updated the pagelist middleware so it only returns english pagelinks …

…(#52342)

src/pagelist/middleware.ts

@@ -30,16 +30,20 @@ router.get('/v1/:product@:version', (req: ExtendedRequest, res: Response) => {
 
   // we filter the permalinks to get only our target version
   const filteredPermalinks = keys.filter((key) => versionMatcher(key, `${product}@${version}`))
+  const expression = /^\/en/
 
   if (!filteredPermalinks.length) {
     res.status(400).type('text').send('Invalid version')
     return
   }
 
+  //right now we only need english permalinks perhaps we can use the language from the request in the future
+  const englishPermalinks = filteredPermalinks.filter((permalink) => expression.test(permalink))
+
   defaultCacheControl(res)
 
   // new line added at the end so `wc` works as expected with `-l` and `-w`.
-  res.type('text').send(filteredPermalinks.join('\n').concat('\n'))
+  res.type('text').send(englishPermalinks.join('\n').concat('\n'))
 })
 
 router.get('/:product@:version', (req, res) => {

src/pagelist/tests/pagelist.ts

@@ -61,4 +61,14 @@ describe.each(allVersionKeys)('pagelist api for %s', async (versionKey) => {
         expect(permalink).toMatch(expression)
       })
   })
+
+  test('only returns urls that contain /en', async () => {
+    const expression = new RegExp(`^/en(/${nonEnterpriseDefaultVersion})?/?.*`)
+    res.body
+      .trim()
+      .split('\n')
+      .forEach((permalink: string) => {
+        expect(permalink).toMatch(expression)
+      })
+  })
 })