baseline: OpenMU upstream b5a0961 (fresh source)

src/ChatServer/ChatRoomManager.cs

@@ -0,0 +1,78 @@
+// <copyright file="ChatRoomManager.cs" company="MUnique">
+// Licensed under the MIT License. See LICENSE file in the project root for full license information.
+// </copyright>
+
+namespace MUnique.OpenMU.ChatServer;
+
+using System.Collections.Concurrent;
+using Microsoft.Extensions.Logging;
+
+/// <summary>
+/// The Chat Room Manager manages the creation and destruction of chat rooms.
+/// </summary>
+internal class ChatRoomManager
+{
+    private readonly ILoggerFactory _loggerFactory;
+
+    /// <summary>
+    /// All currently used chat rooms.
+    /// </summary>
+    private readonly IDictionary<ushort, ChatRoom> _rooms = new ConcurrentDictionary<ushort, ChatRoom>();
+
+    private readonly ConcurrentBag<ushort> _freeRoomIds = new();
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="ChatRoomManager" /> class.
+    /// </summary>
+    /// <param name="loggerFactory">The logger factory.</param>
+    public ChatRoomManager(ILoggerFactory loggerFactory)
+    {
+        this._loggerFactory = loggerFactory;
+        for (ushort i = 0; i < ushort.MaxValue; ++i)
+        {
+            this._freeRoomIds.Add(i);
+        }
+    }
+
+    /// <summary>
+    /// Gets the opened rooms.
+    /// </summary>
+    public ICollection<ChatRoom> OpenedRooms => this._rooms.Values;
+
+    /// <summary>
+    /// Creates a new ChatRoom and returns its Room-ID.
+    /// </summary>
+    /// <returns>The Room-ID of the new room. Returns ushort.MaxValue, if there is no free chat room available.</returns>
+    public ushort CreateChatRoom()
+    {
+        if (!this._freeRoomIds.TryTake(out ushort roomId))
+        {
+            throw new InvalidOperationException("There is no free room id, so the chat room couldn't be created.");
+        }
+
+        var room = new ChatRoom(roomId, this._loggerFactory.CreateLogger<ChatRoom>());
+        room.RoomClosed += this.OnChatRoomClosed;
+        this._rooms.Add(roomId, room);
+        return roomId;
+    }
+
+    /// <summary>
+    /// Returns the chat room with the corresponding Room-ID.
+    /// Returns null, if ChatRoom wasn't found.
+    /// </summary>
+    /// <param name="roomId">Room-ID.</param>
+    /// <returns>ChatRoom or null.</returns>
+    internal ChatRoom? GetChatRoom(ushort roomId)
+    {
+        this._rooms.TryGetValue(roomId, out var room);
+        return room;
+    }
+
+    private void OnChatRoomClosed(object? sender, ChatRoomClosedEventArgs eventArgs)
+    {
+        var room = eventArgs.ChatRoom;
+        this._rooms.Remove(room.RoomId);
+        this._freeRoomIds.Add(room.RoomId);
+        room.Dispose();
+    }
+}