[APP-549] Language controls for Whats Hot (#563)

* Add a content-language preference control

* Update whats hot to only show the selected languages and to refresh on lang pref changes

* Fix lint

* Fix tests

* Add missing accessibility role

1 files changed, 4 insertions, 6 deletions

diff --git a/src/lib/api/feed-manip.ts b/src/lib/api/feed-manip.ts
index 60e755048..96534d1ba 100644
--- a/src/lib/api/feed-manip.ts
+++ b/src/lib/api/feed-manip.ts
@@ -202,7 +202,9 @@ export class FeedTuner {
       tuner: FeedTuner,
       slices: FeedViewPostsSlice[],
     ): FeedViewPostsSlice[] => {
-      const origSlices = slices.concat()
+      if (!langsCode2.length) {
+        return slices
+      }
       for (let i = slices.length - 1; i >= 0; i--) {
         let hasPreferredLang = false
         for (const item of slices[i].items) {
@@ -236,11 +238,7 @@ export class FeedTuner {
           slices.splice(i, 1)
         }
       }
-      if (slices.length) {
-        return slices
-      }
-      // fallback: give everything if the language filter left nothing
-      return origSlices
+      return slices
     }
   }
 }