thepraandClaude Opus 5.5
2eb2a63f1e
S8: a direct message joins a conversation only when its participants are exactly that conversation's members, found through a new DmGroup.ParticipantsKey (a hash of the sorted members). A remote context no longer decides anything: it let anyone who knew a conversation's context post into it, and joining by context while dropping a participant would have shown a reply to someone it was not addressed to. A context is kept only when it is on the author's origin. Sending a DM to the same people again reuses their conversation instead of opening a new one. S9: Group.Kind is Circle or Community. A circle is not a federated actor: its actor, collections, WebFinger and inbox answer 404, a remote Follow is refused, and posts in it are IsLocalOnly - never delivered, never in an outbox, never served. Communities keep today's behaviour until P4. Migration _003 makes every existing group a circle, marks their posts local-only and backfills the conversation keys. End-to-end inbox tests sign real deliveries from a fake peer: a context injection, a forged activity id, a note attributed to someone else, a cross-origin object, a bad signature, junk bodies and a Follow of a circle. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB
24 lines
822 B
C#
24 lines
822 B
C#
using MongoDB.Entities;
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using System.Security.Cryptography;
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using System.Text;
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namespace PrivaPub.Models.Group
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{
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public class DmGroup : Entity
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{
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public string Description { get; set; }
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public List<GroupMember> Members { get; set; } = new();
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public string ConversationURI { get; set; }//context of the federated thread
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public string ParticipantsKey { get; set; }
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public DateTime CreationDate { get; set; } = DateTime.UtcNow;
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public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
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public DateTime? DeletionAt { get; set; }
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public static string KeyOf(IEnumerable<GroupMember> members) =>
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Convert.ToHexStringLower(SHA256.HashData(Encoding.UTF8.GetBytes(string.Join("\n",
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members.Select(m => (m.IsForeign ? "remote:" : "local:") + m.AvatarId).Distinct().Order(StringComparer.Ordinal)))));
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}
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}
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