Removed IChannel#Nsfw, added to ITextChannel

src/Discord.Net.Commands/Attributes/Preconditions/RequireNsfwAttribute.cs

@@ -11,7 +11,7 @@ namespace Discord.Commands
     {
         public override Task<PreconditionResult> CheckPermissions(ICommandContext context, CommandInfo command, IServiceProvider services)
         {
-            if (context.Channel.IsNsfw)
+            if (context.Channel is ITextChannel text && text.IsNsfw)
                 return Task.FromResult(PreconditionResult.FromSuccess());
             else
                 return Task.FromResult(PreconditionResult.FromError("This command may only be invoked in an NSFW channel."));

src/Discord.Net.Core/Entities/Channels/IChannel.cs

@@ -7,10 +7,7 @@ namespace Discord
     {
         /// <summary> Gets the name of this channel. </summary>
         string Name { get; }
-
+        
-        /// <summary> Checks if the channel is NSFW. </summary>
-        bool IsNsfw { get; }
-
         /// <summary> Gets a collection of all users in this channel. </summary>
         IAsyncEnumerable<IReadOnlyCollection<IUser>> GetUsersAsync(CacheMode mode = CacheMode.AllowDownload, RequestOptions options = null);
         

src/Discord.Net.Core/Entities/Channels/ITextChannel.cs

@@ -5,6 +5,9 @@ namespace Discord
 {
     public interface ITextChannel : IMessageChannel, IMentionable, IGuildChannel
     {
+        /// <summary> Checks if the channel is NSFW. </summary>
+        bool IsNsfw { get; }
+
         /// <summary> Gets the current topic for this text channel. </summary>
         string Topic { get; }
 

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

@@ -46,7 +46,6 @@ namespace Discord.Rest
 
         //IChannel
         string IChannel.Name => null;
-        bool IChannel.IsNsfw => false;
 
         Task<IUser> IChannel.GetUserAsync(ulong id, CacheMode mode, RequestOptions options)
             => Task.FromResult<IUser>(null); //Overriden

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

@@ -15,7 +15,8 @@ namespace Discord.Rest
 
         public string Mention => MentionUtils.MentionChannel(Id);
 
-        internal bool Nsfw { get; private set; }
+        private bool _nsfw;
+        public bool IsNsfw => _nsfw || ChannelHelper.IsNsfw(this);
 
         internal RestTextChannel(BaseDiscordClient discord, IGuild guild, ulong id)
             : base(discord, guild, id)
@@ -32,7 +33,7 @@ namespace Discord.Rest
             base.Update(model);
 
             Topic = model.Topic.Value;
-            Nsfw = model.Nsfw.GetValueOrDefault();
+            _nsfw = model.Nsfw.GetValueOrDefault();
         }
 
         public async Task ModifyAsync(Action<TextChannelProperties> func, RequestOptions options = null)
@@ -152,6 +153,5 @@ namespace Discord.Rest
             else
                 return AsyncEnumerable.Empty<IReadOnlyCollection<IGuildUser>>();
         }
-        bool IChannel.IsNsfw => Nsfw || ChannelHelper.IsNsfw(this);
     }
 }

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

@@ -99,7 +99,6 @@ namespace Discord.Rest
 
         //IChannel
         string IChannel.Name { get { throw new NotSupportedException(); } }
-        bool IChannel.IsNsfw { get { throw new NotSupportedException(); } }
         IAsyncEnumerable<IReadOnlyCollection<IUser>> IChannel.GetUsersAsync(CacheMode mode, RequestOptions options)
         {
             throw new NotSupportedException();

src/Discord.Net.Rpc/Entities/Channels/RpcChannel.cs

@@ -8,7 +8,6 @@ namespace Discord.Rpc
     public class RpcChannel : RpcEntity<ulong>
     {
         public string Name { get; private set; }
-        public bool IsNsfw => ChannelHelper.IsNsfw(Name);
 
         public DateTimeOffset CreatedAt => SnowflakeUtils.FromSnowflake(Id);
 

src/Discord.Net.Rpc/Entities/Channels/RpcTextChannel.cs

@@ -16,6 +16,8 @@ namespace Discord.Rpc
         public IReadOnlyCollection<RpcMessage> CachedMessages { get; private set; }
 
         public string Mention => MentionUtils.MentionChannel(Id);
+        // TODO: Check if RPC includes the 'nsfw' field on Channel models
+        public bool IsNsfw => ChannelHelper.IsNsfw(this);
 
         internal RpcTextChannel(DiscordRpcClient discord, ulong id, ulong guildId)
             : base(discord, id, guildId)

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

@@ -41,7 +41,6 @@ namespace Discord.WebSocket
 
         //IChannel
         string IChannel.Name => null;
-        bool IChannel.IsNsfw => false;
 
         Task<IUser> IChannel.GetUserAsync(ulong id, CacheMode mode, RequestOptions options)
             => Task.FromResult<IUser>(null); //Overridden

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

@@ -16,7 +16,9 @@ namespace Discord.WebSocket
         private readonly MessageCache _messages;
 
         public string Topic { get; private set; }
-        internal bool Nsfw { get; private set; }
+        
+        private bool _nsfw;
+        public bool IsNsfw => _nsfw || ChannelHelper.IsNsfw(this);
 
         public string Mention => MentionUtils.MentionChannel(Id);
         public IReadOnlyCollection<SocketMessage> CachedMessages => _messages?.Messages ?? ImmutableArray.Create<SocketMessage>();
@@ -42,7 +44,7 @@ namespace Discord.WebSocket
             base.Update(state, model);
 
             Topic = model.Topic.Value;
-            Nsfw = model.Nsfw.GetValueOrDefault();
+            _nsfw = model.Nsfw.GetValueOrDefault();
         }
 
         public Task ModifyAsync(Action<TextChannelProperties> func, RequestOptions options = null)
@@ -146,8 +148,5 @@ namespace Discord.WebSocket
             => await SendMessageAsync(text, isTTS, embed, options).ConfigureAwait(false);
         IDisposable IMessageChannel.EnterTypingState(RequestOptions options)
             => EnterTypingState(options);
-
-        // IChannel
-        bool IChannel.IsNsfw => Nsfw || ChannelHelper.IsNsfw(this);
     }
 }