394 lines
16 KiB
C#
394 lines
16 KiB
C#
using SharpChat.Events;
|
|
using SharpChat.EventStorage;
|
|
using SharpChat.Packet;
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Diagnostics.Tracing;
|
|
using System.Linq;
|
|
using System.Net;
|
|
using System.Threading;
|
|
|
|
namespace SharpChat
|
|
{
|
|
public class ChatContext {
|
|
public record ChannelUserAssoc(long UserId, string ChannelName);
|
|
|
|
public readonly SemaphoreSlim ContextAccess = new(1, 1);
|
|
|
|
public HashSet<ChatChannel> Channels { get; } = new();
|
|
public HashSet<ChatConnection> Connections { get; } = new();
|
|
public HashSet<ChatUser> Users { get; } = new();
|
|
public IEventStorage Events { get; }
|
|
public HashSet<ChannelUserAssoc> ChannelUsers { get; } = new();
|
|
public Dictionary<long, RateLimiter> UserRateLimiters { get; } = new();
|
|
public Dictionary<long, ChatChannel> UserLastChannel { get; } = new();
|
|
|
|
public ChatContext(IEventStorage evtStore) {
|
|
Events = evtStore ?? throw new ArgumentNullException(nameof(evtStore));
|
|
}
|
|
|
|
public void DispatchEvent(IChatEvent eventInfo) {
|
|
if(eventInfo is MessageCreateEvent mce) {
|
|
if(mce.IsBroadcast) {
|
|
Send(new LegacyCommandResponse(LCR.BROADCAST, false, mce.MessageText));
|
|
} else if(mce.IsPrivate) {
|
|
// The channel name returned by GetDMChannelName should not be exposed to the user, instead @<Target User> should be displayed
|
|
// e.g. nook sees @Arysil and Arysil sees @nook
|
|
|
|
// this entire routine is garbage, channels should probably in the db
|
|
if(!mce.ChannelName.StartsWith("@"))
|
|
return;
|
|
|
|
IEnumerable<long> uids = mce.ChannelName[1..].Split('-', 3).Select(u => long.TryParse(u, out long up) ? up : -1);
|
|
if(uids.Count() != 2)
|
|
return;
|
|
|
|
IEnumerable<ChatUser> users = Users.Where(u => uids.Any(uid => uid == u.UserId));
|
|
ChatUser target = users.FirstOrDefault(u => u.UserId != mce.SenderId);
|
|
if(target == null)
|
|
return;
|
|
|
|
foreach(ChatUser user in users)
|
|
SendTo(user, new ChatMessageAddPacket(
|
|
mce.MessageId,
|
|
DateTimeOffset.Now,
|
|
mce.SenderId,
|
|
mce.SenderId == user.UserId ? $"{target.LegacyName} {mce.MessageText}" : mce.MessageText,
|
|
mce.IsAction,
|
|
true
|
|
));
|
|
} else {
|
|
ChatChannel channel = Channels.FirstOrDefault(c => c.NameEquals(mce.ChannelName));
|
|
SendTo(channel, new ChatMessageAddPacket(
|
|
mce.MessageId,
|
|
DateTimeOffset.Now,
|
|
mce.SenderId,
|
|
mce.MessageText,
|
|
mce.IsAction,
|
|
false
|
|
));
|
|
}
|
|
|
|
Events.AddEvent(
|
|
mce.MessageId, "msg:add",
|
|
mce.ChannelName,
|
|
mce.SenderId, mce.SenderName, mce.SenderColour, mce.SenderRank, mce.SenderNickName, mce.SenderPerms,
|
|
new { text = mce.MessageText },
|
|
(mce.IsBroadcast ? StoredEventFlags.Broadcast : 0)
|
|
| (mce.IsAction ? StoredEventFlags.Action : 0)
|
|
| (mce.IsPrivate ? StoredEventFlags.Private : 0)
|
|
);
|
|
return;
|
|
}
|
|
}
|
|
|
|
public void Update() {
|
|
foreach(ChatConnection conn in Connections)
|
|
if(!conn.IsDisposed && conn.HasTimedOut) {
|
|
conn.Dispose();
|
|
Logger.Write($"Nuked connection {conn.Id} associated with {conn.User}.");
|
|
}
|
|
|
|
Connections.RemoveWhere(conn => conn.IsDisposed);
|
|
|
|
foreach(ChatUser user in Users)
|
|
if(!Connections.Any(conn => conn.User == user)) {
|
|
HandleDisconnect(user, UserDisconnectReason.TimeOut);
|
|
Logger.Write($"Timed out {user} (no more connections).");
|
|
}
|
|
}
|
|
|
