Expect channel parents to be null

DiscordChatExporter.Core/Discord/Data/Channel.cs

@@ -11,7 +11,7 @@ public partial record Channel(
     Snowflake Id,
     ChannelKind Kind,
     Snowflake GuildId,
-    Snowflake ParentId,
+    Snowflake? ParentId,
     string? ParentName,
     int? ParentPosition,
     ChannelCategory Category,
@@ -36,7 +36,7 @@ public partial record Channel
             json.GetPropertyOrNull("guild_id")?.GetNonWhiteSpaceStringOrNull()?.Pipe(Snowflake.Parse) ??
             Guild.DirectMessages.Id;
 
-        var parentId = json.GetProperty("parent_id").GetNonWhiteSpaceString().Pipe(Snowflake.Parse);
+        var parentId = json.GetPropertyOrNull("parent_id")?.GetNonWhiteSpaceStringOrNull()?.Pipe(Snowflake.Parse);
 
         var category = categoryHint ?? ChannelCategory.CreateDefault(kind);
 

DiscordChatExporter.Core/Discord/Data/ChannelThread.cs

@@ -10,7 +10,7 @@ public record ChannelThread(
     Snowflake Id,
     ChannelKind Kind,
     Snowflake GuildId,
-    Snowflake ParentId,
+    Snowflake? ParentId,
     string? ParentName,
     string Name,
     bool IsActive,
@@ -29,7 +29,6 @@ public record ChannelThread(
         var parentId = json.GetProperty("parent_id").GetNonWhiteSpaceString().Pipe(Snowflake.Parse);
         var name = json.GetProperty("name").GetNonWhiteSpaceString();
 
-
         var isActive = !json
             .GetPropertyOrNull("thread_metadata")?
             .GetPropertyOrNull("archived")?

DiscordChatExporter.Core/Discord/Data/Common/IChannel.cs

@@ -4,7 +4,7 @@ public interface IChannel : IHasId
 {
     ChannelKind Kind { get; }
     Snowflake GuildId { get; }
-    Snowflake ParentId { get; }
+    Snowflake? ParentId { get; }
     string? ParentName { get; }
     int? ParentPosition { get; }
     string Name { get; }

DiscordChatExporter.Core/Exporting/ExportRequest.cs

@@ -149,7 +149,7 @@ public partial class ExportRequest
             {
                 "%g" => guild.Id.ToString(),
                 "%G" => guild.Name,
-                "%t" => channel.ParentId.ToString(),
+                "%t" => channel.ParentId.ToString() ?? "",
                 "%T" => channel.ParentName ?? "",
                 "%c" => channel.Id.ToString(),
                 "%C" => channel.Name,