i18n

src/features/settings/server.ts

@@ -25,6 +25,32 @@ export const updateUserColorScheme = createServerFn({ method: "POST" })
     };
   });
 
+export const updateUserLocale = createServerFn({ method: "POST" })
+  .validator((data: string) => data)
+  .middleware([superTokensFunctionMiddleware, serverFnLoggingMiddleware])
+  .handler(async ({ context, data }) => {
+    const { userAuthId, metadata } = context;
+    if (!userAuthId) return;
+
+    const { SUPPORTED_LOCALES } = await import("@/lib/i18n");
+    if (!(SUPPORTED_LOCALES as readonly string[]).includes(data)) return;
+
+    const { updateUserMetadataFields } = await import(
+      "@/utils/supertokens-core.server"
+    );
+
+    await updateUserMetadataFields(userAuthId, {
+      locale: data,
+    });
+
+    return {
+      metadata: {
+        ...metadata,
+        locale: data,
+      },
+    };
+  });
+
 export const updateUserAccentColor = createServerFn({ method: "POST" })
   .validator((data: string) => data)
   .middleware([superTokensFunctionMiddleware, serverFnLoggingMiddleware])