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Fix proxying in channels without message history + reduce proxy latency

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This commit is contained in:
Ske 2021-08-08 21:56:24 +02:00
parent 1720a28af2
commit 4c17ee3d89
6 changed files with 35 additions and 36 deletions
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2
PluralKit.Bot/Commands/MessageEdit.cs
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@ -95,6 +95,8 @@ namespace PluralKit.Bot
throw new PKError("Could not find a recent message to edit.");
msg = await _repo.GetMessage(conn, recent.Mid);
if (msg == null)
throw new PKError("Could not find a recent message to edit.");
}
return msg;

2
PluralKit.Bot/Handlers/MessageCreated.cs
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@ -53,7 +53,7 @@ namespace PluralKit.Bot
private bool IsDuplicateMessage(Message msg) =>
// We consider a message duplicate if it has the same ID as the previous message that hit the gateway
_lastMessageCache.GetLastMessage(msg.ChannelId)?.Id == msg.Id;
_lastMessageCache.GetLastMessage(msg.ChannelId)?.Current.Id == msg.Id;
public async Task Handle(Shard shard, MessageCreateEvent evt)
{

2
PluralKit.Bot/Handlers/MessageEdited.cs
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@ -55,7 +55,7 @@ namespace PluralKit.Bot
if (!DiscordUtils.IsValidGuildChannel(channel))
return;
var guild = _cache.GetGuild(channel.GuildId!.Value);
var lastMessage = _lastMessageCache.GetLastMessage(evt.ChannelId);
var lastMessage = _lastMessageCache.GetLastMessage(evt.ChannelId)?.Current;
// Only react to the last message in the channel
if (lastMessage?.Id != evt.Id)

28
PluralKit.Bot/Proxy/ProxyService.cs
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@ -242,40 +242,32 @@ namespace PluralKit.Bot
};
}
private async Task<string> FixSameName(ulong channel_id, MessageContext ctx, ProxyMember member)
private async Task<string> FixSameName(ulong channelId, MessageContext ctx, ProxyMember member)
{
var proxyName = member.ProxyName(ctx);
Message? lastMessage = null;
var lastMessageId = _lastMessage.GetLastMessage(channel_id)?.Previous;
if (lastMessageId == null)
var lastMessage = _lastMessage.GetLastMessage(channelId)?.Previous;
if (lastMessage == null)
// cache is out of date or channel is empty.
return proxyName;
lastMessage = await _rest.GetMessage(channel_id, lastMessageId.Value);
if (lastMessage == null)
// we don't have enough information to figure out if we need to fix the name, so bail here.
return proxyName;
await using var conn = await _db.Obtain();
var message = await _repo.GetMessage(conn, lastMessage.Id);
var pkMessage = await _repo.GetMessage(conn, lastMessage.Id);
if (lastMessage.Author.Username == proxyName)
if (lastMessage.AuthorUsername == proxyName)
{
// last message wasn't proxied by us, but somehow has the same name
// it's probably from a different webhook (Tupperbox?) but let's fix it anyway!
if (message == null)
if (pkMessage == null)
return FixSameNameInner(proxyName);
// last message was proxied by a different member
if (message.Member.Id != member.Id)
if (pkMessage.Member.Id != member.Id)
return FixSameNameInner(proxyName);
}
// if we fixed the name last message and it's the same member proxying, we want to fix it again
if (lastMessage.Author.Username == FixSameNameInner(proxyName) && message?.Member.Id == member.Id)
if (lastMessage.AuthorUsername == FixSameNameInner(proxyName) && pkMessage?.Member.Id == member.Id)
return FixSameNameInner(proxyName);
// No issues found, current proxy name is fine.

