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sam 2024-09-03 00:07:12 +02:00
commit b3bf3a7c16
Signed by: sam
GPG key ID: B4EF20DDE721CAA1
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bin/
obj/
/packages/
riderModule.iml
/_ReSharper.Caches/
*.DotSettings.user

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# Default ignored files
/shelf/
/workspace.xml
# Rider ignored files
/contentModel.xml
/projectSettingsUpdater.xml
/modules.xml
/.idea.Foxcord.iml
# Editor-based HTTP Client requests
/httpRequests/
# Datasource local storage ignored files
/dataSources/
/dataSources.local.xml

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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="Encoding" addBOMForNewFiles="with BOM under Windows, with no BOM otherwise" />
</project>

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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="UserContentModel">
<attachedFolders />
<explicitIncludes />
<explicitExcludes />
</component>
</project>

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.idea/.idea.Foxcord/.idea/misc.xml generated Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="DiscordProjectSettings">
<option name="show" value="ASK" />
<option name="description" value="" />
</component>
</project>

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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="VcsDirectoryMappings">
<mapping directory="$PROJECT_DIR$" vcs="Git" />
</component>
</project>

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GNU GENERAL PUBLIC LICENSE
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Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
This version of the GNU Lesser General Public License incorporates
the terms and conditions of version 3 of the GNU General Public
License, supplemented by the additional permissions listed below.
0. Additional Definitions.
As used herein, "this License" refers to version 3 of the GNU Lesser
General Public License, and the "GNU GPL" refers to version 3 of the GNU
General Public License.
"The Library" refers to a covered work governed by this License,
other than an Application or a Combined Work as defined below.
An "Application" is any work that makes use of an interface provided
by the Library, but which is not otherwise based on the Library.
Defining a subclass of a class defined by the Library is deemed a mode
of using an interface provided by the Library.
A "Combined Work" is a work produced by combining or linking an
Application with the Library. The particular version of the Library
with which the Combined Work was made is also called the "Linked
Version".
The "Minimal Corresponding Source" for a Combined Work means the
Corresponding Source for the Combined Work, excluding any source code
for portions of the Combined Work that, considered in isolation, are
based on the Application, and not on the Linked Version.
The "Corresponding Application Code" for a Combined Work means the
object code and/or source code for the Application, including any data
and utility programs needed for reproducing the Combined Work from the
Application, but excluding the System Libraries of the Combined Work.
1. Exception to Section 3 of the GNU GPL.
You may convey a covered work under sections 3 and 4 of this License
without being bound by section 3 of the GNU GPL.
2. Conveying Modified Versions.
If you modify a copy of the Library, and, in your modifications, a
facility refers to a function or data to be supplied by an Application
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facility is invoked), then you may convey a copy of the modified
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a) under this License, provided that you make a good faith effort to
ensure that, in the event an Application does not supply the
function or data, the facility still operates, and performs
whatever part of its purpose remains meaningful, or
b) under the GNU GPL, with none of the additional permissions of
this License applicable to that copy.
3. Object Code Incorporating Material from Library Header Files.
The object code form of an Application may incorporate material from
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Library is used in it and that the Library and its use are
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taken together, effectively do not restrict modification of the
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c) For a Combined Work that displays copyright notices during
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these notices, as well as a reference directing the user to the
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d) Do one of the following:
0) Convey the Minimal Corresponding Source under the terms of this
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suitable for, and under terms that permit, the user to
recombine or relink the Application with a modified version of
the Linked Version to produce a modified Combined Work, in the
manner specified by section 6 of the GNU GPL for conveying
Corresponding Source.
1) Use a suitable shared library mechanism for linking with the
Library. A suitable mechanism is one that (a) uses at run time
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Application with a modified version of the Linked Version. (If
you use option 4d0, the Installation Information must accompany
the Minimal Corresponding Source and Corresponding Application
Code. If you use option 4d1, you must provide the Installation
Information in the manner specified by section 6 of the GNU GPL
for conveying Corresponding Source.)
5. Combined Libraries.
You may place library facilities that are a work based on the
Library side by side in a single library together with other library
facilities that are not Applications and are not covered by this
License, and convey such a combined library under terms of your
choice, if you do both of the following:
a) Accompany the combined library with a copy of the same work based
on the Library, uncombined with any other library facilities,
conveyed under the terms of this License.
b) Give prominent notice with the combined library that part of it
is a work based on the Library, and explaining where to find the
accompanying uncombined form of the same work.
6. Revised Versions of the GNU Lesser General Public License.
The Free Software Foundation may publish revised and/or new versions
of the GNU Lesser General Public License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the
Library as you received it specifies that a certain numbered version
of the GNU Lesser General Public License "or any later version"
applies to it, you have the option of following the terms and
conditions either of that published version or of any later version
published by the Free Software Foundation. If the Library as you
received it does not specify a version number of the GNU Lesser
General Public License, you may choose any version of the GNU Lesser
General Public License ever published by the Free Software Foundation.
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Library.

