One StatusService behind both client APIs, with outbound likes and boosts

Domain/Statuses/StatusService takes a persona, not a root, and is what
/clientapi and the Mastodon API share:
- Publish renders Markdown (clientapi) or plain text (Mastodon clients),
  checks the persona may see the post it replies to, opens or reuses the
  conversation for a direct post from its recipients and mentions, fans
  out and hands the Create to the outbox;
- Edit keeps a revision and sends Update{Note}; Remove soft-deletes and
  returns the post, so a client can delete and redraft;
- Favourite and Reblog work on anything the persona can see and send Like,
  Announce and their Undo to the author (and, for boosts, to followers);
  boosts are refused for anything but public and unlisted posts.

PostsService is now the clientapi wrapper that checks the root owns the
persona. A persona's own boost is a local row: the outbox renders it as
Announce, /grunts/announce-{id} resolves, and object endpoints, profile
pages and NodeInfo skip it. ContentFormat gains Plain.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB

PrivaPub.Tests/Support/Harness.cs

@@ -6,6 +6,7 @@ using MongoDB.Entities;
 
 using PrivaPub.Domain.Content;
 using PrivaPub.Domain.Social;
+using PrivaPub.Domain.Statuses;
 using PrivaPub.Domain.Timelines;
 using PrivaPub.Federation.Actors;
 using PrivaPub.Federation.Inbox;
@@ -55,7 +56,8 @@ namespace PrivaPub.Tests.Support
 			Follows = new FollowService(Db, Local, Remote, Delivery, new KeyLocalizer<GenericRes>(), NullLogger<FollowService>.Instance);
 			Content = new ContentRenderer(Local, Remote);
 			Outbox = new OutboxPublisher(Db, Local, Delivery);
-			Posts = new PostsService(Db, Local, Remote, Delivery, Content, Outbox, Fanout, new KeyLocalizer<GenericRes>(), NullLogger<PostsService>.Instance);
+			Statuses = new StatusService(Db, Local, Remote, Delivery, Content, Outbox, Fanout);
+			Posts = new PostsService(Db, Local, Statuses, new KeyLocalizer<GenericRes>(), NullLogger<PostsService>.Instance);
 			Timelines = new TimelineService(Db, new KeyLocalizer<GenericRes>());
 		}
 
@@ -71,6 +73,7 @@ namespace PrivaPub.Tests.Support
 		public ContentRenderer Content { get; }
 		public OutboxPublisher Outbox { get; }
 		public PostsService Posts { get; }
+		public StatusService Statuses { get; }
 		public Fanout Fanout { get; }
 		public RemotePosts RemotePosts { get; }
 		public TimelineService Timelines { get; }

