Merge branch 'dev' into patches/nested-channel-invite

CHANGELOG.md

@@ -0,0 +1,76 @@
+# Changelog
+
+## [Unreleased]
+### Added
+
+- #747: `CommandService` now has a `CommandExecuted` event (e991715)
+- #765: Parameters may have a name specified via `NameAttribute` (9c81ab9)
+- #773: Both socket clients inherit from `BaseSocketClient` (9b7afec)
+- #785: Primitives now automatically load a NullableTypeReader (cb0ff78)
+- #819: Support for Welcome Message channels (30e867a)
+- #835: Emoji may now be managed from a bot (b4bf046)
+- #843: Webhooks may now be managed from a bot (7b2ddd0)
+- #863: An embed may be converted to an `EmbedBuilder` using the `.ToEmbedBuilder()` method (5218e6b)
+- #877: Support for reading rich presences (34b4e5a)
+- #888: Users may now opt-in to using a proxy (678a723)
+- #906: API Analyzers to assist users when writing their bot (f69ef2a)
+- #907: Full support for channel categories (030422f)
+- #913: Animated emoji may be read and written (a19ff18)
+- #915: Unused parameters may be discarded, rather than failing the command (5f46aef)
+- #929: Standard EqualityComparers for use in LINQ operations with the library's entities (b5e7548)
+- 'html' variant added to the `EmbedType` enum (42c879c)
+
+### Fixed
+- #742: `DiscordShardedClient#GetGuildFor` will now direct null guilds to Shard 0 (d5e9d6f)
+- #743: Various issues with permissions and inheritance of permissions (f996338)
+- #755: `IRole.Mention` will correctly tag the @everyone role (6b5a6e7)
+- #768: `CreateGuildAsync` will include the icon stream (865080a)
+- #866: Revised permissions constants and behavior (dec7cb2)
+- #872: Bulk message deletion should no longer fail for incomplete batch sizes (804d918)
+- #923: A null value should properly reset a user's nickname (227f61a)
+- #938: The reconnect handler should no longer deadlock during Discord outages (73ac9d7)
+- Ignore messages with no ID in bulk delete (676be40)
+
+### Changed
+- #731: `IUserMessage#GetReactionUsersAsync` now takes an `IEmote` instead of a `string` (5d7f2fc)
+- #744: IAsyncEnumerable has been redesigned (5bbd9bb)
+- #777: `IGuild#DefaultChannel` will now resolve the first accessible channel, per changes to Discord (1ffcd4b)
+- #781: Attempting to add or remove a member's EveryoneRole will throw (506a6c9)
+- #801: `EmbedBuilder` will no longer implicitly convert to `Embed`, you must build manually (94f7dd2)
+- #804: Command-related tasks will have the 'async' suffix (14fbe40)
+- #812: The WebSocket4Net provider has been bumped to version 0.15, allowing support for .NET Standard apps (e25054b)
+- #829: DeleteMessagesAsync moved from IMessageChannel to ITextChannel (e00f17f)
+- #853: WebSocket will now use `zlib-stream` compression (759db34)
+- #874: The `ReadMessages` permission is moving to `ViewChannel` (edfbd05)
+- #877: Refactored Games into Activities (34b4e5a)
+- `IGuildChannel#Nsfw` moved to `ITextChannel`, now maps to the API property (608bc35)
+- Preemptive ratelimits are now logged under verbose, rather than warning. (3c1e766)
+- The default InviteAge when creating Invites is now 24 hours (9979a02)
+
+
+### Removed
+- #790: Redundant overloads for `AddField` removed from EmbedBuilder (479361b)
+- #925: RPC is no longer being maintained nor packaged (b30af57)
+- User logins (including selfbots) are no longer supported (fc5adca)
+
+### Misc
+- This project is now licensed to the Discord.Net contributors (710e182)
+- #786: Unit tests for the Color structure (22b969c)
+- #828: We now include a contributing guide (cd82a0f)
+- #876: We now include a standard editorconfig (5c8c784)
+
+## [1.0.2] - 2017-09-09
+### Fixed
+
+- Guilds utilizing Channel Categories will no longer crash bots on the `READY` event.
+
+## [1.0.1] - 2017-07-05
+### Fixed
+
+- #732: Fixed parameter preconditions not being loaded from class-based modules (b6dcc9e)
+- #726: Fixed CalculateScore throwing an ArgumentException for missing parameters (7597cf5)
+- EmbedBuilder URI validation should no longer throw NullReferenceExceptions in certain edge cases (d89804d)
+- Fixed module auto-detection for nested modules (d2afb06)
+
+### Changed
+- ShardedCommandContext now inherits from SocketCommandContext (8cd99be)

Discord.Net.sln

@@ -26,10 +26,12 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Discord.Net.Analyzers", "sr
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Samples", "Samples", "{BB59D5B5-E7B0-4BF4-8F82-D14431B2799B}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "01_basic_ping_bot", "samples\01_basic_ping_bot\01_basic_ping_bot.csproj", "{F2FF84FB-F6AD-47E5-9EE5-18206CAE136E}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "01_basic_ping_bot", "samples\01_basic_ping_bot\01_basic_ping_bot.csproj", "{F2FF84FB-F6AD-47E5-9EE5-18206CAE136E}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "02_commands_framework", "samples\02_commands_framework\02_commands_framework.csproj", "{4E1F1F40-B1DD-40C9-A4B1-A2046A4C9C76}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "03_sharded_client", "samples\03_sharded_client\03_sharded_client.csproj", "{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -160,6 +162,18 @@ Global
 		{4E1F1F40-B1DD-40C9-A4B1-A2046A4C9C76}.Release|x64.Build.0 = Release|Any CPU
 		{4E1F1F40-B1DD-40C9-A4B1-A2046A4C9C76}.Release|x86.ActiveCfg = Release|Any CPU
 		{4E1F1F40-B1DD-40C9-A4B1-A2046A4C9C76}.Release|x86.Build.0 = Release|Any CPU
+		{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26}.Debug|x64.Build.0 = Debug|Any CPU
+		{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26}.Debug|x86.Build.0 = Debug|Any CPU
+		{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26}.Release|Any CPU.Build.0 = Release|Any CPU
+		{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26}.Release|x64.ActiveCfg = Release|Any CPU
+		{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26}.Release|x64.Build.0 = Release|Any CPU
+		{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26}.Release|x86.ActiveCfg = Release|Any CPU
+		{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -173,6 +187,7 @@ Global
 		{BBA8E7FB-C834-40DC-822F-B112CB7F0140} = {CC3D4B1C-9DE0-448B-8AE7-F3F1F3EC5C3A}
 		{F2FF84FB-F6AD-47E5-9EE5-18206CAE136E} = {BB59D5B5-E7B0-4BF4-8F82-D14431B2799B}
 		{4E1F1F40-B1DD-40C9-A4B1-A2046A4C9C76} = {BB59D5B5-E7B0-4BF4-8F82-D14431B2799B}
+		{9B4C4AFB-3D15-44C6-9E36-12ED625AAA26} = {BB59D5B5-E7B0-4BF4-8F82-D14431B2799B}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {D2404771-EEC8-45F2-9D71-F3373F6C1495}

docs/faq/basics/client-basics.md

@@ -63,4 +63,32 @@ use the cached message entity. Read more about it [here](xref:Guides.Concepts.Ev
 
