feat(clerk-js): Redirect on session exists during sign-in

.changeset/chubby-memes-kiss.md

@@ -0,0 +1,5 @@
+---
+'@clerk/clerk-js': minor
+---
+
+When a session already exists on sign in, complete the sign in and redirect instead of only rendering an error.

integration/tests/oauth-flows.test.ts

@@ -256,5 +256,26 @@ testAgainstRunningApps({ withEnv: [appConfigs.envs.withLegalConsent] })(
 
       await u.page.waitForAppUrl('/protected');
     });
+
+    test('redirects when attempting OAuth sign in with existing session', async ({ page, context }) => {
+      const u = createTestUtils({ app, page, context });
+
+      // First, sign in the user via OAuth
+      await u.po.signIn.goTo();
+      await u.page.getByRole('button', { name: 'E2E OAuth Provider' }).click();
+      await u.page.getByText('Sign in to oauth-provider').waitFor();
+      await u.po.signIn.setIdentifier(fakeUser.email);
+      await u.po.signIn.continue();
+      await u.po.signIn.enterTestOtpCode();
+      await u.page.getByText('SignedIn').waitFor();
+      await u.po.expect.toBeSignedIn();
+
+      // Now attempt to sign in again via OAuth while already signed in
+      await u.po.signIn.goTo();
+      await u.page.getByRole('button', { name: 'E2E OAuth Provider' }).click();
+
+      // Should redirect and remain signed in instead of showing an error
+      await u.po.expect.toBeSignedIn();
+    });
   },
 );

integration/tests/sign-in-flow.test.ts

@@ -150,4 +150,45 @@ testAgainstRunningApps({ withEnv: [appConfigs.envs.withEmailCodes] })('sign in f
 
     await u.po.expect.toBeSignedIn();
   });
+
+  test('redirects when attempting to sign in with existing session', async ({ page, context }) => {
+    const u = createTestUtils({ app, page, context });
+
+    // First, sign in the user
+    await u.po.signIn.goTo();
+    await u.po.signIn.setIdentifier(fakeUser.email);
+    await u.po.signIn.continue();
+    await u.po.signIn.setPassword(fakeUser.password);
+    await u.po.signIn.continue();
+    await u.po.expect.toBeSignedIn();
+
+    // Now attempt to go to sign-in page again while already signed in
+    await u.po.signIn.goTo();
+
+    // User should be redirected and remain signed in instead of seeing an error
+    await u.po.expect.toBeSignedIn();
+  });
+
+  test('redirects when attempting to sign in again with instant password and existing session', async ({
+    page,
+    context,
+  }) => {
+    const u = createTestUtils({ app, page, context });
+
+    // First, sign in the user
+    await u.po.signIn.goTo();
+    await u.po.signIn.signInWithEmailAndInstantPassword({ email: fakeUser.email, password: fakeUser.password });
+    await u.po.expect.toBeSignedIn();
+
+    // Clear the page to go back to sign-in
+    await u.page.goToRelative('/');
+    await u.po.expect.toBeSignedIn();
+
+    // Attempt to sign in again with instant password
+    await u.po.signIn.goTo();
+    await u.po.signIn.signInWithEmailAndInstantPassword({ email: fakeUser.email, password: fakeUser.password });
+
+    // Should redirect and remain signed in without error
+    await u.po.expect.toBeSignedIn();
+  });
 });

packages/clerk-js/src/core/constants.ts

@@ -27,6 +27,7 @@ export const ERROR_CODES = {
   SAML_USER_ATTRIBUTE_MISSING: 'saml_user_attribute_missing',
   USER_LOCKED: 'user_locked',
   EXTERNAL_ACCOUNT_NOT_FOUND: 'external_account_not_found',
+  SESSION_EXISTS: 'session_exists',
   SIGN_UP_MODE_RESTRICTED: 'sign_up_mode_restricted',
   SIGN_UP_MODE_RESTRICTED_WAITLIST: 'sign_up_restricted_waitlist',
   ENTERPRISE_SSO_USER_ATTRIBUTE_MISSING: 'enterprise_sso_user_attribute_missing',

packages/clerk-js/src/ui/components/OrganizationList/UserMembershipList.tsx

@@ -1,7 +1,7 @@
+import { isClerkAPIResponseError } from '@clerk/shared/error';
 import { useOrganizationList, useUser } from '@clerk/shared/react';
 import type { OrganizationResource } from '@clerk/shared/types';
 
