protected virtual void OnLeft(ChatUserPeerExtension removedUser)
{
var data = new List <string>()
{
Name, removedUser.Username
};
var msg = Msf.Create.Message((short)MsfMessageCodes.UserLeftChannel, data.ToBytes());
foreach (var user in _users.Values)
{
if (user != removedUser)
{
user.Peer.SendMessage(msg, DeliveryMethod.Reliable);
}
}
}
public void RemoveUser(ChatUserPeerExtension user)
{
// Remove disconnect listener
user.Peer.OnPeerDisconnectedEvent -= OnUserDisconnect;
// Remove channel from users collection
user.CurrentChannels.Remove(this);
// Remove user
_users.Remove(user.Username);
if (user.DefaultChannel == this)
{
user.DefaultChannel = null;
}
OnLeft(user);
}
/// <summary>
/// Returns true, if user successfully joined a channel
/// </summary>
/// <param name="user"></param>
/// <returns></returns>
public bool AddUser(ChatUserPeerExtension user)
{
if (!IsUserAllowed(user))
{
return(false);
}
// Add disconnect listener
user.Peer.OnPeerDisconnectedEvent += OnUserDisconnect;
// Add user
_users.Add(user.Username, user);
// Add channel to users collection
user.CurrentChannels.Add(this);
OnJoined(user);
return(true);
}
/// <summary>
/// Remove user from chat
/// </summary>
/// <param name="user"></param>
protected virtual void RemoveChatUser(ChatUserPeerExtension user)
{
string username = user.Username.ToLower();
// Remove from chat users list
ChatUsers.Remove(username);
var channels = user.CurrentChannels.ToList();
// Remove from channels
foreach (var chatChannel in channels)
{
chatChannel.RemoveUser(user);
}
// Stop listening this removed user disconnection
user.Peer.OnPeerDisconnectedEvent -= OnClientDisconnected;
logger.Debug($"User {username} has been successfully removed from chat");
}
/// <summary>
/// Add new user to chat
/// </summary>
/// <param name="user"></param>
/// <returns></returns>
protected virtual bool AddChatUser(ChatUserPeerExtension user)
{
string username = user.Username.ToLower();
if (ChatUsers.ContainsKey(username))
{
logger.Error($"Trying to add user {username} to chat, but one is already connected");
return(false);
}
else
{
// Add the new user
ChatUsers[user.Username.ToLower()] = user;
// Start listening user disconnection
user.Peer.OnPeerDisconnectedEvent += OnClientDisconnected;
logger.Debug($"User {username} has been successfully added to chat");
return(true);
}
}
protected virtual bool IsUserAllowed(ChatUserPeerExtension user)
{
// Can't join if already here
return(!_users.ContainsKey(user.Username));
}
protected virtual void OnPickUsernameRequestHandler(IIncommingMessage message)
{
string responseMsg = string.Empty;
if (!allowUsernamePicking)
{
responseMsg = "Username picking is disabled";
logger.Error(responseMsg);
message.Respond(responseMsg, ResponseStatus.Failed);
return;
}
var username = message.AsString();
if (username.Contains(" "))
{
responseMsg = "Username cannot contain whitespaces";
logger.Error(responseMsg);
message.Respond(responseMsg, ResponseStatus.Failed);
return;
}
var chatUser = message.Peer.GetExtension <ChatUserPeerExtension>();
if (chatUser != null)
{
responseMsg = $"You're already identified as: {chatUser.Username}";
logger.Error(responseMsg);
message.Respond(responseMsg);
return;
}
if (ChatUsers.ContainsKey(username.ToLower()))
{
responseMsg = "There's already a user who has the same username";
logger.Error(responseMsg);
message.Respond(responseMsg, ResponseStatus.Failed);
return;
}
chatUser = new ChatUserPeerExtension(message.Peer, username);
if (!AddChatUser(chatUser))
{
responseMsg = "Failed to add user to chat";
logger.Error(responseMsg);
message.Respond(responseMsg, ResponseStatus.Failed);
return;
}
// Add the extension
message.Peer.AddExtension(chatUser);
message.Respond(ResponseStatus.Success);
}
/// <summary>
/// Handles chat message.
/// Returns true, if message was handled
/// If it returns false, message sender will receive a "Not Handled" response.
/// </summary>
protected virtual bool TryHandleChatMessage(ChatMessagePacket message, ChatUserPeerExtension sender, IIncommingMessage rawMessage)
{
// Set a true sender
message.Sender = sender.Username;
string responseMsg = string.Empty;
switch (message.MessageType)
{
case ChatMessageType.ChannelMessage:
if (string.IsNullOrEmpty(message.Receiver))
{
// If this is a local chat message (no receiver is provided)
if (sender.DefaultChannel == null)
{
responseMsg = "No channel is set to be your local channel";
logger.Debug(responseMsg);
rawMessage.Respond(responseMsg, ResponseStatus.Failed);
return(true);
}
sender.DefaultChannel.BroadcastMessage(message);
rawMessage.Respond(ResponseStatus.Success);
return(true);
}
// Find the channel
if (!ChatChannels.TryGetValue(message.Receiver.ToLower(), out ChatChannel channel) || !sender.CurrentChannels.Contains(channel))
{
responseMsg = $"You're not in the '{message.Receiver}' channel";
logger.Error(responseMsg);
// Not in this channel
rawMessage.Respond(responseMsg, ResponseStatus.Failed);
return(true);
}
channel.BroadcastMessage(message);
rawMessage.Respond(ResponseStatus.Success);
return(true);
case ChatMessageType.PrivateMessage:
if (!ChatUsers.TryGetValue(message.Receiver.ToLower(), out ChatUserPeerExtension receiver))
{
responseMsg = $"User '{message.Receiver}' is not online";
logger.Error(responseMsg);
rawMessage.Respond(responseMsg, ResponseStatus.Failed);
return(true);
}
receiver.Peer.SendMessage((short)MsfMessageCodes.ChatMessage, message);
rawMessage.Respond(ResponseStatus.Success);
return(true);
}
return(false);
}