From 34305283aca89b8b2ebacd26ad3faf859a6a78b0 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Fri, 25 Mar 2022 20:20:47 +0800
Subject: …
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---
 BackEnd/Timeline/Services/User/UserServiceExtensions.cs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 BackEnd/Timeline/Services/User/UserServiceExtensions.cs

(limited to 'BackEnd/Timeline/Services/User/UserServiceExtensions.cs')

diff --git a/BackEnd/Timeline/Services/User/UserServiceExtensions.cs b/BackEnd/Timeline/Services/User/UserServiceExtensions.cs
new file mode 100644
index 00000000..82b55fba
--- /dev/null
+++ b/BackEnd/Timeline/Services/User/UserServiceExtensions.cs
@@ -0,0 +1,17 @@
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Timeline.Services.User
+{
+    public static class UserServiceExtensions
+    {
+        public static async Task ThrowIfUserNotExist(this IUserService service, long userId)
+        {
+            if (!await service.CheckUserExistenceAsync(userId))
+            {
+                throw new EntityNotExistException(EntityTypes.User,
+                    new Dictionary<string, object> { ["id"] = userId });
+            }
+        }
+    }
+}
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