fix: don't try to re-send stickers and activity invites

Myriad/Rest/Types/Requests/ExecuteWebhookRequest.cs

@@ -8,6 +8,7 @@ public record ExecuteWebhookRequest
     public string? Username { get; init; }
     public string? AvatarUrl { get; init; }
     public Embed[] Embeds { get; init; }
+    public Sticker[] Stickers { get; init; }
     public Message.Attachment[] Attachments { get; set; }
     public AllowedMentions? AllowedMentions { get; init; }
 }

Myriad/Types/Message.cs

@@ -43,6 +43,7 @@ public record Message
     public ulong Id { get; init; }
     public ulong ChannelId { get; init; }
     public ulong? GuildId { get; init; }
+    public MessageActivity? Activity { get; init; }
     public User Author { get; init; }
     public string? Content { get; init; }
     public string? Timestamp { get; init; }
@@ -54,6 +55,8 @@ public record Message
 
     public Attachment[] Attachments { get; init; }
     public Embed[]? Embeds { get; init; }
+    public Sticker[]? StickerItems { get; init; }
+    public Sticker[]? Stickers { get; init; }
     public Reaction[] Reactions { get; init; }
     public bool Pinned { get; init; }
     public ulong? WebhookId { get; init; }
@@ -69,6 +72,8 @@ public record Message
 
     public record Reference(ulong? GuildId, ulong? ChannelId, ulong? MessageId);
 
+    public record MessageActivity(int Type, string PartyId);
+
     public record Attachment
     {
         public ulong Id { get; init; }

Myriad/Types/Sticker.cs

@@ -0,0 +1,29 @@
+namespace Myriad.Types;
+
+public record Sticker
+{
+    public enum StickerType
+    {
+        STANDARD = 1,
+        GUILD = 2,
+    }
+
+    public enum StickerFormatType
+    {
+        PNG = 1,
+        APNG = 2,
+        LOTTIE = 3,
+    }
+
+    public ulong Id { get; init; }
+    public StickerType Type { get; init; }
+    public ulong? PackId { get; init; }
+    public string Name { get; init; }
+    public string? Description { get; init; }
+    public string Tags { get; init; }
+    public string Asset { get; init; }
+    public bool Available { get; init; }
+    public ulong? GuildId { get; init; }
+    public User? User { get; init; }
+    public int? SortValue { get; init; }
+}

PluralKit.Bot/Proxy/ProxyService.cs

@@ -115,6 +115,12 @@ public class ProxyService
         if (isMessageBlank && msg.Attachments.Length == 0)
             throw new ProxyChecksFailedException("Message cannot be blank.");
 
+        if (msg.Activity != null)
+            throw new ProxyChecksFailedException("Message contains an invite to an activity, which cannot be re-sent by PluralKit.");
+
+        if (msg.StickerItems != null) // && msg.StickerItems.Any(s => s.Type == Sticker.StickerType.GUILD && s.GuildId != msg.GuildId))
+            throw new ProxyChecksFailedException("Message contains stickers, which cannot be re-sent by PluralKit.");
+
         // All good!
         return true;
     }
@@ -158,6 +164,7 @@ public class ProxyService
             Attachments = trigger.Attachments,
             FileSizeLimit = guild.FileSizeLimit(),
             Embeds = embeds.ToArray(),
+            Stickers = trigger.StickerItems,
             AllowEveryone = allowEveryone
         });
         await HandleProxyExecutedActions(ctx, trigger, proxyMessage, match);

PluralKit.Bot/Services/WebhookExecutorService.cs

@@ -37,6 +37,7 @@ public record ProxyRequest
     public Message.Attachment[] Attachments { get; init; }
     public int FileSizeLimit { get; init; }
     public Embed[] Embeds { get; init; }
+    public Sticker[] Stickers { get; init; }
     public bool AllowEveryone { get; init; }
 }
 
@@ -115,7 +116,8 @@ public class WebhookExecutorService
             Content = content,
             AllowedMentions = allowedMentions,
             AvatarUrl = !string.IsNullOrWhiteSpace(req.AvatarUrl) ? req.AvatarUrl : null,
-            Embeds = req.Embeds
+            Embeds = req.Embeds,
+            Stickers = req.Stickers,
         };
 
         MultipartFile[] files = null;