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Microsoft Visual Studio Solution File, Format Version 12.00
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Foxcord", "Foxcord\Foxcord.csproj", "{ED72AB3E-F424-4D1C-B134-F6CC7D45A37E}"
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FoxcordTest", "FoxcordTest\FoxcordTest.csproj", "{6A5F7346-ABC6-480D-938E-E97ECB7D1125}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{ED72AB3E-F424-4D1C-B134-F6CC7D45A37E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{ED72AB3E-F424-4D1C-B134-F6CC7D45A37E}.Debug|Any CPU.Build.0 = Debug|Any CPU
{ED72AB3E-F424-4D1C-B134-F6CC7D45A37E}.Release|Any CPU.ActiveCfg = Release|Any CPU
{ED72AB3E-F424-4D1C-B134-F6CC7D45A37E}.Release|Any CPU.Build.0 = Release|Any CPU
{6A5F7346-ABC6-480D-938E-E97ECB7D1125}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{6A5F7346-ABC6-480D-938E-E97ECB7D1125}.Debug|Any CPU.Build.0 = Debug|Any CPU
{6A5F7346-ABC6-480D-938E-E97ECB7D1125}.Release|Any CPU.ActiveCfg = Release|Any CPU
{6A5F7346-ABC6-480D-938E-E97ECB7D1125}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
EndGlobal

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<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
<s:Boolean x:Key="/Default/UserDictionary/Words/=foxcord/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

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Foxcord/Foxcord.csproj Normal file
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Polly.Core" Version="8.4.1" />
<PackageReference Include="Serilog" Version="4.0.1" />
</ItemGroup>
</Project>

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using System.Text.Json;
using Foxcord.Gateway.Events.Dispatch;
using Foxcord.Rest;
using Foxcord.Rest.Types;
namespace Foxcord.Gateway;
public partial class DiscordGatewayClient
{
private IDispatch ParseDispatchEvent(string rawType, JsonElement rawPayload)
{
switch (rawType)
{
case DispatchEventTypeName.Ready:
return rawPayload.Deserialize<ReadyEvent>(_jsonSerializerOptions)!;
case DispatchEventTypeName.GuildCreate:
return rawPayload.Deserialize<GuildCreateEvent>(_jsonSerializerOptions)!;
case DispatchEventTypeName.MessageCreate:
return rawPayload.Deserialize<MessageCreateEvent>(_jsonSerializerOptions)!;
default:
throw new ArgumentOutOfRangeException(nameof(rawType), $"Unknown dispatch event '{rawType}'");
}
}
private async Task HandleDispatch(IDispatch dispatch, CancellationToken ct = default)
{
switch (dispatch)
{
case ReadyEvent ready:
_logger.Debug("Received READY! API version: {Version}, user: {UserId}, shard: {Id}/{Total}",
ready.Version, ready.User.Id, ready.Shard.ShardId, ready.Shard.NumShards);
break;
case GuildCreateEvent guildCreate:
_logger.Debug("Received guild create for guild {Id} / {Name}", guildCreate.Id, guildCreate.Name);
break;
case MessageCreateEvent m:
_logger.Debug("Received message create from {User} in {Channel}. Content: {Content}", m.Author.Tag,
m.ChannelId, m.Content);
if (m.Content == "!ping")
{
var rest = new DiscordRestClient(_logger,
new DiscordRestClientOptions { Token = _token["Bot ".Length..] });
await rest.CreateMessageAsync(m.ChannelId,
new CreateMessageParams(Content: $"Pong! Latency: {Latency.TotalMilliseconds}ms"), ct);
}
break;
default:
_logger.Debug("Received dispatch event {DispatchType}", dispatch.GetType().Name);
break;
}
}
}

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Foxcord/Gateway/DiscordGatewayClient.Events.cs Normal file
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namespace Foxcord.Gateway;
public partial class DiscordGatewayClient
{
private void HandleHeartbeatAck()
{
_lastHeartbeatAck = DateTimeOffset.UtcNow;
_logger.Verbose("Received heartbeat ACK after {Latency}", _lastHeartbeatAck - _lastHeartbeatSend);
}
private async Task HandleHeartbeatRequest(CancellationToken ct = default)
{
_logger.Information("Early heartbeat requested, sending heartbeat");
await WritePacket(new GatewayPacket { Opcode = GatewayOpcode.Heartbeat, Payload = _lastSequence }, ct);
_lastHeartbeatSend = DateTimeOffset.UtcNow;
}
}

