Update Guild and Message Models (#1165)

* Add ExplicitContentFilter property to Guild

* re-order properties to match order listed on api docs

* re-order SystemChannelId to match api docs

* Implement ApplicationId in Guild model

* Add ExplicitContentFilter property to Guild

* re-order properties to match order listed on api docs

* re-order SystemChannelId to match api docs

* Implement ApplicationId in Guild model

* Improve xmldoc for IGuild ExplicitContentFilter

* Update xmldoc

* docs "Id" -> "ID"

* rename Test.GuildPermissions to a more general Test.Guilds

* Add ExplicitContentFilter to GuildProperties

* Add a test for ExplicitContentFilterLevel modification behavior

* Implement ModifyAsync behavior

* simplify ExplicitContentFilter test

* Add RestGuild ApplicationId inheritdoc

* Implement message Activity and Application model update

* RestMessage Application and Activity implementation

* add ToString to MessageApplication

* Add IconUrl property to MessageApplication

* clean up whitespace

* another excessive whitespace removal

src/Discord.Net.Core/Entities/Guilds/ExplicitContentFilterLevel.cs

@@ -0,0 +1,13 @@
+namespace Discord
+{
+    public enum ExplicitContentFilterLevel
+    {
+        /// <summary> No messages will be scanned. </summary>
+        Disabled = 0,
+        /// <summary> Scans messages from all guild members that do not have a role. </summary>
+        /// <remarks> Recommented option for servers that use roles for trusted membership. </remarks>
+        MembersWithoutRoles = 1,
+        /// <summary> Scan messages sent by all guild members. </summary>
+        AllMembers = 2
+    }
+}

src/Discord.Net.Core/Entities/Guilds/GuildProperties.cs

@@ -66,5 +66,9 @@ namespace Discord
         ///     Gets or sets the ID of the owner of this guild.
         /// </summary>
         public Optional<ulong> OwnerId { get; set; }
+        /// <summary>
+        ///     Gets or sets the explicit content filter level of this guild.
+        /// </summary>
+        public Optional<ExplicitContentFilterLevel> ExplicitContentFilter { get; set; }
     }
 }

src/Discord.Net.Core/Entities/Guilds/IGuild.cs

@@ -53,6 +53,13 @@ namespace Discord
         /// </returns>
         VerificationLevel VerificationLevel { get; }
         /// <summary>
+        ///     Gets the level of content filtering applied to user's content in a Guild.
+        /// </summary>
+        /// <returns>
+        ///     The level of explicit content filtering.
+        /// </returns>
+        ExplicitContentFilterLevel ExplicitContentFilter { get; }
+        /// <summary>
         ///     Gets the ID of this guild's icon.
         /// </summary>
         /// <returns>
@@ -141,6 +148,13 @@ namespace Discord
         /// </returns>
         ulong OwnerId { get; }
         /// <summary>
+        ///     Gets the application ID of the guild creator if it is bot-created.
+        /// </summary>
+        /// <returns>
+        ///     A <see cref="ulong"/> representing the snowflake identifier of the application ID that created this guild, or <c>null</c> if it was not bot-created.
+        /// </returns>
+        ulong? ApplicationId { get; }
+        /// <summary>
         ///     Gets the ID of the region hosting this guild's voice channels.
         /// </summary>
         /// <returns>

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

@@ -100,5 +100,25 @@ namespace Discord
         ///     A read-only collection of user IDs.
         /// </returns>
         IReadOnlyCollection<ulong> MentionedUserIds { get; }
+        /// <summary>
+        ///     Returns the Activity associated with a message.
+        /// </summary>
+        /// <remarks>
+        ///     Sent with Rich Presence-related chat embeds.
+        /// </remarks>
+        /// <returns>
+        ///     A message's activity, if any is associated.
+        /// </returns>
+        MessageActivity Activity { get; }
+        /// <summary>
+        ///     Returns the Application associated with a messsage.
+        /// </summary>
+        /// <remarks>
+        ///     Sent with Rich-Presence-related chat embeds.
+        /// </remarks>
+        /// <returns>
+        ///     A message's application, if any is associated.
+        /// </returns>
+        MessageApplication Application { get; }
     }
 }

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

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Discord
+{
+    [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
+    public class MessageActivity
+    {
+        /// <summary>
+        ///     Gets the type of activity of this message.
+        /// </summary>
+        public MessageActivityType Type { get; set; }
+        /// <summary>
+        ///     Gets the party ID of this activity, if any.
+        /// </summary>
+        public string PartyId { get; set; }
+
+        private string DebuggerDisplay
+            => $"{Type}{(string.IsNullOrWhiteSpace(PartyId) ? "" : $" {PartyId}")}";
+
+        public override string ToString() => DebuggerDisplay;
+    }
+}

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

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Discord
+{
+    public enum MessageActivityType
+    {
+        Join = 1,
+        Spectate = 2,
+        Listen = 3,
+        JoinRequest = 5
+    }
+}

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

@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Discord
+{
+    [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
+    public class MessageApplication
+    {
+        /// <summary>
+        ///     Gets the snowflake ID of the application.
+        /// </summary>
+        public ulong Id { get; set; }
+        /// <summary>
+        ///     Gets the ID of the embed's image asset.
+        /// </summary>
+        public string CoverImage { get; set; }
+        /// <summary>
+        ///     Gets the application's description.
+        /// </summary>
+        public string Description { get; set; }
+        /// <summary>
+        ///     Gets the ID of the application's icon.
+        /// </summary>
+        public string Icon { get; set; }
+        /// <summary>
+        ///     Gets the Url of the application's icon.
+        /// </summary>
+        public string IconUrl
+            => $"https://cdn.discordapp.com/app-icons/{Id}/{Icon}";
+        /// <summary>
+        ///     Gets the name of the application.
+        /// </summary>
+        public string Name { get; set; }
+        private string DebuggerDisplay
+            => $"{Name} ({Id}): {Description}";
+        public override string ToString()
+            => DebuggerDisplay;
+    }
+}