Merged in feat/sw-2333-package-and-sas-i18n (pull request #2538)

feat(SW-2333): I18n for multiple apps and packages

* Set upp i18n in partner-sas

* Adapt lokalise workflow to monorepo

* Fix layout props


Approved-by: Linus Flood

apps/partner-sas/i18n/serverContext.ts

@@ -0,0 +1,34 @@
+import "server-only"
+
+import { headers } from "next/headers"
+import { cache } from "react"
+
+import { Lang } from "@scandic-hotels/common/constants/language"
+import { languageSchema } from "@scandic-hotels/common/utils/languages"
+
+const getRef = cache(() => ({ current: undefined as Lang | undefined }))
+
+/**
+ * Set the language for the current request
+ *
+ * It works kind of like React's context,
+ * but on the server side, per request.
+ *
+ * @param newLang
+ */
+export function setLang(newLang: Lang) {
+  const parseResult = languageSchema.safeParse(newLang)
+  getRef().current = parseResult.success ? parseResult.data : Lang.en
+}
+
+/**
+ * Get the global language set for the current request
+ */
+export async function getLang(): Promise<Lang> {
+  const contextLang = getRef().current
+  const headersList = await headers()
+  const headerLang = headersList.get("x-lang") as Lang
+
+  const l = contextLang || headerLang || Lang.en
+  return l
+}