Diferentiate default and custom avatars

src/Discord.Net.Core/CDN.cs

@@ -6,7 +6,9 @@ namespace Discord
     {
         public static string GetApplicationIconUrl(ulong appId, string iconId)
             => iconId != null ? $"{DiscordConfig.CDNUrl}app-icons/{appId}/{iconId}.jpg" : null;
-        public static string GetUserAvatarUrl(ulong userId, string avatarId, ushort size, ImageFormat format)
+        public static string GetUserDefaultAvatarUrl(ushort discriminator)
+            => $"{DiscordConfig.CDNUrl}embed/avatars/{discriminator % 5}.png";
+        public static string GetUserCustomAvatarUrl(ulong userId, string avatarId, ushort size, ImageFormat format)
         {
             if (avatarId == null)
                 return null;

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

@@ -6,7 +6,11 @@ namespace Discord
     {
         /// <summary> Gets the id of this user's avatar. </summary>
         string AvatarId { get; }
-        /// <summary> Gets the url to this user's avatar. </summary>
+        /// <summary> Gets the url to this user's default avatar. </summary>
+        string GetDefaultAvatarUrl();
+        /// <summary> Gets the url to this user's custom avatar, if set. </summary>
+        string GetCustomAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128);
+        /// <summary> Gets the url to this user's custom or default avatar depending on which is available. NOTE: Ignores format and size if there is no custom avatar. </summary>
         string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128);
         /// <summary> Gets the per-username unique id for this user. </summary>
         string Discriminator { get; }

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

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Diagnostics;
 using System.Threading.Tasks;
 using Model = Discord.API.User;
@@ -57,8 +57,12 @@ namespace Discord.Rest
         public Task<RestDMChannel> GetOrCreateDMChannelAsync(RequestOptions options = null)
             => UserHelper.CreateDMChannelAsync(this, Discord, options);
 
+        public string GetDefaultAvatarUrl()
+            => CDN.GetUserDefaultAvatarUrl(DiscriminatorValue);
+        public string GetCustomAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128)
+            => CDN.GetUserCustomAvatarUrl(Id, AvatarId, size, format);
         public string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128)
-            => CDN.GetUserAvatarUrl(Id, AvatarId, size, format);
+            => GetCustomAvatarUrl(format, size) ?? GetDefaultAvatarUrl();
 
         public override string ToString() => $"{Username}#{Discriminator}";
         private string DebuggerDisplay => $"{Username}#{Discriminator} ({Id}{(IsBot ? ", Bot" : "")})";

src/Discord.Net.Rest/Entities/Webhooks/RestWebhook.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Diagnostics;
 using System.Threading.Tasks;
 using Model = Discord.API.Webhook;
@@ -66,7 +66,7 @@ namespace Discord.Rest
         }
 
         public string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128)
-           => CDN.GetUserAvatarUrl(Id, AvatarId, size, format);
+           => CDN.GetUserCustomAvatarUrl(Id, AvatarId, size, format);
 
         public async Task ModifyAsync(Action<WebhookProperties> func, RequestOptions options = null)
         {

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

@@ -1,4 +1,4 @@
-using Discord.Rest;
+using Discord.Rest;
 using System;
 using System.Threading.Tasks;
 using Model = Discord.API.User;
@@ -58,8 +58,12 @@ namespace Discord.WebSocket
         public async Task<IDMChannel> GetOrCreateDMChannelAsync(RequestOptions options = null)
             => GlobalUser.DMChannel ?? await UserHelper.CreateDMChannelAsync(this, Discord, options) as IDMChannel;
 
+        public string GetDefaultAvatarUrl()
+            => CDN.GetUserDefaultAvatarUrl(DiscriminatorValue);
+        public string GetCustomAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128)
+            => CDN.GetUserCustomAvatarUrl(Id, AvatarId, size, format);
         public string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128)
-            => CDN.GetUserAvatarUrl(Id, AvatarId, size, format);
+            => GetCustomAvatarUrl(format, size) ?? GetDefaultAvatarUrl();
 
         public override string ToString() => $"{Username}#{Discriminator}";
         private string DebuggerDisplay => $"{Username}#{Discriminator} ({Id}{(IsBot ? ", Bot" : "")})";

src/Discord.Net.Webhook/Entities/Webhooks/RestInternalWebhook.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Diagnostics;
 using System.Threading.Tasks;
 using Model = Discord.API.Webhook;
@@ -45,7 +45,7 @@ namespace Discord.Webhook
         }
 
         public string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128)
-           => CDN.GetUserAvatarUrl(Id, AvatarId, size, format);
+           => CDN.GetUserCustomAvatarUrl(Id, AvatarId, size, format);
 
         public async Task ModifyAsync(Action<WebhookProperties> func, RequestOptions options = null)
         {