Add FollowupWithFileAsync to IDiscordInteraction (#336)

src/Discord.Net.Core/Entities/Interactions/IDiscordInteraction.cs

@@ -1,4 +1,5 @@
 using System;
+using System.IO;
 using System.Threading.Tasks;
 
 namespace Discord
@@ -64,6 +65,44 @@ namespace Discord
         Task<IUserMessage> FollowupAsync(string text = null, Embed[] embeds = null, bool isTTS = false, bool ephemeral = false,
              AllowedMentions allowedMentions = null, RequestOptions options = null, MessageComponent component = null, Embed embed = null);
 
+        /// <summary>
+        ///     Sends a followup message for this interaction.
+        /// </summary>
+        /// <param name="text">The text of the message to be sent.</param>
+        /// <param name="fileStream">The file to upload.</param>
+        /// <param name="fileName">The file name of the attachment.</param>
+        /// <param name="embeds">A array of embeds to send with this response. Max 10.</param>
+        /// <param name="isTTS"><see langword="true"/> if the message should be read out by a text-to-speech reader, otherwise <see langword="false"/>.</param>
+        /// <param name="ephemeral"><see langword="true"/> if the response should be hidden to everyone besides the invoker of the command, otherwise <see langword="false"/>.</param>
+        /// <param name="allowedMentions">The allowed mentions for this response.</param>
+        /// <param name="options">The request options for this response.</param>
+        /// <param name="component">A <see cref="MessageComponent"/> to be sent with this response.</param>
+        /// <param name="embed">A single embed to send with this response. If this is passed alongside an array of embeds, the single embed will be ignored.</param>
+        /// <returns>
+        ///     The sent message.
+        /// </returns>
+        public Task<IUserMessage> FollowupWithFileAsync(Stream fileStream, string fileName, string text = null, Embed[] embeds = null, bool isTTS = false, bool ephemeral = false,
+            AllowedMentions allowedMentions = null, RequestOptions options = null, MessageComponent component = null, Embed embed = null);
+
+        /// <summary>
+        ///     Sends a followup message for this interaction.
+        /// </summary>
+        /// <param name="text">The text of the message to be sent.</param>
+        /// <param name="filePath">The file to upload.</param>
+        /// <param name="fileName">The file name of the attachment.</param>
+        /// <param name="embeds">A array of embeds to send with this response. Max 10.</param>
+        /// <param name="isTTS"><see langword="true"/> if the message should be read out by a text-to-speech reader, otherwise <see langword="false"/>.</param>
+        /// <param name="ephemeral"><see langword="true"/> if the response should be hidden to everyone besides the invoker of the command, otherwise <see langword="false"/>.</param>
+        /// <param name="allowedMentions">The allowed mentions for this response.</param>
+        /// <param name="options">The request options for this response.</param>
+        /// <param name="component">A <see cref="MessageComponent"/> to be sent with this response.</param>
+        /// <param name="embed">A single embed to send with this response. If this is passed alongside an array of embeds, the single embed will be ignored.</param>
+        /// <returns>
+        ///     The sent message.
+        /// </returns>
+        public Task<IUserMessage> FollowupWithFileAsync(string filePath, string text = null, string fileName = null, Embed[] embeds = null, bool isTTS = false, bool ephemeral = false,
+            AllowedMentions allowedMentions = null, RequestOptions options = null, MessageComponent component = null, Embed embed = null);
+
         /// <summary>
         ///     Gets the original response for this interaction.
         /// </summary>

src/Discord.Net.Rest/Entities/Interactions/RestInteraction.cs

@@ -219,6 +219,16 @@ namespace Discord.Rest
         /// <inheritdoc/>
         async Task<IUserMessage> IDiscordInteraction.ModifyOriginalResponseAsync(Action<MessageProperties> func, RequestOptions options)
             => await ModifyOriginalResponseAsync(func, options).ConfigureAwait(false);
+
+        /// <inheritdoc/>
+        async Task<IUserMessage> IDiscordInteraction.FollowupWithFileAsync(Stream fileStream, string fileName, string text = null, Embed[] embeds = null, bool isTTS = false, bool ephemeral = false,
+            AllowedMentions allowedMentions = null, RequestOptions options = null, MessageComponent component = null, Embed embed = null)
+            => await FollowupWithFileAsync(fileStream, fileName, text, embeds, isTTS, ephemeral, allowedMentions, options, component, embed).ConfigureAwait(false);
+
+        /// <inheritdoc/>
+        async Task<IUserMessage> IDiscordInteraction.FollowupWithFileAsync(string filePath, string text = null, string fileName = null, Embed[] embeds = null, bool isTTS = false, bool ephemeral = false,
+            AllowedMentions allowedMentions = null, RequestOptions options = null, MessageComponent component = null, Embed embed = null)
+            => await FollowupWithFileAsync(filePath, text, fileName, embeds, isTTS, ephemeral, allowedMentions, options, component, embed).ConfigureAwait(false);
         #endregion
     }
 }

src/Discord.Net.WebSocket/Entities/Interaction/SocketInteraction.cs

@@ -231,6 +231,16 @@ namespace Discord.WebSocket
             RequestOptions options, MessageComponent component, Embed embed)
             => await FollowupAsync(text, embeds, isTTS, ephemeral, allowedMentions, options, component, embed).ConfigureAwait(false);
 
+        /// <inheritdoc/>
+        async Task<IUserMessage> IDiscordInteraction.FollowupWithFileAsync(Stream fileStream, string fileName, string text = null, Embed[] embeds = null, bool isTTS = false, bool ephemeral = false,
+            AllowedMentions allowedMentions = null, RequestOptions options = null, MessageComponent component = null, Embed embed = null)
+            => await FollowupWithFileAsync(fileStream, fileName, text, embeds, isTTS, ephemeral, allowedMentions, options, component, embed).ConfigureAwait(false);
+
+        /// <inheritdoc/>
+        async Task<IUserMessage> IDiscordInteraction.FollowupWithFileAsync(string filePath, string text = null, string fileName = null, Embed[] embeds = null, bool isTTS = false, bool ephemeral = false,
+            AllowedMentions allowedMentions = null, RequestOptions options = null, MessageComponent component = null, Embed embed = null)
+            => await FollowupWithFileAsync(filePath, text, fileName, embeds, isTTS, ephemeral, allowedMentions, options, component, embed).ConfigureAwait(false);
+
         /// <inheritdoc/>
         async Task<IUserMessage> IDiscordInteraction.GetOriginalResponseAsync(RequestOptions options)
             => await GetOriginalResponseAsync(options).ConfigureAwait(false);