient.Wechat.Work/Extensions/WechatWorkClientEventExtensions.cs

@@ -0,0 +1,44 @@
+using System;
+using System.IO;
+using System.Xml.Serialization;
+
+namespace SKIT.FlurlHttpClient.Wechat.Work
+{
+    /// <summary>
+    /// 为 <see cref="WechatWorkClient"/> 提供回调通知事件的扩展方法。
+    /// </summary>
+    public static class WechatWorkClientEventExtensions
+    {
+        /// <summary>
+        /// <para>从 JSON 反序列化得到 <see cref="WechatWorkEvent"/> 对象。</para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="callbackJson"></param>
+        /// <returns></returns>
+        public static TEvent DeserializeEventFromJson<TEvent>(this WechatWorkClient client, string callbackJson)
+            where TEvent : WechatWorkEvent, WechatWorkEvent.Types.IJsonSerializable, new()
+        {
+            if (client == null) throw new ArgumentNullException(nameof(client));
+            if (string.IsNullOrEmpty(callbackJson)) throw new ArgumentNullException(callbackJson);
+
+            return client.JsonSerializer.Deserialize<TEvent>(callbackJson);
+        }
+
+        /// <summary>
+        /// <para>从 XML 反序列化得到 <see cref="WechatWorkEvent"/> 对象。</para>
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="callbackXml"></param>
+        /// <returns></returns>
+        public static TEvent DeserializeEventFromXml<TEvent>(this WechatWorkClient client, string callbackXml)
+            where TEvent : WechatWorkEvent, WechatWorkEvent.Types.IXmlSerializable, new()
+        {
+            if (client == null) throw new ArgumentNullException(nameof(client));
+            if (string.IsNullOrEmpty(callbackXml)) throw new ArgumentNullException(callbackXml);
+
+            using StringReader reader = new StringReader(callbackXml);
+            XmlSerializer xmlSerializer = new XmlSerializer(typeof(TEvent), new XmlRootAttribute("xml"));
+            return (TEvent)xmlSerializer.Deserialize(reader);
+        }
+    }
+}