PrivaPub/Domain/Statuses/StatusService.cs

@@ -0,0 +1,489 @@
+using MongoDB.Driver;
+using MongoDB.Entities;
+
+using PrivaPub.Domain.Content;
+using PrivaPub.Domain.Privacy;
+using PrivaPub.Domain.Social;
+using PrivaPub.Domain.Timelines;
+using PrivaPub.Federation.Actors;
+using PrivaPub.Federation.Outbox;
+using PrivaPub.Federation.Rendering;
+using PrivaPub.Models.Federation;
+using PrivaPub.Models.Group;
+using PrivaPub.Models.Post;
+using PrivaPub.Models.Social;
+using PrivaPub.StaticServices;
+
+using System.Text.Json.Nodes;
+
+using PostEntity = PrivaPub.Models.Post.Post;
+
+namespace PrivaPub.Domain.Statuses
+{
+	public sealed class StatusDraft
+	{
+		public string Text { get; init; }
+		public bool PlainText { get; init; }
+		public string Title { get; init; }
+		public string SpoilerText { get; init; }
+		public bool Sensitive { get; init; }
+		public PostVisibility Visibility { get; init; } = PostVisibility.Public;
+		public string InReplyTo { get; init; }
+		public string GroupId { get; init; }
+		public string Language { get; init; }
+		public string ConversationId { get; init; }
+		public IReadOnlyList<string> Recipients { get; init; } = Array.Empty<string>();
+	}
+
+	public sealed record StatusOutcome(PostEntity Post, int Status = StatusCodes.Status200OK, string Error = default)
+	{
+		public bool Ok => Error == default;
+		public static StatusOutcome Fail(int status, string error) => new(default, status, error);
+	}
+
+	public interface IStatusService
+	{
+		Task<StatusOutcome> Publish(LocalActor author, StatusDraft draft, CancellationToken token);
+		Task<StatusOutcome> Edit(LocalActor author, string postId, StatusDraft draft, CancellationToken token);
+		Task<StatusOutcome> Remove(LocalActor author, string postId, CancellationToken token);
+		Task<StatusOutcome> Favourite(LocalActor me, string postId, bool on, CancellationToken token);
+		Task<StatusOutcome> Reblog(LocalActor me, string postId, bool on, PostVisibility visibility, CancellationToken token);
+	}
+
+	public class StatusService : IStatusService
+	{
+		const int MaxRevisions = 20;
+
+		readonly DbEntities _dbEntities;
+		readonly ILocalActorService _localActors;
+		readonly IRemoteActorService _remoteActors;
+		readonly IDeliveryService _delivery;
+		readonly IContentRenderer _content;
+		readonly IOutboxPublisher _outbox;
+		readonly IFanout _fanout;
+
+		public StatusService(DbEntities dbEntities, ILocalActorService localActors, IRemoteActorService remoteActors, IDeliveryService delivery,
+			IContentRenderer content, IOutboxPublisher outbox, IFanout fanout)
+		{
+			_dbEntities = dbEntities;
+			_localActors = localActors;
+			_remoteActors = remoteActors;
+			_delivery = delivery;
+			_content = content;
+			_outbox = outbox;
+			_fanout = fanout;
+		}
+
+		public async Task<StatusOutcome> Publish(LocalActor author, StatusDraft draft, CancellationToken token)
+		{
+			if (string.IsNullOrWhiteSpace(draft.Text))
+				return StatusOutcome.Fail(StatusCodes.Status422UnprocessableEntity, "Validation failed: Text can't be blank");
+
+			LocalActor group = default;
+			if (!string.IsNullOrEmpty(draft.GroupId))
+			{
+				var groupEntity = await _dbEntities.Groups.MatchID(draft.GroupId).ExecuteFirstAsync(token);
+				if (groupEntity == default || groupEntity.DeletionAt.HasValue || !groupEntity.Members.Any(m => !m.IsForeign && m.AvatarId == author.Id))
+					return StatusOutcome.Fail(StatusCodes.Status404NotFound, "Group not found");
+				group = _localActors.FromGroup(groupEntity);
+			}
+
+			var parent = await Parent(draft.InReplyTo, token);
+			if (!string.IsNullOrEmpty(draft.InReplyTo) && parent == default && !IsRemoteUri(draft.InReplyTo))
+				return StatusOutcome.Fail(StatusCodes.Status404NotFound, "Record not found");
+			if (parent != default && !await VisibilityPolicy.CanSee(parent, author.Id, token))
+				return StatusOutcome.Fail(StatusCodes.Status404NotFound, "Record not found");
+
+			var rendered = draft.PlainText ? await _content.PlainText(draft.Text, token) : await _content.Markdown(draft.Text, token);
+			var isLocalOnly = group is { IsFederated: false };
+			var visibility = isLocalOnly ? PostVisibility.Circle : draft.Visibility is PostVisibility.Circle or PostVisibility.LocalGeo ? PostVisibility.Public : draft.Visibility;
+			var post = new PostEntity
+			{
+				GroupUserId = author.Id,
+				AuthorAccountId = author.Id,
+				GroupId = group?.Id,
+				Visibility = visibility,
+				Title = Clean(draft.Title),
+				SpoilerText = Clean(draft.SpoilerText),
+				HasContentWarning = draft.Sensitive || Clean(draft.SpoilerText) != default,
+				Text = draft.Text,
+				ContentHtml = rendered.Html,
+				ContentFormat = draft.PlainText ? ContentFormat.Plain : ContentFormat.Markdown,
+				Language = Clean(draft.Language),
+				Mentions = rendered.Mentions.Select(ToMention).ToList(),
+				Tags = rendered.Tags.ToList(),
+				AnsweringToPostId = parent?.ID,
+				InReplyToURI = parent?.ObjectURI ?? (IsRemoteUri(draft.InReplyTo) ? draft.InReplyTo : default),
+				InReplyToAccountId = parent?.AuthorAccountId ?? parent?.GroupUserId,
+				IsLocalOnly = isLocalOnly,
+				ActorURI = author.Uri
+			};
+			post.ID = (string)post.GenerateNewID();
+			post.ObjectURI = author.PostUri(post.ID);
+			post.Url = author.PostHtmlUrl(post.ID);
+
+			JsonObject create = default;
+			if (visibility == PostVisibility.Direct)
+			{
+				var conversation = await Conversation(author, draft, rendered.Mentions, token);
+				if (!conversation.Ok)
+					return StatusOutcome.Fail(conversation.Status, conversation.Error);
+				var (dmGroup, recipients) = (conversation.Group, conversation.Recipients);
+				post.ConversationId = dmGroup.ID;
+				post.ContextURI = dmGroup.ConversationURI;
+				post.Mentions = recipients.Select(r => new PostMention { ActorURI = r.Uri, Handle = "@" + r.Handle, IsLocal = r.LocalId != default, AccountId = r.LocalId ?? r.ForeignId })
+					.Concat(post.Mentions)
+					.DistinctBy(m => m.ActorURI)
+					.ToList();
+				var note = ActivityPubRenderer.DirectNote(post, author, recipients.Select(r => (r.Uri, r.Handle)).ToList(), dmGroup.ConversationURI);
+				create = ActivityPubRenderer.Create(author, note, $"create-{post.ID}");
+				post.To = Strings(note["to"]);
+				await DB.Default.Update<DmGroup>().MatchID(dmGroup.ID).Modify(g => g.UpdatedAt, DateTime.UtcNow).ExecuteAsync(token);
+			}
+			else if (!isLocalOnly)
+			{
+				var note = ActivityPubRenderer.Note(post, author, group, post.InReplyToURI);
+				create = ActivityPubRenderer.Create(author, note, $"create-{post.ID}");
+				post.To = Strings(note["to"]);
+				post.Cc = Strings(note["cc"]);
+			}
+			post.ActivityURI = create?["id"]?.GetValue<string>();
+
+			await DB.Default.SaveAsync(post, token);
+			if (parent != default)
+				await DB.Default.Update<PostEntity>().MatchID(parent.ID).Modify(b => b.Inc(p => p.RepliesCount, 1)).ExecuteAsync(token);
+			await _fanout.Distribute(post, token);
+			if (create != default)
+				await _outbox.Publish(author, post, create, token);
+			if (group is { IsFederated: true } && visibility is PostVisibility.Public or PostVisibility.Unlisted)
+				await _delivery.EnqueueToFollowers(group, ActivityPubRenderer.Announce(group, post.ObjectURI, $"announce-{post.ID}"), token);
+			return new StatusOutcome(post);
+		}
+
+		public async Task<StatusOutcome> Edit(LocalActor author, string postId, StatusDraft draft, CancellationToken token)
+		{
+			var post = await Own(author, postId, token);
+			if (post == default)
+				return StatusOutcome.Fail(StatusCodes.Status404NotFound, "Record not found");
+			if (string.IsNullOrWhiteSpace(draft.Text))
