Request offline users on connect

src/Discord.Net/API/Client/GatewaySocket/Commands/RequestMembers.cs

@@ -10,8 +10,8 @@ namespace Discord.API.Client.GatewaySocket
         object IWebSocketMessage.Payload => this;
         bool IWebSocketMessage.IsPrivate => false;
 
-        [JsonProperty("guild_id"), JsonConverter(typeof(LongStringConverter))]
-        public ulong GuildId { get; set; }
+        [JsonProperty("guild_id"), JsonConverter(typeof(LongStringArrayConverter))]
+        public ulong[] GuildId { get; set; }
         [JsonProperty("query")]
         public string Query { get; set; }
         [JsonProperty("limit")]

src/Discord.Net/DiscordClient.cs

@@ -479,12 +479,16 @@ namespace Discord
                             PrivateUser.Update(data.User);
                             CurrentUser = new Profile(this, data.User.Id);
                             CurrentUser.Update(data.User);
+
+                            List<ulong> largeServers = new List<ulong>();
                             foreach (var model in data.Guilds)
                             {
                                 if (model.Unavailable != true)
                                 {
                                     var server = AddServer(model.Id);
                                     server.Update(model);
+                                    if (model.IsLarge)
+                                        largeServers.Add(server.Id);
                                 }
                             }
                             foreach (var model in data.PrivateChannels)
@@ -492,6 +496,7 @@ namespace Discord
                                 var channel = AddPrivateChannel(model.Id, model.Recipient.Id);
                                 channel.Update(model);
                             }
+                            GatewaySocket.SendRequestMembers(largeServers, "", 0);
                             if (Config.LogLevel >= LogSeverity.Verbose)
                             {
                                 stopwatch.Stop();

src/Discord.Net/Models/Server.cs

@@ -501,10 +501,6 @@ namespace Discord
             var response = await Client.ClientAPI.Send(request).ConfigureAwait(false);
             return response.Pruned;
         }
-
-        /// <summary>When Config.UseLargeThreshold is enabled, running this command will request the Discord server to provide you with all offline users for this server.</summary>
-        public void RequestOfflineUsers()
-            => Client.GatewaySocket.SendRequestMembers(Id, "", 0);
         #endregion
 
         internal Server Clone()

src/Discord.Net/Net/WebSockets/GatewaySocket.cs

@@ -8,6 +8,7 @@ using Newtonsoft.Json.Linq;
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -179,8 +180,8 @@ namespace Discord.Net.WebSockets
             });
 		public void SendUpdateVoice(ulong? serverId, ulong? channelId, bool isSelfMuted, bool isSelfDeafened)
             => QueueMessage(new UpdateVoiceCommand { GuildId = serverId, ChannelId = channelId, IsSelfMuted = isSelfMuted, IsSelfDeafened = isSelfDeafened });
-		public void SendRequestMembers(ulong serverId, string query, int limit)
-            => QueueMessage(new RequestMembersCommand { GuildId = serverId, Query = query, Limit = limit });
+		public void SendRequestMembers(IEnumerable<ulong> serverId, string query, int limit)
+            => QueueMessage(new RequestMembersCommand { GuildId = serverId.ToArray(), Query = query, Limit = limit });
 
         //Cancel if either DiscordClient.Disconnect is called, data socket errors or timeout is reached
         public override void WaitForConnection(CancellationToken cancelToken)