several fixes for file cache handling, add account deletion

MareSynchronos/Managers/CharacterCacheManager.cs

@@ -41,6 +41,7 @@ public class CharacterCacheManager : IDisposable
 
     public void AddInitialPairs(List<string> apiTaskResult)
     {
+        _onlineCachedPlayers.Clear();
         _onlineCachedPlayers.AddRange(apiTaskResult.Select(a => new CachedPlayer(a)));
         Logger.Debug("Online and paired users: " + string.Join(",", _onlineCachedPlayers));
     }
@@ -159,6 +160,7 @@ public class CharacterCacheManager : IDisposable
     private void ApiControllerOnPairedClientOnline(object? sender, EventArgs e)
     {
         Logger.Debug("Player online: " + sender!);
+        if (_onlineCachedPlayers.Any(c => c.PlayerNameHash == (string)sender!)) return;
         _onlineCachedPlayers.Add(new CachedPlayer((string)sender!));
     }
 

MareSynchronos/Managers/FileCacheManager.cs

@@ -317,9 +317,15 @@ namespace MareSynchronos.Managers
                 Logger.Debug("Found " + fileCachesToAdd.Count + " additions and " + fileCachesToDelete.Count + " deletions");
                 try
                 {
-                    db.FileCaches.RemoveRange(fileCachesToDelete);
+                    foreach (var deletion in fileCachesToDelete)
+                    {
+                        var entry = db.FileCaches.SingleOrDefault(f =>
+                            f.Hash == deletion.Hash && f.Filepath == deletion.Filepath);
+                        if (entry != null)
+                            db.FileCaches.Remove(entry);
+                    }
                     db.FileCaches.AddRange(fileCachesToAdd);
-                    db.SaveChanges();
+                    await db.SaveChangesAsync(ct);
                 }
                 catch (Exception ex)
                 {