Added IWebhookUser and MessageSource

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

@@ -7,12 +7,12 @@ namespace Discord
     {
         /// <summary> Gets the type of this system message. </summary>
         MessageType Type { get; }
+        /// <summary> Gets the source of this message. </summary>
+        MessageSource Source { get; }
         /// <summary> Returns true if this message was sent as a text-to-speech message. </summary>
         bool IsTTS { get; }
         /// <summary> Returns true if this message was added to its channel's pinned messages. </summary>
         bool IsPinned { get; }
-        /// <summary> Returns true if this message was created using a webhook. </summary>
-        bool IsWebhook { get; }
         /// <summary> Returns the content for this message. </summary>
         string Content { get; }
         /// <summary> Gets the time this message was sent. </summary>
@@ -24,8 +24,6 @@ namespace Discord
         IMessageChannel Channel { get; }
         /// <summary> Gets the author of this message. </summary>
         IUser Author { get; }
-        /// <summary> Gets the id of the webhook used to created this message, if any. </summary>
-        ulong? WebhookId { get; }
 
         /// <summary> Returns all attachments included in this message. </summary>
         IReadOnlyCollection<IAttachment> Attachments { get; }

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

@@ -0,0 +1,10 @@
+namespace Discord
+{
+    public enum MessageSource
+    {
+        System,
+        User,
+        Bot,
+        Webhook
+    }
+}

src/Discord.Net.Core/Entities/Permissions/ChannelPermissions.cs

@@ -7,22 +7,24 @@ namespace Discord
     [DebuggerDisplay("{DebuggerDisplay,nq}")]
     public struct ChannelPermissions
     {
-        //TODO: C#7 Candidate for binary literals
-        private static ChannelPermissions _allDM { get; } = new ChannelPermissions(Convert.ToUInt64("00000000000001011100110000000000", 2));
-        private static ChannelPermissions _allVoice { get; } = new ChannelPermissions(Convert.ToUInt64("00010011111100000000000000010001", 2));
-        private static ChannelPermissions _allText { get; } = new ChannelPermissions(Convert.ToUInt64("00010000000001111111110001010001", 2));
-        private static ChannelPermissions _allGroup { get; } = new ChannelPermissions(Convert.ToUInt64("00000000000001111110110000000000", 2));
-
         /// <summary> Gets a blank ChannelPermissions that grants no permissions. </summary>
-        public static ChannelPermissions None { get; } = new ChannelPermissions();
+        public static readonly ChannelPermissions None = new ChannelPermissions();
+        /// <summary> Gets a ChannelPermissions that grants all permissions for text channels. </summary>
+        public static readonly ChannelPermissions Text = new ChannelPermissions(0b00100_0000000_1111111110001_010001);
+        /// <summary> Gets a ChannelPermissions that grants all permissions for voice channels. </summary>
+        public static readonly ChannelPermissions Voice = new ChannelPermissions(0b00100_1111110_0000000000000_010001);
+        /// <summary> Gets a ChannelPermissions that grants all permissions for direct message channels. </summary>
+        public static readonly ChannelPermissions DM = new ChannelPermissions(0b00000_1000110_1011100110000_000000);
+        /// <summary> Gets a ChannelPermissions that grants all permissions for group channels. </summary>
+        public static readonly ChannelPermissions Group = new ChannelPermissions(0b00000_1000110_0001101100000_000000);
         /// <summary> Gets a ChannelPermissions that grants all permissions for a given channelType. </summary>
         public static ChannelPermissions All(IChannel channel)
         {
             //TODO: C#7 Candidate for typeswitch
-            if (channel is ITextChannel) return _allText;
+            if (channel is ITextChannel) return Text;
-            if (channel is IVoiceChannel) return _allVoice;
+            if (channel is IVoiceChannel) return Voice;
-            if (channel is IDMChannel) return _allDM;
+            if (channel is IDMChannel) return DM;
-            if (channel is IGroupChannel) return _allGroup;
+            if (channel is IGroupChannel) return Group;
 
             throw new ArgumentException("Unknown channel type", nameof(channel));
         }
@@ -77,7 +79,7 @@ namespace Discord
         /// <summary> Creates a new ChannelPermissions with the provided packed value. </summary>
         public ChannelPermissions(ulong rawValue) { RawValue = rawValue; }
 
-        private ChannelPermissions(ulong initialValue, bool? createInstantInvite = null, bool? manageChannel = null, 
+        private ChannelPermissions(ulong initialValue, bool? createInstantInvite = null, bool? manageChannel = null,
             bool? addReactions = null,
             bool? readMessages = null, bool? sendMessages = null, bool? sendTTSMessages = null, bool? manageMessages = null,
             bool? embedLinks = null, bool? attachFiles = null, bool? readMessageHistory = null, bool? mentionEveryone = null,
@@ -111,25 +113,26 @@ namespace Discord
         }
 
         /// <summary> Creates a new ChannelPermissions with the provided permissions. </summary>
-        public ChannelPermissions(bool createInstantInvite = false, bool manageChannel = false, 
+        public ChannelPermissions(bool createInstantInvite = false, bool manageChannel = false,
             bool addReactions = false,
             bool readMessages = false, bool sendMessages = false, bool sendTTSMessages = false, bool manageMessages = false,
             bool embedLinks = false, bool attachFiles = false, bool readMessageHistory = false, bool mentionEveryone = false,
             bool useExternalEmojis = false, bool connect = false, bool speak = false, bool muteMembers = false, bool deafenMembers = false,
             bool moveMembers = false, bool useVoiceActivation = false, bool managePermissions = false, bool manageWebhooks = false)
-            : this(0, createInstantInvite, manageChannel, addReactions, readMessages, sendMessages, sendTTSMessages, manageMessages, 
+            : this(0, createInstantInvite, manageChannel, addReactions, readMessages, sendMessages, sendTTSMessages, manageMessages,
-                embedLinks, attachFiles, readMessageHistory, mentionEveryone, useExternalEmojis, connect, 
+                embedLinks, attachFiles, readMessageHistory, mentionEveryone, useExternalEmojis, connect,
-                speak, muteMembers, deafenMembers, moveMembers, useVoiceActivation, managePermissions, manageWebhooks) { }
+                speak, muteMembers, deafenMembers, moveMembers, useVoiceActivation, managePermissions, manageWebhooks)
+        { }
 
