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Code Issues Releases Wiki Activity

Fix instabilities in channel join logic

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This commit is contained in:
Dean Herbert 2018-11-21 17:15:10 +09:00
parent 4cde66240d
commit 88f82eb722
1 changed files with 57 additions and 32 deletions
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89
osu.Game/Online/Chat/ChannelManager.cs
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@ -1,4 +1,4 @@
// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System;
@ -223,13 +223,11 @@ namespace osu.Game.Online.Chat
{
foreach (var channel in channels)
{
// add as available if not already
if (AvailableChannels.All(c => c.Id != channel.Id))
AvailableChannels.Add(channel);
var ch = getChannel(channel, addToAvailable: true);
// join any channels classified as "defaults"
if (joinDefaults && defaultChannels.Any(c => c.Equals(channel.Name, StringComparison.OrdinalIgnoreCase)))
JoinChannel(channel);
JoinChannel(ch);
}
};
req.Failure += error =>
@ -262,38 +260,68 @@ namespace osu.Game.Online.Chat
api.Queue(fetchInitialMsgReq);
}
public void JoinChannel(Channel channel)
/// <summary>
/// Find an existing channel instance for the provided channel. Lookup is performed basd on ID.
/// The provided channel may be used if an existing instance is not found.
/// </summary>
/// <param name="lookup">A candidate channel to be used for lookup or permanently on lookup failure.</param>
/// <param name="addToAvailable">Whether the channel should be added to <see cref="AvailableChannels"/> if not already.</param>
/// <param name="addToJoined">Whether the channel should be added to <see cref="JoinedChannels"/> if not already.</param>
/// <returns>The found channel.</returns>
private Channel getChannel(Channel lookup, bool addToAvailable = false, bool addToJoined = false)
{
if (channel == null) return;
Channel found = null;
// ReSharper disable once AccessToModifiedClosure
var existing = JoinedChannels.FirstOrDefault(c => c.Id == channel.Id);
var available = AvailableChannels.FirstOrDefault(c => c.Id == lookup.Id);
if (available != null)
found = available;
if (existing != null)
var joined = JoinedChannels.FirstOrDefault(c => c.Id == lookup.Id);
if (found == null && joined != null)
found = joined;
if (found == null)
{
// if we already have this channel loaded, we don't want to make a second one.
channel = existing;
}
else
{
var foundSelf = channel.Users.FirstOrDefault(u => u.Id == api.LocalUser.Value.Id);
found = lookup;
// if we're using a channel object from the server, we want to remove ourselves from the users list.
// this is because we check the first user in the channel to display a name/icon on tabs for now.
var foundSelf = found.Users.FirstOrDefault(u => u.Id == api.LocalUser.Value.Id);
if (foundSelf != null)
channel.Users.Remove(foundSelf);
found.Users.Remove(foundSelf);
}
JoinedChannels.Add(channel);
if (joined == null && addToJoined) JoinedChannels.Add(found);
if (available == null && addToAvailable) AvailableChannels.Add(found);
if (channel.Type == ChannelType.Public && !channel.Joined)
return found;
}
/// <summary>
/// Joins a channel if it has not already been joined.
/// </summary>
/// <param name="channel">The channel to join.</param>
/// <param name="alreadyJoined">Whether the channel has already been joined server-side. Will skip a join request.</param>
/// <returns>The joined channel. Note that this may not match the parameter channel as it is a backed object.</returns>
public Channel JoinChannel(Channel channel, bool alreadyJoined = false)
{
if (channel == null) return null;
channel = getChannel(channel, addToJoined: true);
// ensure we are joined to the channel
if (!channel.Joined.Value)
{
if (!alreadyJoined && channel.Type == ChannelType.Public)
{
var req = new JoinChannelRequest(channel, api.LocalUser);
req.Success += () =>
{
channel.Joined.Value = true;
JoinChannel(channel);
};
req.Success += () => JoinChannel(channel, true);
req.Failure += ex => LeaveChannel(channel);
api.Queue(req);
return;
return channel;
}
channel.Joined.Value = true;
}
if (CurrentChannel.Value == null)
@ -304,6 +332,8 @@ namespace osu.Game.Online.Chat
// let's fetch a small number of messages to bring us up-to-date with the backlog.
fetchInitalMessages(channel);
}
return channel;
}
public void LeaveChannel(Channel channel)
@ -353,13 +383,8 @@ namespace osu.Game.Online.Chat
{
foreach (var channel in updates.Presence)
{
if (!channel.Joined.Value)
{
// we received this from the server so should mark the channel already joined.
channel.Joined.Value = true;
JoinChannel(channel);
}
// we received this from the server so should mark the channel already joined.
JoinChannel(channel, true);
}