feat(api): add charge-stripe and create-stripe-payment-intent endpoints (#54545)

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

api/src/utils/validate-donation.test.ts

@@ -0,0 +1,29 @@
+import { inLastFiveMinutes } from './validate-donation';
+
+describe('inLastFiveMinutes', () => {
+  beforeAll(() => {
+    jest.useFakeTimers();
+  });
+
+  afterAll(() => {
+    jest.useRealTimers();
+  });
+
+  it('should return true if the timestamp is within the last five minutes', () => {
+    const currentTimestamp = Math.floor(Date.now() / 1000);
+    const recentTimestamp = currentTimestamp - 100;
+    expect(inLastFiveMinutes(recentTimestamp)).toBe(true);
+  });
+
+  it('should return false if the timestamp is more than five minutes ago', () => {
+    const currentTimestamp = Math.floor(Date.now() / 1000);
+    const oldTimestamp = currentTimestamp - 400;
+    expect(inLastFiveMinutes(oldTimestamp)).toBe(false);
+  });
+
+  it('should return true if the timestamp is exactly five minutes ago', () => {
+    const currentTimestamp = Math.floor(Date.now() / 1000);
+    const exactTimestamp = currentTimestamp - 300;
+    expect(inLastFiveMinutes(exactTimestamp)).toBe(true);
+  });
+});

api/src/utils/validate-donation.ts

@@ -0,0 +1,10 @@
+/**
+ * Checks if a timestamp was created within five minutes.
+ * @param unixTimestamp - A unix timestamp .
+ * @returns - The generated email template.
+ */
+export const inLastFiveMinutes = (unixTimestamp: number) => {
+  const currentTimestamp = Math.floor(Date.now() / 1000);
+  const timeDifference = currentTimestamp - unixTimestamp;
+  return timeDifference <= 300; // 300 seconds is 5 minutes
+};