Add missing flags to SystemChannelMessageDeny (#267)

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

@@ -85,8 +85,9 @@ namespace Discord
         ///     given that the <see cref="SystemChannelId"/> has also been set.
         ///     A value of <see cref="SystemChannelMessageDeny.GuildBoost"/> will deny guild boost messages from being sent, and allow all
         ///     other types of messages.
-        ///     Refer to the extension methods <see cref="GuildExtensions.GetGuildBoostMessagesEnabled(IGuild)"/> and
-        ///     <see cref="GuildExtensions.GetWelcomeMessagesEnabled(IGuild)"/> to check if these system channel message types
+        ///     Refer to the extension methods <see cref="GuildExtensions.GetGuildBoostMessagesEnabled(IGuild)"/>,  
+        ///     <see cref="GuildExtensions.GetWelcomeMessagesEnabled(IGuild)"/>, <see cref="GuildExtensions.GetGuildSetupTipMessagesEnabled(IGuild)"/>,
+        ///     and <see cref="GuildExtensions.GetGuildWelcomeMessageReplyEnabled(IGuild)"/> to check if these system channel message types
         ///     are enabled, without the need to manipulate the logic of the flag.
         /// </remarks>
         public Optional<SystemChannelMessageDeny> SystemChannelFlags { get; set; }

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

@@ -17,6 +17,14 @@ namespace Discord
         /// <summary>
         ///     Deny the messages that are sent when a user boosts the guild.
         /// </summary>
-        GuildBoost = 0b10
+        GuildBoost = 0b10,
+        /// <summary>
+        ///     Deny the messages that are related to guild setup.
+        /// </summary>
+        GuildSetupTip = 0b100,
+        /// <summary>
+        ///     Deny the reply with sticker button on welcome messages.
+        /// </summary>
+        WelcomeMessageReply = 0b1000
     }
 }

src/Discord.Net.Core/Extensions/GuildExtensions.cs

@@ -20,5 +20,21 @@ namespace Discord
         /// <returns> A <c>bool</c> indicating if the guild boost messages are enabled in the system channel. </returns>
         public static bool GetGuildBoostMessagesEnabled(this IGuild guild)
             => !guild.SystemChannelFlags.HasFlag(SystemChannelMessageDeny.GuildBoost);
+
+        /// <summary>
+        ///     Gets if guild setup system messages are enabled.
+        /// </summary>
+        /// <param name="guild"> The guild to check. </param>
+        /// <returns> A <c>bool</c> indicating if the guild setup messages are enabled in the system channel. </returns>
+        public static bool GetGuildSetupTipMessagesEnabled(this IGuild guild)
+            => !guild.SystemChannelFlags.HasFlag(SystemChannelMessageDeny.GuildSetupTip);
+
+        /// <summary>
+        ///     Gets if guild welcome messages have a reply with sticker button.
+        /// </summary>
+        /// <param name="guild"> The guild to check. </param>
+        /// <returns> A <c>bool</c> indicating if the guild welcome messages have a reply with sticker button. </returns>
+        public static bool GetGuildWelcomeMessageReplyEnabled(this IGuild guild)
+            => !guild.SystemChannelFlags.HasFlag(SystemChannelMessageDeny.WelcomeMessageReply);
     }
 }