Language filter chips on the videos feed

Adds one chip per language currently present in public content —
counting both primary language and any secondary audio track, sorted
by video count, capped at 12. Clicking a chip lists every video whose
primary is that language or that has a matching secondary track; cards
surfaced only via a secondary track link straight to /videos/{key}?track=<id>
so the pinned playback wiring loads the right audio, get a small flag
badge on the thumbnail, and their hover-preview streams the track file
instead of the primary.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>

app/Http/Controllers/VideoController.php

@@ -33,6 +33,46 @@ class VideoController extends Controller
     {
         $filter = request('filter', 'all');
 
+        // Chips: distinct languages that actually appear in public content —
+        // either as a video's primary language or as any of its audio tracks.
+        // Sorted by video count so the most-used languages come first, capped
+        // at 12 so the bar doesn't overflow.
+        $langChips = $this->buildLanguageChips();
+
+        // ── Filter by language (?filter=lang:xx) ──────────────────
+        // Matches when the video's primary language is xx OR when any of
+        // its secondary audio tracks is xx. When a card is being shown only
+        // because of a secondary track, we tag it so video-card can link
+        // straight to that track via ?track=ID and badge it with the flag.
+        if (str_starts_with((string) $filter, 'lang:')) {
+            $lang = strtolower(substr($filter, 5));
+            $primaryIds  = \App\Models\Video::public()->where('language', $lang)->pluck('id');
+            $secondaryTracks = \App\Models\VideoAudioTrack::where('language', $lang)
+                ->whereIn('video_id', \App\Models\Video::public()->pluck('id'))
+                ->get();
+            $secondaryVideoIds = $secondaryTracks->pluck('video_id')->unique();
+            // If the video is already primary-matched, no track override.
+            // Otherwise pin the surfaced track.
+            $trackByVideo = $secondaryTracks
+                ->filter(fn ($t) => ! $primaryIds->contains($t->video_id))
+                ->keyBy('video_id');
+
+            $ids = $primaryIds->concat($secondaryVideoIds)->unique()->values();
+            $videos = \App\Models\Video::public()->whereIn('id', $ids)
+                ->latest()->limit(60)->get();
+
+            foreach ($videos as $v) {
+                if ($trackByVideo->has($v->id)) {
+                    $v->setAttribute('_force_track_id', $trackByVideo[$v->id]->id);
+                    $v->setAttribute('_force_track_flag', \App\Data\Languages::flag($lang));
+                }
+            }
+
+            return view('videos.index', compact('videos', 'filter', 'langChips') + [
+                'shorts' => collect(), 'matches' => collect(), 'playlists' => collect(),
+            ]);
+        }
+
         // ── Playlists-only browse ──────────────────────────────────
         if ($filter === 'playlists') {
             $playlists = Playlist::where('visibility', 'public')
@@ -41,7 +81,7 @@ class VideoController extends Controller
                 ->latest()
                 ->limit(60)
                 ->get();
-            return view('videos.index', compact('playlists', 'filter') + [
+            return view('videos.index', compact('playlists', 'filter', 'langChips') + [
                 'videos' => collect(), 'shorts' => collect(), 'matches' => collect(),
             ]);
         }
@@ -49,7 +89,7 @@ class VideoController extends Controller
         // ── Shorts-only browse ────────────────────────────────────
         if ($filter === 'shorts') {
             $videos = Video::public()->shorts()->latest()->limit(60)->get();
-            return view('videos.index', compact('videos', 'filter') + [
+            return view('videos.index', compact('videos', 'filter', 'langChips') + [
                 'shorts' => collect(), 'matches' => collect(), 'playlists' => collect(),
             ]);
         }
@@ -57,7 +97,7 @@ class VideoController extends Controller
         // ── Sports/Matches-only browse ────────────────────────────
         if ($filter === 'match') {
             $videos = Video::public()->where('type', 'match')->notShorts()->latest()->limit(60)->get();
-            return view('videos.index', compact('videos', 'filter') + [
+            return view('videos.index', compact('videos', 'filter', 'langChips') + [
                 'shorts' => collect(), 'matches' => collect(), 'playlists' => collect(),
             ]);
         }
@@ -68,7 +108,7 @@ class VideoController extends Controller
             if ($filter === 'music') $query->where('type', 'music');
             else $query->latest();
             $videos = $query->limit(50)->get();
-            return view('videos.index', compact('videos', 'filter') + [
+            return view('videos.index', compact('videos', 'filter', 'langChips') + [
                 'shorts' => collect(), 'matches' => collect(), 'playlists' => collect(),
             ]);
         }
@@ -91,11 +131,58 @@ class VideoController extends Controller
             ->sortByDesc('date')
             ->values();
 
-        return view('videos.index', compact('feedItems', 'filter') + [
+        return view('videos.index', compact('feedItems', 'filter', 'langChips') + [
             'videos' => collect(), 'shorts' => collect(), 'matches' => collect(), 'playlists' => collect(),
         ]);
     }
 
+    /**
+     * Distinct languages currently present in public content, sorted by how
+     * many videos each covers (primary + secondary tracks combined). Returned
+     * as [ ['code'=>'ja','flag'=>'jp','name'=>'Japanese','count'=>N], ... ]
+     */
+    protected function buildLanguageChips(int $limit = 12): array
+    {
+        $publicIds = \App\Models\Video::public()->pluck('id');
+        if ($publicIds->isEmpty()) return [];
+
+        // Video-per-language: union of primary language and each track's
+        // language, deduplicated per video so a video with EN primary + EN
+        // extra doesn't inflate the EN count.
+        $primary = \App\Models\Video::public()
+            ->whereNotNull('language')->where('language', '!=', '')
+            ->pluck('language', 'id');
+        $tracks = \App\Models\VideoAudioTrack::whereIn('video_id', $publicIds)
+            ->whereNotNull('language')->where('language', '!=', '')
+            ->get(['video_id', 'language']);
+
+        $langsPerVideo = [];
+        foreach ($primary as $vid => $lang) {
+            $langsPerVideo[$vid][strtolower($lang)] = true;
+        }
+        foreach ($tracks as $t) {
+            $langsPerVideo[$t->video_id][strtolower($t->language)] = true;
+        }
+
+        $counts = [];
+        foreach ($langsPerVideo as $langs) {
+            foreach (array_keys($langs) as $code) {
+                $counts[$code] = ($counts[$code] ?? 0) + 1;
+            }
+        }
+        arsort($counts);
+
+        $chips = [];
+        foreach ($counts as $code => $count) {
+            $flag = \App\Data\Languages::flag($code);
+            if (! $flag) continue; // skip unknown codes
+            $name = \App\Data\Languages::all()[$code]['name'] ?? strtoupper($code);
+            $chips[] = ['code' => $code, 'flag' => $flag, 'name' => $name, 'count' => $count];
+            if (count($chips) >= $limit) break;
+        }
+        return $chips;
+    }
+
     public function search(Request $request)
     {
         $query = $request->get('q', '');