         /// <summary> Creates a new ChannelPermissions from this one, changing the provided non-null permissions. </summary>
-        public ChannelPermissions Modify(bool? createInstantInvite = null, bool? manageChannel = null, 
+        public ChannelPermissions Modify(bool? createInstantInvite = null, bool? manageChannel = null,
             bool? addReactions = null,
             bool? readMessages = null, bool? sendMessages = null, bool? sendTTSMessages = null, bool? manageMessages = null,
             bool? embedLinks = null, bool? attachFiles = null, bool? readMessageHistory = null, bool? mentionEveryone = null,
             bool useExternalEmojis = false, bool? connect = null, bool? speak = null, bool? muteMembers = null, bool? deafenMembers = null,
             bool? moveMembers = null, bool? useVoiceActivation = null, bool? managePermissions = null, bool? manageWebhooks = null)
             => new ChannelPermissions(RawValue, createInstantInvite, manageChannel, addReactions, readMessages, sendMessages, sendTTSMessages, manageMessages,
-                embedLinks, attachFiles, readMessageHistory, mentionEveryone, useExternalEmojis, connect, 
+                embedLinks, attachFiles, readMessageHistory, mentionEveryone, useExternalEmojis, connect,
                 speak, muteMembers, deafenMembers, moveMembers, useVoiceActivation, managePermissions, manageWebhooks);
 
         public bool Has(ChannelPermission permission) => Permissions.GetValue(RawValue, permission);

src/Discord.Net.Core/Entities/Permissions/GuildPermissions.cs

@@ -1,5 +1,4 @@
-using System;
+using System.Collections.Generic;
-using System.Collections.Generic;
 using System.Diagnostics;
 
 namespace Discord
@@ -9,9 +8,10 @@ namespace Discord
     {
         /// <summary> Gets a blank GuildPermissions that grants no permissions. </summary>
         public static readonly GuildPermissions None = new GuildPermissions();
-        /// <summary> Gets a GuildPermissions that grants all permissions. </summary>
+        /// <summary> Gets a GuildPermissions that grants all guild permissions for webhook users. </summary>
-        //TODO: C#7 Candidate for binary literals
+        public static readonly GuildPermissions Webhook = new GuildPermissions(0b00000_0000000_0001101100000_000000);
-        public static readonly GuildPermissions All = new GuildPermissions(Convert.ToUInt64("01111111111100111111110001111111", 2));
+        /// <summary> Gets a GuildPermissions that grants all guild permissions. </summary>
+        public static readonly GuildPermissions All = new GuildPermissions(0b11111_1111110_0111111110001_111111);
 
         /// <summary> Gets a packed value representing all the permissions in this GuildPermissions. </summary>
         public ulong RawValue { get; }

src/Discord.Net.Core/Entities/Users/IUser.cs

@@ -12,8 +12,10 @@ namespace Discord
         string Discriminator { get; }
         /// <summary> Gets the per-username unique id for this user. </summary>
         ushort DiscriminatorValue { get; }
-        /// <summary> Returns true if this user is a bot account. </summary>
+        /// <summary> Returns true if this user is a bot user. </summary>
         bool IsBot { get; }
+        /// <summary> Returns true if this user is a webhook user. </summary>
+        bool IsWebhook { get; }
         /// <summary> Gets the username for this user. </summary>
         string Username { get; }
 

src/Discord.Net.Core/Entities/Users/IWebhookUser.cs

@@ -0,0 +1,8 @@
+namespace Discord
+{
+    //TODO: Add webhook endpoints
+    public interface IWebhookUser : IGuildUser
+    {
+        ulong WebhookId { get; }
+    }
+}

src/Discord.Net.Core/Utils/AsyncEvent.cs

@@ -37,11 +37,8 @@ namespace Discord
         public static async Task InvokeAsync(this AsyncEvent<Func<Task>> eventHandler)
         {
             var subscribers = eventHandler.Subscriptions;
-            if (subscribers.Count > 0)
+            for (int i = 0; i < subscribers.Count; i++)
-            {
+                await subscribers[i].Invoke().ConfigureAwait(false);
-                for (int i = 0; i < subscribers.Count; i++)
-                    await subscribers[i].Invoke().ConfigureAwait(false);
-            }
         }
         public static async Task InvokeAsync<T>(this AsyncEvent<Func<T, Task>> eventHandler, T arg)
         {

src/Discord.Net.Core/Utils/Optional.cs

@@ -51,5 +51,9 @@ namespace Discord
     {
         public static Optional<T> Create<T>() => Optional<T>.Unspecified;
         public static Optional<T> Create<T>(T value) => new Optional<T>(value);
+
+        public static T? ToNullable<T>(this Optional<T> val)
+            where T : struct
+            => val.IsSpecified ? val.Value : (T?)null;
     }
 }

src/Discord.Net.Core/Utils/Permissions.cs

@@ -86,12 +86,16 @@ namespace Discord
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static void UnsetBit(ref ulong value, byte bit) => value &= ~(1U << bit);
 
+        public static ChannelPermissions ToChannelPerms(IGuildChannel channel, ulong guildPermissions)
+            => new ChannelPermissions(guildPermissions & ChannelPermissions.All(channel).RawValue);
         public static ulong ResolveGuild(IGuild guild, IGuildUser user)
         {
             ulong resolvedPermissions = 0;
 
             if (user.Id == guild.OwnerId)
                 resolvedPermissions = GuildPermissions.All.RawValue; //Owners always have all permissions
+            else if (user.IsWebhook)
+                resolvedPermissions = GuildPermissions.Webhook.RawValue;
             else
             {
                 foreach (var roleId in user.RoleIds)

