[#31]added two function to setup data to be sent and put function

src/utils/timezone.ts

@@ -0,0 +1,38 @@
+// timezone.ts
+
+// Ensure ICAL is imported before using this module.
+import ICAL from "ical.js";
+
+// TIMEZONES data must be imported or defined separately.
+import { TIMEZONES } from "./timezone-data";
+
+// Core timezone registration functionality
+export function registerTimezones() {
+  for (const [key, data] of Object.entries(TIMEZONES.zones)) {
+    ICAL.TimezoneService.register(key, buildTimezone(key, data.ics));
+  }
+
+  for (const [key, data] of Object.entries(TIMEZONES.aliases)) {
+    ICAL.TimezoneService.register(key, findTimezone(data.aliasTo));
+  }
+}
+
+function buildTimezone(tzid: string, ics: string): any {
+  return (
+    ICAL.TimezoneService.get(tzid) ||
+    new ICAL.Timezone(new ICAL.Component(ICAL.parse(ics)))
+  );
+}
+
+function findTimezone(tzid: string): any {
+  if (TIMEZONES.zones[tzid]) {
+    return buildTimezone(tzid, TIMEZONES.zones[tzid].ics);
+  }
+
+  const alias = TIMEZONES.aliases[tzid];
+  if (alias && alias.aliasTo) {
+    return findTimezone(alias.aliasTo);
+  }
+
+  throw new Error(`Unknown timezone alias: ${tzid}`);
+}