VIA-629 SB Allow override of current datetime via a "x-e2e-datetime" header.

Author: acerathereinspirative-nhs-nvir

src/services/content-api/parsers/custom/covid-19.test.ts

@@ -5,9 +5,11 @@ import { Campaigns } from "@src/utils/campaigns/types";
 import config from "@src/utils/config";
 import { ConfigMock, configBuilder } from "@test-data/config/builders";
 import { genericVaccineContentAPIResponse } from "@test-data/content-api/data";
+import { headers } from "next/headers";
 
 jest.mock("sanitize-data", () => ({ sanitize: jest.fn() }));
 jest.mock("@src/services/nbs/nbs-service", () => ({ buildNbsUrl: jest.fn() }));
+jest.mock("next/headers");
 
 describe("buildFilteredContentForCovid19Vaccine", () => {
   const mockedConfig = config as ConfigMock;
@@ -28,6 +30,11 @@ describe("buildFilteredContentForCovid19Vaccine", () => {
     Object.assign(mockedConfig, defaultConfig);
 
     (buildNbsUrl as jest.Mock).mockResolvedValue(new URL("https://test-nbs-url.example.com/sausages"));
+
+    const mockHeaders = {
+      get: jest.fn(),
+    };
+    (headers as jest.Mock).mockResolvedValue(mockHeaders);
   });
 
   jest.useFakeTimers();
@@ -112,4 +119,36 @@ describe("buildFilteredContentForCovid19Vaccine", () => {
     expect(pageCopy).toEqual(expect.objectContaining(expected));
     expect(pageCopy.callout).toBeUndefined();
   });
+
+  describe("with x-e2e-datetime header set", () => {
+    it("should return a callout but no actions when no campaign is active", async () => {
+      const mockHeaders = {
+        get: jest.fn((key: string) => {
+          if (key === "x-e2e-datetime") return "2025-10-01T12:00:00Z";
+          return null;
+        }),
+      };
+      (headers as jest.Mock).mockResolvedValue(mockHeaders);
+
+      const pageCopy = await buildFilteredContentForCovid19Vaccine(JSON.stringify(genericVaccineContentAPIResponse));
+
+      expect(pageCopy.callout).not.toBeUndefined();
+      expect(pageCopy.actions).toHaveLength(0);
+    });
+
+    it("should return actions but no callout when no campaign is active", async () => {
+      const mockHeaders = {
+        get: jest.fn((key: string) => {
+          if (key === "x-e2e-datetime") return "2025-12-01T12:00:00Z";
+          return null;
+        }),
+      };
+      (headers as jest.Mock).mockResolvedValue(mockHeaders);
+
+      const pageCopy = await buildFilteredContentForCovid19Vaccine(JSON.stringify(genericVaccineContentAPIResponse));
+
+      expect(pageCopy.callout).toBeUndefined();
+      expect(pageCopy.actions).not.toHaveLength(0);
+    });
+  });
 });

src/services/content-api/parsers/custom/covid-19.tsx

@@ -11,19 +11,22 @@ import {
 } from "@src/services/eligibility-api/types";
 import { buildNbsUrl } from "@src/services/nbs/nbs-service";
 import config from "@src/utils/config";
+import { UtcDateTimeFromStringSchema } from "@src/utils/date";
 import { logger } from "@src/utils/logger";
+import { headers } from "next/headers";
 import { Logger } from "pino";
 
-const log: Logger = logger.child({ module: "covid-19" });
+const log: Logger = logger.child({ module: "content-api-parsers-custom-covid-19" });
 
 export const buildFilteredContentForCovid19Vaccine = async (apiContent: string): Promise<VaccinePageContent> => {
   const campaigns = await config.CAMPAIGNS;
+  const now = await _getNow();
 
   const standardFilteredContent = await buildFilteredContentForStandardVaccine(apiContent);
 
   let callout: HeadingWithTypedContent | undefined;
   const actions: Action[] = [];
-  if (campaigns.isActive(VaccineType.COVID_19)) {
+  if (campaigns.isActive(VaccineType.COVID_19, now)) {
     log.debug({ context: { campaigns, vaccineType: VaccineType.COVID_19 } }, "Campaign active");
     callout = undefined;
     actions.push(...(await _buildActions()));
@@ -51,6 +54,13 @@ export const buildFilteredContentForCovid19Vaccine = async (apiContent: string):
   return { ...standardFilteredContent, callout, recommendation, actions };
 };
 
+async function _getNow() {
+  const headersList = await headers();
+  const now = UtcDateTimeFromStringSchema.safeParse(headersList.get("x-e2e-datetime")).data ?? new Date();
+  log.debug({ context: { headersList, now: now.toDateString() } }, "headers");
+  return now;
+}
+
 async function _buildActions(): Promise<Action[]> {
   const nbsURl = (await buildNbsUrl(VaccineType.COVID_19)) as ButtonUrl;