 [MessageCacheSize]: xref:Discord.WebSocket.DiscordSocketConfig.MessageCacheSize
 [DiscordSocketConfig]: xref:Discord.WebSocket.DiscordSocketConfig
-[MessageUpdated]: xref:Discord.WebSocket.BaseSocketClient.MessageUpdated
+[MessageUpdated]: xref:Discord.WebSocket.BaseSocketClient.MessageUpdated
+
+## What is a shard/sharded client, and how is it different from the `DiscordSocketClient`?
+As your bot grows in popularity, it is recommended that you should section your bot off into separate processes.
+The [DiscordShardedClient] is essentially a class that allows you to easily create and manage multiple [DiscordSocketClient]
+instances, with each one serving a different amount of guilds.
+
+There are very few differences from the [DiscordSocketClient] class, and it is very straightforward
+to modify your existing code to use a [DiscordShardedClient] when necessary.
+
+1. You need to specify the total amount of shards, or shard ids, via [DiscordShardedClient]'s constructors.
+2. The [Connected], [Disconnected], [Ready], and [LatencyUpdated] events
+ are replaced with [ShardConnected], [ShardDisconnected], [ShardReady], and [ShardLatencyUpdated].
+3. Every event handler you apply/remove to the [DiscordShardedClient] is applied/removed to each shard.
+ If you wish to control a specific shard's events, you can access an individual shard through the `Shards` property.
+
+If you do not wish to use the [DiscordShardedClient] and instead reuse the same [DiscordSocketClient] code and manually shard them,
+you can do so by specifying the [ShardId] for the [DiscordSocketConfig] and pass that to the [DiscordSocketClient]'s constructor.
+
+[DiscordSocketClient]: xref:Discord.WebSocket.DiscordSocketClient
+[DiscordShardedClient]: xref:Discord.WebSocket.DiscordShardedClient
+[Connected]: xref:Discord.WebSocket.DiscordSocketClient.Connected
+[Disconnected]: xref:Discord.WebSocket.DiscordSocketClient.Disconnected
+[LatencyUpdated]: xref:Discord.WebSocket.DiscordSocketClient.LatencyUpdated
+[ShardConnected]: xref:Discord.WebSocket.DiscordShardedClient.ShardConnected
+[ShardDisconnected]: xref:Discord.WebSocket.DiscordShardedClient.ShardDisconnected
+[ShardReady]: xref:Discord.WebSocket.DiscordShardedClient.ShardReady
+[ShardLatencyUpdated]: xref:Discord.WebSocket.DiscordShardedClient.ShardLatencyUpdated
+[ShardId]: xref:Discord.WebSocket.DiscordSocketConfig.ShardId

docs/guides/commands/samples/intro/command_handler.cs

@@ -35,9 +35,10 @@ public class CommandHandler
         // Create a number to track where the prefix ends and the command begins
         int argPos = 0;
 
-        // Determine if the message is a command based on the prefix
+        // Determine if the message is a command based on the prefix and make sure no bots trigger commands
         if (!(message.HasCharPrefix('!', ref argPos) || 
-            message.HasMentionPrefix(_client.CurrentUser, ref argPos)))
+            message.HasMentionPrefix(_client.CurrentUser, ref argPos)) ||
+            message.Author.IsBot)
             return;
 
         // Create a WebSocket-based command context based on the message
@@ -60,4 +61,4 @@ public class CommandHandler
         // if (!result.IsSuccess)
         // await context.Channel.SendMessageAsync(result.ErrorReason);
     }
-}
+}

docs/guides/commands/samples/post-execution/command_executed_demo.cs

@@ -27,7 +27,7 @@ public async Task HandleCommandAsync(SocketMessage msg)
     var message = messageParam as SocketUserMessage;
     if (message == null) return;
     int argPos = 0;
-    if (!(message.HasCharPrefix('!', ref argPos) || message.HasMentionPrefix(_client.CurrentUser, ref argPos))) return;
+    if (!(message.HasCharPrefix('!', ref argPos) || message.HasMentionPrefix(_client.CurrentUser, ref argPos)) || message.Author.IsBot) return;
     var context = new SocketCommandContext(_client, message);
     var result = await _commands.ExecuteAsync(context, argPos, _services);
     // Optionally, you may pass the result manually into your
@@ -35,4 +35,4 @@ public async Task HandleCommandAsync(SocketMessage msg)
     // precondition failures in the same method.
 
     // await OnCommandExecutedAsync(null, context, result);
-}
+}

docs/guides/voice/samples/joining_audio.cs

@@ -1,4 +1,5 @@
-[Command("join")]
+// The command's Run Mode MUST be set to RunMode.Async, otherwise, being connected to a voice channel will block the gateway thread.
+[Command("join", RunMode = RunMode.Async)] 
 public async Task JoinChannel(IVoiceChannel channel = null)
 {
     // Get the audio channel

docs/guides/voice/sending-voice.md

@@ -11,16 +11,16 @@ Information is not guaranteed to be accurate.
 
 ## Installing
 
-Audio requires two native libraries, `libsodium` and `opus`. 
-Both of these libraries must be placed in the runtime directory of your 
-bot. (When developing on .NET Framework, this would be `bin/debug`, 
-when developing on .NET Core, this is where you execute `dotnet run` 
+Audio requires two native libraries, `libsodium` and `opus`.
+Both of these libraries must be placed in the runtime directory of your
+bot. (When developing on .NET Framework, this would be `bin/debug`,
+when developing on .NET Core, this is where you execute `dotnet run`
 from; typically the same directory as your csproj).
 
-For Windows Users, precompiled binaries are available for your 
+For Windows Users, precompiled binaries are available for your
 convienence [here](https://discord.foxbot.me/binaries/).
 
-For Linux Users, you will need to compile [Sodium] and [Opus] from 
+For Linux Users, you will need to compile [Sodium] and [Opus] from
 source, or install them from your package manager.
 
 [Sodium]: https://download.libsodium.org/libsodium/releases/
@@ -28,7 +28,7 @@ source, or install them from your package manager.
 
 ## Joining a Channel
 
-Joining a channel is the first step to sending audio, and will return 
+Joining a channel is the first step to sending audio, and will return
 an [IAudioClient] to send data with.
 
 To join a channel, simply await [ConnectAsync] on any instance of an
@@ -36,67 +36,76 @@ To join a channel, simply await [ConnectAsync] on any instance of an
 
 [!code-csharp[Joining a Channel](samples/joining_audio.cs)]
 
-The client will sustain a connection to this channel until it is 
+>[!WARNING]
+>Commands which mutate voice states, such as those where you join/leave
+>an audio channel, or send audio, should use [RunMode.Async]. RunMode.Async
+>is necessary to prevent a feedback loop which will deadlock clients
+>in their default configuration. If you know that you're running your
+>commands in a different task than the gateway task, RunMode.Async is
+>not required.
+
+The client will sustain a connection to this channel until it is
 kicked, disconnected from Discord, or told to disconnect.
 
