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Blocks, mutes, bookmarks, pins and reports

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- Blocks are per persona and never federate (a Block activity would tell
  the other server who blocked whom): the blocked account is removed as a
  follower, with a Reject{Follow} if it is remote, unfollowed, cleared from
  home and notifications, and refused with Reject if it follows again.
- Mutes (optionally timed, optionally sparing notifications) and per-
  persona domain blocks keep authors out of home timelines, notifications
  and every status list the API returns; the boosts of a hidden author's
  posts are hidden too.
- Bookmarks and pins (at most five, public or unlisted, own posts) with
  their Mastodon endpoints and flags; pinned posts are the actor's
  `featured` collection at /trophies, and `featuredTags` points at
  /tattoos.
- Reports: /api/v1/reports stores the report and, when forwarding to a
  remote account, sends Flag from the instance actor, so the reporting
  persona is never named to the other server. An inbound Flag about a local
  persona or its posts becomes a report; moderators list and resolve them
  under /clientapi/moderator/reports.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB
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thepraandClaude Opus 5.5 committed 2026-10-01 12:13:57 +02:00
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commit 8f75317050
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PrivaPub/Domain/Relationships/RelationshipService.cs
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using MongoDB.Driver;
using MongoDB.Entities;
using PrivaPub.Domain.Social;
using PrivaPub.Federation.Actors;
using PrivaPub.Federation.Outbox;
using PrivaPub.Federation.Rendering;
using PrivaPub.Models.Federation;
using PrivaPub.Models.Social;
using PrivaPub.StaticServices;
using System.Text.Json.Nodes;
namespace PrivaPub.Domain.Relationships
{
public interface IRelationshipService
{
Task Block(LocalActor me, string targetActorUri, string targetAccountId, CancellationToken token);
Task Unblock(LocalActor me, string targetActorUri, CancellationToken token);
Task Mute(LocalActor me, string targetActorUri, string targetAccountId, bool hideNotifications, TimeSpan? duration, CancellationToken token);
Task Unmute(LocalActor me, string targetActorUri, CancellationToken token);
Task BlockDomain(LocalActor me, string domain, CancellationToken token);
Task UnblockDomain(LocalActor me, string domain, CancellationToken token);
}
public class RelationshipService : IRelationshipService
{
readonly DbEntities _dbEntities;
readonly IFollowService _follows;
readonly IDeliveryService _delivery;
public RelationshipService(DbEntities dbEntities, IFollowService follows, IDeliveryService delivery)
{
_dbEntities = dbEntities;
_follows = follows;
_delivery = delivery;
}
public async Task Block(LocalActor me, string targetActorUri, string targetAccountId, CancellationToken token)
{
try
{
await DB.Default.SaveAsync(new Block { AvatarId = me.Id, TargetAccountId = targetAccountId, TargetActorURI = targetActorUri }, token);
}
catch (MongoWriteException ex) when (ex.WriteError?.Category == ServerErrorCategory.DuplicateKey)
{
}
await _follows.UnfollowAs(me, targetActorUri, token);
var follower = await _dbEntities.Followers.Match(f => f.LocalActorId == me.Id && f.ActorURI == targetActorUri).ExecuteFirstAsync(token);
if (follower != default)
{
await DB.Default.DeleteAsync<Follower>(follower.ID);
if (!targetActorUri.StartsWith(me.BaseAddress + "/", StringComparison.OrdinalIgnoreCase) && !string.IsNullOrEmpty(follower.FollowActivityURI))
{
var reject = new JsonObject
{
["@context"] = ActivityPubRenderer.ActivityStreams,
["id"] = me.ActivityUri($"reject-{follower.ID}-{DateTime.UtcNow.Ticks}"),
["type"] = "Reject",
["actor"] = me.Uri,
["object"] = new JsonObject { ["id"] = follower.FollowActivityURI, ["type"] = "Follow", ["actor"] = targetActorUri, ["object"] = me.Uri }
};
await _delivery.Enqueue(me, new[] { follower.InboxURL }, reject, token);
}
else
await DB.Default.DeleteAsync<Following>(f => f.TargetActorURI == me.Uri && f.AvatarId == targetAccountId);
}
await Forget(me, targetAccountId, token);
}
public async Task Unblock(LocalActor me, string targetActorUri, CancellationToken token) =>
await DB.Default.DeleteAsync<Block>(b => b.AvatarId == me.Id && b.TargetActorURI == targetActorUri);
public async Task Mute(LocalActor me, string targetActorUri, string targetAccountId, bool hideNotifications, TimeSpan? duration, CancellationToken token)
