feat：新增在线用户聊天消息通知

ZR.Admin.WebApi/Hubs/MessageHub.cs

@@ -81,5 +81,25 @@ namespace ZR.Admin.WebApi.Hubs
         }
 
         #endregion
+
+        /// <summary>
+        /// 注册信息
+        /// </summary>
+        /// <param name="connectId"></param>
+        /// <param name="userName"></param>
+        /// <param name="message"></param>
+        /// <returns></returns>
+        [HubMethodName("SendMessage")]
+        public async Task SendMessage(string connectId, string userName, string message)
+        {
+            Console.WriteLine($"{connectId},message={message}");
+            bool isDemoMode = AppSettings.GetAppConfig("DemoMode", true);
+            if (isDemoMode)
+            {
+                await Clients.Caller.SendAsync("receiveChat", new { userName, message = "当前环境为演示环境，消息不会发送给对方" });
+                return;
+            }
+            await Clients.Client(connectId).SendAsync("receiveChat", new { userName, message });
+        }
     }
 }