-It should be noted that voice connections are created on a per-guild 
-basis; only one audio connection may be open by the bot in a single 
-guild. To switch channels within a guild, invoke [ConnectAsync] on 
+It should be noted that voice connections are created on a per-guild
+basis; only one audio connection may be open by the bot in a single
+guild. To switch channels within a guild, invoke [ConnectAsync] on
 another voice channel in the guild.
 
 [IAudioClient]: xref:Discord.Audio.IAudioClient
 [ConnectAsync]: xref:Discord.IAudioChannel.ConnectAsync*
+[RunMode.Async]: xref:Discord.Commands.RunMode
 
 ## Transmitting Audio
 
 ### With FFmpeg
 
-[FFmpeg] is an open source, highly versatile AV-muxing tool. This is 
+[FFmpeg] is an open source, highly versatile AV-muxing tool. This is
 the recommended method of transmitting audio.
 
-Before you begin, you will need to have a version of FFmpeg downloaded 
-and placed somewhere in your PATH (or alongside the bot, in the same 
-location as libsodium and opus). Windows binaries are available on 
+Before you begin, you will need to have a version of FFmpeg downloaded
+and placed somewhere in your PATH (or alongside the bot, in the same
+location as libsodium and opus). Windows binaries are available on
 [FFmpeg's download page].
 
 [FFmpeg]: https://ffmpeg.org/
 [FFmpeg's download page]: https://ffmpeg.org/download.html
 
-First, you will need to create a Process that starts FFmpeg. An 
-example of how to do this is included below, though it is important 
+First, you will need to create a Process that starts FFmpeg. An
+example of how to do this is included below, though it is important
 that you return PCM at 48000hz.
 
 >[!NOTE]
->As of the time of this writing, Discord.Audio struggles significantly 
->with processing audio that is already opus-encoded; you will need to 
+>As of the time of this writing, Discord.Audio struggles significantly
+>with processing audio that is already opus-encoded; you will need to
 >use the PCM write streams.
 
 [!code-csharp[Creating FFmpeg](samples/audio_create_ffmpeg.cs)]
 
-Next, to transmit audio from FFmpeg to Discord, you will need to 
-pull an [AudioOutStream] from your [IAudioClient]. Since we're using 
+Next, to transmit audio from FFmpeg to Discord, you will need to
+pull an [AudioOutStream] from your [IAudioClient]. Since we're using
 PCM audio, use [IAudioClient.CreatePCMStream].
 
-The sample rate argument doesn't particularly matter, so long as it is 
-a valid rate (120, 240, 480, 960, 1920, or 2880). For the sake of 
+The sample rate argument doesn't particularly matter, so long as it is
+a valid rate (120, 240, 480, 960, 1920, or 2880). For the sake of
 simplicity, I recommend using 1920.
 
-Channels should be left at `2`, unless you specified a different value 
+Channels should be left at `2`, unless you specified a different value
 for `-ac 2` when creating FFmpeg.
 
 [AudioOutStream]: xref:Discord.Audio.AudioOutStream
 [IAudioClient.CreatePCMStream]: xref:Discord.Audio.IAudioClient#Discord_Audio_IAudioClient_CreateDirectPCMStream_Discord_Audio_AudioApplication_System_Nullable_System_Int32__System_Int32_
 
-Finally, audio will need to be piped from FFmpeg's stdout into your 
-AudioOutStream. This step can be as complex as you'd like it to be, but 
-for the majority of cases, you can just use [Stream.CopyToAsync], as 
+Finally, audio will need to be piped from FFmpeg's stdout into your
+AudioOutStream. This step can be as complex as you'd like it to be, but
+for the majority of cases, you can just use [Stream.CopyToAsync], as
 shown below.
 
 [Stream.CopyToAsync]: https://msdn.microsoft.com/en-us/library/hh159084(v=vs.110).aspx
 
-If you are implementing a queue for sending songs, it's likely that 
-you will want to wait for audio to stop playing before continuing on 
-to the next song. You can await `AudioOutStream.FlushAsync` to wait for 
+If you are implementing a queue for sending songs, it's likely that
+you will want to wait for audio to stop playing before continuing on
+to the next song. You can await `AudioOutStream.FlushAsync` to wait for
 the audio client's internal buffer to clear out.
 
 [!code-csharp[Sending Audio](samples/audio_ffmpeg.cs)]

samples/02_commands_framework/Services/CommandHandlingService.cs

@@ -20,6 +20,8 @@ namespace _02_commands_framework.Services
             _discord = services.GetRequiredService<DiscordSocketClient>();
             _services = services;
 
+            _commands.CommandExecuted += CommandExecutedAsync;
+            _commands.Log += LogAsync;
             _discord.MessageReceived += MessageReceivedAsync;
         }
 
@@ -39,11 +41,28 @@ namespace _02_commands_framework.Services
             if (!message.HasMentionPrefix(_discord.CurrentUser, ref argPos)) return;
 
             var context = new SocketCommandContext(_discord, message);
-            var result = await _commands.ExecuteAsync(context, argPos, _services);
+            await _commands.ExecuteAsync(context, argPos, _services); // we will handle the result in CommandExecutedAsync
+        }
+
+        public async Task CommandExecutedAsync(Optional<CommandInfo> command, ICommandContext context, IResult result)
+        {
+            // command is unspecified when there was a search failure (command not found); we don't care about these errors
+            if (!command.IsSpecified)
+                return;
+
+            // the command was succesful, we don't care about this result, unless we want to log that a command succeeded.
+            if (result.IsSuccess)
+                return;
+
+            // the command failed, let's notify the user that something happened.
+            await context.Channel.SendMessageAsync($"error: {result.ToString()}");
+        }
+
+        private Task LogAsync(LogMessage log)
+        {
+            Console.WriteLine(log.ToString());
 
-            if (result.Error.HasValue &&
-                result.Error.Value != CommandError.UnknownCommand) // it's bad practice to send 'unknown command' errors
-                await context.Channel.SendMessageAsync(result.ToString());
+            return Task.CompletedTask;
         }
     }
 }

samples/03_sharded_client/03_sharded_client.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <RootNamespace>_03_sharded_client</RootNamespace>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\Discord.Net.Commands\Discord.Net.Commands.csproj" />
+    <ProjectReference Include="..\..\src\Discord.Net.WebSocket\Discord.Net.WebSocket.csproj" />
+  </ItemGroup>
+
+</Project>

samples/03_sharded_client/Modules/PublicModule.cs

@@ -0,0 +1,17 @@
+using System.Threading.Tasks;
+using Discord.Commands;
+
+namespace _03_sharded_client.Modules
+{
+    // Remember to make your module reference the ShardedCommandContext
+    public class PublicModule : ModuleBase<ShardedCommandContext>
+    {
+        [Command("info")]
+        public async Task InfoAsync()
+        {
+            var msg = $@"Hi {Context.User}! There are currently {Context.Client.Shards} shards!
+                This guild is being served by shard number {Context.Client.GetShardFor(Context.Guild).ShardId}";
+            await ReplyAsync(msg);
+        }
+    }
+}

