fix: excel parsing

packages/utils/src/date-utils/isTimeString.test.ts

@@ -1,4 +1,4 @@
-import { isTimeString } from './isTimeString';
+import { isISO8601, isTimeString } from './isTimeString';
 
 describe('test isTimeString() function', () => {
   it('it validates time strings', () => {
@@ -33,3 +33,16 @@ describe('test isTimeString() function handle AM/PM', () => {
     });
   }
 });
+
+describe('isISO8601()', () => {
+  it('returns true for valid ISO 8601 date-time strings', () => {
+    expect(isISO8601('1899-12-30T08:30:00.000Z')).toBe(true);
+    expect(isISO8601('2022-01-01T00:00:00.000Z')).toBe(true);
+  });
+
+  it('returns false for invalid ISO 8601 date-time strings', () => {
+    expect(isISO8601('not a date')).toBe(false);
+    expect(isISO8601('1899-12-30T08:30:00Z')).toBe(false); // missing milliseconds
+    expect(isISO8601('1899-12-30 08:30:00.000Z')).toBe(false); // space instead of 'T'
+  });
+});

packages/utils/src/date-utils/isTimeString.ts

@@ -1,9 +1,15 @@
 /**
  * @description Validates a time string
- * @param {string} text - time string "23:00:12"
- * @returns {boolean} string represents time
  */
-export const isTimeString = (text: string): boolean => {
+export function isTimeString(text: string): boolean {
   const regex = /^(?:(?:([01]?\d|2[0-3])[:,.])?([0-5]?\d)[:,.])?([0-5]?\d)?(\s)?([APap][Mm])?$/;
   return regex.test(text);
-};
+}
+
+/**
+ * @description Validates a ISO8601 date-time string
+ */
+export function isISO8601(text: string): boolean {
+  const regex = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$/;
+  return regex.test(text);
+}