fix(user): Updating user info when authenticating with external IDP (#11046)

# Which Problems Are Solved

User profile updates were not propagated when using External OIDC IDP +
Login V2

# How the Problems Are Solved

* `UpdateHumanUserRequest` is added to
`RetrieveIdentityProviderIntentResponse`
* `UpdateHumanUserRequest` is returned in the
`RetrieveIdentityProviderIntentResponse` when the user already exists
during external IDP auth, which is then used in the frontend to update
the user info

# Additional Changes

* Moved integration tests related to user intent to a separate test file
* Fix redirection after external IDP user registration

# Additional Context
- Closes #10838
- Follow up: https://github.com/zitadel/zitadel/issues/11053

---------

Co-authored-by: Max Peintner <peintnerm@gmail.com>
(cherry picked from commit d7e9eddb76)

apps/login/src/components/register-form-idp-incomplete.tsx

@@ -4,6 +4,7 @@ import { registerUserAndLinkToIDP } from "@/lib/server/register";
 import { useState } from "react";
 import { useTranslations } from "next-intl";
 import { FieldValues, useForm } from "react-hook-form";
+import { useRouter } from "next/navigation";
 import { Alert } from "./alert";
 import { BackButton } from "./back-button";
 import { Button, ButtonVariants } from "./button";
@@ -55,6 +56,7 @@ export function RegisterFormIDPIncomplete({
   });
 
   const t = useTranslations("register");
+  const router = useRouter();
 
   const [loading, setLoading] = useState<boolean>(false);
   const [error, setError] = useState<string>("");
@@ -85,7 +87,9 @@ export function RegisterFormIDPIncomplete({
       return;
     }
 
-    // If no error, the function has already handled the redirect
+    if (response && "redirect" in response && response.redirect) {
+      return router.push(response.redirect);
+    }
   }
 
   const { errors } = formState;

apps/login/src/lib/server/idp-intent.test.ts

@@ -76,6 +76,17 @@ describe("processIDPCallback", () => {
         email: "test@example.com",
       },
     },
+    updateHumanUser: {
+      username: "testuser",
+      profile: {
+        givenName: "Test",
+        familyName: "User 1",
+        displayName: "Test User 1",
+      },
+      email: {
+        email: "test@example.com",
+      },
+    },
   };
 
   const defaultIdp = {
@@ -257,8 +268,8 @@ describe("processIDPCallback", () => {
         serviceUrl: "https://api.example.com",
         request: expect.objectContaining({
           userId: "user123",
-          profile: defaultIntent.addHumanUser.profile,
-          email: defaultIntent.addHumanUser.email,
+          profile: defaultIntent.updateHumanUser.profile,
+          email: defaultIntent.updateHumanUser.email,
         }),
       });
     });

apps/login/src/lib/server/idp-intent.ts

@@ -119,7 +119,7 @@ export async function processIDPCallback({
 
     console.log("[IDP Process] Intent retrieved successfully, processing business logic");
 
-    const { idpInformation, userId, addHumanUser } = intent;
+    const { idpInformation, userId, addHumanUser, updateHumanUser } = intent;
 
     if (!idpInformation) {
       console.error("[IDP Process] IDP information missing");
@@ -161,15 +161,15 @@ export async function processIDPCallback({
     // ============================================
     if (userId && !link) {
       // Auto-update user if enabled
-      if (options?.isAutoUpdate && addHumanUser) {
+      if (options?.isAutoUpdate && updateHumanUser) {
         try {
           await updateHuman({
             serviceUrl,
             request: create(UpdateHumanUserRequestSchema, {
               userId: userId,
-              profile: addHumanUser.profile,
-              email: addHumanUser.email,
-              phone: addHumanUser.phone,
+              profile: updateHumanUser.profile,
+              email: updateHumanUser.email,
+              phone: updateHumanUser.phone,
             }),
           });
           console.log("[IDP Process] User auto-updated successfully");

internal/api/grpc/user/v2/intent.go

@@ -169,7 +169,6 @@ func (s *Server) RetrieveIdentityProviderIntent(ctx context.Context, req *connec
 	if err != nil {
 		return nil, err
 	}
-	if idpIntent.UserId == "" {
 	provider, err := s.command.GetProvider(ctx, idpIntent.IdpInformation.IdpId, "", "")
 	if err != nil && !errors.Is(err, oidc_pkg.ErrDiscoveryFailed) {
 		return nil, err
@@ -202,7 +201,10 @@ func (s *Server) RetrieveIdentityProviderIntent(ctx context.Context, req *connec
 	if err != nil {
 		return nil, err
 	}
+	if idpIntent.UserId == "" {
 		idpIntent.AddHumanUser = idpUserToAddHumanUser(idpUser, idpIntent.IdpInformation.IdpId)
+	} else {
+		idpIntent.UpdateHumanUser = idpUserToUpdateHumanUser(intent.UserID, idpUser)
 	}
 	return connect.NewResponse(idpIntent), nil
 }
@@ -377,3 +379,44 @@ func idpUserToAddHumanUser(idpUser idp.User, idpID string) *user.AddHumanUserReq
 	}
 	return addHumanUser
 }
+
+func idpUserToUpdateHumanUser(userID string, idpUser idp.User) *user.UpdateHumanUserRequest {
+	updateHumanUser := &user.UpdateHumanUserRequest{
+		UserId: userID,
+		Profile: &user.SetHumanProfile{
+			GivenName:  idpUser.GetFirstName(),
+			FamilyName: idpUser.GetLastName(),
+		},
+	}
+	if username := idpUser.GetPreferredUsername(); username != "" {
+		updateHumanUser.Username = &username
+	}
+	if nickName := idpUser.GetNickname(); nickName != "" {
+		updateHumanUser.Profile.NickName = &nickName
+	}
+	if displayName := idpUser.GetDisplayName(); displayName != "" {
+		updateHumanUser.Profile.DisplayName = &displayName
+	}
+	if lang := idpUser.GetPreferredLanguage().String(); lang != "" {
+		updateHumanUser.Profile.PreferredLanguage = &lang
+	}
+	if email := string(idpUser.GetEmail()); email != "" {
+		updateHumanUser.Email = &user.SetHumanEmail{
+			Email:        email,
+			Verification: &user.SetHumanEmail_SendCode{},
+		}
+		if isEmailVerified := idpUser.IsEmailVerified(); isEmailVerified {
+			updateHumanUser.Email.Verification = &user.SetHumanEmail_IsVerified{IsVerified: isEmailVerified}
+		}
+	}
+	if phone := string(idpUser.GetPhone()); phone != "" {
+		updateHumanUser.Phone = &user.SetHumanPhone{
+			Phone:        phone,
+			Verification: &user.SetHumanPhone_SendCode{},
+		}
+		if isPhoneVerified := idpUser.IsPhoneVerified(); isPhoneVerified {
+			updateHumanUser.Phone.Verification = &user.SetHumanPhone_IsVerified{IsVerified: isPhoneVerified}
+		}
+	}
+	return updateHumanUser
+}

proto/zitadel/user/v2/user_service.proto

@@ -3093,6 +3093,7 @@ message RetrieveIdentityProviderIntentResponse{
     }
   ];
   AddHumanUserRequest add_human_user = 4;
+  UpdateHumanUserRequest update_human_user = 5;
 }
 
 message AddIDPLinkRequest{