Added WebhookId/IsWebhook to IMessage

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

@@ -11,6 +11,8 @@ namespace Discord
         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>
@@ -22,6 +24,8 @@ namespace Discord
         ulong ChannelId { 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.Rest/Entities/Messages/RestMessage.cs

@@ -19,7 +19,6 @@ namespace Discord.Rest
 
         public virtual bool IsTTS => false;
         public virtual bool IsPinned => false;
-        public virtual bool IsWebhook => false;
         public virtual DateTimeOffset? EditedTimestamp => null;
         public virtual IReadOnlyCollection<Attachment> Attachments => ImmutableArray.Create<Attachment>();
         public virtual IReadOnlyCollection<Embed> Embeds => ImmutableArray.Create<Embed>();
@@ -27,6 +26,8 @@ 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);
 

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

@@ -14,15 +14,14 @@ 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;
-
+        
-        public ulong? WebhookId { get; private set; }
-
         public override bool IsTTS => _isTTS;
         public override bool IsPinned => _isPinned;
-        public override bool IsWebhook => WebhookId != null;
+        public override ulong? WebhookId => _webhookId;
         public override DateTimeOffset? EditedTimestamp => DateTimeUtils.FromTicks(_editedTimestampTicks);
         public override IReadOnlyCollection<Attachment> Attachments => _attachments;
         public override IReadOnlyCollection<Embed> Embeds => _embeds;
@@ -55,7 +54,7 @@ namespace Discord.Rest
             if (model.MentionEveryone.IsSpecified)
                 _isMentioningEveryone = model.MentionEveryone.Value;
             if (model.WebhookId.IsSpecified)
-                WebhookId = model.WebhookId.Value;
+                _webhookId = model.WebhookId.Value;
 
             if (model.Attachments.IsSpecified)
             {

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

@@ -17,15 +17,15 @@ namespace Discord.WebSocket
 
         public virtual bool IsTTS => false;
         public virtual bool IsPinned => false;
-        public virtual bool IsWebhook => false;
         public virtual DateTimeOffset? EditedTimestamp => null;
-
         public virtual IReadOnlyCollection<Attachment> Attachments => ImmutableArray.Create<Attachment>();
         public virtual IReadOnlyCollection<Embed> Embeds => ImmutableArray.Create<Embed>();
         public virtual IReadOnlyCollection<SocketGuildChannel> MentionedChannels => ImmutableArray.Create<SocketGuildChannel>();
         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);
 

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

@@ -14,17 +14,15 @@ 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;
 
-        public ulong? WebhookId { get; private set; }
-
         public override bool IsTTS => _isTTS;
         public override bool IsPinned => _isPinned;
-        public override bool IsWebhook => WebhookId != null;
+        public override ulong? WebhookId => _webhookId;
         public override DateTimeOffset? EditedTimestamp => DateTimeUtils.FromTicks(_editedTimestampTicks);
-
         public override IReadOnlyCollection<Attachment> Attachments => _attachments;
         public override IReadOnlyCollection<Embed> Embeds => _embeds;
         public override IReadOnlyCollection<ITag> Tags => _tags;
@@ -56,7 +54,7 @@ namespace Discord.WebSocket
             if (model.MentionEveryone.IsSpecified)
                 _isMentioningEveryone = model.MentionEveryone.Value;
             if (model.WebhookId.IsSpecified)
-                WebhookId = model.WebhookId.Value;
+                _webhookId = model.WebhookId.Value;
 
             if (model.Attachments.IsSpecified)
             {