remove unnecessary code

src/helpers/event/recurringEventHelpers/generateRecurrenceRuleString.ts

@@ -1,14 +1,13 @@
-import { format } from "date-fns";
 import type { RecurrenceRuleInput } from "../../../types/generatedGraphQLTypes";
-import { adjustForTimezoneOffset } from "../../../utilities/recurrenceDatesUtil";
+import { convertToRRuleDateString } from "../../../utilities/recurrenceDatesUtil";
 
 /**
  * This function generates the recurrence rule (rrule) string.
  * @param recurrenceRuleData - the recurrenceRuleInput provided in the args.
  * @param recurrenceStartDate - start date of recurrence.
  * @param recurrenceEndDate - end date of recurrence.
  * @remarks The following steps are followed:
- * 1. Adjust the start and end dates of recurrence for timezone offsets.
+ * 1. Get the date strings for start and end of recurrence.
  * 2. Get the recurrence rules and make a recurrenceRuleString.
  * @returns The recurrence rule string that would be used to create a valid rrule object.
  */
@@ -18,52 +17,34 @@ export const generateRecurrenceRuleString = (
   recurrenceStartDate: Date,
   recurrenceEndDate?: Date
 ): string => {
-  // adjust the dates according to the timezone offset
-  recurrenceStartDate = adjustForTimezoneOffset(recurrenceStartDate);
+  // get the start date string for rrule's "DTSTART" property
+  const recurrenceStartDateString =
+    convertToRRuleDateString(recurrenceStartDate);
+
+  // get the end date string for rrule's "UNTIL" property
+  let recurrenceEndDateString = "";
   if (recurrenceEndDate) {
-    recurrenceEndDate = adjustForTimezoneOffset(recurrenceEndDate);
+    recurrenceEndDateString = convertToRRuleDateString(recurrenceEndDate);
   }
 
-  // recurrence start date
-  // (not necessarily the start date of the first recurring instance)
-  let formattedRecurrenceStartDate = format(
-    recurrenceStartDate,
-    "yyyyMMdd'T'HHmmss'Z'"
-  );
-
-  // format it to be UTC midnight
-  formattedRecurrenceStartDate = formattedRecurrenceStartDate.replace(
-    /T\d{6}Z/,
-    "T000000Z"
-  );
-
-  // date upto which instances would be generated
-  let formattedRecurrenceEndDate = recurrenceEndDate
-    ? format(recurrenceEndDate, "yyyyMMdd'T'HHmmss'Z'")
-    : "";
-
-  // format it to be UTC midnight
-  formattedRecurrenceEndDate = formattedRecurrenceEndDate.replace(
-    /T\d{6}Z/,
-    "T000000Z"
-  );
-
   // destructure the recurrence rules
   const { frequency, count, weekDays } = recurrenceRuleData;
 
   // string representing the days of the week the event would recur
   const weekDaysString = weekDays?.length ? weekDays.join(",") : "";
 
   // initiate recurrence rule string
-  let recurrenceRuleString = `DTSTART:${formattedRecurrenceStartDate}\nRRULE:FREQ=${frequency}`;
+  let recurrenceRuleString = `DTSTART:${recurrenceStartDateString}\nRRULE:FREQ=${frequency}`;
 
-  if (formattedRecurrenceEndDate) {
-    recurrenceRuleString += `;UNTIL=${formattedRecurrenceEndDate}`;
+  if (recurrenceEndDateString) {
+    recurrenceRuleString += `;UNTIL=${recurrenceEndDateString}`;
   }
+
   if (count) {
     // maximum number of instances to create
     recurrenceRuleString += `;COUNT=${count}`;
   }
+
   if (weekDaysString) {
     recurrenceRuleString += `;BYDAY=${weekDaysString}`;
   }

src/utilities/recurrenceDatesUtil.ts

@@ -16,18 +16,17 @@ export const convertToUTCDate = (date: Date): Date => {
 };
 
 /**
- * This function adjusts for the timezone offset.
- * @param date - the date to be adjusted.
- * @returns adjusted date.
+ * This function converts the date to a valid rrule string argument.
+ * @param date - the date string to be converted.
+ * @returns converted date string.
  */
-export const adjustForTimezoneOffset = (date: Date): Date => {
-  const timeZoneOffset = new Date().getTimezoneOffset();
 
-  /* c8 ignore start */
-  if (timeZoneOffset > 0) {
-    date = new Date(date.getTime() + timeZoneOffset * 60 * 1000);
-  }
+export const convertToRRuleDateString = (date: Date): string => {
+  let dateString = date.toISOString();
 
-  /* c8 ignore stop */
-  return date;
+  dateString = dateString.replace(/[-:]/g, "");
+
+  dateString = dateString.replace(/\.\d{3}/, "");
+
+  return dateString;
 };