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✨ Activitypub supports reply and repost

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This commit is contained in:
LittleSheep
2026-01-01 13:37:29 +08:00
parent fb15930611
commit 7c5c92a501
5 changed files with 114 additions and 72 deletions
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54
DysonNetwork.Sphere/ActivityPub/ActivityPubObjectFactory.cs
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@@ -1,15 +1,22 @@
using System.Text;
using DysonNetwork.Shared.Models;
using Markdig;
using Microsoft.EntityFrameworkCore;
namespace DysonNetwork.Sphere.ActivityPub;
public static class ActivityPubObjectFactory
public class ActivityPubObjectFactory(IConfiguration configuration, AppDatabase db)
{
public static readonly string[] PublicTo = ["https://www.w3.org/ns/activitystreams#Public"];
public static readonly string PublicTo = "https://www.w3.org/ns/activitystreams#Public";
public static Dictionary<string, object> CreatePostObject(
IConfiguration configuration,
public async Task<SnFediverseActor?> GetLocalActorAsync(Guid publisherId)
{
return await db.FediverseActors
.Include(a => a.Instance)
.FirstOrDefaultAsync(a => a.PublisherId == publisherId);
}
public Dictionary<string, object> CreatePostObject(
SnPost post,
string actorUrl
)
@@ -44,6 +51,23 @@ public static class ActivityPubObjectFactory
var finalContent = contentBuilder.ToString();
var postReceivers = new List<string> { PublicTo };
if (post.RepliedPost != null)
{
// Local post
if (post.RepliedPost.Publisher != null)
{
var actor = GetLocalActorAsync(post.RepliedPost.PublisherId!.Value).GetAwaiter().GetResult();
if (actor?.FollowersUri != null)
postReceivers.Add(actor.FollowersUri);
}
// Fediverse post
if (post.Actor?.FollowersUri != null)
postReceivers.Add(post.Actor.FollowersUri);
}
var postObject = new Dictionary<string, object>
{
["id"] = postUrl,
@@ -51,7 +75,7 @@ public static class ActivityPubObjectFactory
["published"] = (post.PublishedAt ?? post.CreatedAt).ToDateTimeOffset(),
["attributedTo"] = actorUrl,
["content"] = Markdown.ToHtml(finalContent),
["to"] = PublicTo,
["to"] = postReceivers,
["cc"] = new[] { $"{actorUrl}/followers" },
["attachment"] = post.Attachments.Select(a => new Dictionary<string, object>
{
@@ -61,6 +85,26 @@ public static class ActivityPubObjectFactory
}).ToList<object>()
};
if (post.RepliedPost != null)
{
// Local post
if (post.RepliedPost.Publisher != null)
postObject["inReplyTo"] = $"https://{baseDomain}/posts/{post.RepliedPostId}";
// Fediverse post
if (post.RepliedPost.FediverseUri != null)
postObject["inReplyTo"] = post.RepliedPost.FediverseUri;
}
if (post.ForwardedPost != null)
{
// Local post
if (post.ForwardedPost.Publisher != null)
postObject["quoteUri"] = $"https://{baseDomain}/posts/{post.RepliedPostId}";
// Fediverse post
if (post.ForwardedPost.FediverseUri != null)
postObject["quoteUri"] = post.ForwardedPost.FediverseUri;
}
if (post.EditedAt.HasValue)
postObject["updated"] = post.EditedAt.Value.ToDateTimeOffset();