Added list of users names in the dtr entry whenever lightfinder is active

LightlessSync/Services/BroadcastScanningService.cs

@@ -28,7 +28,7 @@ public class BroadcastScannerService : DisposableMediatorSubscriberBase, IDispos
     private readonly CancellationTokenSource _cleanupCts = new();
     private Task? _cleanupTask;
 
-    private int _checkEveryFrames = 20;
+    private readonly int _checkEveryFrames = 20;
     private int _frameCounter = 0;
     private int _lookupsThisFrame = 0;
     private const int MaxLookupsPerFrame = 30;
@@ -221,6 +221,16 @@ public class BroadcastScannerService : DisposableMediatorSubscriberBase, IDispos
             (excludeHashedCid is null || !comparer.Equals(entry.Key, excludeHashedCid)));
     }
 
+    public List<KeyValuePair<string, BroadcastEntry>> GetActiveBroadcasts(string? excludeHashedCid = null)
+    {
+        var now = DateTime.UtcNow;
+        var comparer = StringComparer.Ordinal;
+        return [.. _broadcastCache.Where(entry =>
+            entry.Value.IsBroadcasting &&
+            entry.Value.ExpiryTime > now &&
+            (excludeHashedCid is null || !comparer.Equals(entry.Key, excludeHashedCid)))];
+    }
+
     protected override void Dispose(bool disposing)
     {
         base.Dispose(disposing);