-import { isClerkAPIResponseError } from '@/index.headless';
 import { sharedMainIdentifierSx } from '@/ui/common/organizations/OrganizationPreview';
 import { localizationKeys, useLocalizations } from '@/ui/customizables';
 import { useCardState, withCardStateProvider } from '@/ui/elements/contexts';

packages/clerk-js/src/ui/components/SignIn/SignInSocialButtons.tsx

@@ -1,8 +1,11 @@
+import type { ClerkAPIError } from '@clerk/shared/error';
+import { isClerkAPIResponseError } from '@clerk/shared/error';
 import { useClerk } from '@clerk/shared/react';
 import type { PhoneCodeChannel } from '@clerk/shared/types';
 import React from 'react';
 
-import { handleError } from '@/ui/utils/errorHandler';
+import { ERROR_CODES } from '@/core/constants';
+import { handleError as _handleError } from '@/ui/utils/errorHandler';
 import { originPrefersPopup } from '@/ui/utils/originPrefersPopup';
 import { web3CallbackErrorHandler } from '@/ui/utils/web3CallbackErrorHandler';
 
@@ -30,10 +33,29 @@ export const SignInSocialButtons = React.memo((props: SignInSocialButtonsProps)
   const shouldUsePopup = ctx.oauthFlow === 'popup' || (ctx.oauthFlow === 'auto' && originPrefersPopup());
   const { onAlternativePhoneCodeProviderClick, ...rest } = props;
 
+  const handleError = (err: any) => {
+    if (isClerkAPIResponseError(err)) {
+      const sessionAlreadyExistsError: ClerkAPIError | undefined = err.errors.find(
+        (e: ClerkAPIError) => e.code === ERROR_CODES.SESSION_EXISTS,
+      );
+
+      if (sessionAlreadyExistsError) {
+        return clerk.setActive({
+          session: clerk.client.lastActiveSessionId,
+          navigate: async ({ session }) => {
+            await ctx.navigateOnSetActive({ session, redirectUrl: ctx.afterSignInUrl });
+          },
+        });
+      }
+    }
+
+    return _handleError(err, [], card.setError);
+  };
+
   return (
     <SocialButtons
       {...rest}
-      showLastAuthenticationStrategy={true}
+      showLastAuthenticationStrategy
       idleAfterDelay={!shouldUsePopup}
       oauthCallback={strategy => {
         if (shouldUsePopup) {
@@ -50,12 +72,12 @@ export const SignInSocialButtons = React.memo((props: SignInSocialButtonsProps)
 
           return signIn
             .authenticateWithPopup({ strategy, redirectUrl, redirectUrlComplete, popup, oidcPrompt: ctx.oidcPrompt })
-            .catch(err => handleError(err, [], card.setError));
+            .catch(err => handleError(err));
         }
 
         return signIn
           .authenticateWithRedirect({ strategy, redirectUrl, redirectUrlComplete, oidcPrompt: ctx.oidcPrompt })
-          .catch(err => handleError(err, [], card.setError));
+          .catch(err => handleError(err));
       }}
       web3Callback={strategy => {
         return clerk

packages/clerk-js/src/ui/components/SignIn/SignInStart.tsx

@@ -432,6 +432,9 @@ function SignInStartInternal(): JSX.Element {
         e.code === ERROR_CODES.FORM_PASSWORD_PWNED,
     );
 
+    const sessionAlreadyExistsError: ClerkAPIError = e.errors.find(
+      (e: ClerkAPIError) => e.code === ERROR_CODES.SESSION_EXISTS,
+    );
     const alreadySignedInError: ClerkAPIError = e.errors.find(
       (e: ClerkAPIError) => e.code === 'identifier_already_signed_in',
     );
@@ -442,6 +445,13 @@ function SignInStartInternal(): JSX.Element {
 
     if (instantPasswordError) {
       await signInWithFields(identifierField);
+    } else if (sessionAlreadyExistsError) {
+      await clerk.setActive({
+        session: clerk.client.lastActiveSessionId,
+        navigate: async ({ session }) => {
+          await navigateOnSetActive({ session, redirectUrl: afterSignInUrl });
+        },
+      });
     } else if (alreadySignedInError) {
       // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
       const sid = alreadySignedInError.meta!.sessionId!;