+				return StatusOutcome.Fail(StatusCodes.Status422UnprocessableEntity, "Validation failed: Text can't be blank");
+
+			post.Revisions.Add(new PostRevision
+			{
+				Title = post.Title,
+				SpoilerText = post.SpoilerText,
+				ContentHtml = post.ContentHtml,
+				HasContentWarning = post.HasContentWarning,
+				EditedAt = post.EditedAt ?? post.CreationDate
+			});
+			if (post.Revisions.Count > MaxRevisions)
+				post.Revisions.RemoveRange(0, post.Revisions.Count - MaxRevisions);
+
+			var plain = draft.PlainText || post.ContentFormat == ContentFormat.Plain;
+			var rendered = plain ? await _content.PlainText(draft.Text, token) : await _content.Markdown(draft.Text, token);
+			post.Title = draft.Title == default ? post.Title : Clean(draft.Title);
+			post.SpoilerText = Clean(draft.SpoilerText);
+			post.HasContentWarning = draft.Sensitive || post.SpoilerText != default;
+			post.Text = draft.Text;
+			post.ContentHtml = rendered.Html;
+			post.Language = Clean(draft.Language) ?? post.Language;
+			post.Mentions = post.Visibility == PostVisibility.Direct
+				? post.Mentions.Concat(rendered.Mentions.Select(ToMention)).DistinctBy(m => m.ActorURI).ToList()
+				: rendered.Mentions.Select(ToMention).ToList();
+			post.Tags = rendered.Tags.ToList();
+			post.EditedAt = DateTime.UtcNow;
+			post.UpdateDate = post.EditedAt;
+			await DB.Default.SaveAsync(post, token);
+
+			if (!post.IsLocalOnly)
+			{
+				var group = string.IsNullOrEmpty(post.GroupId) ? default : await _localActors.FindById(LocalActorKind.Group, post.GroupId, token);
+				var note = post.Visibility == PostVisibility.Direct
+					? ActivityPubRenderer.DirectNote(post, author, Array.Empty<(string, string)>(), post.ContextURI)
+					: ActivityPubRenderer.Note(post, author, group, post.InReplyToURI);
+				note["to"] = new JsonArray(post.To.Select(t => (JsonNode)t).ToArray());
+				note["cc"] = new JsonArray(post.Cc.Select(c => (JsonNode)c).ToArray());
+				var update = new JsonObject
+				{
+					["@context"] = ActivityPubRenderer.Context(),
+					["id"] = author.ActivityUri($"update-{post.ID}-{new DateTimeOffset(post.EditedAt.Value).ToUnixTimeSeconds()}"),
+					["type"] = "Update",
+					["actor"] = author.Uri,
+					["to"] = note["to"]!.DeepClone(),
+					["cc"] = note["cc"]!.DeepClone(),
+					["object"] = note
+				};
+				await _outbox.Publish(author, post, update, token);
+			}
+			return new StatusOutcome(post);
+		}
+
+		public async Task<StatusOutcome> Remove(LocalActor author, string postId, CancellationToken token)
+		{
+			var post = await _dbEntities.Posts.Match(p => p.ID == postId && p.GroupUserId == author.Id && !p.IsFederatedCopy).ExecuteFirstAsync(token);
+			if (post == default || post.DeletedAt.HasValue)
+				return StatusOutcome.Fail(StatusCodes.Status404NotFound, "Record not found");
+			if (post.ReblogOfPostId != default)
+				return await Reblog(author, post.ReblogOfPostId, false, post.Visibility, token);
+
+			var audience = await _outbox.Audience(author, post, token);
+			await DB.Default.Update<PostEntity>().MatchID(post.ID)
+				.Modify(p => p.DeletedAt, DateTime.UtcNow)
+				.Modify(p => p.Text, null)
+				.Modify(p => p.ContentHtml, null)
+				.Modify(p => p.Title, null)
+				.Modify(p => p.SpoilerText, null)
+				.Modify(p => p.Media, new List<PostMedia>())
+				.Modify(p => p.Revisions, new List<PostRevision>())
+				.ExecuteAsync(token);
+			await DB.Default.DeleteAsync<TimelineEntry>(e => e.PostId == post.ID || e.ReblogOfPostId == post.ID);
+			if (!string.IsNullOrEmpty(post.AnsweringToPostId))
+				await DB.Default.Update<PostEntity>().MatchID(post.AnsweringToPostId).Modify(b => b.Inc(p => p.RepliesCount, -1)).ExecuteAsync(token);
+			if (audience.Count > 0)
+			{
+				var delete = ActivityPubRenderer.Delete(author, post.ObjectURI, $"delete-{post.ID}",
+					new JsonArray(post.To.Select(t => (JsonNode)t).ToArray()), new JsonArray(post.Cc.Select(c => (JsonNode)c).ToArray()));
+				await _delivery.Enqueue(author, audience, delete, token);
+			}
+			return new StatusOutcome(post);
+		}
+
+		public async Task<StatusOutcome> Favourite(LocalActor me, string postId, bool on, CancellationToken token)
+		{
+			var post = await Visible(me, postId, token);
+			if (post == default)
+				return StatusOutcome.Fail(StatusCodes.Status404NotFound, "Record not found");
+
+			var activityId = me.ActivityUri($"like-{post.ID}");
+			if (on)
+			{
+				try
+				{
+					await DB.Default.SaveAsync(new Favourite { AccountId = me.Id, ActorURI = me.Uri, PostId = post.ID, ActivityURI = activityId }, token);
+				}
+				catch (MongoWriteException ex) when (ex.WriteError?.Category == ServerErrorCategory.DuplicateKey)
+				{
+					return new StatusOutcome(post);
+				}
+				await DB.Default.Update<PostEntity>().MatchID(post.ID).Modify(b => b.Inc(p => p.FavouritesCount, 1)).ExecuteAsync(token);
+				post.FavouritesCount++;
+				if (!post.IsFederatedCopy)
+					await Notifications.Add(post.GroupUserId, NotificationType.Favourite, me.Id, me.Uri, post.ID, token);
+			}
+			else
+			{
+				var removed = await DB.Default.DeleteAsync<Favourite>(f => f.AccountId == me.Id && f.PostId == post.ID);
+				if (removed.DeletedCount == 0)
+					return new StatusOutcome(post);
+				await DB.Default.Update<PostEntity>().MatchID(post.ID).Modify(b => b.Inc(p => p.FavouritesCount, -1)).ExecuteAsync(token);
+				post.FavouritesCount--;
+			}
+
+			if (post.IsFederatedCopy && await AuthorInbox(post, token) is { } inbox)
+			{
+				var like = new JsonObject
+				{
+					["@context"] = ActivityPubRenderer.ActivityStreams,
+					["id"] = activityId,
+					["type"] = "Like",
+					["actor"] = me.Uri,
+					["object"] = post.ObjectURI
+				};
+				await _delivery.Enqueue(me, new[] { inbox }, on ? like : Undo(me, like, $"undo-like-{post.ID}-{DateTimeOffset.UtcNow.ToUnixTimeSeconds()}"), token);
+			}
+			return new StatusOutcome(post);
+		}
+
+		public async Task<StatusOutcome> Reblog(LocalActor me, string postId, bool on, PostVisibility visibility, CancellationToken token)
+		{
+			var original = await Visible(me, postId, token);
+			if (original?.ReblogOfPostId != default)
+				original = await Visible(me, original.ReblogOfPostId, token);
+			if (original == default)
+				return StatusOutcome.Fail(StatusCodes.Status404NotFound, "Record not found");
+			if (original.Visibility is not (PostVisibility.Public or PostVisibility.Unlisted))
+				return StatusOutcome.Fail(StatusCodes.Status422UnprocessableEntity, "Validation failed: This post can't be boosted");
+
+			var existing = await _dbEntities.Posts.Match(p => p.ReblogOfPostId == original.ID && p.AuthorAccountId == me.Id && !p.DeletedAt.HasValue).ExecuteFirstAsync(token);
+			var announceId = me.ActivityUri($"announce-{original.ID}");
+			var announce = new JsonObject
+			{
+				["@context"] = ActivityPubRenderer.ActivityStreams,
+				["id"] = announceId,
+				["type"] = "Announce",
+				["actor"] = me.Uri,
+				["published"] = ActivityPubRenderer.Timestamp(DateTime.UtcNow),
+				["to"] = new JsonArray(visibility == PostVisibility.Unlisted ? me.Followers : ActivityPubRenderer.Public),
+				["cc"] = new JsonArray(visibility == PostVisibility.Unlisted ? ActivityPubRenderer.Public : me.Followers, original.ActorURI),
+				["object"] = original.ObjectURI
+			};
+
+			if (on)
+			{
+				if (existing != default)
+					return new StatusOutcome(existing);
+				var reblog = new PostEntity
+				{
+					GroupUserId = me.Id,
+					AuthorAccountId = me.Id,
+					ReblogOfPostId = original.ID,
+					Visibility = visibility == PostVisibility.Unlisted ? PostVisibility.Unlisted : PostVisibility.Public,
+					ObjectURI = announceId,
+					ActivityURI = announceId,
+					ActorURI = me.Uri,
