Move reaction methods of IUserMessage to IReactionMessage

Moves the reaction-related methods contained in IUserMessage to the IReactionMessage type. Updates the type of ISystemMessage so that it implements IReactionMessage.

src/Discord.Net.Core/Entities/Messages/IReactionMessage.cs

@@ -0,0 +1,98 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Discord
+{
+    /// <summary>
+    ///     Represents a message that can be reacted to.
+    /// </summary>
+    public interface IReactionMessage : IMessage
+    {
+        /// <summary>
+        ///     Gets all reactions included in this message.
+        /// </summary>
+        IReadOnlyDictionary<IEmote, ReactionMetadata> Reactions { get; }
+
+        /// <summary>
+        ///     Adds a reaction to this message.
+        /// </summary>
+        /// <example>
+        ///     The following example adds the reaction, <c>💕</c>, to the message.
+        ///     <code language="cs">
+        ///     await msg.AddReactionAsync(new Emoji("\U0001f495"));
+        ///     </code>
+        /// </example>
+        /// <param name="emote">The emoji used to react to this message.</param>
+        /// <param name="options">The options to be used when sending the request.</param>
+        /// <returns>
+        ///     A task that represents the asynchronous operation for adding a reaction to this message.
+        /// </returns>
+        /// <seealso cref="IEmote"/>
+        Task AddReactionAsync(IEmote emote, RequestOptions options = null);
+        /// <summary>
+        ///     Removes a reaction from message.
+        /// </summary>
+        /// <example>
+        ///     The following example removes the reaction, <c>💕</c>, added by the message author from the message.
+        ///     <code language="cs">
+        ///     await msg.RemoveReactionAsync(new Emoji("\U0001f495"), msg.Author);
+        ///     </code>
+        /// </example>
+        /// <param name="emote">The emoji used to react to this message.</param>
+        /// <param name="user">The user that added the emoji.</param>
+        /// <param name="options">The options to be used when sending the request.</param>
+        /// <returns>
+        ///     A task that represents the asynchronous operation for removing a reaction to this message.
+        /// </returns>
+        /// <seealso cref="IEmote"/>
+        Task RemoveReactionAsync(IEmote emote, IUser user, RequestOptions options = null);
+        /// <summary>
+        ///     Removes a reaction from message.
+        /// </summary>
+        /// <example>
+        ///     The following example removes the reaction, <c>💕</c>, added by the user with ID 84291986575613952 from the message.
+        ///     <code language="cs">
+        ///     await msg.RemoveReactionAsync(new Emoji("\U0001f495"), 84291986575613952);
+        ///     </code>
+        /// </example>
+        /// <param name="emote">The emoji used to react to this message.</param>
+        /// <param name="userId">The ID of the user that added the emoji.</param>
+        /// <param name="options">The options to be used when sending the request.</param>
+        /// <returns>
+        ///     A task that represents the asynchronous operation for removing a reaction to this message.
+        /// </returns>
+        /// <seealso cref="IEmote"/>
+        Task RemoveReactionAsync(IEmote emote, ulong userId, RequestOptions options = null);
+        /// <summary>
+        ///     Removes all reactions from this message.
+        /// </summary>
+        /// <param name="options">The options to be used when sending the request.</param>
+        /// <returns>
+        ///     A task that represents the asynchronous removal operation.
+        /// </returns>
+        Task RemoveAllReactionsAsync(RequestOptions options = null);
+
+        /// <summary>
+        ///     Gets all users that reacted to a message with a given emote.
+        /// </summary>
+        /// <example>
+        ///     The following example gets the users that have reacted with the emoji <c>💕</c> to the message.
+        ///     <code language="cs">
+        ///     var emoji = new Emoji("\U0001f495");
+        ///     var reactedUsers = await message.GetReactionUsersAsync(emoji, 100).FlattenAsync();
+        ///     </code>
+        /// </example>
+        /// <param name="emoji">The emoji that represents the reaction that you wish to get.</param>
+        /// <param name="limit">The number of users to request.</param>
+        /// <param name="options">The options to be used when sending the request.</param>
+        /// <returns>
+        ///     A paged collection containing a read-only collection of users that has reacted to this message.
+        ///     Flattening the paginated response into a collection of users with 
+        ///     <see cref="AsyncEnumerableExtensions.FlattenAsync{T}"/> is required if you wish to access the users.
+        /// </returns>
+        IAsyncEnumerable<IReadOnlyCollection<IUser>> GetReactionUsersAsync(IEmote emoji, int limit, RequestOptions options = null);
+    }
+}

src/Discord.Net.Core/Entities/Messages/ISystemMessage.cs

@@ -3,7 +3,7 @@ namespace Discord
     /// <summary>
     ///     Represents a generic message sent by the system.
     /// </summary>
-    public interface ISystemMessage : IMessage
+    public interface ISystemMessage : IReactionMessage
     {
     }
 }

src/Discord.Net.Core/Entities/Messages/IUserMessage.cs

@@ -7,7 +7,7 @@ namespace Discord
     /// <summary>
     ///     Represents a generic message sent by a user.
     /// </summary>
-    public interface IUserMessage : IMessage
+    public interface IUserMessage : IReactionMessage
     {
         /// <summary>
         ///     Modifies this message.
@@ -57,90 +57,6 @@ namespace Discord
         /// </returns>
         Task UnpinAsync(RequestOptions options = null);
 
