Function NextFlow

packages/onboarding-demo/src/next-flow.tsx:81–304

()

});

export function NextFlow() {
  const [added, setAdded] = useState<readonly Added[]>([]);
  const [route, setRoute] = useState<NextRoute>(() => parseRoute(globalThis.location?.hash ?? ""));

  useEffect(() => {
    const onHashChange = () => setRoute(parseRoute(globalThis.location?.hash ?? ""));
    globalThis.addEventListener("hashchange", onHashChange);
    return () => globalThis.removeEventListener("hashchange", onHashChange);
  }, []);

  const go = useCallback((next: NextRoute) => {
    setRoute(next);
    if (globalThis.location) globalThis.location.hash = routeToHash(next);
  }, []);

  const addIntegration = useCallback((item: AddedIntegration) => {
    setAdded((previous) =>
      previous.some((entry) => entry.item.domain === item.domain)
        ? previous
        : [
            ...previous,
            // An add always leaves exactly one account behind, already named
            // and in the one state that matters.
            { item, accounts: [{ label: "default", status: "needs-auth" as const }] },
          ],
    );
  }, []);

  const addFromCatalog = useCallback(
    (item: CatalogItem) => addIntegration(fromCatalogItem(item)),
    [addIntegration],
  );

  const markConnected = useCallback((domain: string, accountLabel: string, identity: string) => {
    setAdded((previous) =>
      previous.map((entry) =>
        entry.item.domain === domain
          ? {
              ...entry,
              accounts: entry.accounts.map((account) =>
                account.label === accountLabel
                  ? { ...account, status: "connected" as const, identity }
                  : account,
              ),
            }
          : entry,
      ),
    );
  }, []);

  const activeDomain = route.kind === "detail" || route.kind === "auth" ? route.domain : null;
  const open = added.find((entry) => entry.item.domain === activeDomain) ?? null;
  const pendingCount = added.filter((entry) =>
    entry.accounts.some((account) => account.status === "needs-auth"),
  ).length;

  // A deep link can name a domain that has not been added in this session.
  // Say so rather than rendering an empty detail screen.