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using System.Buffers;
using System.Diagnostics.CodeAnalysis;
using System.Net.WebSockets;
using System.Text.Json;
using Foxcord.Gateway.Events;
using Foxcord.Serialization;
using Serilog;
namespace Foxcord.Gateway;
public partial class DiscordGatewayClient
{
private const int GatewayVersion = 10;
private const int BufferSize = 64 * 1024;
private readonly ILogger _logger;
private ClientWebSocket? _ws;
private readonly string _token;
private readonly Uri _gatewayUri;
private readonly GatewayIntent _intents;
private readonly JsonSerializerOptions _jsonSerializerOptions = JsonSerializerExtensions.CreateSerializer();
private long? _lastSequence = null;
private DateTimeOffset _lastHeartbeatSend = DateTimeOffset.UnixEpoch;
private DateTimeOffset _lastHeartbeatAck = DateTimeOffset.UnixEpoch;
public TimeSpan Latency => _lastHeartbeatAck - _lastHeartbeatSend;
public DiscordGatewayClient(ILogger logger, DiscordGatewayClientOptions opts)
{
_logger = logger.ForContext<DiscordGatewayClient>();
_token = $"Bot {opts.Token}";
var uriBuilder = new UriBuilder(opts.Uri)
{
Query = $"v={GatewayVersion}&encoding=json"
};
_gatewayUri = uriBuilder.Uri;
_intents = opts.Intents;
}
public ConnectionStatus Status { get; private set; } = ConnectionStatus.Dead;
/// <summary>
/// Connects to the gateway. This method returns after a connection is established.
/// <c>ct</c> is stored by the client and cancelling it will close the connection.
/// The caller must pause indefinitely or the bot will shut down immediately.
/// </summary>
[MemberNotNull("_ws")]
public async Task ConnectAsync(CancellationToken ct = default)
{
if (Status != ConnectionStatus.Dead)
throw new DiscordGatewayRequestError(
"Gateway is connecting or connected, only one concurrent connection allowed.");
try
{
_ws = new ClientWebSocket();
Status = ConnectionStatus.Connecting;
await _ws.ConnectAsync(_gatewayUri, ct);
using var cts = CancellationTokenSource.CreateLinkedTokenSource(ct);
cts.CancelAfter(TimeSpan.FromSeconds(30));
var (rawHelloPacketType, rawHelloPacket) = await ReadPacket(cts.Token);
if (rawHelloPacketType == WebSocketMessageType.Close)
throw new DiscordGatewayRequestError("First packet received was a close message");
if (!TryDeserializeEvent(rawHelloPacket, out var rawHelloEvent))
throw new DiscordGatewayRequestError("First packet was not a valid event");
if (rawHelloEvent is not HelloEvent hello)
throw new DiscordGatewayRequestError("First event was not a HELLO event");
_logger.Debug("Received HELLO, heartbeat interval is {HeartbeatInterval}", hello.HeartbeatInterval);
var _ = HeartbeatLoopAsync(hello.HeartbeatInterval, ct);
var __ = ReceiveLoopAsync(ct);
_logger.Debug("Sending IDENTIFY");
await WritePacket(new GatewayPacket
{
Opcode = GatewayOpcode.Identify,
Payload = new IdentifyEvent { Token = _token, Intents = _intents }
}, ct);
}
catch (Exception e)
{
_logger.Error(e, "Error connecting to gateway");
Status = ConnectionStatus.Dead;
_ws = null;
throw;
}
}
private async Task HeartbeatLoopAsync(int heartbeatInterval, CancellationToken ct = default)
{
var delay = TimeSpan.FromMilliseconds(heartbeatInterval * Random.Shared.NextDouble());
_logger.Debug("Waiting {Delay} before sending first heartbeat", delay);
using var timer = new PeriodicTimer(TimeSpan.FromMilliseconds(heartbeatInterval));
while (await timer.WaitForNextTickAsync(ct))
{
_logger.Debug("Sending heartbeat with sequence {Sequence}", _lastSequence);
_lastHeartbeatSend = DateTimeOffset.UtcNow;
await WritePacket(new GatewayPacket { Opcode = GatewayOpcode.Heartbeat, Payload = _lastSequence }, ct);
}
}
private async Task ReceiveLoopAsync(CancellationToken ct = default)
{
while (!ct.IsCancellationRequested)
{
try
{
var (type, packet) = await ReadPacket(ct);
if (type == WebSocketMessageType.Close || packet == null)
{
// TODO: close websocket
return;
}
_ = ReceiveAsync(packet, ct);
}
catch (Exception e)
{
_logger.Error(e, "Error while receiving data");
}
}
async Task ReceiveAsync(GatewayPacket packet, CancellationToken ct2 = default)
{
if (!TryDeserializeEvent(packet, out var gatewayEvent))
{
_logger.Debug("Event {EventType} didn't have payload", packet.Opcode);
return;
}
switch (gatewayEvent)
{
case HeartbeatEvent:
await HandleHeartbeatRequest(ct2);
break;
case HeartbeatAckEvent:
HandleHeartbeatAck();
break;
case DispatchEvent dispatch:
await HandleDispatch(dispatch.Payload, ct2);
break;
}
}
}
private async ValueTask WritePacket(GatewayPacket packet, CancellationToken ct = default)
{
using var buf = MemoryPool<byte>.Shared.Rent(BufferSize);
var json = JsonSerializer.SerializeToUtf8Bytes(packet, _jsonSerializerOptions);
await _ws!.SendAsync(json.AsMemory(), WebSocketMessageType.Text, true, ct);
}
private async ValueTask<(WebSocketMessageType type, GatewayPacket? packet)> ReadPacket(
CancellationToken ct = default)
{
using var buf = MemoryPool<byte>.Shared.Rent(BufferSize);
var res = await _ws!.ReceiveAsync(buf.Memory, ct);
if (res.MessageType == WebSocketMessageType.Close) return (res.MessageType, null);
if (res.EndOfMessage)
return DeserializePacket(res, buf.Memory.Span[..res.Count]);
return await DeserializeMultipleBuffer(res, buf);
}
private async Task<(WebSocketMessageType type, GatewayPacket packet)> DeserializeMultipleBuffer(
ValueWebSocketReceiveResult res, IMemoryOwner<byte> buf)
{
await using var stream = new MemoryStream(BufferSize * 4);
stream.Write(buf.Memory.Span.Slice(0, res.Count));
while (!res.EndOfMessage)
{
res = await _ws!.ReceiveAsync(buf.Memory, default);
stream.Write(buf.Memory.Span.Slice(0, res.Count));
}
return DeserializePacket(res, stream.GetBuffer().AsSpan(0, (int)stream.Length));
}
private (WebSocketMessageType type, GatewayPacket packet) DeserializePacket(
ValueWebSocketReceiveResult res, Span<byte> span) => (res.MessageType,
JsonSerializer.Deserialize<GatewayPacket>(span, _jsonSerializerOptions)!);
private bool TryDeserializeEvent(GatewayPacket? packet, [NotNullWhen(true)] out IGatewayEvent? gatewayEvent)
{
gatewayEvent = null;
if (packet == null) return false;
var payload = packet.Payload is JsonElement element ? element : default;
switch (packet.Opcode)
{
case GatewayOpcode.Hello:
gatewayEvent = payload.Deserialize<HelloEvent>(_jsonSerializerOptions)!;
break;
case GatewayOpcode.Dispatch:
_lastSequence = packet.Sequence;
gatewayEvent = new DispatchEvent { Payload = ParseDispatchEvent(packet.EventType!, payload) };
break;
case GatewayOpcode.Heartbeat:
gatewayEvent = new HeartbeatEvent();
break;
case GatewayOpcode.Reconnect:
case GatewayOpcode.InvalidSession:
throw new NotImplementedException();
case GatewayOpcode.HeartbeatAck:
gatewayEvent = new HeartbeatAckEvent();
break;
default:
throw new ArgumentOutOfRangeException();
}
return true;
}
public enum ConnectionStatus
{
Dead,
Connecting,
Connected
}
}
public class DiscordGatewayClientOptions
{
public required string Token { get; init; }
public required string Uri { get; init; }
public required GatewayIntent Intents { get; init; }
}