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

@@ -91,7 +91,7 @@ namespace Discord.Rest
             var guildId = (channel as IGuildChannel)?.GuildId;
             var guild = guildId != null ? await (client as IDiscordClient).GetGuildAsync(guildId.Value, CacheMode.CacheOnly).ConfigureAwait(false) : null;
             var model = await client.ApiClient.GetChannelMessageAsync(channel.Id, id, options).ConfigureAwait(false);
-            var author = GetAuthor(client, guild, model.Author.Value);
+            var author = GetAuthor(client, guild, model.Author.Value, model.WebhookId.ToNullable());
             return RestMessage.Create(client, channel, author, model);
         }
         public static IAsyncEnumerable<IReadOnlyCollection<RestMessage>> GetMessagesAsync(IMessageChannel channel, BaseDiscordClient client, 
@@ -119,7 +119,7 @@ namespace Discord.Rest
                     var builder = ImmutableArray.CreateBuilder<RestMessage>();
                     foreach (var model in models)
                     {
-                        var author = GetAuthor(client, guild, model.Author.Value);
+                        var author = GetAuthor(client, guild, model.Author.Value, model.WebhookId.ToNullable());
                         builder.Add(RestMessage.Create(client, channel, author, model));                        
                     }
                     return builder.ToImmutable();
@@ -147,7 +147,7 @@ namespace Discord.Rest
             var builder = ImmutableArray.CreateBuilder<RestMessage>();
             foreach (var model in models)
             {
-                var author = GetAuthor(client, guild, model.Author.Value);
+                var author = GetAuthor(client, guild, model.Author.Value, model.WebhookId.ToNullable());
                 builder.Add(RestMessage.Create(client, channel, author, model));
             }
             return builder.ToImmutable();
@@ -264,13 +264,13 @@ namespace Discord.Rest
             => new TypingNotifier(client, channel, options);
 
         //Helpers
-        private static IUser GetAuthor(BaseDiscordClient client, IGuild guild, UserModel model)
+        private static IUser GetAuthor(BaseDiscordClient client, IGuild guild, UserModel model, ulong? webhookId)
         {
             IUser author = null;
             if (guild != null)
                 author = guild.GetUserAsync(model.Id, CacheMode.CacheOnly).Result;
             if (author == null)
-                author = RestUser.Create(client, model);
+                author = RestUser.Create(client, guild, model, webhookId);
             return author;
         }
     }

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

@@ -67,7 +67,7 @@ namespace Discord.Rest
             await client.ApiClient.RemovePinAsync(msg.Channel.Id, msg.Id, options).ConfigureAwait(false);
         }
 
-        public static ImmutableArray<ITag> ParseTags(string text, IMessageChannel channel, IGuild guild, ImmutableArray<IUser> userMentions)
+        public static ImmutableArray<ITag> ParseTags(string text, IMessageChannel channel, IGuild guild, IReadOnlyCollection<IUser> userMentions)
         {
             var tags = ImmutableArray.CreateBuilder<ITag>();
             
@@ -156,5 +156,16 @@ namespace Discord.Rest
                 .Where(x => x != null)
                 .ToImmutableArray();
         }
+
+        public static MessageSource GetSource(Model msg)
+        {
+            if (msg.Type != MessageType.Default)
+                return MessageSource.System;
+            else if (msg.WebhookId.IsSpecified)
+                return MessageSource.Webhook;
+            else if (msg.Author.GetValueOrDefault()?.Bot.GetValueOrDefault(false) == true)
+                return MessageSource.Bot;
+            return MessageSource.User;
+        }
     }
 }

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

@@ -13,6 +13,7 @@ namespace Discord.Rest
 
         public IMessageChannel Channel { get; }
         public IUser Author { get; }
+        public MessageSource Source { get; }
 
         public string Content { get; private set; }
 
@@ -26,16 +27,15 @@ namespace Discord.Rest
         public virtual IReadOnlyCollection<ulong> MentionedRoleIds => ImmutableArray.Create<ulong>();
         public virtual IReadOnlyCollection<RestUser> MentionedUsers => ImmutableArray.Create<RestUser>();
         public virtual IReadOnlyCollection<ITag> Tags => ImmutableArray.Create<ITag>();
-        public virtual ulong? WebhookId => null;
-        public bool IsWebhook => WebhookId != null;
 
         public DateTimeOffset Timestamp => DateTimeUtils.FromTicks(_timestampTicks);
 
-        internal RestMessage(BaseDiscordClient discord, ulong id, IMessageChannel channel, IUser author)
+        internal RestMessage(BaseDiscordClient discord, ulong id, IMessageChannel channel, IUser author, MessageSource source)
             : base(discord, id)
         {
             Channel = channel;
             Author = author;
+            Source = source;
         }
         internal static RestMessage Create(BaseDiscordClient discord, IMessageChannel channel, IUser author, Model model)
         {

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

@@ -9,7 +9,7 @@ namespace Discord.Rest
         public MessageType Type { get; private set; }
 
         internal RestSystemMessage(BaseDiscordClient discord, ulong id, IMessageChannel channel, IUser author)
-            : base(discord, id, channel, author)
+            : base(discord, id, channel, author, MessageSource.System)
         {
         }
         internal new static RestSystemMessage Create(BaseDiscordClient discord, IMessageChannel channel, IUser author, Model model)

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

@@ -13,7 +13,6 @@ namespace Discord.Rest
     {
         private bool _isMentioningEveryone, _isTTS, _isPinned;
         private long? _editedTimestampTicks;
-        private ulong? _webhookId;
         private ImmutableArray<Attachment> _attachments;
         private ImmutableArray<Embed> _embeds;
         private ImmutableArray<ITag> _tags;
@@ -21,7 +20,6 @@ namespace Discord.Rest
         
         public override bool IsTTS => _isTTS;
         public override bool IsPinned => _isPinned;
-        public override ulong? WebhookId => _webhookId;
         public override DateTimeOffset? EditedTimestamp => DateTimeUtils.FromTicks(_editedTimestampTicks);
         public override IReadOnlyCollection<Attachment> Attachments => _attachments;
         public override IReadOnlyCollection<Embed> Embeds => _embeds;
@@ -31,13 +29,13 @@ namespace Discord.Rest
         public override IReadOnlyCollection<ITag> Tags => _tags;
         public IReadOnlyDictionary<Emoji, ReactionMetadata> Reactions => _reactions.ToDictionary(x => x.Emoji, x => new ReactionMetadata { ReactionCount = x.Count, IsMe = x.Me });
 
