From 299512d391f5dfe6772a707d572b6555d861a028 Mon Sep 17 00:00:00 2001
From: maliming <malimings@gmail.com>
Date: Thu, 13 Feb 2025 11:47:49 +0800
Subject: [PATCH] Add custom IdentityErrorDescriber for localized error
 messages.

---
 .../Abp/Identity/AbpIdentityErrorDescriber.cs | 33 +++++++++++++++++++
 .../AbpIdentityUserValidator_Tests.cs         | 11 +++++++
 2 files changed, 44 insertions(+)
 create mode 100644 modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/AbpIdentityErrorDescriber.cs

diff --git a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/AbpIdentityErrorDescriber.cs b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/AbpIdentityErrorDescriber.cs
new file mode 100644
index 0000000000..3dea11faea
--- /dev/null
+++ b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/AbpIdentityErrorDescriber.cs
@@ -0,0 +1,33 @@
+using JetBrains.Annotations;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Localization;
+using Volo.Abp.DependencyInjection;
+using Volo.Abp.Identity.Localization;
+using Volo.Abp.Localization;
+
+namespace Volo.Abp.Identity;
+
+[Dependency(ServiceLifetime.Scoped, ReplaceServices = true)]
+[ExposeServices(typeof(IdentityErrorDescriber))]
+public class AbpIdentityErrorDescriber : IdentityErrorDescriber
+{
+    protected IStringLocalizer<IdentityResource> Localizer { get; }
+
+    public AbpIdentityErrorDescriber(IStringLocalizer<IdentityResource> localizer)
+    {
+        Localizer = localizer;
+    }
+
+    public override IdentityError InvalidUserName([CanBeNull] string userName)
+    {
+        using (CultureHelper.Use("en"))
+        {
+            return new IdentityError
+            {
+                Code = nameof(InvalidUserName),
+                Description = Localizer["Volo.Abp.Identity:InvalidUserName", userName ?? ""]
+            };
+        }
+    }
+}
diff --git a/modules/identity/test/Volo.Abp.Identity.AspNetCore.Tests/Volo/Abp/Identity/AspNetCore/AbpIdentityUserValidator_Tests.cs b/modules/identity/test/Volo.Abp.Identity.AspNetCore.Tests/Volo/Abp/Identity/AspNetCore/AbpIdentityUserValidator_Tests.cs
index 6af6b4ff57..6b656fbec4 100644
--- a/modules/identity/test/Volo.Abp.Identity.AspNetCore.Tests/Volo/Abp/Identity/AspNetCore/AbpIdentityUserValidator_Tests.cs
+++ b/modules/identity/test/Volo.Abp.Identity.AspNetCore.Tests/Volo/Abp/Identity/AspNetCore/AbpIdentityUserValidator_Tests.cs
@@ -19,6 +19,17 @@ public class AbpIdentityUserValidator_Tests : AbpIdentityAspNetCoreTestBase
         Localizer = GetRequiredService<IStringLocalizer<IdentityResource>>();
     }
 
+    [Fact]
+    public async Task InvalidUserName_Messages_Test()
+    {
+        var user = new IdentityUser(Guid.NewGuid(), "abp 123", "user@volosoft.com");
+        var identityResult = await _identityUserManager.CreateAsync(user);
+        identityResult.Succeeded.ShouldBeFalse();
+        identityResult.Errors.Count().ShouldBe(1);
+        identityResult.Errors.First().Code.ShouldBe("InvalidUserName");
+        identityResult.Errors.First().Description.ShouldBe(Localizer["Volo.Abp.Identity:InvalidUserName", "abp 123"]);
+    }
+
     [Fact]
     public async Task Can_Not_Use_Another_Users_Email_As_Your_Username_Test()
     {