Login:Src:Utils: add functions for timezone

packages/login/src/utils/index.ts

@@ -28,6 +28,10 @@ import { thirdPartyLogin } from "@docspace/shared/utils/loginUtils";
 import { Nullable, TTranslation } from "@docspace/shared/types";
 
 import { MessageKey } from "./enums";
+import { TTimeZone } from "@docspace/shared/api/settings/types";
+import { TTimeZoneOption } from "@/types";
+
+import { findWindows } from "windows-iana";
 
 export async function oAuthLogin(profile: string) {
   let isSuccess = false;
@@ -138,3 +142,35 @@ export const getEmailFromInvitation = (encodeString: Nullable<string>) => {
 
   return queryParams.email;
 };
+
+export const mapTimezonesToArray = (
+  timezones: TTimeZone[],
+): TTimeZoneOption[] => {
+  return timezones.map((timezone) => {
+    return { key: timezone.id, label: timezone.displayName };
+  });
+};
+
+export const getUserTimezone = (): string => {
+  return Intl.DateTimeFormat().resolvedOptions().timeZone || "UTC";
+};
+
+export const getSelectZone = (
+  zones: TTimeZoneOption[],
+  userTimezone: string,
+) => {
+  const defaultTimezone = "UTC";
+  const isWindowsZones = zones[0].key === "Dateline Standard Time"; //TODO: get from server
+
+  if (isWindowsZones) {
+    const windowsZoneKey = findWindows(userTimezone);
+    return (
+      zones.filter((zone) => zone.key === windowsZoneKey[0]) ||
+      zones.filter((zone) => zone.key === defaultTimezone)
+    );
+  }
+  return (
+    zones.filter((zone) => zone.key === userTimezone) ||
+    zones.filter((zone) => zone.key === defaultTimezone)
+  );
+};