+					To = Strings(announce["to"]),
+					Cc = Strings(announce["cc"])
+				};
+				try
+				{
+					await DB.Default.SaveAsync(reblog, token);
+				}
+				catch (MongoWriteException ex) when (ex.WriteError?.Category == ServerErrorCategory.DuplicateKey)
+				{
+					return new StatusOutcome(await _dbEntities.Posts.Match(p => p.ObjectURI == announceId).ExecuteFirstAsync(token));
+				}
+				await DB.Default.Update<PostEntity>().MatchID(original.ID).Modify(b => b.Inc(p => p.ReblogsCount, 1)).ExecuteAsync(token);
+				if (!original.IsFederatedCopy)
+					await Notifications.Add(original.GroupUserId, NotificationType.Reblog, me.Id, me.Uri, original.ID, token);
+				await _fanout.Distribute(reblog, token);
+				await _delivery.EnqueueToFollowers(me, announce, token, await AuthorInbox(original, token) is { } inbox ? new[] { inbox } : default);
+				return new StatusOutcome(reblog);
+			}
+
+			if (existing == default)
+				return new StatusOutcome(original);
+			await DB.Default.DeleteAsync<PostEntity>(existing.ID);
+			await DB.Default.DeleteAsync<TimelineEntry>(e => e.PostId == existing.ID);
+			await DB.Default.Update<PostEntity>().MatchID(original.ID).Modify(b => b.Inc(p => p.ReblogsCount, -1)).ExecuteAsync(token);
+			await _delivery.EnqueueToFollowers(me, Undo(me, announce, $"undo-announce-{original.ID}-{DateTimeOffset.UtcNow.ToUnixTimeSeconds()}"), token,
+				await AuthorInbox(original, token) is { } authorInbox ? new[] { authorInbox } : default);
+			return new StatusOutcome(original);
+		}
+
+		sealed record Recipient(string Uri, string Handle, string LocalId, string ForeignId, string Inbox);
+
+		sealed record ConversationResult(DmGroup Group, IReadOnlyList<Recipient> Recipients, int Status = StatusCodes.Status200OK, string Error = default)
+		{
+			public bool Ok => Error == default;
+		}
+
+		async Task<ConversationResult> Conversation(LocalActor author, StatusDraft draft, IReadOnlyList<ResolvedMention> mentioned, CancellationToken token)
+		{
+			DmGroup dmGroup = default;
+			if (!string.IsNullOrEmpty(draft.ConversationId))
+			{
+				dmGroup = await _dbEntities.DmGroups.MatchID(draft.ConversationId).ExecuteFirstAsync(token);
+				if (dmGroup == default || !dmGroup.Members.Any(m => !m.IsForeign && m.AvatarId == author.Id))
+					return new(default, default, StatusCodes.Status404NotFound, "Conversation not found");
+			}
+			else
+			{
+				var members = new List<GroupMember> { new() { AvatarId = author.Id } };
+				foreach (var handle in draft.Recipients.Distinct(StringComparer.OrdinalIgnoreCase))
+				{
+					var member = await ResolveRecipient(handle, token);
+					if (member == default)
+						return new(default, default, StatusCodes.Status404NotFound, $"Recipient '{handle}' not found");
+					if (members.All(m => m.AvatarId != member.AvatarId))
+						members.Add(member);
+				}
+				foreach (var mention in mentioned.Where(m => m.AccountId != author.Id))
+				{
+					var member = mention.IsLocal ? new GroupMember { AvatarId = mention.AccountId } : new GroupMember { AvatarId = mention.ActorUri, IsForeign = true };
+					if (members.All(m => m.AvatarId != member.AvatarId))
+						members.Add(member);
+				}
+				if (members.Count < 2)
+					return new(default, default, StatusCodes.Status422UnprocessableEntity, "Validation failed: A direct message needs at least one recipient");
+
+				var key = DmGroup.KeyOf(members);
+				dmGroup = await _dbEntities.DmGroups.Match(g => g.ParticipantsKey == key && !g.DeletionAt.HasValue).ExecuteFirstAsync(token);
+				if (dmGroup == default)
+				{
+					dmGroup = new DmGroup { Members = members, ParticipantsKey = key };
+					dmGroup.ID = (string)dmGroup.GenerateNewID();
+					dmGroup.ConversationURI = author.ConversationUri(dmGroup.ID);
+					await DB.Default.SaveAsync(dmGroup, token);
+				}
+			}
+
+			var recipients = new List<Recipient>();
+			foreach (var member in dmGroup.Members.Where(m => !(m.AvatarId == author.Id && !m.IsForeign)))
+			{
+				if (member.IsForeign)
+				{
+					var foreign = await _dbEntities.ForeignAvatars.Match(a => a.ActorURI == member.AvatarId).ExecuteFirstAsync(token);
+					if (foreign != default)
+						recipients.Add(new Recipient(foreign.ActorURI, $"{foreign.UserName}@{foreign.Domain}", default, foreign.ID, foreign.InboxURL));
+				}
+				else if (await _localActors.FindById(LocalActorKind.Person, member.AvatarId, token) is { } local)
+					recipients.Add(new Recipient(local.Uri, local.Handle, local.Id, default, default));
+			}
+			return new(dmGroup, recipients);
+		}
+
+		async Task<GroupMember> ResolveRecipient(string recipient, CancellationToken token)
+		{
+			var handle = recipient.Trim().TrimStart('@');
+			if (!handle.Contains('@') || handle.EndsWith("@" + new Uri(_localActors.BaseAddress).Authority, StringComparison.OrdinalIgnoreCase))
+			{
+				var local = await _localActors.FindByUserName(handle.Split('@')[0], token);
+				return local is { Kind: LocalActorKind.Person } ? new GroupMember { AvatarId = local.Id } : default;
+			}
+			var actorUri = await _remoteActors.ResolveHandle(handle, token);
+			var foreign = actorUri == default ? default : await _remoteActors.GetActor(actorUri, refresh: false, token);
+			return foreign == default ? default : new GroupMember { AvatarId = foreign.ActorURI, IsForeign = true };
+		}
+
+		async Task<PostEntity> Parent(string reference, CancellationToken token)
+		{
+			if (string.IsNullOrEmpty(reference))
+				return default;
+			return IsRemoteUri(reference)
+				? await _dbEntities.Posts.Match(p => p.ObjectURI == reference && !p.DeletedAt.HasValue).ExecuteFirstAsync(token)
+				: await _dbEntities.Posts.Match(p => p.ID == reference && !p.DeletedAt.HasValue).ExecuteFirstAsync(token);
+		}
+
+		async Task<PostEntity> Own(LocalActor author, string postId, CancellationToken token) =>
+			await _dbEntities.Posts.Match(p => p.ID == postId && p.GroupUserId == author.Id && !p.IsFederatedCopy && !p.DeletedAt.HasValue && p.ReblogOfPostId == null)
+				.ExecuteFirstAsync(token);
+
+		async Task<PostEntity> Visible(LocalActor me, string postId, CancellationToken token)
+		{
+			var post = string.IsNullOrEmpty(postId) ? default : await _dbEntities.Posts.Match(p => p.ID == postId && !p.DeletedAt.HasValue).ExecuteFirstAsync(token);
+			return post != default && await VisibilityPolicy.CanSee(post, me.Id, token) ? post : default;
+		}
+
+		async Task<string> AuthorInbox(PostEntity post, CancellationToken token)
+		{
+			if (!post.IsFederatedCopy || string.IsNullOrEmpty(post.AuthorAccountId))
+				return default;
+			return (await _dbEntities.ForeignAvatars.MatchID(post.AuthorAccountId).ExecuteFirstAsync(token))?.InboxURL;
+		}
+
+		static JsonObject Undo(LocalActor actor, JsonObject inner, string activityId) => new()
+		{
+			["@context"] = ActivityPubRenderer.ActivityStreams,
+			["id"] = actor.ActivityUri(activityId),
+			["type"] = "Undo",
+			["actor"] = actor.Uri,
+			["object"] = inner.DeepClone()
+		};
+
+		static PostMention ToMention(ResolvedMention mention) => new()
+		{
+			ActorURI = mention.ActorUri,
+			Handle = "@" + mention.Handle,
+			IsLocal = mention.IsLocal,
+			AccountId = mention.AccountId
+		};
+
+		static bool IsRemoteUri(string reference) =>
+			reference != default && (reference.StartsWith("https://", StringComparison.OrdinalIgnoreCase) || reference.StartsWith("http://", StringComparison.OrdinalIgnoreCase));
+
+		static string Clean(string value) => string.IsNullOrWhiteSpace(value) ? default : value.Trim();
+
+		static List<string> Strings(JsonNode node) =>
+			node is JsonArray array ? array.Select(n => n?.GetValue<string>()).Where(s => s != default).ToList() : new List<string>();
+	}
+}