{
await DB.Default.Update<Mute>()
.Match(m => m.AvatarId == me.Id && m.TargetActorURI == targetActorUri)
.Modify(m => m.TargetAccountId, targetAccountId)
.Modify(m => m.HideNotifications, hideNotifications)
.Modify(m => m.ExpiresAt, duration.HasValue && duration > TimeSpan.Zero ? DateTime.UtcNow + duration : null)
.Modify(b => b.SetOnInsert(m => m.CreatedAt, DateTime.UtcNow))
.Option(o => o.IsUpsert = true)
.ExecuteAsync(token);
await Forget(me, targetAccountId, token);
}
public async Task Unmute(LocalActor me, string targetActorUri, CancellationToken token) =>
await DB.Default.DeleteAsync<Mute>(m => m.AvatarId == me.Id && m.TargetActorURI == targetActorUri);
public async Task BlockDomain(LocalActor me, string domain, CancellationToken token)
{
domain = domain?.Trim().ToLowerInvariant();
if (string.IsNullOrEmpty(domain) || Uri.CheckHostName(domain) != UriHostNameType.Dns)
return;
try
{
await DB.Default.SaveAsync(new AccountDomainBlock { AvatarId = me.Id, Domain = domain }, token);
}
catch (MongoWriteException ex) when (ex.WriteError?.Category == ServerErrorCategory.DuplicateKey)
{
}
foreach (var following in await _dbEntities.Followings.Match(f => f.AvatarId == me.Id && !f.TargetIsLocal).ExecuteAsync(token))
if (Hidden.HostMatches(following.TargetActorURI, domain))
await _follows.UnfollowAs(me, following.TargetActorURI, token);
foreach (var follower in await _dbEntities.Followers.Match(f => f.LocalActorId == me.Id).ExecuteAsync(token))
if (Hidden.HostMatches(follower.ActorURI, domain))
await DB.Default.DeleteAsync<Follower>(follower.ID);
}
public async Task UnblockDomain(LocalActor me, string domain, CancellationToken token)
{
domain = domain?.Trim().ToLowerInvariant();
await DB.Default.DeleteAsync<AccountDomainBlock>(b => b.AvatarId == me.Id && b.Domain == domain);
}
static async Task Forget(LocalActor me, string targetAccountId, CancellationToken token)
{
if (string.IsNullOrEmpty(targetAccountId))
return;
await DB.Default.DeleteAsync<TimelineEntry>(e => e.AvatarId == me.Id && e.AuthorAccountId == targetAccountId);
await DB.Default.DeleteAsync<Notification>(n => n.AvatarId == me.Id && n.FromAccountId == targetAccountId);
}
}
public static class Hidden
{
public static bool HostMatches(string actorUri, string domain) =>
Uri.TryCreate(actorUri, UriKind.Absolute, out var uri)
&& (uri.Host.Equals(domain, StringComparison.OrdinalIgnoreCase) || uri.Host.EndsWith("." + domain, StringComparison.OrdinalIgnoreCase));
public static async Task<HashSet<string>> AuthorsHiddenFrom(string avatarId, IEnumerable<string> actorUris, bool forNotifications, CancellationToken token)
{
var uris = actorUris.Where(u => !string.IsNullOrEmpty(u)).Distinct().ToList();
var hidden = new HashSet<string>(StringComparer.Ordinal);
if (string.IsNullOrEmpty(avatarId) || uris.Count == 0)
return hidden;
var now = DateTime.UtcNow;
foreach (var block in await DB.Default.Find<Block>().Match(b => b.AvatarId == avatarId && uris.Contains(b.TargetActorURI)).ExecuteAsync(token))
hidden.Add(block.TargetActorURI);
foreach (var mute in await DB.Default.Find<Mute>().Match(m => m.AvatarId == avatarId && uris.Contains(m.TargetActorURI)).ExecuteAsync(token))
if ((mute.ExpiresAt == null || mute.ExpiresAt > now) && (!forNotifications || mute.HideNotifications))
hidden.Add(mute.TargetActorURI);
var domains = await DB.Default.Find<AccountDomainBlock>().Match(b => b.AvatarId == avatarId).ExecuteAsync(token);
foreach (var uri in uris)
if (domains.Any(d => HostMatches(uri, d.Domain)))
hidden.Add(uri);
return hidden;
}
public static async Task<HashSet<string>> RecipientsHiding(IEnumerable<string> avatarIds, string actorUri, CancellationToken token)
{
var ids = avatarIds.Distinct().ToList();
var hiding = new HashSet<string>(StringComparer.Ordinal);
if (ids.Count == 0 || string.IsNullOrEmpty(actorUri))
return hiding;
var now = DateTime.UtcNow;
foreach (var block in await DB.Default.Find<Block>().Match(b => ids.Contains(b.AvatarId) && b.TargetActorURI == actorUri).ExecuteAsync(token))
hiding.Add(block.AvatarId);
foreach (var mute in await DB.Default.Find<Mute>().Match(m => ids.Contains(m.AvatarId) && m.TargetActorURI == actorUri).ExecuteAsync(token))
if (mute.ExpiresAt == null || mute.ExpiresAt > now)
hiding.Add(mute.AvatarId);
foreach (var block in await DB.Default.Find<AccountDomainBlock>().Match(b => ids.Contains(b.AvatarId)).ExecuteAsync(token))
if (HostMatches(actorUri, block.Domain))
hiding.Add(block.AvatarId);
return hiding;
}
}
}