-        internal RestUserMessage(BaseDiscordClient discord, ulong id, IMessageChannel channel, IUser author)
+        internal RestUserMessage(BaseDiscordClient discord, ulong id, IMessageChannel channel, IUser author, MessageSource source)
-            : base(discord, id, channel, author)
+            : base(discord, id, channel, author, source)
         {
         }
-        internal new static RestUserMessage Create(BaseDiscordClient discord, IMessageChannel channel, IUser author, Model model)
+        internal static new RestUserMessage Create(BaseDiscordClient discord, IMessageChannel channel, IUser author, Model model)
         {
-            var entity = new RestUserMessage(discord, model.Id, channel, author);
+            var entity = new RestUserMessage(discord, model.Id, channel, author, MessageHelper.GetSource(model));
             entity.Update(model);
             return entity;
         }
@@ -54,8 +52,6 @@ namespace Discord.Rest
                 _editedTimestampTicks = model.EditedTimestamp.Value?.UtcTicks;
             if (model.MentionEveryone.IsSpecified)
                 _isMentioningEveryone = model.MentionEveryone.Value;
-            if (model.WebhookId.IsSpecified)
-                _webhookId = model.WebhookId.Value;
 
             if (model.Attachments.IsSpecified)
             {

src/Discord.Net.Rest/Entities/Users/RestUser.cs

@@ -13,21 +13,26 @@ namespace Discord.Rest
         public ushort DiscriminatorValue { get; private set; }
         public string AvatarId { get; private set; }
 
-        public string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128) 
-            => CDN.GetUserAvatarUrl(Id, AvatarId, size, format);
         public DateTimeOffset CreatedAt => DateTimeUtils.FromSnowflake(Id);
         public string Discriminator => DiscriminatorValue.ToString("D4");
         public string Mention => MentionUtils.MentionUser(Id);
         public virtual Game? Game => null;
         public virtual UserStatus Status => UserStatus.Offline;
+        public virtual bool IsWebhook => false;
 
         internal RestUser(BaseDiscordClient discord, ulong id)
             : base(discord, id)
         {
         }
         internal static RestUser Create(BaseDiscordClient discord, Model model)
+            => Create(discord, null, model, null);
+        internal static RestUser Create(BaseDiscordClient discord, IGuild guild, Model model, ulong? webhookId)
         {
-            var entity = new RestUser(discord, model.Id);
+            RestUser entity;
+            if (webhookId.HasValue)
+                entity = new RestWebhookUser(discord, guild, model.Id, webhookId.Value);
+            else
+                entity = new RestUser(discord, model.Id);
             entity.Update(model);
             return entity;
         }
@@ -52,6 +57,9 @@ namespace Discord.Rest
         public Task<RestDMChannel> CreateDMChannelAsync(RequestOptions options = null)
             => UserHelper.CreateDMChannelAsync(this, Discord, options);
 
+        public string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128)
+            => CDN.GetUserAvatarUrl(Id, AvatarId, size, format);
+
         public override string ToString() => $"{Username}#{Discriminator}";
         private string DebuggerDisplay => $"{Username}#{Discriminator} ({Id}{(IsBot ? ", Bot" : "")})";
 

src/Discord.Net.Rest/Entities/Users/RestWebhookUser.cs

@@ -0,0 +1,83 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Diagnostics;
+using System.Threading.Tasks;
+using Model = Discord.API.User;
+
+namespace Discord.Rest
+{
+    [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
+    public class RestWebhookUser : RestUser, IWebhookUser
+    {
+        public ulong WebhookId { get; }
+        internal IGuild Guild { get; }
+
+        public override bool IsWebhook => true;
+        public ulong GuildId => Guild.Id;
+
+        internal RestWebhookUser(BaseDiscordClient discord, IGuild guild, ulong id, ulong webhookId)
+            : base(discord, id)
+        {
+            Guild = guild;
+            WebhookId = webhookId;
+        }
+        internal static RestWebhookUser Create(BaseDiscordClient discord, IGuild guild, Model model, ulong webhookId)
+        {
+            var entity = new RestWebhookUser(discord, guild, model.Id, webhookId);
+            entity.Update(model);
+            return entity;
+        }
+        
+        //IGuildUser
+        IGuild IGuildUser.Guild
+        {
+            get
+            {
+                if (Guild != null)
+                    return Guild;
+                throw new InvalidOperationException("Unable to return this entity's parent unless it was fetched through that object.");
+            }
+        }
+        IReadOnlyCollection<ulong> IGuildUser.RoleIds => ImmutableArray.Create<ulong>();
+        DateTimeOffset? IGuildUser.JoinedAt => null;
+        string IGuildUser.Nickname => null;
+        GuildPermissions IGuildUser.GuildPermissions => GuildPermissions.Webhook;
+
+        ChannelPermissions IGuildUser.GetPermissions(IGuildChannel channel) => Permissions.ToChannelPerms(channel, GuildPermissions.Webhook.RawValue);
+        Task IGuildUser.KickAsync(RequestOptions options)
+        {
+            throw new NotSupportedException("Webhook users cannot be kicked.");
+        }
+        Task IGuildUser.ModifyAsync(Action<GuildUserProperties> func, RequestOptions options)
+        {
+            throw new NotSupportedException("Webhook users cannot be modified.");
+        }
+
+        Task IGuildUser.AddRoleAsync(IRole role, RequestOptions options)
+        {
+            throw new NotSupportedException("Roles are not supported on webhook users.");
+        }
+        Task IGuildUser.AddRolesAsync(IEnumerable<IRole> roles, RequestOptions options)
+        {
+            throw new NotSupportedException("Roles are not supported on webhook users.");
+        }
+        Task IGuildUser.RemoveRoleAsync(IRole role, RequestOptions options)
+        {
+            throw new NotSupportedException("Roles are not supported on webhook users.");
+        }
+        Task IGuildUser.RemoveRolesAsync(IEnumerable<IRole> roles, RequestOptions options)
+        {
+            throw new NotSupportedException("Roles are not supported on webhook users.");
+        }
+
+        //IVoiceState
+        bool IVoiceState.IsDeafened => false;
+        bool IVoiceState.IsMuted => false;
+        bool IVoiceState.IsSelfDeafened => false;
+        bool IVoiceState.IsSelfMuted => false;
+        bool IVoiceState.IsSuppressed => false;
+        IVoiceChannel IVoiceState.VoiceChannel => null;
+        string IVoiceState.VoiceSessionId => null;
+    }
+}

