sharp-chat/SharpChat/ChatContext.cs

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6.5 KiB
C#
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2022-08-30 15:00:58 +00:00
using SharpChat.Events;
using SharpChat.Flashii;
using SharpChat.Packet;
using System;
using System.Collections.Generic;
using System.Net;
using System.Threading;
namespace SharpChat {
public class ChatContext : IDisposable, IPacketTarget {
public bool IsDisposed { get; private set; }
public SockChatServer Server { get; }
public Timer BumpTimer { get; }
public BanManager Bans { get; }
public ChannelManager Channels { get; }
public UserManager Users { get; }
public ChatEventManager Events { get; }
public string TargetName => @"@broadcast";
public ChatContext(SockChatServer server) {
Server = server;
Bans = new BanManager(this);
Users = new UserManager(this);
Channels = new ChannelManager(this);
Events = new ChatEventManager(this);
BumpTimer = new Timer(e => FlashiiBump.Submit(Users.WithActiveConnections()), null, TimeSpan.Zero, TimeSpan.FromMinutes(1));
}
public void Update() {
Bans.RemoveExpired();
CheckPings();
}
public void BanUser(ChatUser user, DateTimeOffset? until = null, bool banIPs = false, UserDisconnectReason reason = UserDisconnectReason.Kicked) {
if (until.HasValue && until.Value <= DateTimeOffset.UtcNow)
until = null;
if (until.HasValue) {
user.Send(new ForceDisconnectPacket(ForceDisconnectReason.Banned, until.Value));
Bans.Add(user, until.Value);
if (banIPs) {
foreach (IPAddress ip in user.RemoteAddresses)
Bans.Add(ip, until.Value);
}
} else
user.Send(new ForceDisconnectPacket(ForceDisconnectReason.Kicked));
user.Close();
UserLeave(user.Channel, user, reason);
}
public void HandleJoin(ChatUser user, ChatChannel chan, ChatUserSession sess) {
if (!chan.HasUser(user)) {
chan.Send(new UserConnectPacket(DateTimeOffset.Now, user));
Events.Add(new UserConnectEvent(DateTimeOffset.Now, user, chan));
}
sess.Send(new AuthSuccessPacket(user, chan, sess));
sess.Send(new ContextUsersPacket(chan.GetUsers(new[] { user })));
IEnumerable<IChatEvent> msgs = Events.GetTargetLog(chan);
foreach(IChatEvent msg in msgs)
sess.Send(new ContextMessagePacket(msg));
sess.Send(new ContextChannelsPacket(Channels.OfHierarchy(user.Rank)));
if (!chan.HasUser(user))
chan.UserJoin(user);
if (!Users.Contains(user))
Users.Add(user);
}
public void UserLeave(ChatChannel chan, ChatUser user, UserDisconnectReason reason = UserDisconnectReason.Leave) {
user.Status = ChatUserStatus.Offline;
if (chan == null) {
foreach(ChatChannel channel in user.GetChannels()) {
UserLeave(channel, user, reason);
}
return;
}
if (chan.IsTemporary && chan.Owner == user)
Channels.Remove(chan);
chan.UserLeave(user);
chan.Send(new UserDisconnectPacket(DateTimeOffset.Now, user, reason));
Events.Add(new UserDisconnectEvent(DateTimeOffset.Now, user, chan, reason));
}
public void SwitchChannel(ChatUser user, ChatChannel chan, string password) {
if (user.CurrentChannel == chan) {
//user.Send(true, @"samechan", chan.Name);
user.ForceChannel();
return;
}
if (!user.Can(ChatUserPermissions.JoinAnyChannel) && chan.Owner != user) {
if (chan.Rank > user.Rank) {
user.Send(new LegacyCommandResponse(LCR.CHANNEL_INSUFFICIENT_HIERARCHY, true, chan.Name));
user.ForceChannel();
return;
}
if (chan.Password != password) {
user.Send(new LegacyCommandResponse(LCR.CHANNEL_INVALID_PASSWORD, true, chan.Name));
user.ForceChannel();
return;
}
}
ForceChannelSwitch(user, chan);
}
public void ForceChannelSwitch(ChatUser user, ChatChannel chan) {
if (!Channels.Contains(chan))
return;
ChatChannel oldChan = user.CurrentChannel;
oldChan.Send(new UserChannelLeavePacket(user));
Events.Add(new UserChannelLeaveEvent(DateTimeOffset.Now, user, oldChan));
chan.Send(new UserChannelJoinPacket(user));
Events.Add(new UserChannelJoinEvent(DateTimeOffset.Now, user, chan));
user.Send(new ContextClearPacket(chan, ContextClearMode.MessagesUsers));
user.Send(new ContextUsersPacket(chan.GetUsers(new[] { user })));
IEnumerable<IChatEvent> msgs = Events.GetTargetLog(chan);
foreach (IChatEvent msg in msgs)
user.Send(new ContextMessagePacket(msg));
user.ForceChannel(chan);
oldChan.UserLeave(user);
chan.UserJoin(user);
if (oldChan.IsTemporary && oldChan.Owner == user)
Channels.Remove(oldChan);
}
public void CheckPings() {
lock(Users)
foreach (ChatUser user in Users.All()) {
IEnumerable<ChatUserSession> timedOut = user.GetDeadSessions();
foreach(ChatUserSession sess in timedOut) {
user.RemoveSession(sess);
sess.Dispose();
Logger.Write($@"Nuked session {sess.Id} from {user.Username} (timeout)");
}
if(!user.HasSessions)
UserLeave(null, user, UserDisconnectReason.TimeOut);
}
}
public void Send(IServerPacket packet) {
foreach (ChatUser user in Users.All())
user.Send(packet);
}
~ChatContext()
=> Dispose(false);
public void Dispose()
=> Dispose(true);
private void Dispose(bool disposing) {
if (IsDisposed)
return;
IsDisposed = true;
BumpTimer?.Dispose();
Events?.Dispose();
Channels?.Dispose();
Users?.Dispose();
Bans?.Dispose();
if (disposing)
GC.SuppressFinalize(this);
}
}
}