PrivaPub/Federation/Controllers/PeasantsController.cs

@@ -80,6 +80,12 @@ namespace PrivaPub.Federation.Controllers
 					items.Add(ActivityPubRenderer.Announce(local, post.ObjectURI, $"announce-{post.ID}"));
 					continue;
 				}
+				if (post.ReblogOfPostId != default)
+				{
+					if (await AnnounceFor(post, token) is { } announce)
+						items.Add(announce);
+					continue;
+				}
 				items.Add(await CreateFor(post, local, token));
 			}
 
@@ -124,6 +130,14 @@ namespace PrivaPub.Federation.Controllers
 		[HttpGet, Route("{actor}/grunts/{activityId}")]
 		public async Task<IActionResult> Grunt(string actor, string activityId, CancellationToken token)
 		{
+			if (activityId.StartsWith("announce-", StringComparison.Ordinal))
+			{
+				var booster = await _localActors.FindByUserName(actor, token);
+				var uri = booster?.ActivityUri(activityId);
+				var reblog = uri == default ? default : await _dbEntities.Posts.Match(p => p.ObjectURI == uri && !p.DeletedAt.HasValue).ExecuteFirstAsync(token);
+				var rendered = reblog == default ? default : await AnnounceFor(reblog, token);
+				return rendered == default ? NotFound() : Activity(rendered);
+			}
 			if (!activityId.StartsWith("create-", StringComparison.Ordinal))
 				return NotFound();
 			var (local, post) = await PublicPost(actor, activityId["create-".Length..], token);
@@ -153,7 +167,7 @@ namespace PrivaPub.Federation.Controllers
 			if (local is not { IsFederated: true, Kind: LocalActorKind.Person })
 				return default;
 			var post = await _dbEntities.Posts
-				.Match(p => p.ID == postId && p.GroupUserId == local.Id && !p.IsFederatedCopy)
+				.Match(p => p.ID == postId && p.GroupUserId == local.Id && !p.IsFederatedCopy && p.ReblogOfPostId == null)
 				.Match(VisibilityPolicy.IsPublic)
 				.ExecuteFirstAsync(token);
 			return (local, post);
@@ -181,6 +195,24 @@ namespace PrivaPub.Federation.Controllers
 			return new ContentResult { Content = tombstone.ToJsonString(), ContentType = ActivityContentType, StatusCode = StatusCodes.Status410Gone };
 		}
 
+		async Task<JsonObject> AnnounceFor(PostEntity reblog, CancellationToken token)
+		{
+			var original = await _dbEntities.Posts.MatchID(reblog.ReblogOfPostId).ExecuteFirstAsync(token);
+			if (original == default || original.DeletedAt.HasValue)
+				return default;
+			return new JsonObject
+			{
+				["@context"] = ActivityPubRenderer.ActivityStreams,
+				["id"] = reblog.ObjectURI,
+				["type"] = "Announce",
+				["actor"] = reblog.ActorURI,
+				["published"] = ActivityPubRenderer.Timestamp(reblog.CreationDate),
+				["to"] = new JsonArray(reblog.To.Select(t => (JsonNode)t).ToArray()),
+				["cc"] = new JsonArray(reblog.Cc.Select(c => (JsonNode)c).ToArray()),
+				["object"] = original.ObjectURI
+			};
+		}
+
 		async Task<JsonObject> CreateFor(PostEntity post, LocalActor author, CancellationToken token)
 		{
 			var group = string.IsNullOrEmpty(post.GroupId) ? default : await _localActors.FindById(LocalActorKind.Group, post.GroupId, token);

PrivaPub/Federation/Controllers/WellKnownController.cs

@@ -85,7 +85,7 @@ namespace PrivaPub.Federation.Controllers
 		public async Task<IActionResult> NodeInfo(string version, CancellationToken token)
 		{
 			var users = await DB.Default.CountAsync<Avatar>(a => !a.DeletionAt.HasValue, token);
-			var posts = await DB.Default.CountAsync<PostEntity>(f => f.Where(p => !p.IsFederatedCopy) & f.Where(VisibilityPolicy.IsPublic), token);
+			var posts = await DB.Default.CountAsync<PostEntity>(f => f.Where(p => !p.IsFederatedCopy && p.ReblogOfPostId == null) & f.Where(VisibilityPolicy.IsPublic), token);
 			var software = new JsonObject { ["name"] = "privapub", ["version"] = BuildInfo.Ref };
 			if (version == "2.1")
 			{

PrivaPub/Middleware/SocialPubConfigurations.cs

@@ -20,6 +20,7 @@ using PrivaPub.Federation.Moderation;
 using PrivaPub.Federation.Inbox.Handlers;
 using PrivaPub.Domain.Content;
 using PrivaPub.Domain.Social;
+using PrivaPub.Domain.Statuses;
 using PrivaPub.Domain.Timelines;
 using PrivaPub.Infrastructure.Http;
 using PrivaPub.Infrastructure.Jobs;
@@ -136,6 +137,7 @@ namespace PrivaPub.Middleware
 				.AddTransient<IPrivateAvatarUsersService, PrivateAvatarUsersService>()
 				.AddTransient<IGroupUsersService, GroupUsersService>()
 				.AddTransient<IPostsService, PostsService>()
+				.AddTransient<IStatusService, StatusService>()
 				.AddTransient<IFollowService, FollowService>()
 				.AddTransient<ITimelineService, TimelineService>()
 				.AddSingleton<AppConfigurationService>()

PrivaPub/Models/Post/ContentFormat.cs

@@ -3,6 +3,7 @@ namespace PrivaPub.Models.Post
 	public enum ContentFormat
 	{
 		Markdown,
-		Html
+		Html,
+		Plain
 	}
 }