3
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namespace Foxcord.Gateway;
public class DiscordGatewayRequestError(string message) : Exception(message);

9
Foxcord/Gateway/Events/Dispatch/GuildCreateEvent.cs Normal file
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using Foxcord.Models;
namespace Foxcord.Gateway.Events.Dispatch;
public class GuildCreateEvent : Guild, IDispatch
{
public bool Unavailable { get; init; } = false;
public int MemberCount { get; init; }
}

13
Foxcord/Gateway/Events/Dispatch/IDispatch.cs Normal file
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namespace Foxcord.Gateway.Events.Dispatch;
public interface IDispatch
{
}
public static class DispatchEventTypeName
{
public const string Ready = "READY";
public const string GuildCreate = "GUILD_CREATE";
public const string MessageCreate = "MESSAGE_CREATE";
}

8
Foxcord/Gateway/Events/Dispatch/MessageCreateEvent.cs Normal file
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using Foxcord.Models;
namespace Foxcord.Gateway.Events.Dispatch;
public class MessageCreateEvent : Message, IDispatch
{
}

18
Foxcord/Gateway/Events/Dispatch/ReadyEvent.cs Normal file
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using System.Text.Json.Serialization;
using Foxcord.Models;
namespace Foxcord.Gateway.Events.Dispatch;
public class ReadyEvent : IDispatch
{
[JsonPropertyName("v")] public int Version { get; init; }
public required User User { get; init; }
public string? SessionId { get; init; }
public string? ResumeGatewayUrl { get; init; }
[JsonPropertyName("shard")] public int[]? RawShard { private get; init; }
[JsonIgnore] public ShardInfo Shard => new(RawShard?[0] ?? 0, RawShard?[1] ?? 1);
[JsonIgnore] public bool CanResume => !string.IsNullOrEmpty(SessionId) && !string.IsNullOrEmpty(ResumeGatewayUrl);
}
public record ShardInfo(int ShardId, int NumShards);

8
Foxcord/Gateway/Events/DispatchEvent.cs Normal file
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using Foxcord.Gateway.Events.Dispatch;
namespace Foxcord.Gateway.Events;
internal class DispatchEvent : IGatewayEvent
{
public required IDispatch Payload { get; init; }
}

5
Foxcord/Gateway/Events/HeartbeatEvent.cs Normal file
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namespace Foxcord.Gateway.Events;
internal class HeartbeatEvent : IGatewayEvent;
internal class HeartbeatAckEvent : IGatewayEvent;

6
Foxcord/Gateway/Events/HelloEvent.cs Normal file
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namespace Foxcord.Gateway.Events;
internal class HelloEvent : IGatewayEvent
{
public int HeartbeatInterval { get; init; }
}

6
Foxcord/Gateway/Events/IGatewayEvent.cs Normal file
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namespace Foxcord.Gateway.Events;
internal interface IGatewayEvent
{
}

15
Foxcord/Gateway/Events/IdentifyEvent.cs Normal file
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namespace Foxcord.Gateway.Events;
public class IdentifyEvent : IGatewayEvent
{
public required string Token { get; init; }
public IdentifyProperties Properties { get; init; } = new();
public GatewayIntent Intents { get; init; }
}
public class IdentifyProperties
{
public string Os { get; init; } = "Linux";
public string Browser { get; init; } = "Foxcord";
public string Device { get; init; } = "Foxcord";
}

22
Foxcord/Gateway/GatewayIntent.cs Normal file
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namespace Foxcord.Gateway;
[Flags]
public enum GatewayIntent
{
Guilds = 1 << 0,
GuildMembers = 1 << 1,
GuildBans = 1 << 2,
GuildEmojis = 1 << 3,
GuildIntegrations = 1 << 4,
GuildWebhooks = 1 << 5,
GuildInvites = 1 << 6,
GuildVoiceStates = 1 << 7,
GuildPresences = 1 << 8,
GuildMessages = 1 << 9,
GuildMessageReactions = 1 << 10,
GuildMessageTyping = 1 << 11,
DirectMessages = 1 << 12,
DirectMessageReactions = 1 << 13,
DirectMessageTyping = 1 << 14,
MessageContent = 1 << 15,
}

33
Foxcord/Gateway/GatewayPacket.cs Normal file
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using System.Text.Json;
using System.Text.Json.Serialization;
namespace Foxcord.Gateway;
public record GatewayPacket
{
[JsonPropertyName("op")] public GatewayOpcode Opcode { get; init; }
[JsonPropertyName("d")] public object? Payload { get; init; }
[JsonPropertyName("s")]
[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
public int? Sequence { get; init; }
[JsonPropertyName("t")]
[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
public string? EventType { get; init; }
}
public enum GatewayOpcode
{
Dispatch = 0,
Heartbeat = 1,
Identify = 2,
PresenceUpdate = 3,
VoiceStateUpdate = 4,
Resume = 6,
Reconnect = 7,
RequestGuildMembers = 8,
InvalidSession = 9,
Hello = 10,
HeartbeatAck = 11
}