|
public void SafeUpdate() {
|
|
ContextAccess.Wait();
|
|
try {
|
|
Update();
|
|
} finally {
|
|
ContextAccess.Release();
|
|
}
|
|
}
|
|
|
|
public bool IsInChannel(ChatUser user, ChatChannel channel) {
|
|
return ChannelUsers.Contains(new ChannelUserAssoc(user.UserId, channel.Name));
|
|
}
|
|
|
|
public string[] GetUserChannelNames(ChatUser user) {
|
|
return ChannelUsers.Where(cu => cu.UserId == user.UserId).Select(cu => cu.ChannelName).ToArray();
|
|
}
|
|
|
|
public ChatChannel[] GetUserChannels(ChatUser user) {
|
|
string[] names = GetUserChannelNames(user);
|
|
return Channels.Where(c => names.Any(n => c.NameEquals(n))).ToArray();
|
|
}
|
|
|
|
public long[] GetChannelUserIds(ChatChannel channel) {
|
|
return ChannelUsers.Where(cu => channel.NameEquals(cu.ChannelName)).Select(cu => cu.UserId).ToArray();
|
|
}
|
|
|
|
public ChatUser[] GetChannelUsers(ChatChannel channel) {
|
|
long[] ids = GetChannelUserIds(channel);
|
|
return Users.Where(u => ids.Contains(u.UserId)).ToArray();
|
|
}
|
|
|
|
public void UpdateUser(
|
|
ChatUser user,
|
|
string userName = null,
|
|
string nickName = null,
|
|
ChatColour? colour = null,
|
|
ChatUserStatus? status = null,
|
|
string statusText = null,
|
|
int? rank = null,
|
|
ChatUserPermissions? perms = null,
|
|
bool silent = false
|
|
) {
|
|
if(user == null)
|
|
throw new ArgumentNullException(nameof(user));
|
|
|
|
bool hasChanged = false;
|
|
string previousName = null;
|
|
|
|
if(userName != null && !user.UserName.Equals(userName)) {
|
|
user.UserName = userName;
|
|
hasChanged = true;
|
|
}
|
|
|
|
if(nickName != null && !user.NickName.Equals(nickName)) {
|
|
if(!silent)
|
|
previousName = string.IsNullOrWhiteSpace(user.NickName) ? user.UserName : user.NickName;
|
|
|
|
user.NickName = nickName;
|
|
hasChanged = true;
|
|
}
|
|
|
|
if(colour.HasValue && user.Colour != colour.Value) {
|
|
user.Colour = colour.Value;
|
|
hasChanged = true;
|
|
}
|
|
|
|
if(status.HasValue && user.Status != status.Value) {
|
|
user.Status = status.Value;
|
|
hasChanged = true;
|
|
}
|
|
|
|
if(statusText != null && !user.StatusText.Equals(statusText)) {
|
|
user.StatusText = statusText;
|
|
hasChanged = true;
|
|
}
|
|
|
|
if(rank != null && user.Rank != rank) {
|
|
user.Rank = (int)rank;
|
|
hasChanged = true;
|
|
}
|
|
|
|
if(perms.HasValue && user.Permissions != perms) {
|
|
user.Permissions = perms.Value;
|
|
hasChanged = true;
|
|
}
|
|
|
|
if(hasChanged)
|
|
SendToUserChannels(user, new UserUpdatePacket(user, previousName));
|
|
}
|
|
|
|
public void BanUser(ChatUser user, TimeSpan duration, UserDisconnectReason reason = UserDisconnectReason.Kicked) {
|
|
if (duration > TimeSpan.Zero) {
|
|
DateTimeOffset expires = duration >= TimeSpan.MaxValue ? DateTimeOffset.MaxValue : DateTimeOffset.Now + duration;
|
|
SendTo(user, new ForceDisconnectPacket(ForceDisconnectReason.Banned, expires));
|
|
} else
|
|
SendTo(user, new ForceDisconnectPacket(ForceDisconnectReason.Kicked));
|
|
|
|
foreach(ChatConnection conn in Connections)
|
|
if(conn.User == user)
|
|
conn.Dispose();
|
|
Connections.RemoveWhere(conn => conn.IsDisposed);
|
|
|
|
HandleDisconnect(user, reason);
|
|
}
|
|
|
|
public void HandleJoin(ChatUser user, ChatChannel chan, ChatConnection conn, int maxMsgLength) {
|
|
if(!IsInChannel(user, chan)) {
|
|
SendTo(chan, new UserConnectPacket(DateTimeOffset.Now, user));
|
|
Events.AddEvent("user:connect", user, chan, flags: StoredEventFlags.Log);
