Polish uploader UI and queue handling

clients/photobooth-uploader/PhotoboothUploader/Services/UploadService.cs

@@ -16,12 +16,17 @@ public sealed class UploadService
     private readonly ConcurrentDictionary<string, byte> _pending = new(StringComparer.OrdinalIgnoreCase);
     private CancellationTokenSource? _cts;
 
-    public void Start(PhotoboothSettings settings, Action<string> setStatus)
+    public void Start(
+        PhotoboothSettings settings,
+        Action<string> onQueued,
+        Action<string> onUploading,
+        Action<string> onSuccess,
+        Action<string> onFailure)
     {
         Stop();
 
         _cts = new CancellationTokenSource();
-        _ = Task.Run(() => WorkerAsync(settings, setStatus, _cts.Token));
+        _ = Task.Run(() => WorkerAsync(settings, onQueued, onUploading, onSuccess, onFailure, _cts.Token));
     }
 
     public void Stop()
@@ -31,7 +36,7 @@ public sealed class UploadService
         _pending.Clear();
     }
 
-    public void Enqueue(string path)
+    public void Enqueue(string path, Action<string> onQueued)
     {
         if (!_pending.TryAdd(path, 0))
         {
@@ -39,9 +44,16 @@ public sealed class UploadService
         }
 
         _queue.Writer.TryWrite(path);
+        onQueued(path);
     }
 
-    private async Task WorkerAsync(PhotoboothSettings settings, Action<string> setStatus, CancellationToken token)
+    private async Task WorkerAsync(
+        PhotoboothSettings settings,
+        Action<string> onQueued,
+        Action<string> onUploading,
+        Action<string> onSuccess,
+        Action<string> onFailure,
+        CancellationToken token)
     {
         if (string.IsNullOrWhiteSpace(settings.UploadUrl))
         {
@@ -56,9 +68,10 @@ public sealed class UploadService
             {
                 try
                 {
+                    onUploading(path);
                     await WaitForFileReadyAsync(path, token);
                     await UploadAsync(client, settings, path, token);
-                    setStatus($"Hochgeladen: {Path.GetFileName(path)}");
+                    onSuccess(path);
                 }
                 catch (OperationCanceledException)
                 {
@@ -66,7 +79,7 @@ public sealed class UploadService
                 }
                 catch
                 {
-                    setStatus($"Upload fehlgeschlagen: {Path.GetFileName(path)}");
+                    onFailure(path);
                 }
                 finally
                 {