35
PluralKit.Bot/Services/LastMessageCacheService.cs
View File

@ -1,7 +1,6 @@
#nullable enable
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using Myriad.Types;
@ -10,15 +9,19 @@ namespace PluralKit.Bot
// TODO: Should this be moved to Myriad.Cache?
public class LastMessageCacheService
{
private readonly IDictionary<ulong, CachedMessage> _cache = new ConcurrentDictionary<ulong, CachedMessage>();
private readonly IDictionary<ulong, CacheEntry> _cache = new ConcurrentDictionary<ulong, CacheEntry>();
public void AddMessage(Message msg)
{
var previous = GetLastMessage(msg.ChannelId);
_cache[msg.ChannelId] = new CachedMessage(msg.Id, msg.ReferencedMessage.Value?.Id, previous?.Id);
var current = ToCachedMessage(msg);
_cache[msg.ChannelId] = new(current, previous?.Current);
}
public CachedMessage? GetLastMessage(ulong channel)
private CachedMessage ToCachedMessage(Message msg) =>
new(msg.Id, msg.ReferencedMessage.Value?.Id, msg.Author.Username);
public CacheEntry? GetLastMessage(ulong channel)
{
return _cache.TryGetValue(channel, out var message) ? message : null;
}
@ -29,13 +32,13 @@ namespace PluralKit.Bot
if (storedMessage == null)
return;
if (message == storedMessage.Id)
if (message == storedMessage.Current.Id)
if (storedMessage.Previous != null)
_cache[channel] = new CachedMessage(storedMessage.Previous.Value, null, null);
_cache[channel] = new(storedMessage.Previous, null);
else
_cache.Remove(channel);
else if (message == storedMessage.Previous)
_cache[channel] = new CachedMessage(storedMessage.Id, storedMessage.ReferencedMessage, null);
else if (message == storedMessage.Previous?.Id)
_cache[channel] = new(storedMessage.Current, null);
}
public void HandleMessageDeletion(ulong channel, List<ulong> messages)
@ -44,21 +47,21 @@ namespace PluralKit.Bot
if (storedMessage == null)
return;
if (!(messages.Contains(storedMessage.Id) || (storedMessage.Previous != null && messages.Contains(storedMessage.Previous.Value))))
if (!(messages.Contains(storedMessage.Current.Id) || storedMessage.Previous != null && messages.Contains(storedMessage.Previous.Id)))
// none of the deleted messages are relevant to the cache
return;
ulong? newLastMessage = null;
if (messages.Contains(storedMessage.Id))
newLastMessage = storedMessage.Previous;
if (messages.Contains(storedMessage.Current.Id))
newLastMessage = storedMessage.Previous?.Id;
if (storedMessage.Previous != null && messages.Contains(storedMessage.Previous.Value))
if (newLastMessage == storedMessage.Previous)
if (storedMessage.Previous != null && messages.Contains(storedMessage.Previous.Id))
if (newLastMessage == storedMessage.Previous?.Id)
newLastMessage = null;
else
{
_cache[channel] = new CachedMessage(storedMessage.Id, storedMessage.ReferencedMessage, null);
_cache[channel] = new(storedMessage.Current, null);
return;
}
@ -67,5 +70,7 @@ namespace PluralKit.Bot
}
}
public record CachedMessage(ulong Id, ulong? ReferencedMessage, ulong? Previous);
public record CacheEntry(CachedMessage Current, CachedMessage? Previous);
public record CachedMessage(ulong Id, ulong? ReferencedMessage, string AuthorUsername);
}

2
PluralKit.Core/Database/Repository/ModelRepository.Message.cs
View File

@ -14,7 +14,7 @@ namespace PluralKit.Core
_logger.Debug("Stored message {@StoredMessage} in channel {Channel}", msg, msg.Channel);
}
public async Task<FullMessage> GetMessage(IPKConnection conn, ulong id)
public async Task<FullMessage?> GetMessage(IPKConnection conn, ulong id)
{
FullMessage Mapper(PKMessage msg, PKMember member, PKSystem system) =>
new FullMessage {Message = msg, System = system, Member = member};