|
|
}
|
|
|
|
conn.Send(new AuthSuccessPacket(user, chan, conn, maxMsgLength));
|
|
conn.Send(new ContextUsersPacket(GetChannelUsers(chan).Except(new[] { user }).OrderByDescending(u => u.Rank)));
|
|
|
|
foreach(StoredEventInfo msg in Events.GetChannelEventLog(chan.Name))
|
|
conn.Send(new ContextMessagePacket(msg));
|
|
|
|
conn.Send(new ContextChannelsPacket(Channels.Where(c => c.Rank <= user.Rank)));
|
|
|
|
Users.Add(user);
|
|
|
|
ChannelUsers.Add(new ChannelUserAssoc(user.UserId, chan.Name));
|
|
UserLastChannel[user.UserId] = chan;
|
|
}
|
|
|
|
public void HandleDisconnect(ChatUser user, UserDisconnectReason reason = UserDisconnectReason.Leave) {
|
|
UpdateUser(user, status: ChatUserStatus.Offline);
|
|
Users.Remove(user);
|
|
UserLastChannel.Remove(user.UserId);
|
|
|
|
ChatChannel[] channels = GetUserChannels(user);
|
|
|
|
foreach(ChatChannel chan in channels) {
|
|
ChannelUsers.Remove(new ChannelUserAssoc(user.UserId, chan.Name));
|
|
|
|
SendTo(chan, new UserDisconnectPacket(DateTimeOffset.Now, user, reason));
|
|
Events.AddEvent("user:disconnect", user, chan, new { reason = (int)reason }, StoredEventFlags.Log);
|
|
|
|
if(chan.IsTemporary && chan.IsOwner(user))
|
|
RemoveChannel(chan);
|
|
}
|
|
}
|
|
|
|
public void SwitchChannel(ChatUser user, ChatChannel chan, string password) {
|
|
if(UserLastChannel.TryGetValue(user.UserId, out ChatChannel ulc) && chan == ulc) {
|
|
ForceChannel(user);
|
|
return;
|
|
}
|
|
|
|
if(!user.Can(ChatUserPermissions.JoinAnyChannel) && chan.IsOwner(user)) {
|
|
if(chan.Rank > user.Rank) {
|
|
SendTo(user, new LegacyCommandResponse(LCR.CHANNEL_INSUFFICIENT_HIERARCHY, true, chan.Name));
|
|
ForceChannel(user);
|
|
return;
|
|
}
|
|
|
|
if(!string.IsNullOrEmpty(chan.Password) && chan.Password != password) {
|
|
SendTo(user, new LegacyCommandResponse(LCR.CHANNEL_INVALID_PASSWORD, true, chan.Name));
|
|
ForceChannel(user);
|
|
return;
|
|
}
|
|
}
|
|
|
|
ForceChannelSwitch(user, chan);
|
|
}
|
|
|
|
public void ForceChannelSwitch(ChatUser user, ChatChannel chan) {
|
|
if(!Channels.Contains(chan))
|
|
return;
|
|
|
|
ChatChannel oldChan = UserLastChannel[user.UserId];
|
|
|
|
SendTo(oldChan, new UserChannelLeavePacket(user));
|
|
Events.AddEvent("chan:leave", user, oldChan, flags: StoredEventFlags.Log);
|
|
SendTo(chan, new UserChannelJoinPacket(user));
|
|
Events.AddEvent("chan:join", user, oldChan, flags: StoredEventFlags.Log);
|
|
|
|
SendTo(user, new ContextClearPacket(chan, ContextClearMode.MessagesUsers));
|
|
SendTo(user, new ContextUsersPacket(GetChannelUsers(chan).Except(new[] { user }).OrderByDescending(u => u.Rank)));
|
|
|
|
foreach(StoredEventInfo msg in Events.GetChannelEventLog(chan.Name))
|
|
SendTo(user, new ContextMessagePacket(msg));
|
|
|
|
ForceChannel(user, chan);
|
|
|
|
ChannelUsers.Remove(new ChannelUserAssoc(user.UserId, oldChan.Name));
|
|
ChannelUsers.Add(new ChannelUserAssoc(user.UserId, chan.Name));
|
|
UserLastChannel[user.UserId] = chan;
|
|
|
|
if(oldChan.IsTemporary && oldChan.IsOwner(user))
|
|
RemoveChannel(oldChan);
|
|
}
|
|
|
|
public void Send(IServerPacket packet) {
|
|
if(packet == null)
|
|
throw new ArgumentNullException(nameof(packet));
|
|
|
|
foreach(ChatConnection conn in Connections)
|
|
if(conn.IsAuthed)
|
|
conn.Send(packet);
|
|
}
|
|
|
|
public void SendTo(ChatUser user, IServerPacket packet) {
|
|
if(user == null)
|
|
throw new ArgumentNullException(nameof(user));
