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Add ?country= deep link to select the benchmark view #57

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Merged
MaxGhenis merged 1 commit into from
Jun 3, 2026
Merged

Add ?country= deep link to select the benchmark view #57

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31 changes: 28 additions & 3 deletions app/src/App.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,19 @@ function detectVisitorCountry(availableViews: readonly CountryCode[]): CountryCo
return availableViews.includes("us") ? "us" : (availableViews[0] ?? "us");
}

/** Explicit country override from the URL, e.g. ?country=uk or ?view=us. */
function countryFromQuery(
availableViews: readonly CountryCode[],
): CountryCode | null {
if (typeof window === "undefined") return null;
const params = new URLSearchParams(window.location.search);
const raw = (params.get("country") ?? params.get("view") ?? "").toLowerCase();
if ((raw === "uk" || raw === "us") && availableViews.includes(raw as CountryCode)) {
return raw as CountryCode;
}
return null;
}

export default function App() {
const availableViews = useMemo(() => getAvailableViews(dashboard), []);
// Default to the US benchmark, then switch UK visitors after mount when
Expand All @@ -76,9 +89,15 @@ export default function App() {

useEffect(() => {
if (hasUserPickedView) return;
const detected = detectVisitorCountry(availableViews);
if (detected !== selectedView) {
setSelectedView(detected);
// An explicit ?country= override wins and locks the view; otherwise fall
// back to timezone/language auto-detection.
const fromUrl = countryFromQuery(availableViews);
const next = fromUrl ?? detectVisitorCountry(availableViews);
if (next !== selectedView) {
setSelectedView(next);
}
if (fromUrl) {
setHasUserPickedView(true);
}
// We only want this auto-pick to run once per session; further changes
// come from the user clicking the country selector.
Expand Down Expand Up @@ -127,6 +146,12 @@ export default function App() {
setSelectedView(view);
setHasUserPickedView(true);
setActiveNav("models");
// Keep the URL in sync so the current view is shareable/embeddable.
if (typeof window !== "undefined") {
const url = new URL(window.location.href);
url.searchParams.set("country", view);
window.history.replaceState(null, "", url);
}
};

useEffect(() => {
Expand Down