chore: refactor domain parsing to be more general (#3448)

* change the api of domain parsing to just parseDomain and getCookieDomain
* adds getBaseDomain as the method to get the domain after any official subdomains

app/components/Authenticated.tsx

@@ -2,7 +2,7 @@ import { observer } from "mobx-react";
 import * as React from "react";
 import { useTranslation } from "react-i18next";
 import { Redirect } from "react-router-dom";
-import { isCustomSubdomain } from "@shared/utils/domains";
+import { parseDomain } from "@shared/utils/domains";
 import LoadingIndicator from "~/components/LoadingIndicator";
 import env from "~/env";
 import useStores from "~/hooks/useStores";
@@ -40,9 +40,7 @@ const Authenticated = ({ children }: Props) => {
       }
     } else if (
       env.SUBDOMAINS_ENABLED &&
-      team.subdomain &&
-      isCustomSubdomain(hostname) &&
-      !hostname.startsWith(`${team.subdomain}.`)
+      parseDomain(hostname).teamSubdomain !== (team.subdomain ?? "")
     ) {
       window.location.href = `${team.url}${window.location.pathname}`;
       return <LoadingIndicator />;