Add uploader advanced settings and live status

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

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Concurrent;
+using System.Collections.Generic;
 using System.IO;
 using System.Net.Http;
 using System.Net.Http.Headers;
@@ -17,6 +18,7 @@ public sealed class UploadService
     private readonly ConcurrentDictionary<string, byte> _pending = new(StringComparer.OrdinalIgnoreCase);
     private string _userAgent = "FotospielPhotoboothUploader";
     private CancellationTokenSource? _cts;
+    private readonly List<Task> _workers = new();
 
     public void Configure(string userAgent)
     {
@@ -36,7 +38,11 @@ public sealed class UploadService
         Stop();
 
         _cts = new CancellationTokenSource();
-        _ = Task.Run(() => WorkerAsync(settings, onQueued, onUploading, onSuccess, onFailure, _cts.Token));
+        var workerCount = GetWorkerCount(settings);
+        for (var i = 0; i < workerCount; i++)
+        {
+            _workers.Add(Task.Run(() => WorkerAsync(settings, onQueued, onUploading, onSuccess, onFailure, _cts.Token)));
+        }
     }
 
     public void Stop()
@@ -44,6 +50,7 @@ public sealed class UploadService
         _cts?.Cancel();
         _cts = null;
         _pending.Clear();
+        _workers.Clear();
     }
 
     public void Enqueue(string path, Action<string> onQueued)
@@ -171,4 +178,15 @@ public sealed class UploadService
             _ => "image/jpeg",
         };
     }
+
+    private static int GetWorkerCount(PhotoboothSettings settings)
+    {
+        var count = settings.MaxConcurrentUploads;
+        if (count < 1)
+        {
+            return 1;
+        }
+
+        return count > 5 ? 5 : count;
+    }
 }