8
Foxcord/Gateway/Types/UnavailableGuild.cs Normal file
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using Foxcord.Models;
namespace Foxcord.Gateway.Types;
public class UnavailableGuild
{
public Snowflake Id { get; init; }
}

7
Foxcord/Models/Guild.cs Normal file
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namespace Foxcord.Models;
public class Guild
{
public Snowflake Id { get; init; }
public string Name { get; init; } = string.Empty;
}

9
Foxcord/Models/Message.cs Normal file
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namespace Foxcord.Models;
public class Message
{
public Snowflake Id { get; init; }
public Snowflake ChannelId { get; init; }
public string Content { get; init; } = string.Empty;
public required User Author { get; init; }
}

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using System.Diagnostics.CodeAnalysis;
using System.Text.Json;
using System.Text.Json.Serialization;
namespace Foxcord.Models;
[JsonConverter(typeof(JsonConverter))]
public readonly struct Snowflake(ulong value) : IEquatable<Snowflake>
{
public const long Epoch = 1_420_070_400_000; // 2015-01-01 at 00:00:00 UTC
public readonly ulong Value = value;
/// <summary>
/// The time this snowflake was created.
/// </summary>
public DateTimeOffset Time => DateTimeOffset.FromUnixTimeMilliseconds(Timestamp);
/// <summary>
/// The Unix timestamp embedded in this snowflake, in milliseconds.
/// </summary>
public long Timestamp => (long)((Value >> 22) + Epoch);
/// <summary>
/// The worker ID embedded in this snowflake.
/// </summary>
public byte WorkerId => (byte)((Value & 0x3E0000) >> 17);
/// <summary>
/// The process ID embedded in this snowflake.
/// </summary>
public byte ProcessId => (byte)((Value & 0x1F000) >> 12);
/// <summary>
/// The increment embedded in this snowflake.
/// </summary>
public short Increment => (short)(Value & 0xFFF);
public static bool operator <(Snowflake arg1, Snowflake arg2) => arg1.Value < arg2.Value;
public static bool operator >(Snowflake arg1, Snowflake arg2) => arg1.Value > arg2.Value;
public static bool operator ==(Snowflake arg1, Snowflake arg2) => arg1.Value == arg2.Value;
public static bool operator !=(Snowflake arg1, Snowflake arg2) => arg1.Value != arg2.Value;
public static implicit operator ulong(Snowflake s) => s.Value;
public static implicit operator long(Snowflake s) => (long)s.Value;
public static implicit operator Snowflake(ulong n) => new(n);
public static implicit operator Snowflake(long n) => new((ulong)n);
public static bool TryParse(string? input, [NotNullWhen(true)] out Snowflake? snowflake)
{
snowflake = null;
if (!ulong.TryParse(input, out var res)) return false;
snowflake = new Snowflake(res);
return true;
}
public override bool Equals(object? obj) => obj is Snowflake other && Value == other.Value;
public bool Equals(Snowflake other)
{
return Value == other.Value;
}
public override int GetHashCode() => Value.GetHashCode();
public override string ToString() => Value.ToString();
public class JsonConverter : JsonConverter<Snowflake>
{
public override Snowflake Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
var raw = reader.GetString();
if (!TryParse(raw, out var snowflake)) throw new FormatException("Snowflake is not a long within a string");
return snowflake.Value;
}
public override void Write(Utf8JsonWriter writer, Snowflake value, JsonSerializerOptions options)
{
writer.WriteStringValue(value.ToString());
}
}
}

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using System.Text.Json.Serialization;
namespace Foxcord.Models;
public class User
{
public Snowflake Id { get; init; }
public required string Username { get; init; }
public required string Discriminator { get; init; }
[JsonIgnore] public string Tag => Discriminator != "0" ? $"{Username}#{Discriminator}" : Username;
public string? GlobalName { get; init; }
public string? Avatar { get; init; }
public string? Banner { get; init; }
public int? AccentColor { get; init; }
public string? Locale { get; init; }
public bool Bot { get; init; } = false;
public bool System { get; init; } = false;
public bool? MfaEnabled { get; init; }
public bool? Verified { get; init; }
public string? Email { get; init; }
}

