protected virtual bool AddChatUser(ChatUserExtension user)
{
// Add the new user
ChatUsers[user.Username.ToLower()] = user;
user.Peer.Disconnected += OnClientDisconnected;
return(true);
}
/// <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 OnChatMessageReceived(ChatMessagePacket message,
ChatUserExtension sender, IIncommingMessage rawMessage)
{
// Set a true sender
message.Sender = sender.Username;
switch (message.Type)
{
case ChatMessagePacket.ChannelMessage:
if (string.IsNullOrEmpty(message.Receiver))
{
// If this is a local chat message (no receiver is provided)
if (sender.DefaultChannel == null)
{
rawMessage.Respond("No channel is set to be your local channel", ResponseStatus.Failed);
return(true);
}
sender.DefaultChannel.BroadcastMessage(message);
rawMessage.Respond(ResponseStatus.Success);
return(true);
}
// Find the channel
Channels.TryGetValue(message.Receiver.ToLower(), out var channel);
if (channel == null || !sender.CurrentChannels.Contains(channel))
{
// Not in this channel
rawMessage.Respond($"You're not in the '{message.Receiver}' channel",
ResponseStatus.Failed);
return(true);
}
channel.BroadcastMessage(message);
rawMessage.Respond(ResponseStatus.Success);
return(true);
case ChatMessagePacket.PrivateMessage:
ChatUsers.TryGetValue(message.Receiver.ToLower(), out var receiver);
if (receiver == null)
{
rawMessage.Respond($"User '{message.Receiver}' is not online", ResponseStatus.Failed);
return(true);
}
receiver.Peer.SendMessage((short)OpCodes.ChatMessage, message);
rawMessage.Respond(ResponseStatus.Success);
return(true);
}
return(false);
}
protected virtual void RemoveChatUser(ChatUserExtension user)
{
ChatUsers.Remove(user.Username.ToLower());
var channels = user.CurrentChannels.ToList();
foreach (var chatChannel in channels)
{
chatChannel.RemoveUser(user);
}
user.Peer.Disconnected -= OnClientDisconnected;
}
protected virtual void OnLeft(ChatUserExtension removedUser)
{
var data = new List <string>()
{
Name, removedUser.Username
};
var msg = MessageHelper.Create((short)OpCodes.UserLeftChannel, data.ToBytes());
foreach (var user in _users.Values)
{
if (user != removedUser)
{
user.Peer.SendMessage(msg, DeliveryMethod.ReliableOrdered);
}
}
}
public void RemoveUser(ChatUserExtension user)
{
// Remove disconnect listener
user.Peer.Disconnected -= 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(ChatUserExtension user)
{
if (!IsUserAllowed(user))
{
return(false);
}
// Add disconnect listener
user.Peer.Disconnected += OnUserDisconnect;
// Add user
_users.Add(user.Username, user);
// Add channel to users collection
user.CurrentChannels.Add(this);
OnJoined(user);
return(true);
}
protected virtual void HandlePickUsername(IIncommingMessage message)
{
if (!AllowUsernamePicking)
{
message.Respond("Username picking is disabled", ResponseStatus.Failed);
return;
}
var username = message.AsString();
if (username.Replace(" ", "") != username)
{
message.Respond("Username cannot contain whitespaces", ResponseStatus.Failed);
return;
}
var chatUser = message.Peer.GetExtension <ChatUserExtension>();
if (chatUser != null)
{
message.Respond("You're already identified as: " + chatUser);
return;
}
if (ChatUsers.ContainsKey(username.ToLower()))
{
message.Respond("There's already a user who has the same username", ResponseStatus.Failed);
return;
}
chatUser = new ChatUserExtension(message.Peer, username);
if (!AddChatUser(chatUser))
{
message.Respond("Failed to add user to chat", ResponseStatus.Failed);
return;
}
// Add the extension
message.Peer.AddExtension(chatUser);
message.Respond(ResponseStatus.Success);
}
protected virtual bool IsUserAllowed(ChatUserExtension user)
{
// Can't join if already here
return(!_users.ContainsKey(user.Username));
}