From be00d5237f80081b9f314a60f17447dbe217c47b Mon Sep 17 00:00:00 2001
From: Laura Hausmann <laura@hausmann.dev>
Date: Sat, 17 Feb 2024 03:51:25 +0100
Subject: [PATCH] [backend/federation] Add To & Cc fields to create & update
 activities

---
 .../ActivityPub/ActivityRenderer.cs           | 16 ++++++--
 .../ActivityStreams/Types/ASActivity.cs       | 38 +++++++++++++++++++
 2 files changed, 50 insertions(+), 4 deletions(-)

diff --git a/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityRenderer.cs b/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityRenderer.cs
index 5e7e9307..2eadf3b2 100644
--- a/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityRenderer.cs
+++ b/Iceshrimp.Backend/Core/Federation/ActivityPub/ActivityRenderer.cs
@@ -16,14 +16,22 @@ public class ActivityRenderer(
 	private string GenerateActivityId() =>
 		$"https://{config.Value.WebDomain}/activities/{Guid.NewGuid().ToString().ToLowerInvariant()}";
 
-	public static ASCreate RenderCreate(ASObject obj, ASObject actor) => new()
+	public static ASCreate RenderCreate(ASNote obj, ASObject actor) => new()
 	{
-		Id = $"{obj.Id}#Create", Actor = ASActor.FromObject(actor), Object = obj
+		Id     = $"{obj.Id}#Create",
+		Actor  = ASActor.FromObject(actor),
+		Object = obj,
+		To     = obj.To,
+		Cc     = obj.Cc
 	};
 
-	public ASUpdate RenderUpdate(ASObject obj, ASObject actor) => new()
+	public ASUpdate RenderUpdate(ASNote obj, ASObject actor) => new()
 	{
-		Id = GenerateActivityId(), Actor = ASActor.FromObject(actor), Object = obj
+		Id     = GenerateActivityId(),
+		Actor  = ASActor.FromObject(actor),
+		Object = obj,
+		To     = obj.To,
+		Cc     = obj.Cc
 	};
 
 	public ASAccept RenderAccept(User followee, User follower, string requestId) => new()
diff --git a/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASActivity.cs b/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASActivity.cs
index a6408b02..e5e00378 100644
--- a/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASActivity.cs
+++ b/Iceshrimp.Backend/Core/Federation/ActivityStreams/Types/ASActivity.cs
@@ -1,6 +1,7 @@
 using Iceshrimp.Backend.Core.Configuration;
 using J = Newtonsoft.Json.JsonPropertyAttribute;
 using JC = Newtonsoft.Json.JsonConverterAttribute;
+using JI = Newtonsoft.Json.JsonIgnoreAttribute;
 
 namespace Iceshrimp.Backend.Core.Federation.ActivityStreams.Types;
 
@@ -33,6 +34,24 @@ public class ASActivity : ASObject
 public class ASCreate : ASActivity
 {
 	public ASCreate() => Type = Types.Create;
+
+	[J($"{Constants.ActivityStreamsNs}#to")]
+	public List<ASObjectBase>? To { get; set; }
+
+	[J($"{Constants.ActivityStreamsNs}#cc")]
+	public List<ASObjectBase>? Cc { get; set; }
+
+	[JI]
+	public new ASNote? Object
+	{
+		get => base.Object as ASNote;
+		set
+		{
+			base.Object = value;
+			To          = value?.To;
+			Cc          = value?.Cc;
+		}
+	}
 }
 
 public class ASDelete : ASActivity
@@ -73,6 +92,25 @@ public class ASLike : ASActivity
 public class ASUpdate : ASActivity
 {
 	public ASUpdate() => Type = Types.Update;
+
+	[J($"{Constants.ActivityStreamsNs}#to")]
+	public List<ASObjectBase>? To { get; set; }
+
+	[J($"{Constants.ActivityStreamsNs}#cc")]
+	public List<ASObjectBase>? Cc { get; set; }
+
+	[J($"{Constants.ActivityStreamsNs}#object")]
+	public new ASObject? Object
+	{
+		get => base.Object;
+		set
+		{
+			base.Object = value;
+			if (value is not ASNote note) return;
+			To = note.To;
+			Cc = note.Cc;
+		}
+	}
 }
 
 //TODO: add the rest