Added more extension methods

src/Discord.Net/Extensions/DiscordClientExtensions.cs

@@ -1,4 +1,4 @@
-using Discord.Rest;
+using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 
@@ -6,7 +6,20 @@ namespace Discord
 {
     public static class DiscordClientExtensions
     {
-        public static async Task<IVoiceRegion> GetOptimalVoiceRegionAsync(this DiscordRestClient discord)
+        public static async Task<IPrivateChannel> GetPrivateChannelAsync(this IDiscordClient client, ulong id)
+            => await client.GetChannelAsync(id).ConfigureAwait(false) as IPrivateChannel;
+
+        public static async Task<IDMChannel> GetDMChannelAsync(this IDiscordClient client, ulong id)
+            => await client.GetPrivateChannelAsync(id).ConfigureAwait(false) as IDMChannel;
+        public static async Task<IEnumerable<IDMChannel>> GetDMChannelsAsync(this IDiscordClient client, ulong id)
+            => (await client.GetPrivateChannelsAsync().ConfigureAwait(false)).Select(x => x as IDMChannel).Where(x => x != null);
+
+        public static async Task<IGroupChannel> GetGroupChannelAsync(this IDiscordClient client, ulong id)
+            => await client.GetPrivateChannelAsync(id).ConfigureAwait(false) as IGroupChannel;
+        public static async Task<IEnumerable<IGroupChannel>> GetGroupChannelsAsync(this IDiscordClient client, ulong id)
+            => (await client.GetPrivateChannelsAsync().ConfigureAwait(false)).Select(x => x as IGroupChannel).Where(x => x != null);
+
+        public static async Task<IVoiceRegion> GetOptimalVoiceRegionAsync(this IDiscordClient discord)
         {
             var regions = await discord.GetVoiceRegionsAsync().ConfigureAwait(false);
             return regions.FirstOrDefault(x => x.IsOptimal);

src/Discord.Net/Extensions/GuildExtensions.cs

@@ -1,4 +1,6 @@
-using System.Threading.Tasks;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
 
 namespace Discord
 {
@@ -6,8 +8,13 @@ namespace Discord
     {
         public static async Task<ITextChannel> GetTextChannelAsync(this IGuild guild, ulong id)
             => await guild.GetChannelAsync(id).ConfigureAwait(false) as ITextChannel;
+        public static async Task<IEnumerable<ITextChannel>> GetTextChannelsAsync(this IGuild guild)
+            => (await guild.GetChannelsAsync().ConfigureAwait(false)).Select(x => x as ITextChannel).Where(x => x != null);
+
         public static async Task<IVoiceChannel> GetVoiceChannelAsync(this IGuild guild, ulong id)
             => await guild.GetChannelAsync(id).ConfigureAwait(false) as IVoiceChannel;
+        public static async Task<IEnumerable<IVoiceChannel>> GetVoiceChannelsAsync(this IGuild guild)
+            => (await guild.GetChannelsAsync().ConfigureAwait(false)).Select(x => x as IVoiceChannel).Where(x => x != null);
 
         public static async Task<IVoiceChannel> GetAFKChannelAsync(this IGuild guild)
         {

src/Discord.Net/WebSocket/Extensions/DiscordClientExtensions.cs

@@ -3,43 +3,49 @@ using System.Linq;
 
 namespace Discord.WebSocket
 {
-    public static class SocketClientExtensions
+    public static class DiscordClientExtensions
     {
-        public static IVoiceRegion GetVoiceRegion(this DiscordSocketClient client, string id)
+        public static IPrivateChannel GetPrivateChannel(this DiscordSocketClient client, ulong id)
-        {
+            => client.GetChannel(id) as IPrivateChannel;
-            var region = client.VoiceRegions.FirstOrDefault(r => r.Id == id);
-            return region;
-        }
 
