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fix: route localized URLs through Vercel rewrites #10

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Merged
mqmalagris merged 1 commit into from
May 1, 2026
Merged

fix: route localized URLs through Vercel rewrites #10

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19 changes: 16 additions & 3 deletions apps/web/src/layouts/Layout.astro
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,11 @@ interface Props {
noindex?: boolean;
}

// Astro.currentLocale tracks the language code matched by the URL even when the route is rewritten via fallback.
// Locale resolution order (Vercel rewrites lose the prefix from Astro's view,
// so we look in three places, top-priority first):
// 1. ?_locale= query param injected by the vercel.json rewrites
// 2. Astro.currentLocale — set when Astro's own i18n routing matches
// 3. URL prefix (covers local dev with the Astro server)
const CURRENT_TO_LOCALE: Record<string, Locale> = {
en: "en",
"pt-br": "pt-BR",
Expand All @@ -16,8 +20,17 @@ const CURRENT_TO_LOCALE: Record<string, Locale> = {
es: "es",
fr: "fr",
};
const cl = Astro.currentLocale;
const locale: Locale = (cl && CURRENT_TO_LOCALE[cl]) || "en";

function resolveLocale(): Locale {
const fromQuery = Astro.url.searchParams.get("_locale");
if (fromQuery && CURRENT_TO_LOCALE[fromQuery]) return CURRENT_TO_LOCALE[fromQuery];
const cl = Astro.currentLocale;
if (cl && CURRENT_TO_LOCALE[cl]) return CURRENT_TO_LOCALE[cl];
const seg = Astro.url.pathname.split("/").filter(Boolean)[0]?.toLowerCase();
if (seg && CURRENT_TO_LOCALE[seg]) return CURRENT_TO_LOCALE[seg];
return "en";
}
const locale = resolveLocale();
setLocale(locale);

const {
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11 changes: 11 additions & 0 deletions apps/web/vercel.json
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Original file line number Diff line number Diff line change
@@ -1,4 +1,15 @@
{
"rewrites": [
{ "source": "/pt-br", "destination": "/?_locale=pt-BR" },
{ "source": "/pt-br/", "destination": "/?_locale=pt-BR" },
{ "source": "/pt-br/:path*", "destination": "/:path*?_locale=pt-BR" },
{ "source": "/es", "destination": "/?_locale=es" },
{ "source": "/es/", "destination": "/?_locale=es" },
{ "source": "/es/:path*", "destination": "/:path*?_locale=es" },
{ "source": "/fr", "destination": "/?_locale=fr" },
{ "source": "/fr/", "destination": "/?_locale=fr" },
{ "source": "/fr/:path*", "destination": "/:path*?_locale=fr" }
],
"headers": [
{
"source": "/(.*)",
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