samples/03_sharded_client/Program.cs

@@ -0,0 +1,69 @@
+using System;
+using System.Threading.Tasks;
+using _03_sharded_client.Services;
+using Discord;
+using Discord.Commands;
+using Discord.WebSocket;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace _03_sharded_client
+{
+    // This is a minimal example of using Discord.Net's Sharded Client
+    // The provided DiscordShardedClient class simplifies having multiple
+    // DiscordSocketClient instances (or shards) to serve a large number of guilds.
+    class Program
+    {
+        private DiscordShardedClient _client;
+
+        static void Main(string[] args)
+            => new Program().MainAsync().GetAwaiter().GetResult();
+        public async Task MainAsync()
+        {
+            // You specify the amount of shards you'd like to have with the
+            // DiscordSocketConfig. Generally, it's recommended to 
+            // have 1 shard per 1500-2000 guilds your bot is in.
+            var config = new DiscordSocketConfig
+            {
+                TotalShards = 2
+            };
+
+            _client = new DiscordShardedClient(config);
+            var services = ConfigureServices();
+
+            // The Sharded Client does not have a Ready event.
+            // The ShardReady event is used instead, allowing for individual
+            // control per shard.
+            _client.ShardReady += ReadyAsync;
+            _client.Log += LogAsync;
+
+            await services.GetRequiredService<CommandHandlingService>().InitializeAsync();
+
+            await _client.LoginAsync(TokenType.Bot, Environment.GetEnvironmentVariable("token"));
+            await _client.StartAsync();
+
+            await Task.Delay(-1);
+        }
+
+        private IServiceProvider ConfigureServices()
+        {
+            return new ServiceCollection()
+                .AddSingleton(_client)
+                .AddSingleton<CommandService>()
+                .AddSingleton<CommandHandlingService>()
+                .BuildServiceProvider();
+        }
+
+
+        private Task ReadyAsync(DiscordSocketClient shard)
+        {
+            Console.WriteLine($"Shard Number {shard.ShardId} is connected and ready!");
+            return Task.CompletedTask;
+        }
+
+        private Task LogAsync(LogMessage log)
+        {
+            Console.WriteLine(log.ToString());
+            return Task.CompletedTask;
+        }
+    }
+}

samples/03_sharded_client/Services/CommandHandlingService.cs

@@ -0,0 +1,72 @@
+using System;
+using System.Reflection;
+using System.Threading.Tasks;
+using Microsoft.Extensions.DependencyInjection;
+using Discord;
+using Discord.Commands;
+using Discord.WebSocket;
+
+namespace _03_sharded_client.Services
+{
+    public class CommandHandlingService
+    {
+        private readonly CommandService _commands;
+        private readonly DiscordShardedClient _discord;
+        private readonly IServiceProvider _services;
+
+        public CommandHandlingService(IServiceProvider services)
+        {
+            _commands = services.GetRequiredService<CommandService>();
+            _discord = services.GetRequiredService<DiscordShardedClient>();
+            _services = services;
+
+            _commands.CommandExecuted += CommandExecutedAsync;
+            _commands.Log += LogAsync;
+            _discord.MessageReceived += MessageReceivedAsync;
+        }
+
+        public async Task InitializeAsync()
+        {
+            await _commands.AddModulesAsync(Assembly.GetEntryAssembly(), _services);
+        }
+
+        public async Task MessageReceivedAsync(SocketMessage rawMessage)
+        {
+            // Ignore system messages, or messages from other bots
+            if (!(rawMessage is SocketUserMessage message))
+                return;
+            if (message.Source != MessageSource.User)
+                return;
+
+            // This value holds the offset where the prefix ends
+            var argPos = 0;
+            if (!message.HasMentionPrefix(_discord.CurrentUser, ref argPos))
+                return;
+
+            // A new kind of command context, ShardedCommandContext can be utilized with the commands framework
+            var context = new ShardedCommandContext(_discord, message);
+            await _commands.ExecuteAsync(context, argPos, _services);
+        }
+
+        public async Task CommandExecutedAsync(Optional<CommandInfo> command, ICommandContext context, IResult result)
+        {
+            // command is unspecified when there was a search failure (command not found); we don't care about these errors
+            if (!command.IsSpecified)
+                return;
+
+            // the command was succesful, we don't care about this result, unless we want to log that a command succeeded.
+            if (result.IsSuccess)
+                return;
+
+            // the command failed, let's notify the user that something happened.
+            await context.Channel.SendMessageAsync($"error: {result.ToString()}");
+        }
+
+        private Task LogAsync(LogMessage log)
+        {
+            Console.WriteLine(log.ToString());
+
+            return Task.CompletedTask;
+        }
+    }
+}

src/Discord.Net.Commands/CommandService.cs

@@ -49,8 +49,8 @@ namespace Discord.Commands
         ///         Should the command encounter any of the aforementioned error, this event will not be raised.
         ///     </para>
         /// </remarks>
-        public event Func<CommandInfo, ICommandContext, IResult, Task> CommandExecuted { add { _commandExecutedEvent.Add(value); } remove { _commandExecutedEvent.Remove(value); } }
-        internal readonly AsyncEvent<Func<CommandInfo, ICommandContext, IResult, Task>> _commandExecutedEvent = new AsyncEvent<Func<CommandInfo, ICommandContext, IResult, Task>>();
+        public event Func<Optional<CommandInfo>, ICommandContext, IResult, Task> CommandExecuted { add { _commandExecutedEvent.Add(value); } remove { _commandExecutedEvent.Remove(value); } }
+        internal readonly AsyncEvent<Func<Optional<CommandInfo>, ICommandContext, IResult, Task>> _commandExecutedEvent = new AsyncEvent<Func<Optional<CommandInfo>, ICommandContext, IResult, Task>>();
 
         private readonly SemaphoreSlim _moduleLock;
         private readonly ConcurrentDictionary<Type, ModuleInfo> _typedModuleDefs;
@@ -512,7 +512,11 @@ namespace Discord.Commands
 
             var searchResult = Search(input);
             if (!searchResult.IsSuccess)
+            {
+                await _commandExecutedEvent.InvokeAsync(Optional.Create<CommandInfo>(), context, searchResult).ConfigureAwait(false);
                 return searchResult;
+            }
+                
 
             var commands = searchResult.Commands;
             var preconditionResults = new Dictionary<CommandMatch, PreconditionResult>();
@@ -532,6 +536,8 @@ namespace Discord.Commands
                 var bestCandidate = preconditionResults
                     .OrderByDescending(x => x.Key.Command.Priority)
                     .FirstOrDefault(x => !x.Value.IsSuccess);
+
+                await _commandExecutedEvent.InvokeAsync(bestCandidate.Key.Command, context, bestCandidate.Value).ConfigureAwait(false);
                 return bestCandidate.Value;
             }
 
@@ -589,12 +595,17 @@ namespace Discord.Commands
                 //All parses failed, return the one from the highest priority command, using score as a tie breaker
                 var bestMatch = parseResults
                     .FirstOrDefault(x => !x.Value.IsSuccess);
+
+                await _commandExecutedEvent.InvokeAsync(bestMatch.Key.Command, context, bestMatch.Value).ConfigureAwait(false);
                 return bestMatch.Value;
             }
 
