Attempts to resolve #961 (#962)

* Move REST requests to appropiate class

* Add call to ClientHelper and expose to public API

* Expose shard count request in public api

* Expose method from interface

* Update sharded client to utilize the new method

* Method is already implemented in a base class

* Refactor name to fit pattern for methods returning a `Task`

* Adds missing ConfigureAwait

* Corrects unnecessary whitespace

* Removes unneeded whitespace

src/Discord.Net.Rest/BaseDiscordClient.cs

@@ -1,4 +1,4 @@
-using Discord.Logging;
+using Discord.Logging;
 using System;
 using System.Collections.Generic;
 using System.Collections.Immutable;
@@ -125,6 +125,10 @@ namespace Discord.Rest
         /// <inheritdoc />
         public void Dispose() => Dispose(true);
 
+        /// <inheritdoc />
+        public Task<int> GetRecommendedShardCountAsync(RequestOptions options = null)
+            => ClientHelper.GetRecommendShardCountAsync(this, options);
+
         //IDiscordClient
         ConnectionState IDiscordClient.ConnectionState => ConnectionState.Disconnected;
         ISelfUser IDiscordClient.CurrentUser => CurrentUser;

src/Discord.Net.Rest/ClientHelper.cs

@@ -1,4 +1,4 @@
-using Discord.API.Rest;
+using Discord.API.Rest;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.IO;
@@ -163,5 +163,11 @@ namespace Discord.Rest
             var models = await client.ApiClient.GetVoiceRegionsAsync(options).ConfigureAwait(false);
             return models.Select(x => RestVoiceRegion.Create(client, x)).FirstOrDefault(x => x.Id == id);
         }
+
+        public static async Task<int> GetRecommendShardCountAsync(BaseDiscordClient client, RequestOptions options)
+        {
+            var response = await client.ApiClient.GetBotGatewayAsync(options).ConfigureAwait(false);
+            return response.Shards;
+        }
     }
 }

src/Discord.Net.Rest/DiscordRestApiClient.cs

@@ -269,6 +269,18 @@ namespace Discord.API
             await SendAsync("GET", () => "auth/login", new BucketIds(), options: options).ConfigureAwait(false);
         }
 
+        //Gateway
+        public async Task<GetGatewayResponse> GetGatewayAsync(RequestOptions options = null)
+        {
+            options = RequestOptions.CreateOrClone(options);
+            return await SendAsync<GetGatewayResponse>("GET", () => "gateway", new BucketIds(), options: options).ConfigureAwait(false);
+        }
+        public async Task<GetBotGatewayResponse> GetBotGatewayAsync(RequestOptions options = null)
+        {
+            options = RequestOptions.CreateOrClone(options);
+            return await SendAsync<GetBotGatewayResponse>("GET", () => "gateway/bot", new BucketIds(), options: options).ConfigureAwait(false);
+        }
+
         //Channels
         public async Task<Channel> GetChannelAsync(ulong channelId, RequestOptions options = null)
         {

src/Discord.Net.Rest/DiscordRestClient.cs

@@ -1,4 +1,4 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.IO;
 using System.Threading.Tasks;