packages/clerk-js/src/ui/components/SignIn/__tests__/SignInStart.test.tsx

@@ -252,6 +252,38 @@ describe('SignInStart', () => {
         expect(icon.length).toEqual(1);
       });
     });
+
+    it('redirects user when session_exists error is returned during OAuth sign-in', async () => {
+      const { wrapper, fixtures } = await createFixtures(f => {
+        f.withSocialProvider({ provider: 'google' });
+      });
+
+      const sessionExistsError = new ClerkAPIResponseError('Error', {
+        data: [
+          {
+            code: 'session_exists',
+            long_message: 'A session already exists',
+            message: 'Session exists',
+          },
+        ],
+        status: 422,
+      });
+
+      fixtures.clerk.client.lastActiveSessionId = 'sess_123';
+      fixtures.signIn.authenticateWithRedirect.mockRejectedValueOnce(sessionExistsError);
+
+      const { userEvent } = render(<SignInStart />, { wrapper });
+
+      const googleButton = screen.getByText('Continue with Google');
+      await userEvent.click(googleButton);
+
+      await waitFor(() => {
+        expect(fixtures.clerk.setActive).toHaveBeenCalledWith({
+          session: 'sess_123',
+          navigate: expect.any(Function),
+        });
+      });
+    });
   });
 
   describe('navigation', () => {
@@ -523,6 +555,76 @@ describe('SignInStart', () => {
     });
   });
 
+  describe('Session already exists error handling', () => {
+    it('redirects user when session_exists error is returned during sign-in', async () => {
+      const { wrapper, fixtures } = await createFixtures(f => {
+        f.withEmailAddress();
+      });
+
+      const sessionExistsError = new ClerkAPIResponseError('Error', {
+        data: [
+          {
+            code: 'session_exists',
+            long_message: 'A session already exists',
+            message: 'Session exists',
+          },
+        ],
+        status: 422,
+      });
+
+      fixtures.clerk.client.lastActiveSessionId = 'sess_123';
+      fixtures.signIn.create.mockRejectedValueOnce(sessionExistsError);
+
+      const { userEvent } = render(<SignInStart />, { wrapper });
+
+      await userEvent.type(screen.getByLabelText(/email address/i), '[email protected]');
+      await userEvent.click(screen.getByText('Continue'));
+
+      await waitFor(() => {
+        expect(fixtures.clerk.setActive).toHaveBeenCalledWith({
+          session: 'sess_123',
+          navigate: expect.any(Function),
+        });
+      });
+    });
+
+    it('calls navigate after setting session active on session_exists error', async () => {
+      const { wrapper, fixtures } = await createFixtures(f => {
+        f.withEmailAddress();
+      });
+
+      const sessionExistsError = new ClerkAPIResponseError('Error', {
+        data: [
+          {
+            code: 'session_exists',
+            long_message: 'A session already exists',
+            message: 'Session exists',
+          },
+        ],
+        status: 422,
+      });
+
+      fixtures.clerk.client.lastActiveSessionId = 'sess_123';
+      fixtures.signIn.create.mockRejectedValueOnce(sessionExistsError);
+
+      const mockSession = { id: 'sess_123' } as any;
+      (fixtures.clerk.setActive as any).mockImplementation(
+        async ({ navigate }: { navigate: ({ session }: { session: any }) => Promise<void> }) => {
+          await navigate({ session: mockSession });
+        },
+      );
+
+      const { userEvent } = render(<SignInStart />, { wrapper });
+
+      await userEvent.type(screen.getByLabelText(/email address/i), '[email protected]');
+      await userEvent.click(screen.getByText('Continue'));
+
+      await waitFor(() => {
+        expect(fixtures.clerk.setActive).toHaveBeenCalled();
+      });
+    });
+  });
+
   describe('ticket flow', () => {
     it('calls the appropriate resource function upon detecting the ticket', async () => {
       const { wrapper, fixtures } = await createFixtures(f => {

packages/clerk-js/src/ui/components/SignUp/SignUpStart.tsx

@@ -1,9 +1,9 @@
 import { getAlternativePhoneCodeProviderData } from '@clerk/shared/alternativePhoneCode';
+import { isClerkAPIResponseError } from '@clerk/shared/error';
 import { useClerk } from '@clerk/shared/react';
 import type { PhoneCodeChannel, PhoneCodeChannelData, SignUpResource } from '@clerk/shared/types';
 import React from 'react';
 
-import { isClerkAPIResponseError } from '@/index.headless';
 import { Card } from '@/ui/elements/Card';
 import { useCardState, withCardStateProvider } from '@/ui/elements/contexts';
 import { Header } from '@/ui/elements/Header';