feat(next): add sign in callback route (#348)

packages/next-sample/pages/api/sign-in-callback.ts

@@ -0,0 +1,3 @@
+import { logtoClient } from '../../libraries/logto';
+
+export default logtoClient.handleSignInCallback();

packages/next/src/index.test.ts

@@ -19,6 +19,7 @@ const setItem = jest.fn((key, value) => {
 const getItem = jest.fn();
 const save = jest.fn();
 const signIn = jest.fn();
+const handleSignInCallback = jest.fn();
 
 jest.mock('./storage', () =>
   jest.fn(() => ({
@@ -41,6 +42,7 @@ jest.mock('@logto/node', () =>
       navigate(signInUrl);
       signIn();
     },
+    handleSignInCallback,
   }))
 );
 
@@ -69,4 +71,21 @@ describe('Next', () => {
       expect(signIn).toHaveBeenCalled();
     });
   });
+
+  describe('handleSignInCallback', () => {
+    it('should call client.handleSignInCallback and redirect to home', async () => {
+      const client = new LogtoClient(configs);
+      await testApiHandler({
+        handler: client.handleSignInCallback(),
+        url: '/api/sign-in-callback',
+        test: async ({ fetch }) => {
+          const response = await fetch({ method: 'GET', redirect: 'manual' });
+          const headers = response.headers as Map<string, string>;
+          expect(headers.get('location')).toEqual(`${configs.baseUrl}/`);
+        },
+      });
+      expect(handleSignInCallback).toHaveBeenCalled();
+      expect(save).toHaveBeenCalled();
+    });
+  });
 });

packages/next/src/index.ts

@@ -21,6 +21,17 @@ export default class LogtoClient {
       }
     });
 
+  handleSignInCallback = (redirectTo = this.config.baseUrl): NextApiHandler =>
+    this.withIronSession(async (request, response) => {
+      const nodeClient = this.createNodeClient(request);
+
+      if (request.url) {
+        await nodeClient.handleSignInCallback(`${this.config.baseUrl}${request.url}`);
+        await this.storage?.save();
+        response.redirect(redirectTo);
+      }
+    });
+
   private createNodeClient(request: NextApiRequest) {
     this.storage = new NextStorage(request);