api: [brk] Move Invites-related Methods from IGuildChannel to INestedChannel (#1172)

* Move invites-related methods from IGuildChannel to INestedChannel

* Add missing implementation

...because I somehow forgot it the first time around

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

@@ -25,16 +25,6 @@ namespace Discord.Rest
 
         private string DebuggerDisplay => $"{Name} ({Id}, Category)";
 
-        // IGuildChannel
-        /// <inheritdoc />
-        /// <exception cref="NotSupportedException">This method is not supported with category channels.</exception>
-        Task<IInviteMetadata> IGuildChannel.CreateInviteAsync(int? maxAge, int? maxUses, bool isTemporary, bool isUnique, RequestOptions options)
-            => throw new NotSupportedException();
-        /// <inheritdoc />
-        /// <exception cref="NotSupportedException">This method is not supported with category channels.</exception>
-        Task<IReadOnlyCollection<IInviteMetadata>> IGuildChannel.GetInvitesAsync(RequestOptions options)
-            => throw new NotSupportedException();
-
         //IChannel
         /// <inheritdoc />
         /// <exception cref="NotSupportedException">This method is not supported with category channels.</exception>

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

@@ -178,32 +178,6 @@ namespace Discord.Rest
             }
         }
 
-        /// <summary>
-        ///     Gets a collection of all invites to this channel.
-        /// </summary>
-        /// <param name="options">The options to be used when sending the request.</param>
-        /// <returns>
-        ///     A task that represents the asynchronous get operation. The task result contains a read-only collection
-        ///     of invite metadata that are created for this channel.
-        /// </returns>
-        public async Task<IReadOnlyCollection<RestInviteMetadata>> GetInvitesAsync(RequestOptions options = null)
-            => await ChannelHelper.GetInvitesAsync(this, Discord, options).ConfigureAwait(false);
-
-        /// <summary>
-        ///     Creates a new invite to this channel.
-        /// </summary>
-        /// <param name="maxAge">The time (in seconds) until the invite expires. Set to <c>null</c> to never expire.</param>
-        /// <param name="maxUses">The max amount of times this invite may be used. Set to <c>null</c> to have unlimited uses.</param>
-        /// <param name="isTemporary">If <c>true</c>, the user accepting this invite will be kicked from the guild after closing their client.</param>
-        /// <param name="isUnique">If <c>true</c>, don't try to reuse a similar invite (useful for creating many unique one time use invites).</param>
-        /// <param name="options">The options to be used when sending the request.</param>
-        /// <returns>
-        ///     A task that represents the asynchronous invite creation operation. The task result contains an invite
-        ///     metadata object containing information for the created invite.
-        /// </returns>
-        public async Task<RestInviteMetadata> CreateInviteAsync(int? maxAge = 86400, int? maxUses = null, bool isTemporary = false, bool isUnique = false, RequestOptions options = null)
-            => await ChannelHelper.CreateInviteAsync(this, Discord, maxAge, maxUses, isTemporary, isUnique, options).ConfigureAwait(false);
-
         /// <summary>
         ///     Gets the name of this channel.
         /// </summary>
@@ -224,13 +198,6 @@ namespace Discord.Rest
             }
         }
 
-        /// <inheritdoc />
-        async Task<IReadOnlyCollection<IInviteMetadata>> IGuildChannel.GetInvitesAsync(RequestOptions options)
-            => await GetInvitesAsync(options).ConfigureAwait(false);
-        /// <inheritdoc />
-        async Task<IInviteMetadata> IGuildChannel.CreateInviteAsync(int? maxAge, int? maxUses, bool isTemporary, bool isUnique, RequestOptions options)
-            => await CreateInviteAsync(maxAge, maxUses, isTemporary, isUnique, options).ConfigureAwait(false);
-
         /// <inheritdoc />
         OverwritePermissions? IGuildChannel.GetPermissionOverwrite(IRole role)
             => GetPermissionOverwrite(role);

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

@@ -204,6 +204,14 @@ namespace Discord.Rest
         public Task SyncPermissionsAsync(RequestOptions options = null)
             => ChannelHelper.SyncPermissionsAsync(this, Discord, options);
 
+        //Invites
+        /// <inheritdoc />
+        public async Task<IInviteMetadata> CreateInviteAsync(int? maxAge = 86400, int? maxUses = null, bool isTemporary = false, bool isUnique = false, RequestOptions options = null)
+            => await ChannelHelper.CreateInviteAsync(this, Discord, maxAge, maxUses, isTemporary, isUnique, options).ConfigureAwait(false);
+        /// <inheritdoc />
+        public async Task<IReadOnlyCollection<IInviteMetadata>> GetInvitesAsync(RequestOptions options = null)
+            => await ChannelHelper.GetInvitesAsync(this, Discord, options).ConfigureAwait(false);
+
         private string DebuggerDisplay => $"{Name} ({Id}, Text)";
 
         //ITextChannel

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

@@ -57,8 +57,17 @@ namespace Discord.Rest
         /// </returns>
         public Task<ICategoryChannel> GetCategoryAsync(RequestOptions options = null)
             => ChannelHelper.GetCategoryAsync(this, Discord, options);
+        
         public Task SyncPermissionsAsync(RequestOptions options = null)
             => ChannelHelper.SyncPermissionsAsync(this, Discord, options);
+         
+        //Invites
+        /// <inheritdoc />
+        public async Task<IInviteMetadata> CreateInviteAsync(int? maxAge = 86400, int? maxUses = null, bool isTemporary = false, bool isUnique = false, RequestOptions options = null)
+            => await ChannelHelper.CreateInviteAsync(this, Discord, maxAge, maxUses, isTemporary, isUnique, options).ConfigureAwait(false);
+        /// <inheritdoc />
+        public async Task<IReadOnlyCollection<IInviteMetadata>> GetInvitesAsync(RequestOptions options = null)
+            => await ChannelHelper.GetInvitesAsync(this, Discord, options).ConfigureAwait(false);
 
         private string DebuggerDisplay => $"{Name} ({Id}, Voice)";
 
@@ -77,6 +86,7 @@ namespace Discord.Rest
             => AsyncEnumerable.Empty<IReadOnlyCollection<IGuildUser>>();
 
         // INestedChannel
+        /// <inheritdoc />
         async Task<ICategoryChannel> INestedChannel.GetCategoryAsync(CacheMode mode, RequestOptions options)
         {
             if (CategoryId.HasValue && mode == CacheMode.AllowDownload)