PrivaPub/Services/PostsService.cs

@@ -14,7 +14,7 @@ using PrivaPub.StaticServices;
 using System.Text.Json.Nodes;
 
 using PostEntity = PrivaPub.Models.Post.Post;
-using PrivaPub.Domain.Content;
+using PrivaPub.Domain.Statuses;
 using PrivaPub.Domain.Timelines;
 using PrivaPub.Federation.Actors;
 using PrivaPub.Federation.Rendering;
@@ -38,225 +38,62 @@ namespace PrivaPub.Services
 
 		readonly DbEntities _dbEntities;
 		readonly ILocalActorService _localActors;
-		readonly IRemoteActorService _remoteActors;
-		readonly IDeliveryService _delivery;
-		readonly IContentRenderer _content;
-		readonly IOutboxPublisher _outbox;
-		readonly IFanout _fanout;
+		readonly IStatusService _statuses;
 		readonly IStringLocalizer<GenericRes> _localizer;
 		readonly ILogger<PostsService> _logger;
 
 		public PostsService(DbEntities dbEntities,
 			ILocalActorService localActors,
-			IRemoteActorService remoteActors,
-			IDeliveryService delivery,
-			IContentRenderer content,
-			IOutboxPublisher outbox,
-			IFanout fanout,
+			IStatusService statuses,
 			IStringLocalizer<GenericRes> localizer,
 			ILogger<PostsService> logger)
 		{
 			_dbEntities = dbEntities;
 			_localActors = localActors;
-			_remoteActors = remoteActors;
-			_delivery = delivery;
-			_content = content;
-			_outbox = outbox;
-			_fanout = fanout;
+			_statuses = statuses;
 			_localizer = localizer;
 			_logger = logger;
 		}
 
 		public async Task<WebResult> InsertPost(string rootUserId, InsertPostForm form, CancellationToken token)
-		{
-			var result = new WebResult();
-			try
 		{
 			var author = await OwnedAvatar(rootUserId, form.AvatarId, token);
 			if (author == default)
-					return result.Invalidate(_localizer["Avatar not found."], StatusCodes.Status404NotFound);
-
-				LocalActor group = default;
-				var isLocalOnly = false;
-				if (!string.IsNullOrEmpty(form.GroupId))
+				return new WebResult().Invalidate(_localizer["Avatar not found."], StatusCodes.Status404NotFound);
+			return await Answer(() => _statuses.Publish(author, new StatusDraft
 			{
-					var groupEntity = await _dbEntities.Groups.MatchID(form.GroupId).ExecuteFirstAsync(token);
-					if (groupEntity == default || groupEntity.DeletionAt.HasValue
-						|| !groupEntity.Members.Any(m => !m.IsForeign && m.AvatarId == form.AvatarId))
-						return result.Invalidate(_localizer["Group not found."], StatusCodes.Status404NotFound);
-					group = _localActors.FromGroup(groupEntity);
-					isLocalOnly = !group.IsFederated;
-				}
-
-				var parent = await Parent(form.AnsweringToPostId, token);
-				var rendered = await _content.Markdown(form.Text, token);
-				var post = new PostEntity
-				{
-					GroupUserId = author.Id,
-					AuthorAccountId = author.Id,
-					GroupId = group?.Id,
-					Visibility = isLocalOnly ? PostVisibility.Circle : LocalVisibility(form.Visibility),
-					Title = form.Title,
-					SpoilerText = string.IsNullOrWhiteSpace(form.SpoilerText) ? default : form.SpoilerText.Trim(),
 				Text = form.Text,
-					ContentHtml = rendered.Html,
-					ContentFormat = ContentFormat.Markdown,
-					Mentions = rendered.Mentions.Select(ToMention).ToList(),
-					Tags = rendered.Tags.ToList(),
-					HasContentWarning = form.HasContentWarning || !string.IsNullOrWhiteSpace(form.SpoilerText),
-					AnsweringToPostId = parent?.ID,
-					InReplyToURI = parent?.ObjectURI ?? RemoteUri(form.AnsweringToPostId),
-					InReplyToAccountId = parent?.AuthorAccountId ?? parent?.GroupUserId,
-					IsLocalOnly = isLocalOnly,
-					ActorURI = author.Uri
-				};
-				post.ID = (string)post.GenerateNewID();
-				post.ObjectURI = author.PostUri(post.ID);
-				post.Url = author.PostHtmlUrl(post.ID);
-
-				if (isLocalOnly)
-				{
-					await DB.Default.SaveAsync(post, token);
-					await _fanout.Distribute(post, token);
-					result.Data = ToView(post);
-					return result;
-				}
-
-				var note = ActivityPubRenderer.Note(post, author, group, post.InReplyToURI);
-				var create = ActivityPubRenderer.Create(author, note, $"create-{post.ID}");
-				post.ActivityURI = create["id"]!.GetValue<string>();
-				post.To = Strings(note["to"]);
-				post.Cc = Strings(note["cc"]);
-				await DB.Default.SaveAsync(post, token);
-				if (parent != default)
-					await DB.Default.Update<PostEntity>().MatchID(parent.ID).Modify(b => b.Inc(p => p.RepliesCount, 1)).ExecuteAsync(token);
-
-				await _fanout.Distribute(post, token);
-				await _outbox.Publish(author, post, create, token);
-				if (group is { IsFederated: true } && post.Visibility is PostVisibility.Public or PostVisibility.Unlisted)
-					await _delivery.EnqueueToFollowers(group, ActivityPubRenderer.Announce(group, post.ObjectURI, $"announce-{post.ID}"), token);
-
-				result.Data = ToView(post);
-				return result;
-			}
-			catch (Exception ex)
-			{
-				_logger.LogError(ex, $"{nameof(PostsService)}.{nameof(InsertPost)}");
-				return result.Invalidate(_localizer["Something went wrong."], exception: ex);
-			}
+				Title = form.Title,
+				SpoilerText = form.SpoilerText,
+				Sensitive = form.HasContentWarning,
+				Visibility = LocalVisibility(form.Visibility),
+				InReplyTo = form.AnsweringToPostId,
+				GroupId = form.GroupId
+			}, token), nameof(InsertPost));
 		}
 
 		public async Task<WebResult> DeletePost(string rootUserId, DeletePostForm form, CancellationToken token)
-		{
-			var result = new WebResult();
-			try
 		{
 			var author = await OwnedAvatar(rootUserId, form.AvatarId, token);
 			if (author == default)
-					return result.Invalidate(_localizer["Avatar not found."], StatusCodes.Status404NotFound);
-
-				var post = await _dbEntities.Posts
-					.Match(p => p.ID == form.PostId && p.GroupUserId == author.Id && !p.IsFederatedCopy)
-					.ExecuteFirstAsync(token);
-				if (post == default)
-					return result.Invalidate(_localizer["Post not found."], StatusCodes.Status404NotFound);
-
-				if (post.DeletedAt.HasValue)
+				return new WebResult().Invalidate(_localizer["Avatar not found."], StatusCodes.Status404NotFound);
+			var result = await Answer(() => _statuses.Remove(author, form.PostId, token), nameof(DeletePost));
+			result.Data = default;
 			return result;
-				var audience = await _outbox.Audience(author, post, token);
-				await DB.Default.Update<PostEntity>().MatchID(post.ID)
-					.Modify(p => p.DeletedAt, DateTime.UtcNow)
-					.Modify(p => p.Text, null)
-					.Modify(p => p.ContentHtml, null)
-					.Modify(p => p.Title, null)
-					.Modify(p => p.SpoilerText, null)
-					.Modify(p => p.Media, new List<PostMedia>())
-					.Modify(p => p.Revisions, new List<PostRevision>())
-					.ExecuteAsync(token);
-				await DB.Default.DeleteAsync<TimelineEntry>(e => e.PostId == post.ID);
-				if (!string.IsNullOrEmpty(post.AnsweringToPostId))
-					await DB.Default.Update<PostEntity>().MatchID(post.AnsweringToPostId).Modify(b => b.Inc(p => p.RepliesCount, -1)).ExecuteAsync(token);
-
-				if (audience.Count > 0)
-				{
-					var delete = ActivityPubRenderer.Delete(author, post.ObjectURI, $"delete-{post.ID}",
-						new JsonArray(post.To.Select(t => (JsonNode)t).ToArray()), new JsonArray(post.Cc.Select(c => (JsonNode)c).ToArray()));
-					await _delivery.Enqueue(author, audience, delete, token);
-				}
-				return result;
-			}
-			catch (Exception ex)
-			{
-				_logger.LogError(ex, $"{nameof(PostsService)}.{nameof(DeletePost)}");
-				return result.Invalidate(_localizer["Something went wrong."], exception: ex);
-			}
 		}
 
