From 030bac87bd864520edfa4e1d393979617dca3a2a Mon Sep 17 00:00:00 2001
From: Christel Westerberg <christel.westerberg@scandichotels.com>
Date: Wed, 12 Jun 2024 14:39:02 +0200
Subject: [PATCH] fix: cache revalidation logic for language switcher

---
 app/api/web/revalidate/route.ts             |  9 +++++++++
 server/routers/contentstack/config/query.ts | 19 +++++++++++++++++++
 server/routers/contentstack/config/utils.ts |  1 +
 3 files changed, 29 insertions(+)
 create mode 100644 server/routers/contentstack/config/utils.ts

diff --git a/app/api/web/revalidate/route.ts b/app/api/web/revalidate/route.ts
index e6e34cf72..ca2b529a9 100644
--- a/app/api/web/revalidate/route.ts
+++ b/app/api/web/revalidate/route.ts
@@ -7,6 +7,7 @@ import { Lang } from "@/constants/languages"
 import { env } from "@/env/server"
 import { internalServerError } from "@/server/errors/next"
 import { affix as breadcrumbsAffix } from "@/server/routers/contentstack/breadcrumbs/utils"
+import { languageSwitcherAffix } from "@/server/routers/contentstack/config/utils"
 
 import {
   generateRefsResponseTag,
@@ -67,6 +68,11 @@ export async function POST(request: NextRequest) {
     const refsTag = generateRefsResponseTag(entry.locale, entry.uid)
     const refTag = generateRefTag(entry.locale, content_type.uid, entry.uid)
     const tag = generateTag(entry.locale, entry.uid)
+    const languageSwitcherTag = generateTag(
+      entry.locale,
+      entry.uid,
+      languageSwitcherAffix
+    )
 
     console.info(`Revalidating refsTag: ${refsTag}`)
     revalidateTag(refsTag)
@@ -77,6 +83,9 @@ export async function POST(request: NextRequest) {
     console.info(`Revalidating tag: ${tag}`)
     revalidateTag(tag)
 
+    console.info(`Revalidating language switcher tag: ${languageSwitcherTag}`)
+    revalidateTag(languageSwitcherTag)
+
     if (entry.breadcrumbs) {
       const breadcrumbsRefsTag = generateRefsResponseTag(
         entry.locale,
diff --git a/server/routers/contentstack/config/query.ts b/server/routers/contentstack/config/query.ts
index 56d78ac08..e99b7a3cc 100644
--- a/server/routers/contentstack/config/query.ts
+++ b/server/routers/contentstack/config/query.ts
@@ -39,6 +39,7 @@ import {
   validateHeaderConfigSchema,
   validateLanguageSwitcherData,
 } from "./output"
+import { languageSwitcherAffix } from "./utils"
 
 import {
   LanguageSwitcherData,
@@ -144,6 +145,18 @@ export const configQueryRouter = router({
   languageSwitcher: contentstackProcedure.query(async ({ ctx }) => {
     const variables = { uid: ctx.uid, locale: ctx.lang }
     let urls: LanguageSwitcherData
+
+    const tagsDaDeEn = [
+      generateTag(Lang.da, ctx.uid, languageSwitcherAffix),
+      generateTag(Lang.de, ctx.uid, languageSwitcherAffix),
+      generateTag(Lang.en, ctx.uid, languageSwitcherAffix),
+    ]
+    const tagsFiNoSv = [
+      generateTag(Lang.fi, ctx.uid, languageSwitcherAffix),
+      generateTag(Lang.no, ctx.uid, languageSwitcherAffix),
+      generateTag(Lang.sv, ctx.uid, languageSwitcherAffix),
+    ]
+
     switch (ctx.contentType) {
       case PageTypeEnum.accountPage:
         const accountPageRes = await batchRequest<LanguageSwitcherQueryDataRaw>(
@@ -151,10 +164,12 @@ export const configQueryRouter = router({
             {
               document: GetDaDeEnUrlsAccountPage,
               variables,
+              tags: tagsDaDeEn,
             },
             {
               document: GetFiNoSvUrlsAccountPage,
               variables,
+              tags: tagsFiNoSv,
             },
           ]
         )
@@ -184,10 +199,12 @@ export const configQueryRouter = router({
             {
               document: GetDaDeEnUrlsLoyaltyPage,
               variables,
+              tags: tagsDaDeEn,
             },
             {
               document: GetFiNoSvUrlsLoyaltyPage,
               variables,
+              tags: tagsFiNoSv,
             },
           ]
         )
@@ -222,10 +239,12 @@ export const configQueryRouter = router({
           {
             document: GetDaDeEnUrlsCurrentBlocksPage,
             variables,
+            tags: tagsDaDeEn,
           },
           {
             document: GetFiNoSvUrlsCurrentBlocksPage,
             variables,
+            tags: tagsFiNoSv,
           },
         ])
 
diff --git a/server/routers/contentstack/config/utils.ts b/server/routers/contentstack/config/utils.ts
new file mode 100644
index 000000000..8adaaa376
--- /dev/null
+++ b/server/routers/contentstack/config/utils.ts
@@ -0,0 +1 @@
+export const languageSwitcherAffix = "languageSwitcher"