thepraandClaude Opus 5.5
a5d9a89445
Communities: - a post addressed to a community (to, cc or audience) is accepted according to its posting policy - followers, anyone, or moderators - and GroupDistributor announces the whole activity with `audience` to the community's followers, plus the object for new posts so Mastodon shows them; updates and deletes of community content are announced too; - top-level posts are Pages with a name (the title, or a headline from the text); /flock counts members, /wardens lists moderators; - a Mastodon client posts into a community by mentioning it, or into a remote group, which sets `audience`; - an Announce of an activity from a remote group a persona follows (Lemmy) is followed through: the object is fetched from its own origin, kept with its AudienceURI, and fanned out to the group's local followers; updates are applied in place and deletes checked against the origin. Circles stop being local-only: an undiscoverable Group actor whose follows are all requests the owner approves; posts addressed to the circle and its /flock and delivered to members' own inboxes, never announced, never public; a remote member's post into the circle is accepted from members only. SignedFetchAuthorizer serves circle posts and collections only to a signed request from a member or a member server's instance actor - 404 for anyone else. Circles never surface in search, lookups, mentions, account ids or profile pages. Federation:SecureMode requires a valid signature on every GET under /peasants except the instance actor. Group forms take a posting policy. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB
49 lines
1.6 KiB
C#
49 lines
1.6 KiB
C#
using PrivaPub.Federation.Actors;
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using PrivaPub.Federation.Rendering;
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using System.Security.Cryptography;
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using System.Text;
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using System.Text.Json.Nodes;
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namespace PrivaPub.Federation.Outbox
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{
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public interface IGroupDistributor
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{
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Task Announce(LocalActor group, JsonObject activity, string objectUri, bool isNewPost, CancellationToken token);
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}
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public class GroupDistributor : IGroupDistributor
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{
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readonly IDeliveryService _delivery;
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public GroupDistributor(IDeliveryService delivery)
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{
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_delivery = delivery;
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}
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public async Task Announce(LocalActor group, JsonObject activity, string objectUri, bool isNewPost, CancellationToken token)
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{
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if (group is not { IsCircle: false, Kind: Models.Federation.LocalActorKind.Group })
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return;
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var embedded = (JsonObject)activity.DeepClone();
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embedded.Remove("@context");
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embedded["audience"] ??= group.Uri;
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var key = Convert.ToHexStringLower(SHA256.HashData(Encoding.UTF8.GetBytes(activity["id"]?.GetValue<string>() ?? embedded.ToJsonString())))[..24];
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var announce = new JsonObject
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{
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["@context"] = ActivityPubRenderer.Context(),
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["id"] = group.ActivityUri($"announce-{key}"),
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["type"] = "Announce",
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["actor"] = group.Uri,
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["to"] = new JsonArray(ActivityPubRenderer.Public),
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["cc"] = new JsonArray(group.Followers),
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["audience"] = group.Uri,
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["object"] = embedded
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};
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await _delivery.EnqueueToFollowers(group, announce, token);
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if (isNewPost && !string.IsNullOrEmpty(objectUri))
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await _delivery.EnqueueToFollowers(group, ActivityPubRenderer.Announce(group, objectUri, $"announce-object-{key}"), token);
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}
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}
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}
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