 		public async Task<WebResult> UpdatePost(string rootUserId, UpdatePostForm form, CancellationToken token)
-		{
-			var result = new WebResult();
-			try
 		{
 			var author = await OwnedAvatar(rootUserId, form.AvatarId, token);
 			if (author == default)
-					return result.Invalidate(_localizer["Avatar not found."], StatusCodes.Status404NotFound);
-				var post = await _dbEntities.Posts
-					.Match(p => p.ID == form.PostId && p.GroupUserId == author.Id && !p.IsFederatedCopy && !p.DeletedAt.HasValue)
-					.ExecuteFirstAsync(token);
-				if (post == default)
-					return result.Invalidate(_localizer["Post not found."], StatusCodes.Status404NotFound);
-
-				post.Revisions.Add(new PostRevision
+				return new WebResult().Invalidate(_localizer["Avatar not found."], StatusCodes.Status404NotFound);
+			return await Answer(() => _statuses.Edit(author, form.PostId, new StatusDraft
 			{
-					Title = post.Title,
-					SpoilerText = post.SpoilerText,
-					ContentHtml = post.ContentHtml,
-					HasContentWarning = post.HasContentWarning,
-					EditedAt = post.EditedAt ?? post.CreationDate
-				});
-				var rendered = await _content.Markdown(form.Text, token);
-				post.Title = form.Title;
-				post.SpoilerText = string.IsNullOrWhiteSpace(form.SpoilerText) ? default : form.SpoilerText.Trim();
-				post.HasContentWarning = form.HasContentWarning || post.SpoilerText != default;
-				post.Text = form.Text;
-				post.ContentHtml = rendered.Html;
-				post.Mentions = post.Visibility == PostVisibility.Direct
-					? post.Mentions.Concat(rendered.Mentions.Select(ToMention)).DistinctBy(m => m.ActorURI).ToList()
-					: rendered.Mentions.Select(ToMention).ToList();
-				post.Tags = rendered.Tags.ToList();
-				post.EditedAt = DateTime.UtcNow;
-				post.UpdateDate = post.EditedAt;
-				await DB.Default.SaveAsync(post, token);
-
-				if (!post.IsLocalOnly)
-				{
-					var group = string.IsNullOrEmpty(post.GroupId) ? default : await _localActors.FindById(LocalActorKind.Group, post.GroupId, token);
-					var note = post.Visibility == PostVisibility.Direct
-						? ActivityPubRenderer.DirectNote(post, author, Array.Empty<(string, string)>(), post.ContextURI)
-						: ActivityPubRenderer.Note(post, author, group, post.InReplyToURI);
-					note["to"] = new JsonArray(post.To.Select(t => (JsonNode)t).ToArray());
-					note["cc"] = new JsonArray(post.Cc.Select(c => (JsonNode)c).ToArray());
-					var update = new JsonObject
-					{
-						["@context"] = ActivityPubRenderer.Context(),
-						["id"] = author.ActivityUri($"update-{post.ID}-{new DateTimeOffset(post.EditedAt.Value).ToUnixTimeSeconds()}"),
-						["type"] = "Update",
-						["actor"] = author.Uri,
-						["to"] = note["to"]!.DeepClone(),
-						["cc"] = note["cc"]!.DeepClone(),
-						["object"] = note
-					};
-					await _outbox.Publish(author, post, update, token);
-				}
-
-				result.Data = ToView(post);
-				return result;
-			}
-			catch (Exception ex)
-			{
-				_logger.LogError(ex, $"{nameof(PostsService)}.{nameof(UpdatePost)}");
-				return result.Invalidate(_localizer["Something went wrong."], exception: ex);
-			}
+				Text = form.Text,
+				Title = form.Title,
+				SpoilerText = form.SpoilerText,
+				Sensitive = form.HasContentWarning
+			}, token), nameof(UpdatePost));
 		}
 
 		public async Task<WebResult> GetPosts(string rootUserId, string avatarId, string groupId, CancellationToken token)
@@ -293,98 +130,20 @@ namespace PrivaPub.Services
 		}
 
