fix: resolve bug with missing file

app/Http/Controllers/DownloadController.php

@@ -5,23 +5,35 @@
 namespace App\Http\Controllers;
 
 use App\Models\Torrent;
-use Illuminate\Contracts\Filesystem\Factory as FilesystemFactory;
+use Illuminate\Container\Attributes\Storage;
+use Illuminate\Filesystem\FilesystemAdapter;
 use Illuminate\Http\Request;
+use Psr\Log\LoggerInterface;
 use Symfony\Component\HttpFoundation\StreamedResponse;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 readonly class DownloadController
 {
     public function __construct(
-        private FilesystemFactory $filesystem,
+        #[Storage('torrents')] private FilesystemAdapter $disk,
+        private LoggerInterface $logger,
     ) {}
 
     public function __invoke(Request $request, Torrent $torrent): StreamedResponse
     {
+        $path = "{$torrent->hash}.torrent";
+
+        if (! $this->disk->exists($path)) {
+            // A row without its cached file means the disk has drifted from the
+            // database, which is worth knowing about even though the visitor
+            // only ever sees a missing torrent.
+            $this->logger->error('Cached torrent file is missing.', ['hash' => $torrent->hash]);
+
+            throw new NotFoundHttpException;
+        }
+
         $torrent->increment('downloads');
 
-        // Read through the same disk the upload wrote to, so the two cannot
-        // drift apart the way a hardcoded storage path did.
-        return $this->filesystem->disk('torrents')
-            ->download("{$torrent->hash}.torrent");
+        return $this->disk->download($path);
     }
 }