more changes

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

@@ -40,4 +40,17 @@ public class WelcomeScreenChannel : ISnowflakeEntity
             Emoji = null;
 
     }
+
+    /// <summary>
+    ///     Initializes a new instance of <see cref="WelcomeScreenChannel"/> to be used to modify one.
+    /// </summary>
+    /// <param name="id"></param>
+    /// <param name="description"></param>
+    /// <param name="emoji"></param>
+    public WelcomeScreenChannel(ulong id, string description, IEmote emoji)
+    {
+        Id = id;
+        Description = description;
+        Emoji = emoji;
+    }
 }

src/Discord.Net.Rest/API/Rest/ModifyGuildWelcomeScreenParams.cs

@@ -0,0 +1,17 @@
+using Newtonsoft.Json;
+
+namespace Discord.API.Rest;
+
+
+[JsonObject(MemberSerialization = MemberSerialization.OptIn)]
+internal class ModifyGuildWelcomeScreenParams
+{
+    [JsonProperty("enabled")]
+    public Optional<bool> Enabled { get; set; }
+
+    [JsonProperty("welcome_channels")]
+    public Optional<WelcomeScreenChannel> Channels { get; set; }
+
+    [JsonProperty("description")]
+    public Optional<string> Description { get; set; }
+}

src/Discord.Net.Rest/DiscordRestApiClient.cs

@@ -1589,18 +1589,6 @@ namespace Discord.API
             var ids = new BucketIds(guildId: guildId);
             return await SendAsync<GetGuildPruneCountResponse>("GET", () => $"guilds/{guildId}/prune?days={args.Days}{endpointRoleIds}", ids, options: options).ConfigureAwait(false);
         }
-        public async Task<WelcomeScreen> GetGuildWelcomeScreenAsync(ulong guildId, RequestOptions options = null)
-        {
-            Preconditions.NotEqual(guildId, 0, nameof(guildId));
-            options = RequestOptions.CreateOrClone(options);
-
-            try
-            {
-                var ids = new BucketIds(guildId: guildId);
-                return await SendAsync<WelcomeScreen>("GET", () => $"guilds/{guildId}/welcome-screen", ids, options: options).ConfigureAwait(false);
-            }
-            catch (HttpException ex) when (ex.HttpCode == HttpStatusCode.NotFound) { return null; }
-        }
         #endregion
 
         #region Guild Bans
@@ -2109,6 +2097,35 @@ namespace Discord.API
 
         #endregion
 
+        #region Guild Welcome Screen
+
+        public async Task<WelcomeScreen> GetGuildWelcomeScreenAsync(ulong guildId, RequestOptions options = null)
+        {
+            Preconditions.NotEqual(guildId, 0, nameof(guildId));
+            options = RequestOptions.CreateOrClone(options);
+
+            try
+            {
+                var ids = new BucketIds(guildId: guildId);
+                return await SendAsync<WelcomeScreen>("GET", () => $"guilds/{guildId}/welcome-screen", ids, options: options).ConfigureAwait(false);
+            }
+            catch (HttpException ex) when (ex.HttpCode == HttpStatusCode.NotFound) { return null; }
+        }
+
+        public async Task<WelcomeScreen> ModifyGuildWelcomeScreenAsync(ModifyGuildWelcomeScreenParams args, ulong guildId, RequestOptions options = null)
+        {
+            Preconditions.NotEqual(guildId, 0, nameof(guildId));
+            Preconditions.NotNull(args, nameof(args));
+
+            options = RequestOptions.CreateOrClone(options);
+
+            var ids = new BucketIds(guildId: guildId);
+
+            return await SendJsonAsync<WelcomeScreen>("PATCH", () => $"guilds/{guildId}/welcome-screen", args, ids, options: options).ConfigureAwait(false);
+        }
+
+        #endregion
+
         #region Users
         public async Task<User> GetUserAsync(ulong userId, RequestOptions options = null)
         {

src/Discord.Net.Rest/Entities/Guilds/GuildHelper.cs

@@ -393,16 +393,6 @@ namespace Discord.Rest
             return RestInviteMetadata.Create(client, guild, null, inviteModel);
         }
 
-        public static async Task<WelcomeScreen> GetWelcomeScreenAsync(IGuild guild, BaseDiscordClient client, RequestOptions options)
-        {
-            var model = await client.ApiClient.GetGuildWelcomeScreenAsync(guild.Id, options);
-
-            return new WelcomeScreen(model.Description.GetValueOrDefault(null), model.WelcomeChannels.Select(
-                x => new WelcomeScreenChannel(
-                    x.ChannelId, x.Description,
-                    x.EmojiName.GetValueOrDefault(null),
-                    x.EmojiId.GetValueOrDefault(0))).ToList());
-        }
         #endregion
 
         #region Roles
@@ -954,5 +944,31 @@ namespace Discord.Rest
         }
 
         #endregion
+
+        #region Welcome Screen
+
+        public static async Task<WelcomeScreen> GetWelcomeScreenAsync(IGuild guild, BaseDiscordClient client, RequestOptions options)
+        {
+            var model = await client.ApiClient.GetGuildWelcomeScreenAsync(guild.Id, options);
+
+            return new WelcomeScreen(model.Description.GetValueOrDefault(null), model.WelcomeChannels.Select(
+                x => new WelcomeScreenChannel(
+                    x.ChannelId, x.Description,
+                    x.EmojiName.GetValueOrDefault(null),
+                    x.EmojiId.GetValueOrDefault(0))).ToList());
+        }
+
+        public static async Task<WelcomeScreen> ModifyWelcomeScreenAsync(IGuild guild, BaseDiscordClient client, RequestOptions options)
+        {
+            var model = await client.ApiClient.ModifyGuildWelcomeScreenAsync(null, guild.Id, options);
+
+            return new WelcomeScreen(model.Description.GetValueOrDefault(null), model.WelcomeChannels.Select(
+                x => new WelcomeScreenChannel(
+                    x.ChannelId, x.Description,
+                    x.EmojiName.GetValueOrDefault(null),
+                    x.EmojiId.GetValueOrDefault(0))).ToList());
+        }
+
+        #endregion
     }
 }