             //If we get this far, at least one parse was successful. Execute the most likely overload.
             var chosenOverload = successfulParses[0];
-            return await chosenOverload.Key.ExecuteAsync(context, chosenOverload.Value, services).ConfigureAwait(false);
+            var result = await chosenOverload.Key.ExecuteAsync(context, chosenOverload.Value, services).ConfigureAwait(false);
+            if (!result.IsSuccess) // succesful results raise the event in CommandInfo#ExecuteInternalAsync (have to raise it there b/c deffered execution)
+                await _commandExecutedEvent.InvokeAsync(chosenOverload.Key.Command, context, result);
+            return result;
         }
     }
 }

src/Discord.Net.Commands/Extensions/CommandServiceExtensions.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Discord.Commands
+{
+    public static class CommandServiceExtensions
+    {
+        public static async Task<IReadOnlyCollection<CommandInfo>> GetExecutableCommandsAsync(this ICollection<CommandInfo> commands, ICommandContext context, IServiceProvider provider)
+        {
+            var executableCommands = new List<CommandInfo>();
+
+            var tasks = commands.Select(async c =>
+            {
+                var result = await c.CheckPreconditionsAsync(context, provider).ConfigureAwait(false);
+                return new { Command = c, PreconditionResult = result };
+            });
+
+            var results = await Task.WhenAll(tasks).ConfigureAwait(false);
+
+            foreach (var result in results)
+            {
+                if (result.PreconditionResult.IsSuccess)
+                    executableCommands.Add(result.Command);
+            }
+
+            return executableCommands;
+        }
+        public static Task<IReadOnlyCollection<CommandInfo>> GetExecutableCommandsAsync(this CommandService commandService, ICommandContext context, IServiceProvider provider)
+            => GetExecutableCommandsAsync(commandService.Commands.ToArray(), context, provider);
+        public static async Task<IReadOnlyCollection<CommandInfo>> GetExecutableCommandsAsync(this ModuleInfo module, ICommandContext context, IServiceProvider provider)
+        {
+            var executableCommands = new List<CommandInfo>();
+
+            executableCommands.AddRange(await module.Commands.ToArray().GetExecutableCommandsAsync(context, provider).ConfigureAwait(false));
+
+            var tasks = module.Submodules.Select(async s => await s.GetExecutableCommandsAsync(context, provider).ConfigureAwait(false));
+            var results = await Task.WhenAll(tasks).ConfigureAwait(false);
+
+            executableCommands.AddRange(results.SelectMany(c => c));
+
+            return executableCommands;
+        }
+    }
+}

src/Discord.Net.Commands/Info/CommandInfo.cs

@@ -272,6 +272,10 @@ namespace Discord.Commands
 
                 var wrappedEx = new CommandException(this, context, ex);
                 await Module.Service._cmdLogger.ErrorAsync(wrappedEx).ConfigureAwait(false);
+
+                var result = ExecuteResult.FromError(ex);
+                await Module.Service._commandExecutedEvent.InvokeAsync(this, context, result).ConfigureAwait(false);
+
                 if (Module.Service._throwOnError)
                 {
                     if (ex == originalEx)
@@ -280,7 +284,7 @@ namespace Discord.Commands
                         ExceptionDispatchInfo.Capture(ex).Throw();
                 }
 
-                return ExecuteResult.FromError(CommandError.Exception, ex.Message);
+                return result;
             }
             finally
             {

src/Discord.Net.Core/Entities/Channels/INestedChannel.cs

@@ -26,6 +26,11 @@ namespace Discord
         ///     representing the parent of this channel; <c>null</c> if none is set.
         /// </returns>
         Task<ICategoryChannel> GetCategoryAsync(CacheMode mode = CacheMode.AllowDownload, RequestOptions options = null);
+        
+        /// <summary>
+        ///     Syncs the permissions of this nested channel with its parent's.
+        /// </summary>
+        Task SyncPermissionsAsync(RequestOptions options = null);
 
         /// <summary>
         ///     Creates a new invite to this channel.

src/Discord.Net.Core/Entities/Guilds/ExplicitContentFilterLevel.cs

@@ -0,0 +1,13 @@
+namespace Discord
+{
+    public enum ExplicitContentFilterLevel
+    {
+        /// <summary> No messages will be scanned. </summary>
+        Disabled = 0,
+        /// <summary> Scans messages from all guild members that do not have a role. </summary>
+        /// <remarks> Recommented option for servers that use roles for trusted membership. </remarks>
+        MembersWithoutRoles = 1,
+        /// <summary> Scan messages sent by all guild members. </summary>
+        AllMembers = 2
+    }
+}

src/Discord.Net.Core/Entities/Guilds/GuildProperties.cs

@@ -66,5 +66,9 @@ namespace Discord
         ///     Gets or sets the ID of the owner of this guild.
         /// </summary>
         public Optional<ulong> OwnerId { get; set; }
+        /// <summary>
+        ///     Gets or sets the explicit content filter level of this guild.
+        /// </summary>
+        public Optional<ExplicitContentFilterLevel> ExplicitContentFilter { get; set; }
     }
 }

src/Discord.Net.Core/Entities/Guilds/IGuild.cs

@@ -53,6 +53,13 @@ namespace Discord
         /// </returns>
         VerificationLevel VerificationLevel { get; }
         /// <summary>
+        ///     Gets the level of content filtering applied to user's content in a Guild.
+        /// </summary>
+        /// <returns>
+        ///     The level of explicit content filtering.
+        /// </returns>
+        ExplicitContentFilterLevel ExplicitContentFilter { get; }
+        /// <summary>
         ///     Gets the ID of this guild's icon.
         /// </summary>
         /// <returns>
@@ -141,6 +148,13 @@ namespace Discord
         /// </returns>
         ulong OwnerId { get; }
         /// <summary>
+        ///     Gets the application ID of the guild creator if it is bot-created.
+        /// </summary>
+        /// <returns>
+        ///     A <see cref="ulong"/> representing the snowflake identifier of the application ID that created this guild, or <c>null</c> if it was not bot-created.
+        /// </returns>
+        ulong? ApplicationId { get; }
+        /// <summary>
         ///     Gets the ID of the region hosting this guild's voice channels.
         /// </summary>
         /// <returns>

src/Discord.Net.Core/Entities/Messages/IMessage.cs

@@ -100,5 +100,25 @@ namespace Discord
         ///     A read-only collection of user IDs.
         /// </returns>
         IReadOnlyCollection<ulong> MentionedUserIds { get; }
+        /// <summary>
+        ///     Returns the Activity associated with a message.
+        /// </summary>
+        /// <remarks>
+        ///     Sent with Rich Presence-related chat embeds.
+        /// </remarks>
+        /// <returns>
+        ///     A message's activity, if any is associated.
+        /// </returns>
+        MessageActivity Activity { get; }
+        /// <summary>
+        ///     Returns the Application associated with a messsage.
+        /// </summary>
+        /// <remarks>
+        ///     Sent with Rich-Presence-related chat embeds.
+        /// </remarks>
+        /// <returns>
+        ///     A message's application, if any is associated.
+        /// </returns>
+        MessageApplication Application { get; }
     }
 }

src/Discord.Net.Core/Entities/Messages/MessageActivity.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Discord
+{
+    [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
+    public class MessageActivity
+    {
+        /// <summary>
+        ///     Gets the type of activity of this message.
+        /// </summary>
+        public MessageActivityType Type { get; internal set; }
+        /// <summary>
+        ///     Gets the party ID of this activity, if any.
+        /// </summary>
+        public string PartyId { get; internal set; }
+
+        private string DebuggerDisplay
+            => $"{Type}{(string.IsNullOrWhiteSpace(PartyId) ? "" : $" {PartyId}")}";
+
+        public override string ToString() => DebuggerDisplay;
+    }
+}

