70 lines
2.3 KiB
C#
70 lines
2.3 KiB
C#
 
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using MongoDB.Entities;
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using PrivaPub.Federation.Actors;
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using PrivaPub.Federation.Objects;
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using PrivaPub.Federation.Outbox;
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using PrivaPub.Federation.Rendering;
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using PrivaPub.Models.Federation;
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using PrivaPub.Models.Group;
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using PrivaPub.Models.Post;
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using PrivaPub.Models.User;
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using PrivaPub.StaticServices;
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using System.Text.Json.Nodes;
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using static PrivaPub.Federation.Inbox.ForeignMembers;
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using static PrivaPub.Federation.Objects.ActivityJson;
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using DmPostEntity = PrivaPub.Models.Post.DmPost;
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using PostEntity = PrivaPub.Models.Post.Post;
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namespace PrivaPub.Federation.Inbox.Handlers
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{
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public class UndoHandler : IActivityHandler
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{
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readonly DbEntities _dbEntities;
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readonly ILocalActorService _localActors;
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readonly IRemoteActorService _remoteActors;
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readonly IDeliveryService _delivery;
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public UndoHandler(DbEntities dbEntities, ILocalActorService localActors, IRemoteActorService remoteActors, IDeliveryService delivery)
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{
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_dbEntities = dbEntities;
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_localActors = localActors;
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_remoteActors = remoteActors;
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_delivery = delivery;
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}
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public string Type => "Undo";
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public async Task Handle(JsonNode activity, ForeignAvatar actor, CancellationToken token)
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{
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var undo = activity;
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var inner = undo["object"];
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var innerType = inner is JsonObject ? Value(inner, "type") : default;
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var innerId = Id(inner);
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if (inner is JsonObject && Id(inner["actor"]) != actor.ActorURI)
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return;
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if (innerType is not (null or "Follow"))
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return;
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var followers = await _dbEntities.Followers.Match(f => f.ActorURI == actor.ActorURI).ExecuteAsync(token);
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var targetUri = inner is JsonObject ? Id(inner["object"]) : default;
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foreach (var follower in followers)
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{
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var matchesActivity = innerId != default && follower.FollowActivityURI == innerId;
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var target = targetUri == default ? default : await _localActors.FindByUri(targetUri, token);
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var matchesTarget = target != default && target.Id == follower.LocalActorId && target.Kind == follower.LocalActorKind;
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if (!matchesActivity && !matchesTarget)
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continue;
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await DB.Default.DeleteAsync<Follower>(follower.ID);
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if (follower.LocalActorKind == LocalActorKind.Group)
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await RemoveForeignMember(follower.LocalActorId, actor.ActorURI, token);
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}
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return;
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}
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}
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}
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