|
|
if(packet == null)
|
|
throw new ArgumentNullException(nameof(packet));
|
|
|
|
foreach(ChatConnection conn in Connections)
|
|
if(conn.IsAlive && conn.User == user)
|
|
conn.Send(packet);
|
|
}
|
|
|
|
public void SendTo(ChatChannel channel, IServerPacket packet) {
|
|
if(channel == null)
|
|
throw new ArgumentNullException(nameof(channel));
|
|
if(packet == null)
|
|
throw new ArgumentNullException(nameof(packet));
|
|
|
|
// might be faster to grab the users first and then cascade into that SendTo
|
|
IEnumerable<ChatConnection> conns = Connections.Where(c => c.IsAuthed && IsInChannel(c.User, channel));
|
|
foreach(ChatConnection conn in conns)
|
|
conn.Send(packet);
|
|
}
|
|
|
|
public void SendToUserChannels(ChatUser user, IServerPacket packet) {
|
|
if(user == null)
|
|
throw new ArgumentNullException(nameof(user));
|
|
if(packet == null)
|
|
throw new ArgumentNullException(nameof(packet));
|
|
|
|
IEnumerable<ChatChannel> chans = Channels.Where(c => IsInChannel(user, c));
|
|
IEnumerable<ChatConnection> conns = Connections.Where(conn => conn.IsAuthed && ChannelUsers.Any(cu => cu.UserId == conn.User.UserId && chans.Any(chan => chan.NameEquals(cu.ChannelName))));
|
|
foreach(ChatConnection conn in conns)
|
|
conn.Send(packet);
|
|
}
|
|
|
|
public IPAddress[] GetRemoteAddresses(ChatUser user) {
|
|
return Connections.Where(c => c.IsAlive && c.User == user).Select(c => c.RemoteAddress).Distinct().ToArray();
|
|
}
|
|
|
|
public void ForceChannel(ChatUser user, ChatChannel chan = null) {
|
|
if(user == null)
|
|
throw new ArgumentNullException(nameof(user));
|
|
|
|
if(chan == null && !UserLastChannel.TryGetValue(user.UserId, out chan))
|
|
throw new ArgumentException("no channel???");
|
|
|
|
SendTo(user, new UserChannelForceJoinPacket(chan));
|
|
}
|
|
|
|
public void UpdateChannel(ChatChannel channel, bool? temporary = null, int? hierarchy = null, string password = null) {
|
|
if(channel == null)
|
|
throw new ArgumentNullException(nameof(channel));
|
|
if(!Channels.Contains(channel))
|
|
throw new ArgumentException("Provided channel is not registered with this manager.", nameof(channel));
|
|
|
|
if(temporary.HasValue)
|
|
channel.IsTemporary = temporary.Value;
|
|
|
|
if(hierarchy.HasValue)
|
|
channel.Rank = hierarchy.Value;
|
|
|
|
if(password != null)
|
|
channel.Password = password;
|
|
|
|
// TODO: Users that no longer have access to the channel/gained access to the channel by the hierarchy change should receive delete and create packets respectively
|
|
foreach(ChatUser user in Users.Where(u => u.Rank >= channel.Rank)) {
|
|
SendTo(user, new ChannelUpdatePacket(channel.Name, channel));
|
|
}
|
|
}
|
|
|
|
public void RemoveChannel(ChatChannel channel) {
|
|
if(channel == null || !Channels.Any())
|
|
return;
|
|
|
|
ChatChannel defaultChannel = Channels.FirstOrDefault();
|
|
if(defaultChannel == null)
|
|
return;
|
|
|
|
// Remove channel from the listing
|
|
Channels.Remove(channel);
|
|
|
|
// Move all users back to the main channel
|
|
// TODO: Replace this with a kick. SCv2 supports being in 0 channels, SCv1 should force the user back to DefaultChannel.
|
|
foreach(ChatUser user in GetChannelUsers(channel))
|
|
SwitchChannel(user, defaultChannel, string.Empty);
|
|
|
|
// Broadcast deletion of channel
|
|
foreach(ChatUser user in Users.Where(u => u.Rank >= channel.Rank))
|
|
SendTo(user, new ChannelDeletePacket(channel));
|
|
}
|
|
}
|
|
}
|