src/Discord.Net.Core/Entities/Messages/MessageActivityType.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Discord
+{
+    public enum MessageActivityType
+    {
+        Join = 1,
+        Spectate = 2,
+        Listen = 3,
+        JoinRequest = 5
+    }
+}

src/Discord.Net.Core/Entities/Messages/MessageApplication.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Discord
+{
+    [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
+    public class MessageApplication
+    {
+        /// <summary>
+        ///     Gets the snowflake ID of the application.
+        /// </summary>
+        public ulong Id { get; internal set; }
+        /// <summary>
+        ///     Gets the ID of the embed's image asset.
+        /// </summary>
+        public string CoverImage { get; internal set; }
+        /// <summary>
+        ///     Gets the application's description.
+        /// </summary>
+        public string Description { get; internal set; }
+        /// <summary>
+        ///     Gets the ID of the application's icon.
+        /// </summary>
+        public string Icon { get; internal set; }
+        /// <summary>
+        ///     Gets the Url of the application's icon.
+        /// </summary>
+        public string IconUrl
+            => $"https://cdn.discordapp.com/app-icons/{Id}/{Icon}";
+        /// <summary>
+        ///     Gets the name of the application.
+        /// </summary>
+        public string Name { get; internal set; }
+        private string DebuggerDisplay
+            => $"{Name} ({Id}): {Description}";
+        public override string ToString()
+            => DebuggerDisplay;
+    }
+}

src/Discord.Net.Core/Extensions/EmbedBuilderExtensions.cs

@@ -1,4 +1,6 @@
 using System;
+using System.Collections.Generic;
+using System.Linq;
 
 namespace Discord
 {
@@ -65,5 +67,15 @@ namespace Discord
 
             return builder;
         }
+
+        public static EmbedBuilder WithFields(this EmbedBuilder builder, IEnumerable<EmbedFieldBuilder> fields)
+        {
+            foreach (var field in fields)
+                builder.AddField(field);
+
+            return builder;
+        }
+        public static EmbedBuilder WithFields(this EmbedBuilder builder, params EmbedFieldBuilder[] fields)
+            => WithFields(builder, fields.AsEnumerable());
     }
 }

src/Discord.Net.Rest/API/Common/Guild.cs

@@ -1,4 +1,4 @@
-#pragma warning disable CS1591
+#pragma warning disable CS1591
 using Newtonsoft.Json;
 
 namespace Discord.API
@@ -25,10 +25,12 @@ namespace Discord.API
         public bool EmbedEnabled { get; set; }
         [JsonProperty("embed_channel_id")]
         public ulong? EmbedChannelId { get; set; }
-        [JsonProperty("system_channel_id")]
-        public ulong? SystemChannelId { get; set; }
         [JsonProperty("verification_level")]
         public VerificationLevel VerificationLevel { get; set; }
+        [JsonProperty("default_message_notifications")]
+        public DefaultMessageNotifications DefaultMessageNotifications { get; set; }
+        [JsonProperty("explicit_content_filter")]
+        public ExplicitContentFilterLevel ExplicitContentFilter { get; set; }
         [JsonProperty("voice_states")]
         public VoiceState[] VoiceStates { get; set; }
         [JsonProperty("roles")]
@@ -39,7 +41,9 @@ namespace Discord.API
         public string[] Features { get; set; }
         [JsonProperty("mfa_level")]
         public MfaLevel MfaLevel { get; set; }
-        [JsonProperty("default_message_notifications")]
-        public DefaultMessageNotifications DefaultMessageNotifications { get; set; }
+        [JsonProperty("application_id")]
+        public ulong? ApplicationId { get; set; }
+        [JsonProperty("system_channel_id")]
+        public ulong? SystemChannelId { get; set; }
     }
 }

src/Discord.Net.Rest/API/Common/Message.cs

@@ -44,5 +44,11 @@ namespace Discord.API
         public Optional<bool> Pinned { get; set; }
         [JsonProperty("reactions")]
         public Optional<Reaction[]> Reactions { get; set; }
+        // sent with Rich Presence-related chat embeds
+        [JsonProperty("activity")]
+        public Optional<MessageActivity> Activity { get; set; }
+        // sent with Rich Presence-related chat embeds
+        [JsonProperty("application")]
+        public Optional<MessageApplication> Application { get; set; }
     }
 }

src/Discord.Net.Rest/API/Common/MessageActivity.cs

@@ -0,0 +1,17 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Discord.API
+{
+    public class MessageActivity
+    {
+        [JsonProperty("type")]
+        public Optional<MessageActivityType> Type { get; set; }
+        [JsonProperty("party_id")]
+        public Optional<string> PartyId { get; set; }
+    }
+}

src/Discord.Net.Rest/API/Common/MessageApplication.cs

@@ -0,0 +1,38 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Discord.API
+{
+    public class MessageApplication
+    {
+        /// <summary>
+        ///     Gets the snowflake ID of the application.
+        /// </summary>
+        [JsonProperty("id")]
+        public ulong Id { get; set; }
+        /// <summary>
+        ///     Gets the ID of the embed's image asset.
+        /// </summary>
+        [JsonProperty("cover_image")]
+        public string CoverImage { get; set; }
+        /// <summary>
+        ///     Gets the application's description.
+        /// </summary>
+        [JsonProperty("description")]
+        public string Description { get; set; }
+        /// <summary>
+        ///     Gets the ID of the application's icon.
+        /// </summary>
+        [JsonProperty("icon")]
+        public string Icon { get; set; }
+        /// <summary>
+        ///     Gets the name of the application.
+        /// </summary>
+        [JsonProperty("name")]
+        public string Name { get; set; }
+    }
+}

src/Discord.Net.Rest/API/Common/Overwrite.cs

@@ -1,4 +1,4 @@
-#pragma warning disable CS1591
+#pragma warning disable CS1591
 using Newtonsoft.Json;
 
 namespace Discord.API

src/Discord.Net.Rest/API/Rest/ModifyGuildChannelParams.cs

@@ -1,4 +1,4 @@
-#pragma warning disable CS1591
+#pragma warning disable CS1591
 using Newtonsoft.Json;
 
 namespace Discord.API.Rest
@@ -12,5 +12,7 @@ namespace Discord.API.Rest
         public Optional<int> Position { get; set; }
         [JsonProperty("parent_id")]
         public Optional<ulong?> CategoryId { get; set; }
+        [JsonProperty("permission_overwrites")]
+        public Optional<Overwrite[]> Overwrites { get; set; }
     }
 }

src/Discord.Net.Rest/API/Rest/ModifyGuildParams.cs

@@ -1,4 +1,4 @@
-#pragma warning disable CS1591
+#pragma warning disable CS1591
 using Newtonsoft.Json;
 
 namespace Discord.API.Rest
@@ -28,5 +28,7 @@ namespace Discord.API.Rest
         public Optional<ulong?> AfkChannelId { get; set; }
         [JsonProperty("owner_id")]
         public Optional<ulong> OwnerId { get; set; }
+        [JsonProperty("explicit_content_filter")]
+        public Optional<ExplicitContentFilterLevel> ExplicitContentFilter { get; set; }
     }
 }

