45 lines
1.9 KiB
C#
45 lines
1.9 KiB
C#
 
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using PrivaPub.Federation.Objects;
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using PrivaPub.Infrastructure.Jobs;
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using PrivaPub.Models.Jobs;
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using PrivaPub.Models.User;
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using System.Text.Json;
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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
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{
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// FEP-171b conversation containers (Hubzilla, Streams, Forte): a thread's owner adds each activity in it to the
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// thread's context, a collection of its own, and tells the thread's audience with Add{activity}. The activity it adds
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// is another's, so it is taken as forwarded by the owner: a Create, Update or Delete of the actor's own object,
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// believed on its FEP-8b32 proof or as its origin has it (Forwarded). Hubzilla also passes the activity on by itself;
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// the two are one job.
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public static class ConversationContainers
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{
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public static async Task<bool> Unwrap(JsonNode add, ForeignAvatar owner, IJobQueue queue, CancellationToken token)
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{
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if (add["object"] is not JsonObject inner || Value(inner, "type") is not ("Create" or "Update" or "Delete") || Id(inner) is not { } innerId)
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return false;
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var target = add["target"];
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var context = Id(target);
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if (context == default || !Origin.Same(context, owner.ActorURI)
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|| target is JsonObject collection && Id(collection["attributedTo"]) is { } attributedTo && attributedTo != owner.ActorURI)
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return false;
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var actorUri = Id(inner["actor"]);
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if (actorUri == default || !Forwarded.Takeable(Value(inner, "type"), inner, actorUri))
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{
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Arrival.Drop("container-unusable");
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return true;
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}
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var payload = new InboxPayload(actorUri, inner.ToJsonString(), "shared", ReceivedAt: DateTime.UtcNow, ForwardedBy: owner.ActorURI);
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var queued = await queue.Enqueue(JobKind.ProcessInbox, JsonSerializer.Serialize(payload), new Uri(actorUri).Host.ToLowerInvariant(),
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"inbox|forwarded|" + innerId, token);
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if (queued)
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Arrival.Accept("unwrapped");
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else
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Arrival.Drop("duplicate");
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return true;
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}
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}
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}
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