src/Discord.Net.Rpc/Entities/Messages/RpcMessage.cs

@@ -13,6 +13,7 @@ namespace Discord.Rpc
 
         public IMessageChannel Channel { get; }
         public RpcUser Author { get; }
+        public MessageSource Source { get; }
 
         public string Content { get; private set; }
         public Color AuthorColor { get; private set; }
@@ -33,11 +34,12 @@ namespace Discord.Rpc
 
         public DateTimeOffset Timestamp => DateTimeUtils.FromTicks(_timestampTicks);
 
-        internal RpcMessage(DiscordRpcClient discord, ulong id, RestVirtualMessageChannel channel, RpcUser author)
+        internal RpcMessage(DiscordRpcClient discord, ulong id, RestVirtualMessageChannel channel, RpcUser author, MessageSource source)
             : base(discord, id)
         {
             Channel = channel;
             Author = author;
+            Source = source;
         }
         internal static RpcMessage Create(DiscordRpcClient discord, ulong channelId, Model model)
         {

src/Discord.Net.Rpc/Entities/Messages/RpcSystemMessage.cs

@@ -10,14 +10,14 @@ namespace Discord.Rpc
         public MessageType Type { get; private set; }
 
         internal RpcSystemMessage(DiscordRpcClient discord, ulong id, RestVirtualMessageChannel channel, RpcUser author)
-            : base(discord, id, channel, author)
+            : base(discord, id, channel, author, MessageSource.System)
         {
         }
         internal new static RpcSystemMessage Create(DiscordRpcClient discord, ulong channelId, Model model)
         {
             var entity = new RpcSystemMessage(discord, model.Id,
                 RestVirtualMessageChannel.Create(discord, channelId),
-                RpcUser.Create(discord, model.Author.Value));
+                RpcUser.Create(discord, model.Author.Value, model.WebhookId.ToNullable()));
             entity.Update(model);
             return entity;
         }

src/Discord.Net.Rpc/Entities/Messages/RpcUserMessage.cs

@@ -31,15 +31,16 @@ namespace Discord.Rpc
         public override IReadOnlyCollection<ITag> Tags => _tags;
         public IReadOnlyDictionary<Emoji, ReactionMetadata> Reactions => ImmutableDictionary.Create<Emoji, ReactionMetadata>();
 
-        internal RpcUserMessage(DiscordRpcClient discord, ulong id, RestVirtualMessageChannel channel, RpcUser author)
+        internal RpcUserMessage(DiscordRpcClient discord, ulong id, RestVirtualMessageChannel channel, RpcUser author, MessageSource source)
-            : base(discord, id, channel, author)
+            : base(discord, id, channel, author, source)
         {
         }
         internal new static RpcUserMessage Create(DiscordRpcClient discord, ulong channelId, Model model)
         {
             var entity = new RpcUserMessage(discord, model.Id, 
                 RestVirtualMessageChannel.Create(discord, channelId), 
-                RpcUser.Create(discord, model.Author.Value));
+                RpcUser.Create(discord, model.Author.Value, model.WebhookId.ToNullable()),
+                MessageHelper.GetSource(model));
             entity.Update(model);
             return entity;
         }

src/Discord.Net.Rpc/Entities/Users/RpcUser.cs

@@ -14,11 +14,10 @@ namespace Discord.Rpc
         public ushort DiscriminatorValue { get; private set; }
         public string AvatarId { get; private set; }
 
-        public string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128) 
-            => CDN.GetUserAvatarUrl(Id, AvatarId, size, format);
         public DateTimeOffset CreatedAt => DateTimeUtils.FromSnowflake(Id);
         public string Discriminator => DiscriminatorValue.ToString("D4");
         public string Mention => MentionUtils.MentionUser(Id);
+        public virtual bool IsWebhook => false;
         public virtual Game? Game => null;
         public virtual UserStatus Status => UserStatus.Offline;
 
@@ -27,8 +26,14 @@ namespace Discord.Rpc
         {
         }
         internal static RpcUser Create(DiscordRpcClient discord, Model model)
+            => Create(discord, model, null);
+        internal static RpcUser Create(DiscordRpcClient discord, Model model, ulong? webhookId)
         {
-            var entity = new RpcUser(discord, model.Id);
+            RpcUser entity;
+            if (webhookId.HasValue)
+                entity = new RpcWebhookUser(discord, model.Id, webhookId.Value);
+            else
+                entity = new RpcUser(discord, model.Id);
             entity.Update(model);
             return entity;
         }
@@ -47,6 +52,9 @@ namespace Discord.Rpc
         public Task<RestDMChannel> CreateDMChannelAsync(RequestOptions options = null)
             => UserHelper.CreateDMChannelAsync(this, Discord, options);
 