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using System.Diagnostics;
using System.Net.Http.Headers;
using System.Net.Http.Json;
using System.Text.Json;
using Polly;
using Serilog;
namespace Foxcord.Rest;
public class BaseRestClient
{
public HttpClient Client { get; }
private readonly ILogger _logger;
private readonly JsonSerializerOptions _jsonSerializerOptions;
private readonly Func<string>? _tokenFactory;
private readonly Func<string, string> _pathCleaner;
private readonly Func<HttpResponseMessage, CancellationToken, Task> _errorHandler;
protected ResiliencePipeline<HttpResponseMessage> Pipeline { get; set; } =
new ResiliencePipelineBuilder<HttpResponseMessage>().Build();
private readonly string _apiBaseUrl;
public BaseRestClient(ILogger logger, RestClientOptions options)
{
Client = new HttpClient();
Client.DefaultRequestHeaders.TryAddWithoutValidation("User-Agent", options.UserAgent);
_logger = logger.ForContext<BaseRestClient>();
_jsonSerializerOptions = options.JsonSerializerOptions ?? JsonSerializerOptions.Default;
_apiBaseUrl = options.ApiBaseUrl;
_tokenFactory = options.TokenFactory;
_pathCleaner = options.PathLogCleaner ?? (s => s);
_errorHandler = options.ErrorHandler;
}
public async Task<T> RequestAsync<T>(HttpMethod method, string path, CancellationToken ct = default)
where T : class
{
var req = new HttpRequestMessage(method, $"{_apiBaseUrl}{path}");
if (_tokenFactory != null)
req.Headers.Add("Authorization", _tokenFactory());
var resp = await DoRequestAsync(path, req, ct);
return await resp.Content.ReadFromJsonAsync<T>(_jsonSerializerOptions, ct) ??
throw new DiscordRequestError("Content was deserialized as null");
}
public async Task<TResponse> RequestAsync<TRequest, TResponse>(HttpMethod method, string path, TRequest reqBody,
CancellationToken ct = default)
{
var req = new HttpRequestMessage(method, $"{_apiBaseUrl}{path}");
if (_tokenFactory != null)
req.Headers.Add("Authorization", _tokenFactory());
var body = JsonSerializer.Serialize(reqBody, _jsonSerializerOptions);
req.Content = new StringContent(body, new MediaTypeHeaderValue("application/json", "utf-8"));
var resp = await DoRequestAsync(path, req, ct);
return await resp.Content.ReadFromJsonAsync<TResponse>(_jsonSerializerOptions, ct) ??
throw new DiscordRequestError("Content was deserialized as null");
}
private async Task<HttpResponseMessage> DoRequestAsync(string path, HttpRequestMessage req,
CancellationToken ct = default)
{
var context = ResilienceContextPool.Shared.Get(ct);
context.Properties.Set(new ResiliencePropertyKey<string>("Path"), path);
try
{
return await Pipeline.ExecuteAsync(async ctx =>
{
HttpResponseMessage resp;
var stopwatch = new Stopwatch();
stopwatch.Start();
try
{
resp = await Client.SendAsync(req, HttpCompletionOption.ResponseHeadersRead,
ctx.CancellationToken);
stopwatch.Stop();
}
catch (Exception e)
{
_logger.Error(e, "HTTP error: {Method} {Path}", req.Method, _pathCleaner(path));
throw;
}
_logger.Debug("Response: {Method} {Path} -> {StatusCode} {ReasonPhrase} (in {ResponseMs} ms)",
req.Method, _pathCleaner(path), (int)resp.StatusCode, resp.ReasonPhrase,
stopwatch.ElapsedMilliseconds);
await _errorHandler(resp, context.CancellationToken);
return resp;
}, context);
}
finally
{
ResilienceContextPool.Shared.Return(context);
}
}
}
public class RestClientOptions
{
public JsonSerializerOptions? JsonSerializerOptions { get; init; }
public required string UserAgent { get; init; }
public required string ApiBaseUrl { get; init; }
/// <summary>
/// A function that converts non-2XX responses to errors. This should usually throw;
/// if not, the request will continue to be handled normally, which will probably cause errors.
/// </summary>
public required Func<HttpResponseMessage, CancellationToken, Task> ErrorHandler { get; init; }
/// <summary>
/// A function that returns a token. If not set, the client will not add an Authorization header.
/// </summary>
public Func<string>? TokenFactory { get; init; }
/// <summary>
/// A function that cleans up paths for logging. This should remove sensitive content (i.e. tokens).
/// If not set, paths will not be cleaned before being logged.
/// </summary>
public Func<string, string>? PathLogCleaner { get; init; }
}

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using System.Net;
using System.Net.Http.Json;
using System.Text.Json;
using Foxcord.Models;
using Foxcord.Rest.Rate;
using Foxcord.Rest.Types;
using Foxcord.Serialization;
using Polly;
using Serilog;
namespace Foxcord.Rest;
public class DiscordRestClient : BaseRestClient
{
public DiscordRestClient(ILogger logger, DiscordRestClientOptions options) : base(logger, new RestClientOptions
{
JsonSerializerOptions = JsonSerializerOptions,
ApiBaseUrl = options.ApiBaseUrl ?? DefaultApiBaseUrl,
UserAgent = options.UserAgent ?? DefaultUserAgent,
TokenFactory = () => $"Bot {options.Token}",
ErrorHandler = HandleError,
})
{
Pipeline = new ResiliencePipelineBuilder<HttpResponseMessage>()
.AddDiscordStrategy(new RateLimiter(logger.ForContext<DiscordRestClient>()))
.Build();
}
public const string DefaultUserAgent = "DiscordBot (https://code.vulpine.solutions/sam/Foxcord, v1)";
public const string DefaultApiBaseUrl = "https://discord.com/api/v10";
public async Task<GetGatewayBotResponse> GatewayBotAsync(CancellationToken ct = default) =>
await RequestAsync<GetGatewayBotResponse>(HttpMethod.Get, "/gateway/bot", ct);
public async Task<Message> CreateMessageAsync(Snowflake channelId, CreateMessageParams message,
CancellationToken ct = default) =>
await RequestAsync<CreateMessageParams, Message>(HttpMethod.Post, $"/channels/{channelId}/messages", message,
ct);
#region BaseRestClient parameters
private static readonly JsonSerializerOptions JsonSerializerOptions = JsonSerializerExtensions.CreateSerializer();
private static async Task HandleError(HttpResponseMessage resp, CancellationToken ct)
{
if (resp.IsSuccessStatusCode) return;
if (resp.StatusCode == HttpStatusCode.TooManyRequests)
{
throw new RateLimitError(resp.Headers);
}
var error = await resp.Content.ReadFromJsonAsync<DiscordRestError>(JsonSerializerOptions, ct);
if (error == null) throw new ArgumentNullException(nameof(resp), "Response was deserialized as null");
throw error;
}
#endregion
}
public class DiscordRestClientOptions
{
public required string Token { get; init; }
public string? UserAgent { get; init; }
public string? ApiBaseUrl { get; init; }
}

