hdong: #65.

src/Infrastructure/BotSharp.Abstraction/Users/IUserService.cs

@@ -10,4 +10,6 @@ public interface IUserService
     Task<Token> ActiveUser(UserActivationModel model);
     Task<Token?> GetToken(string authorization);
     Task<User> GetMyProfile();
+    Task<bool> VerifyUserUnique(string userName);
+    Task<bool> VerifyEmailUnique(string email);
 }

src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs

@@ -263,4 +263,30 @@ public class UserService : IUserService
         };
         return token;
     }
+
+    public async Task<bool> VerifyUserUnique(string userName)
+    {
+        if (string.IsNullOrEmpty(userName))
+            return false;
+
+        var db = _services.GetRequiredService<IBotSharpRepository>();
+        var user = db.GetUserByUserName(userName);
+        if (user == null)
+            return true;
+        
+        return false;
+    }
+
+    public async Task<bool> VerifyEmailUnique(string email)
+    {
+        if (string.IsNullOrEmpty(email))
+            return false;
+
+        var db = _services.GetRequiredService<IBotSharpRepository>();
+        var emailName = db.GetUserByEmail(email);
+        if (emailName == null)
+            return true;
+
+        return false;
+    }
 }

src/Infrastructure/BotSharp.OpenAPI/Controllers/UserController.cs

@@ -94,4 +94,18 @@ public class UserController : ControllerBase
         }
         return UserViewModel.FromUser(user);
     }
+
+    [AllowAnonymous]
+    [HttpPost("/user/unique/{username}")]
+    public async Task<bool> VerifyUserUnique([FromRoute] string userName)
+    {
+        return await _userService.VerifyUserUnique(userName);
+    }
+
+    [AllowAnonymous]
+    [HttpPost("/email/unique/{email}")]
+    public async Task<bool> VerifyEmailUnique([FromRoute]string email)
+    {
+        return await _userService.VerifyEmailUnique(email);
+    }
 }