-        /// <summary>
-        ///     Gets all reactions included in this message.
-        /// </summary>
-        IReadOnlyDictionary<IEmote, ReactionMetadata> Reactions { get; }
-
-        /// <summary>
-        ///     Adds a reaction to this message.
-        /// </summary>
-        /// <example>
-        ///     The following example adds the reaction, <c>💕</c>, to the message.
-        ///     <code language="cs">
-        ///     await msg.AddReactionAsync(new Emoji("\U0001f495"));
-        ///     </code>
-        /// </example>
-        /// <param name="emote">The emoji used to react to this message.</param>
-        /// <param name="options">The options to be used when sending the request.</param>
-        /// <returns>
-        ///     A task that represents the asynchronous operation for adding a reaction to this message.
-        /// </returns>
-        /// <seealso cref="IEmote"/>
-        Task AddReactionAsync(IEmote emote, RequestOptions options = null);
-        /// <summary>
-        ///     Removes a reaction from message.
-        /// </summary>
-        /// <example>
-        ///     The following example removes the reaction, <c>💕</c>, added by the message author from the message.
-        ///     <code language="cs">
-        ///     await msg.RemoveReactionAsync(new Emoji("\U0001f495"), msg.Author);
-        ///     </code>
-        /// </example>
-        /// <param name="emote">The emoji used to react to this message.</param>
-        /// <param name="user">The user that added the emoji.</param>
-        /// <param name="options">The options to be used when sending the request.</param>
-        /// <returns>
-        ///     A task that represents the asynchronous operation for removing a reaction to this message.
-        /// </returns>
-        /// <seealso cref="IEmote"/>
-        Task RemoveReactionAsync(IEmote emote, IUser user, RequestOptions options = null);
-        /// <summary>
-        ///     Removes a reaction from message.
-        /// </summary>
-        /// <example>
-        ///     The following example removes the reaction, <c>💕</c>, added by the user with ID 84291986575613952 from the message.
-        ///     <code language="cs">
-        ///     await msg.RemoveReactionAsync(new Emoji("\U0001f495"), 84291986575613952);
-        ///     </code>
-        /// </example>
-        /// <param name="emote">The emoji used to react to this message.</param>
-        /// <param name="userId">The ID of the user that added the emoji.</param>
-        /// <param name="options">The options to be used when sending the request.</param>
-        /// <returns>
-        ///     A task that represents the asynchronous operation for removing a reaction to this message.
-        /// </returns>
-        /// <seealso cref="IEmote"/>
-        Task RemoveReactionAsync(IEmote emote, ulong userId, RequestOptions options = null);
-        /// <summary>
-        ///     Removes all reactions from this message.
-        /// </summary>
-        /// <param name="options">The options to be used when sending the request.</param>
-        /// <returns>
-        ///     A task that represents the asynchronous removal operation.
-        /// </returns>
-        Task RemoveAllReactionsAsync(RequestOptions options = null);
-
-        /// <summary>
-        ///     Gets all users that reacted to a message with a given emote.
-        /// </summary>
-        /// <example>
-        ///     The following example gets the users that have reacted with the emoji <c>💕</c> to the message.
-        ///     <code language="cs">
-        ///     var emoji = new Emoji("\U0001f495");
-        ///     var reactedUsers = await message.GetReactionUsersAsync(emoji, 100).FlattenAsync();
-        ///     </code>
-        /// </example>
-        /// <param name="emoji">The emoji that represents the reaction that you wish to get.</param>
-        /// <param name="limit">The number of users to request.</param>
-        /// <param name="options">The options to be used when sending the request.</param>
-        /// <returns>
-        ///     A paged collection containing a read-only collection of users that has reacted to this message.
-        ///     Flattening the paginated response into a collection of users with 
-        ///     <see cref="AsyncEnumerableExtensions.FlattenAsync{T}"/> is required if you wish to access the users.
-        /// </returns>
-        IAsyncEnumerable<IReadOnlyCollection<IUser>> GetReactionUsersAsync(IEmote emoji, int limit, RequestOptions options = null);
-
         /// <summary>
         ///     Transforms this message's text into a human-readable form by resolving its tags.
         /// </summary>