+        public string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128)
+            => CDN.GetUserAvatarUrl(Id, AvatarId, size, format);
+
         public override string ToString() => $"{Username}#{Discriminator}";
         private string DebuggerDisplay => $"{Username}#{Discriminator} ({Id}{(IsBot ? ", Bot" : "")})";
 

src/Discord.Net.Rpc/Entities/Users/RpcWebhookUser.cs

@@ -0,0 +1,25 @@
+using System.Diagnostics;
+using Model = Discord.API.User;
+
+namespace Discord.Rpc
+{
+    [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
+    public class RpcWebhookUser : RpcUser
+    {
+        public ulong WebhookId { get; }
+        
+        public override bool IsWebhook => true;
+
+        internal RpcWebhookUser(DiscordRpcClient discord, ulong id, ulong webhookId)
+            : base(discord, id)
+        {
+            WebhookId = webhookId;
+        }
+        internal static RpcWebhookUser Create(DiscordRpcClient discord, Model model, ulong webhookId)
+        {
+            var entity = new RpcWebhookUser(discord, model.Id, webhookId);
+            entity.Update(model);
+            return entity;
+        }
+    }
+}

src/Discord.Net.WebSocket/DiscordSocketClient.cs

@@ -1045,8 +1045,11 @@ namespace Discord.WebSocket
                                             await _gatewayLogger.DebugAsync("Ignored GUILD_BAN_ADD, guild is not synced yet.").ConfigureAwait(false);
                                             return;
                                         }
-                                        
+
-                                        await _userBannedEvent.InvokeAsync(SocketSimpleUser.Create(this, State, data.User), guild).ConfigureAwait(false);
+                                        SocketUser user = guild.GetUser(data.User.Id);
+                                        if (user == null)
+                                            user = SocketUnknownUser.Create(this, State, data.User);                                        
+                                        await _userBannedEvent.InvokeAsync(user, guild).ConfigureAwait(false);
                                     }
                                     else
                                     {
@@ -1071,7 +1074,7 @@ namespace Discord.WebSocket
 
                                         SocketUser user = State.GetUser(data.User.Id);
                                         if (user == null)
-                                            user = SocketSimpleUser.Create(this, State, data.User);
+                                            user = SocketUnknownUser.Create(this, State, data.User);
                                         await _userUnbannedEvent.InvokeAsync(user, guild).ConfigureAwait(false);
                                     }
                                     else
@@ -1098,8 +1101,16 @@ namespace Discord.WebSocket
                                             return;
                                         }
 
-                                        var author = (guild != null ? guild.GetUser(data.Author.Value.Id) : (channel as SocketChannel).GetUser(data.Author.Value.Id)) ??
+                                        SocketUser author;
-                                            SocketSimpleUser.Create(this, State, data.Author.Value);
+                                        if (guild != null)
+                                        {
+                                            if (data.WebhookId.IsSpecified)
+                                                author = SocketWebhookUser.Create(guild, State, data.Author.Value, data.WebhookId.Value);
+                                            else
+                                                author = guild.GetUser(data.Author.Value.Id);
+                                        }
+                                        else
+                                            author = (channel as SocketChannel).GetUser(data.Author.Value.Id);
 
                                         if (author != null)
                                         {
@@ -1153,7 +1164,7 @@ namespace Discord.WebSocket
                                             else
                                                 author = (channel as SocketChannel).GetUser(data.Author.Value.Id);
                                             if (author == null)
-                                                author = SocketSimpleUser.Create(this, State, data.Author.Value);
+                                                author = SocketUnknownUser.Create(this, State, data.Author.Value);
 
                                             after = SocketMessage.Create(this, State, author, channel, data);
                                         }

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

@@ -14,6 +14,7 @@ namespace Discord.WebSocket
         
         public SocketUser Author { get; }
         public ISocketMessageChannel Channel { get; }
+        public MessageSource Source { get; }
 
         public string Content { get; private set; }
 
@@ -27,16 +28,15 @@ namespace Discord.WebSocket
         public virtual IReadOnlyCollection<SocketRole> MentionedRoles => ImmutableArray.Create<SocketRole>();
         public virtual IReadOnlyCollection<SocketUser> MentionedUsers => ImmutableArray.Create<SocketUser>();
         public virtual IReadOnlyCollection<ITag> Tags => ImmutableArray.Create<ITag>();
-        public virtual ulong? WebhookId => null;
-        public bool IsWebhook => WebhookId != null;
 
         public DateTimeOffset Timestamp => DateTimeUtils.FromTicks(_timestampTicks);
 
-        internal SocketMessage(DiscordSocketClient discord, ulong id, ISocketMessageChannel channel, SocketUser author)
+        internal SocketMessage(DiscordSocketClient discord, ulong id, ISocketMessageChannel channel, SocketUser author, MessageSource source)
             : base(discord, id)
         {
             Channel = channel;
             Author = author;
+            Source = source;
         }
         internal static SocketMessage Create(DiscordSocketClient discord, ClientState state, SocketUser author, ISocketMessageChannel channel, Model model)
         {

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

@@ -9,7 +9,7 @@ namespace Discord.WebSocket
         public MessageType Type { get; private set; }
 
         internal SocketSystemMessage(DiscordSocketClient discord, ulong id, ISocketMessageChannel channel, SocketUser author)
-            : base(discord, id, channel, author)
+            : base(discord, id, channel, author, MessageSource.System)
         {
         }
         internal new static SocketSystemMessage Create(DiscordSocketClient discord, ClientState state, SocketUser author, ISocketMessageChannel channel, Model model)

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

@@ -14,7 +14,6 @@ namespace Discord.WebSocket
     {
         private bool _isMentioningEveryone, _isTTS, _isPinned;
         private long? _editedTimestampTicks;
-        private ulong? _webhookId;
         private ImmutableArray<Attachment> _attachments;
         private ImmutableArray<Embed> _embeds;
         private ImmutableArray<ITag> _tags;
@@ -22,7 +21,6 @@ namespace Discord.WebSocket
         
         public override bool IsTTS => _isTTS;
         public override bool IsPinned => _isPinned;
-        public override ulong? WebhookId => _webhookId;
         public override DateTimeOffset? EditedTimestamp => DateTimeUtils.FromTicks(_editedTimestampTicks);
         public override IReadOnlyCollection<Attachment> Attachments => _attachments;
         public override IReadOnlyCollection<Embed> Embeds => _embeds;
@@ -32,13 +30,13 @@ namespace Discord.WebSocket
         public override IReadOnlyCollection<SocketUser> MentionedUsers => MessageHelper.FilterTagsByValue<SocketUser>(TagType.UserMention, _tags);
         public IReadOnlyDictionary<Emoji, ReactionMetadata> Reactions => _reactions.GroupBy(r => r.Emoji).ToDictionary(x => x.Key, x => new ReactionMetadata { ReactionCount = x.Count(), IsMe = x.Any(y => y.UserId == Discord.CurrentUser.Id) });
 