+        public static IDMChannel GetDMChannel(this DiscordSocketClient client, ulong id)
+            => client.GetPrivateChannelAsync(id) as IDMChannel;
+        public static IEnumerable<IDMChannel> GetDMChannels(this DiscordSocketClient client, ulong id)
+            => client.GetPrivateChannels().Select(x => x as IDMChannel).Where(x => x != null);
+
+        public static IGroupChannel GetGroupChannel(this DiscordSocketClient client, ulong id)
+            => client.GetPrivateChannel(id) as IGroupChannel;
+        public static IEnumerable<IGroupChannel> GetGroupChannels(this DiscordSocketClient client, ulong id)
+            => client.GetPrivateChannels().Select(x => x as IGroupChannel).Where(x => x != null);
+        
+        public static IVoiceRegion GetVoiceRegion(this DiscordSocketClient client, string id)
+            => client.VoiceRegions.FirstOrDefault(r => r.Id == id);
         public static IReadOnlyCollection<IVoiceRegion> GetVoiceRegions(this DiscordSocketClient client) =>
             client.VoiceRegions;
+        public static IVoiceRegion GetOptimalVoiceRegion(this DiscordSocketClient client)
+            => client.VoiceRegions.FirstOrDefault(x => x.IsOptimal);
 
         public static IGuild GetGuild(this DiscordSocketClient client, ulong id) =>
             client.DataStore.GetGuild(id);
-
         public static GuildEmbed? GetGuildEmbed(this DiscordSocketClient client, ulong id)
         {
             var guild = client.DataStore.GetGuild(id);
             if (guild != null)
                 return new GuildEmbed(guild.IsEmbeddable, guild.EmbedChannelId);
             return null;
-        }
+        }        
-        
         public static IReadOnlyCollection<IGuild> GetGuilds(this DiscordSocketClient client) =>
             client.Guilds;
 
         public static IChannel GetChannel(this DiscordSocketClient client, ulong id) =>
             client.DataStore.GetChannel(id);
-
         public static IReadOnlyCollection<IPrivateChannel> GetPrivateChannels(this DiscordSocketClient client) =>
             client.DataStore.PrivateChannels;
 
         public static IUser GetUser(this DiscordSocketClient client, ulong id) =>
             client.DataStore.GetUser(id);
-
         public static IUser GetUser(this DiscordSocketClient client, string username, string discriminator) =>
             client.DataStore.Users.Where(x => x.Discriminator == discriminator && x.Username == username).FirstOrDefault();
-
         public static ISelfUser GetCurrentUser(this DiscordSocketClient client) =>
             client.CurrentUser;
 

src/Discord.Net/WebSocket/Extensions/GuildExtensions.cs

@@ -8,31 +8,25 @@ namespace Discord.WebSocket
     public static class GuildExtensions
     {
         // Channels
-
         public static IGuildChannel GetChannel(this IGuild guild, ulong id) =>
             GetSocketGuild(guild).GetChannel(id);
-
         public static IReadOnlyCollection<IGuildChannel> GetChannels(this IGuild guild) =>
             GetSocketGuild(guild).Channels;
 
         public static ITextChannel GetTextChannel(this IGuild guild, ulong id) =>
             GetSocketGuild(guild).GetChannel(id) as ITextChannel;
-
         public static IEnumerable<ITextChannel> GetTextChannels(this IGuild guild) =>
             GetSocketGuild(guild).Channels.Select(c => c as ITextChannel).Where(c => c != null);
 
 
         public static IVoiceChannel GetVoiceChannel(this IGuild guild, ulong id) =>
             GetSocketGuild(guild).GetChannel(id) as IVoiceChannel;
-
         public static IEnumerable<IVoiceChannel> GetVoiceChannels(this IGuild guild) =>
             GetSocketGuild(guild).Channels.Select(c => c as IVoiceChannel).Where(c => c != null);
 
         // Users
-
         public static IGuildUser GetCurrentUser(this IGuild guild) =>
             GetSocketGuild(guild).CurrentUser;
-
         public static IGuildUser GetUser(this IGuild guild, ulong id) =>
             GetSocketGuild(guild).GetUser(id);
 
@@ -41,10 +35,10 @@ namespace Discord.WebSocket
 
         public static int GetUserCount(this IGuild guild) =>
             GetSocketGuild(guild).MemberCount;
-
         public static int GetCachedUserCount(this IGuild guild) =>
             GetSocketGuild(guild).DownloadedMemberCount;
 
+        //Helpers
         internal static SocketGuild GetSocketGuild(IGuild guild)
         {
             var socketGuild = guild as SocketGuild;