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using System.Net.Http.Headers;
namespace Foxcord.Rest;
public class DiscordRestError : Exception
{
public required DiscordErrorCode Code { get; init; }
public new required string Message { get; init; }
}
public enum DiscordErrorCode
{
GeneralError = 0,
UnknownAccount = 10001,
}
public class DiscordRequestError(string message) : Exception(message);
public class RateLimitError(HttpHeaders headers) : Exception("Rate limit error")
{
public HttpHeaders Headers { get; } = headers;
}

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using System.Text;
namespace Foxcord.Rest.Rate;
// All of this code is taken from Arikawa:
// https://github.com/diamondburned/arikawa/blob/v3/api/rate/rate.go
internal static class BucketKeyUtils
{
private static readonly string[] MajorRootPaths = ["channels", "guilds"];
internal static string Parse(string path)
{
path = path.Split("?", 2)[0];
var parts = path.Split("/");
if (parts.Length == 0) return path;
parts = parts.Skip(1).ToArray();
var skip = 0;
if (MajorRootPaths.Contains(parts[0])) skip = 2;
skip++;
for (; skip < parts.Length; skip += 2)
{
if (long.TryParse(parts[skip], out _) || StringIsEmojiOnly(parts[skip]) || StringIsCustomEmoji(parts[skip]))
parts[skip] = "";
}
path = string.Join("/", parts);
return $"/{path}";
}
private static bool StringIsCustomEmoji(string emoji)
{
var parts = emoji.Split(":");
if (parts.Length != 2) return false;
if (!long.TryParse(parts[1], out _)) return false;
if (parts[0].Contains(' ')) return false;
return true;
}
private static bool StringIsEmojiOnly(string emoji)
{
var runes = emoji.EnumerateRunes().ToArray();
switch (runes.Length)
{
case 0:
return false;
case 1:
case 2:
return EmojiRune(runes[0]);
}
return false;
}
private static bool EmojiRune(Rune r)
{
if (r == new Rune('\u00a9') || r == new Rune('\u00ae') ||
(r >= new Rune('\u2000') && r <= new Rune('\u3300'))) return true;
return false;
}
}

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using Polly;
namespace Foxcord.Rest.Rate;
public class DiscordResilienceStrategy(RateLimiter rateLimiter)
: ResilienceStrategy<HttpResponseMessage>
{
protected override async ValueTask<Outcome<HttpResponseMessage>> ExecuteCore<TState>(
Func<ResilienceContext, TState, ValueTask<Outcome<HttpResponseMessage>>> callback, ResilienceContext context,
TState state)
{
var path = context.Properties.GetValue(new ResiliencePropertyKey<string>("Path"), string.Empty);
if (path == string.Empty) throw new DiscordRequestError("Path was not set in Polly context");
var b = await rateLimiter.LockBucket(BucketKeyUtils.Parse(path), context.CancellationToken);
var response = await callback(context, state).ConfigureAwait(context.ContinueOnCapturedContext);
if (response.Exception is RateLimitError rateLimitError)
b.Release(rateLimitError.Headers);
else if (response.Result != null)
b.Release(response.Result.Headers);
return response;
}
}
public class DiscordResilienceStrategyOptions : ResilienceStrategyOptions;
public static class DiscordResilienceStrategyExtensions
{
public static ResiliencePipelineBuilder<HttpResponseMessage> AddDiscordStrategy(
this ResiliencePipelineBuilder<HttpResponseMessage> builder, RateLimiter rateLimiter) =>
builder.AddStrategy(_ => new DiscordResilienceStrategy(rateLimiter), new DiscordResilienceStrategyOptions());
}