-        internal SocketUserMessage(DiscordSocketClient discord, ulong id, ISocketMessageChannel channel, SocketUser author)
+        internal SocketUserMessage(DiscordSocketClient discord, ulong id, ISocketMessageChannel channel, SocketUser author, MessageSource source)
-            : base(discord, id, channel, author)
+            : base(discord, id, channel, author, source)
         {
         }
-        internal new static SocketUserMessage Create(DiscordSocketClient discord, ClientState state, SocketUser author, ISocketMessageChannel channel, Model model)
+        internal static new SocketUserMessage Create(DiscordSocketClient discord, ClientState state, SocketUser author, ISocketMessageChannel channel, Model model)
         {
-            var entity = new SocketUserMessage(discord, model.Id, channel, author);
+            var entity = new SocketUserMessage(discord, model.Id, channel, author, MessageHelper.GetSource(model));
             entity.Update(state, model);
             return entity;
         }
@@ -55,8 +53,6 @@ namespace Discord.WebSocket
                 _editedTimestampTicks = model.EditedTimestamp.Value?.UtcTicks;
             if (model.MentionEveryone.IsSpecified)
                 _isMentioningEveryone = model.MentionEveryone.Value;
-            if (model.WebhookId.IsSpecified)
-                _webhookId = model.WebhookId.Value;
 
             if (model.Attachments.IsSpecified)
             {
@@ -86,18 +82,18 @@ namespace Discord.WebSocket
                     _embeds = ImmutableArray.Create<Embed>();
             }
 
-            ImmutableArray<IUser> mentions = ImmutableArray.Create<IUser>();
+            IReadOnlyCollection<IUser> mentions = ImmutableArray.Create<SocketUnknownUser>(); //Is passed to ParseTags to get real mention collection
             if (model.UserMentions.IsSpecified)
             {
                 var value = model.UserMentions.Value;
                 if (value.Length > 0)
                 {
-                    var newMentions = ImmutableArray.CreateBuilder<IUser>(value.Length);
+                    var newMentions = ImmutableArray.CreateBuilder<SocketUnknownUser>(value.Length);
                     for (int i = 0; i < value.Length; i++)
                     {
                         var val = value[i];
                         if (val.Object != null)
-                            newMentions.Add(SocketSimpleUser.Create(Discord, Discord.State, val.Object));
+                            newMentions.Add(SocketUnknownUser.Create(Discord, state, val.Object));
                     }
                     mentions = newMentions.ToImmutable();
                 }

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

@@ -11,10 +11,11 @@ namespace Discord.WebSocket
         public override ushort DiscriminatorValue { get; internal set; }
         public override string AvatarId { get; internal set; }
         public SocketDMChannel DMChannel { get; internal set; }
-
-        internal override SocketGlobalUser GlobalUser => this;
         internal override SocketPresence Presence { get; set; }
 
+        public override bool IsWebhook => false;
+        internal override SocketGlobalUser GlobalUser => this;
+
         private readonly object _lockObj = new object();
         private ushort _references;
 

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

@@ -15,6 +15,8 @@ namespace Discord.WebSocket
         public override string AvatarId { get { return GlobalUser.AvatarId; } internal set { GlobalUser.AvatarId = value; } }
         internal override SocketPresence Presence { get { return GlobalUser.Presence; } set { GlobalUser.Presence = value; } }
 
+        public override bool IsWebhook => false;
+
         internal SocketGroupUser(SocketGroupChannel channel, SocketGlobalUser globalUser)
             : base(channel.Discord, globalUser.Id)
         {

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

@@ -28,6 +28,7 @@ namespace Discord.WebSocket
         public GuildPermissions GuildPermissions => new GuildPermissions(Permissions.ResolveGuild(Guild, this));
         internal override SocketPresence Presence { get { return GlobalUser.Presence; } set { GlobalUser.Presence = value; } }
 
+        public override bool IsWebhook => false;
         public bool IsSelfDeafened => VoiceState?.IsSelfDeafened ?? false;
         public bool IsSelfMuted => VoiceState?.IsSelfMuted ?? false;
         public bool IsSuppressed => VoiceState?.IsSuppressed ?? false;

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

@@ -20,6 +20,8 @@ namespace Discord.WebSocket
         public override string AvatarId { get { return GlobalUser.AvatarId; } internal set { GlobalUser.AvatarId = value; } }
         internal override SocketPresence Presence { get { return GlobalUser.Presence; } set { GlobalUser.Presence = value; } }
 
+        public override bool IsWebhook => false;
+
         internal SocketSelfUser(DiscordSocketClient discord, SocketGlobalUser globalUser)
             : base(discord, globalUser.Id)
         {

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

@@ -6,23 +6,25 @@ using PresenceModel = Discord.API.Presence;
 namespace Discord.WebSocket
 {
     [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
-    public class SocketSimpleUser : SocketUser
+    public class SocketUnknownUser : SocketUser
     {
-        public override bool IsBot { get; internal set; }
         public override string Username { get; internal set; }
         public override ushort DiscriminatorValue { get; internal set; }
         public override string AvatarId { get; internal set; }
+        public override bool IsBot { get; internal set; }
+
+        public override bool IsWebhook => false;
+
         internal override SocketPresence Presence { get { return new SocketPresence(UserStatus.Offline, null); } set { } }
+        internal override SocketGlobalUser GlobalUser { get { throw new NotSupportedException(); } }
 
-        internal override SocketGlobalUser GlobalUser {  get { throw new NotSupportedException(); } }
+        internal SocketUnknownUser(DiscordSocketClient discord, ulong id)
-
-        internal SocketSimpleUser(DiscordSocketClient discord, ulong id)
             : base(discord, id)
         {
         }
-        internal static SocketSimpleUser Create(DiscordSocketClient discord, ClientState state, Model model)
+        internal static SocketUnknownUser Create(DiscordSocketClient discord, ClientState state, Model model)
         {
-            var entity = new SocketSimpleUser(discord, model.Id);
+            var entity = new SocketUnknownUser(discord, model.Id);
             entity.Update(state, model);
             return entity;
         }
@@ -39,6 +41,6 @@ namespace Discord.WebSocket
                 Username = model.User.Username.Value;
         }
 
