Add GetReactionUsersAsync(IEmote) overload

Resolves #730

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

@@ -22,7 +22,9 @@ namespace Discord
         Task RemoveReactionAsync(IEmote emote, IUser user, RequestOptions options = null);
         /// <summary> Removes all reactions from this message. </summary>
         Task RemoveAllReactionsAsync(RequestOptions options = null);
+        [Obsolete("GetReactionUsersAsync(string...) is deprecated, use GetReactionUsersAsync(IEmote...)")]
         Task<IReadOnlyCollection<IUser>> GetReactionUsersAsync(string emoji, int limit = 100, ulong? afterUserId = null, RequestOptions options = null);
+        Task<IReadOnlyCollection<IUser>> GetReactionUsersAsync(IEmote emoji, int limit = 100, ulong? afterUserId = null, RequestOptions options = null);
 
         /// <summary> Transforms this message's text into a human readable form by resolving its tags. </summary>
         string Resolve(

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

@@ -43,11 +43,12 @@ namespace Discord.Rest
             await client.ApiClient.RemoveAllReactionsAsync(msg.Channel.Id, msg.Id, options);
         }
 
-        public static async Task<IReadOnlyCollection<IUser>> GetReactionUsersAsync(IMessage msg, string emoji,
+        public static async Task<IReadOnlyCollection<IUser>> GetReactionUsersAsync(IMessage msg, IEmote emote,
             Action<GetReactionUsersParams> func, BaseDiscordClient client, RequestOptions options)
         {
             var args = new GetReactionUsersParams();
             func(args);
+            string emoji = (emote is Emote e ? $"{e.Name}:{e.Id}" : emote.Name);
             return (await client.ApiClient.GetReactionUsersAsync(msg.Channel.Id, msg.Id, emoji, args, options).ConfigureAwait(false)).Select(u => RestUser.Create(client, u)).ToImmutableArray();
         }
 

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

@@ -136,10 +136,13 @@ namespace Discord.Rest
             => MessageHelper.RemoveReactionAsync(this, user, emote, Discord, options);
         public Task RemoveAllReactionsAsync(RequestOptions options = null)
             => MessageHelper.RemoveAllReactionsAsync(this, Discord, options);
-        
+
+        [Obsolete("GetReactionUsersAsync(string...) is deprecated, use GetReactionUsersAsync(IEmote...)")]
         public Task<IReadOnlyCollection<IUser>> GetReactionUsersAsync(string emoji, int limit = 100, ulong? afterUserId = null, RequestOptions options = null)
-            => MessageHelper.GetReactionUsersAsync(this, emoji, x => { x.Limit = limit; x.AfterUserId = afterUserId ?? Optional.Create<ulong>(); }, Discord, options);
-        
+            => MessageHelper.GetReactionUsersAsync(this, new Emoji(emoji), x => { x.Limit = limit; x.AfterUserId = afterUserId ?? Optional.Create<ulong>(); }, Discord, options);
+        public Task<IReadOnlyCollection<IUser>> GetReactionUsersAsync(IEmote emote, int limit = 100, ulong? afterUserId = null, RequestOptions options = null)
+            => MessageHelper.GetReactionUsersAsync(this, emote, x => { x.Limit = limit; x.AfterUserId = afterUserId ?? Optional.Create<ulong>(); }, Discord, options);
+
 
         public Task PinAsync(RequestOptions options = null)
             => MessageHelper.PinAsync(this, Discord, options);

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

@@ -109,8 +109,11 @@ namespace Discord.Rpc
         public Task RemoveAllReactionsAsync(RequestOptions options = null)
             => MessageHelper.RemoveAllReactionsAsync(this, Discord, options);
         
-        public Task<IReadOnlyCollection<IUser>> GetReactionUsersAsync(string emoji, int limit, ulong? afterUserId, RequestOptions options = null)
-            => MessageHelper.GetReactionUsersAsync(this, emoji, x => { x.Limit = limit; x.AfterUserId = afterUserId.HasValue ? afterUserId.Value : Optional.Create<ulong>(); }, Discord, options);
+        [Obsolete("GetReactionUsersAsync(string...) is deprecated, use GetReactionUsersAsync(IEmote...)")]
+        public Task<IReadOnlyCollection<IUser>> GetReactionUsersAsync(string emoji, int limit = 100, ulong? afterUserId = null, RequestOptions options = null)
+            => MessageHelper.GetReactionUsersAsync(this, new Emoji(emoji), x => { x.Limit = limit; x.AfterUserId = afterUserId ?? Optional.Create<ulong>(); }, Discord, options);
+        public Task<IReadOnlyCollection<IUser>> GetReactionUsersAsync(IEmote emote, int limit = 100, ulong? afterUserId = null, RequestOptions options = null)
+            => MessageHelper.GetReactionUsersAsync(this, emote, x => { x.Limit = limit; x.AfterUserId = afterUserId ?? Optional.Create<ulong>(); }, Discord, options);
 
         public Task PinAsync(RequestOptions options)
             => MessageHelper.PinAsync(this, Discord, options);

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

@@ -131,8 +131,11 @@ namespace Discord.WebSocket
         public Task RemoveAllReactionsAsync(RequestOptions options = null)
             => MessageHelper.RemoveAllReactionsAsync(this, Discord, options);
 
+        [Obsolete("GetReactionUsersAsync(string...) is deprecated, use GetReactionUsersAsync(IEmote...)")]
         public Task<IReadOnlyCollection<IUser>> GetReactionUsersAsync(string emoji, int limit = 100, ulong? afterUserId = null, RequestOptions options = null)
-            => MessageHelper.GetReactionUsersAsync(this, emoji, x => { x.Limit = limit; x.AfterUserId = afterUserId.HasValue ? afterUserId.Value : Optional.Create<ulong>(); }, Discord, options);
+            => MessageHelper.GetReactionUsersAsync(this, new Emoji(emoji), x => { x.Limit = limit; x.AfterUserId = afterUserId ?? Optional.Create<ulong>(); }, Discord, options);
+        public Task<IReadOnlyCollection<IUser>> GetReactionUsersAsync(IEmote emote, int limit = 100, ulong? afterUserId = null, RequestOptions options = null)
+            => MessageHelper.GetReactionUsersAsync(this, emote, x => { x.Limit = limit; x.AfterUserId = afterUserId ?? Optional.Create<ulong>(); }, Discord, options);
 
         public Task PinAsync(RequestOptions options = null)
             => MessageHelper.PinAsync(this, Discord, options);