Merged in feat/SW-3639-autologin-sas (pull request #3245)

Feat/SW-3639 autologin sas

* wip

* cleanup

* remove commented code and default lang to EN


Approved-by: Anton Gunnarsson

apps/partner-sas/app/[lang]/SessionRefresher.tsx

@@ -1,12 +1,57 @@
 "use client"
 
-import { signOut, useSession } from "next-auth/react"
+import { signIn, signOut, useSession } from "next-auth/react"
+import { useEffect, useState } from "react"
+import { useLocalStorage } from "usehooks-ts"
 
 export function SessionRefresher() {
-  const session = useSession()
-  if (session.data?.error === "RefreshAccessTokenError") {
-    signOut({ redirect: false })
-  }
+  useSilentAuth()
+  useHandleRefreshError()
 
   return null
 }
+
+function useHandleRefreshError() {
+  const session = useSession()
+
+  if (session.data?.error === "RefreshAccessTokenError") {
+    signOut({ redirect: false })
+  }
+}
+
+const SILENT_AUTH_KEY = "silent-auth"
+const SILENT_AUTH_EXPIRY = 6 * 60 * 1000 // 6 hours
+
+function useSilentAuth() {
+  const { status } = useSession()
+  const [silentAuthTimestamp, setSilentAuthTimestamp] = useLocalStorage<
+    string | undefined
+  >(SILENT_AUTH_KEY, undefined)
+  const [isLoading, setLoading] = useState(() => status === "unauthenticated")
+
+  const hasCompletedSilentSignin =
+    !!silentAuthTimestamp &&
+    Date.now() - Number(silentAuthTimestamp) < SILENT_AUTH_EXPIRY
+
+  useEffect(() => {
+    if (status !== "unauthenticated") return
+    if (hasCompletedSilentSignin) return
+
+    setLoading(true)
+
+    try {
+      signIn(
+        "sas",
+        {},
+        {
+          prompt: "none",
+        }
+      )
+    } finally {
+      setSilentAuthTimestamp(Date.now().toString())
+      setLoading(false)
+    }
+  }, [hasCompletedSilentSignin, setSilentAuthTimestamp, status])
+
+  return { isLoading: status !== "authenticated" && isLoading }
+}