-        internal new SocketSimpleUser Clone() => MemberwiseClone() as SocketSimpleUser;
+        internal new SocketUnknownUser Clone() => MemberwiseClone() as SocketUnknownUser;
     }
 }

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

@@ -12,11 +12,10 @@ namespace Discord.WebSocket
         public abstract string Username { get; internal set; }
         public abstract ushort DiscriminatorValue { get; internal set; }
         public abstract string AvatarId { get; internal set; }
+        public abstract bool IsWebhook { get; }
         internal abstract SocketGlobalUser GlobalUser { get; }
         internal abstract SocketPresence Presence { get; set; }
 
-        public string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128) 
-            => CDN.GetUserAvatarUrl(Id, AvatarId, size, format);
         public DateTimeOffset CreatedAt => DateTimeUtils.FromSnowflake(Id);
         public string Discriminator => DiscriminatorValue.ToString("D4");
         public string Mention => MentionUtils.MentionUser(Id);
@@ -47,6 +46,9 @@ namespace Discord.WebSocket
         public Task<RestDMChannel> CreateDMChannelAsync(RequestOptions options = null)
             => UserHelper.CreateDMChannelAsync(this, Discord, options);
 
+        public string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128)
+            => CDN.GetUserAvatarUrl(Id, AvatarId, size, format);
+
         public override string ToString() => $"{Username}#{Discriminator}";
         private string DebuggerDisplay => $"{Username}#{Discriminator} ({Id}{(IsBot ? ", Bot" : "")})";
         internal SocketUser Clone() => MemberwiseClone() as SocketUser;

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

@@ -0,0 +1,98 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Diagnostics;
+using System.Threading.Tasks;
+using Model = Discord.API.User;
+using PresenceModel = Discord.API.Presence;
+
+namespace Discord.WebSocket
+{
+    [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
+    public class SocketWebhookUser : SocketUser, IWebhookUser
+    {
+        public SocketGuild Guild { get; }
+        public ulong WebhookId { get; }
+
+        public override string Username { get; internal set; }
+        public override ushort DiscriminatorValue { get; internal set; }
+        public override string AvatarId { get; internal set; }
+        public override bool IsBot { get; internal set; }
+
+        public override bool IsWebhook => true;
+
+        internal override SocketPresence Presence { get { return new SocketPresence(UserStatus.Offline, null); } set { } }
+        internal override SocketGlobalUser GlobalUser { get { throw new NotSupportedException(); } }
+
+        internal SocketWebhookUser(SocketGuild guild, ulong id, ulong webhookId)
+            : base(guild.Discord, id)
+        {
+            WebhookId = webhookId;
+        }
+        internal static SocketWebhookUser Create(SocketGuild guild, ClientState state, Model model, ulong webhookId)
+        {
+            var entity = new SocketWebhookUser(guild, model.Id, webhookId);
+            entity.Update(state, model);
+            return entity;
+        }
+
+        internal override void Update(ClientState state, PresenceModel model)
+        {
+            if (model.User.Avatar.IsSpecified)
+                AvatarId = model.User.Avatar.Value;
+            if (model.User.Discriminator.IsSpecified)
+                DiscriminatorValue = ushort.Parse(model.User.Discriminator.Value);
+            if (model.User.Bot.IsSpecified)
+                IsBot = model.User.Bot.Value;
+            if (model.User.Username.IsSpecified)
+                Username = model.User.Username.Value;
+        }
+
+        internal new SocketWebhookUser Clone() => MemberwiseClone() as SocketWebhookUser;
+
+
+        //IGuildUser
+        IGuild IGuildUser.Guild => Guild;
+        ulong IGuildUser.GuildId => Guild.Id;
+        IReadOnlyCollection<ulong> IGuildUser.RoleIds => ImmutableArray.Create<ulong>();
+        DateTimeOffset? IGuildUser.JoinedAt => null;
+        string IGuildUser.Nickname => null;
+        GuildPermissions IGuildUser.GuildPermissions => GuildPermissions.Webhook;
+
+        ChannelPermissions IGuildUser.GetPermissions(IGuildChannel channel) => Permissions.ToChannelPerms(channel, GuildPermissions.Webhook.RawValue);
+        Task IGuildUser.KickAsync(RequestOptions options)
+        {
+            throw new NotSupportedException("Webhook users cannot be kicked.");
+        }
+        Task IGuildUser.ModifyAsync(Action<GuildUserProperties> func, RequestOptions options)
+        {
+            throw new NotSupportedException("Webhook users cannot be modified.");
+        }
+
+        Task IGuildUser.AddRoleAsync(IRole role, RequestOptions options)
+        {
+            throw new NotSupportedException("Roles are not supported on webhook users.");
+        }
+        Task IGuildUser.AddRolesAsync(IEnumerable<IRole> roles, RequestOptions options)
+        {
+            throw new NotSupportedException("Roles are not supported on webhook users.");
+        }
+        Task IGuildUser.RemoveRoleAsync(IRole role, RequestOptions options)
+        {
+            throw new NotSupportedException("Roles are not supported on webhook users.");
+        }
+        Task IGuildUser.RemoveRolesAsync(IEnumerable<IRole> roles, RequestOptions options)
+        {
+            throw new NotSupportedException("Roles are not supported on webhook users.");
+        }
+
+        //IVoiceState
+        bool IVoiceState.IsDeafened => false;
+        bool IVoiceState.IsMuted => false;
+        bool IVoiceState.IsSelfDeafened => false;
+        bool IVoiceState.IsSelfMuted => false;
+        bool IVoiceState.IsSuppressed => false;
+        IVoiceChannel IVoiceState.VoiceChannel => null;
+        string IVoiceState.VoiceSessionId => null;
+    }
+}