1 files changed, 42 insertions, 0 deletions
diff --git a/packages/integrations/sitemap/src/utils/parse-i18n-url.ts b/packages/integrations/sitemap/src/utils/parse-i18n-url.ts
new file mode 100644
index 000000000..86221ca9d
--- /dev/null
+++ b/packages/integrations/sitemap/src/utils/parse-i18n-url.ts
@@ -0,0 +1,42 @@
+interface ParsedI18nUrl {
+	locale: string;
+	path: string;
+}
+
+// NOTE: The parameters have been schema-validated with Zod
+export function parseI18nUrl(
+	url: string,
+	defaultLocale: string,
+	locales: Record<string, string>,
+	base: string,
+): ParsedI18nUrl | undefined {
+	if (!url.startsWith(base)) {
+		return undefined;
+	}
+
+	let s = url.slice(base.length);
+
+	// Handle root URL
+	if (!s || s === '/') {
+		return { locale: defaultLocale, path: '/' };
+	}
+
+	if (s[0] !== '/') {
+		s = '/' + s;
+	}
+
+	// Get locale from path, e.g.
+	// "/en-US/" -> "en-US"
+	// "/en-US/foo" -> "en-US"
+	const locale = s.split('/')[1];
+	if (locale in locales) {
+		// "/en-US/foo" -> "/foo"
+		let path = s.slice(1 + locale.length);
+		if (!path) {
+			path = '/';
+		}
+		return { locale, path };
+	}
+
+	return { locale: defaultLocale, path: s };
+}