50 lines
1.5 KiB
C#
50 lines
1.5 KiB
C#
 
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using MongoDB.Entities;
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using PrivaPub.Federation.Actors;
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using PrivaPub.Models.User;
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using System.Text.Json.Nodes;
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using static PrivaPub.Federation.Objects.ActivityJson;
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namespace PrivaPub.Federation.Inbox.Handlers
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{
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// An account moving to another (Mastodon's Move{object: itself, target: the new account}), believed as Mastodon
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// believes it: the moving account sends it about itself, and the new account, read again from its own server, names
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// it among its alsoKnownAs. The old account then shows where it went (`moved`). The personas following it keep
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// following it: following the new one is theirs to do.
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public class MoveHandler : IActivityHandler
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{
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readonly IRemoteActorService _remoteActors;
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public MoveHandler(IRemoteActorService remoteActors)
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{
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_remoteActors = remoteActors;
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}
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public string Type => "Move";
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public async Task Handle(JsonNode activity, ForeignAvatar actor, CancellationToken token)
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{
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var target = Id(activity["target"]);
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if (Id(activity["object"]) != actor.ActorURI || string.IsNullOrEmpty(target) || target == actor.ActorURI)
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{
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Arrival.Drop("not-self");
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return;
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}
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var moved = await _remoteActors.GetActor(target, refresh: true, token);
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if (moved == default)
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{
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Arrival.Drop("target-unavailable");
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return;
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}
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if (!moved.AlsoKnownAs.Contains(actor.ActorURI))
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{
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Arrival.Drop("not-aliased");
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return;
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}
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await DB.Default.Update<ForeignAvatar>().MatchID(actor.ID).Modify(a => a.MovedToURL, target).ExecuteAsync(token);
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Arrival.Accept("moved");
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}
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}
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}
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