Logic changes v. 2

src/Discord.Net.Rest/DiscordRestApiClient.cs

@@ -595,31 +595,15 @@ namespace Discord.API
             return await SendAsync<ChannelThreads>("GET", () => $"guilds/{guildId}/threads/active", bucket, options: options);
         }
 
-        public async Task<ChannelThreads> GetActiveThreadsInChannelAsync(ulong guildId, ulong parentChannel, RequestOptions options = null)
+        public async Task<ChannelThreads> GetActiveThreadsInChannelAsync(ulong channelId, RequestOptions options = null)
         {
-            Preconditions.NotEqual(guildId, 0, nameof(guildId));
+            Preconditions.NotEqual(channelId, 0, nameof(channelId));
 
             options = RequestOptions.CreateOrClone(options);
 
-            var bucket = new BucketIds(guildId: guildId);
-
-            ChannelThreads allChannelThreads = await SendAsync<ChannelThreads>("GET", () => $"guilds/{guildId}/threads/active", bucket, options: options);
-            ChannelThreads filteredThreads = new ChannelThreads();
-
-            filteredThreads.Threads = allChannelThreads.Threads.Where(x => x.CategoryId == parentChannel).ToArray();
-
-            List<ThreadMember> members = new List<ThreadMember>();
-
-            foreach (ThreadMember m in allChannelThreads.Members)
-            {
-                if (filteredThreads.Threads.Where(x => x.Id == (ulong)m.Id).Count() == 0)
-                    continue;
-                members.Add(m);
-            }
-
-            filteredThreads.Members = members.ToArray();
+            var bucket = new BucketIds(channelId: channelId);
 
-            return filteredThreads;
+            return await SendAsync<ChannelThreads>("GET", () => $"channels/{channelId}/threads/active", bucket, options: options);
         }
 
         public async Task<ChannelThreads> GetPublicArchivedThreadsAsync(ulong channelId, DateTimeOffset? before = null, int? limit = null, RequestOptions options = null)

src/Discord.Net.Rest/Entities/Channels/RestGuildChannel.cs

@@ -236,7 +236,7 @@ namespace Discord.Rest
 
         /// <inheritdoc cref="IGuildChannel.GetActiveThreadsAsync(RequestOptions)"/>
         public Task<IReadOnlyCollection<RestThreadChannel>> GetActiveThreadsAsync(RequestOptions options = null)
-            => ThreadHelper.GetActiveThreadsInChannelAsync(Guild, this, Discord, options);
+            => ThreadHelper.GetActiveThreadsInChannelAsync(this, Discord, options);
 
         /// <inheritdoc cref="IGuildChannel.GetPublicArchivedThreadsAsync(int?, DateTimeOffset?, RequestOptions)"/>
         public Task<IReadOnlyCollection<RestThreadChannel>> GetPublicArchivedThreadsAsync(int? limit = null, DateTimeOffset? before = null, RequestOptions options = null)

src/Discord.Net.Rest/Entities/Channels/ThreadHelper.cs

@@ -67,10 +67,10 @@ namespace Discord.Rest
             var result = await client.ApiClient.GetActiveThreadsAsync(guild.Id, options).ConfigureAwait(false);
             return result.Threads.Select(x => RestThreadChannel.Create(client, guild, x)).ToImmutableArray();
         }
-        public static async Task<IReadOnlyCollection<RestThreadChannel>> GetActiveThreadsInChannelAsync(IGuild guild, IGuildChannel parentChannel, BaseDiscordClient client, RequestOptions options)
+        public static async Task<IReadOnlyCollection<RestThreadChannel>> GetActiveThreadsInChannelAsync(IGuildChannel channel, BaseDiscordClient client, RequestOptions options)
         {
-            var result = await client.ApiClient.GetActiveThreadsInChannelAsync(guild.Id, parentChannel.Id, options).ConfigureAwait(false);
-            return result.Threads.Select(x => RestThreadChannel.Create(client, guild, x)).ToImmutableArray();
+            var result = await client.ApiClient.GetActiveThreadsInChannelAsync(channel.Id, options).ConfigureAwait(false);
+            return result.Threads.Select(x => RestThreadChannel.Create(client, channel.Guild, x)).ToImmutableArray();
         }
 
         public static async Task<IReadOnlyCollection<RestThreadChannel>> GetPublicArchivedThreadsAsync(IGuildChannel channel, BaseDiscordClient client, int? limit = null,

src/Discord.Net.WebSocket/Entities/Channels/SocketGuildChannel.cs

@@ -179,7 +179,7 @@ namespace Discord.WebSocket
 
         /// <inheritdoc cref="IGuildChannel.GetActiveThreadsAsync(RequestOptions)"/>
         public Task<IReadOnlyCollection<RestThreadChannel>> GetActiveThreadsAsync(RequestOptions options = null)
-            => ThreadHelper.GetActiveThreadsInChannelAsync(Guild, this, Discord, options);
+            => ThreadHelper.GetActiveThreadsInChannelAsync(this, Discord, options);
 
         /// <inheritdoc cref="IGuildChannel.GetPublicArchivedThreadsAsync(int?, DateTimeOffset?, RequestOptions)"/>
         public Task<IReadOnlyCollection<RestThreadChannel>> GetPublicArchivedThreadsAsync(int? limit = null, DateTimeOffset? before = null, RequestOptions options = null)