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using System.Collections.Concurrent;
using System.Globalization;
using System.Net.Http.Headers;
using Serilog;
namespace Foxcord.Rest.Rate;
// Most of this code is taken from discordgo:
// https://github.com/bwmarrin/discordgo/blob/master/ratelimit.go
public class RateLimiter(ILogger logger)
{
private readonly ILogger _logger = logger.ForContext<RateLimiter>();
private readonly ConcurrentDictionary<string, Bucket> _buckets = new();
private readonly ConcurrentDictionary<string, CustomRateLimit> _customRateLimits = new([
new KeyValuePair<string, CustomRateLimit>("//reactions//", new CustomRateLimit
{
Requests = 1,
Reset = TimeSpan.FromMilliseconds(200)
})
]);
internal long Global;
internal Bucket GetBucket(string key)
{
key = BucketKeyUtils.Parse(key);
var bucket = _buckets.GetOrAdd(key, _ => new Bucket
{
Key = key,
Remaining = 1,
RateLimiter = this,
Logger = _logger
});
if (_customRateLimits.Any(r => key.EndsWith(r.Key)))
bucket.CustomRateLimit = _customRateLimits.First(r => key.EndsWith(r.Key)).Value;
return bucket;
}
internal TimeSpan GetWaitTime(Bucket b, int minRemaining)
{
if (b.Remaining < minRemaining && b.Reset > DateTimeOffset.UtcNow)
return b.Reset - DateTimeOffset.UtcNow;
var sleepTo = DateTimeOffset.FromUnixTimeMilliseconds(Global);
if (sleepTo > DateTimeOffset.UtcNow)
return sleepTo - DateTimeOffset.UtcNow;
return TimeSpan.Zero;
}
internal async Task<Bucket> LockBucket(string bucketId, CancellationToken ct = default) =>
await LockBucket(GetBucket(bucketId), ct);
internal async Task<Bucket> LockBucket(Bucket b, CancellationToken ct = default)
{
_logger.Verbose("Locking bucket {Bucket}", b.Key);
await b.Semaphore.WaitAsync(ct);
var waitTime = GetWaitTime(b, 1);
if (waitTime > TimeSpan.Zero) await Task.Delay(waitTime, ct);
b.Remaining--;
_logger.Verbose("Letting request for bucket {Bucket} through", b.Key);
return b;
}
}
internal class CustomRateLimit
{
internal int Requests;
internal TimeSpan Reset;
}
internal class Bucket
{
internal readonly SemaphoreSlim Semaphore = new(1);
internal required string Key;
internal required ILogger Logger { private get; init; }
internal int Remaining;
internal DateTimeOffset Reset;
private DateTimeOffset _lastReset;
internal CustomRateLimit? CustomRateLimit;
internal required RateLimiter RateLimiter;
// discordgo mentions that this is required to prevent 429s, I trust that
private static readonly TimeSpan ExtraResetTime = TimeSpan.FromMilliseconds(250);
internal void Release(HttpHeaders headers)
{
try
{
if (CustomRateLimit != null)
{
if (DateTimeOffset.UtcNow - _lastReset >= CustomRateLimit.Reset)
{
Remaining = CustomRateLimit.Requests - 1;
_lastReset = DateTimeOffset.UtcNow;
}
if (Remaining < 1)
{
Reset = DateTimeOffset.UtcNow + CustomRateLimit.Reset;
}
return;
}
var remaining = TryGetHeaderValue(headers, "X-RateLimit-Remaining");
var reset = TryGetHeaderValue(headers, "X-RateLimit-Reset");
var global = TryGetHeaderValue(headers, "X-RateLimit-Global");
var resetAfter = TryGetHeaderValue(headers, "X-RateLimit-Reset-After");
if (resetAfter != null)
{
if (!double.TryParse(resetAfter, out var parsedResetAfter))
throw new InvalidRateLimitHeaderException("X-RateLimit-Reset-After was not a valid double");
var resetAt = DateTimeOffset.UtcNow + TimeSpan.FromSeconds(parsedResetAfter);
if (global != null) RateLimiter.Global = resetAt.ToUnixTimeMilliseconds();
else Reset = resetAt;
}
else if (reset != null)
{
var dateHeader = TryGetHeaderValue(headers, "Date");
if (dateHeader == null) throw new InvalidRateLimitHeaderException("Date header was not set");
if (!DateTimeOffset.TryParseExact(dateHeader, "r", CultureInfo.InvariantCulture,
DateTimeStyles.AssumeUniversal, out var parsedDate))
throw new InvalidRateLimitHeaderException("Date was not a valid date");
if (!long.TryParse(reset, out var parsedReset))
throw new InvalidRateLimitHeaderException("X-RateLimit-Reset was not a valid long");
var delta = DateTimeOffset.FromUnixTimeMilliseconds(parsedReset) - parsedDate + ExtraResetTime;
Reset = DateTimeOffset.UtcNow + delta;
}
if (remaining == null) return;
if (!int.TryParse(remaining, out var parsedRemaining))
throw new InvalidRateLimitHeaderException("X-RateLimit-Remaining was not a valid integer");
Remaining = parsedRemaining;
Logger.Verbose("New remaining for bucket {Bucket} is {Remaining}", Key, Remaining);
}
finally
{
Logger.Verbose("Releasing bucket {Bucket}", Key);
Semaphore.Release();
}
}
private static string? TryGetHeaderValue(HttpHeaders headers, string key) =>
headers.TryGetValues(key, out var values) ? values.FirstOrDefault() : null;
}
public class InvalidRateLimitHeaderException(string message) : Exception(message);

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namespace Foxcord.Rest.Types;
public record CreateMessageParams(
string? Content = null,
object? Nonce = null,
bool Tts = false);

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namespace Foxcord.Rest.Types;
public record GetGatewayBotResponse(string Url, int Shards, SessionStartLimit SessionStartLimit);
public record SessionStartLimit(int Total, int Remaining, int ResetAfter, int MaxConcurrency);

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using System.Text.Json;
using System.Text.Json.Serialization;
namespace Foxcord.Serialization;
public static class JsonSerializerExtensions
{
public static JsonSerializerOptions CreateSerializer()
{
var opts = new JsonSerializerOptions
{
PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower,
NumberHandling = JsonNumberHandling.AllowReadingFromString,
IncludeFields = true
};
return opts;
}
}

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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<ProjectReference Include="..\Foxcord\Foxcord.csproj" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="Serilog" Version="4.0.1" />
<PackageReference Include="Serilog.Sinks.Console" Version="6.0.0" />
</ItemGroup>
</Project>

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using Foxcord.Gateway;
using Serilog;
using Foxcord.Rest;
Log.Logger = new LoggerConfiguration()
.MinimumLevel.Verbose()
.WriteTo.Console()
.CreateLogger();
var client = new DiscordRestClient(Log.Logger, new DiscordRestClientOptions
{
Token = Environment.GetEnvironmentVariable("TOKEN")!
});
var gatewayBot = await client.GatewayBotAsync();
var gateway = new DiscordGatewayClient(Log.Logger, new DiscordGatewayClientOptions
{
Token = Environment.GetEnvironmentVariable("TOKEN")!,
Uri = gatewayBot.Url,
Intents = GatewayIntent.Guilds | GatewayIntent.GuildMessages | GatewayIntent.MessageContent
});
await gateway.ConnectAsync();
await Task.Delay(-1);

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# Foxcord
yet another c# discord library, because i want to suffer
## Acknowledgements
- a handful of functions were taken from [Myriad](https://github.com/PluralKit/PluralKit/tree/main/Myriad), especially
related to websocket reading/writing
- the ratelimit code is a mix of [discordgo](https://github.com/bwmarrin/discordgo)
and [arikawa](https://github.com/diamondburned/arikawa/tree/v3). not the best porting job ever, that's for sure
## License
\*pulls out a copy of the GNU LGPL, but with a giant "PLEASE DON'T USE THIS" sticker slapped on top of it\*