From 8e2a97e39ffdc981475b02b1bc98a3c2eb2ab69a Mon Sep 17 00:00:00 2001
From: Haiping Chen <haiping008@gmail.com>
Date: Sat, 11 May 2024 22:22:14 -0500
Subject: [PATCH] Add UserLanguage to IUserIdentity

---
 .../BotSharp.Abstraction/Users/IUserIdentity.cs        |  1 +
 .../BotSharp.Core/Users/Services/UserIdentity.cs       | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/src/Infrastructure/BotSharp.Abstraction/Users/IUserIdentity.cs b/src/Infrastructure/BotSharp.Abstraction/Users/IUserIdentity.cs
index a0998117..4fecb48c 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Users/IUserIdentity.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Users/IUserIdentity.cs
@@ -8,4 +8,5 @@ public interface IUserIdentity
     string FirstName { get; }
     string LastName { get; }
     string FullName { get; }
+    string? UserLanguage { get; }
 }
diff --git a/src/Infrastructure/BotSharp.Core/Users/Services/UserIdentity.cs b/src/Infrastructure/BotSharp.Core/Users/Services/UserIdentity.cs
index b8acdeea..a8eaac5e 100644
--- a/src/Infrastructure/BotSharp.Core/Users/Services/UserIdentity.cs
+++ b/src/Infrastructure/BotSharp.Core/Users/Services/UserIdentity.cs
@@ -56,4 +56,14 @@ public class UserIdentity : IUserIdentity
             return $"{FirstName} {LastName}".Trim();
         }
     }
+
+    [JsonPropertyName("user_language")]
+    public string? UserLanguage
+    {
+        get
+        {
+            _contextAccessor.HttpContext.Request.Headers.TryGetValue("User-Language", out var languages);
+            return languages.FirstOrDefault();
+        }
+    }
 }