More organized communication strategy.

Gameboard.ShogiUI.Sockets/Models/Session.cs

@@ -0,0 +1,68 @@
+using Gameboard.ShogiUI.Sockets.Extensions;
+using Gameboard.ShogiUI.Sockets.ServiceModels.Socket.Types;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Net.WebSockets;
+using System.Threading.Tasks;
+
+namespace Gameboard.ShogiUI.Sockets.Models
+{
+  public class Session
+  {
+    public string Name { get; }
+    public string Player1 { get; }
+    public string Player2 { get; }
+
+    public ConcurrentDictionary<string, WebSocket> Subscriptions { get; }
+
+    public Session(Shogi.Api.ServiceModels.Types.Session session)
+    {
+      Name = session.Name;
+      Player1 = session.Player1;
+      Player2 = session.Player2;
+      Subscriptions = new ConcurrentDictionary<string, WebSocket>();
+    }
+
+    public bool Subscribe(string playerName, WebSocket socket) => Subscriptions.TryAdd(playerName, socket);
+
+    public Task Broadcast(string message)
+    {
+      var tasks = new List<Task>(Subscriptions.Count);
+      foreach (var kvp in Subscriptions)
+      {
+        var socket = kvp.Value;
+        tasks.Add(socket.SendTextAsync(message));
+      }
+      return Task.WhenAll(tasks);
+    }
+
+    public Task SendToPlayer1(string message)
+    {
+      if (Subscriptions.TryGetValue(Player1, out var socket))
+      {
+        return socket.SendTextAsync(message);
+      }
+      return Task.CompletedTask;
+    }
+
+    public Task SendToPlayer2(string message)
+    {
+      if (Subscriptions.TryGetValue(Player2, out var socket))
+      {
+        return socket.SendTextAsync(message);
+      }
+      return Task.CompletedTask;
+    }
+
+    public Game ToServiceModel()
+    {
+      var players = new List<string>(2) { Player1 };
+      if (!string.IsNullOrWhiteSpace(Player2)) players.Add(Player2);
+      return new Game
+      {
+        GameName = Name,
+        Players = players.ToArray()
+      };
+    }
+  }
+}