was added firebase nitifying

Govor.API/Hubs/Infrastructure/ConnectionStore.cs

@@ -0,0 +1,32 @@
+using System.Collections.Concurrent;
+using Govor.Application.Interfaces;
+
+namespace Govor.API.Hubs.Infrastructure;
+
+public class ConnectionStore : IConnectionStore
+{
+    private readonly ConcurrentDictionary<Guid, HashSet<string>> _connections = new();
+
+    public void AddConnection(Guid userId, string connectionId)
+    {
+        var conns = _connections.GetOrAdd(userId, _ => new HashSet<string>());
+        lock (conns) conns.Add(connectionId);
+    }
+
+    public void RemoveConnection(Guid userId, string connectionId)
+    {
+        if (_connections.TryGetValue(userId, out var conns))
+        {
+            lock (conns)
+            {
+                conns.Remove(connectionId);
+                if (!conns.Any()) _connections.TryRemove(userId, out _);
+            }
+        }
+    }
+
+    public IEnumerable<string> GetConnections(Guid userId)
+    {
+        return _connections.TryGetValue(userId, out var conns) ? conns.ToList() : Enumerable.Empty<string>();
+    }
+}