src/Discord.Net.Rest/DiscordRestApiClient.cs

@@ -1,3 +1,4 @@
+
 #pragma warning disable CS1591
 using Discord.API.Rest;
 using Discord.Net;
@@ -977,6 +978,8 @@ namespace Discord.API
             Preconditions.NotNull(args, nameof(args));
             Preconditions.AtLeast(args.MaxAge, 0, nameof(args.MaxAge));
             Preconditions.AtLeast(args.MaxUses, 0, nameof(args.MaxUses));
+            Preconditions.AtMost(args.MaxAge, 86400, nameof(args.MaxAge),
+                "The maximum age of an invite must be less than or equal to a day (86400 seconds).");
             options = RequestOptions.CreateOrClone(options);
 
             var ids = new BucketIds(channelId: channelId);
@@ -1426,8 +1429,11 @@ namespace Discord.API
 
                     lastIndex = rightIndex + 1;
                 }
+                if (builder[builder.Length - 1] == '/')
+                    builder.Remove(builder.Length - 1, 1);
 
                 format = builder.ToString();
+
                 return x => string.Format(format, x.ToArray());
             }
             catch (Exception ex)

src/Discord.Net.Rest/Entities/Channels/ChannelHelper.cs

@@ -76,9 +76,13 @@ namespace Discord.Rest
         public static async Task<RestInviteMetadata> CreateInviteAsync(IGuildChannel channel, BaseDiscordClient client,
             int? maxAge, int? maxUses, bool isTemporary, bool isUnique, RequestOptions options)
         {
-            var args = new CreateChannelInviteParams { IsTemporary = isTemporary, IsUnique = isUnique };
-            args.MaxAge = maxAge.GetValueOrDefault(0);
-            args.MaxUses = maxUses.GetValueOrDefault(0);
+            var args = new API.Rest.CreateChannelInviteParams
+            {
+                IsTemporary = isTemporary,
+                IsUnique = isUnique,
+                MaxAge = maxAge ?? 0,
+                MaxUses = maxUses ?? 0
+            };
             var model = await client.ApiClient.CreateChannelInviteAsync(channel.Id, args, options).ConfigureAwait(false);
             return RestInviteMetadata.Create(client, null, channel, model);
         }
@@ -348,6 +352,23 @@ namespace Discord.Rest
             var model = await client.ApiClient.GetChannelAsync(channel.CategoryId.Value, options).ConfigureAwait(false);
             return RestCategoryChannel.Create(client, model) as ICategoryChannel;
         }
+        public static async Task SyncPermissionsAsync(INestedChannel channel, BaseDiscordClient client, RequestOptions options)
+        {
+            var category = await GetCategoryAsync(channel, client, options).ConfigureAwait(false);
+            if (category == null) throw new InvalidOperationException("This channel does not have a parent channel.");
+
+            var apiArgs = new ModifyGuildChannelParams
+            {
+                Overwrites = category.PermissionOverwrites
+                    .Select(overwrite => new API.Overwrite{
+                        TargetId = overwrite.TargetId,
+                        TargetType = overwrite.TargetType,
+                        Allow = overwrite.Permissions.AllowValue,
+                        Deny = overwrite.Permissions.DenyValue
+                    }).ToArray()
+            };
+            await client.ApiClient.ModifyGuildChannelAsync(channel.Id, apiArgs, options).ConfigureAwait(false);
+        }
 
         //Helpers
         private static IUser GetAuthor(BaseDiscordClient client, IGuild guild, UserModel model, ulong? webhookId)

src/Discord.Net.Rest/Entities/Channels/RestTextChannel.cs

@@ -201,6 +201,8 @@ namespace Discord.Rest
         /// </returns>
         public Task<ICategoryChannel> GetCategoryAsync(RequestOptions options = null)
             => ChannelHelper.GetCategoryAsync(this, Discord, options);
+        public Task SyncPermissionsAsync(RequestOptions options = null)
+            => ChannelHelper.SyncPermissionsAsync(this, Discord, options);
 
         //Invites
         /// <inheritdoc />

src/Discord.Net.Rest/Entities/Channels/RestVoiceChannel.cs

@@ -57,6 +57,9 @@ namespace Discord.Rest
         /// </returns>
         public Task<ICategoryChannel> GetCategoryAsync(RequestOptions options = null)
             => ChannelHelper.GetCategoryAsync(this, Discord, options);
+        
+        public Task SyncPermissionsAsync(RequestOptions options = null)
+            => ChannelHelper.SyncPermissionsAsync(this, Discord, options);
          
         //Invites
         /// <inheritdoc />

src/Discord.Net.Rest/Entities/Guilds/GuildHelper.cs

@@ -32,7 +32,8 @@ namespace Discord.Rest
                 Icon = args.Icon.IsSpecified ? args.Icon.Value?.ToModel() : Optional.Create<ImageModel?>(),
                 Name = args.Name,
                 Splash = args.Splash.IsSpecified ? args.Splash.Value?.ToModel() : Optional.Create<ImageModel?>(),
-                VerificationLevel = args.VerificationLevel
+                VerificationLevel = args.VerificationLevel,
+                ExplicitContentFilter = args.ExplicitContentFilter
             };
 
             if (args.AfkChannel.IsSpecified)
@@ -60,6 +61,9 @@ namespace Discord.Rest
             if (!apiArgs.Icon.IsSpecified && guild.IconId != null)
                 apiArgs.Icon = new ImageModel(guild.IconId);
 
+            if (args.ExplicitContentFilter.IsSpecified)
+                apiArgs.ExplicitContentFilter = args.ExplicitContentFilter.Value;
+
             return await client.ApiClient.ModifyGuildAsync(guild.Id, apiArgs, options).ConfigureAwait(false);
         }
         /// <exception cref="ArgumentNullException"><paramref name="func"/> is <c>null</c>.</exception>

src/Discord.Net.Rest/Entities/Guilds/RestGuild.cs

@@ -32,6 +32,8 @@ namespace Discord.Rest
         public MfaLevel MfaLevel { get; private set; }
         /// <inheritdoc />
         public DefaultMessageNotifications DefaultMessageNotifications { get; private set; }
+        /// <inheritdoc />
+        public ExplicitContentFilterLevel ExplicitContentFilter { get; private set; }
 
         /// <inheritdoc />
         public ulong? AFKChannelId { get; private set; }
@@ -48,6 +50,8 @@ namespace Discord.Rest
         /// <inheritdoc />
         public string SplashId { get; private set; }
         internal bool Available { get; private set; }
+        /// <inheritdoc />
+        public ulong? ApplicationId { get; private set; }
 
