fix(admin): ignore missing managed audio files

allstarr.Tests/Api/AdminUiStorageCountTests.cs

@@ -0,0 +1,40 @@
+using allstarr.Controllers;
+
+namespace allstarr.Tests;
+
+public sealed class AdminUiStorageCountTests
+{
+    [Fact]
+    public void ExistingStorageMappings_ExcludeMissingAndOutsideFiles()
+    {
+        var testRoot = Path.Combine(Path.GetTempPath(), $"allstarr-home-storage-{Guid.NewGuid():N}");
+        var downloadRoot = Path.Combine(testRoot, "downloads");
+        var paths = new[]
+        {
+            Path.Combine(downloadRoot, "cache", "cached.mp3"),
+            Path.Combine(downloadRoot, "transcoded", "transcoded.m4a"),
+            Path.Combine(downloadRoot, "permanent", "permanent.flac"),
+            Path.Combine(downloadRoot, "kept", "legacy.ogg"),
+            Path.Combine(downloadRoot, "cache", "missing.mp3"),
+            Path.Combine(testRoot, "outside.mp3")
+        };
+
+        try
+        {
+            foreach (var path in paths.Where(path => !path.EndsWith("missing.mp3", StringComparison.Ordinal)))
+            {
+                Directory.CreateDirectory(Path.GetDirectoryName(path)!);
+                File.WriteAllText(path, "fixture");
+            }
+
+            var counts = AdminUiController.CountExistingStorageMappings(paths, downloadRoot);
+
+            Assert.Equal(2, counts.CacheTracks);
+            Assert.Equal(2, counts.KeptTracks);
+        }
+        finally
+        {
+            if (Directory.Exists(testRoot)) Directory.Delete(testRoot, recursive: true);
+        }
+    }
+}

allstarr/Controllers/AdminUiController.cs

@@ -275,10 +275,7 @@ public class AdminUiController : ControllerBase
             var paths = await context.DownloadedSongMappings.AsNoTracking()
                 .Select(item => item.LocalPath)
                 .ToArrayAsync(cancellationToken);
-            cacheTracks = paths.Count(path => IsStoredUnder(path, Path.Combine(downloadRoot, "cache")) ||
-                                              IsStoredUnder(path, Path.Combine(downloadRoot, "transcoded")));
-            keptTracks = paths.Count(path => IsStoredUnder(path, Path.Combine(downloadRoot, "permanent")) ||
-                                             IsStoredUnder(path, Path.Combine(downloadRoot, "kept")));
+            (cacheTracks, keptTracks) = CountExistingStorageMappings(paths, downloadRoot);
         }
         var storage = services.GetService<DurableStorageState>()?.GetSnapshot();
         var providerHealth = session.IsAdministrator
@@ -336,6 +333,29 @@ public class AdminUiController : ControllerBase
         }
     }
 
+    internal static (int CacheTracks, int KeptTracks) CountExistingStorageMappings(
+        IEnumerable<string> paths,
+        string downloadRoot)
+    {
+        var cacheTracks = 0;
+        var keptTracks = 0;
+        foreach (var path in paths)
+        {
+            if (!System.IO.File.Exists(path)) continue;
+            if (IsStoredUnder(path, Path.Combine(downloadRoot, "cache")) ||
+                IsStoredUnder(path, Path.Combine(downloadRoot, "transcoded")))
+            {
+                cacheTracks++;
+            }
+            else if (IsStoredUnder(path, Path.Combine(downloadRoot, "permanent")) ||
+                     IsStoredUnder(path, Path.Combine(downloadRoot, "kept")))
+            {
+                keptTracks++;
+            }
+        }
+        return (cacheTracks, keptTracks);
+    }
+
     [HttpGet("activity")]
     public async Task<IActionResult> GetDashboardActivity(
         [FromQuery] int limit = 20,