 		public async Task<WebResult> InsertDm(string rootUserId, InsertDmForm form, CancellationToken token)
-		{
-			var result = new WebResult();
-			try
 		{
 			var author = await OwnedAvatar(rootUserId, form.AvatarId, token);
 			if (author == default)
-					return result.Invalidate(_localizer["Avatar not found."], StatusCodes.Status404NotFound);
-
-				DmGroup dmGroup;
-				if (!string.IsNullOrEmpty(form.DmGroupId))
+				return new WebResult().Invalidate(_localizer["Avatar not found."], StatusCodes.Status404NotFound);
+			if (string.IsNullOrEmpty(form.DmGroupId) && form.Recipients.Count == 0)
+				return new WebResult().Invalidate(_localizer["At least one recipient is required."]);
+			return await Answer(() => _statuses.Publish(author, new StatusDraft
 			{
-					dmGroup = await _dbEntities.DmGroups.MatchID(form.DmGroupId).ExecuteFirstAsync(token);
-					if (dmGroup == default || !dmGroup.Members.Any(m => !m.IsForeign && m.AvatarId == author.Id))
-						return result.Invalidate(_localizer["Conversation not found."], StatusCodes.Status404NotFound);
-				}
-				else
-				{
-					if (form.Recipients.Count == 0)
-						return result.Invalidate(_localizer["At least one recipient is required."]);
-					var members = new List<GroupMember> { new() { AvatarId = author.Id } };
-					foreach (var recipient in form.Recipients.Distinct(StringComparer.OrdinalIgnoreCase))
-					{
-						var member = await ResolveRecipient(recipient, token);
-						if (member == default)
-							return result.Invalidate(_localizer["Recipient '{0}' not found.", recipient], StatusCodes.Status404NotFound);
-						if (members.All(m => m.AvatarId != member.AvatarId))
-							members.Add(member);
-					}
-					var key = DmGroup.KeyOf(members);
-					dmGroup = await _dbEntities.DmGroups.Match(g => g.ParticipantsKey == key && !g.DeletionAt.HasValue).ExecuteFirstAsync(token);
-					if (dmGroup == default)
-					{
-						dmGroup = new DmGroup { Members = members, ParticipantsKey = key };
-						dmGroup.ID = (string)dmGroup.GenerateNewID();
-						dmGroup.ConversationURI = author.ConversationUri(dmGroup.ID);
-						await DB.Default.SaveAsync(dmGroup, token);
-					}
-				}
-
-				var dm = new PostEntity
-				{
-					GroupUserId = author.Id,
-					AuthorAccountId = author.Id,
-					ConversationId = dmGroup.ID,
-					Visibility = PostVisibility.Direct,
-					ContextURI = dmGroup.ConversationURI,
 				Text = form.Text,
-					ContentHtml = (await _content.Markdown(form.Text, token)).Html,
-					ContentFormat = ContentFormat.Markdown,
-					HasContentWarning = form.HasContentWarning,
-					ActorURI = author.Uri
-				};
-				dm.ID = (string)dm.GenerateNewID();
-				dm.ObjectURI = author.PostUri(dm.ID);
-				dm.Url = author.PostHtmlUrl(dm.ID);
-
-				var remote = new List<(string Uri, string Handle)>();
-				var inboxes = new List<string>();
-				foreach (var member in dmGroup.Members.Where(m => m.IsForeign))
-				{
-					var foreign = await _dbEntities.ForeignAvatars.Match(a => a.ActorURI == member.AvatarId).ExecuteFirstAsync(token);
-					if (foreign == default)
-						continue;
-					remote.Add((foreign.ActorURI, $"{foreign.UserName}@{foreign.Domain}"));
-					inboxes.Add(foreign.InboxURL);
-				}
-				foreach (var member in dmGroup.Members.Where(m => !m.IsForeign && m.AvatarId != author.Id))
-				{
-					var local = await _localActors.FindById(LocalActorKind.Person, member.AvatarId, token);
-					if (local != default)
-						remote.Add((local.Uri, local.Handle));
-				}
-
-				var directNote = ActivityPubRenderer.DirectNote(dm, author, remote, dmGroup.ConversationURI);
-				var directCreate = ActivityPubRenderer.Create(author, directNote, $"create-{dm.ID}");
-				dm.ActivityURI = directCreate["id"]!.GetValue<string>();
-				dm.To = Strings(directNote["to"]);
-				dm.Mentions = remote.Select(r => new PostMention { ActorURI = r.Uri, Handle = "@" + r.Handle, IsLocal = r.Uri.StartsWith(author.BaseAddress + "/") }).ToList();
-				await DB.Default.SaveAsync(dm, token);
-				await DB.Default.Update<DmGroup>().MatchID(dmGroup.ID).Modify(g => g.UpdatedAt, DateTime.UtcNow).ExecuteAsync(token);
-				await _fanout.Distribute(dm, token);
-				if (inboxes.Count > 0)
-					await _delivery.Enqueue(author, inboxes, directCreate, token);
-
-				result.Data = ToView(dm);
-				return result;
-			}
-			catch (Exception ex)
-			{
-				_logger.LogError(ex, $"{nameof(PostsService)}.{nameof(InsertDm)}");
-				return result.Invalidate(_localizer["Something went wrong."], exception: ex);
-			}
+				Sensitive = form.HasContentWarning,
+				Visibility = PostVisibility.Direct,
+				ConversationId = form.DmGroupId,
+				Recipients = form.Recipients
+			}, token), nameof(InsertDm));
 		}
 
 		public async Task<WebResult> GetDms(string rootUserId, string avatarId, string dmGroupId, CancellationToken token)
@@ -432,29 +191,24 @@ namespace PrivaPub.Services
 			}
 		}
 
-		async Task<GroupMember> ResolveRecipient(string recipient, CancellationToken token)
-		{
-			var handle = recipient.Trim().TrimStart('@');
-			if (!handle.Contains('@') || handle.EndsWith("@" + new Uri(_localActors.BaseAddress).Authority, StringComparison.OrdinalIgnoreCase))
-			{
-				var local = await _localActors.FindByUserName(handle.Split('@')[0], token);
-				return local is { Kind: LocalActorKind.Person } ? new GroupMember { AvatarId = local.Id } : default;
-			}
 
-			var actorUri = await _remoteActors.ResolveHandle(handle, token);
-			if (actorUri == default)
-				return default;
-			var foreign = await _remoteActors.GetActor(actorUri, refresh: false, token);
-			return foreign == default ? default : new GroupMember { AvatarId = foreign.ActorURI, IsForeign = true };
-		}
 
-		async Task<PostEntity> Parent(string answeringTo, CancellationToken token)
+		async Task<WebResult> Answer(Func<Task<StatusOutcome>> action, string operation)
 		{
-			if (string.IsNullOrEmpty(answeringTo))
-				return default;
-			return answeringTo.StartsWith("https://", StringComparison.OrdinalIgnoreCase)
-				? await _dbEntities.Posts.Match(p => p.ObjectURI == answeringTo).ExecuteFirstAsync(token)
-				: await _dbEntities.Posts.MatchID(answeringTo).ExecuteFirstAsync(token);
+			var result = new WebResult();
+			try
+			{
+				var outcome = await action();
+				if (!outcome.Ok)
+					return result.Invalidate(_localizer[outcome.Error], outcome.Status);
+				result.Data = ToView(outcome.Post);
+				return result;
+			}
+			catch (Exception ex)
+			{
+				_logger.LogError(ex, "{Service}.{Operation}", nameof(PostsService), operation);
+				return result.Invalidate(_localizer["Something went wrong."], exception: ex);
+			}
 		}
 
 		static PostVisibility LocalVisibility(string requested) => requested?.ToLowerInvariant() switch
@@ -464,19 +218,8 @@ namespace PrivaPub.Services
 			_ => PostVisibility.Public
 		};
 
-		static PostMention ToMention(ResolvedMention mention) => new()
-		{
-			ActorURI = mention.ActorUri,
-			Handle = "@" + mention.Handle,
-			IsLocal = mention.IsLocal,
-			AccountId = mention.AccountId
-		};
 
-		static string RemoteUri(string answeringTo) =>
-			answeringTo != default && answeringTo.StartsWith("https://", StringComparison.OrdinalIgnoreCase) ? answeringTo : default;
 
-		static List<string> Strings(JsonNode node) =>
-			node is JsonArray array ? array.Select(n => n?.GetValue<string>()).Where(s => s != default).ToList() : new List<string>();
 
 		async Task<LocalActor> OwnedAvatar(string rootUserId, string avatarId, CancellationToken token)
 		{

PrivaPub/Web/Pages/Pages.cs

@@ -72,6 +72,7 @@ namespace PrivaPub.Web.Pages
 					? _dbEntities.Posts.Match(p => p.GroupId == Actor.Id)
 					: _dbEntities.Posts.Match(p => p.GroupUserId == Actor.Id && !p.IsFederatedCopy))
 				.Match(VisibilityPolicy.IsPublic)
+				.Match(p => p.ReblogOfPostId == null)
 				.Sort(p => p.ID, Order.Descending)
 				.Limit(PageSize)
 				.ExecuteAsync(token);
@@ -112,7 +113,7 @@ namespace PrivaPub.Web.Pages
 			if (Actor is not { IsFederated: true, Kind: LocalActorKind.Person })
 				return NotFound();
 			var post = await _dbEntities.Posts
-				.Match(p => p.ID == id && p.GroupUserId == Actor.Id && !p.IsFederatedCopy)
+				.Match(p => p.ID == id && p.GroupUserId == Actor.Id && !p.IsFederatedCopy && p.ReblogOfPostId == null)
 				.Match(VisibilityPolicy.IsPublic)
 				.ExecuteFirstAsync(token);
 			if (post == default)