         /// <inheritdoc />
         public DateTimeOffset CreatedAt => SnowflakeUtils.FromSnowflake(Id);
@@ -98,6 +102,8 @@ namespace Discord.Rest
             VerificationLevel = model.VerificationLevel;
             MfaLevel = model.MfaLevel;
             DefaultMessageNotifications = model.DefaultMessageNotifications;
+            ExplicitContentFilter = model.ExplicitContentFilter;
+            ApplicationId = model.ApplicationId;
 
             if (model.Emojis != null)
             {

src/Discord.Net.Rest/Entities/Messages/RestMessage.cs

@@ -55,6 +55,10 @@ namespace Discord.Rest
 
         /// <inheritdoc />
         public DateTimeOffset Timestamp => DateTimeUtils.FromTicks(_timestampTicks);
+        /// <inheritdoc />
+        public MessageActivity Activity { get; private set; }
+        /// <inheritdoc />
+        public MessageApplication Application { get; private set; }
 
         internal RestMessage(BaseDiscordClient discord, ulong id, IMessageChannel channel, IUser author, MessageSource source)
             : base(discord, id)
@@ -77,6 +81,29 @@ namespace Discord.Rest
 
             if (model.Content.IsSpecified)
                 Content = model.Content.Value;
+
+            if (model.Application.IsSpecified)
+            {
+                // create a new Application from the API model
+                Application = new MessageApplication()
+                {
+                    Id = model.Application.Value.Id,
+                    CoverImage = model.Application.Value.CoverImage,
+                    Description = model.Application.Value.Description,
+                    Icon = model.Application.Value.Icon,
+                    Name = model.Application.Value.Name
+                };
+            }
+
+            if (model.Activity.IsSpecified)
+            {
+                // create a new Activity from the API model
+                Activity = new MessageActivity()
+                {
+                    Type = model.Activity.Value.Type.Value,
+                    PartyId = model.Activity.Value.PartyId.Value
+                };
+            }
         }
 
         /// <inheritdoc />

src/Discord.Net.WebSocket/Entities/Channels/SocketTextChannel.cs

@@ -31,6 +31,8 @@ namespace Discord.WebSocket
         /// </returns>
         public ICategoryChannel Category
             => CategoryId.HasValue ? Guild.GetChannel(CategoryId.Value) as ICategoryChannel : null;
+        public Task SyncPermissionsAsync(RequestOptions options = null)
+            => ChannelHelper.SyncPermissionsAsync(this, Discord, options);
 
         private bool _nsfw;
         /// <inheritdoc />

src/Discord.Net.WebSocket/Entities/Channels/SocketVoiceChannel.cs

@@ -30,6 +30,8 @@ namespace Discord.WebSocket
         /// </returns>
         public ICategoryChannel Category
             => CategoryId.HasValue ? Guild.GetChannel(CategoryId.Value) as ICategoryChannel : null;
+        public Task SyncPermissionsAsync(RequestOptions options = null)
+            => ChannelHelper.SyncPermissionsAsync(this, Discord, options);
 
         /// <inheritdoc />
         public override IReadOnlyCollection<SocketGuildUser> Users

src/Discord.Net.WebSocket/Entities/Guilds/SocketGuild.cs

@@ -50,6 +50,8 @@ namespace Discord.WebSocket
         public MfaLevel MfaLevel { get; private set; }
         /// <inheritdoc />
         public DefaultMessageNotifications DefaultMessageNotifications { get; private set; }
+        /// <inheritdoc />
+        public ExplicitContentFilterLevel ExplicitContentFilter { get; private set; }
         /// <summary>
         ///     Gets the number of members.
         /// </summary>
@@ -73,6 +75,8 @@ namespace Discord.WebSocket
         internal bool IsAvailable { get; private set; }
         /// <summary> Indicates whether the client is connected to this guild. </summary>
         public bool IsConnected { get; internal set; }
+        /// <inheritdoc />
+        public ulong? ApplicationId { get; internal set; }
 
         internal ulong? AFKChannelId { get; private set; }
         internal ulong? EmbedChannelId { get; private set; }
@@ -346,6 +350,8 @@ namespace Discord.WebSocket
             VerificationLevel = model.VerificationLevel;
             MfaLevel = model.MfaLevel;
             DefaultMessageNotifications = model.DefaultMessageNotifications;
+            ExplicitContentFilter = model.ExplicitContentFilter;
+            ApplicationId = model.ApplicationId;
 
             if (model.Emojis != null)
             {

src/Discord.Net.WebSocket/Entities/Messages/SocketMessage.cs

@@ -43,6 +43,13 @@ namespace Discord.WebSocket
         public virtual bool IsPinned => false;
         /// <inheritdoc />
         public virtual DateTimeOffset? EditedTimestamp => null;
+
+        /// <inheritdoc />
+        public MessageActivity Activity { get; private set; }
+
+        /// <inheritdoc />
+        public MessageApplication Application { get; private set; }
+
         /// <summary>
         ///     Returns all attachments included in this message.
         /// </summary>
@@ -105,6 +112,29 @@ namespace Discord.WebSocket
 
             if (model.Content.IsSpecified)
                 Content = model.Content.Value;
+
+            if (model.Application.IsSpecified)
+            {
+                // create a new Application from the API model
+                Application = new MessageApplication()
+                {
+                    Id = model.Application.Value.Id,
+                    CoverImage = model.Application.Value.CoverImage,
+                    Description = model.Application.Value.Description,
+                    Icon = model.Application.Value.Icon,
+                    Name = model.Application.Value.Name
+                };
+            }
+
+            if (model.Activity.IsSpecified)
+            {
+                // create a new Activity from the API model
+                Activity = new MessageActivity()
+                {
+                    Type = model.Activity.Value.Type.Value,
+                    PartyId = model.Activity.Value.PartyId.Value
+                };
+            }
         }
 
         /// <inheritdoc />

src/Discord.Net.WebSocket/Entities/Users/SocketUser.cs

@@ -1,7 +1,10 @@
-using Discord.Rest;
 using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
 using System.Diagnostics;
+using System.Linq;
 using System.Threading.Tasks;
+using Discord.Rest;
 using Model = Discord.API.User;
 
 namespace Discord.WebSocket
@@ -35,6 +38,8 @@ namespace Discord.WebSocket
         public IActivity Activity => Presence.Activity;
         /// <inheritdoc />
         public UserStatus Status => Presence.Status;
+        public IReadOnlyCollection<SocketGuild> MutualGuilds
+            => Discord.Guilds.Where(g => g.Users.Any(u => u.Id == Id)).ToImmutableArray();
 
         internal SocketUser(DiscordSocketClient discord, ulong id)
             : base(discord, id)

test/Discord.Net.Tests/Tests.GuildPermissions.cs → test/Discord.Net.Tests/Tests.Guilds.cs

@@ -5,8 +5,25 @@ using Xunit;
 
 namespace Discord
 {
-    public class GuidPermissionsTests
+    public partial class Tests
     {
+        /// <summary>
+        ///     Tests the behavior of modifying the ExplicitContentFilter property of a Guild.
+        /// </summary>
+        [Fact]
+        public async Task TestExplicitContentFilter()
+        {
+            foreach (var level in Enum.GetValues(typeof(ExplicitContentFilterLevel)))
+            {
+                await _guild.ModifyAsync(x => x.ExplicitContentFilter = (ExplicitContentFilterLevel)level);
+                await _guild.UpdateAsync();
+                Assert.Equal(level, _guild.ExplicitContentFilter);
+            }
+        }
+
+        /// <summary>
+        ///     Tests the behavior of the GuildPermissions class.
+        /// </summary>
         [Fact]
         public Task TestGuildPermission()
         {