CCM-10424 Add redirect from create letter and unit tests

Author: nicki-nhs

frontend/src/__tests__/app/create-letter-template/page.test.tsx

@@ -2,15 +2,102 @@
  * @jest-environment node
  */
 import CreateLetterTemplatePage from '@app/create-letter-template/page';
+import { getSessionServer } from '@utils/amplify-utils';
+import { fetchClient } from '@utils/server-features';
+import { redirect, RedirectType } from 'next/navigation';
+
+jest.mock('next/navigation');
+jest.mock('@utils/amplify-utils');
+jest.mock('@utils/server-features');
+
+const mockGetSessionServer = jest.mocked(getSessionServer);
+const mockFetchClient = jest.mocked(fetchClient);
 
 describe('CreateLetterTemplatePage', () => {
   beforeEach(() => {
     jest.resetAllMocks();
   });
 
   it('should render CreateLetterTemplatePage', async () => {
+    mockGetSessionServer.mockResolvedValueOnce({
+      accessToken: 'mocktoken',
+      clientId: 'client1',
+      userSub: 'sub',
+    });
+    mockFetchClient.mockResolvedValueOnce({
+      data: {
+        campaignId: 'campaign2',
+        features: {},
+      },
+    });
+
     const page = await CreateLetterTemplatePage();
 
     expect(page).toMatchSnapshot();
   });
+
+  it('should check client ID and campaign ID', async () => {
+    mockGetSessionServer.mockResolvedValueOnce({
+      accessToken: 'mocktoken',
+      clientId: 'client1',
+      userSub: 'sub',
+    });
+    mockFetchClient.mockResolvedValueOnce({
+      data: {
+        campaignId: 'campaign2',
+        features: {},
+      },
+    });
+
+    await CreateLetterTemplatePage();
+
+    expect(mockGetSessionServer).toHaveBeenCalled();
+    expect(mockFetchClient).toHaveBeenCalled();
+  });
+
+  it('should redirect to error page when client ID is not present', async () => {
+    const mockRedirect = jest.mocked(redirect);
+
+    mockGetSessionServer.mockResolvedValueOnce({
+      accessToken: 'mocktoken',
+      clientId: undefined,
+      userSub: 'sub',
+    });
+    mockFetchClient.mockResolvedValueOnce({
+      data: {
+        campaignId: 'campaign2',
+        features: {},
+      },
+    });
+
+    await CreateLetterTemplatePage();
+
+    expect(mockRedirect).toHaveBeenCalledWith(
+      '/create-letter-template/client-id-and-campaign-id-required',
+      RedirectType.push
+    );
+  });
+
+  it('should redirect to error page when campaign ID is not present', async () => {
+    const mockRedirect = jest.mocked(redirect);
+
+    mockGetSessionServer.mockResolvedValueOnce({
+      accessToken: 'mocktoken',
+      clientId: 'client2',
+      userSub: 'sub',
+    });
+    mockFetchClient.mockResolvedValueOnce({
+      data: {
+        campaignId: undefined,
+        features: {},
+      },
+    });
+
+    await CreateLetterTemplatePage();
+
+    expect(mockRedirect).toHaveBeenCalledWith(
+      '/create-letter-template/client-id-and-campaign-id-required',
+      RedirectType.push
+    );
+  });
 });

frontend/src/app/create-letter-template/page.tsx

@@ -1,5 +1,8 @@
 import { CreateLetterTemplate } from 'nhs-notify-web-template-management-utils';
 import { LetterTemplateForm } from '@forms/LetterTemplateForm/LetterTemplateForm';
+import { getSessionServer } from '@utils/amplify-utils';
+import { redirect, RedirectType } from 'next/navigation';
+import { fetchClient } from '@utils/server-features';
 
 const CreateLetterTemplatePage = async () => {
   const initialState: CreateLetterTemplate = {
@@ -9,6 +12,25 @@ const CreateLetterTemplatePage = async () => {
     language: 'en',
   };
 
+  const sessionServer = await getSessionServer();
+  const { accessToken, clientId } = sessionServer;
+
+  if (!accessToken || !clientId)
+    return redirect(
+      '/create-letter-template/client-id-and-campaign-id-required',
+      RedirectType.push
+    );
+
+  const clientConfiguration = await fetchClient(accessToken);
+
+  const campaignId = clientConfiguration?.data?.campaignId;
+
+  if (!clientConfiguration || clientConfiguration.error || !campaignId)
+    return redirect(
+      '/create-letter-template/client-id-and-campaign-id-required',
+      RedirectType.push
+    );
+
   return <LetterTemplateForm initialState={initialState} />;
 };