Resolves #971

src/Discord.Net.Core/CDN.cs

@@ -13,6 +13,8 @@ namespace Discord
             string extension = FormatToExtension(format, avatarId);
             return $"{DiscordConfig.CDNUrl}avatars/{userId}/{avatarId}.{extension}?size={size}";
         }
+        public static string GetUserDefaultAvatarUrl(ushort discrim)
+            => $"{DiscordConfig.CDNUrl}embed/avatars/{discrim}.png";
         public static string GetGuildIconUrl(ulong guildId, string iconId)
             => iconId != null ? $"{DiscordConfig.CDNUrl}icons/{guildId}/{iconId}.jpg" : null;
         public static string GetGuildSplashUrl(ulong guildId, string splashId)

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

@@ -8,6 +8,10 @@ namespace Discord
         string AvatarId { get; }
         /// <summary> Gets the url to this user's avatar. </summary>
         string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128);
+        /// <summary> Get the url to this user's custom avatar. </summary>
+        string GetCustomAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128);
+        /// <summary> Get the url to this user's default avatar. </summary>
+        string GetDefaultAvatarUrl();
         /// <summary> Gets the per-username unique id for this user. </summary>
         string Discriminator { get; }
         /// <summary> Gets the per-username unique id for this user. </summary>
@@ -16,6 +20,8 @@ namespace Discord
         bool IsBot { get; }
         /// <summary> Returns true if this user is a webhook user. </summary>
         bool IsWebhook { get; }
+        /// <summary> Returns true if this user has set a custom avatar. </summary>
+        bool HasCustomAvatar { get; }
         /// <summary> Gets the username for this user. </summary>
         string Username { 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;
@@ -9,6 +9,7 @@ namespace Discord.Rest
     public class RestUser : RestEntity<ulong>, IUser, IUpdateable
     {
         public bool IsBot { get; private set; }
+        public bool HasCustomeAvatar { get; private set; }
         public string Username { get; private set; }
         public ushort DiscriminatorValue { get; private set; }
         public string AvatarId { get; private set; }
@@ -19,6 +20,7 @@ namespace Discord.Rest
         public virtual IActivity Activity => null;
         public virtual UserStatus Status => UserStatus.Offline;
         public virtual bool IsWebhook => false;
+        public bool HasCustomAvatar => AvatarId != null;
 
         internal RestUser(BaseDiscordClient discord, ulong id)
             : base(discord, id)
@@ -58,13 +60,20 @@ namespace Discord.Rest
             => UserHelper.CreateDMChannelAsync(this, Discord, options);
 
         public string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128)
+            => GetCustomAvatarUrl(format, size) ?? GetDefaultAvatarUrl();
+
+        public string GetCustomAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128)
             => CDN.GetUserAvatarUrl(Id, AvatarId, size, format);
 
+        public string GetDefaultAvatarUrl()
+            => CDN.GetUserDefaultAvatarUrl(DiscriminatorValue);
+
         public override string ToString() => $"{Username}#{Discriminator}";
         private string DebuggerDisplay => $"{Username}#{Discriminator} ({Id}{(IsBot ? ", Bot" : "")})";
 
         //IUser
         async Task<IDMChannel> IUser.GetOrCreateDMChannelAsync(RequestOptions options)
             => await GetOrCreateDMChannelAsync(options);
+
     }
 }

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;
@@ -20,6 +20,7 @@ namespace Discord.WebSocket
         public string Mention => MentionUtils.MentionUser(Id);
         public IActivity Activity => Presence.Activity;
         public UserStatus Status => Presence.Status;
+        public bool HasCustomAvatar => AvatarId != null;
 
         internal SocketUser(DiscordSocketClient discord, ulong id)
             : base(discord, id)
@@ -59,10 +60,17 @@ namespace Discord.WebSocket
             => GlobalUser.DMChannel ?? await UserHelper.CreateDMChannelAsync(this, Discord, options) as IDMChannel;
 
         public string GetAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128)
+            => GetCustomAvatarUrl(format, size) ?? GetDefaultAvatarUrl();
+
+        public string GetCustomAvatarUrl(ImageFormat format = ImageFormat.Auto, ushort size = 128)
             => CDN.GetUserAvatarUrl(Id, AvatarId, size, format);
 
+        public string GetDefaultAvatarUrl()
+            => CDN.GetUserDefaultAvatarUrl(DiscriminatorValue);
+
         public override string ToString() => $"{Username}#{Discriminator}";
         private string DebuggerDisplay => $"{Username}#{Discriminator} ({Id}{(IsBot ? ", Bot" : "")})";
         internal SocketUser Clone() => MemberwiseClone() as SocketUser;
+
     }
 }